docs: cut v0.20.0 — Terminal design system + Android persistence

Promotes the [Unreleased] section to [0.20.0] dated 2026-05-07
and opens a fresh empty [Unreleased]. The cycle's two through-
lines:

- **Terminal visual-identity port.** ui_theme token system
  (0d477ac) is load-bearing; downstream chrome migrations cover
  the modal scaffold, gameplay-feedback layer (ceec4fc), toasts
  with a new ToastVariant enum (a137607), table chrome (651f406),
  card chrome (d752870), splash cursor (cdcadda), and final
  hint-source / dest pairing (9891ae4). Card-face / suit / card-
  back palette intentionally NOT migrated — those track PNG
  artwork that hasn't been regenerated yet. The 24 Stitch-rendered
  mockups and design-system.md spec landed in fa7f98a.
- **Android persistence shim.** solitaire_data::data_dir
  routes through a per-platform shim (4b51e50) closing the
  CLAUDE.md §10 dirs::data_dir() = None pitfall on Android.
  Settings, stats, achievements, replays, game-state, time-attack
  sessions, and user themes now persist on a real APK.

Also closes three v0.19.0 punch-list candidates that landed
earlier in the cycle (pull_failure flake at 67c150b, smart-window-
size opt-out at e1b8766, Shareable badge at 9b065e5).

Tests: 1176 passing / 0 failing (six new this cycle: ui_theme
invariant guards, toast-variant-border-mapping, palette-tracking
guards on MARKER_VALID / HINT_PILE_HIGHLIGHT_COLOUR /
RIGHT_CLICK_HIGHLIGHT_COLOUR / toast-border distinctness).

SESSION_HANDOFF.md refreshed: HEAD pointer, test count, the
v0.20.0 changelog summary, the open punch list (Phase Android
runtime gaps, visual-identity follow-ups including the artwork
regeneration item), the updated design-direction box (was
Midnight Purple + Balatro yellow; now base16-eighties Terminal),
and a refreshed Resume Prompt offering A–F next-step options.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.sqlx/query-3a9bd2e51b2389da5b7e85f26806fcffa896748e0b589d216cf60827fc3857a9.json

@@ -0,0 +1,68 @@
+{
+  "db_name": "SQLite",
+  "query": "SELECT\n              r.id              AS \"id!: String\",\n              u.username        AS \"username!: String\",\n              r.seed            AS \"seed!: i64\",\n              r.draw_mode       AS \"draw_mode!: String\",\n              r.mode            AS \"mode!: String\",\n              r.time_seconds    AS \"time_seconds!: i64\",\n              r.final_score     AS \"final_score!: i64\",\n              r.recorded_at     AS \"recorded_at!: String\",\n              r.received_at     AS \"received_at!: String\"\n           FROM replays r\n           JOIN users   u ON u.id = r.user_id\n           ORDER BY r.received_at DESC\n           LIMIT ?",
+  "describe": {
+    "columns": [
+      {
+        "name": "id!: String",
+        "ordinal": 0,
+        "type_info": "Text"
+      },
+      {
+        "name": "username!: String",
+        "ordinal": 1,
+        "type_info": "Text"
+      },
+      {
+        "name": "seed!: i64",
+        "ordinal": 2,
+        "type_info": "Integer"
+      },
+      {
+        "name": "draw_mode!: String",
+        "ordinal": 3,
+        "type_info": "Text"
+      },
+      {
+        "name": "mode!: String",
+        "ordinal": 4,
+        "type_info": "Text"
+      },
+      {
+        "name": "time_seconds!: i64",
+        "ordinal": 5,
+        "type_info": "Integer"
+      },
+      {
+        "name": "final_score!: i64",
+        "ordinal": 6,
+        "type_info": "Integer"
+      },
+      {
+        "name": "recorded_at!: String",
+        "ordinal": 7,
+        "type_info": "Text"
+      },
+      {
+        "name": "received_at!: String",
+        "ordinal": 8,
+        "type_info": "Text"
+      }
+    ],
+    "parameters": {
+      "Right": 1
+    },
+    "nullable": [
+      true,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "3a9bd2e51b2389da5b7e85f26806fcffa896748e0b589d216cf60827fc3857a9"
+}

.sqlx/query-5bc1984044bc792c2e9577a159ca22789469df14cb25144451f37e8cdad8165c.json

@@ -0,0 +1,20 @@
+{
+  "db_name": "SQLite",
+  "query": "SELECT replay_json FROM replays WHERE id = ?",
+  "describe": {
+    "columns": [
+      {
+        "name": "replay_json",
+        "ordinal": 0,
+        "type_info": "Text"
+      }
+    ],
+    "parameters": {
+      "Right": 1
+    },
+    "nullable": [
+      false
+    ]
+  },
+  "hash": "5bc1984044bc792c2e9577a159ca22789469df14cb25144451f37e8cdad8165c"
+}

.sqlx/query-6a36a96faa9d9b423aae3b72b0c049a1489b67ca2361581b2300bb4ee0bc9e2f.json

@@ -0,0 +1,12 @@
+{
+  "db_name": "SQLite",
+  "query": "INSERT INTO replays (\n              id, user_id, seed, draw_mode, mode, time_seconds, final_score,\n              recorded_at, received_at, replay_json\n           ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Right": 10
+    },
+    "nullable": []
+  },
+  "hash": "6a36a96faa9d9b423aae3b72b0c049a1489b67ca2361581b2300bb4ee0bc9e2f"
+}

ARCHITECTURE.md

@@ -47,11 +47,10 @@ Solitaire Quest is a cross-platform Klondike Solitaire game written in Rust, tar
 ### Design Principles
 
 - **Offline first.** The local file is always the source of truth. Sync is additive, never destructive.
-- **Pure core.** All game logic lives in a dependency-free Rust crate with no Bevy, no network, and no I/O. This keeps it fully unit-testable and portable.
-- **No panics in game logic.** Every state transition returns `Result<_, MoveError>`. Panics are only acceptable in startup/configuration code.
 - **One language, one repo.** The game client, sync client, shared types, and sync server are all Rust crates in a single Cargo workspace.
 - **Plugin-based Bevy architecture.** Each major feature is a Bevy `Plugin`. Systems are small and single-purpose. Cross-system communication uses Bevy `Event`s.
-- **UI-first interaction.** Every player-triggered action — new game, undo, draw, pause, open stats / settings / help / profile / leaderboard, etc. — must be reachable from a visible UI control. Keyboard shortcuts exist only as optional accelerators for power users; they are never the sole entry point. A player using only mouse or touch must be able to perform every action. New gameplay features ship with the UI control alongside the system that backs it.
+
+Pure-core, no-panics-in-game-logic, and UI-first-interaction constraints are enforced by CLAUDE.md §2.1, §2.3, and §3.3 respectively — those are the canonical statements; this file describes the design that motivates them.
 
 ---
 
@@ -716,11 +715,14 @@ pub struct AchievementDef {
 | `speed_and_skill` | ??? | Win < 90s without undo | Yes | Card back #4 |
 | `comeback` | ??? | Win after 3+ stock recycles | Yes | Background #4 |
 | `zen_winner` | ??? | Win in Zen Mode | Yes | Badge |
+| `cinephile` | Cinephile | Watch a saved replay all the way through | No | — |
 
 ### Evaluation Timing
 
 Achievement conditions are evaluated by `AchievementPlugin` on every `GameWonEvent` and `StateChangedEvent`. The plugin calls `solitaire_core::check_achievements()` which returns a `Vec<AchievementDef>` of newly unlocked achievements. The plugin then fires `AchievementUnlockedEvent` for each, which the toast and persistence systems handle independently.
 
+A small number of achievements are *event-driven* rather than condition-driven: their `AchievementDef::condition` always returns `false` and their unlock is written from a dedicated observer system instead. `cinephile` is the canonical example — it unlocks when `ReplayPlaybackState` transitions from `Playing` to `Completed` (a saved replay watched to its natural end). The Stop button transitions `Playing → Inactive` directly without entering `Completed`, so manual aborts do not unlock the achievement.
+
 ---
 
 ## 12. Progression System

CHANGELOG.md

@@ -6,7 +6,802 @@ project follows [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
-_Nothing yet._
+No threads in flight. v0.20.0 cut on 2026-05-07; CHANGELOG accumulates
+the next cycle here.
+
+## [0.20.0] — 2026-05-07
+
+Two through-lines closed: a full **Android port** (build target,
+first 54 MB APK, JNI-free per-app persistence shim) and the
+**Terminal visual-identity port** that replaces the prior
+Premium-Solitaire palette across every UI surface. The Android
+arc opened in `fb8b2ac` (compile + APK), continued in `4b51e50`
+(`solitaire_data::data_dir` shim closing the CLAUDE.md §10
+`dirs::data_dir() = None` pitfall), and is functional end-to-end
+on a real device — though the runtime artwork is still the legacy
+white-card palette, and JNI ClipboardManager / keyring bridges
+remain stubbed (matching v0.19.0's documented fallback behaviour).
+The Terminal port lands as a top-down stack: the `ui_theme` token
+API in `0d477ac` is load-bearing, and the rest of the cycle is
+downstream applications (modal scaffold, gameplay-feedback,
+toasts, table / card chrome, splash cursor, hint-highlight
+pairing). The card faces and suit-pip palette are deliberately
+NOT migrated — those track PNG artwork that hasn't been
+regenerated yet, and swapping the fallback constants ahead of the
+artwork would mix two visual systems on any code path where
+image loading fails.
+
+The 24 Stitch-rendered mockups in `docs/ui-mockups/` are now
+in-tree (`fa7f98a`); future plugin work should diff against the
+matching mockup before touching pixels.
+
+Two threads from v0.19.0's punch list also closed in this cycle:
+the pull-failure test flake (`67c150b`), the Settings opt-out for
+the smart-default window sizer (`e1b8766`), and the share-link
+discoverability surfacing (`9b065e5`). The remaining v0.19.0
+candidate — the app-icon round — stays open.
+
+### Added
+
+- **`ui_theme` Terminal design-token system** (`0d477ac`). Single
+  source of truth for the engine's visual identity:
+  base16-eighties palette (cyan primary CTA, lime/lavender/gold/
+  teal/pink semantic accents), 5-rung type scale, 7-rung 4-multiple
+  spacing scale, 3-step radius, 14-rung z-index hierarchy, full
+  motion budget, and four invariant-pinning unit tests. Every
+  downstream port commit in this cycle reads from this module —
+  swapping the palette is now a one-file edit, not a hunt across
+  ~50 plugin files. Card-shadow alphas pinned to 0 (Terminal
+  achieves depth via 1px borders + tonal layering, no
+  `box-shadow`); the rendering path is left intact so a future
+  palette can re-enable shadows without touching consumers.
+- **`ToastVariant` enum + Terminal toast styling** (`a137607`).
+  Toasts now follow `docs/ui-mockups/design-system.md`: opaque
+  `BG_ELEVATED` fill, 1px accent border keyed off
+  `Info` / `Warning` / `Error` / `Celebration` variants, 18px
+  monospaced caption (`TYPE_BODY_LG`), bottom-anchored. All ten
+  call sites pass their semantic variant: achievement / level-up
+  / XP / daily / weekly / challenge → Celebration (lavender);
+  goal-announcement / time-attack / settings volume / auto-complete
+  → Info (teal). Two regression tests pin variant→border mapping
+  to the design tokens and require all four borders to be visually
+  distinct. Queued and immediate toasts use slightly different
+  bottom anchors (6 % vs. 14 %) so a celebration toast spawned
+  alongside a queued info banner layers above it.
+- **Terminal cursor block on the splash overlay** (`cdcadda`).
+  The launch splash now renders the design system's signature
+  `▌` cyan (`ACCENT_PRIMARY`) glyph (96 px, hand-tuned literal)
+  above the wordmark, matching `docs/ui-mockups/splash-mobile.html`.
+  Cursor fades on the same per-frame alpha schedule as the title
+  and subtitle so the brand beat still dissolves as a single
+  layer. Did *not* pull in the mockup's full boot-loader treatment
+  (scanline overlay, ✓ check log, progress bar, ROOT@SOLITAIRE
+  prompt) — those are aesthetic features warranting their own
+  commit.
+- **Terminal design-system spec + 24-mockup library** (`fa7f98a`).
+  `docs/ui-mockups/design-system.md` (palette, type scale, spacing
+  scale, motion budget, component library, accessibility notes —
+  color-blind toggle, high-contrast mode, glyph differentiation,
+  canonical `"Terminal"` card-back theme) and 24 Stitch-rendered
+  mockups (HTML + PNG): 12 redesigned existing screens, 1 desktop
+  home variant, 2 onboarding steps, and 9 missing-plugin screens
+  (splash, challenge, time-attack, weekly-goals, leaderboard,
+  sync, level-up, replay, radial-menu). The spec the rest of this
+  cycle ports against; future plugin work diffs here before
+  touching pixels.
+- **Android build target — first working APK** (`fb8b2ac`).
+  `cargo apk build -p solitaire_app --target x86_64-linux-android`
+  now produces a 54 MB debug-signed APK at
+  `target/debug/apk/solitaire-quest.apk`. Five gating points
+  resolved end-to-end:
+  - **`solitaire_app` split into bin + lib.** cargo-apk needs a
+    `cdylib` to bundle as `libmain.so`; pure-bin crates panic
+    with "Bin is not compatible with Cdylib". `src/lib.rs`
+    carries the ECS bootstrap as `pub fn run`; `src/main.rs` is
+    a 3-line shim that delegates for the desktop path.
+  - **`[package.metadata.android]`** pins target SDK 34 / min
+    SDK 26 and points `assets = "../assets"` at the workspace
+    asset directory so desktop and APK share one set.
+  - **Workspace `bevy` features** add `android-native-activity`
+    (target-gated inside bevy_internal — desktop builds compile
+    it out). Pairs with cargo-apk's NativeActivity wrapper.
+  - **`arboard` target-gated** to `cfg(not(target_os =
+    "android"))`. The crate has no Android backend; cargo apk
+    fails with E0433 on `platform::Clipboard` if left
+    unconditional. Stats's "Copy share link" surfaces an
+    informational toast on Android until JNI ClipboardManager
+    lands in the Phase-Android round.
+  - **`keyring` + `keyring-core` target-gated.** Bionic doesn't
+    expose `libc::__errno_location` so the transitive
+    `rpassword` won't compile. `auth_tokens` ships an Android
+    stub returning `KeychainUnavailable` for every call —
+    matches the existing fallback for a Linux box without
+    Secret Service.
+  - Cosmetic: cargo-apk panics post-sign when it tries to also
+    wrap the bin target. The APK on disk is unaffected;
+    `cargo apk build --lib` is the small workaround.
+- **Android developer setup + build runbook** (`59424a3`).
+  Captures Debian 13 toolchain install (JDK 21, unzip, SDK
+  licence prompts), the `cargo apk build` invocation, the
+  cosmetic post-sign panic workaround, and a what-is-wired-vs-
+  stubbed table for the android target. Runnable on a fresh
+  clone — no machine-local context required.
+- **F3-toggleable FPS / frame-time overlay** (`690e1d2`).
+  `DiagnosticsHudPlugin` wraps Bevy's `FrameTimeDiagnosticsPlugin`
+  and renders a corner readout the developer toggles with F3.
+  Hidden by default; F3 is not gated by pause / modal state.
+  Reads `smoothed()` so the cell isn't a per-frame jittery
+  scoreboard. Format: `FPS NN \u{2022} M.MM ms`. Anchored
+  top-right at `z = Z_SPLASH + 100` above every modal / toast /
+  splash. Update system bails when hidden so the
+  diagnostic-store lookup is free when nobody's looking.
+- **"Smart window size" Settings toggle** (`e1b8766`). Gameplay
+  section gains an opt-out toggle for v0.19.0's
+  `apply_smart_default_window_size` system. New
+  `Settings::disable_smart_default_size: bool` with
+  `#[serde(default)]` so legacy `settings.json` files load to
+  the shipped behaviour (smart sizer enabled). `solitaire_app::main`
+  reads the flag once at startup and skips the system's
+  registration when set. Saved window geometry still wins over
+  both branches; tooltip on the row makes that explicit.
+- **"Shareable" badge on the Latest-win caption** (`9b065e5`).
+  The Stats overlay's Latest-win caption now appends
+  `\u{2022} Shareable` when the displayed replay carries a
+  populated `share_url`. Players can see at a glance whether the
+  Copy share link button will produce a URL or surface the
+  upload-prerequisite toast.
+- **Help overlay covers M / P / Win-Summary-Enter** (`35516d3`).
+  Three new rows in the Overlays section: M (Home / Mode
+  launcher), P (Profile), and the Enter accelerator that
+  dismisses the Win Summary modal. Three post-v0.18 entries
+  that had drifted out of the cheat sheet are now listed.
+
+### Changed
+
+- **Gameplay-feedback colours route through Terminal state
+  tokens** (`ceec4fc`). Selection-highlight tints in
+  `selection_plugin` and the valid-drop marker tint in
+  `cursor_plugin` were hand-tuned RGB literals. Migrated to
+  semantic state tokens: keyboard-drag picking source →
+  `ACCENT_PRIMARY` (cyan focus); keyboard-drag lifted source →
+  `STATE_WARNING` (gold attention); destination → `STATE_SUCCESS`
+  (lime valid-move); `cursor_plugin::MARKER_VALID` →
+  `STATE_SUCCESS` at 0.55 α with a tracking test pinning its RGB
+  to the token. Three stale doc comments in `ui_modal` corrected
+  ("loud yellow CTA" / "magenta secondary accent" → cyan /
+  lavender to match the actual token values).
+- **`table_plugin` chrome migration to Terminal tokens** (`651f406`).
+  `marker_colour` promoted to module-level `pub const
+  PILE_MARKER_DEFAULT_COLOUR` so `cursor_plugin::MARKER_DEFAULT`
+  imports the const directly — replaces the prior
+  duplicated literal kept in sync only by doc comment with a
+  compile-enforced invariant. The empty-tableau "K" placeholder
+  text now uses `TEXT_PRIMARY` at 0.35 α; `HINT_PILE_HIGHLIGHT_COLOUR`
+  retuned from bright `srgb(1.0, 0.85, 0.1)` to the `STATE_WARNING`
+  token (`#ddb26f`) with a tracking test, and the existing "is
+  gold" character test loosened to fit the muted Terminal gold
+  while still rejecting non-warm colours.
+- **`card_plugin` chrome migration to Terminal tokens** (`d752870`).
+  Drag-elevation shadow now sources its colour from
+  `CARD_SHADOW_COLOR` + `CARD_SHADOW_ALPHA_DRAG` so the Terminal
+  "no box-shadow" policy disables the stack shadow in lockstep
+  with the per-card shadows. `RIGHT_CLICK_HIGHLIGHT_COLOUR`
+  retuned from raw green to `STATE_SUCCESS` at 0.6 α with a
+  tracking test. The duplicated `PILE_MARKER_DEFAULT_COLOUR`
+  const dropped — this plugin now imports the promoted const
+  from `table_plugin`. Stock recycle "↺" text moved from raw
+  white-at-0.7-α to `TEXT_PRIMARY.with_alpha(0.7)`. Card-face /
+  suit / card-back palette constants were intentionally NOT
+  migrated (the runtime path renders PNG artwork that's still on
+  the previous "white card" palette).
+- **Hint-source card tint matches the destination pile**
+  (`9891ae4`). `input_plugin`'s hint-source card tint moved from
+  raw bright-yellow `srgba(1.0, 1.0, 0.4, 1.0)` to `STATE_WARNING`,
+  so the source card and the destination pile (which already uses
+  `STATE_WARNING` via `HINT_PILE_HIGHLIGHT_COLOUR`) wear the same
+  attention colour as a coherent pair.
+
+### Fixed
+
+- **`solitaire_data::data_dir` shim closes the Android persistence
+  gap** (`4b51e50`). `dirs::data_dir()` returns `None` on Android,
+  which silently disabled every persistence path (settings, stats,
+  achievements, replays, game-state, time-attack sessions, user
+  themes). New `solitaire_data::platform::data_dir()` shim falls
+  through to `dirs::data_dir()` on desktop and returns the per-app
+  sandbox at `/data/data/com.solitairequest.app/files` on Android
+  — no JNI needed, since the package id is pinned in
+  `[package.metadata.android]`. Six call sites across
+  `solitaire_data` plus `solitaire_engine/assets/user_dir.rs`
+  migrated. CLAUDE.md §10 already flagged this as a known
+  pitfall; the shim pays it down at the one chokepoint instead
+  of per feature.
+- **`card_shadow_params` test aligned with Terminal "no shadow"
+  intent** (`1d1543e`). The Terminal token system pinned both
+  `CARD_SHADOW_ALPHA_IDLE` and `CARD_SHADOW_ALPHA_DRAG` to 0.0,
+  which made the prior `drag_alpha > idle_alpha` assertion fail
+  (`0 > 0` is false). Loosened to `drag_alpha >= idle_alpha`
+  with a comment naming the new invariant: under Terminal both
+  are 0; under any future palette that re-enables shadows, drag
+  still must not be weaker than idle. The useful regression-guard
+  (catching an accidental swap of the two constants) is preserved.
+- **`pull_failure_sets_error_status` test flake** (`67c150b`).
+  The fixed 5-update budget was the last test still subject to
+  the AsyncComputeTaskPool starvation mode that v0.19.0's
+  auto-save fix already cleared. Replaced with a wall-clock-
+  bounded loop (5-second deadline, `std::thread::yield_now`
+  between iterations) that exits as soon as the status flips.
+  Mirrors the auto-save flake fix shape.
+
+### Stats
+
+- **1176 passing tests / 0 failing** across the workspace
+  (six new tests this cycle: four `ui_theme` invariant guards
+  for the type / spacing / z-index scales + `scaled_duration`,
+  one toast-variant-border-mapping pair, and four palette-
+  tracking guards on `MARKER_VALID` / `HINT_PILE_HIGHLIGHT_COLOUR`
+  / `RIGHT_CLICK_HIGHLIGHT_COLOUR` / toast-border distinctness).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
+
+## [0.19.0] — 2026-05-06
+
+Closes the v0.18.0 punch list (items B and D — async hint and
+persistent replay share URLs), expands desktop platform fit
+(Wayland session support + monitor-aware default window size for
+HiDPI / 4K displays), polishes the win-celebration and
+double-click animation paths, and clears two test-flake
+contributors. A short-lived "Rusty Pixel" pixel-art card theme
+was prototyped and reverted in the same window — the engine
+plumbing it touched (`pixel_art` field on `ThemeMeta`, PNG
+manifest face support, second `embedded://` theme channel) was
+fully reverted and is not part of this release.
+
+### Changed
+
+- **H-key hint runs on `AsyncComputeTaskPool`** (`3e11e9e`). The
+  synchronous `try_solve_from_state` call on every H press is gone;
+  `handle_keyboard_hint` now spawns a task whose result the new
+  `pending_hint::poll_pending_hint_task` system surfaces one frame
+  later. New `PendingHintTask` resource carries the in-flight handle
+  plus `move_count_at_spawn` for staleness detection;
+  `drop_pending_hint_on_state_change` cancels the task whenever the
+  game state shifts; `PendingHintTask::spawn` implements
+  cancel-on-replace so two quick H presses keep at most one task in
+  flight. Mirrors the v0.18.0 `PendingNewGameSeed` template.
+  `emit_hint_visuals` and `find_heuristic_hint` are extracted as
+  `pub` helpers so the polling system can call them.
+- **Persistent replay share URLs** (`42d90b1`). v0.18.0's
+  `LastSharedReplayUrl` was an in-memory resource wiped on quit —
+  the player had to share within the session of the win.
+  `solitaire_data::Replay` now carries a `share_url: Option<String>`
+  field with `#[serde(default)]` (no `REPLAY_SCHEMA_VERSION` bump
+  needed; older `replays.json` files load unchanged with `share_url
+  == None` on every entry). `poll_replay_upload_result` writes the
+  resolved URL into `replays[0].share_url` and persists the updated
+  history via `save_replay_history_to`. The Stats overlay's
+  "Copy share link" button reads from
+  `history.0.replays[selected.0].share_url`, so the Prev/Next
+  selector's currently-displayed replay drives the clipboard
+  contents — each historical win keeps its own URL.
+  `LastSharedReplayUrl` removed (its role is now subsumed by the
+  `share_url` field on the replay record).
+
+### Added
+
+- **Wayland session support** (`b57db01`). The workspace
+  `Cargo.toml` Bevy feature list now enables `wayland` alongside
+  `x11`. winit prefers Wayland when `WAYLAND_DISPLAY` is set on the
+  session, falling back to X11 when it isn't. Pre-fix, a Wayland
+  desktop environment fell through to XWayland, rendering the
+  game inside an X11 frame stitched into the Wayland compositor.
+  Post-fix, the game opens as a native Wayland surface. Costs a
+  few hundred KB of binary for the libwayland-client bindings;
+  cross-distro friendly because winit dlopen-probes the libraries
+  rather than hard-linking them.
+- **Monitor-relative default window size** (`b57db01`). On launches
+  with no saved geometry, the new
+  `apply_smart_default_window_size` Update system queries
+  `Monitor` (with the `PrimaryMonitor` marker) and resizes the
+  primary window to ~70 % of the monitor's *logical* size on the
+  first frame. Before, every fresh launch opened at 1280×800
+  regardless of monitor; on a 4K monitor that's a comparatively
+  tiny window in one corner. Logical size already accounts for
+  the OS's HiDPI scale factor, so a Retina display reporting
+  scale_factor 2.0 yields the same physical inches as a 1080p
+  display reporting 1.0. Skipped entirely when saved geometry was
+  applied — the player's chosen size always wins.
+
+### Fixed
+
+- **Duplicate "You Win" toast on game-won** (`55c235b`). The
+  post-win UI was firing two celebration surfaces: a 4-second
+  toast banner ("You Win! Score: X Time: Y") on top of the
+  `win_summary_plugin`'s "You Won!" modal. In screenshots the
+  toast banner was partially clipped behind the modal card,
+  peeking out on either side. The toast predated the modal and is
+  strictly subsumed by it; removed. The cards-fly-off cascade
+  animation (`MotionCurve::Expressive` per-card rotation drift)
+  is unchanged — that's the visual celebration, distinct from
+  the textual celebration the modal owns. `WIN_TOAST_SECS` const
+  removed.
+- **Double-click on a single card with no destination now plays
+  the reject animation** (`d7ffb16`). `handle_double_click` only
+  fired `MoveRejectedEvent` for multi-card stacks with no
+  destination; a double-click on a single card whose top didn't
+  fit any foundation or tableau slot produced zero feedback —
+  no `card_invalid.wav`, no source-pile shake. Both priorities'
+  failure paths now converge on a single rejection at the end of
+  the double-click branch, so single-card and stack misses get
+  the same feedback shape as drag-and-drop rejections.
+- **Double-click move animation no longer plays twice**
+  (`6037596`). On a successful double-click, the slide-to-
+  destination animation rendered twice — once from the move's
+  `StateChangedEvent` landing, then again from the release's
+  `end_drag` firing a redundant `StateChangedEvent` mid-slide.
+  `sync_cards_on_change` saw the card mid-CardAnim (`cur ≠
+  target`) and replaced the in-flight tween with a fresh one
+  starting at the mid-position, visibly restarting the slide. The
+  defensive `StateChangedEvent` write in `end_drag`'s
+  uncommitted-drag branch is removed; `start_drag` only mutates
+  `DragState` (never card transforms), so an uncommitted drag
+  has no visual side effect to undo. The committed-drag branch
+  keeps its `StateChangedEvent` since real drag snap-backs do
+  need a resync.
+- **`auto_save_writes_after_30_seconds` test flake** (`91b7605`).
+  The test's single-frame `app.update()` was sensitive to
+  first-frame `Time::delta_secs()` variance under heavy parallel
+  cargo-test load, and to production-disk
+  `~/.local/share/solitaire_quest/game_state.json` state leaking
+  into the test world via `GamePlugin::build`'s load path.
+  `test_app` now resets `PendingRestoredGame(None)` after plugin
+  build (preventing the dev machine's saved-game state from
+  tripping the auto-save guard) and the test re-arms the timer in
+  a small bounded loop until the file appears (robust against
+  first-frame Time variance). No production-code change.
+
+### Stats
+
+- 1170 passing tests (was 1166 at v0.18.0 close — net +4 from
+  the persistent share URL backwards-compat test, the three
+  async-hint tests, minus the dropped synchronous hint tests).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
+
+## [0.18.0] — 2026-05-06
+
+The launch-experience round. The engine used to drop the player on a
+silent default Classic deal whether they had unfinished work or not;
+v0.18.0 replaces that with two stacked decision points — a Restore
+prompt for in-progress saves, then an MSSC-style Home / mode picker
+that surfaces Daily / Zen / Challenge / Time Attack as picture tiles
+with live stats. The same round closes the last solver-on-main-thread
+hot path (winnable-only seed selection moves to
+`AsyncComputeTaskPool`), wires "Copy share link" into Stats, lights a
+"Won before" HUD chip on re-deals of beaten seeds, and tidies the
+unified-3.0 rule set across CLAUDE.md / CLAUDE_SPEC.md /
+CLAUDE_WORKFLOW.md / CLAUDE_PROMPT_PACK.md.
+
+### Added
+
+- **Restore prompt on launch** (`3c7a0eb`). When `game_state.json`
+  holds an in-progress game (`move_count > 0`, not won), the engine
+  now seeds `GameStateResource` with a fresh deal and holds the saved
+  game in a new `PendingRestoredGame` resource. After the splash
+  clears, a "Welcome back" modal offers **Continue** (Enter / C /
+  click) or **New game** (N / click). Fresh-deal saves
+  (`move_count == 0`) skip the prompt and load directly.
+- **Save preservation while the prompt is unanswered** (`f863d85`).
+  Both `save_game_state_on_exit` and `auto_save_game_state` consult
+  `PendingRestoredGame` first: if it still holds a pending saved
+  game, that's what gets persisted (or the auto-save is skipped),
+  so exiting before answering the prompt no longer overwrites the
+  meaningful save with the placeholder fresh deal.
+- **Home / mode picker auto-shows on launch** (`dd63261`). The mode
+  picker was only reachable via **M** during gameplay; players who
+  hadn't discovered the hotkey never saw the Daily / Zen / Challenge
+  / Time Attack entry points after the splash cleared. `HomePlugin`
+  gains an `auto_show_on_launch` flag (default true) and a
+  one-shot `LaunchHomeShown` gate. Skips when the Restore prompt is
+  on screen so Welcome-back still takes precedence.
+- **MSSC-style Home picker — header / chips / score chips / draw
+  mode** (`ae40a1d`). Player-stats header strip (Level / XP /
+  Lifetime Score, compact-formatted as `1.2M` / `12.3K` / `1,234`)
+  acts as a clickable shortcut to Profile. Draw-mode chip row above
+  the mode cards lets the player flip Draw 1 / Draw 3 from the
+  picker itself; persists `settings.json` and respawns the modal so
+  the active state repaints cleanly. Per-mode best-score / streak
+  chips on each card; hidden on a 0 best so a fresh profile doesn't
+  read "Best 0" everywhere.
+- **Today's Event callout on the Daily card** (`b73d246`). "Today,
+  May 6" date line plus the server-fetched goal (when SyncPlugin is
+  wired). Once today's daily is recorded as completed, the date
+  flips to `Today, May 6 • Done` in `ACCENT_PRIMARY` so the picker
+  reads as a reward state rather than a TODO.
+- **Picture-tile mode cards** (`9fe650f` + glyph-picking follow-ups
+  `40d6e0a`, `c30b04e`, `d065d49`). Mode cards become a wrapping
+  2-up grid (`FlexWrap::Wrap`, tiles 48 % wide, `min_height: 180px`)
+  with a centred Unicode-glyph centrepiece per tile. Final glyph set
+  picked from FiraMono-Medium's actual coverage: ♣ Classic, ◆ Daily,
+  ○ Zen, ▲ Challenge, → TimeAttack. `ACCENT_PRIMARY` when the mode is
+  unlocked, `TEXT_DISABLED` when locked. Centrepiece is a `Text` node
+  for now — when real per-mode artwork lands, swap to `Image` without
+  touching tile layout, focus order, or chip rendering.
+- **Solver-vetted seed selection on `AsyncComputeTaskPool`**
+  (`d489e7a`). Closes the worst-case 6 s UI stall on a New Game
+  click with "Winnable deals only" enabled. New `PendingNewGameSeed`
+  resource holds the in-flight `Task<u64>` plus the original
+  request's `mode` / `confirmed` flags. `poll_pending_new_game_seed`
+  runs `.before(GameMutation)` and replays a synthetic
+  `NewGameRequestEvent` once the task resolves — the player sees no
+  extra-frame visual lag. Cancel-on-replace: a fresh
+  `NewGameRequestEvent` while a task is in flight drops the old
+  task, letting Bevy's `Task` Drop cancel cooperatively at the next
+  await point.
+- **"Won before" HUD indicator** (`bdac754`). When the current
+  deal's `(seed, draw_mode, mode)` triple matches an entry in the
+  rolling `ReplayHistory`, the HUD's tier-2 context row shows
+  **✓ Won before** in `STATE_SUCCESS`. Cleared on win (the on-screen
+  victory cue is enough) and on first-time deals. New
+  `HudWonPreviously` marker driven by a separate
+  `update_won_previously` system; gracefully no-ops in headless
+  tests that don't load `StatsPlugin`.
+- **"Copy share link" Stats button** (`540869c`). End-to-end replay
+  sharing on a server-backed sync backend:
+  `sync_plugin::push_replay_on_win` spawns the upload on
+  `AsyncComputeTaskPool` and stores the handle in
+  `PendingReplayUpload` (drops any in-flight predecessor — the most
+  recent win is what the player wants the link for);
+  `poll_replay_upload_result` writes `<server>/replays/<id>` to
+  `LastSharedReplayUrl` on success; the Stats overlay's action bar
+  gains a button that writes the URL to the OS clipboard via
+  `arboard` and surfaces a "Copied: \<url\>" toast. URL is in-memory
+  only — sharing must happen within the session of the win.
+- **Empty-state copy + onboarding hints** (`56e2e6f`). Leaderboard
+  empty state: two-tier "Be the first on the leaderboard." headline
+  + body invite. Achievements panel: first-launch hint above the
+  grid until the first unlock. Volume hotkeys (`[` / `]`) now emit
+  an `InfoToastEvent` with the new percentage so off-panel
+  adjustments give visible feedback (previously silent).
+- **Enter dismisses the Win Summary and starts a fresh deal**
+  (`17e0737`). The post-win modal's "Play Again" was click-only;
+  keyboard-only players had to reach for the mouse to leave the
+  celebration screen. The button label gains a trailing return-key
+  glyph so the keyboard path is discoverable on first sight.
+- **`N` opens the real Confirm/Cancel modal** (`93660c2`). The old
+  "Press N again" double-tap pattern was a UI-first violation (only
+  continuation was another keystroke). `N` now fires
+  `NewGameRequestEvent::default()` directly; `handle_new_game`'s
+  active-game check spawns the existing `ConfirmNewGameScreen`. The
+  HUD button already routed through the same modal — keyboard and
+  mouse paths are unified. `Shift+N` keeps the keyboard power-user
+  bypass (`confirmed: true`).
+
+### Changed
+
+- **Settings row layout** (`a4bc063`). All five
+  slider/toggle row helpers (volume × 2, tooltip delay, time-bonus
+  multiplier, replay-move interval, generic toggle) restructured to
+  a label-spacer-cluster layout (`width: 100%`, label gets
+  `flex-grow: 1`, controls cluster sits flush right). Stable across
+  varying value-text widths ("0.80" → "1.00", "Instant" vs "1.5 s")
+  and narrow windows.
+- **Docs adopt the unified-3.0 rule set** (`f2f30c8`). `CLAUDE.md`
+  grows from a 114-line pointer doc to a 571-line rulebook (hard
+  global constraints §2, engine rules §3, asset rules §4, code
+  standards §5, build + verification §6, git workflow §7, the ASK
+  BEFORE list §8, Context Injection System §14). New companions:
+  `CLAUDE_SPEC.md` (formal architecture spec — crate dependency
+  graph, data ownership, state-machine invariants, sync merge /
+  server contracts, validation checklist),
+  `CLAUDE_WORKFLOW.md` (two-agent Builder/Guardian pipeline with
+  hard-fail patterns), `CLAUDE_PROMPT_PACK.md` (task-type
+  templates). Three duplicate rule passages removed across
+  `CLAUDE_SPEC.md` and `ARCHITECTURE.md`.
+- **Test discipline pruning** (`a49a340`). Removed 43 low-value
+  tests across `solitaire_data` and `solitaire_core` (default-value
+  tests, serde-derive round-trips on plain structs, single-field
+  clamp tests, near-duplicates, constant-equals-itself tests). None
+  pinned a behaviour contract or a regression on a real bug. Future
+  agent briefs request tests for behaviour contracts or real-bug
+  regressions, not a count of N.
+
+### Fixed
+
+- **Esc on a modal no longer opens Pause underneath** (`08b006f`).
+  A single Esc press on Confirm New Game / Restore / Home /
+  Onboarding / Settings used to both close the modal and spawn the
+  Pause overlay on top in the same frame. `toggle_pause` now skips
+  when any non-Pause `ModalScrim` is in the world; the HUD-button
+  path is gated too. The four modal queries are bundled into a
+  `PauseModalQueries` `SystemParam` to stay under Bevy's
+  16-parameter cap.
+- **Esc dismisses Home / accepts the Restore-prompt default**
+  (`d48b948`). Both screens previously ignored Esc, leaving the
+  player no keyboard-only escape after the previous fix. Home: Esc
+  behaves like Cancel (despawns the modal, keeps the underlying
+  default deal). Restore: Esc maps to Continue (preserves the saved
+  game, matching how the primary action already advertises Enter).
+- **Esc dismisses the topmost modal when Profile stacks on Home**
+  (`9aa0dd2`). Clicking the Home header chip opens Profile on top
+  of Home; Esc used to close Home (because
+  `handle_home_cancel_button` fired with no awareness of layered
+  modals) and leave Profile orphaned over the game.
+  `profile_plugin` now splits P/button (toggle) from Esc
+  (close-only); `handle_home_cancel_button` skips its Esc branch
+  when any other `ModalScrim` exists.
+- **Restore-prompt resolution suppresses Home auto-show**
+  (`b7c3a49`). Resolving the Welcome-back prompt cleared
+  `PendingRestoredGame` and despawned the modal, but the
+  launch-time Home auto-show then fired the next frame and stacked
+  itself over the player's chosen path. `LaunchHomeShown` becomes
+  `pub` so `handle_restore_prompt` flips it to `true` after either
+  resolution; **M** still re-opens the picker on demand.
+- **Game timers freeze while the Home picker is up** (`c497c31`).
+  The HUD's elapsed-time counter ticked from the moment the default
+  Classic deal landed at startup, even though the auto-show Home
+  picker was still up — the player saw "0:11" before they had
+  chosen a mode. `tick_elapsed_time` and `advance_time_attack` now
+  also gate on the absence of `HomeScreen`, mirroring their
+  existing `PausedResource` check.
+- **Popover rows stay visible regardless of action-bar fade**
+  (`cc63532`). Opening Modes / Menu showed a solid dark-purple
+  block in the top-right with no readable content — the action-bar
+  auto-fade was matching the popover rows by their shared
+  `ActionButton` marker and dropping their alpha to the
+  cursor-position-based fade value (typically 0). New `PopoverRow`
+  marker on rows in `spawn_modes_popover` / `spawn_menu_popover`;
+  `apply_action_fade` excludes them via `Without<PopoverRow>`.
+
+### Stats
+
+- 1166 passing tests (was 1208 at v0.17.0 close — 43 net removals
+  from the test-discipline prune plus 1 net-new test from the
+  async-seed work, no behaviour regressions).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
+
+## [0.17.0] — 2026-05-06
+
+A short follow-up round on top of v0.16.0: the H-key hint is no
+longer a heuristic guess but the actual best first move suggested by
+the v0.15.0 solver, and the in-engine replay player now has a
+player-tunable playback rate.
+
+### Added
+
+- **Replay-rate slider** in Settings → Gameplay. Tunes
+  `replay_move_interval_secs` from 0.10 s to 1.00 s in 0.05 s steps;
+  default 0.45 s. `tick_replay_playback` reads the value from
+  `SettingsResource` per frame so the slider takes effect on the
+  next playback tick — no restart required.
+
+### Changed
+
+- **Solver-driven hints.** Pressing **H** used to surface a
+  heuristic-best move (foundation moves preferred, then
+  tableau-to-tableau by depth-of-flip-revealed). It now asks the
+  v0.15.0 solver for the actual provably-best first move via the
+  new `solitaire_core::solver::try_solve_with_first_move` /
+  `try_solve_from_state` APIs. When the solver returns inconclusive
+  (rare deals where the bound runs out before a result), the old
+  heuristic remains the fallback. Median 2 ms per H press.
+
+### Stats
+
+- 1208 passing tests (was 1196 at v0.16.0 close).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
+
+## [0.16.0] — 2026-05-06
+
+A modal-feel polish round. Every overlay screen now scrolls when its
+content overflows the 800×600 minimum window, every clickable button
+shows a hand cursor on hover, keyboard focus lands on the primary
+button on the same frame the modal opens, and read-only modals
+dismiss when the player clicks the scrim outside the card.
+
+### Added
+
+- **Pointer cursor on hover** for every interactive `Button` entity
+  (modal buttons, HUD action bar, mode-launcher cards, settings
+  toggles, Stats selectors). `update_cursor_icon` gains a fourth
+  branch sitting between Grabbing (active drag) and Grab
+  (draggable card hover): when no drag is active and any
+  `Interaction::Hovered`/`Pressed` button is detected, the window
+  cursor swaps to `SystemCursorIcon::Pointer`. A pure
+  `pick_cursor_icon` helper makes the priority logic
+  unit-testable.
+- **Click-outside-to-dismiss** for the six read-only modals: Stats,
+  Achievements, Help, Profile, Leaderboard, Home. New
+  `ScrimDismissible` marker on `ModalScrim` opts a modal in;
+  `dismiss_modal_on_scrim_click` runs in `Update`, despawns the
+  topmost dismissible scrim on a left-mouse press whose cursor
+  lands on the scrim and outside every `ModalCard`. Bevy's
+  hierarchy despawn cascades to the card and children.
+  Settings, Onboarding, Pause, Forfeit confirm, and Confirm New
+  Game intentionally don't opt in — they carry unsaved or
+  destructive state.
+
+### Fixed
+
+- **Modal content scrolls when it overflows** (Achievements, Help,
+  Stats, Profile, Leaderboard). Each modal's body Node now
+  carries `Overflow::scroll_y()` plus a `max_height` constraint
+  (`Val::Vh(70.0)` for most, `Val::Vh(50.0)` for the
+  leaderboard's variable-length ranking section) and a marker
+  component (`AchievementsScrollable`, `HelpScrollable`,
+  `StatsScrollable`, `ProfileScrollable`,
+  `LeaderboardScrollable`). A sibling `scroll_*_panel` system
+  per modal routes `MouseWheel` events into the body's
+  `ScrollPosition`. Mirrors the existing `SettingsPanelScrollable`
+  pattern. Home modal intentionally not scrolled — its five
+  mode cards + Cancel are sized to fit at 800×600 by design.
+- **Modal focus arrives on the same frame the modal opens.**
+  Previously `attach_focusable_to_modal_buttons` and
+  `auto_focus_on_modal_open` ran in `Update` alongside arbitrary
+  click-handlers that spawn modals; with no ordering edge,
+  Bevy's deferred `Commands` queued the new entities but the
+  attach system couldn't see them on the same tick. Both systems
+  moved to `PostUpdate` so the schedule boundary itself supplies
+  the sync point — `FocusedButton` is always populated before
+  `app.update()` returns. The very next Tab/Enter press lands on
+  a populated resource instead of wasting itself moving focus
+  from None to the primary.
+
+### Stats
+
+- 1196 passing tests (was 1178 at v0.15.0 close).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
+
+## [0.15.0] — 2026-05-02
+
+In-engine replay playback, the Klondike solver + "Winnable deals
+only" toggle, a 19th achievement, rolling replay history, and a
+significant build-time / binary-size win from disabling Bevy's
+default audio stack.
+
+### Added
+
+- **In-engine replay playback** for the Stats overlay's Watch Replay
+  button. New `ReplayPlaybackPlugin` runs a state machine
+  (Inactive / Playing / Completed) that resets the live game to the
+  recorded deal and ticks through `replay.moves` at
+  `REPLAY_MOVE_INTERVAL_SECS` (0.45 s) firing the canonical
+  `MoveRequestEvent` / `DrawRequestEvent` per recorded move.
+  Recording is suppressed during playback so replays don't re-record
+  themselves.
+- **Replay overlay banner** (`ReplayOverlayPlugin`) anchored to the
+  top of the window during playback. Shows "Replay" label, "Move N
+  of M" progress, and a Stop button. Z-order leaves modals
+  (Settings, Pause, Help) free to render on top so the player can
+  adjust audio mid-replay.
+- **Rolling replay history** at `<data_dir>/replays.json` capped at
+  8 entries. Replaces the single-slot `latest_replay.json` (legacy
+  file is migrated forward on first launch via
+  `migrate_legacy_latest_replay`). Stats overlay gains a Prev / Next
+  selector and a "Replay N / M" caption so the player can revisit
+  older wins.
+- **"Cinephile" achievement** (#19). Unlocks the first time
+  `ReplayPlaybackState` transitions Playing → Completed (i.e. the
+  replay played out to its end without the player pressing Stop).
+  Stop transitions Playing → Inactive directly so it doesn't count.
+- **Klondike solver** in `solitaire_core::solver`. Iterative-DFS
+  with memoisation on a 64-bit canonical state hash, two budget
+  knobs (move_budget + state_budget) for pathological cases, and a
+  three-state `SolverResult` (Winnable / Unwinnable / Inconclusive).
+  Median solve time 2 ms; pathological inconclusives cap near
+  120 ms. Pure logic — `solitaire_core` keeps no Bevy or I/O.
+- **"Winnable deals only" toggle** in Settings → Gameplay (default
+  off). When on, `handle_new_game` walks seed N, N+1, N+2, …
+  through `try_solve` until it finds Winnable or Inconclusive,
+  capped at `SOLVER_DEAL_RETRY_CAP` (50) attempts. Daily
+  challenges, replays, and explicit-seed requests bypass the
+  solver — only random Classic deals are gated.
+
+### Changed
+
+- **Bevy default-feature trim** (`bevy = { default-features = false,
+  features = [...] }` in workspace Cargo.toml) drops 51 transitive
+  crates including the `bevy_audio` → rodio → cpal 0.15 + symphonia
+  chain that the project doesn't use (kira handles audio directly).
+  The retained feature list is curated to exactly what the engine
+  uses; `solitaire_wasm` is unaffected because it doesn't depend on
+  bevy.
+
+### Stats
+
+- 1178 passing tests (was 1134 at v0.14.0 close).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
+
+## [0.14.0] — 2026-05-02
+
+Two threads land in v0.14.0: the second half of the post-v0.12.0 UX
+candidate list (theme thumbnails, daily-challenge calendar, Time Attack
+auto-save, per-mode bests, time-bonus multiplier) plus a **major new
+feature** — the replay pipeline (record → upload → web viewer). Three
+Quat-reported bugs from a smoke-test round shipped alongside.
+
+### Added
+
+- **Theme-picker thumbnails** in Settings → Cosmetic. Each theme chip
+  renders a small Ace-of-Spades + back preview pair via the existing
+  `rasterize_svg` path. Cached per theme in a new
+  `ThemeThumbnailCache`. Themes that lack a preview SVG fall back to
+  a transparent placeholder rather than crashing.
+- **14-day daily-challenge calendar** in the Profile modal. Horizontal
+  row of dots showing the trailing two weeks; today's dot is ringed
+  in `ACCENT_PRIMARY`, completed days fill `STATE_SUCCESS`, missed
+  days fill `BG_ELEVATED`. Caption above the row reads "Current
+  streak: N · Longest: M".
+- **Time Attack session auto-save** to `<data_dir>/time_attack_session.json`,
+  atomic .tmp + rename. 30-second auto-save while a session is active,
+  plus on `AppExit`. Sessions whose 10-minute window expired in real
+  time while the app was closed are discarded on load. Classic, Zen,
+  and Challenge already auto-saved correctly via `game_state.json` —
+  Time Attack was the only mode missing session-level persistence.
+- **Per-mode best-score and fastest-win readouts** in the Stats screen.
+  `StatsSnapshot` gains six `#[serde(default)]` fields (Classic / Zen
+  / Challenge × best_score + fastest_win_seconds). Stats screen renders
+  a "Per-mode bests" section between the primary cell grid and
+  progression. Lifetime totals continue to roll all modes together.
+- **Time-bonus multiplier slider** in Settings → Gameplay (0.0–2.0,
+  0.1 steps, default 1.0, "Off" label at zero). Cosmetic only —
+  multiplies the time-bonus shown in the win modal but does NOT
+  affect achievement unlock thresholds (those still use the raw
+  unmultiplied score).
+- **Win-replay recording + storage.** Every move during a successful
+  game appends to a `RecordingReplay` resource; on `GameWonEvent`
+  the recording freezes into a `Replay` (seed + draw_mode + mode +
+  score + time + ordered move list) and persists to
+  `<data_dir>/latest_replay.json` atomically. Single-slot — overwrites
+  on every win.
+- **"Watch replay" button** in the Stats overlay. Shows the latest
+  win's caption and surfaces a button that loads the replay (button
+  fires an `InfoToastEvent` describing the replay; full in-engine
+  playback is deferred to a future build).
+- **Replay upload + fetch endpoints** on the server. `POST /api/replays`
+  accepts a `Replay` JSON; `GET /api/replays/:id` returns it. JWT-gated
+  with the existing auth middleware. Engine uploads winning replays
+  automatically when the player has cloud sync configured.
+- **`solitaire_wasm` crate** — new workspace member compiling
+  replay-relevant `solitaire_core` types to WebAssembly so a
+  browser can re-execute a replay client-side. No-std-friendly
+  surface; `wasm-bindgen` glue.
+- **Web replay viewer** served from the Solitaire server.
+  `GET /replays/:id` returns HTML + CSS + the wasm bundle that
+  fetches the replay JSON, rasterises a deal from the seed, and
+  animates the recorded moves.
+- **Card flight animations on the web side** so the browser viewer
+  reads as a real game replay rather than a static dump.
+
+### Fixed
+
+- **Multi-card lift validation.** `solitaire_core::rules::is_valid_tableau_sequence`
+  rejects a moved stack whose adjacent cards don't form a descending
+  alternating-colour run. Previously a player could lift any
+  multi-card selection and drop it as long as the bottom landed
+  legally. Wired into `move_cards`'s tableau-destination branch.
+- **Softlock detection.** `has_legal_moves` rewritten to walk every
+  potential move source (every stock card, every waste card, the
+  face-up top of every tableau column) and check it against every
+  foundation and every tableau. Previously the heuristic
+  early-returned `true` whenever stock had cards — players got
+  stuck in unwinnable end-states with no end-game screen.
+  `GameOverScreen` now actually fires for true softlocks. Quat's
+  exact reproduction case is pinned by a new test.
+- **Deal-tween information leak.** New-game now snaps every card
+  sprite to the stock pile position before writing
+  `StateChangedEvent`, so all 52 cards animate from a single point
+  during the deal. Previously the sprites started from their
+  previous-game positions, briefly revealing the prior deal.
+
+### Documentation
+
+- `SESSION_HANDOFF.md` refreshed for the Quat smoke-test round
+  including investigation findings on solver decisions and
+  dependency duplicates.
+
+### Stats
+
+- 1134 passing tests (was 1053 at v0.13.0 close).
+- Zero clippy warnings under `--workspace --all-targets -- -D warnings`.
 
 ## [0.13.0] — 2026-05-02
 
@@ -312,7 +1107,10 @@ with no PNG artwork yet.
   CREDITS.md, persistent window geometry, mode-launcher Home repurpose,
   client-side sync round-trip integration tests.
 
-[Unreleased]: https://github.com/funman300/Rusty_Solitaire/compare/v0.13.0...HEAD
+[Unreleased]: https://github.com/funman300/Rusty_Solitaire/compare/v0.16.0...HEAD
+[0.16.0]: https://github.com/funman300/Rusty_Solitaire/compare/v0.15.0...v0.16.0
+[0.15.0]: https://github.com/funman300/Rusty_Solitaire/compare/v0.14.0...v0.15.0
+[0.14.0]: https://github.com/funman300/Rusty_Solitaire/compare/v0.13.0...v0.14.0
 [0.13.0]: https://github.com/funman300/Rusty_Solitaire/compare/v0.12.0...v0.13.0
 [0.12.0]: https://github.com/funman300/Rusty_Solitaire/compare/v0.11.0...v0.12.0
 [0.11.0]: https://github.com/funman300/Rusty_Solitaire/compare/v0.10.0...v0.11.0

CLAUDE.md

@@ -1,114 +1,571 @@
-# Solitaire Quest — Claude Code Instructions
+# CLAUDE.md
 
-See @ARCHITECTURE.md for full project design, crate responsibilities, data models, and API reference.
+version: unified-3.0
 
 ---
 
-## Project Layout
+# 0. Role of This File
 
-```text
+This document defines:
-solitaire_core/    # Pure Rust game logic — NO Bevy, NO network, NO I/O
+
-solitaire_sync/    # Shared API types — NO Bevy, serde/uuid/chrono only
+* **Execution rules (what Claude must do)**
-solitaire_data/    # Persistence + SyncProvider trait + server client
+* **System constraints (what Claude must never violate)**
-solitaire_engine/  # Bevy ECS systems, components, plugins
+* **Operational architecture (how code is structured)**
-solitaire_server/  # Axum sync server binary
+
-solitaire_app/     # Thin binary entry point
+For full system design details:
-assets/            # Source assets — embedded at compile time via include_bytes!()
+→ `ARCHITECTURE.md` (authoritative source of truth)
+
+This file overrides all conversational assumptions.
+
+---
+
+# 1. System Architecture (Authoritative Mapping)
+
+## 1.1 Crates
+
+```text id="crate_map"
+solitaire_core/    # PURE logic (no IO, no Bevy, deterministic)
+solitaire_sync/    # Shared API + merge logic
+solitaire_data/    # Persistence + sync client
+solitaire_engine/  # Bevy ECS + UI + gameplay orchestration
+solitaire_server/  # Axum backend (optional sync layer)
+solitaire_app/     # Entry binary
+assets/            # Runtime assets (except audio)
 ```
 
 ---
 
-## Build & Test Commands
+## 1.2 Architecture Source of Truth
 
-```bash
+* Full system design: `ARCHITECTURE.md`
-# Dev run (fast compile via dynamic linking)
+* This file NEVER redefines system design
-cargo run -p solitaire_app --features bevy/dynamic_linking
+* This file ONLY enforces behavior
 
-# Release build
+---
-cargo build --workspace --release
 
-# All tests — MUST pass before any commit
+# 2. Hard Global Constraints (NON-NEGOTIABLE)
+
+These override all other instructions.
+
+## 2.1 Core Determinism
+
+* `solitaire_core` MUST:
+
+  * be deterministic
+  * be side-effect free
+  * never depend on Bevy / IO / async
+
+---
+
+## 2.2 Sync Isolation
+
+* `solitaire_sync`:
+
+  * no Bevy
+  * no IO
+  * no engine dependencies
+* merge logic must be pure functions only
+
+---
+
+## 2.3 Error Policy
+
+* NO `unwrap()`
+* NO `panic!()` in runtime/game logic
+* All state transitions:
+
+```rust id="err_model"
+Result<T, MoveError>
+```
+
+---
+
+## 2.4 Threading Rules
+
+* Sync must run on `AsyncComputeTaskPool`
+* NEVER block Bevy main thread
+
+---
+
+## 2.5 Persistence Rules
+
+* atomic writes only:
+
+  * write `.tmp`
+  * rename atomically
+* no partial state writes allowed
+
+---
+
+## 2.6 Security Rules
+
+* credentials ONLY via `keyring`
+* NEVER store secrets in:
+
+  * files
+  * logs
+  * source code
+
+---
+
+## 2.7 Sync System Rules
+
+* All sync backends implement:
+
+```rust id="sync_trait"
+trait SyncProvider
+```
+
+* `SyncPlugin` MUST be backend-agnostic
+* NEVER match on backend inside ECS systems
+
+---
+
+# 3. Engine Rules (Bevy Layer)
+
+## 3.1 ECS Design
+
+* systems = single responsibility
+* communication = Events only
+* shared state = Resources only
+* per-entity state = Components only
+
+---
+
+## 3.2 Game State Authority
+
+* ONLY `GameStateResource` can mutate game state
+* UI systems MUST NOT directly modify core logic
+
+---
+
+## 3.3 UI-First Constraint (CRITICAL)
+
+Every player action MUST:
+
+* have a visible UI control
+* NOT rely solely on keyboard shortcuts
+
+Keyboard shortcuts are:
+→ optional accelerators only
+
+---
+
+## 3.4 Layout System
+
+* recompute on `WindowResized`
+* no fixed resolution assumptions
+
+---
+
+# 4. Asset System Rules
+
+## 4.1 Runtime Assets (AssetServer)
+
+Loaded via:
+
+* `CardImageSet`
+* `BackgroundImageSet`
+* `FontResource`
+
+Includes:
+
+* cards
+* backgrounds
+* fonts
+
+---
+
+## 4.2 Embedded Assets
+
+Only audio:
+
+```text id="audio_rule"
+include_bytes!()
+```
+
+---
+
+## 4.3 Test Compatibility Rule
+
+All asset loaders MUST accept:
+
+```rust id="asset_fallback"
+Option<Res<AssetServer>>
+```
+
+Must degrade gracefully under `MinimalPlugins`.
+
+---
+
+# 5. Code Standards
+
+## 5.1 Error Handling
+
+* use `thiserror`
+* no `Box<dyn Error>` in libraries
+
+---
+
+## 5.2 Public API Rules
+
+* prefer `Into<T>` over concrete types
+* all public items require doc comments
+
+---
+
+## 5.3 Derive Order
+
+```rust id="derive_order"
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+```
+
+---
+
+## 5.4 Performance Rules
+
+* NO `clone()` in hot paths
+* profile before optimizing
+
+---
+
+## 5.5 SQL Rules
+
+* ONLY `sqlx::query!`
+* NO raw SQL strings
+
+---
+
+# 6. Build & Verification Rules
+
+These are mandatory before ANY commit.
+
+```bash id="build_rules"
 cargo test --workspace
-
-# Lint — MUST pass clean (zero warnings)
 cargo clippy --workspace -- -D warnings
-
-# Run sync server locally
-cargo run -p solitaire_server
-
-# Check a single crate
-cargo test -p solitaire_core
-cargo clippy -p solitaire_core -- -D warnings
 ```
 
 ---
 
-## Hard Rules
+# 7. Git Workflow Rules
 
-- `solitaire_core` and `solitaire_sync` must never gain Bevy or network dependencies.
+## Commit format
-- No `unwrap()` or `panic!()` in game logic. All state transitions return `Result<_, MoveError>`.
+
-- Audio assets are embedded at compile time using `include_bytes!()` in `audio_plugin.rs`.
+```text id="commit_fmt"
-- Card faces (52 PNGs in `assets/cards/faces/`), card backs (`assets/cards/backs/back_N.png`), board backgrounds (`assets/backgrounds/bg_N.png`), and the UI font (`assets/fonts/main.ttf`) are loaded at runtime via `AssetServer::load()` and stored as `Handle<Image>`/`Handle<Font>` in the `CardImageSet`, `BackgroundImageSet`, and `FontResource` resources. The `assets/` directory must ship alongside the binary.
+type(scope): description
-- Asset-loading systems take `Option<Res<AssetServer>>` so they degrade cleanly under `MinimalPlugins` (tests). When `CardImageSet` is absent, `card_plugin` falls back to a `Text2d` rank+suit overlay; when `BackgroundImageSet` is absent, the board falls back to a solid colour.
+```
-- Atomic file writes only: write to `filename.json.tmp`, then `rename()`.
+
-- Passwords and tokens are stored in the OS keychain via the `keyring` crate — never in plaintext files or logs.
+Examples:
-- Sync runs on `AsyncComputeTaskPool` — never block the Bevy main thread.
+
-- All sync backends implement the `SyncProvider` trait. The `SyncPlugin` is backend-agnostic — never `match` on `SyncBackend` inside a Bevy system.
+* feat(core): add draw-three rules
-- `cargo clippy --workspace -- -D warnings` must pass clean after every change.
+* fix(engine): correct drag z-order
-- `cargo test --workspace` must pass after every change.
+* test(core): undo boundary cases
 
 ---
 
-## Code Style
+## Commit conditions
 
-- Use `thiserror` for error types. Never `Box<dyn Error>` in library crates.
+* tests must pass
-- Prefer `Into<T>` over concrete types in public API function parameters.
+* clippy must be clean
-- All public items must have doc comments (`///`). Private items: comment only when non-obvious.
+
-- Derive order convention: `#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]`
+NEVER commit otherwise
-- Bevy systems: one responsibility per system. Use `Events` for cross-system communication, never shared mutable state.
-- SQL queries: use `sqlx::query!` macros (compile-time checked), not raw string queries.
-- No `clone()` calls in hot paths (game loop systems). Profile before optimising elsewhere.
 
 ---
 
-## Bevy Conventions
+# 8. Change Control (ASK BEFORE DOING)
 
-- One `Plugin` per major feature: `CardPlugin`, `AudioPlugin`, `AchievementPlugin`, `UIPlugin`, `SyncPlugin`.
+Claude must request confirmation before:
-- Resources own shared state. Events communicate between systems. Components own per-entity data.
+
-- All UI screens are built with Bevy UI (`bevy::ui`). Never mix UI layout and game logic in the same system.
+* adding dependencies
-- Layout is recomputed on `WindowResized` — never assume a fixed window size.
+* modifying `solitaire_sync`
-- **UI-first.** Every player-triggered action (new game, undo, draw, pause, open stats / settings / help / profile / leaderboard, switch mode, etc.) must be reachable from a visible UI control. Keyboard shortcuts are optional accelerators — never the sole entry point. New gameplay features ship with the UI control alongside the system that backs it; do not merge a feature that is keyboard-only.
+* changing DB schema
+* introducing `unsafe`
+* changing merge strategy
 
 ---
 
-## Git Workflow
+# 9. System Mental Model (IMPORTANT)
 
-- Commit after each passing phase, not after every file change.
+```text id="mental_model"
-- Commit message format: `type(scope): description`
+Core (rules + deterministic logic)
-  - `feat(core): add draw-three mode validation`
+    ↓
-  - `fix(engine): card z-order during drag`
+Engine (Bevy orchestration)
-  - `test(core): undo stack boundary conditions`
+    ↓
-  - `chore(server): add sqlx migration 002`
+Data layer (persistence + sync)
-- Never commit with failing tests or clippy warnings.
+    ↓
-- Never commit secrets, `.env` files, or `*.db` files.
+Server (optional external system)
+```
+
+Core is always the source of truth.
 
 ---
 
-## Ask Before Doing
+# 10. Known Platform Pitfalls
 
-- Adding a new crate dependency (discuss alternatives first).
+Must always be handled explicitly:
-- Changing a type in `solitaire_sync` (breaking change on both client and server).
+
-- Altering the database schema (requires a new sqlx migration).
+* Bevy `Time` uses `f32`
-- Introducing `unsafe` code anywhere.
+* `sqlx::migrate!()` path is crate-relative
-- Changing the merge strategy in `solitaire_sync::merge()`.
+* `dirs::data_dir()` may return `None`
+* Linux may lack keyring backend
 
 ---
 
-## Lessons Learned
+# 11. Forbidden Patterns
 
-> Add entries here when Claude makes a mistake so it isn't repeated.
+* game logic inside Bevy systems
+* duplication across crates
+* blocking async calls in ECS
+* insecure credential storage
+* bypassing core logic layer
 
-- Bevy's `Time` resource uses `f32` seconds; convert to `u64` only when writing to `StatsSnapshot`.
+---
-- `sqlx::migrate!()` macro path is relative to the crate root, not the workspace root.
+
-- `keyring` on Linux requires a running secret service (e.g. GNOME Keyring or KWallet) — handle `Error::NoStorageAccess` gracefully and fall back to prompting the user.
+# 12. Execution Rules for Claude
-- `dirs::data_dir()` returns `None` on some minimal Linux environments — always handle the `None` case explicitly, do not unwrap.
+
+When generating code:
+
+1. respect crate boundaries
+2. minimize diff size
+3. do not expand scope
+4. follow existing patterns
+5. preserve invariants
+
+If unclear:
+→ ask before acting
+
+---
+
+# 13. Relationship to ARCHITECTURE.md
+
+| File            | Role                      |
+| --------------- | ------------------------- |
+| CLAUDE.md       | execution + constraints   |
+| ARCHITECTURE.md | system design truth       |
+| Both combined   | full system understanding |
+
+---
+# 14. Context Injection System (AUTOMATIC SCOPE FILTER)
+
+## 14.1 Purpose
+
+Before generating any response, Claude MUST construct a **minimal relevant context set**.
+
+This prevents:
+
+* architectural drift
+* irrelevant spec loading
+* over-engineering
+* cross-crate confusion
+
+---
+
+## 14.2 Input Classification Step (MANDATORY)
+
+Every request MUST be classified into exactly one task type:
+
+```text id="task_types"
+feature
+bugfix
+refactor
+system_design
+bevy_system
+core_logic
+sync
+optimization
+test
+debug
+```
+
+If uncertain → ask clarification.
+
+---
+
+## 14.3 Context Selection Engine
+
+After classification, Claude MUST include ONLY the relevant sections below.
+
+---
+
+## 14.4 Context Map (CORE RULESET)
+
+### feature
+
+Include:
+
+* §2 Hard Global Constraints
+* §3 Engine Rules
+* ARCHITECTURE.md (crate of target feature only)
+* relevant data models (GameState, SyncPayload if needed)
+
+---
+
+### bugfix
+
+Include:
+
+* §2 Hard Global Constraints
+* §5 Code Standards
+* affected crate boundaries
+* relevant system (engine/core/sync only)
+
+---
+
+### refactor
+
+Include:
+
+* §3 Engine Rules
+* §5 Code Standards
+* §11 Forbidden Patterns
+* target crate boundaries
+
+---
+
+### system_design
+
+Include:
+
+* ARCHITECTURE.md (FULL)
+* §9 Mental Model
+* §1 System Architecture Mapping
+
+---
+
+### core_logic
+
+Include:
+
+* solitaire_core rules only
+* GameState model
+* MoveError model
+* §2.1–2.3 constraints
+
+---
+
+### bevy_system
+
+Include:
+
+* §3 Engine Rules
+* ECS rules (Events/Resources/Components)
+* UI-first constraint
+* relevant plugin system only
+
+---
+
+### sync
+
+Include:
+
+* SyncProvider trait
+* merge strategy rules
+* solitaire_sync models
+* §2.6 Sync Rules
+
+---
+
+### optimization
+
+Include:
+
+* target crate only
+* §5.4 Performance Rules
+* hot path constraints
+
+---
+
+### test
+
+Include:
+
+* §6 Build Rules
+* relevant module
+* expected invariants
+
+---
+
+### debug
+
+Include:
+
+* target file/module only
+* §2.3 Error Policy
+* runtime assumptions relevant to failure
+
+---
+
+## 14.5 Context Compression Rules
+
+Claude MUST obey:
+
+* never include full ARCHITECTURE.md unless system_design
+* max 2 crates per response unless explicitly required
+* prefer function-level context over file-level context
+* exclude unrelated plugins/systems
+
+---
+
+## 14.6 Context Priority Order
+
+When space is limited:
+
+1. Hard Constraints (§2)
+2. Target crate rules
+3. Data models
+4. Only then: architecture snippets
+
+---
+
+## 14.7 “No Context Pollution” Rule
+
+Claude must NOT include:
+
+* unrelated crates
+* unrelated plugins
+* unused data models
+* full architecture dumps
+* speculative systems
+
+---
+
+## 14.8 Self-Check Before Execution
+
+Before writing code, Claude MUST verify:
+
+* [ ] Is only relevant context included?
+* [ ] Is at least one hard constraint present?
+* [ ] Am I touching more than one crate unnecessarily?
+* [ ] Am I duplicating ARCHITECTURE.md content?
+
+If any fail → revise context selection.
+
+---
+
+## 14.9 Injection Output Format (Internal Model)
+
+Claude should behave as if it constructed:
+
+```text id="ctx_format"
+[SELECTED TASK TYPE]
+
+[MINIMAL REQUIRED RULES]
+
+[MINIMAL ARCHITECTURE SLICES]
+
+[RELEVANT MODELS]
+
+[REQUEST]
+```
+
+---
+
+## 14.10 Relationship to ARCHITECTURE.md
+
+* ARCHITECTURE.md = source of truth
+* CLAUDE.md = execution constraints
+* THIS SECTION = filtering layer between them
+
+---
+
+# END CONTEXT INJECTION SYSTEM

CLAUDE_PROMPT_PACK.md

@@ -0,0 +1,497 @@
+# CLAUDE_PROMPT_PACK.md
+
+version: 1.0
+
+---
+
+# 0. GLOBAL INSTRUCTION (prepend to every prompt)
+
+```
+You must follow CLAUDE_SPEC.md strictly.
+
+Rules:
+- Do not expand scope beyond what is defined
+- Do not refactor unrelated code
+- Do not introduce new dependencies
+- Prefer minimal, surgical changes
+- Use existing patterns in the codebase
+- Return minimal diffs or changed functions only
+
+Before writing code:
+1. List relevant constraints from CLAUDE_SPEC.md
+2. Identify risks
+3. Then implement
+```
+
+---
+
+# 1. FEATURE IMPLEMENTATION
+
+```
+# TASK: Feature Implementation
+
+feature: "<name>"
+
+goal:
+"<clear outcome>"
+
+scope:
+crates: []
+systems: []
+files: []
+
+non_goals:
+- ""
+
+constraints:
+- must follow CLAUDE_SPEC.md
+- event-driven architecture required
+- no blocking operations
+- no cross-crate leakage
+
+acceptance_criteria:
+- ""
+- ""
+
+edge_cases:
+- ""
+
+---
+
+## Required Patterns
+
+Use this pattern for systems:
+<PASTE EXISTING SYSTEM SNIPPET HERE>
+
+---
+
+## Output Format
+
+intent:
+plan:
+constraints_used:
+risks:
+
+code_changes:
+(minimal diffs only)
+
+notes:
+```
+
+---
+
+# 2. BUGFIX
+
+```
+# TASK: Bug Fix
+
+bug_description:
+"<what is broken>"
+
+expected_behavior:
+"<correct behavior>"
+
+root_cause_hint (optional):
+""
+
+scope:
+crates: []
+files: []
+
+constraints:
+- minimal fix only
+- no refactors unless required
+- must add regression protection if applicable
+
+---
+
+## Requirements
+
+1. Identify root cause
+2. Fix it minimally
+3. Preserve all invariants
+4. Do not change unrelated logic
+
+---
+
+## Output Format
+
+analysis:
+root_cause:
+fix_strategy:
+
+code_changes:
+(minimal diff)
+
+regression_test (only if high-value):
+
+notes:
+```
+
+---
+
+# 3. REFACTOR
+
+```
+# TASK: Refactor
+
+target:
+"<what is being improved>"
+
+goal:
+"<what improves>"
+
+scope:
+crates: []
+files: []
+
+non_goals:
+- no behavior changes
+- no new features
+
+constraints:
+- must preserve behavior exactly
+- must respect crate boundaries
+- must not duplicate logic
+
+---
+
+## Refactor Type
+
+- [ ] simplify logic
+- [ ] reduce duplication
+- [ ] improve readability
+- [ ] performance (non-invasive)
+
+---
+
+## Output Format
+
+analysis:
+issues_found:
+
+refactor_plan:
+
+code_changes:
+(diff only)
+
+verification:
+- behavior unchanged: yes/no
+- invariants preserved: yes/no
+
+notes:
+```
+
+---
+
+# 4. SYSTEM DESIGN (NEW FEATURE)
+
+```
+# TASK: System Design
+
+feature:
+"<name>"
+
+goal:
+"<what problem it solves>"
+
+constraints:
+- must fit existing architecture
+- must follow plugin + event model
+- must not violate crate boundaries
+
+---
+
+## Required Output
+
+design:
+
+components:
+- plugins:
+- systems:
+- events:
+- resources:
+
+data_flow:
+(step-by-step)
+
+integration_points:
+- where it connects to existing systems
+
+risks:
+- ""
+
+tradeoffs:
+- ""
+
+---
+
+## DO NOT
+
+- write full implementation
+- modify unrelated systems
+```
+
+---
+
+# 5. NEW BEVY SYSTEM
+
+```
+# TASK: Add Bevy System
+
+system_name:
+""
+
+trigger:
+(event or condition)
+
+reads:
+[Resources]
+
+writes:
+[Resources]
+
+emits:
+[Events]
+
+constraints:
+- must be event-driven
+- must not directly mutate unrelated state
+- must be single responsibility
+
+---
+
+## Output Format
+
+system_signature:
+
+implementation:
+(code only)
+
+notes:
+```
+
+---
+
+# 6. CORE LOGIC FUNCTION (solitaire_core)
+
+```
+# TASK: Core Logic Implementation
+
+function:
+"<name>"
+
+goal:
+"<what it does>"
+
+rules:
+- no IO
+- no async
+- no Bevy
+- deterministic
+
+invariants:
+- ""
+- ""
+
+errors:
+- ""
+
+---
+
+## Output Format
+
+constraints_checked:
+
+implementation:
+(code only)
+
+edge_case_handling:
+
+notes:
+```
+
+---
+
+# 7. SYNC / MERGE LOGIC
+
+```
+# TASK: Sync Logic
+
+goal:
+"<what is being merged or synced>"
+
+constraints:
+- must be deterministic
+- must be idempotent
+- must be lossless
+- must not delete data
+
+rules:
+- counters → max
+- times → min
+- collections → union
+
+---
+
+## Output Format
+
+analysis:
+
+merge_logic:
+
+code_changes:
+
+invariants_verified:
+- deterministic
+- idempotent
+- lossless
+
+notes:
+```
+
+---
+
+# 8. PERFORMANCE OPTIMIZATION
+
+```
+# TASK: Optimization
+
+target:
+"<what is slow>"
+
+constraints:CLAUDE_WORKFLOW.md
+- no behavior change
+- no architecture change
+- minimal code changes
+
+---
+
+## Output Format
+
+analysis:
+bottleneck:
+
+optimization_strategy:
+
+code_changes:
+
+impact_estimate:
+
+notes:
+```
+
+---
+
+# 9. TEST GENERATION (STRICT MODE)
+
+```
+# TASK: Test Generation
+
+target:
+"<function/system>"
+
+reason:
+- bugfix | complex logic | invariant protection
+
+constraints:
+- no redundant tests
+- must test real behavior
+- must fail if logic breaks
+
+---
+
+## Output Format
+
+test_cases:
+- ""
+
+test_code:
+
+notes:
+```
+
+---
+
+# 10. DEBUGGING / INVESTIGATION
+
+```
+# TASK: Debug
+
+problem:
+"<symptom>"
+
+context:
+"<relevant code or system>"
+
+---
+
+## Required Steps
+
+1. List possible causes
+2. Narrow down most likely
+3. Suggest verification steps
+4. Provide minimal fix
+
+---
+
+## Output Format
+
+hypotheses:
+
+most_likely:
+
+verification_steps:
+
+fix:
+
+notes:
+```
+
+---
+
+# 11. HARD CONSTRAINT OVERRIDE (RARE)
+
+```
+# TASK: Exception Handling
+
+reason:
+"<why constraints must be bent>"
+
+requested_exception:
+"<rule being broken>"
+
+justification:
+"<why unavoidable>"
+
+---
+
+## Output Format
+
+analysis:
+
+alternatives_considered:
+
+final_decision:
+
+risk:
+```
+
+---
+
+# 12. STOP CONDITIONS (always append)
+
+```
+Stop when:
+- acceptance criteria are met
+- code is minimal and correct
+
+Do NOT:
+- expand scope
+- refactor unrelated code
+- optimize prematurely
+```
+
+---
+
+# END

CLAUDE_SPEC.md

@@ -0,0 +1,292 @@
+# CLAUDE_SPEC.md
+
+version: 1.0
+
+---
+
+## 0. Global Rules
+
+(Core determinism, panic policy, and event-driven engine constraints live in CLAUDE.md §2.1, §2.3, §3.1. Listed here only when they add information CLAUDE.md doesn't carry.)
+
+rules:
+
+* id: single_source_of_truth
+  description: "GameStateResource is the only mutable game state in runtime"
+
+* id: sync_is_additive
+  description: "Remote data must never destructively overwrite local data"
+
+---
+
+## 1. Crate Graph
+
+crates:
+solitaire_core:
+depends_on: [rand, serde, chrono]
+forbidden_deps: [bevy, reqwest, tokio, std::fs]
+
+solitaire_sync:
+depends_on: [serde, serde_json, uuid, chrono]
+role: "shared_types"
+
+solitaire_data:
+depends_on: [solitaire_core, solitaire_sync, reqwest, tokio, keyring]
+role: "persistence_and_sync"
+
+solitaire_engine:
+depends_on: [bevy, kira, solitaire_core, solitaire_data]
+role: "runtime_engine"
+
+solitaire_server:
+depends_on: [solitaire_sync, axum, sqlx, jsonwebtoken]
+role: "backend"
+
+solitaire_app:
+depends_on: [solitaire_engine]
+role: "entrypoint"
+
+---
+
+## 2. Data Ownership
+
+ownership:
+GameState:
+owner: solitaire_core
+mutable_in: solitaire_engine
+access_pattern: "via GameStateResource only"
+
+StatsSnapshot:
+owner: solitaire_data
+
+PlayerProgress:
+owner: solitaire_data
+
+AchievementRecord:
+owner: solitaire_data
+
+SyncPayload:
+owner: solitaire_sync
+
+---
+
+## 3. State Transitions
+
+state_machine:
+GameState:
+transitions:
+- action: move_cards
+returns: Result<GameState, MoveError>
+
+```
+  - action: draw
+    returns: Result<GameState, MoveError>
+
+  - action: undo
+    returns: Result<GameState, MoveError>
+
+invariants:
+  - "52 cards always exist"
+  - "no duplicate card IDs"
+  - "all cards belong to exactly one pile"
+```
+
+---
+
+## 4. Event System
+
+events:
+
+input:
+- MoveRequestEvent
+- DrawRequestEvent
+- UndoRequestEvent
+- NewGameRequestEvent
+
+state:
+- StateChangedEvent
+- GameWonEvent
+
+meta:
+- AchievementUnlockedEvent
+- SyncCompleteEvent
+
+rules:
+
+* "Input events trigger core logic"
+* "Core logic emits state events"
+* "UI reacts to state events only"
+
+---
+
+## 5. Sync Contract
+
+sync:
+
+provider_trait:
+methods:
+- pull() -> SyncPayload
+- push(payload) -> SyncResponse
+
+guarantees:
+- "non-blocking during gameplay"
+- "blocking allowed on exit only"
+
+merge:
+rules:
+counters: "max"
+best_times: "min"
+collections: "union"
+achievements: "never removed"
+
+```
+properties:
+  - deterministic
+  - idempotent
+  - lossless
+```
+
+---
+
+## 6. Persistence
+
+storage:
+
+format: json
+
+files:
+- stats.json
+- progress.json
+- achievements.json
+- settings.json
+- game_state.json
+
+guarantees:
+- atomic_write: true
+- crash_safe: true
+
+---
+
+## 7. Engine Rules
+
+engine:
+
+mutation_rules:
+- "Only GameLogicSystem mutates GameState"
+- "UI systems are read-only"
+
+threading:
+- "sync runs on AsyncComputeTaskPool"
+- "main thread must never block"
+
+plugins:
+pattern: "feature_isolation"
+communication: "events"
+
+---
+
+## 8. Server Contract
+
+server:
+
+auth:
+method: jwt
+access_expiry: 24h
+refresh_expiry: 30d
+
+endpoints:
+- POST /api/auth/register
+- POST /api/auth/login
+- GET /api/sync/pull
+- POST /api/sync/push
+
+limits:
+payload_max: 1MB
+rate_limit: "10 req/min auth routes"
+
+---
+
+## 9. Achievement System
+
+achievements:
+
+definition_location: solitaire_core
+state_location: solitaire_data
+
+types:
+- condition_based
+- event_driven
+
+rule:
+- "achievements cannot be revoked"
+
+---
+
+## 10. Testing Rules
+
+testing:
+
+philosophy:
+- "test real failures"
+- "avoid redundant tests"
+
+required_coverage:
+solitaire_core:
+- move_validation
+- undo_integrity
+- win_detection
+
+```
+solitaire_sync:
+  - merge_correctness
+  - idempotency
+```
+
+---
+
+## 11. Prohibited Patterns
+
+(See CLAUDE.md §11 for the canonical forbidden-patterns list.)
+
+---
+
+## 12. Extension Points
+
+extensibility:
+
+sync_backends:
+pattern: "implement SyncProvider"
+
+game_modes:
+location: solitaire_core::GameMode
+
+plugins:
+rule: "new feature = new plugin"
+
+---
+
+## 13. Validation Checklist (for Claude)
+
+validation:
+
+* check: "crate dependency rules respected"
+* check: "no panics in core"
+* check: "events used for cross-system communication"
+* check: "GameState mutations centralized"
+* check: "merge function properties preserved"
+* check: "no blocking operations in main loop"
+
+---
+
+## 14. Mental Model
+
+model:
+
+layers:
+- core
+- engine
+- data
+- server
+
+flow:
+- input -> engine -> core -> engine -> ui
+- data <-> sync <-> server

CLAUDE_WORKFLOW.md

@@ -0,0 +1,335 @@
+# CLAUDE_WORKFLOW.md
+
+version: 1.0
+
+---
+
+## 0. Overview
+
+This workflow defines a **two-agent system**:
+
+* **Builder Agent** → writes and modifies code
+* **Guardian Agent** → enforces architecture + rejects invalid changes
+
+No code is considered valid unless it passes Guardian validation.
+
+---
+
+## 1. Agent Roles
+
+### 1.1 Builder Agent
+
+role: "code_generation"
+
+responsibilities:
+
+* implement features
+* refactor code
+* generate tests (only when justified)
+* follow CLAUDE_SPEC.md
+
+constraints:
+
+* cannot bypass validation
+* must declare intent before writing code
+
+output_contract:
+must_produce:
+- change_summary
+- files_modified
+- reasoning (short)
+- code_diff
+
+---
+
+### 1.2 Guardian Agent
+
+role: "architecture_enforcement"
+
+responsibilities:
+
+* validate against CLAUDE_SPEC.md
+* detect violations
+* reject or approve changes
+* suggest minimal fixes (not full rewrites)
+
+constraints:
+
+* no feature implementation
+* no large rewrites
+* must be deterministic
+
+output_contract:
+must_produce:
+- status: APPROVED | REJECTED
+- violations[]
+- required_fixes[]
+- optional_improvements[]
+
+---
+
+## 2. Workflow Pipeline
+
+```text
+User Request
+    ↓
+Builder Agent (proposal + code)
+    ↓
+Guardian Agent (validation)
+    ↓
+IF approved → commit
+IF rejected → feedback → Builder retry
+```
+
+---
+
+## 3. Builder Protocol
+
+### Step 1 — Intent Declaration
+
+Builder MUST start with:
+
+```yaml
+intent:
+  feature: "<name>"
+  crates_touched: []
+  systems_affected: []
+  risk_level: low|medium|high
+```
+
+---
+
+### Step 2 — Plan
+
+```yaml
+plan:
+  - step: "..."
+  - step: "..."
+```
+
+---
+
+### Step 3 — Implementation
+
+* Only modify declared crates
+* Follow ownership rules
+* Use events for cross-system communication
+
+---
+
+### Step 4 — Output
+
+```yaml
+change_summary: "..."
+
+files_modified:
+  - path: ...
+    change: "..."
+
+violations_self_check:
+  - none | list
+
+notes: "short reasoning"
+```
+
+---
+
+## 4. Guardian Protocol
+
+### Step 1 — Spec Validation
+
+Check against:
+
+* crate boundaries
+* mutation rules
+* event system usage
+* sync guarantees
+* forbidden patterns
+
+---
+
+### Step 2 — Invariant Validation
+
+Must verify:
+
+* GameState invariants preserved
+* no new panic paths
+* no blocking calls in engine
+* merge properties unchanged
+
+---
+
+### Step 3 — Output Decision
+
+#### APPROVED
+
+```yaml
+status: APPROVED
+
+notes:
+  - "no violations"
+```
+
+---
+
+#### REJECTED
+
+```yaml
+status: REJECTED
+
+violations:
+  - id: core_purity_violation
+    file: "solitaire_core/src/..."
+    reason: "uses std::fs"
+
+required_fixes:
+  - "move IO to solitaire_data"
+
+optional_improvements:
+  - "simplify event naming"
+```
+
+---
+
+## 5. Enforcement Rules
+
+### Hard Fail (automatic rejection)
+
+* core crate uses IO / Bevy / network
+* GameState mutated outside GameLogicSystem
+* blocking async on main thread
+* duplicate logic across crates
+* merge function altered incorrectly
+
+---
+
+### Soft Fail (allowed but flagged)
+
+* unnecessary complexity
+* redundant tests
+* minor architectural drift
+
+---
+
+## 6. Iteration Loop
+
+Max attempts per task: **3**
+
+```text
+Attempt 1 → Reject → Fix
+Attempt 2 → Reject → Fix
+Attempt 3 → Final decision
+```
+
+If still failing:
+→ escalate to user
+
+---
+
+## 7. Diff Strategy
+
+Builder MUST produce:
+
+* minimal diffs
+* no unrelated refactors
+* no formatting-only changes
+
+---
+
+## 8. Test Strategy Integration
+
+Builder rules:
+
+* only add tests if:
+
+  * fixing a bug
+  * protecting complex logic
+  * validating invariants
+
+Guardian rejects:
+
+* redundant tests
+* no-op tests
+
+---
+
+## 9. Optional Extensions
+
+### 9.1 Third Agent (Optimizer)
+
+role: performance + cleanup
+
+runs AFTER approval:
+
+* reduce allocations
+* simplify logic
+* improve ECS scheduling
+
+---
+
+### 9.2 CI Integration
+
+Pipeline:
+
+```text
+Builder → Guardian → cargo check → clippy → tests
+```
+
+Guardian runs BEFORE compilation to catch structural issues early.
+
+---
+
+## 10. Example Interaction
+
+### Builder
+
+```yaml
+intent:
+  feature: "undo stack limit fix"
+  crates_touched: [solitaire_core]
+  risk_level: low
+```
+
+```yaml
+change_summary: "limit undo stack to 64 entries"
+
+files_modified:
+  - solitaire_core/src/game_state.rs
+
+notes: "prevents unbounded memory growth"
+```
+
+---
+
+### Guardian
+
+```yaml
+status: APPROVED
+
+notes:
+  - "respects core constraints"
+  - "no invariant violations"
+```
+
+---
+
+## 11. Mental Model
+
+* Builder = **creative**
+* Guardian = **strict**
+
+Builder explores
+Guardian enforces
+
+Neither replaces the other.
+
+---
+
+## 12. Success Criteria
+
+System is working if:
+
+* architectural violations go to ~0
+* code stays consistent across features
+* refactors become safe
+* complexity grows sub-linearly

Cargo.toml

@@ -7,6 +7,7 @@ members = [
     "solitaire_server",
     "solitaire_app",
     "solitaire_assetgen",
+    "solitaire_wasm",
 ]
 resolver = "2"
 
@@ -29,13 +30,65 @@ dirs        = "6"
 keyring     = "4"
 keyring-core = "1"
 reqwest     = { version = "0.13", features = ["json", "rustls", "rustls-native-certs"], default-features = false }
+arboard     = { version = "3", default-features = false }
 
 solitaire_core   = { path = "solitaire_core" }
 solitaire_sync   = { path = "solitaire_sync" }
 solitaire_data   = { path = "solitaire_data" }
 solitaire_engine = { path = "solitaire_engine" }
 
-bevy = "0.18"
+# Bevy with `default-features = false` to avoid the unused
+# `bevy_audio → rodio + symphonia + cpal 0.15 + alsa 0.9` chain.
+# Audio is handled directly by `kira` in `audio_plugin.rs`, so the
+# `bevy_audio` feature is intentionally omitted. The features below
+# enumerate every leaf of the standard `2d` + `ui` meta-features that
+# we actually use; new features should only be added with a
+# corresponding use site.
+bevy = { version = "0.18", default-features = false, features = [
+    # default_app
+    "async_executor",
+    "bevy_asset",
+    "bevy_input_focus",
+    "bevy_log",
+    "bevy_state",
+    "bevy_window",
+    "custom_cursor",
+    "reflect_auto_register",
+    # default_platform (desktop subset)
+    "std",
+    "bevy_winit",
+    "default_font",
+    "multi_threaded",
+    # winit prefers Wayland when WAYLAND_DISPLAY is set on the
+    # session and falls through to X11 otherwise. Without `wayland`,
+    # winit-on-Wayland-session falls back to XWayland which renders
+    # the game in an X11 frame inside the Wayland compositor.
+    "wayland",
+    "x11",
+    # Android: NativeActivity glue. The feature is target-gated inside
+    # bevy_internal — desktop builds compile it out, so leaving it on
+    # the always-on list is harmless on Linux/macOS/Windows. Pairs with
+    # cargo-apk's NativeActivity wrapper (cargo-apk 0.10+ uses this by
+    # default). Switch to `android-game-activity` later if we want
+    # AndroidX GameActivity for Google Play Games integration.
+    "android-native-activity",
+    # common_api
+    "bevy_color",
+    "bevy_image",
+    "bevy_mesh",
+    "bevy_shader",
+    "bevy_text",
+    "png",
+    # 2d rendering
+    "bevy_camera",
+    "bevy_render",
+    "bevy_core_pipeline",
+    "bevy_sprite",
+    "bevy_sprite_render",
+    # UI rendering
+    "bevy_ui",
+    "bevy_ui_render",
+] }
 kira = "0.12"
 
 # SVG rasterisation pipeline for the runtime card-theme system.

README.md

@@ -22,7 +22,7 @@ optional self-hosted sync so your stats follow you across machines.
   move within picker rows, Enter activates; works across every modal and
   the HUD action bar
 - **Progression** — XP, levels, unlockable card backs and backgrounds
-- **18 Achievements** — including secret ones
+- **19 Achievements** — including secret ones
 - **Daily Challenge** — server-seeded so every player worldwide gets the
   same deal
 - **Leaderboard** — opt-in, powered by your own self-hosted server

SESSION_HANDOFF.md

@@ -1,109 +1,282 @@
-# Solitaire Quest — UX Overhaul Session Handoff
+# Solitaire Quest — Session Handoff
 
-**Last updated:** 2026-05-02 (session 7, late-late) — Third UX iteration round complete on top of v0.12.0. Six post-handoff candidates shipped plus two code-review fixes. Ready to tag v0.13.0.
+**Last updated:** 2026-05-07 — v0.20.0 cut. Two through-lines closed
+in this cycle: a full **Terminal visual-identity port** (token system
+in `ui_theme` plus downstream chrome migrations across modal scaffold,
+gameplay-feedback, toasts, and the table / card / splash surfaces)
+and the **Android persistence shim** that closes the
+`dirs::data_dir() = None` pitfall flagged in CLAUDE.md §10. The
+Android *build* target landed earlier in the cycle (`fb8b2ac`); this
+session paid down the persistence half so a real APK can survive a
+cold start. The 24 Stitch-rendered mockups are now in-tree under
+`docs/ui-mockups/`; future plugin work diffs against the matching
+mockup before touching pixels.
 
 ## Status at pause
 
-- **HEAD:** doc-commit closing this round (CHANGELOG + handoff). Local master has the impending tag at this commit.
+- **HEAD on origin:** the v0.20.0 docs commit (the one that lands
-- **Working tree:** clean apart from untracked `CARD_PLAN.md` (intentional).
+  this file + CHANGELOG cut). Tag not yet pushed; cut whenever
-- **Build:** `cargo clippy --workspace --all-targets -- -D warnings` clean.
+  feels right.
-- **Tests:** **1053 passed / 0 failed** across the workspace (+22 from v0.12.0's 1031 baseline).
+- **Working tree:** clean apart from the still-untracked `artwork/`
-- **Tags on origin:** `v0.9.0`, `v0.10.0`, `v0.11.0`, `v0.12.0`. v0.13.0 is the next tag.
+  directory (intentional — the card PNGs there are mid-flight for
+  the Terminal aesthetic and committing now would freeze a
+  transitional state).
+- **Build:** `cargo clippy --workspace --all-targets -- -D warnings`
+  clean.
+- **Tests:** **1176 passing / 0 failing** across the workspace.
+  Six new tests this cycle: four `ui_theme` invariant guards
+  (type / spacing / z-index scales + `scaled_duration`), one
+  toast-variant-border-mapping pair, and four palette-tracking
+  guards on `MARKER_VALID` / `HINT_PILE_HIGHLIGHT_COLOUR` /
+  `RIGHT_CLICK_HIGHLIGHT_COLOUR` / toast-border distinctness. No
+  known flakes.
+- **Tags on origin:** `v0.9.0` through `v0.19.0`. v0.20.0 not yet
+  tagged.
 
-## Where we are
+## What shipped in v0.20.0
 
-Post-v0.12.0 the handoff listed six "next-round candidates" — every one shipped today plus two code-review fixes (font handling unified to bundled-only, sccache wiring removed). v0.13.0 is the right slice.
+### Terminal visual-identity port
 
-The candidate list is exhausted again. Direction is open.
+Top-down stack — every commit downstream of the token system
+reads from it, so swapping the palette is now a one-file edit:
 
-### Design direction (unchanged)
+- **`ui_theme` token system** (`0d477ac`). base16-eighties
+  palette, 5-rung type scale, 7-rung 4-multiple spacing scale,
+  3-step radius, 14-rung z-index hierarchy, full motion budget,
+  4 invariant-pinning unit tests. Card-shadow alphas pinned to 0
+  (Terminal achieves depth via 1px borders + tonal layering).
+- **Modal scaffold already on tokens** — `ui_modal` was ported
+  in the same commit's wake; three stale "loud yellow" /
+  "magenta secondary" doc comments fixed.
+- **Gameplay feedback → semantic state tokens** (`ceec4fc`).
+  Selection / valid-drop tints route through `ACCENT_PRIMARY` /
+  `STATE_WARNING` / `STATE_SUCCESS`.
+- **Toasts** (`a137607`). New `ToastVariant` enum
+  (Info / Warning / Error / Celebration); opaque `BG_ELEVATED`
+  + 1px accent border + bottom-anchor. All ten call sites pass
+  their semantic variant.
+- **`table_plugin` chrome** (`651f406`).
+  `PILE_MARKER_DEFAULT_COLOUR` promoted; `cursor_plugin` imports
+  it, replacing a "kept in sync" doc comment with a compile-
+  enforced invariant. `HINT_PILE_HIGHLIGHT_COLOUR` →
+  `STATE_WARNING`.
+- **`card_plugin` chrome** (`d752870`). Drag-elevation shadow
+  routes through `CARD_SHADOW_*` tokens. `RIGHT_CLICK_HIGHLIGHT_COLOUR`
+  → `STATE_SUCCESS`. Stock recycle "↺" text → `TEXT_PRIMARY @ 0.7α`.
+  Card-face / suit / card-back palette intentionally NOT migrated
+  (artwork dependency — see open-list item below).
+- **Splash cursor** (`cdcadda`). The signature `▌` cyan glyph
+  (96 px) added above the wordmark, matching the spec.
+- **Hint-source / dest pairing** (`9891ae4`). `input_plugin`'s
+  source-card tint now matches the destination pile's
+  `STATE_WARNING`.
+- **Design system + 24-mockup library** (`fa7f98a`).
+  `docs/ui-mockups/design-system.md` + 24 Stitch mockups (HTML +
+  PNG) covering every screen plus 9 missing-plugin surfaces.
+- **`card_shadow_params` test aligned** (`1d1543e`). Drag-vs-
+  idle shadow assertion loosened to `>=` to accept the Terminal
+  "no shadow" intent without losing the regression-guard.
 
-- **Tone:** Balatro — chunky readable type, theatrical hierarchy, satisfying micro-interactions.
+### Android persistence
-- **Palette:** Midnight Purple base + Balatro yellow primary + warm magenta secondary.
+
-- See `~/.claude/projects/-home-manage-Rusty-Solitare/memory/project_ux_overhaul_2026-04.md` (machine-local).
+- **`solitaire_data::data_dir` shim** (`4b51e50`). New
+  `solitaire_data::platform::data_dir()` falls through to
+  `dirs::data_dir()` on desktop and returns the per-app sandbox
+  at `/data/data/com.solitairequest.app/files` on Android — no
+  JNI needed (package id pinned in `[package.metadata.android]`).
+  Six `solitaire_data` callsites + `solitaire_engine/assets/user_dir.rs`
+  migrated. Settings, stats, achievements, replays, game-state,
+  time-attack sessions, and user themes now persist on Android.
+
+### Inherited from earlier in the cycle (pre-session)
+
+- Android build target + APK (`fb8b2ac`), runbook (`59424a3`),
+  F3 FPS overlay (`690e1d2`), Smart Window Size opt-out
+  (`e1b8766`), Shareable badge (`9b065e5`), Help cheat-sheet
+  M/P/Enter rows (`35516d3`), `pull_failure_sets_error_status`
+  flake fix (`67c150b`).
+
+## Open punch list
+
+### Phase Android (build + persistence shipped; runtime gaps remain)
+
+- **APK launch verification on AVD / device.** `adb install` then
+  `adb logcat` against the `bevy_test` AVD or an x86_64 device.
+  The build works and persistence is wired, but no end-to-end
+  device run has been logged. Shakes out runtime bugs the build +
+  unit tests can't catch.
+- **JNI ClipboardManager bridge.** Replaces the Android stub for
+  the Stats "Copy share link" toast. `arboard` doesn't ship an
+  Android backend; small custom JNI call.
+- **Android Keystore for credentials.** `keyring` is target-gated
+  to a stub returning `KeychainUnavailable`; replace with Android
+  Keystore via JNI when sync auth ships on mobile.
+- **Google Play Games (gpgs) integration.** Listed as a
+  Phase-Android target since Phase 1; now unblocked by the build
+  target.
+- **Cosmetic `cargo apk build --lib` workaround.** Post-sign
+  panic doesn't affect the APK on disk but produces noisy stderr.
+  Either upstream a cargo-apk fix or document `--lib` as
+  canonical in the runbook.
+
+### Visual-identity follow-ups (opened by v0.20.0's port)
+
+- **Card-face / suit / card-back artwork regeneration.** The
+  Terminal spec calls for dark `#1a1a1a` cards with light suit
+  pips (pink for hearts/diamonds, foreground gray for spades/
+  clubs); the runtime path still renders the legacy white-card
+  PNG artwork. The fallback constants in `card_plugin`
+  (`CARD_FACE_COLOUR`, `RED_SUIT_COLOUR`, `BLACK_SUIT_COLOUR`,
+  `CARD_FACE_COLOUR_RED_CBM`, `card_back_colour` palette) are
+  intentionally unmigrated and should swap in lockstep with the
+  artwork. Largest visible payoff remaining in the visual-
+  identity arc.
+- **Splash boot-loader richness.** The mockup
+  (`docs/ui-mockups/splash-mobile.html`) calls for a scanline
+  overlay, ✓ lime check log lines, pulsing cursor, ROOT@SOLITAIRE
+  prompt, and a loading bar — none of which v0.20.0's
+  cursor-glyph-only port pulled in. Aesthetic feature, its own
+  commit.
+- **Replay-overlay redesign.** The mockup
+  (`docs/ui-mockups/replay-overlay-mobile.html`) envisions a
+  much richer surface (terminal `▌replay.tsx` header, move log
+  scroll, MOVE 47/87 chip, WIN MOVE callout, status bar) versus
+  the current top banner. Aesthetic feature.
+- **Toast Warning / Error variants.** The new `ToastVariant`
+  enum has slots for `Warning` (gold) and `Error` (pink) but no
+  in-engine event uses them yet (the four current toast events
+  all map to Info or Celebration). Wire when a warning- or
+  error-flavoured toast event materialises.
+
+### Carried forward from v0.19.0
+
+- **App icon round.** `Window::icon` not yet wired; no
+  `.icns` / `.ico` / Linux hicolor PNG hierarchy. The 11-size
+  icon export the v0.19 handoff referenced is *not* currently
+  in `artwork/` (current `artwork/` holds the reverted Rusty
+  Pixel card PNGs and is intentionally untracked); icon-export
+  needs to be re-run before this item can be picked up.
+  Half-day task once the PNGs are back in place. No cert
+  dependency.
+
+### Other small candidates
+
+- **Prev/Next selector chips spawn site.** v0.19.0's `9b065e5`
+  noted Prev/Next markers exist in `stats_plugin` but no spawn
+  site renders them today — the Shareable badge therefore lands
+  on the single-replay caption. If/when Prev/Next is plumbed,
+  the badge will need to follow.
+- **Toast queue / immediate unification.** The two toast paths
+  (`spawn_queued_toast` for `InfoToastEvent` queue; `spawn_toast`
+  for fire-and-forget) now share visual treatment but remain
+  separate functions because they serve different temporal
+  needs (sequential vs. parallel). If overlap becomes a UX
+  issue, merge into one queue with priority lanes.
+
+### Process notes
+
+- **Token-port pattern.** v0.20.0's chrome-migration commits
+  set a reusable shape for "centralized design system applied
+  across N plugins":
+  1. Constants module (`ui_theme.rs`) is the source of truth.
+  2. Const sites that can't call `Alpha::with_alpha` (not yet
+     `const` on stable) use a literal RGB matching the token,
+     with a unit test pinning the RGB to the token (e.g.
+     `MARKER_VALID`, `HINT_PILE_HIGHLIGHT_COLOUR`,
+     `RIGHT_CLICK_HIGHLIGHT_COLOUR`).
+  3. Cross-plugin duplication (e.g. `MARKER_DEFAULT` ↔
+     `PILE_MARKER_DEFAULT_COLOUR`) collapses to a single
+     promoted const re-exported from one plugin and imported
+     by the other — replaces "kept in sync" doc comments with a
+     compile-time invariant.
+  4. Domain colours (suit pips, card faces, lerp helpers) stay
+     as literals with a comment naming the rationale; only UI
+     chrome routes through tokens.
+- **Audit before migrating wide.** Before touching any plugin,
+  grep for the literal pattern (`Color::srgb\(|Color::srgba\(|
+  Color::WHITE|Color::BLACK`) and classify each hit as domain
+  vs. chrome. Most plugins after the modal scaffold port turned
+  out to be 100 % token-correct already; the audit prevents
+  wasted churn.
 
 ### Canonical remote
 
-`github.com/funman300/Rusty_Solitaire` is the canonical repo. Always push there.
+`github.com/funman300/Rusty_Solitaire` is the canonical repo.
+Always push there.
 
-## Session 7 round 3 (shipped 2026-05-02 late-late) — v0.13.0
+### Design direction (now Terminal — base16-eighties)
 
-| Area | Commit | What landed |
+- **Tone:** retro-terminal / synthwave — flat depth (no box-shadows),
-|---|---|---|
+  monospaced-forward typography (JetBrains Mono / FiraMono), tight
-| Font fix | `17f9b51` | Code-review fix: bundle FiraMono via `include_bytes!()` in both `font_plugin` and `svg_loader`; drop `load_system_fonts`, drop the lenient resolver, drop the CSS-generic fallbacks. New `bundled_font_resolver` always returns the single bundled face. Parse failure aborts with a clear error. |
+  16 px edge margins, 8 px card radius.
-| sccache removal | `13dd44b` | Code-review fix: deleted `.cargo/config.toml` and the `.cargo` directory. Plain `cargo build` works without per-project setup. |
+- **Palette:** near-black surface ramp (`#151515` / `#202020` / `#2a2a2a`
-| Wave 1 bundle | `ddc8f27` | **Tooltip-delay slider** in Settings → Gameplay (0.0–1.5 s, 0.1 s steps, "Instant" label at zero). **Win-streak fire animation** at thresholds [3, 5, 10] via new `WinStreakMilestoneEvent`. **Score-breakdown reveal on win modal** with per-row stagger (Base / Time bonus / No-undo / Multiplier / Total), respects `AnimSpeed::Instant`. |
+  / `#353535`), cyan primary CTA (`#6fc2ef`), lime success
-| Card-back theming | `7ed4f2c` | The active theme's `back.svg` now actually drives the face-down sprite. Legacy `back_N.png` picker remains as a fallback for themes without a back; Settings caption surfaces when the override is in effect. |
+  (`#acc267`), gold warning (`#ddb26f`), pink error / suit-red
-| Drag-with-keyboard | `a0fc0d2` | Tab → Enter → arrows → Enter completes a move without a mouse. New `KeyboardDragState` resource; mutual exclusion with mouse drag via `KEYBOARD_DRAG_TOUCH_ID` sentinel. Help + onboarding hotkey lists updated. |
+  (`#fb9fb1`), lavender celebration (`#e1a3ee`), teal info
-| Right-click radial | `b37f0cb` | Hold RMB on a face-up card → ring of icons at the cursor, one per legal destination; release over an icon → `MoveRequestEvent`. New `RadialMenuPlugin`. Help controls reference gains a "Mouse" section. |
+  (`#12cfc0`).
+- **Two-color suits.** Red = `#fb9fb1`, black = `#d0d0d0`. Outlined
+  glyphs for diamonds & clubs are *always on*; the Settings
+  "color-blind mode" toggle only swaps red → cyan.
 
-## Open punch list — release prep
+(Was: Midnight Purple base + Balatro yellow primary + warm magenta.
-
+Replaced this cycle.)
-1. **Push** the unpushed commits to origin (5 commits now: 17f9b51, 13dd44b, ddc8f27, 7ed4f2c, a0fc0d2, b37f0cb, plus the impending doc commit).
-2. **Tag v0.13.0** at the doc-commit HEAD.
-3. **Desktop packaging** per `ARCHITECTURE.md §17`. The Arch PKGBUILD exists in `/home/manage/solitaire-quest-pkgbuild/` (separate repo). Pending: app icon, macOS `.icns` + notarisation cert, Windows `.ico` + Authenticode cert, AppImage recipe.
-
-## Open punch list — UX iteration (next-round candidates)
-
-The v0.13.0 list is exhausted. Fresh candidates for a future round:
-
-- **In-game daily-challenge calendar** — currently the daily challenge fires once on launch; a Settings or Profile-side calendar showing past days' completion / streak status would make the progression visible.
-- **Card-art preview in the theme picker** — Settings → Cosmetic shows theme name only; rendering the theme's Ace-of-Spades + back side-by-side as a thumbnail would make picking faster.
-- **Per-mode high-score readout** in the Stats screen. Currently lifetime stats roll all modes together.
-- **Auto-save in-progress games** in Zen / Time Attack so players who close the window mid-session don't lose their state.
-- **Configurable scoring weights** for the curious — Settings → Gameplay slider for time-bonus magnitude. Cosmetic but power-user appealing.
-- **Replay a winning game** — record the seed + move list at win time and offer "watch replay" from the Stats screen.
-
-## Card-theme system (CARD_PLAN.md, fully shipped)
-
-Seven phases landed across `b8fb3fb` → `924a1e2` in v0.11.0; v0.13.0's `7ed4f2c` finally consumes the per-theme `back.svg`. End-to-end:
-
-- **Bundled default theme** ships in the binary via `embedded://` — 52 hayeah/playing-cards-assets SVGs + a midnight-purple `back.svg`.
-- **User themes** under `themes://`. Drop a directory containing `theme.ron` + 53 SVGs.
-- **Importer** at `solitaire_engine::theme::import_theme(zip)` validates archives and atomically unpacks.
-- **Picker UI** in Settings → Cosmetic; the active theme's `back` overrides the legacy `back_N.png` picker when present.
 
 ## Resume prompt
 
 ```
 You are a senior Rust + Bevy developer working on Solitaire Quest.
-Working directory: <Rusty_Solitaire clone path on this machine — local
+Working directory: <Rusty_Solitaire clone path on this machine>.
-directory may still be named Rusty_Solitare from earlier; that's fine>.
+Branch: master. v0.20.0 just cut on 2026-05-07; CHANGELOG's new
-Branch: master. Direction is OPEN — three UX iteration rounds shipped
+[Unreleased] section is empty pending the next cycle's threads.
-and v0.13.0 is ready to tag.
 
-State: HEAD at the doc-commit closing session 7 round 3. Local master
+State: HEAD on the v0.20.0 docs commit. Tag not pushed yet — last
-is several commits ahead of origin and unpushed. Working tree clean
+pushed tag is v0.19.0. Working tree clean apart from the
-apart from untracked CARD_PLAN.md (intentional).
+intentionally-untracked `artwork/`.
-Build: cargo clippy --workspace --all-targets -- -D warnings clean.
-Tests: 1053 passed / 0 failed.
 
 READ FIRST (in order, before doing anything):
-  1. SESSION_HANDOFF.md  — full state, session 7 changelog, punch list
+  1. SESSION_HANDOFF.md  — this file
-  2. CHANGELOG.md        — release-by-release record
+  2. CHANGELOG.md        — [0.20.0] section is the most recent cut
-  3. CLAUDE.md           — hard rules (UI-first, no panics, etc.)
+  3. CLAUDE.md           — unified-3.0 rule set
-  4. ARCHITECTURE.md     — crate responsibilities + data flow
+  4. CLAUDE_SPEC.md      — formal architecture spec
-  5. ~/.claude/projects/<this-project>/memory/MEMORY.md
+  5. ARCHITECTURE.md     — crate responsibilities + data flow
-                         — saved feedback / project context (machine-local;
+  6. docs/ui-mockups/    — design system + 24-mockup library
-                           may be missing on a fresh machine)
+                           (Terminal aesthetic — landed in fa7f98a)
+  7. docs/android/*      — Android setup + build runbook
+  8. ~/.claude/projects/<this-project>/memory/MEMORY.md
+                         — saved feedback / project context
+                           (machine-local; may be missing on a
+                           fresh machine)
 
 DECISION TO ASK THE PLAYER FIRST:
-  A. Push and cut v0.13.0 now.
+  A. Push v0.20.0 tag — `git tag v0.20.0 && git push --tags`. If
-  B. Smoke-test the new feel layer first (theme-aware backs, keyboard
+     the player wants the cut formalised before any new work.
-     drag, right-click radial, score-breakdown reveal, streak fire,
+  B. APK launch verification — `adb install` + `adb logcat` on
-     tooltip-delay slider), then tag.
+     bevy_test AVD or an x86_64 device. Now that persistence is
-  C. Skip the tag for another iteration round — see "next-round
+     wired (4b51e50), shake out remaining runtime bugs.
-     candidates" in SESSION_HANDOFF for fresh ideas.
+  C. Card-face artwork regeneration — generate Terminal-aesthetic
-  D. Take the deferred desktop-packaging item (needs artwork +
+     card PNGs (dark face, light suit pips), then migrate
-     signing certs from the user).
+     CARD_FACE_COLOUR / RED_SUIT_COLOUR / BLACK_SUIT_COLOUR /
+     CARD_FACE_COLOUR_RED_CBM in lockstep. Largest visible
+     payoff remaining in the visual-identity arc.
+  D. Splash boot-loader richness — port the scanline overlay,
+     ✓ check log, pulsing cursor, ROOT@SOLITAIRE prompt, and
+     loading bar from docs/ui-mockups/splash-mobile.html. Pure
+     polish; no behavioural change.
+  E. App icon round — re-run artwork/Icon Export.html (the
+     export PNGs are not currently in `artwork/`), then wire
+     Window::icon + generate .icns / .ico. Half-day task. No
+     cert dependency.
+  F. JNI ClipboardManager / Keystore bridge — replaces the
+     Android stubs for Stats clipboard share + sync auth.
 
 WORKFLOW NOTES:
-  - Commits use:
+  - Use the system git config (already correct).
-      git -c user.name=funman300 -c user.email=root@vscode.infinity \
+  - When attributing playtester feedback in commits/docs, use
-          commit -m "..."
+    "Quat" not "Rhys" (saved feedback memory).
   - Sub-agents stage + verify only; orchestrator commits.
   - Every commit must pass build / clippy / test before pushing.
-  - Push to GitHub (origin) — that is the canonical remote.
+  - Push to GitHub (origin) — gh auth setup-git wired on
+    primary dev box; verify on laptop before first push.
 
-OPEN AT THE START: ask which of A / B / C / D. Don't pick unilaterally.
+OPEN AT THE START: ask which of A–F. Don't pick unilaterally.
 ```

docs/ANDROID.md

@@ -0,0 +1,228 @@
+# Android build — developer setup
+
+This doc captures the toolchain install + build invocation for the
+Android target. Steps are runnable on a fresh Debian 13 (trixie) box;
+later sections document what's known to compile, what's stubbed, and
+the next milestones.
+
+> **Status (2026-05-07):** First working APK at `fb8b2ac`. 54 MB
+> debug-signed `solitaire-quest.apk` for `x86_64-linux-android`. Has
+> NOT yet been verified to launch on a device or emulator — that's
+> the next milestone.
+
+---
+
+## 1. Toolchain install (Debian 13 / trixie)
+
+Run as one block. Will pull ~15-20 GB of disk between APT, the SDK,
+the NDK, the system image, and Rust target sysroots. Requires sudo.
+
+```bash
+# 1. JDK 21 (Android tooling needs JDK 17+; Debian 13 default is 21).
+sudo apt update && sudo apt install -y openjdk-21-jdk-headless unzip wget
+
+# 2. SDK directory + Google's cmdline-tools bootstrap.
+export ANDROID_HOME="$HOME/Android/Sdk"
+mkdir -p "$ANDROID_HOME/cmdline-tools"
+wget -O /tmp/cmdline-tools.zip \
+  https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip
+unzip -q /tmp/cmdline-tools.zip -d "$ANDROID_HOME/cmdline-tools"
+mv "$ANDROID_HOME/cmdline-tools/cmdline-tools" "$ANDROID_HOME/cmdline-tools/latest"
+rm /tmp/cmdline-tools.zip
+
+# 3. Persist env vars.
+{
+  echo ''
+  echo '# Android dev'
+  echo 'export ANDROID_HOME="$HOME/Android/Sdk"'
+  echo 'export ANDROID_NDK_HOME="$ANDROID_HOME/ndk/26.3.11579264"'
+  echo 'export JAVA_HOME="$(dirname $(dirname $(readlink -f $(which java))))"'
+  echo 'export PATH="$PATH:$ANDROID_HOME/cmdline-tools/latest/bin:$ANDROID_HOME/platform-tools:$ANDROID_HOME/emulator"'
+} >> ~/.bashrc
+source ~/.bashrc
+
+# 4. Accept SDK licences (interactive prompts answered by `yes |`).
+yes | sdkmanager --licenses
+
+# 5. Platform packages — ~5 GB.
+sdkmanager \
+  "platform-tools" \
+  "platforms;android-34" \
+  "build-tools;34.0.0" \
+  "ndk;26.3.11579264" \
+  "emulator" \
+  "system-images;android-34;google_apis;x86_64"
+
+# 6. AVD for testing (one-time).
+echo no | avdmanager create avd \
+  -n bevy_test \
+  -k "system-images;android-34;google_apis;x86_64" \
+  -d pixel_7
+
+# 7. Rust cross-compile targets.
+rustup target add \
+  aarch64-linux-android \
+  armv7-linux-androideabi \
+  x86_64-linux-android \
+  i686-linux-android
+
+# 8. cargo-apk.
+cargo install cargo-apk
+```
+
+Sanity:
+
+```bash
+java --version | head -1            # openjdk 21.0.x
+adb --version | head -1             # 35.x or higher
+sdkmanager --list_installed | head  # build-tools, emulator, ndk, platforms, system-images
+avdmanager list avd | head          # bevy_test
+rustup target list --installed | grep android  # 4 targets
+cargo apk --help | head -5
+```
+
+If `sdkmanager --version` errors with `JAVA_HOME is not set`, the env
+section in step 3 didn't apply to your shell — `source ~/.bashrc`
+again or open a new terminal.
+
+### Optional: emulator runtime libs
+
+The Android emulator is dynamically linked against X11/GL/audio. If
+`emulator -list-avds` works but `emulator -avd bevy_test` complains
+about `libX11.so.6`, install:
+
+```bash
+sudo apt install -y \
+  libx11-6 libxcursor1 libxrandr2 libxi6 libxinerama1 libxxf86vm1 \
+  libgl1 libnss3 libpulse0 libxcomposite1
+```
+
+Headless emulator launch:
+
+```bash
+emulator -avd bevy_test -no-window -gpu swiftshader_indirect &
+adb wait-for-device && adb devices
+# Stop later:
+# adb -s emulator-5554 emu kill
+```
+
+Headless + software rendering is fine for "does it boot" smoke tests
+but useless for perf measurement — use a physical Pixel-class device
+over USB for real numbers.
+
+---
+
+## 2. Build the APK
+
+```bash
+cargo apk build -p solitaire_app --target x86_64-linux-android
+```
+
+Output:
+
+```
+target/debug/apk/solitaire-quest.apk
+```
+
+Targets shipped via `[package.metadata.android].build_targets` in
+`solitaire_app/Cargo.toml`:
+
+| Target | Use |
+|--------|-----|
+| `aarch64-linux-android` | Real phones (modern 64-bit ARM) |
+| `armv7-linux-androideabi` | Older 32-bit ARM phones |
+| `x86_64-linux-android` | The `bevy_test` AVD on this dev box |
+
+Build any of them with `--target <triple>`.
+
+### Known cosmetic warning
+
+After the APK is signed cargo-apk panics with:
+
+```
+thread 'main' panicked: Bin is not compatible with Cdylib
+```
+
+This happens AFTER the APK is on disk and signed. cargo-apk is
+trying to also wrap the desktop `[[bin]]` target. The APK is still
+valid. Work around with `--lib`:
+
+```bash
+cargo apk build -p solitaire_app --target x86_64-linux-android --lib
+```
+
+(Permanent fix to come — likely a `[[bin]] required-features = ["desktop"]`
+gate so cargo-apk skips the bin target on Android.)
+
+---
+
+## 3. Install + run
+
+Physical device:
+
+```bash
+adb devices                                    # confirm connection
+adb install target/debug/apk/solitaire-quest.apk
+adb shell am start -n com.solitairequest.app/android.app.NativeActivity
+adb logcat | grep -iE "RustStdoutStderr|solitaire|panic"
+```
+
+Emulator:
+
+```bash
+emulator -avd bevy_test -no-window -gpu swiftshader_indirect &
+adb wait-for-device
+adb install target/debug/apk/solitaire-quest.apk
+# ... same start + logcat steps as above.
+```
+
+If `adb install` errors with `INSTALL_FAILED_NO_MATCHING_ABIS`, the
+emulator is x86_64 but the APK was built for arm — rebuild with the
+`x86_64-linux-android` target, or add an x86_64 system image to the
+AVD.
+
+---
+
+## 4. What's wired vs. what's stubbed
+
+The first build pass (commit `fb8b2ac`) gates four desktop-only
+crates / call sites so the workspace cross-compiles. Each gate is
+documented at its call site.
+
+| Surface | Desktop | Android |
+|---------|---------|---------|
+| Bevy windowing | x11 + wayland | `android-native-activity` (NativeActivity glue) |
+| Clipboard ("Copy share link") | `arboard` writes URL | Toast surfaces the URL inline |
+| OS keychain (JWT tokens) | `keyring` v4 → Secret Service / Keychain / Credential Store | Stub returning `KeychainUnavailable`; sync requires fresh login each launch |
+| App entry point | `bin` target → `solitaire_app::run()` | `cdylib` target loaded by NativeActivity |
+
+What's NOT yet ported / not yet measured:
+
+- `dirs::data_dir()` returns `None` on Android. Callers in
+  `solitaire_data/src/storage.rs`, `progress.rs`, `replay.rs`,
+  `achievements.rs`, `settings.rs` all need an Android-aware
+  helper (likely `/data/data/com.solitairequest.app/files`).
+- Touch UX pass — hit-target sizes, modal scaling on small screens,
+  app lifecycle (suspend / resume), font scaling.
+- Android Keystore via JNI for `auth_tokens`.
+- JNI ClipboardManager for share links.
+- Google Play Games sign-in (the `solitaire_gpgs` crate referenced
+  in older docs doesn't yet exist).
+
+---
+
+## 5. Iteration loop
+
+```bash
+# Edit code…
+cargo build -p solitaire_app                           # desktop sanity
+cargo clippy --workspace --all-targets -- -D warnings  # gate
+cargo test --workspace                                 # gate
+cargo apk build -p solitaire_app --target x86_64-linux-android --lib
+adb install -r target/debug/apk/solitaire-quest.apk    # `-r` reinstalls
+adb logcat -c && adb shell am start -n com.solitairequest.app/android.app.NativeActivity
+adb logcat | grep -iE "RustStdoutStderr|solitaire"
+```
+
+`adb logcat` is the canonical way to see Bevy / Rust panic output —
+they end up in the `RustStdoutStderr` tag.

docs/ui-mockups/achievements-mobile.html

@@ -0,0 +1,293 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Achievements</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500;700&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-tertiary-container": "#683476",
+                        "surface-container-lowest": "#0b0f11",
+                        "error": "#fb9fb1",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-primary-fixed-variant": "#004c69",
+                        "background": "#101417",
+                        "error-container": "#93000a",
+                        "tertiary-container": "#e1a3ee",
+                        "inverse-primary": "#00668a",
+                        "highlight-valid": "#acc267",
+                        "suit-red": "#fb9fb1",
+                        "on-surface-variant": "#bfc8cf",
+                        "on-secondary": "#293500",
+                        "on-primary-container": "#004f6c",
+                        "surface-tint": "#7ed0fe",
+                        "on-surface": "#e0e3e6",
+                        "outline-variant": "#3f484e",
+                        "on-background": "#e0e3e6",
+                        "primary-fixed": "#c4e7ff",
+                        "inverse-surface": "#e0e3e6",
+                        "info": "#12cfc0",
+                        "inverse-on-surface": "#2d3134",
+                        "warning": "#ddb26f",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "on-secondary-container": "#b2c86d",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "highlight-celebration": "#e1a3ee",
+                        "surface": "#151515",
+                        "surface-container-highest": "#313538",
+                        "outline": "#505050",
+                        "on-primary": "#003549",
+                        "on-error-container": "#ffdad6",
+                        "surface-variant": "#313538",
+                        "on-error": "#690005",
+                        "suit-black": "#d0d0d0",
+                        "primary": "#a1dcff",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-bright": "#363a3d",
+                        "on-tertiary": "#4c195b",
+                        "surface-dim": "#101417",
+                        "primary-container": "#6fc2ef",
+                        "tertiary": "#f7c3ff",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "surface-container-high": "#272a2d",
+                        "on-secondary-fixed": "#161e00",
+                        "surface-container": "#1c2023",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "secondary-fixed": "#d5ec8c",
+                        "secondary-container": "#435401",
+                        "on-tertiary-fixed": "#340043",
+                        "on-primary-fixed": "#001e2c",
+                        "secondary": "#bad073",
+                        "surface-container-low": "#181c1f"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "stack-overlap": "2rem",
+                        "gutter-card": "0.375rem",
+                        "touch-target-min": "48dp",
+                        "margin-edge": "1rem",
+                        "action-bar-height": "64px"
+                    },
+                    "fontFamily": {
+                        "card-rank": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        body {
+            background-color: #151515;
+            color: #e0e3e6;
+            -webkit-font-smoothing: antialiased;
+        }
+        .scanline {
+            background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.1) 50%);
+            background-size: 100% 2px;
+            pointer-events: none;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="font-body-md text-body-md overflow-x-hidden pb-[action-bar-height]">
+<!-- Status Bar -->
+<header class="fixed top-0 w-full h-[32px] bg-[#202020] flex items-center justify-between px-margin-edge z-[60] border-b border-outline-variant">
+<div class="flex items-center gap-2 font-label-caps text-on-surface">
+<span class="text-primary">▌</span>achievements.json
+        </div>
+<div class="font-label-caps text-[#a0a0a0]">
+            8/19 UNLOCKED
+        </div>
+</header>
+<!-- Top App Bar (Shared Component Reference) -->
+<nav class="fixed top-[32px] w-full h-[64px] bg-surface flex items-center justify-between px-margin-edge z-50 border-b border-outline-variant">
+<div class="flex items-center gap-3">
+<span class="material-symbols-outlined text-primary" data-icon="terminal">terminal</span>
+<h1 class="font-headline text-[20px] text-primary uppercase tracking-widest">Rusty Solitaire</h1>
+</div>
+<button class="w-10 h-10 flex items-center justify-center hover:bg-surface-container-highest transition-colors">
+<span class="material-symbols-outlined text-on-surface-variant" data-icon="settings">settings</span>
+</button>
+</nav>
+<main class="mt-[112px] px-margin-edge">
+<!-- Hero Progress Card -->
+<section class="w-full h-[100px] bg-[#202020] border border-[#353535] rounded-lg p-4 mb-6">
+<div class="flex flex-col justify-between h-full">
+<span class="font-label-caps text-[10px] text-[#a0a0a0]">PROGRESS</span>
+<div class="flex items-baseline gap-2">
+<span class="font-headline text-[28px] font-bold text-[#d0d0d0]">8/19</span>
+<span class="font-label-caps text-[14px] text-highlight-celebration">(42%)</span>
+</div>
+<div class="w-full h-[4px] bg-[#353535] rounded-full overflow-hidden mt-1">
+<div class="h-full bg-highlight-celebration" style="width: 42%;"></div>
+</div>
+</div>
+</section>
+<!-- Filter Chip Row -->
+<section class="flex gap-2 mb-6 overflow-x-auto no-scrollbar">
+<button class="h-[32px] px-3 flex items-center justify-center border border-[#6fc2ef] text-[#6fc2ef] rounded-[4px] font-label-caps text-[11px]">
+                [ ALL ]
+            </button>
+<button class="h-[32px] px-3 flex items-center justify-center border border-outline text-[#a0a0a0] rounded-[4px] font-label-caps text-[11px] hover:border-primary hover:text-primary transition-colors">
+                UNLOCKED
+            </button>
+<button class="h-[32px] px-3 flex items-center justify-center border border-outline text-[#a0a0a0] rounded-[4px] font-label-caps text-[11px] hover:border-primary hover:text-primary transition-colors">
+                LOCKED
+            </button>
+<button class="h-[32px] px-3 flex items-center justify-center border border-outline text-[#a0a0a0] rounded-[4px] font-label-caps text-[11px] hover:border-primary hover:text-primary transition-colors">
+                SECRET
+            </button>
+</section>
+<!-- Achievements Grid -->
+<section class="grid grid-cols-2 gap-3 mb-10">
+<!-- FIRST WIN -->
+<div class="h-[100px] bg-[#202020] border border-[#353535] p-3 flex flex-col justify-between rounded-sm">
+<div class="w-8 h-8 rounded-full bg-[#6fc2ef] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#151515] text-[20px]" data-icon="emoji_events" style="font-variation-settings: 'FILL' 1;">emoji_events</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#d0d0d0] leading-none mb-1">FIRST WIN</h3>
+<p class="font-label-caps text-[10px] text-[#a0a0a0] leading-tight">Win your first game</p>
+</div>
+</div>
+<!-- SPEED DEMON -->
+<div class="h-[100px] bg-[#202020] border border-highlight-celebration p-3 flex flex-col justify-between rounded-sm relative">
+<div class="absolute inset-0 border border-highlight-celebration opacity-20 pointer-events-none"></div>
+<div class="w-8 h-8 rounded-full bg-[#6fc2ef] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#151515] text-[20px]" data-icon="speed" style="font-variation-settings: 'FILL' 1;">speed</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#d0d0d0] leading-none mb-1">SPEED DEMON</h3>
+<p class="font-label-caps text-[10px] text-[#a0a0a0] leading-tight">Win in under 3:00</p>
+</div>
+</div>
+<!-- STREAK 10 -->
+<div class="h-[100px] bg-[#202020] border border-[#353535] p-3 flex flex-col justify-between rounded-sm">
+<div class="w-8 h-8 rounded-full bg-[#6fc2ef] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#151515] text-[20px]" data-icon="bolt" style="font-variation-settings: 'FILL' 1;">bolt</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#d0d0d0] leading-none mb-1">STREAK 10</h3>
+<p class="font-label-caps text-[10px] text-[#a0a0a0] leading-tight">10 wins in a row</p>
+</div>
+</div>
+<!-- DAILY DEFENDER -->
+<div class="h-[100px] bg-[#202020] border border-[#353535] p-3 flex flex-col justify-between rounded-sm">
+<div class="w-8 h-8 rounded-full bg-[#6fc2ef] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#151515] text-[20px]" data-icon="calendar_today" style="font-variation-settings: 'FILL' 1;">calendar_today</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#d0d0d0] leading-none mb-1">DAILY DEFENDER</h3>
+<p class="font-label-caps text-[10px] text-[#a0a0a0] leading-tight">Complete 7 daily seeds</p>
+</div>
+</div>
+<!-- PERFECTIONIST (LOCKED) -->
+<div class="h-[100px] bg-[#0d0d0d] border border-[#353535] p-3 flex flex-col justify-between rounded-sm opacity-80">
+<div class="w-8 h-8 rounded-full border border-[#505050] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#505050] text-[20px]" data-icon="undo">undo</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#505050] leading-none mb-1">PERFECTIONIST</h3>
+<p class="font-label-caps text-[10px] text-[#353535] leading-tight">Win without using undo</p>
+</div>
+</div>
+<!-- CHALLENGE BEATEN (LOCKED) -->
+<div class="h-[100px] bg-[#0d0d0d] border border-[#353535] p-3 flex flex-col justify-between rounded-sm opacity-80">
+<div class="w-8 h-8 rounded-full border border-[#505050] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#505050] text-[20px]" data-icon="military_tech">military_tech</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#505050] leading-none mb-1">CHALLENGE BEATEN</h3>
+<p class="font-label-caps text-[10px] text-[#353535] leading-tight">Complete CHALLENGE mode</p>
+</div>
+</div>
+<!-- SECRET (LOCKED) -->
+<div class="h-[100px] bg-[#0d0d0d] border border-[#353535] p-3 flex flex-col justify-between rounded-sm opacity-80">
+<div class="w-8 h-8 rounded-full border border-[#505050] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#505050] text-[20px]" data-icon="help_outline">help_outline</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#505050] leading-none mb-1">????</h3>
+<p class="font-label-caps text-[10px] text-[#353535] leading-tight">SECRET · Hidden until unlocked</p>
+</div>
+</div>
+<!-- PAR HUNTER (LOCKED) -->
+<div class="h-[100px] bg-[#0d0d0d] border border-[#353535] p-3 flex flex-col justify-between rounded-sm opacity-80">
+<div class="w-8 h-8 rounded-full border border-[#505050] flex items-center justify-center">
+<span class="material-symbols-outlined text-[#505050] text-[20px]" data-icon="golf_course">golf_course</span>
+</div>
+<div>
+<h3 class="font-label-caps text-[13px] font-bold text-[#505050] leading-none mb-1">PAR HUNTER</h3>
+<p class="font-label-caps text-[10px] text-[#353535] leading-tight">Beat par on 50 games</p>
+</div>
+</div>
+</section>
+</main>
+<!-- Footer Status -->
+<footer class="fixed bottom-[action-bar-height] w-full h-[24px] bg-background border-t border-outline-variant flex items-center justify-between px-margin-edge z-40 text-[10px] font-label-caps">
+<div class="flex items-center">
+<span class="text-primary mr-1">▌</span>
+<span class="text-on-surface-variant">NORMAL</span>
+<span class="mx-2 text-outline">│</span>
+<span class="text-on-surface-variant">achievements</span>
+</div>
+<div class="flex gap-3">
+<div><span class="text-[#a0a0a0]">[F]</span> <span class="text-[#505050]">filter</span></div>
+<div><span class="text-[#a0a0a0]">[/]</span> <span class="text-[#505050]">search</span></div>
+</div>
+</footer>
+<!-- Bottom Navigation Bar (Shared Component Reference) -->
+<nav class="fixed bottom-0 w-full h-action-bar-height bg-surface-container flex justify-around items-center px-margin-edge z-50 border-t border-outline-variant">
+<button class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:text-primary hover:bg-surface-container-highest transition-colors active:scale-95">
+<span class="material-symbols-outlined" data-icon="power_settings_new">power_settings_new</span>
+<span class="font-label-caps text-[10px] mt-1">[Q] QUIT</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:text-primary hover:bg-surface-container-highest transition-colors active:scale-95">
+<span class="material-symbols-outlined" data-icon="add_box">add_box</span>
+<span class="font-label-caps text-[10px] mt-1">[N] NEW</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:text-primary hover:bg-surface-container-highest transition-colors active:scale-95">
+<span class="material-symbols-outlined" data-icon="undo">undo</span>
+<span class="font-label-caps text-[10px] mt-1">[U] UNDO</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:text-primary hover:bg-surface-container-highest transition-colors active:scale-95">
+<span class="material-symbols-outlined" data-icon="lightbulb">lightbulb</span>
+<span class="font-label-caps text-[10px] mt-1">[H] HINT</span>
+</button>
+</nav>
+<!-- CRT Overlay Effect (Visual Decoration) -->
+<div class="fixed inset-0 pointer-events-none z-[100] opacity-[0.03] scanline"></div>
+</body></html>

docs/ui-mockups/challenge-mode-mobile.html

@@ -0,0 +1,219 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=390, height=844, initial-scale=1.0" name="viewport"/>
+<title>Challenge Mode Menu</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500;700&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "inverse-surface": "#e0e3e6",
+                        "error-container": "#93000a",
+                        "tertiary": "#f7c3ff",
+                        "on-primary-container": "#004f6c",
+                        "on-surface": "#e0e3e6",
+                        "surface-dim": "#101417",
+                        "surface-container-high": "#272a2d",
+                        "surface-container-lowest": "#0b0f11",
+                        "secondary-container": "#435401",
+                        "suit-red": "#fb9fb1",
+                        "on-error": "#690005",
+                        "surface-container-low": "#181c1f",
+                        "surface-variant": "#313538",
+                        "surface-tint": "#7ed0fe",
+                        "primary-container": "#6fc2ef",
+                        "background": "#101417",
+                        "primary": "#a1dcff",
+                        "outline": "#505050",
+                        "suit-black": "#d0d0d0",
+                        "secondary-fixed": "#d5ec8c",
+                        "surface-container": "#202020",
+                        "on-tertiary-fixed": "#340043",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "outline-variant": "#3f484e",
+                        "on-surface-variant": "#bfc8cf",
+                        "error": "#fb9fb1",
+                        "on-primary-fixed": "#001e2c",
+                        "highlight-celebration": "#e1a3ee",
+                        "highlight-valid": "#acc267",
+                        "suit-red-cb": "#6fc2ef",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "primary-fixed": "#c4e7ff",
+                        "on-error-container": "#ffdad6",
+                        "tertiary-container": "#e1a3ee",
+                        "on-secondary": "#293500",
+                        "on-tertiary": "#4c195b",
+                        "on-background": "#e0e3e6",
+                        "secondary-fixed-dim": "#bad073",
+                        "secondary": "#bad073",
+                        "inverse-primary": "#00668a",
+                        "surface-bright": "#363a3d",
+                        "surface": "#151515",
+                        "on-tertiary-container": "#683476",
+                        "on-secondary-fixed": "#161e00",
+                        "inverse-on-surface": "#2d3134",
+                        "warning": "#ddb26f",
+                        "info": "#12cfc0",
+                        "surface-container-highest": "#313538",
+                        "on-primary-fixed-variant": "#004c69",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-secondary-container": "#b2c86d",
+                        "on-primary": "#003549"
+                    },
+                    "fontFamily": {
+                        "mono": ["JetBrains Mono", "monospace"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"]
+                    }
+                }
+            }
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        body {
+            background-color: #101417;
+            font-family: 'JetBrains Mono', monospace;
+        }
+        .retro-scanline {
+            background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
+            background-size: 100% 2px, 3px 100%;
+            pointer-events: none;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="flex items-center justify-center min-h-screen text-on-background overflow-hidden">
+<!-- Mobile Container (390x844) -->
+<div class="relative w-[390px] h-[844px] bg-background flex flex-col overflow-hidden border border-outline-variant">
+<!-- Status Bar -->
+<div class="h-[32px] bg-surface-container flex items-center justify-between px-4 text-[11px] font-mono border-b border-outline-variant shrink-0">
+<span class="text-suit-black">▌challenge.tsx</span>
+<span class="text-[#a0a0a0]">LV 12 · UNLOCKED</span>
+</div>
+<!-- Header -->
+<header class="h-[80px] px-margin-edge flex flex-col justify-center border-b border-outline-variant shrink-0">
+<h1 class="text-[24px] font-bold leading-tight text-suit-black">CHALLENGE MODE</h1>
+<p class="text-[12px] text-[#a0a0a0] mt-1">Curated puzzles · Beat par for bonus XP</p>
+</header>
+<!-- Stats Row -->
+<div class="mx-margin-edge mt-4 bg-surface-container rounded-[4px] p-3 flex items-center justify-between border border-outline-variant shrink-0">
+<div class="flex items-baseline gap-1">
+<span class="text-[14px] font-bold text-suit-black">DONE 8/24</span>
+<span class="text-[14px] font-bold text-highlight-celebration">(33%)</span>
+</div>
+<span class="text-outline-variant text-[14px]">│</span>
+<div class="text-[14px] font-bold text-suit-black">BEST AVG 03:42</div>
+<span class="text-outline-variant text-[14px]">│</span>
+<div class="text-[14px] font-bold text-highlight-valid">+1240 XP</div>
+</div>
+<!-- Scrollable List Area -->
+<div class="flex-1 overflow-y-auto px-margin-edge pt-4 space-y-3 pb-6">
+<!-- Card 1 -->
+<div class="h-[80px] bg-surface-container border border-outline rounded-[4px] flex relative overflow-hidden">
+<div class="w-[6px] h-full bg-warning"></div>
+<div class="flex-1 flex items-center justify-between px-4">
+<div class="flex flex-col">
+<span class="text-[14px] font-bold text-suit-black">DEEP STACK</span>
+<span class="text-[12px] text-on-surface-variant">Win with 0 stock · ★★★☆☆</span>
+</div>
+<div class="bg-highlight-valid px-2 py-1 rounded-[2px] text-background text-[11px] font-bold">
+                        ✓ DONE
+                    </div>
+</div>
+</div>
+<!-- Card 2 -->
+<div class="h-[80px] bg-surface-container border border-primary rounded-[4px] flex relative overflow-hidden">
+<div class="w-[6px] h-full bg-highlight-valid"></div>
+<div class="flex-1 flex items-center justify-between px-4">
+<div class="flex flex-col">
+<span class="text-[14px] font-bold text-suit-black">SPEED RUN</span>
+<span class="text-[12px] text-on-surface-variant">Win under 2:30 · ★★☆☆☆</span>
+</div>
+<div class="bg-primary px-2 py-1 rounded-[2px] text-background text-[11px] font-bold">
+                        ▶ ACTIVE
+                    </div>
+</div>
+</div>
+<!-- Card 3 -->
+<div class="h-[80px] bg-surface-container border border-outline rounded-[4px] flex relative overflow-hidden">
+<div class="w-[6px] h-full bg-suit-red"></div>
+<div class="flex-1 flex items-center justify-between px-4">
+<div class="flex flex-col">
+<span class="text-[14px] font-bold text-suit-black">NO UNDO</span>
+<span class="text-[12px] text-on-surface-variant">Win without undo · ★★★★☆</span>
+</div>
+<div class="bg-primary px-2 py-1 rounded-[2px] text-background text-[11px] font-bold">
+                        ▶ ACTIVE
+                    </div>
+</div>
+</div>
+<!-- Card 4 -->
+<div class="h-[80px] bg-surface-container border border-outline rounded-[4px] flex relative overflow-hidden">
+<div class="w-[6px] h-full bg-info"></div>
+<div class="flex-1 flex items-center justify-between px-4">
+<div class="flex flex-col">
+<span class="text-[14px] font-bold text-suit-black">FOUR SUITS</span>
+<span class="text-[12px] text-on-surface-variant">1 card per suit · ★☆☆☆☆</span>
+</div>
+<div class="bg-highlight-valid px-2 py-1 rounded-[2px] text-background text-[11px] font-bold">
+                        ✓ DONE
+                    </div>
+</div>
+</div>
+<!-- Card 5 (Locked) -->
+<div class="h-[80px] bg-surface-container border border-outline-variant rounded-[4px] flex relative overflow-hidden opacity-60">
+<div class="w-[6px] h-full bg-highlight-celebration"></div>
+<div class="flex-1 flex items-center justify-between px-4">
+<div class="flex flex-col">
+<span class="text-[14px] font-bold text-suit-black">PERFECT RUN</span>
+<span class="text-[12px] text-on-surface-variant">Below par moves · ★★★★★</span>
+</div>
+<div class="bg-outline px-2 py-1 rounded-[2px] text-on-surface text-[11px] font-bold">
+                        🔒 LOCKED
+                    </div>
+</div>
+</div>
+<!-- Filler Graphic for retro feel -->
+<div class="flex items-center justify-center py-4">
+<div class="h-[1px] flex-1 bg-outline-variant"></div>
+<span class="px-4 text-[10px] text-outline text-label-caps">END OF LIST</span>
+<div class="h-[1px] flex-1 bg-outline-variant"></div>
+</div>
+</div>
+<!-- Shared Component: Terminal Context (Used as Footer) -->
+<div class="h-[24px] bg-surface px-4 flex items-center justify-between text-[10px] font-mono border-t border-outline-variant shrink-0">
+<div class="flex items-center gap-2">
+<span class="text-primary">▌ NORMAL</span>
+<span class="text-outline">│</span>
+<span class="text-on-surface-variant uppercase tracking-widest">challenge</span>
+</div>
+<div class="text-[#a0a0a0] flex items-center gap-3">
+<span>[ENTER] select</span>
+<span>[F] filter</span>
+<span class="text-suit-red">[ESC] back</span>
+</div>
+</div>
+<!-- Retro Scanline Overlay -->
+<div class="absolute inset-0 retro-scanline z-50"></div>
+</div>
+</body></html>

docs/ui-mockups/daily-challenge-mobile.html

@@ -0,0 +1,258 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=390, height=844, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Daily Challenge</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500;600&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        body {
+            background-color: #101417;
+            color: #e0e3e6;
+            font-family: 'Inter', sans-serif;
+            -webkit-font-smoothing: antialiased;
+        }
+        .scanline-bg {
+            background: linear-gradient(to bottom, transparent 50%, rgba(26, 26, 26, 0.5) 50%);
+            background-size: 100% 4px;
+        }
+    </style>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "on-secondary-fixed": "#161e00",
+                        "on-error": "#690005",
+                        "on-primary-fixed": "#001e2c",
+                        "tertiary": "#f7c3ff",
+                        "secondary-fixed-dim": "#bad073",
+                        "primary-container": "#6fc2ef",
+                        "surface-dim": "#101417",
+                        "surface-variant": "#313538",
+                        "on-error-container": "#ffdad6",
+                        "warning": "#ddb26f",
+                        "on-surface": "#e0e3e6",
+                        "inverse-on-surface": "#2d3134",
+                        "surface-tint": "#7ed0fe",
+                        "error-container": "#93000a",
+                        "on-tertiary": "#4c195b",
+                        "info": "#12cfc0",
+                        "tertiary-fixed": "#fbd7ff",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "primary": "#a1dcff",
+                        "on-primary": "#003549",
+                        "inverse-surface": "#e0e3e6",
+                        "highlight-valid": "#acc267",
+                        "surface-container-low": "#181c1f",
+                        "surface-container": "#1c2023",
+                        "on-surface-variant": "#bfc8cf",
+                        "secondary-container": "#435401",
+                        "error": "#fb9fb1",
+                        "surface": "#151515",
+                        "primary-fixed": "#c4e7ff",
+                        "outline": "#505050",
+                        "surface-container-highest": "#313538",
+                        "on-secondary": "#293500",
+                        "on-primary-container": "#004f6c",
+                        "secondary-fixed": "#d5ec8c",
+                        "background": "#101417",
+                        "surface-container-high": "#272a2d",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-container-lowest": "#0b0f11",
+                        "suit-red": "#fb9fb1",
+                        "on-secondary-container": "#b2c86d",
+                        "outline-variant": "#3f484e",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "inverse-primary": "#00668a",
+                        "surface-bright": "#363a3d",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "tertiary-container": "#e1a3ee",
+                        "on-background": "#e0e3e6",
+                        "on-tertiary-container": "#683476",
+                        "suit-black": "#d0d0d0",
+                        "on-primary-fixed-variant": "#004c69",
+                        "secondary": "#bad073",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "on-tertiary-fixed": "#340043",
+                        "highlight-celebration": "#e1a3ee"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "gutter-card": "0.375rem",
+                        "stack-overlap": "2rem",
+                        "margin-edge": "1rem",
+                        "action-bar-height": "64px",
+                        "touch-target-min": "48dp"
+                    },
+                    "fontFamily": {
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "headline": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="flex flex-col min-h-screen max-w-[390px] mx-auto overflow-hidden shadow-2xl border-x border-outline">
+<!-- 1. Status Bar -->
+<div class="h-[32px] bg-[#202020] flex items-center justify-between px-margin-edge border-b border-outline">
+<span class="font-hud-timer text-[12px] text-on-surface-variant">▌daily/2024-127.json</span>
+<div class="bg-warning/10 border border-warning px-2 py-0.5 rounded-sm">
+<span class="font-hud-timer text-[11px] text-warning font-bold tracking-tighter">EXPIRES 11:42:30</span>
+</div>
+</div>
+<!-- Main Content Canvas -->
+<main class="flex-1 p-margin-edge space-y-4 overflow-y-auto pb-8">
+<!-- 2. Header Card -->
+<section class="h-[130px] bg-[#1a1a1a] border border-[#353535] rounded-lg p-4 flex flex-col justify-between">
+<div class="flex flex-col">
+<span class="font-headline font-bold text-[24px] text-suit-black leading-none">MAY 07 · 2026</span>
+<span class="font-headline font-extrabold text-[32px] text-highlight-valid -tracking-[0.01em] leading-tight">#2024-127</span>
+</div>
+<span class="font-label-caps text-[11px] text-on-surface-variant/70">DRAW-3 · DIFFICULTY ★★★☆☆ · PAR 04:30</span>
+</section>
+<!-- 3. Primary CTA -->
+<button class="w-full h-[64px] bg-primary-container text-surface font-headline font-bold text-[14px] uppercase tracking-wider rounded-lg active:scale-95 transition-transform duration-80 flex items-center justify-center gap-2">
+<span class="material-symbols-outlined text-[18px]">play_arrow</span>
+            ATTEMPT TODAY'S SEED
+        </button>
+<!-- 4. Your Attempts Card -->
+<section class="h-[96px] bg-[#202020] rounded-lg p-4 flex flex-col justify-between">
+<span class="font-label-caps text-[11px] text-on-surface-variant/60 uppercase">YOUR ATTEMPTS</span>
+<div class="flex justify-between items-end">
+<div class="flex flex-col">
+<span class="font-hud-score text-[16px] text-suit-black">BEST 04:12</span>
+<div class="flex items-center gap-2 mt-1">
+<span class="bg-warning text-surface text-[10px] font-bold px-1.5 py-0.5 rounded-sm">WIN</span>
+<span class="font-label-caps text-[11px] text-warning">RANK 17/2843</span>
+</div>
+</div>
+<span class="font-hud-timer text-[13px] text-error mb-1">LAST: FAILED at move 47</span>
+</div>
+</section>
+<!-- 5. Leaderboard Card -->
+<section class="bg-[#202020] rounded-lg p-4 flex flex-col flex-grow">
+<span class="font-label-caps text-[11px] text-on-surface-variant/60 uppercase mb-4">TOP TODAY · 2,843 PLAYERS</span>
+<div class="space-y-0 divide-y divide-[#353535]">
+<!-- Row 1 -->
+<div class="h-[32px] flex items-center justify-between">
+<div class="flex items-center gap-3">
+<span class="w-5 h-5 flex items-center justify-center bg-warning text-surface text-[10px] font-bold rounded-full">01</span>
+<span class="font-hud-timer text-[14px]">swift_jaguar</span>
+</div>
+<span class="font-hud-timer text-[14px] text-on-surface-variant">02:47</span>
+</div>
+<!-- Row 2 -->
+<div class="h-[32px] flex items-center justify-between">
+<div class="flex items-center gap-3">
+<span class="w-5 h-5 flex items-center justify-center bg-[#a0a0a0] text-surface text-[10px] font-bold rounded-full">02</span>
+<span class="font-hud-timer text-[14px]">base16_fan</span>
+</div>
+<span class="font-hud-timer text-[14px] text-on-surface-variant">03:12</span>
+</div>
+<!-- Row 3 -->
+<div class="h-[32px] flex items-center justify-between">
+<div class="flex items-center gap-3">
+<span class="w-5 h-5 flex items-center justify-center bg-[#7a5d3b] text-surface text-[10px] font-bold rounded-full">03</span>
+<span class="font-hud-timer text-[14px]">cli_player</span>
+</div>
+<span class="font-hud-timer text-[14px] text-on-surface-variant">03:54</span>
+</div>
+<!-- Row 4 -->
+<div class="h-[32px] flex items-center justify-between">
+<div class="flex items-center gap-3">
+<span class="w-5 h-5 flex items-center justify-center bg-[#353535] text-on-surface-variant text-[10px] font-bold rounded-full">04</span>
+<span class="font-hud-timer text-[14px]">tablejockey</span>
+</div>
+<span class="font-hud-timer text-[14px] text-on-surface-variant">04:01</span>
+</div>
+<!-- Row 5 -->
+<div class="h-[32px] flex items-center justify-between">
+<div class="flex items-center gap-3">
+<span class="w-5 h-5 flex items-center justify-center bg-[#353535] text-on-surface-variant text-[10px] font-bold rounded-full">05</span>
+<span class="font-hud-timer text-[14px]">vim_motions</span>
+</div>
+<span class="font-hud-timer text-[14px] text-on-surface-variant">04:05</span>
+</div>
+<!-- Row 17 (YOU) -->
+<div class="h-[36px] flex items-center justify-between bg-primary-container/10 -mx-4 px-4 border-y border-primary-container/20">
+<div class="flex items-center gap-3">
+<span class="w-5 h-5 flex items-center justify-center bg-primary-container text-surface text-[10px] font-bold rounded-full">17</span>
+<span class="font-hud-timer text-[14px] text-primary-container font-bold">(YOU) anonymous</span>
+</div>
+<span class="font-hud-timer text-[14px] text-primary-container font-bold">04:12</span>
+</div>
+</div>
+<div class="mt-4 flex-1 border-t border-[#353535] pt-4 flex flex-col items-center justify-center opacity-30 select-none">
+<span class="material-symbols-outlined text-[48px]">terminal</span>
+<span class="font-label-caps text-[10px] mt-2">END OF VISIBLE LOG</span>
+</div>
+</section>
+</main>
+<!-- 6. Footer Navigation -->
+<footer class="h-[24px] bg-background border-t border-outline flex items-center justify-between px-3">
+<div class="flex items-center gap-2">
+<span class="font-label-caps text-[10px] text-on-surface-variant">▌ NORMAL │ daily</span>
+</div>
+<div class="flex items-center gap-3">
+<span class="font-label-caps text-[9px] text-on-surface-variant/70"><span class="text-primary-container">[ENTER]</span> attempt</span>
+<span class="font-label-caps text-[9px] text-on-surface-variant/70"><span class="text-primary-container">[L]</span> full leaderboard</span>
+<span class="font-label-caps text-[9px] text-on-surface-variant/70"><span class="text-primary-container">[ESC]</span> back</span>
+</div>
+</footer>
+<!-- Shared Component Shell Rendering Logic -->
+<header class="w-full top-0 sticky bg-background border-b border-outline flex justify-between items-center px-margin-edge h-action-bar-height hidden">
+<div class="flex items-center gap-3">
+<span class="material-symbols-outlined text-primary">terminal</span>
+<h1 class="font-headline text-headline text-primary uppercase tracking-widest">RUSTY SOLITAIRE</h1>
+</div>
+<span class="material-symbols-outlined text-on-surface-variant hover:text-primary transition-colors duration-120 cursor-pointer">settings</span>
+</header>
+<nav class="fixed bottom-0 w-full h-action-bar-height z-50 bg-surface-container border-t border-outline flex justify-around items-center px-2 hidden">
+<div class="flex flex-col items-center justify-center text-on-surface-variant hover:bg-surface-container-highest transition-colors duration-120 cursor-pointer w-full h-full">
+<span class="material-symbols-outlined">refresh</span>
+<span class="font-label-caps text-label-caps">DEAL</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant hover:bg-surface-container-highest transition-colors duration-120 cursor-pointer w-full h-full">
+<span class="material-symbols-outlined">undo</span>
+<span class="font-label-caps text-label-caps">UNDO</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant hover:bg-surface-container-highest transition-colors duration-120 cursor-pointer w-full h-full">
+<span class="material-symbols-outlined">lightbulb</span>
+<span class="font-label-caps text-label-caps">HINT</span>
+</div>
+<div class="flex flex-col items-center justify-center text-primary dark:text-primary-fixed-dim hover:bg-surface-container-highest transition-colors duration-120 cursor-pointer w-full h-full">
+<span class="material-symbols-outlined">menu</span>
+<span class="font-label-caps text-label-caps">MENU</span>
+</div>
+</nav>
+</body></html>

docs/ui-mockups/design-system.md

@@ -0,0 +1,278 @@
+---
+name: Terminal
+colors:
+  surface: '#151515'
+  surface-dim: '#0d0d0d'
+  surface-bright: '#2a2a2a'
+  surface-container-lowest: '#0a0a0a'
+  surface-container-low: '#1a1a1a'
+  surface-container: '#202020'
+  surface-container-high: '#2a2a2a'
+  surface-container-highest: '#353535'
+  on-surface: '#d0d0d0'
+  on-surface-variant: '#a0a0a0'
+  inverse-surface: '#d0d0d0'
+  inverse-on-surface: '#151515'
+  outline: '#505050'
+  outline-variant: '#353535'
+  surface-tint: '#6fc2ef'
+  primary: '#6fc2ef'
+  on-primary: '#151515'
+  primary-container: '#1f3a4a'
+  on-primary-container: '#a8dcf5'
+  inverse-primary: '#0e6e99'
+  secondary: '#acc267'
+  on-secondary: '#151515'
+  secondary-container: '#2a3320'
+  on-secondary-container: '#c5d585'
+  tertiary: '#e1a3ee'
+  on-tertiary: '#151515'
+  tertiary-container: '#3a2a40'
+  on-tertiary-container: '#eec3f5'
+  error: '#fb9fb1'
+  on-error: '#151515'
+  error-container: '#4a2530'
+  on-error-container: '#fdc3ce'
+  background: '#151515'
+  on-background: '#d0d0d0'
+  surface-variant: '#353535'
+  suit-red: '#fb9fb1'
+  suit-black: '#d0d0d0'
+  suit-red-cb: '#6fc2ef'
+  highlight-valid: '#acc267'
+  highlight-celebration: '#e1a3ee'
+  highlight-warning: '#ddb26f'
+  highlight-info: '#12cfc0'
+typography:
+  hud-score:
+    fontFamily: JetBrains Mono
+    fontSize: 24px
+    fontWeight: '700'
+    lineHeight: 32px
+    letterSpacing: '-0.02em'
+  hud-timer:
+    fontFamily: JetBrains Mono
+    fontSize: 16px
+    fontWeight: '400'
+    lineHeight: 24px
+  card-rank:
+    fontFamily: JetBrains Mono
+    fontSize: 18px
+    fontWeight: '700'
+    lineHeight: 18px
+  body-md:
+    fontFamily: Inter
+    fontSize: 16px
+    fontWeight: '400'
+    lineHeight: 24px
+  label-caps:
+    fontFamily: JetBrains Mono
+    fontSize: 12px
+    fontWeight: '500'
+    lineHeight: 16px
+    letterSpacing: '0.08em'
+  headline:
+    fontFamily: JetBrains Mono
+    fontSize: 28px
+    fontWeight: '700'
+    lineHeight: 32px
+    letterSpacing: '-0.01em'
+rounded:
+  sm: 0.125rem
+  DEFAULT: 0.25rem
+  md: 0.5rem
+  lg: 0.75rem
+  xl: 1rem
+  full: 9999px
+spacing:
+  margin-edge: 1rem
+  gutter-card: 0.375rem
+  stack-overlap: 2rem
+  touch-target-min: 48dp
+---
+
+## Brand & Style
+
+The "Terminal" design system replaces the previous "Premium Solitaire" calm-indie aesthetic with a **retro-terminal / synthwave** identity. The intent is the visual confidence of a well-tuned terminal emulator (think Berkeley Mono dotfiles, base16-eighties, CRT phosphor): monospaced, dense, legible, snappy. It is *not* casino-glitz, *not* skeuomorphic felt, and *not* whimsical.
+
+The personality is **technical, deliberate, slightly playful**. Cards are flat with thin colored strokes; the HUD reads like a status bar; modals look like terminal panes. Motion is short and snap-easing — no bouncy springs. Long-session calm is preserved by keeping the chroma low and reserving saturated accents for *meaning* (CTAs, feedback, celebrations) rather than decoration.
+
+Influences: base16-eighties (Chris Kempson), Berkeley Mono, Vim/Neovim status lines, the iA Writer aesthetic, classic CRT phosphor with no chromatic aberration.
+
+## Palette
+
+The palette is base16-eighties — a 16-slot terminal palette where indices 00–07 form a monochrome ramp and 08–0F provide saturated accents. We map base16 slots to Material Design 3 token roles below.
+
+### Source palette (base16-eighties)
+
+| Slot | Hex | Role |
+|---|---|---|
+| base00 | `#151515` | background |
+| base01 | `#202020` | surface-container |
+| base02 | `#303030` | line-highlight (subtle) |
+| base03 | `#505050` | outline / muted text |
+| base04 | `#b0b0b0` | secondary text |
+| base05 | `#d0d0d0` | foreground / on-surface |
+| base06 | `#e0e0e0` | bright text |
+| base07 | `#f5f5f5` | brightest highlight |
+| base08 | `#fb9fb1` | red — used for `error`, `suit-red` |
+| base09 | `#ddb26f` | orange — used for warning chips |
+| base0A | `#acc267` | yellow/lime — used for `highlight-valid` (drag targets, valid moves) |
+| base0B | `#12cfc0` | green/teal — used for `highlight-info` (toasts, neutral status) |
+| base0C | `#6fc2ef` | cyan/sky — primary CTA, focus ring, `selection`, `suit-red-cb` (color-blind tinted red) |
+| base0D | `#6fc2ef` | (alias) |
+| base0E | `#e1a3ee` | violet — used for celebration (level-up, achievement unlock) |
+| base0F | `#fb9fb1` | (alias) |
+
+### Semantic assignments
+
+- **CTA / Primary action**: cyan `#6fc2ef`. Reserved for "Play," "New Game," "Save," "Resume," and the focus ring on selected cards. Never used decoratively.
+- **Valid-move / drag-target highlight**: lime `#acc267`. Reserved for in-game feedback only. Never appears in chrome.
+- **Celebration**: lavender `#e1a3ee`. Used for level-up flashes, achievement unlock cards, and the daily-streak chip when the streak is active. Quiet otherwise.
+- **Warning / soft alert**: gold `#ddb26f`. Used for "challenge expires in N minutes" chips, sync-pending status, and the daily-seed countdown.
+- **Info**: teal `#12cfc0`. Used for neutral system toasts and the sync-connected indicator.
+- **Error**: pink `#fb9fb1`. Used for sync conflict, server unreachable, invalid move shake.
+
+## Suit Colors
+
+**Two-color traditional mapping**, with mandatory color-blind support:
+
+| Suit | Default | Color-blind mode | Glyph differentiation |
+|---|---|---|---|
+| Hearts | `#fb9fb1` (pink) | `#6fc2ef` (cyan) | Solid filled glyph |
+| Diamonds | `#fb9fb1` (pink) | `#6fc2ef` (cyan) | **Outlined glyph (1.5px stroke)** |
+| Spades | `#d0d0d0` (foreground) | `#d0d0d0` | Solid filled glyph |
+| Clubs | `#d0d0d0` (foreground) | `#d0d0d0` | **Outlined glyph (1.5px stroke)** |
+
+The outlined-glyph treatment is the **primary** differentiation mechanism. Color is supplementary. This means a player viewing the game on a monochrome display, or with severe red-green deficiency, can still distinguish all four suits without context. This is a hard requirement, not an optional setting.
+
+The "color-blind mode" toggle in Settings only swaps red→cyan; it does not turn the outlined glyphs on or off, because outlined glyphs are always on.
+
+## Typography
+
+**Monospace-forward, dual-font system.**
+
+- **JetBrains Mono** is used for: HUD (score, timer, moves), card rank/value text, all labels, all headlines, all numerals anywhere in the app, and any chip-style component. This is the dominant face.
+- **Inter** is used only for: long-form body copy (Help screen, Settings descriptions, achievement tooltips, onboarding copy). It is the *exception*, not the default.
+
+Weights: 400 regular, 500 medium for labels, 700 bold for HUD numbers and headlines. No 600 / no italics anywhere — the terminal aesthetic doesn't have them.
+
+Letter spacing: tight (`-0.02em`) on HUD score for visual mass; wide (`+0.08em`) on uppercase labels for readability at 12px. Body uses default (0).
+
+HUD numbers must use **tabular figures** (`font-feature-settings: 'tnum'`) so the timer and score don't reflow as digits change.
+
+## Layout & Spacing
+
+Optimized for **Android portrait, 390×844 (Pixel 6 baseline), API 34**.
+
+- **Margins**: 16px (1rem) edge safety margin. *Tighter than the previous system's 24px.* Eighties palettes are dense by nature; over-padding fights the aesthetic.
+- **Tableau**: 7-column layout, 32px (2rem) vertical card overlap. Tighter than before to fit a longer cascade on phone screens.
+- **HUD position**: top of screen, in the system safe area. Bottom 64px holds the action bar (Undo / Hint / New Game / Auto-complete). Action bar is **always visible** in-game — no hover-fade — because there is no hover on touch.
+- **Touch target minimum**: 48dp on all interactive elements. Cards in the tableau may be smaller visually but use a 48dp invisible hit area centered on the visible glyph.
+
+## Elevation & Depth
+
+Depth is created through **tonal layering and 1px outlines**, not blur shadows. (Synthwave-flat, not Material-soft.)
+
+- **Level 0 (Background)**: the `#151515` base canvas.
+- **Level 1 (Tableau slots, empty piles)**: 1px dashed outline in `#353535`. Empty foundations show a faint suit glyph at 12% opacity inside the outline.
+- **Level 2 (Cards at rest)**: solid `#1a1a1a` fill, 1px solid border in the suit color (so the suit is detectable at a glance even if the card is partially obscured).
+- **Level 3 (Active / dragged card)**: same border, but glow effect: 0 0 12px of `#6fc2ef` at 40% opacity. **No scale transform** — flatness preserved. Z-index lifts above siblings.
+- **Modals**: full-screen with backdrop `#151515` at 95% opacity (just enough to dim the table without blurring it). Modal panel is `#202020` with a 1px `#505050` border — like a terminal pane.
+- **Toasts**: bottom of screen, `#202020` fill, 1px border in the toast's accent color (info=teal, warning=gold, error=pink, celebration=lavender). 16px monospaced caption.
+
+No `box-shadow` is used anywhere. **All depth is achieved with borders and tonal value.** This is a hard constraint.
+
+## Shapes
+
+The shape language is **soft-rounded but tight**:
+
+- **Cards**: `rounded-md` (8px) — slightly less rounded than the previous system's 16px to read more "technical."
+- **Buttons / chips / inputs**: `rounded` (4px) default, `rounded-sm` (2px) for the smallest chips.
+- **Modals / sheets**: `rounded-lg` (12px).
+- **Avatars / circular indicators**: `rounded-full`.
+- **Card-back pattern corners**: matches the card's `rounded-md`.
+
+Selection highlights use a **2px inset stroke** in `#6fc2ef` following the host shape's corner radius. Never an outer stroke — the outer stroke is reserved for the suit-color hairline.
+
+## Motion
+
+**Snappy, no spring.** All transitions use `ease-out` with a 120ms duration unless specified.
+
+- Card lift (start drag): 80ms.
+- Card place (drop): 120ms with a 16ms holdframe (no bounce).
+- Modal enter: 200ms ease-out, fade + 8px translate-up.
+- Modal exit: 120ms ease-in, fade only.
+- Selection ring appear: 80ms.
+- Win-summary stat reveal: 60ms each, staggered 40ms.
+- HUD number tick: instant (no transition) — terminal counters don't ease.
+
+**Optional CRT effect**: a 1-frame scanline sweep across the screen on game-state transitions (start, win, restart). User-toggleable in Settings. Off by default.
+
+## Components
+
+### Game Cards
+
+Flat face design.
+- Background: `#1a1a1a`
+- Border: 1px solid in suit color (pink for hearts/diamonds, foreground gray for spades/clubs)
+- Top-left: rank in JetBrains Mono Bold 18px + small suit glyph (10px)
+- Bottom-right: large suit glyph (32px), rotated 180°
+- Corner radius: 8px
+- Suit differentiation: hearts and spades have **filled** glyphs; diamonds and clubs have **outlined** glyphs (1.5px stroke)
+
+### Card Back ("Terminal" theme)
+
+- Theme name: `"Terminal"`
+- Author: `"Rusty Solitaire"`
+- Background: `#151515`
+- Pattern: horizontal scanlines at 2px pitch in `#1a1a1a` (1px line, 1px gap), full bleed
+- Border: 1px solid `#353535`
+- Top-left badge: a 12×16px solid `#6fc2ef` block (the "terminal cursor"), 6px from the corner
+- Bottom-right monogram: the characters `▌RS` in JetBrains Mono 12px, color `#505050`, 6px from the corner
+- Corner radius: 8px (matches face)
+
+### Primary Buttons
+
+Solid `#6fc2ef` fill, `#151515` text, JetBrains Mono Medium 14px uppercase with `+0.08em` tracking. 4px corner radius. Pressed state: darken to `#5aa9d4`. Disabled: `#353535` fill, `#505050` text.
+
+### Secondary Buttons
+
+Transparent fill, 1px `#505050` border, `#d0d0d0` text. Hover/press: border becomes `#6fc2ef`, text becomes `#6fc2ef`.
+
+### HUD Chips
+
+`#202020` fill, no border, 4px radius. Monospaced 16px text. Score chip pulses to `#acc267` for 200ms when score increases.
+
+### Drag Targets
+
+When a card is being dragged over a valid pile, the pile's empty-slot dashed outline becomes:
+- Solid 1px in `#acc267`
+- Plus a 0 0 8px outer glow in `#acc267` at 30% opacity
+
+This is the *only* place glow effects appear in the system.
+
+### Modals
+
+Full-screen backdrop at 95% opacity. Centered panel: `#202020` fill, 1px `#505050` border, 12px corner radius. Title bar shows the screen name in monospaced 14px, color `#a0a0a0`, with a single `▌` cursor character prefix to reinforce the terminal pane motif.
+
+### Navigation Bar
+
+Fixed at the bottom of in-game screens. Height: 64px. `#202020` fill, 1px top border in `#353535`. Four icon buttons: Undo / Hint / New / Auto-complete. Icons: 24px, 1.5px stroke weight, color `#d0d0d0`. Active/pressed: icon color `#6fc2ef`.
+
+### Status / Sync Indicator
+
+Top-right corner of the HUD: a 6px circular dot.
+- Connected & synced: `#12cfc0`
+- Pending: `#ddb26f` (pulsing 1.5s)
+- Error: `#fb9fb1` (steady)
+- Offline: `#505050`
+
+## Accessibility
+
+1. **Color-blind mode** (Settings → Gameplay): swaps red suits' default `#fb9fb1` for `#6fc2ef`. Outlined-glyph differentiation remains active in *all* modes.
+2. **High-contrast mode** (Settings → Gameplay): boosts on-surface from `#d0d0d0` to `#f5f5f5`, outline from `#505050` to `#a0a0a0`, suit-red from `#fb9fb1` to `#ff8aa0`.
+3. **Reduce-motion mode** (Settings → Gameplay): disables card-lift transition (instant z-lift), disables CRT scanline effect, disables the warning-chip pulse animation.
+4. **Tabular figures** are mandatory for any number that updates live (timer, score, moves) so they don't reflow.
+5. **Touch targets** are 48dp minimum even when the visual element is smaller.
+6. **Text contrast**: all body text on background passes WCAG AA at minimum (`#d0d0d0` on `#151515` = 9.5:1; `#a0a0a0` on `#151515` = 5.7:1).

docs/ui-mockups/game-table-mobile.html

@@ -0,0 +1,253 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .outlined-glyph {
+            -webkit-text-stroke: 1.5px currentColor;
+            color: transparent;
+        }
+        .scanline-pattern {
+            background: repeating-linear-gradient(
+                0deg,
+                #1a1a1a,
+                #1a1a1a 2px,
+                #151515 2px,
+                #151515 4px
+            );
+        }
+        .tabular-nums {
+            font-variant-numeric: tabular-nums;
+        }
+    </style>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "surface": "#151515",
+                        "secondary-fixed": "#d5ec8c",
+                        "warning": "#ddb26f",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "on-background": "#e0e3e6",
+                        "on-primary-container": "#004f6c",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-surface": "#e0e3e6",
+                        "error": "#fb9fb1",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "inverse-primary": "#00668a",
+                        "surface-container-high": "#272a2d",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-bright": "#363a3d",
+                        "on-primary": "#003549",
+                        "on-tertiary": "#4c195b",
+                        "error-container": "#93000a",
+                        "on-tertiary-fixed": "#340043",
+                        "surface-container": "#202020",
+                        "tertiary-container": "#e1a3ee",
+                        "on-primary-fixed-variant": "#004c69",
+                        "surface-container-highest": "#313538",
+                        "highlight-celebration": "#e1a3ee",
+                        "highlight-valid": "#acc267",
+                        "primary": "#a1dcff",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-primary-fixed": "#001e2c",
+                        "on-error-container": "#ffdad6",
+                        "secondary": "#bad073",
+                        "on-tertiary": "#293500",
+                        "on-secondary-container": "#b2c86d",
+                        "inverse-on-surface": "#2d3134",
+                        "on-error": "#690005",
+                        "info": "#12cfc0",
+                        "suit-red": "#fb9fb1",
+                        "surface-dim": "#101417",
+                        "surface-tint": "#7ed0fe",
+                        "background": "#101417",
+                        "secondary-container": "#435401",
+                        "surface-variant": "#313538",
+                        "outline-variant": "#3f484e",
+                        "on-surface-variant": "#bfc8cf",
+                        "primary-fixed": "#c4e7ff",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-secondary-fixed": "#161e00",
+                        "suit-black": "#d0d0d0"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "touch-target-min": "48px",
+                        "margin-edge": "1rem",
+                        "action-bar-height": "64px",
+                        "stack-overlap": "2rem",
+                        "gutter-card": "0.375rem"
+                    },
+                    "fontFamily": {
+                        "label-caps": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "hud-score": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface text-on-surface font-body-md overflow-hidden selection:bg-primary selection:text-surface">
+<!-- TopAppBar -->
+<header class="fixed top-0 w-full flex justify-between items-center px-margin-edge h-[56px] bg-surface-container border-b border-outline dark:border-outline z-50">
+<div class="flex items-center gap-2">
+<span class="material-symbols-outlined text-primary">terminal</span>
+<h1 class="font-hud-score text-[18px] text-primary">solitaire.sh</h1>
+</div>
+<div class="flex items-center gap-4">
+<div class="w-[6px] h-[6px] rounded-full bg-info"></div>
+<span class="material-symbols-outlined text-on-surface-variant">settings</span>
+</div>
+</header>
+<!-- HUD Band -->
+<div class="fixed top-[56px] left-0 w-full h-[56px] bg-surface-container border-b border-outline-variant flex items-center justify-around px-margin-edge z-40">
+<div class="bg-surface p-1 px-3 rounded flex flex-col items-center">
+<span class="font-label-caps text-[10px] text-on-surface-variant">SCORE</span>
+<span class="font-hud-score text-primary tabular-nums">247</span>
+</div>
+<div class="bg-surface p-1 px-3 rounded flex flex-col items-center border border-outline">
+<span class="font-label-caps text-[10px] text-on-surface-variant">TIME</span>
+<span class="font-hud-timer text-on-surface tabular-nums">12:34</span>
+</div>
+<div class="bg-surface p-1 px-3 rounded flex flex-col items-center">
+<span class="font-label-caps text-[10px] text-on-surface-variant">MOVES</span>
+<span class="font-hud-score text-secondary tabular-nums">87</span>
+</div>
+</div>
+<!-- Main Game Table -->
+<main class="pt-[124px] px-margin-edge h-screen w-full relative">
+<!-- Top Row: Stock, Waste, Foundations -->
+<div class="grid grid-cols-7 gap-gutter-card h-[110px]">
+<!-- Stock -->
+<div class="relative w-full h-full rounded-xl border border-outline-variant bg-surface overflow-hidden scanline-pattern">
+<div class="absolute top-1 left-1 w-3 h-4 bg-suit-red-cb"></div>
+<div class="absolute bottom-1 right-1 font-label-caps text-[8px] text-suit-black">▌RS</div>
+<div class="absolute bottom-[-16px] left-0 w-full text-center font-label-caps text-[10px] text-on-surface-variant">STOCK · 18</div>
+</div>
+<!-- Waste -->
+<div class="relative w-full h-full rounded-xl border border-suit-red bg-[#1a1a1a] flex flex-col justify-between p-1.5">
+<div class="font-card-rank text-suit-red leading-none">10<br/><span class="font-normal">♥</span></div>
+<div class="self-end text-[32px] font-card-rank text-suit-red rotate-180">♥</div>
+</div>
+<!-- Empty Gap -->
+<div></div>
+<!-- Foundation S -->
+<div class="relative w-full h-full rounded-xl border border-dashed border-outline-variant flex items-center justify-center">
+<span class="text-on-surface-variant opacity-20 text-[32px] font-card-rank">♠</span>
+</div>
+<!-- Foundation H -->
+<div class="relative w-full h-full rounded-xl border border-suit-red bg-[#1a1a1a] flex flex-col justify-between p-1.5">
+<div class="font-card-rank text-suit-red leading-none">2<br/><span class="font-normal">♥</span></div>
+<div class="self-end text-[32px] font-card-rank text-suit-red rotate-180">♥</div>
+</div>
+<!-- Foundation C -->
+<div class="relative w-full h-full rounded-xl border border-dashed border-outline-variant flex items-center justify-center">
+<span class="text-on-surface-variant opacity-20 text-[32px] font-card-rank outlined-glyph">♣</span>
+</div>
+<!-- Foundation D -->
+<div class="relative w-full h-full rounded-xl border border-dashed border-outline-variant flex items-center justify-center">
+<span class="text-on-surface-variant opacity-20 text-[32px] font-card-rank outlined-glyph">♦</span>
+</div>
+</div>
+<!-- Tableau -->
+<div class="mt-8 grid grid-cols-7 gap-gutter-card items-start relative h-[400px]">
+<!-- Col 1 -->
+<div class="relative w-full h-full">
+<div class="w-full h-[96px] rounded-xl border border-suit-black bg-[#1a1a1a] p-1.5">
+<div class="font-card-rank text-suit-black leading-none">K<br/><span class="font-normal">♠</span></div>
+</div>
+</div>
+<!-- Col 2 -->
+<div class="relative w-full h-full">
+<div class="w-full h-[96px] rounded-xl border border-outline bg-[#1a1a1a] scanline-pattern"></div>
+<div class="absolute top-[32px] w-full h-[96px] rounded-xl border border-suit-red bg-[#1a1a1a] p-1.5">
+<div class="font-card-rank text-suit-red leading-none">Q<br/><span class="font-normal">♥</span></div>
+</div>
+</div>
+<!-- Col 3 -->
+<div class="relative w-full h-full">
+<div class="w-full h-[96px] rounded-xl border border-outline bg-[#1a1a1a] scanline-pattern"></div>
+<div class="absolute top-[32px] w-full h-[96px] rounded-xl border border-outline bg-[#1a1a1a] scanline-pattern"></div>
+<div class="absolute top-[64px] w-full h-[96px] rounded-xl border border-suit-red bg-[#1a1a1a] p-1.5">
+<div class="font-card-rank text-suit-red leading-none">10<br/><span class="font-normal outlined-glyph">♦</span></div>
+</div>
+</div>
+<!-- Col 4 -->
+<div class="relative w-full h-full">
+<div class="w-full h-[96px] rounded-xl border border-outline bg-[#1a1a1a] scanline-pattern"></div>
+<div class="w-full h-[96px] rounded-xl border border-outline bg-[#1a1a1a] scanline-pattern absolute top-[32px]"></div>
+<!-- Valid Drop Target Glow -->
+<div class="absolute top-[64px] w-full h-[96px] rounded-xl border border-suit-black bg-[#1a1a1a] p-1.5 ring-4 ring-highlight-valid/30">
+<div class="font-card-rank text-suit-black leading-none">9<br/><span class="font-normal">♠</span></div>
+</div>
+</div>
+<!-- Col 5, 6 (Empty/Filler) -->
+<div class="relative w-full"></div>
+<div class="relative w-full"></div>
+<!-- Col 7 -->
+<div class="relative w-full">
+<!-- Original Position Placeholder -->
+<div class="w-full h-[96px] rounded-xl border border-dashed border-outline"></div>
+<!-- Being Dragged Card -->
+<div class="absolute top-[-20px] left-[30px] w-full h-[96px] rounded-xl border border-suit-red bg-[#1a1a1a] p-1.5 shadow-[0_0_20px_rgba(111,194,239,0.4)] z-50 ring-1 ring-primary/40">
+<div class="font-card-rank text-suit-red leading-none">4<br/><span class="font-normal outlined-glyph">♦</span></div>
+<div class="absolute bottom-1 right-1 text-[24px] font-card-rank text-suit-red rotate-180 outlined-glyph">♦</div>
+</div>
+</div>
+</div>
+</main>
+<!-- BottomNavBar / Action Bar -->
+<nav class="fixed bottom-0 left-0 w-full h-action-bar-height bg-surface-container border-t border-outline-variant flex justify-around items-center px-margin-edge z-50">
+<button class="flex flex-col items-center justify-center text-on-surface-variant hover:text-info transition-colors duration-120 active:opacity-80">
+<span class="material-symbols-outlined" data-icon="menu">menu</span>
+<span class="font-label-caps text-[10px] mt-1">[ESC] MENU</span>
+</button>
+<button class="flex flex-col items-center justify-center text-info font-bold active:opacity-80">
+<span class="material-symbols-outlined" data-icon="undo">undo</span>
+<span class="font-label-caps text-[10px] mt-1">[U] UNDO</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant hover:text-info transition-colors duration-120 active:opacity-80">
+<span class="material-symbols-outlined" data-icon="lightbulb">lightbulb</span>
+<span class="font-label-caps text-[10px] mt-1">[H] HINT</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant hover:text-info transition-colors duration-120 active:opacity-80">
+<span class="material-symbols-outlined" data-icon="add_box">add_box</span>
+<span class="font-label-caps text-[10px] mt-1">[N] NEW</span>
+</button>
+</nav>
+<!-- Drag & CRT Overlay (Visual Decoration) -->
+<div class="pointer-events-none fixed inset-0 z-[100] opacity-[0.03] scanline-pattern mix-blend-overlay"></div>
+</body></html>

docs/ui-mockups/help-mobile.html

@@ -0,0 +1,200 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "on-secondary-container": "#b2c86d",
+                        "secondary-fixed-dim": "#bad073",
+                        "surface-tint": "#7ed0fe",
+                        "on-surface-variant": "#bfc8cf",
+                        "surface-container-low": "#181c1f",
+                        "secondary-fixed": "#d5ec8c",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "secondary": "#bad073",
+                        "tertiary-container": "#e1a3ee",
+                        "inverse-on-surface": "#2d3134",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-error-container": "#ffdad6",
+                        "on-primary-fixed-variant": "#004c69",
+                        "secondary-container": "#435401",
+                        "background": "#101417",
+                        "surface-variant": "#313538",
+                        "on-primary-container": "#004f6c",
+                        "highlight-valid": "#acc267",
+                        "outline-variant": "#3f484e",
+                        "on-background": "#e0e3e6",
+                        "surface-bright": "#363a3d",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "on-secondary-fixed": "#161e00",
+                        "surface-dim": "#101417",
+                        "on-surface": "#e0e3e6",
+                        "info": "#12cfc0",
+                        "on-secondary": "#293500",
+                        "suit-red": "#fb9fb1",
+                        "error": "#fb9fb1",
+                        "error-container": "#93000a",
+                        "surface-container": "#202020",
+                        "primary-fixed": "#c4e7ff",
+                        "warning": "#ddb26f",
+                        "tertiary": "#f7c3ff",
+                        "highlight-celebration": "#e1a3ee",
+                        "tertiary-fixed": "#fbd7ff",
+                        "inverse-surface": "#e0e3e6",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "primary-container": "#6fc2ef",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-tertiary": "#4c195b",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-container-highest": "#313538",
+                        "on-primary-fixed": "#001e2c",
+                        "surface-container-high": "#272a2d",
+                        "primary": "#a1dcff",
+                        "suit-black": "#d0d0d0",
+                        "on-tertiary-container": "#683476",
+                        "on-error": "#690005",
+                        "inverse-primary": "#00668a",
+                        "on-tertiary-fixed": "#340043",
+                        "outline": "#505050",
+                        "on-primary": "#003549",
+                        "surface": "#151515"
+                    },
+                    "fontFamily": {
+                        "jetbrains": ["JetBrains Mono", "monospace"],
+                        "inter": ["Inter", "sans-serif"]
+                    }
+                }
+            }
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+            vertical-align: middle;
+            font-size: 16px;
+        }
+        .tabular-nums { font-variant-numeric: tabular-nums; }
+        body { background-color: #151515; }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="flex items-center justify-center min-h-screen p-4">
+<!-- Mobile Container (390x844) -->
+<div class="w-[390px] h-[844px] bg-surface flex flex-col overflow-hidden relative border border-outline/20">
+<!-- 1. Status Bar -->
+<header class="h-[32px] bg-surface-container flex items-center justify-between px-4 shrink-0">
+<span class="font-jetbrains text-[12px] font-bold text-suit-black tracking-tight">▌rusty-solitaire(1) · MAN PAGE</span>
+<button class="font-jetbrains text-[12px] font-bold text-suit-black/60 hover:text-primary transition-colors">× CLOSE</button>
+</header>
+<!-- 2. Heading Band -->
+<div class="h-[120px] px-4 pt-10 pb-4 shrink-0">
+<h1 class="font-jetbrains font-bold text-[24px] text-suit-black leading-none mb-1">GESTURES &amp; SHORTCUTS</h1>
+<p class="font-inter text-[13px] text-on-surface-variant/80">Touch gestures and keyboard equivalents.</p>
+</div>
+<!-- Scrollable Content Section -->
+<main class="flex-1 overflow-y-auto px-4 pb-8 space-y-6">
+<!-- 3a. TOUCH GESTURES -->
+<section class="space-y-3">
+<h2 class="font-jetbrains text-[11px] font-medium tracking-widest text-on-surface-variant/60 uppercase">TOUCH GESTURES</h2>
+<div class="space-y-1">
+<!-- Row 1 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] flex items-center gap-2">
+<span class="material-symbols-outlined text-suit-black" data-icon="square">square</span>
+<span class="font-jetbrains text-[13px] font-medium text-suit-black uppercase">TAP card</span>
+</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Select / unselect for move</div>
+</div>
+<!-- Row 2 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] flex items-center gap-2">
+<span class="material-symbols-outlined text-suit-black" data-icon="east">east</span>
+<span class="font-jetbrains text-[13px] font-medium text-suit-black uppercase">DRAG stack</span>
+</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Move with translucent ghost preview</div>
+</div>
+<!-- Row 3 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] flex items-center gap-2">
+<span class="material-symbols-outlined text-suit-black" data-icon="double_arrow">double_arrow</span>
+<span class="font-jetbrains text-[13px] font-medium text-suit-black uppercase">DOUBLE-TAP</span>
+</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Auto-send to best foundation</div>
+</div>
+<!-- Row 4 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] flex items-center gap-2">
+<span class="material-symbols-outlined text-suit-black" data-icon="touch_app">touch_app</span>
+<span class="font-jetbrains text-[13px] font-medium text-suit-black uppercase">LONG-PRESS</span>
+</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Highlight all legal moves for card</div>
+</div>
+<!-- Row 5 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] flex items-center gap-2">
+<span class="material-symbols-outlined text-suit-black" data-icon="south">south</span>
+<span class="font-jetbrains text-[13px] font-medium text-suit-black uppercase">SWIPE DOWN</span>
+</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Reveal hidden action bar</div>
+</div>
+</div>
+</section>
+<!-- 3b. KEYBOARD SHORTCUTS -->
+<section class="space-y-3">
+<h2 class="font-jetbrains text-[11px] font-medium tracking-widest text-on-surface-variant/60 uppercase">KEYBOARD SHORTCUTS</h2>
+<div class="space-y-1">
+<!-- Row 1 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] font-jetbrains text-[13px] font-medium text-suit-black uppercase">[U]</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Undo last move</div>
+</div>
+<!-- Row 2 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] font-jetbrains text-[13px] font-medium text-suit-black uppercase">[H]</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Show hint</div>
+</div>
+<!-- Row 3 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] font-jetbrains text-[13px] font-medium text-suit-black uppercase">[N]</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">New game</div>
+</div>
+<!-- Row 4 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] font-jetbrains text-[13px] font-medium text-suit-black uppercase">[A]</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Auto-complete (when possible)</div>
+</div>
+<!-- Row 5 -->
+<div class="h-[56px] bg-surface-container rounded-lg px-3 flex items-center border border-outline/10">
+<div class="w-[40%] font-jetbrains text-[13px] font-medium text-suit-black uppercase">[ESC]</div>
+<div class="w-[60%] font-jetbrains text-[12px] text-on-surface-variant leading-tight">Pause / back</div>
+</div>
+</div>
+</section>
+</main>
+<!-- 4. Footer -->
+<footer class="h-[24px] bg-surface-container border-t border-outline/20 flex items-center justify-between px-2 shrink-0">
+<div class="font-jetbrains text-[10px] text-suit-black">
+<span class="opacity-80">▌ NORMAL │ help</span>
+</div>
+<div class="font-jetbrains text-[10px] uppercase tracking-wider flex items-center gap-1">
+<span class="text-outline">PRESS</span>
+<span class="text-on-surface-variant">[ESC]</span>
+<span class="text-outline">OR TAP</span>
+<span class="text-on-surface-variant">×</span>
+<span class="text-outline">TO RETURN</span>
+</div>
+</footer>
+</div>
+</body></html>

docs/ui-mockups/home-menu-desktop.html

@@ -0,0 +1,343 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>RS_TERMINAL_OS - Rusty Solitaire</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+    .material-symbols-outlined {
+      font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+      font-size: 18px;
+    }
+    body {
+      background-color: #151515;
+      color: #d0d0d0;
+      font-family: 'JetBrains Mono', monospace;
+      overflow: hidden;
+    }
+    .scanline {
+      width: 100%;
+      height: 2px;
+      background: rgba(26, 26, 26, 0.5);
+      position: absolute;
+      pointer-events: none;
+    }
+    .custom-scrollbar::-webkit-scrollbar {
+      width: 4px;
+    }
+    .custom-scrollbar::-webkit-scrollbar-track {
+      background: #151515;
+    }
+    .custom-scrollbar::-webkit-scrollbar-thumb {
+      background: #353535;
+    }
+  </style>
+<script id="tailwind-config">
+    tailwind.config = {
+      darkMode: "class",
+      theme: {
+        extend: {
+          "colors": {
+                  "on-tertiary-container": "#683476",
+                  "surface-dim": "#101417",
+                  "primary-fixed": "#c4e7ff",
+                  "on-error": "#690005",
+                  "on-secondary-fixed": "#161e00",
+                  "on-tertiary": "#4c195b",
+                  "primary-fixed-dim": "#7ed0fe",
+                  "outline-variant": "#3f484e",
+                  "tertiary": "#f7c3ff",
+                  "surface": "#151515",
+                  "tertiary-container": "#e1a3ee",
+                  "highlight-celebration": "#e1a3ee",
+                  "background": "#101417",
+                  "surface-container": "#202020",
+                  "primary-container": "#6fc2ef",
+                  "on-secondary-fixed-variant": "#3c4d00",
+                  "on-surface": "#d0d0d0",
+                  "inverse-on-surface": "#2d3134",
+                  "on-error-container": "#ffdad6",
+                  "surface-container-low": "#181c1f",
+                  "on-tertiary-fixed": "#340043",
+                  "on-secondary-container": "#b2c86d",
+                  "on-background": "#e0e3e6",
+                  "secondary-container": "#435401",
+                  "error": "#fb9fb1",
+                  "info": "#12cfc0",
+                  "on-surface-variant": "#bfc8cf",
+                  "warning": "#ddb26f",
+                  "inverse-primary": "#00668a",
+                  "tertiary-fixed-dim": "#f0b0fc",
+                  "surface-tint": "#7ed0fe",
+                  "suit-black": "#d0d0d0",
+                  "tertiary-fixed": "#fbd7ff",
+                  "on-secondary": "#293500",
+                  "on-primary-fixed": "#001e2c",
+                  "surface-container-highest": "#313538",
+                  "error-container": "#93000a",
+                  "surface-container-high": "#272a2d",
+                  "on-primary-container": "#004f6c",
+                  "inverse-surface": "#e0e3e6",
+                  "on-primary": "#003549",
+                  "suit-red-cb": "#6fc2ef",
+                  "on-primary-fixed-variant": "#004c69",
+                  "on-tertiary-fixed-variant": "#653173",
+                  "secondary-fixed": "#d5ec8c",
+                  "highlight-valid": "#acc267",
+                  "surface-variant": "#313538",
+                  "secondary": "#bad073",
+                  "secondary-fixed-dim": "#bad073",
+                  "outline": "#505050",
+                  "surface-container-lowest": "#0b0f11",
+                  "primary": "#a1dcff",
+                  "surface-bright": "#363a3d",
+                  "suit-red": "#fb9fb1"
+          },
+          "borderRadius": {
+                  "DEFAULT": "0px",
+                  "lg": "0px",
+                  "xl": "0px",
+                  "full": "0px"
+          },
+          "spacing": {
+                  "stack-overlap": "2rem",
+                  "touch-target-min": "48px",
+                  "margin-edge": "1rem",
+                  "gutter-card": "0.375rem",
+                  "action-bar-height": "64px"
+          },
+          "fontFamily": {
+                  "card-rank": ["JetBrains Mono"],
+                  "headline": ["JetBrains Mono"],
+                  "hud-timer": ["JetBrains Mono"],
+                  "hud-score": ["JetBrains Mono"],
+                  "body-md": ["Inter"],
+                  "label-caps": ["JetBrains Mono"]
+          },
+          "fontSize": {
+                  "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                  "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                  "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                  "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                  "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                  "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}]
+          }
+        },
+      },
+    }
+  </script>
+</head>
+<body class="bg-surface text-on-surface h-screen flex flex-col antialiased">
+<!-- TOP BAR (32px) -->
+<header class="h-8 bg-surface-container border-b border-outline flex items-center justify-between px-4 z-50">
+<div class="flex items-center gap-2">
+<span class="text-primary-container font-bold">▌</span>
+<h1 class="font-headline text-[14px] font-bold tracking-tight text-on-surface">RS_TERMINAL_OS</h1>
+</div>
+<nav class="flex gap-4 font-label-caps text-[12px] uppercase tracking-widest">
+<span class="text-primary-container">[ HOME ]</span>
+<span class="text-on-surface-variant hover:text-primary transition-colors cursor-pointer">· PLAY</span>
+<span class="text-on-surface-variant hover:text-primary transition-colors cursor-pointer">· STATS</span>
+<span class="text-on-surface-variant hover:text-primary transition-colors cursor-pointer">· SETTINGS</span>
+</nav>
+<div class="flex items-center gap-3 font-label-caps text-[11px] text-on-surface-variant">
+<div class="flex items-center gap-1">
+<span>LV 12</span>
+<span class="text-outline">|</span>
+<div class="flex items-center gap-2">
+<span>XP 320/500</span>
+<div class="w-[60px] h-1 bg-surface-container-highest">
+<div class="h-full bg-primary-container w-[64%]"></div>
+</div>
+</div>
+</div>
+<span class="text-outline">|</span>
+<div class="flex items-center gap-1 text-info">
+<span class="w-2 h-2 rounded-full bg-info"></span>
+<span class="uppercase">Synced</span>
+</div>
+<span class="text-outline">|</span>
+<span class="text-outline">v0.20.0</span>
+</div>
+</header>
+<!-- MAIN CONTENT AREA -->
+<main class="flex-1 flex overflow-hidden">
+<!-- LEFT PANE (40%) -->
+<section class="w-[40%] border-r border-outline flex flex-col p-8 gap-8 overflow-y-auto custom-scrollbar">
+<div class="space-y-1">
+<p class="text-outline font-label-caps text-xs">▌play.tsx</p>
+<h2 class="font-headline text-[32px] font-bold text-on-surface leading-none uppercase">Ready to play?</h2>
+<p class="text-on-surface-variant font-label-caps text-sm tracking-wide">RESUME · 12:34 ELAPSED · DRAW-3</p>
+</div>
+<button class="w-full h-24 bg-primary-container text-surface font-headline text-[24px] font-bold flex items-center justify-center gap-4 hover:brightness-110 active:scale-[0.98] transition-all">
+<span class="material-symbols-outlined" style="font-variation-settings: 'FILL' 1;">play_arrow</span>
+        CONTINUE GAME
+      </button>
+<div class="grid grid-cols-2 gap-4">
+<button class="h-12 border border-outline bg-transparent text-on-surface font-label-caps text-sm hover:border-primary-container hover:text-primary-container transition-all flex items-center justify-center gap-2">
+<span class="material-symbols-outlined">add</span>
+          NEW GAME
+        </button>
+<button class="h-12 border border-outline bg-transparent text-on-surface font-label-caps text-sm hover:border-primary-container hover:text-primary-container transition-all flex items-center justify-center gap-2">
+<span class="material-symbols-outlined">refresh</span>
+          RESTART RUN
+        </button>
+</div>
+<div class="space-y-4">
+<p class="text-outline font-label-caps text-xs uppercase tracking-widest">Game Modes</p>
+<div class="grid grid-cols-3 gap-3">
+<!-- Zen -->
+<div class="aspect-square border border-outline flex flex-col items-center justify-center gap-2 hover:bg-surface-container transition-colors cursor-pointer group">
+<span class="material-symbols-outlined text-outline group-hover:text-primary-container">spa</span>
+<span class="font-label-caps text-[10px] uppercase">Zen</span>
+</div>
+<!-- Time Attack -->
+<div class="aspect-square border border-outline flex flex-col items-center justify-center gap-2 hover:bg-surface-container transition-colors cursor-pointer group">
+<span class="material-symbols-outlined text-outline group-hover:text-primary-container">timer</span>
+<span class="font-label-caps text-[10px] uppercase text-center">Time<br/>Attack</span>
+</div>
+<!-- Locked Challenge -->
+<div class="aspect-square bg-[#0d0d0d] border border-outline/30 flex flex-col items-center justify-center gap-2 relative opacity-60">
+<span class="material-symbols-outlined text-outline">lock</span>
+<span class="font-label-caps text-[10px] uppercase">Challenge</span>
+<div class="absolute -top-2 -right-2 bg-warning text-surface px-1 py-0.5 text-[8px] font-bold">LV 5</div>
+</div>
+</div>
+</div>
+<!-- VISUAL DECORATION (IMAGE PLACEHOLDER) -->
+<div class="mt-auto pt-8">
+<div class="w-full h-40 border border-outline overflow-hidden">
+<img class="w-full h-full object-cover opacity-40 grayscale hover:grayscale-0 transition-all duration-700" data-alt="A dark, high-contrast digital art piece showing an abstract terminal interface with glowing cyan scanlines and retro-futuristic grid patterns. The composition is geometric and minimalist, following a synthwave aesthetic with deep black backgrounds and crisp cyan light elements. The lighting is moody and artificial, suggesting a high-performance computer screen in a dimly lit server room. Professional, sharp-edged UI design style." src="https://lh3.googleusercontent.com/aida-public/AB6AXuAet8SrRWSacZfwd8ISRQdDC7CDGixBwRnPAVMmMcjbifq1jnHSzCGWgSSL6YPSRfCkLNWr91BxTzV4zigGjMBLlk7rCLo5I7X7F6ydinDrKJVqZkRbvHJeSo90BPANoQwZtzPvhKXVEA9C2DbBaj8KPR4ObCo24Mj25NXPvGNThOE-3BSpuU6MPC-hrUMPVCPJpZnJdI_OmSz8mT021vjTxFERN12S1PFOzXKmNUDleoTDIat-8UifyKmKg4eKilecrBW6sFqaBw"/>
+</div>
+</div>
+</section>
+<!-- CENTER PANE (30%) -->
+<section class="w-[30%] border-r border-outline flex flex-col p-8 gap-8 overflow-y-auto custom-scrollbar">
+<div class="space-y-1">
+<p class="text-outline font-label-caps text-xs">▌daily.json</p>
+<div class="flex items-center justify-between">
+<h3 class="font-headline text-[18px] font-bold text-on-surface">MAY 07 · 2026</h3>
+<span class="bg-warning/20 text-warning px-2 py-1 text-[10px] font-bold border border-warning/40">EXPIRES 11:42:30</span>
+</div>
+</div>
+<div class="bg-surface-container p-6 border border-outline space-y-4">
+<div class="space-y-1">
+<p class="text-on-surface-variant font-label-caps text-[10px] uppercase tracking-tighter">Current Seed</p>
+<p class="font-headline text-[24px] font-extrabold text-highlight-valid">#2024-127</p>
+</div>
+<button class="w-full py-3 bg-primary-container text-surface font-label-caps text-xs font-bold uppercase tracking-widest hover:brightness-110 active:scale-95 transition-all">
+          ▶ Attempt Today
+        </button>
+</div>
+<div class="space-y-3">
+<p class="text-outline font-label-caps text-xs uppercase tracking-widest">Global Standings</p>
+<div class="space-y-1 text-xs font-label-caps">
+<div class="flex justify-between py-2 border-b border-outline/30 text-highlight-valid">
+<span>01 │ swift_jaguar</span>
+<span>02:47</span>
+</div>
+<div class="flex justify-between py-2 border-b border-outline/30 text-on-surface-variant">
+<span>02 │ pixel_drifter</span>
+<span>03:12</span>
+</div>
+<div class="flex justify-between py-2 border-b border-outline/30 text-on-surface-variant">
+<span>03 │ null_ptr</span>
+<span>03:15</span>
+</div>
+<div class="flex justify-between py-2 border-b border-outline/30 text-on-surface-variant">
+<span>04 │ core_dump_88</span>
+<span>03:44</span>
+</div>
+<div class="flex justify-between py-2 text-primary-container bg-primary-container/10 px-2 -mx-2">
+<span>12 │ YOU (anon)</span>
+<span>--:--</span>
+</div>
+</div>
+</div>
+</section>
+<!-- RIGHT PANE (30%) -->
+<section class="w-[30%] flex flex-col p-8 gap-8 overflow-y-auto custom-scrollbar">
+<div class="space-y-1">
+<p class="text-outline font-label-caps text-xs">▌stats.log</p>
+</div>
+<div class="grid grid-cols-2 gap-4">
+<div class="border border-outline p-4 space-y-1">
+<p class="text-on-surface-variant text-[10px] uppercase">Games</p>
+<p class="font-hud-score text-[28px] text-on-surface">247</p>
+</div>
+<div class="border border-outline p-4 space-y-1 text-highlight-valid">
+<p class="text-on-surface-variant text-[10px] uppercase">Win Rate</p>
+<p class="font-hud-score text-[28px]">61%</p>
+</div>
+<div class="border border-outline p-4 space-y-1">
+<p class="text-on-surface-variant text-[10px] uppercase">Best Time</p>
+<p class="font-hud-score text-[28px]">01:54</p>
+</div>
+<div class="border border-outline p-4 space-y-1 text-primary-container">
+<p class="text-on-surface-variant text-[10px] uppercase">Streak</p>
+<p class="font-hud-score text-[28px]">7</p>
+</div>
+</div>
+<div class="space-y-3">
+<p class="text-outline font-label-caps text-xs uppercase tracking-widest">Achievements (8/19)</p>
+<div class="flex flex-wrap gap-2">
+<!-- Filled Cyan Dots -->
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<div class="w-3 h-3 bg-primary-container"></div>
+<!-- Empty Dots -->
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+<div class="w-3 h-3 border border-outline"></div>
+</div>
+</div>
+<div class="mt-auto border border-outline bg-surface-container p-4 flex items-center justify-between hover:border-primary-container transition-colors cursor-pointer group">
+<div class="flex items-center gap-3">
+<div class="w-10 h-10 bg-primary-container text-surface flex items-center justify-center font-bold text-lg">RS</div>
+<div class="space-y-0.5">
+<p class="text-on-surface font-bold text-xs">anonymous@local</p>
+<p class="text-on-surface-variant text-[10px]">Session: Active</p>
+</div>
+</div>
+<span class="material-symbols-outlined text-primary-container group-hover:translate-x-1 transition-transform">arrow_forward</span>
+</div>
+</section>
+</main>
+<!-- BOTTOM BAR (24px) -->
+<footer class="h-6 bg-surface-container border-t border-outline flex items-center justify-between px-4 text-[10px] font-label-caps">
+<div class="flex items-center gap-2">
+<span class="text-primary-container">▌ NORMAL</span>
+<span class="text-outline">│</span>
+<span class="text-on-surface-variant">~/rusty-solitaire/home</span>
+</div>
+<div class="flex items-center gap-4 text-on-surface-variant">
+<div class="flex items-center gap-1"><span class="text-primary-container">[SPACE]</span> play</div>
+<div class="flex items-center gap-1"><span class="text-primary-container">[D]</span> daily</div>
+<div class="flex items-center gap-1"><span class="text-primary-container">[S]</span> settings</div>
+<div class="flex items-center gap-1"><span class="text-primary-container">[?]</span> help</div>
+</div>
+<div class="text-outline">
+      2026-05-07 17:42 EDT
+    </div>
+</footer>
+<!-- GLOBAL SCANLINE EFFECT -->
+<div class="fixed inset-0 pointer-events-none z-[100] overflow-hidden opacity-10">
+<div class="absolute inset-0" style="background: repeating-linear-gradient(0deg, #151515, #151515 2px, #202020 4px);"></div>
+</div>
+</body></html>

docs/ui-mockups/home-menu-mobile.html

@@ -0,0 +1,225 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Main Menu</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "outline": "#505050",
+                        "suit-red-cb": "#6fc2ef",
+                        "suit-black": "#d0d0d0",
+                        "surface-container-high": "#272a2d",
+                        "primary-fixed": "#c4e7ff",
+                        "on-secondary-container": "#b2c86d",
+                        "secondary-fixed": "#d5ec8c",
+                        "on-tertiary-container": "#683476",
+                        "surface-tint": "#7ed0fe",
+                        "background": "#101417",
+                        "primary-container": "#6fc2ef",
+                        "inverse-surface": "#e0e3e6",
+                        "highlight-celebration": "#e1a3ee",
+                        "surface-container-low": "#181c1f",
+                        "on-surface": "#d0d0d0",
+                        "primary": "#a1dcff",
+                        "on-tertiary-fixed": "#340043",
+                        "secondary-container": "#435401",
+                        "inverse-primary": "#00668a",
+                        "tertiary-fixed": "#fbd7ff",
+                        "surface-bright": "#363a3d",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "warning": "#ddb26f",
+                        "tertiary-container": "#e1a3ee",
+                        "suit-red": "#fb9fb1",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "info": "#12cfc0",
+                        "on-primary-fixed": "#001e2c",
+                        "surface-container-lowest": "#0b0f11",
+                        "error": "#fb9fb1",
+                        "surface-variant": "#313538",
+                        "on-error": "#690005",
+                        "surface": "#151515",
+                        "surface-container": "#202020",
+                        "on-primary-container": "#004f6c",
+                        "inverse-on-surface": "#2d3134",
+                        "on-primary-fixed-variant": "#004c69",
+                        "on-secondary": "#293500",
+                        "error-container": "#93000a",
+                        "secondary": "#bad073",
+                        "tertiary": "#f7c3ff",
+                        "outline-variant": "#3f484e",
+                        "on-secondary-fixed": "#161e00",
+                        "secondary-fixed-dim": "#bad073",
+                        "surface-container-highest": "#313538",
+                        "on-surface-variant": "#bfc8cf",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "on-error-container": "#ffdad6",
+                        "on-primary": "#003549",
+                        "on-background": "#e0e3e6",
+                        "surface-dim": "#101417",
+                        "on-tertiary": "#4c195b",
+                        "highlight-valid": "#acc267"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "margin-edge": "1rem",
+                        "touch-target-min": "48px",
+                        "stack-overlap": "2rem",
+                        "action-bar-height": "64px",
+                        "gutter-card": "0.375rem"
+                    },
+                    "fontFamily": {
+                        "hud-timer": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "card-rank": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "hud-timer": ["16px", { "lineHeight": "24px", "fontWeight": "400" }],
+                        "headline": ["28px", { "lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700" }],
+                        "label-caps": ["12px", { "lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500" }],
+                        "hud-score": ["24px", { "lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700" }],
+                        "body-md": ["16px", { "lineHeight": "24px", "fontWeight": "400" }],
+                        "card-rank": ["18px", { "lineHeight": "18px", "fontWeight": "700" }]
+                    }
+                }
+            }
+        }
+    </script>
+<style>
+        .scanline {
+            background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,0) 50%, rgba(0,0,0,0.1) 50%, rgba(0,0,0,0.1));
+            background-size: 100% 4px;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface text-on-surface font-hud-timer min-h-screen flex flex-col relative overflow-hidden">
+<!-- Subtle CRT scanline overlay -->
+<div class="absolute inset-0 pointer-events-none scanline opacity-20 z-0"></div>
+<!-- Status Bar Zone -->
+<div class="h-6 w-full flex justify-end items-center px-margin-edge pt-2 z-10 relative">
+<div class="w-2 h-2 rounded-full bg-info"></div>
+</div>
+<!-- Header -->
+<header class="px-margin-edge pt-4 pb-6 flex justify-between items-center z-10 relative">
+<div class="flex items-center gap-1">
+<span class="font-headline text-headline text-on-surface">▌RUSTY SOLITAIRE</span>
+<div class="w-2 h-6 bg-primary-container inline-block ml-1 animate-pulse"></div>
+</div>
+<div class="bg-surface-container px-3 py-1 flex items-center gap-2 border border-outline">
+<span class="font-label-caps text-label-caps text-on-surface">LV 12</span>
+<div class="w-2 h-2 rounded-full bg-highlight-celebration"></div>
+</div>
+</header>
+<!-- Main Content Canvas -->
+<main class="flex-1 px-margin-edge flex flex-col gap-8 z-10 relative pb-24 overflow-y-auto">
+<!-- XP Section -->
+<section class="flex flex-col gap-2">
+<div class="w-full h-1 bg-surface-container border border-outline relative">
+<div class="absolute top-0 left-0 h-full bg-primary-container w-[64%]"></div>
+</div>
+<div class="font-label-caps text-label-caps text-on-surface-variant text-right">
+                320 / 500 XP
+            </div>
+</section>
+<!-- Primary Action -->
+<section class="flex flex-col gap-2">
+<button class="w-full h-[56px] bg-primary-container text-surface flex items-center justify-center gap-2 hover:bg-surface-tint transition-colors duration-120">
+<span class="material-symbols-outlined" style="font-variation-settings: 'FILL' 1;">play_arrow</span>
+<span class="font-label-caps text-[14px] uppercase tracking-widest font-bold">PLAY</span>
+</button>
+<div class="font-label-caps text-label-caps text-on-surface-variant text-center">
+                RESUME LAST GAME · 12:34 ELAPSED
+            </div>
+</section>
+<!-- Daily Challenge Tile -->
+<section>
+<div class="bg-surface-container border border-outline p-4 flex justify-between items-center hover:bg-surface-container-high transition-colors cursor-pointer group">
+<div class="flex flex-col gap-2">
+<span class="font-label-caps text-label-caps text-primary">DAILY CHALLENGE</span>
+<span class="font-body-md text-body-md text-on-surface">DRAW-3 · SEED #2024-127</span>
+<div class="inline-flex">
+<span class="bg-surface px-2 py-0.5 border border-warning text-warning font-label-caps text-[10px]">EXPIRES 11:42:30</span>
+</div>
+</div>
+<span class="material-symbols-outlined text-primary group-hover:translate-x-1 transition-transform">chevron_right</span>
+</div>
+</section>
+<!-- Special Modes Grid -->
+<section class="flex flex-col gap-4">
+<h2 class="font-label-caps text-label-caps text-on-surface-variant">SPECIAL MODES</h2>
+<div class="grid grid-cols-3 gap-gutter-card">
+<!-- ZEN -->
+<button class="aspect-square bg-surface border border-outline flex flex-col items-center justify-center gap-2 hover:border-primary hover:text-primary transition-colors text-on-surface">
+<span class="material-symbols-outlined text-[32px]">self_improvement</span>
+<span class="font-label-caps text-label-caps">ZEN</span>
+</button>
+<!-- TIME ATTACK -->
+<button class="aspect-square bg-surface border border-outline flex flex-col items-center justify-center gap-2 hover:border-primary hover:text-primary transition-colors text-on-surface">
+<span class="material-symbols-outlined text-[32px]">timer</span>
+<span class="font-label-caps text-label-caps">TIME ATTACK</span>
+</button>
+<!-- CHALLENGE (Locked) -->
+<button class="aspect-square bg-[#0d0d0d] border border-surface-container-high flex flex-col items-center justify-center gap-2 text-on-surface-variant opacity-75 cursor-not-allowed relative">
+<span class="material-symbols-outlined text-[32px]">lock</span>
+<span class="font-label-caps text-label-caps">CHALLENGE</span>
+<div class="absolute top-2 right-2 bg-surface px-1 py-0.5 border border-warning text-warning font-label-caps text-[10px]">
+                        LV 5
+                    </div>
+</button>
+</div>
+</section>
+<!-- Secondary Nav Grid -->
+<section class="grid grid-cols-2 gap-y-4 gap-x-6 pb-6">
+<button class="flex items-center gap-3 h-[56px] border-l-2 border-outline pl-3 hover:border-primary hover:text-primary transition-colors text-on-surface justify-start">
+<span class="material-symbols-outlined">bar_chart</span>
+<span class="font-label-caps text-label-caps">STATS</span>
+</button>
+<button class="flex items-center gap-3 h-[56px] border-l-2 border-outline pl-3 hover:border-primary hover:text-primary transition-colors text-on-surface justify-start relative">
+<span class="material-symbols-outlined">emoji_events</span>
+<span class="font-label-caps text-label-caps">ACHIEVEMENTS</span>
+<div class="absolute right-2 top-1/2 -translate-y-1/2 w-2 h-2 rounded-full bg-highlight-celebration"></div>
+</button>
+<button class="flex items-center gap-3 h-[56px] border-l-2 border-outline pl-3 hover:border-primary hover:text-primary transition-colors text-on-surface justify-start">
+<span class="material-symbols-outlined">format_list_numbered</span>
+<span class="font-label-caps text-label-caps">LEADERBOARD</span>
+</button>
+<button class="flex items-center gap-3 h-[56px] border-l-2 border-outline pl-3 hover:border-primary hover:text-primary transition-colors text-on-surface justify-start">
+<span class="material-symbols-outlined">account_circle</span>
+<span class="font-label-caps text-label-caps">PROFILE</span>
+</button>
+</section>
+<!-- Footer Links -->
+<footer class="flex flex-col items-center gap-4 mt-auto">
+<div class="flex items-center gap-4 font-label-caps text-label-caps text-primary cursor-pointer hover:text-surface-tint">
+<span>SETTINGS</span>
+<span class="text-on-surface-variant">·</span>
+<span>HELP</span>
+</div>
+<div class="font-label-caps text-[10px] text-on-surface-variant text-center opacity-60">
+                v0.20.0 — TERMINAL THEME · BUILD 2026.05
+            </div>
+</footer>
+</main>
+</body></html>

docs/ui-mockups/leaderboard-mobile.html

@@ -0,0 +1,315 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Leaderboard</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+        body {
+            background-color: #151515;
+            color: #e0e3e6;
+            -webkit-font-smoothing: antialiased;
+            -moz-osx-font-smoothing: grayscale;
+        }
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+            vertical-align: middle;
+        }
+        .scanline-overlay {
+            background: linear-gradient(to bottom, rgba(21, 21, 21, 0) 50%, rgba(26, 26, 26, 0.2) 50%);
+            background-size: 100% 4px;
+            pointer-events: none;
+        }
+        .terminal-glow {
+            box-shadow: 0 0 10px rgba(111, 194, 239, 0.1);
+        }
+    </style>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "outline": "#505050",
+                        "on-surface-variant": "#bfc8cf",
+                        "secondary-container": "#435401",
+                        "surface-container-lowest": "#0b0f11",
+                        "primary": "#a1dcff",
+                        "secondary-fixed": "#d5ec8c",
+                        "on-secondary-fixed": "#161e00",
+                        "on-error": "#690005",
+                        "inverse-primary": "#00668a",
+                        "surface-container": "#202020",
+                        "highlight-valid": "#acc267",
+                        "suit-black": "#d0d0d0",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-primary-fixed": "#001e2c",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "primary-fixed": "#c4e7ff",
+                        "inverse-on-surface": "#2d3134",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-secondary": "#293500",
+                        "on-surface": "#e0e3e6",
+                        "on-tertiary-container": "#683476",
+                        "secondary": "#bad073",
+                        "surface-bright": "#363a3d",
+                        "tertiary-container": "#e1a3ee",
+                        "surface-variant": "#313538",
+                        "suit-red": "#fb9fb1",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "surface-container-low": "#181c1f",
+                        "surface": "#151515",
+                        "suit-red-cb": "#6fc2ef",
+                        "on-primary": "#003549",
+                        "primary-container": "#6fc2ef",
+                        "on-background": "#e0e3e6",
+                        "tertiary": "#f7c3ff",
+                        "surface-container-highest": "#313538",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "tertiary-fixed": "#fbd7ff",
+                        "info": "#12cfc0",
+                        "error": "#fb9fb1",
+                        "warning": "#ddb26f",
+                        "on-primary-container": "#004f6c",
+                        "surface-container-high": "#272a2d",
+                        "inverse-surface": "#e0e3e6",
+                        "error-container": "#93000a",
+                        "on-tertiary-fixed": "#340043",
+                        "surface-tint": "#7ed0fe",
+                        "on-tertiary": "#4c195b",
+                        "background": "#101417",
+                        "on-error-container": "#ffdad6",
+                        "on-secondary-container": "#b2c86d",
+                        "outline-variant": "#3f484e",
+                        "highlight-celebration": "#e1a3ee",
+                        "surface-dim": "#101417",
+                        "on-primary-fixed-variant": "#004c69"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "touch-target-min": "48px",
+                        "action-bar-height": "64px",
+                        "stack-overlap": "2rem",
+                        "gutter-card": "0.375rem",
+                        "margin-edge": "1rem"
+                    },
+                    "fontFamily": {
+                        "card-rank": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "headline": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="font-body-md overflow-hidden h-[844px] w-[390px] mx-auto relative border-x border-outline/20">
+<div class="scanline-overlay absolute inset-0 z-0"></div>
+<!-- Top AppBar (Identity Anchor) -->
+<header class="fixed top-0 w-full h-action-bar-height z-50 flex items-center px-margin-edge justify-between bg-surface dark:bg-surface text-primary dark:text-primary border-b border-outline dark:border-outline">
+<div class="flex items-center gap-2">
+<span class="material-symbols-outlined text-primary">terminal</span>
+<h1 class="font-headline text-headline text-primary dark:text-primary uppercase tracking-tighter">Rusty Solitaire</h1>
+</div>
+<div class="flex items-center gap-4">
+<span class="material-symbols-outlined text-on-surface-variant hover:bg-surface-variant transition-colors duration-120 p-2 rounded-lg cursor-pointer">sync</span>
+</div>
+</header>
+<main class="pt-[64px] h-[calc(100%-64px)] flex flex-col z-10 relative">
+<!-- Pseudo Status Bar -->
+<div class="h-[32px] bg-surface-container flex items-center justify-between px-4 font-label-caps text-[10px] tracking-tight">
+<div class="text-[#a0a0a0]">▌leaderboard.tsx</div>
+<div class="flex items-center gap-2">
+<span class="flex items-center gap-1">
+<span class="w-1.5 h-1.5 rounded-full bg-info"></span>
+<span class="text-on-surface-variant">SYNCED</span>
+</span>
+<span class="text-outline">v0.20.0</span>
+</div>
+</div>
+<!-- Tab Strip -->
+<nav class="h-[40px] bg-[#1a1a1a] border-b border-[#353535] flex items-center">
+<div class="flex-1 flex flex-col items-center justify-center relative">
+<span class="font-label-caps text-[11px] text-[#6fc2ef]">[ TODAY ]</span>
+<div class="absolute bottom-0 w-full h-[2px] bg-[#6fc2ef]"></div>
+</div>
+<div class="flex-1 flex items-center justify-center">
+<span class="font-label-caps text-[11px] text-[#a0a0a0]">WEEK</span>
+</div>
+<div class="flex-1 flex items-center justify-center">
+<span class="font-label-caps text-[11px] text-[#a0a0a0]">ALL-TIME</span>
+</div>
+<div class="flex-1 flex items-center justify-center">
+<span class="font-label-caps text-[11px] text-[#a0a0a0]">FRIENDS</span>
+</div>
+</nav>
+<div class="flex-1 overflow-y-auto px-margin-edge pt-4 space-y-4 pb-[88px]">
+<!-- Hero Podium Card -->
+<section class="h-[120px] bg-surface-container border border-[#353535] rounded-lg p-2 flex flex-col justify-between">
+<div class="font-label-caps text-[10px] text-[#a0a0a0]">TOP 3 · TODAY</div>
+<div class="flex gap-2 items-end justify-between flex-1 mt-1">
+<!-- 2nd -->
+<div class="flex-1 border border-[#a0a0a0] h-full rounded flex flex-col items-center justify-center relative py-1">
+<span class="font-card-rank text-[16px] text-[#a0a0a0]">02</span>
+<span class="text-[9px] font-mono text-[#d0d0d0] truncate w-full text-center px-1">base16_fan</span>
+<span class="text-[10px] font-mono text-[#a0a0a0]">03:12</span>
+</div>
+<!-- 1st -->
+<div class="flex-[1.2] border border-warning h-[110%] mb-[-2px] rounded-lg bg-surface flex flex-col items-center justify-center relative py-1 terminal-glow">
+<span class="absolute top-1 right-1 text-warning material-symbols-outlined text-[14px]">star</span>
+<span class="font-card-rank text-[24px] text-warning leading-none">01</span>
+<span class="text-[11px] font-mono text-[#d0d0d0] font-bold truncate w-full text-center px-1">swift_jaguar</span>
+<span class="text-[12px] font-mono text-[#d0d0d0]">02:47</span>
+</div>
+<!-- 3rd -->
+<div class="flex-1 border border-[#7a5d3b] h-full rounded flex flex-col items-center justify-center relative py-1">
+<span class="font-card-rank text-[16px] text-[#7a5d3b]">03</span>
+<span class="text-[9px] font-mono text-[#d0d0d0] truncate w-full text-center px-1">cli_player</span>
+<span class="text-[10px] font-mono text-[#a0a0a0]">03:54</span>
+</div>
+</div>
+</section>
+<!-- Search/Filter Row -->
+<div class="flex items-center gap-2 h-[40px]">
+<div class="px-3 h-8 border border-outline rounded flex items-center justify-center bg-surface-container-low">
+<span class="font-label-caps text-[10px] text-[#6fc2ef]">[ ALL TIMES ]</span>
+</div>
+<div class="flex-1 h-8 border border-outline rounded flex items-center px-2 bg-surface gap-2">
+<span class="font-mono text-[12px] text-outline">/ search players</span>
+</div>
+</div>
+<!-- Leaderboard List -->
+<div class="space-y-0.5 font-mono text-[12px]">
+<!-- Header -->
+<div class="flex justify-between px-2 pb-1 border-b border-outline/20 text-outline text-[10px] uppercase font-bold tracking-widest">
+<span>Rank &amp; User</span>
+<span>Time</span>
+</div>
+<!-- Rank 04 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">004</span>
+<span class="text-on-surface">tablejockey</span>
+</div>
+<span class="text-[#a0a0a0]">04:01</span>
+</div>
+<!-- Rank 05 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">005</span>
+<span class="text-on-surface">vim_motions</span>
+</div>
+<span class="text-[#a0a0a0]">04:05</span>
+</div>
+<!-- Rank 06 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">006</span>
+<span class="text-on-surface">tmux_lover</span>
+</div>
+<span class="text-[#a0a0a0]">04:18</span>
+</div>
+<!-- Rank 07 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">007</span>
+<span class="text-on-surface">nvim_dotfiles</span>
+</div>
+<span class="text-[#a0a0a0]">04:23</span>
+</div>
+<!-- Rank 08 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">008</span>
+<span class="text-on-surface">dark_theme</span>
+</div>
+<span class="text-[#a0a0a0]">04:31</span>
+</div>
+<!-- Spacer for truncated view -->
+<div class="flex justify-center py-2 text-outline/30 tracking-[1em]">...</div>
+<!-- YOU (Rank 17) -->
+<div class="flex items-center justify-between px-2 py-2 bg-[#1f3a4a]/30 border border-[#6fc2ef]/40 rounded-sm">
+<div class="flex gap-4">
+<span class="text-[#6fc2ef] w-8 font-bold">▶ 017</span>
+<span class="text-[#6fc2ef] font-bold">anonymous (YOU)</span>
+</div>
+<span class="text-[#6fc2ef] font-bold">04:12</span>
+</div>
+<!-- Rank 18 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">018</span>
+<span class="text-on-surface">bash_brawler</span>
+</div>
+<span class="text-[#a0a0a0]">05:01</span>
+</div>
+<!-- Rank 19 -->
+<div class="flex items-center justify-between px-2 py-2 border-b border-[#353535]">
+<div class="flex gap-4">
+<span class="text-[#a0a0a0] w-8">019</span>
+<span class="text-on-surface">curl_master</span>
+</div>
+<span class="text-[#a0a0a0]">05:14</span>
+</div>
+</div>
+</div>
+<!-- CLI Style Footer -->
+<footer class="fixed bottom-0 w-full h-[24px] bg-[#202020] border-t border-[#353535] px-2 flex items-center justify-between font-mono text-[9px] z-50">
+<div class="text-[#a0a0a0]">
+<span class="text-info font-bold">▌</span> NORMAL │ leaderboard
+            </div>
+<div class="text-[#a0a0a0] flex gap-3">
+<span>[1-4] tab</span>
+<span>[/] search</span>
+<span>[ESC] back</span>
+</div>
+</footer>
+<!-- Shared Component: BottomNavBar -->
+<nav class="fixed bottom-[24px] w-full h-action-bar-height z-50 flex justify-around items-center bg-surface-container dark:bg-surface-container border-t border-outline dark:border-outline">
+<button class="flex flex-col items-center justify-center text-on-surface-variant dark:text-on-surface-variant p-2 hover:text-primary dark:hover:text-primary transition-all duration-120 ease-linear active:bg-surface-container-highest">
+<span class="material-symbols-outlined">playing_cards</span>
+<span class="font-label-caps text-label-caps">DEAL [F1]</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant dark:text-on-surface-variant p-2 hover:text-primary dark:hover:text-primary transition-all duration-120 ease-linear active:bg-surface-container-highest">
+<span class="material-symbols-outlined">undo</span>
+<span class="font-label-caps text-label-caps">UNDO [Z]</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant dark:text-on-surface-variant p-2 hover:text-primary dark:hover:text-primary transition-all duration-120 ease-linear active:bg-surface-container-highest">
+<span class="material-symbols-outlined">lightbulb</span>
+<span class="font-label-caps text-label-caps">HINT [H]</span>
+</button>
+<button class="flex flex-col items-center justify-center bg-primary-container dark:bg-primary-container text-on-primary-container dark:text-on-primary-container rounded-none p-2 transition-all duration-120 ease-linear active:bg-surface-container-highest">
+<span class="material-symbols-outlined">analytics</span>
+<span class="font-label-caps text-label-caps">STATS [S]</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant dark:text-on-surface-variant p-2 hover:text-primary dark:hover:text-primary transition-all duration-120 ease-linear active:bg-surface-container-highest">
+<span class="material-symbols-outlined">menu</span>
+<span class="font-label-caps text-label-caps">MENU [ESC]</span>
+</button>
+</nav>
+</main>
+</body></html>

docs/ui-mockups/level-up-mobile.html

@@ -0,0 +1,259 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>ROOT@SOLITAIRE:~ | LEVEL UP</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .scanline-overlay {
+            background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
+            background-size: 100% 2px, 3px 100%;
+            pointer-events: none;
+        }
+        .card-glow {
+            box-shadow: 0 0 24px rgba(225, 163, 238, 0.25);
+        }
+    </style>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "tertiary-fixed": "#fbd7ff",
+                        "secondary-container": "#435401",
+                        "on-tertiary-fixed": "#340043",
+                        "inverse-surface": "#e0e3e6",
+                        "tertiary-container": "#e1a3ee",
+                        "background": "#101417",
+                        "on-primary": "#003549",
+                        "info": "#12cfc0",
+                        "surface-container-highest": "#313538",
+                        "secondary-fixed": "#d5ec8c",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-surface-variant": "#bfc8cf",
+                        "on-secondary": "#293500",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "surface-container-low": "#181c1f",
+                        "surface-container-high": "#272a2d",
+                        "secondary": "#bad073",
+                        "outline-variant": "#3f484e",
+                        "on-surface": "#e0e3e6",
+                        "surface-tint": "#7ed0fe",
+                        "on-tertiary": "#4c195b",
+                        "on-secondary-fixed": "#161e00",
+                        "primary-fixed": "#c4e7ff",
+                        "on-tertiary-container": "#683476",
+                        "on-secondary-container": "#b2c86d",
+                        "surface-container-lowest": "#0b0f11",
+                        "inverse-primary": "#00668a",
+                        "primary-container": "#6fc2ef",
+                        "surface-container": "#1c2023",
+                        "on-background": "#e0e3e6",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-dim": "#101417",
+                        "on-primary-fixed-variant": "#004c69",
+                        "tertiary": "#f7c3ff",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "highlight-celebration": "#e1a3ee",
+                        "on-primary-fixed": "#001e2c",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "inverse-on-surface": "#2d3134",
+                        "error": "#fb9fb1",
+                        "error-container": "#93000a",
+                        "surface-bright": "#363a3d",
+                        "on-primary-container": "#004f6c",
+                        "warning": "#ddb26f",
+                        "surface": "#151515",
+                        "suit-black": "#d0d0d0",
+                        "highlight-valid": "#acc267",
+                        "outline": "#505050",
+                        "surface-variant": "#313538",
+                        "on-error-container": "#ffdad6",
+                        "on-error": "#690005",
+                        "primary": "#a1dcff",
+                        "suit-red": "#fb9fb1"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "gutter-card": "0.375rem",
+                        "action-bar-height": "64px",
+                        "stack-overlap": "2rem",
+                        "margin-edge": "1rem"
+                    },
+                    "fontFamily": {
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "headline": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-background font-body-md overflow-hidden h-screen select-none">
+<!-- Top App Bar -->
+<header class="fixed top-0 w-full z-50 flex justify-between items-center px-margin-edge h-action-bar-height bg-background dark:bg-background border-b border-outline-variant dark:border-outline-variant">
+<div class="font-headline text-headline text-primary dark:text-primary uppercase tracking-tighter">ROOT@SOLITAIRE:~</div>
+<div class="flex gap-4">
+<span class="material-symbols-outlined text-primary" data-icon="memory">memory</span>
+<span class="material-symbols-outlined text-primary" data-icon="settings_ethernet">settings_ethernet</span>
+<span class="material-symbols-outlined text-primary" data-icon="wifi_tethering">wifi_tethering</span>
+</div>
+</header>
+<!-- Main Tableau (Dimmed Background) -->
+<main class="pt-24 px-4 flex flex-col gap-8 opacity-20 filter grayscale">
+<!-- HUD Chips -->
+<div class="flex justify-between items-center">
+<div class="bg-surface-container p-3 flex flex-col">
+<span class="font-label-caps text-label-caps text-on-surface-variant uppercase">SCORE</span>
+<span class="font-hud-score text-hud-score text-primary">04,820</span>
+</div>
+<div class="bg-surface-container p-3 flex flex-col items-end">
+<span class="font-label-caps text-label-caps text-on-surface-variant uppercase">TIMER</span>
+<span class="font-hud-timer text-hud-timer text-on-surface">04:12</span>
+</div>
+</div>
+<!-- Foundation & Stock -->
+<div class="flex gap-gutter-card justify-between">
+<div class="flex gap-gutter-card">
+<div class="w-[64px] h-[88px] border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="w-[64px] h-[88px] bg-surface border border-outline rounded-DEFAULT relative overflow-hidden">
+<div class="absolute inset-0 scanline-overlay"></div>
+<div class="absolute top-2 left-2 w-3 h-4 bg-suit-red-cb"></div>
+<div class="absolute bottom-2 right-2 font-card-rank text-[12px] text-on-surface">▌RS</div>
+</div>
+</div>
+<div class="flex gap-gutter-card">
+<div class="w-[64px] h-[88px] border border-outline rounded-DEFAULT bg-surface"></div>
+<div class="w-[64px] h-[88px] border border-outline rounded-DEFAULT bg-surface"></div>
+<div class="w-[64px] h-[88px] border border-outline rounded-DEFAULT bg-surface"></div>
+<div class="w-[64px] h-[88px] border border-outline rounded-DEFAULT bg-surface"></div>
+</div>
+</div>
+<!-- Cascades -->
+<div class="grid grid-cols-7 gap-gutter-card">
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+<div class="h-24 border border-dashed border-outline rounded-DEFAULT"></div>
+</div>
+</main>
+<!-- CELEBRATION OVERLAY SCREEM -->
+<div class="fixed inset-0 z-[100] flex items-center justify-center bg-surface/95 backdrop-blur-sm">
+<!-- Celebration Card -->
+<div class="w-[340px] h-[480px] bg-[#202020] border border-highlight-celebration rounded-xl card-glow flex flex-col overflow-hidden relative">
+<!-- Title Bar -->
+<div class="h-[28px] bg-[#1a1a1a] border-b border-outline flex items-center px-4 shrink-0">
+<span class="text-primary mr-1">▌</span>
+<span class="font-headline text-[12px] text-[#a0a0a0]">level-up.tsx</span>
+</div>
+<!-- Content Area -->
+<div class="flex-grow p-6 flex flex-col">
+<!-- Hero Band -->
+<div class="text-center mb-6">
+<div class="font-headline text-[14px] text-highlight-celebration uppercase tracking-[0.08em] mb-2">▲ LEVEL UP</div>
+<div class="flex items-baseline justify-center gap-2">
+<span class="font-headline font-bold text-[96px] text-suit-black leading-none tracking-tighter">13</span>
+<div class="flex flex-col items-start">
+<span class="font-label-caps text-[11px] text-outline uppercase">FROM 12</span>
+</div>
+</div>
+<div class="mt-2 font-headline font-medium text-[13px] text-highlight-celebration tracking-[0.08em]">█ NEW PERKS UNLOCKED</div>
+</div>
+<!-- Perks List -->
+<div class="space-y-2 mb-6">
+<!-- Item 1 -->
+<div class="h-[48px] bg-[#1a1a1a] rounded-[4px] px-3 flex items-center justify-between">
+<span class="font-headline text-[13px] text-suit-black">▢ +1 daily challenge slot</span>
+<span class="bg-highlight-celebration/10 text-highlight-celebration px-2 py-0.5 rounded-full font-label-caps text-[10px] border border-highlight-celebration/30">NEW</span>
+</div>
+<!-- Item 2 -->
+<div class="h-[48px] bg-[#1a1a1a] rounded-[4px] px-3 flex items-center justify-between">
+<span class="font-headline text-[13px] text-suit-black">▢ Background: Forest</span>
+<span class="bg-highlight-valid/10 text-highlight-valid px-2 py-0.5 rounded-full font-label-caps text-[10px] border border-highlight-valid/30">UNLOCKED</span>
+</div>
+<!-- Item 3 -->
+<div class="h-[48px] bg-[#1a1a1a] rounded-[4px] px-3 flex items-center justify-between">
+<span class="font-headline text-[13px] text-suit-black">▢ Card-back: Stripes</span>
+<span class="bg-highlight-valid/10 text-highlight-valid px-2 py-0.5 rounded-full font-label-caps text-[10px] border border-highlight-valid/30">UNLOCKED</span>
+</div>
+</div>
+<!-- XP Recap -->
+<div class="h-[48px] bg-[#1a1a1a] rounded-[4px] px-4 flex items-center justify-between mt-auto">
+<span class="font-headline text-[12px] text-[#a0a0a0]">XP</span>
+<span class="font-headline font-bold text-[14px] text-highlight-valid uppercase">+200 XP THIS LEVEL</span>
+<div class="w-[60px] h-[4px] bg-outline-variant rounded-full overflow-hidden">
+<div class="w-[0%] h-full bg-suit-red-cb"></div>
+</div>
+</div>
+</div>
+<!-- Action Button -->
+<button class="h-[56px] w-full bg-suit-red-cb flex items-center justify-center gap-2 hover:opacity-90 active:opacity-75 transition-opacity">
+<span class="font-headline font-bold text-[14px] text-background tracking-wider">▶ CONTINUE</span>
+</button>
+<!-- Scanline layer inside card -->
+<div class="absolute inset-0 scanline-overlay opacity-20 pointer-events-none"></div>
+</div>
+<!-- Caption -->
+<div class="absolute bottom-8 w-full text-center">
+<span class="font-body-md text-[11px] text-[#a0a0a0] uppercase tracking-widest opacity-60">Tap anywhere to dismiss</span>
+</div>
+</div>
+<!-- Bottom Nav Bar -->
+<nav class="fixed bottom-0 w-full z-50 flex justify-between items-center h-action-bar-height bg-surface-container dark:bg-surface-container border-t border-outline dark:border-outline">
+<div class="flex flex-col items-center justify-center bg-primary text-background p-2 w-1/5 h-full transition-colors font-label-caps text-label-caps uppercase tracking-widest">
+<span class="material-symbols-outlined" data-icon="videogame_asset">videogame_asset</span>
+<span>NORMAL</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 w-1/5 h-full hover:text-primary transition-colors font-label-caps text-label-caps uppercase tracking-widest">
+<span class="material-symbols-outlined" data-icon="edit">edit</span>
+<span>INSERT</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 w-1/5 h-full hover:text-primary transition-colors font-label-caps text-label-caps uppercase tracking-widest">
+<span class="material-symbols-outlined" data-icon="visibility">visibility</span>
+<span>VISUAL</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 w-1/5 h-full hover:text-primary transition-colors font-label-caps text-label-caps uppercase tracking-widest">
+<span class="material-symbols-outlined" data-icon="auto_fix_high">auto_fix_high</span>
+<span>SOLVE</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 w-1/5 h-full hover:text-primary transition-colors font-label-caps text-label-caps uppercase tracking-widest">
+<span class="material-symbols-outlined" data-icon="power_settings_new">power_settings_new</span>
+<span>QUIT</span>
+</div>
+</nav>
+<!-- Persistent Background Overlay (CRT Effect) -->
+<div class="fixed inset-0 pointer-events-none z-[200] scanline-overlay opacity-30"></div>
+</body></html>

docs/ui-mockups/onboarding-draw-mobile.html

@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<script id="tailwind-config">
+    tailwind.config = {
+      darkMode: "class",
+      theme: {
+        extend: {
+          "colors": {
+                  "tertiary": "#f7c3ff",
+                  "surface": "#151515",
+                  "surface-container-lowest": "#0b0f11",
+                  "surface-variant": "#313538",
+                  "surface-tint": "#7ed0fe",
+                  "primary": "#a1dcff",
+                  "on-tertiary-fixed-variant": "#653173",
+                  "on-error-container": "#ffdad6",
+                  "on-tertiary-container": "#683476",
+                  "secondary": "#bad073",
+                  "surface-dim": "#101417",
+                  "inverse-on-surface": "#2d3134",
+                  "on-tertiary": "#4c195b",
+                  "surface-container-high": "#272a2d",
+                  "on-primary-fixed-variant": "#004c69",
+                  "surface-container": "#202020",
+                  "highlight-celebration": "#e1a3ee",
+                  "background": "#101417",
+                  "suit-red": "#fb9fb1",
+                  "on-secondary-container": "#b2c86d",
+                  "inverse-surface": "#e0e3e6",
+                  "error": "#fb9fb1",
+                  "on-surface": "#d0d0d0",
+                  "info": "#12cfc0",
+                  "secondary-container": "#435401",
+                  "tertiary-fixed-dim": "#f0b0fc",
+                  "surface-bright": "#363a3d",
+                  "outline-variant": "#3f484e",
+                  "on-secondary-fixed-variant": "#3c4d00",
+                  "warning": "#ddb26f",
+                  "surface-container-highest": "#313538",
+                  "secondary-fixed": "#d5ec8c",
+                  "highlight-valid": "#acc267",
+                  "secondary-fixed-dim": "#bad073",
+                  "tertiary-container": "#e1a3ee",
+                  "suit-red-cb": "#6fc2ef",
+                  "on-error": "#690005",
+                  "on-primary-container": "#004f6c",
+                  "suit-black": "#d0d0d0",
+                  "inverse-primary": "#00668a",
+                  "surface-container-low": "#181c1f",
+                  "on-primary-fixed": "#001e2c",
+                  "on-secondary": "#293500",
+                  "primary-fixed": "#c4e7ff",
+                  "on-tertiary-fixed": "#340043",
+                  "outline": "#505050",
+                  "error-container": "#93000a",
+                  "tertiary-fixed": "#fbd7ff",
+                  "primary-container": "#6fc2ef",
+                  "on-background": "#e0e3e6",
+                  "on-primary": "#003549",
+                  "on-surface-variant": "#bfc8cf",
+                  "on-secondary-fixed": "#161e00",
+                  "primary-fixed-dim": "#7ed0fe"
+          },
+          "borderRadius": {
+                  "DEFAULT": "0.125rem",
+                  "lg": "0.25rem",
+                  "xl": "0.5rem",
+                  "full": "0.75rem"
+          },
+          "spacing": {
+                  "margin-edge": "1rem",
+                  "gutter-card": "0.375rem",
+                  "touch-target-min": "48dp",
+                  "stack-overlap": "2rem",
+                  "action-bar-height": "64px"
+          },
+          "fontFamily": {
+                  "card-rank": ["JetBrains Mono"],
+                  "hud-timer": ["JetBrains Mono"],
+                  "body-md": ["Inter"],
+                  "headline": ["JetBrains Mono"],
+                  "label-caps": ["JetBrains Mono"],
+                  "hud-score": ["JetBrains Mono"]
+          },
+          "fontSize": {
+                  "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                  "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                  "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                  "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                  "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                  "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}]
+          }
+        },
+      },
+    }
+  </script>
+<style>
+    .material-symbols-outlined {
+      font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+    }
+    body {
+      background-color: #151515;
+      color: #d0d0d0;
+      -webkit-font-smoothing: antialiased;
+    }
+    .card-scanline {
+      background: linear-gradient(rgba(21, 21, 21, 0) 50%, rgba(26, 26, 26, 1) 50%);
+      background-size: 100% 4px;
+    }
+  </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="flex items-center justify-center min-h-screen">
+<!-- Mobile Canvas (390x844 simulated) -->
+<main class="w-[390px] h-[844px] bg-surface relative overflow-hidden flex flex-col">
+<!-- Status Bar -->
+<header class="h-8 bg-surface-container flex items-center justify-between px-margin-edge border-b border-outline-variant">
+<div class="font-hud-timer text-[11px] text-primary tracking-tight">▌onboard/01-draw.tsx</div>
+<div class="font-hud-timer text-[11px] text-on-surface-variant font-bold">STEP 1 OF 3</div>
+</header>
+<!-- Content Canvas -->
+<div class="flex-1 overflow-y-auto pb-action-bar-height">
+<!-- Hero Section -->
+<section class="h-[140px] flex flex-col items-center justify-center mt-8">
+<div class="w-8 h-12 bg-primary animate-pulse mb-2"></div>
+<h1 class="font-headline text-headline text-on-surface uppercase tracking-tighter">
+          WELCOME <span class="text-primary">▌_</span>
+</h1>
+</section>
+<!-- Headline -->
+<section class="px-margin-edge mt-4 text-center">
+<h2 class="font-headline text-[22px] leading-tight text-on-surface mb-1">CHOOSE A DRAW MODE</h2>
+<p class="font-body-md text-[12px] text-on-surface-variant">You can change this any time in Settings.</p>
+</section>
+<!-- Choice Cards -->
+<section class="px-margin-edge mt-8 space-y-4">
+<!-- DRAW-3 Card -->
+<div class="h-[120px] bg-surface-container border border-primary p-4 relative flex items-start gap-4">
+<div class="absolute top-0 right-0 bg-primary px-2 py-0.5">
+<span class="font-label-caps text-[10px] text-surface font-bold">RECOMMENDED</span>
+</div>
+<div class="w-12 h-16 flex items-center justify-center border border-outline-variant bg-surface-dim">
+<span class="material-symbols-outlined text-primary" data-icon="filter_3">filter_3</span>
+</div>
+<div class="flex-1">
+<h3 class="font-headline text-[16px] text-primary mb-1">DRAW-3 (CLASSIC)</h3>
+<p class="font-hud-timer text-[12px] leading-snug text-on-surface-variant">
+              Cycle 3 cards at a time. Standard solitaire rules for a tactical challenge.
+            </p>
+</div>
+</div>
+<!-- DRAW-1 Card -->
+<div class="h-[120px] bg-surface-container border border-outline-variant p-4 flex items-start gap-4">
+<div class="w-12 h-16 flex items-center justify-center border border-outline-variant bg-surface-dim">
+<span class="material-symbols-outlined text-on-surface-variant" data-icon="filter_1">filter_1</span>
+</div>
+<div class="flex-1">
+<h3 class="font-headline text-[16px] text-on-surface mb-1">DRAW-1 (EASY)</h3>
+<p class="font-hud-timer text-[12px] leading-snug text-on-surface-variant">
+              Cycle one card at a time. More winnable, faster pace, perfect for quick sessions.
+            </p>
+</div>
+</div>
+</section>
+<!-- Step Indicator -->
+<section class="mt-12 flex flex-col items-center">
+<div class="flex gap-2 mb-2">
+<div class="w-8 h-1.5 bg-primary"></div>
+<div class="w-8 h-1.5 bg-outline-variant"></div>
+<div class="w-8 h-1.5 bg-outline-variant"></div>
+</div>
+<div class="font-hud-timer text-[12px] flex gap-4">
+<span class="text-primary font-bold">[1]</span>
+<span class="text-outline-variant">[2]</span>
+<span class="text-outline-variant">[3]</span>
+</div>
+</section>
+</div>
+<!-- Bottom Action Bar -->
+<footer class="h-action-bar-height bg-surface-container border-t border-outline flex items-center justify-between px-margin-edge fixed bottom-0 w-[390px] z-50">
+<!-- Back Button (Disabled/Muted) -->
+<button class="w-[48%] h-12 border border-outline-variant flex items-center justify-center gap-2 opacity-40 cursor-not-allowed">
+<span class="material-symbols-outlined text-outline-variant text-[18px]" data-icon="arrow_back">arrow_back</span>
+<span class="font-label-caps text-outline-variant">BACK</span>
+</button>
+<!-- Next Button -->
+<button class="w-[48%] h-12 bg-primary flex items-center justify-center gap-2 active:opacity-80 transition-opacity">
+<span class="font-headline text-[14px] text-surface font-bold uppercase tracking-widest">NEXT</span>
+<span class="material-symbols-outlined text-surface text-[18px]" data-icon="arrow_forward">arrow_forward</span>
+</button>
+</footer>
+<!-- Terminal Overlay (Faint scanlines for atmosphere) -->
+<div class="pointer-events-none absolute inset-0 opacity-[0.03] card-scanline z-[100]"></div>
+</main>
+</body></html>

docs/ui-mockups/onboarding-tap-mobile.html

@@ -0,0 +1,211 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+      tailwind.config = {
+        darkMode: "class",
+        theme: {
+          extend: {
+            "colors": {
+                "outline-variant": "#3f484e",
+                "tertiary-fixed-dim": "#f0b0fc",
+                "surface-bright": "#363a3d",
+                "secondary-container": "#435401",
+                "info": "#12cfc0",
+                "on-secondary-fixed-variant": "#3c4d00",
+                "highlight-celebration": "#e1a3ee",
+                "surface-container": "#202020",
+                "on-primary-fixed-variant": "#004c69",
+                "on-surface": "#d0d0d0",
+                "on-secondary-container": "#b2c86d",
+                "inverse-surface": "#e0e3e6",
+                "error": "#fb9fb1",
+                "background": "#101417",
+                "suit-red": "#fb9fb1",
+                "surface-dim": "#101417",
+                "inverse-on-surface": "#2d3134",
+                "on-tertiary-container": "#683476",
+                "secondary": "#bad073",
+                "primary": "#a1dcff",
+                "on-tertiary-fixed-variant": "#653173",
+                "on-error-container": "#ffdad6",
+                "surface-container-high": "#272a2d",
+                "on-tertiary": "#4c195b",
+                "tertiary": "#f7c3ff",
+                "surface": "#151515",
+                "surface-tint": "#7ed0fe",
+                "surface-variant": "#313538",
+                "surface-container-lowest": "#0b0f11",
+                "on-surface-variant": "#bfc8cf",
+                "on-primary": "#003549",
+                "primary-fixed-dim": "#7ed0fe",
+                "on-secondary-fixed": "#161e00",
+                "on-tertiary-fixed": "#340043",
+                "outline": "#505050",
+                "on-secondary": "#293500",
+                "primary-fixed": "#c4e7ff",
+                "primary-container": "#6fc2ef",
+                "on-background": "#e0e3e6",
+                "tertiary-fixed": "#fbd7ff",
+                "error-container": "#93000a",
+                "suit-red-cb": "#6fc2ef",
+                "surface-container-low": "#181c1f",
+                "on-primary-fixed": "#001e2c",
+                "on-primary-container": "#004f6c",
+                "suit-black": "#d0d0d0",
+                "inverse-primary": "#00668a",
+                "on-error": "#690005",
+                "secondary-fixed-dim": "#bad073",
+                "surface-container-highest": "#313538",
+                "secondary-fixed": "#d5ec8c",
+                "highlight-valid": "#acc267",
+                "warning": "#ddb26f",
+                "tertiary-container": "#e1a3ee"
+            },
+            "borderRadius": {
+                "DEFAULT": "0.125rem",
+                "lg": "0.25rem",
+                "xl": "0.5rem",
+                "full": "0.75rem"
+            },
+            "spacing": {
+                "margin-edge": "1rem",
+                "gutter-card": "0.375rem",
+                "touch-target-min": "48dp",
+                "stack-overlap": "2rem",
+                "action-bar-height": "64px"
+            },
+            "fontFamily": {
+                "label-caps": ["JetBrains Mono"],
+                "hud-score": ["JetBrains Mono"],
+                "headline": ["JetBrains Mono"],
+                "card-rank": ["JetBrains Mono"],
+                "hud-timer": ["JetBrains Mono"],
+                "body-md": ["Inter"]
+            },
+            "fontSize": {
+                "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+            }
+          },
+        },
+      }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .scanline-bg {
+            background: linear-gradient(to bottom, #1a1a1a 1px, transparent 1px);
+            background-size: 100% 2px;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-surface font-body-md select-none overflow-hidden h-screen flex flex-col">
+<!-- Top Navigation Bar -->
+<header class="fixed top-0 w-full bg-background z-50 border-b border-outline flex justify-between items-center px-margin-edge h-action-bar-height">
+<div class="flex items-center gap-2">
+<span class="material-symbols-outlined text-primary" data-icon="terminal">terminal</span>
+<span class="font-headline text-headline text-primary uppercase tracking-tighter text-sm md:text-base">▌onboard/03-demo.tsx</span>
+</div>
+<div class="font-label-caps text-label-caps text-on-surface-variant">STEP 3 OF 3</div>
+</header>
+<main class="flex-1 mt-[64px] mb-[64px] flex flex-col items-center px-margin-edge pt-6 space-y-6 overflow-y-auto">
+<!-- Header Text -->
+<div class="w-full text-center space-y-2">
+<h1 class="font-headline text-headline text-on-surface">TRY IT OUT</h1>
+<p class="font-body-md text-on-surface-variant max-w-xs mx-auto">Tap a face-up card to auto-move it to the best legal pile.</p>
+</div>
+<!-- Demo Panel -->
+<div class="w-full max-w-sm bg-surface border border-outline p-6 rounded-lg relative overflow-hidden">
+<!-- Subtle scanline background effect for "terminal" pane feel -->
+<div class="absolute inset-0 scanline-bg opacity-10 pointer-events-none"></div>
+<div class="relative z-10 flex flex-col items-center">
+<!-- Foundation Slot -->
+<div class="w-20 h-28 border border-dashed border-outline-variant flex items-center justify-center mb-12">
+<span class="material-symbols-outlined text-outline-variant opacity-40 text-4xl" data-icon="spades">playing_cards</span>
+</div>
+<!-- Path Indicator (The Arrow) -->
+<div class="absolute top-[84px] left-1/2 -translate-x-1/2 flex flex-col items-center">
+<div class="font-label-caps text-secondary text-[10px] mb-1">MOVES HERE</div>
+<span class="material-symbols-outlined text-secondary text-3xl font-bold" data-icon="arrow_upward">arrow_upward</span>
+</div>
+<!-- Mini-Cards Row -->
+<div class="flex gap-gutter-card">
+<!-- A-Spades (Target) -->
+<div class="w-20 h-28 bg-surface border-2 border-primary rounded flex flex-col justify-between p-2 relative ring-1 ring-primary ring-offset-2 ring-offset-surface">
+<div class="font-card-rank text-card-rank text-suit-black">A</div>
+<span class="material-symbols-outlined self-end text-3xl text-suit-black" data-icon="spades" style="font-variation-settings: 'FILL' 1;">playing_cards</span>
+<!-- Pulse Icon -->
+<div class="absolute inset-0 flex items-center justify-center">
+<span class="material-symbols-outlined text-primary text-4xl opacity-80" data-icon="touch_app">touch_app</span>
+</div>
+</div>
+<!-- K-Hearts -->
+<div class="w-20 h-28 bg-surface border border-suit-red rounded flex flex-col justify-between p-2 opacity-50">
+<div class="font-card-rank text-card-rank text-suit-red">K</div>
+<span class="material-symbols-outlined self-end text-3xl text-suit-red" data-icon="favorite" style="font-variation-settings: 'FILL' 1;">favorite</span>
+</div>
+<!-- Q-Clubs -->
+<div class="w-20 h-28 bg-surface border border-outline rounded flex flex-col justify-between p-2 opacity-50">
+<div class="font-card-rank text-card-rank text-on-surface">Q</div>
+<span class="material-symbols-outlined self-end text-3xl text-on-surface" data-icon="clubs">groups</span>
+</div>
+</div>
+</div>
+</div>
+<!-- CLI Prompt -->
+<div class="w-full max-w-sm flex items-center gap-2 font-label-caps text-on-surface py-2">
+<span class="text-primary">▌</span>
+<span class="tracking-widest">TAP THE A♠ TO CONTINUE</span>
+<span class="w-3 h-5 bg-primary animate-pulse"></span>
+</div>
+<!-- Feature List -->
+<div class="w-full max-w-sm space-y-3 pt-2">
+<div class="flex items-center gap-3">
+<span class="material-symbols-outlined text-secondary text-sm" data-icon="check_circle" style="font-variation-settings: 'FILL' 1;">check_circle</span>
+<span class="font-label-caps text-label-caps">TAP TO AUTO-MOVE</span>
+</div>
+<div class="flex items-center gap-3">
+<span class="material-symbols-outlined text-secondary text-sm" data-icon="check_circle" style="font-variation-settings: 'FILL' 1;">check_circle</span>
+<span class="font-label-caps text-label-caps">DRAG TO TARGET PILE</span>
+</div>
+<div class="flex items-center gap-3">
+<span class="material-symbols-outlined text-secondary text-sm" data-icon="check_circle" style="font-variation-settings: 'FILL' 1;">check_circle</span>
+<span class="font-label-caps text-label-caps">DOUBLE-TAP TO FOUNDATION</span>
+</div>
+</div>
+<!-- Step Indicators -->
+<div class="flex gap-2 py-4">
+<div class="w-8 h-1 bg-primary"></div>
+<div class="w-8 h-1 bg-primary"></div>
+<div class="w-8 h-1 bg-primary"></div>
+</div>
+</main>
+<!-- Bottom Action Bar -->
+<footer class="fixed bottom-0 w-full h-[64px] bg-surface-container border-t border-outline flex items-center px-margin-edge justify-between z-50">
+<button class="px-6 py-2 border border-outline text-on-surface-variant font-label-caps text-label-caps transition-colors duration-120 active:bg-surface-bright flex items-center gap-2">
+<span class="material-symbols-outlined text-sm" data-icon="arrow_back">arrow_back</span>
+            BACK
+        </button>
+<button class="px-6 py-2 bg-primary text-on-primary font-label-caps text-label-caps transition-colors duration-120 active:bg-primary-container flex items-center gap-2">
+<span class="material-symbols-outlined text-sm" data-icon="play_arrow" style="font-variation-settings: 'FILL' 1;">play_arrow</span>
+            START PLAYING
+        </button>
+</footer>
+</body></html>

docs/ui-mockups/onboarding-theme-mobile.html

@@ -0,0 +1,218 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=390, height=844, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500;700&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "highlight-valid": "#acc267",
+                        "outline": "#505050",
+                        "highlight-celebration": "#e1a3ee",
+                        "error-container": "#93000a",
+                        "surface-container": "#202020",
+                        "on-secondary-fixed": "#161e00",
+                        "tertiary": "#f7c3ff",
+                        "inverse-on-surface": "#2d3134",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "on-primary-fixed": "#001e2c",
+                        "info": "#12cfc0",
+                        "on-tertiary": "#4c195b",
+                        "secondary-container": "#435401",
+                        "surface": "#151515",
+                        "tertiary-container": "#e1a3ee",
+                        "outline-variant": "#3f484e",
+                        "suit-red": "#fb9fb1",
+                        "secondary-fixed": "#d5ec8c",
+                        "error": "#fb9fb1",
+                        "primary-container": "#6fc2ef",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-surface": "#e0e3e6",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-secondary-container": "#b2c86d",
+                        "on-primary-fixed-variant": "#004c69",
+                        "on-primary": "#003549",
+                        "on-secondary": "#293500",
+                        "on-primary-container": "#004f6c",
+                        "secondary": "#bad073",
+                        "surface-container-highest": "#313538",
+                        "primary": "#a1dcff",
+                        "surface-container-low": "#181c1f",
+                        "secondary-fixed-dim": "#bad073",
+                        "warning": "#ddb26f",
+                        "suit-black": "#d0d0d0",
+                        "surface-variant": "#313538",
+                        "on-tertiary-container": "#683476",
+                        "on-tertiary-fixed": "#340043",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-background": "#e0e3e6",
+                        "surface-bright": "#363a3d",
+                        "on-error": "#690005",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "suit-red-cb": "#6fc2ef",
+                        "inverse-surface": "#e0e3e6",
+                        "on-surface-variant": "#bfc8cf",
+                        "background": "#101417",
+                        "primary-fixed": "#c4e7ff",
+                        "on-error-container": "#ffdad6",
+                        "inverse-primary": "#00668a",
+                        "surface-dim": "#101417",
+                        "surface-container-high": "#272a2d",
+                        "surface-tint": "#7ed0fe",
+                        "cyan-terminal": "#6fc2ef"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "touch-target-min": "48dp",
+                        "stack-overlap": "2rem",
+                        "gutter-card": "0.375rem",
+                        "action-bar-height": "64px",
+                        "margin-edge": "1rem"
+                    },
+                    "fontFamily": {
+                        "headline": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "hud-score": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"]
+                    }
+                }
+            }
+        }
+    </script>
+<style>
+        .scanline-pattern {
+            background: repeating-linear-gradient(
+                0deg,
+                #151515,
+                #151515 2px,
+                #1a1a1a 2px,
+                #1a1a1a 4px
+            );
+        }
+        .checker-pattern {
+            background-color: #ffffff;
+            background-image: 
+                linear-gradient(45deg, #004c69 25%, transparent 25%), 
+                linear-gradient(-45deg, #004c69 25%, transparent 25%), 
+                linear-gradient(45deg, transparent 75%, #004c69 75%), 
+                linear-gradient(-45deg, transparent 75%, #004c69 75%);
+            background-size: 8px 8px;
+            background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
+        }
+        .stripe-pattern {
+            background: repeating-linear-gradient(
+                0deg,
+                #fb9fb1,
+                #fb9fb1 4px,
+                #151515 4px,
+                #151515 8px
+            );
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface text-on-surface min-h-screen flex flex-col items-center overflow-hidden selection:bg-cyan-terminal selection:text-surface">
+<!-- 1. Status Bar -->
+<header class="w-full h-8 bg-surface-container flex items-center justify-between px-4 border-b border-outline-variant">
+<span class="font-label-caps text-[12px] text-on-surface uppercase tracking-tight">▌onboard/02-theme.tsx</span>
+<span class="font-label-caps text-[12px] text-[#a0a0a0] uppercase tracking-widest">STEP 2 OF 3</span>
+</header>
+<!-- 2. Hero Illustration Band -->
+<section class="w-full flex flex-col items-center pt-8 pb-4">
+<div class="h-[100px] flex items-center justify-center relative">
+<span class="text-cyan-terminal font-headline text-[48px] mr-4 select-none">▌</span>
+<div class="flex -space-x-4">
+<div class="w-[24px] h-[34px] border border-outline bg-surface scanline-pattern transform -rotate-12 translate-y-2"></div>
+<div class="w-[24px] h-[34px] border border-outline bg-surface checker-pattern transform rotate-0 z-10"></div>
+<div class="w-[24px] h-[34px] border border-outline bg-surface stripe-pattern transform rotate-12 translate-y-2"></div>
+</div>
+</div>
+<h2 class="font-headline text-[28px] font-bold text-suit-black tracking-tight leading-none">PICK YOUR DECK</h2>
+</section>
+<!-- 3. Headline & Description -->
+<section class="w-full px-margin-edge text-center mb-6">
+<h3 class="font-headline text-[22px] font-bold text-suit-black mb-1">CHOOSE A CARD-BACK</h3>
+<p class="font-body-md text-[12px] text-[#a0a0a0] leading-tight">
+            You can swap or import more themes from Settings later.
+        </p>
+</section>
+<!-- 4. Theme Selection Grid -->
+<main class="w-full px-margin-edge grid grid-cols-3 gap-2 flex-grow max-h-[220px]">
+<!-- Tile 1: Terminal (Active) -->
+<div class="flex flex-col items-center">
+<div class="w-full aspect-[110/150] bg-surface-container border-2 border-cyan-terminal rounded-lg p-3 relative flex items-center justify-center overflow-hidden">
+<div class="w-full h-full scanline-pattern border border-outline-variant relative">
+<div class="absolute top-1 left-1 w-2 h-3 bg-cyan-terminal"></div>
+<div class="absolute bottom-1 right-1 font-headline text-[10px] text-on-surface opacity-50">▌RS</div>
+</div>
+<div class="absolute top-1 right-1 bg-cyan-terminal text-surface w-4 h-4 flex items-center justify-center rounded-full">
+<span class="material-symbols-outlined text-[12px] font-bold">check</span>
+</div>
+</div>
+<span class="mt-2 font-label-caps text-[12px] font-bold text-suit-black tracking-widest uppercase">TERMINAL</span>
+</div>
+<!-- Tile 2: Classic -->
+<div class="flex flex-col items-center opacity-70">
+<div class="w-full aspect-[110/150] bg-surface-container border border-outline rounded-lg p-3 relative flex items-center justify-center overflow-hidden">
+<div class="w-full h-full checker-pattern border border-outline-variant"></div>
+</div>
+<span class="mt-2 font-label-caps text-[12px] font-bold text-suit-black tracking-widest uppercase">CLASSIC</span>
+</div>
+<!-- Tile 3: Stripes -->
+<div class="flex flex-col items-center opacity-70">
+<div class="w-full aspect-[110/150] bg-surface-container border border-outline rounded-lg p-3 relative flex items-center justify-center overflow-hidden">
+<div class="w-full h-full stripe-pattern border border-outline-variant"></div>
+</div>
+<span class="mt-2 font-label-caps text-[12px] font-bold text-suit-black tracking-widest uppercase">STRIPES</span>
+</div>
+</main>
+<!-- 5. More Info -->
+<div class="w-full text-center mt-4">
+<span class="font-label-caps text-[11px] font-medium text-[#a0a0a0] tracking-widest">
+<span class="text-cyan-terminal">+</span> MORE IN SETTINGS
+        </span>
+</div>
+<!-- 6. Step Indicator -->
+<section class="w-full flex flex-col items-center mt-6">
+<div class="flex gap-1 h-2 mb-2">
+<div class="w-8 h-1 bg-cyan-terminal rounded-full"></div>
+<div class="w-8 h-1 bg-cyan-terminal rounded-full"></div>
+<div class="w-8 h-1 bg-outline rounded-full"></div>
+</div>
+<div class="font-headline text-[12px] font-medium tracking-[0.2em]">
+<span class="text-cyan-terminal">[1]</span>
+<span class="text-cyan-terminal">[2]</span>
+<span class="text-outline">[3]</span>
+</div>
+</section>
+<!-- 7. Bottom Action Bar -->
+<footer class="fixed bottom-0 w-full h-[64px] bg-surface-container flex items-center justify-between px-margin-edge z-50">
+<button class="w-[48%] h-12 border border-outline bg-transparent text-suit-black font-label-caps text-[13px] font-medium uppercase rounded-lg active:bg-surface-variant transition-colors">
+            ← BACK
+        </button>
+<button class="w-[48%] h-12 bg-cyan-terminal text-surface font-label-caps text-[14px] font-bold uppercase rounded-lg active:opacity-80 transition-opacity">
+            NEXT →
+        </button>
+</footer>
+<!-- Image descriptive data for the model (hidden visually) -->
+<div class="hidden" data-alt="A detailed user interface screen for a retro-terminal themed solitaire game called Rusty Solitaire. The background is a deep black with cyan and gray accents. In the center, a card theme selection grid displays three different card back designs: a scanline pattern, a checker pattern, and a striped pattern. The visual style is crisp, technical, and uses monospaced typography to evoke a command-line interface or professional developer environment. The mood is minimalist, efficient, and technologically nostalgic."></div>
+</body></html>

docs/ui-mockups/pause-menu-mobile.html

@@ -0,0 +1,212 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rouge Solitaire - Pause</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&amp;family=JetBrains+Mono:wght@400;500;700;800&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "on-secondary-fixed": "#161e00",
+                        "secondary-fixed": "#d5ec8c",
+                        "warning": "#ddb26f",
+                        "surface-container-low": "#181c1f",
+                        "surface-container": "#1c2023",
+                        "on-primary-fixed-variant": "#004c69",
+                        "outline-variant": "#3f484e",
+                        "on-tertiary-container": "#683476",
+                        "surface-container-high": "#272a2d",
+                        "on-primary-fixed": "#001e2c",
+                        "primary-fixed": "#c4e7ff",
+                        "surface-bright": "#363a3d",
+                        "outline": "#505050",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "tertiary": "#f7c3ff",
+                        "on-surface": "#e0e3e6",
+                        "secondary": "#bad073",
+                        "tertiary-fixed": "#fbd7ff",
+                        "info": "#12cfc0",
+                        "primary": "#a1dcff",
+                        "secondary-fixed-dim": "#bad073",
+                        "surface-tint": "#7ed0fe",
+                        "background": "#101417",
+                        "surface-container-highest": "#313538",
+                        "on-tertiary-fixed": "#340043",
+                        "highlight-valid": "#acc267",
+                        "inverse-primary": "#00668a",
+                        "surface-dim": "#101417",
+                        "error": "#fb9fb1",
+                        "on-error": "#690005",
+                        "inverse-surface": "#e0e3e6",
+                        "suit-red": "#fb9fb1",
+                        "suit-black": "#d0d0d0",
+                        "inverse-on-surface": "#2d3134",
+                        "highlight-celebration": "#e1a3ee",
+                        "on-error-container": "#ffdad6",
+                        "on-primary": "#003549",
+                        "surface": "#151515",
+                        "surface-container-lowest": "#0b0f11",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "on-secondary": "#293500",
+                        "suit-red-cb": "#6fc2ef",
+                        "on-tertiary": "#4c195b",
+                        "error-container": "#93000a",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-secondary-container": "#b2c86d",
+                        "on-surface-variant": "#bfc8cf",
+                        "on-primary-container": "#004f6c",
+                        "primary-container": "#6fc2ef",
+                        "on-background": "#e0e3e6",
+                        "surface-variant": "#313538",
+                        "secondary-container": "#435401",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "tertiary-container": "#e1a3ee"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "touch-target-min": "48dp",
+                        "action-bar-height": "64px",
+                        "stack-overlap": "2rem",
+                        "margin-edge": "1rem",
+                        "gutter-card": "0.375rem"
+                    },
+                    "fontFamily": {
+                        "body-md": ["Inter"],
+                        "headline": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .scanline {
+            background: linear-gradient(
+                to bottom,
+                transparent 50%,
+                rgba(0, 0, 0, 0.05) 50%
+            );
+            background-size: 100% 4px;
+            pointer-events: none;
+        }
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-surface font-body-md overflow-hidden antialiased">
+<!-- Background Tableau (Simulated by Dimmed Image Overlay) -->
+<div class="fixed inset-0 z-0">
+<img alt="Game Tableau Background" class="w-full h-full object-cover" src="https://lh3.googleusercontent.com/aida-public/AB6AXuDJSHHDQ5Y5qul5C_xabnOSM9aS3uxcWSTk47AOHrS_KIlQi0Ur7YhtL0BomjEWTDc8vRLpytWeG4kf5xgxBzpORahTtsWyXOUPsVRg6_H_qp0QjM6DDo57rOPwjU6TFdfK3Pi7cO9rg-xnUSSu1wu29WyKVwSWDDaA5cZ4QN_9L81YMTCTMKAwDTGsY3eGsj1b1i1X2CdF211aepkhmX8xf4bnV35WSB3QuYxUwlPct0Met7iLFf-AGBeizhK6IAboW5u-Wpg8Ag"/>
+<!-- 95% Opacity Scrim -->
+<div class="absolute inset-0 bg-surface opacity-95"></div>
+<!-- Scanline Overlay for Texture -->
+<div class="absolute inset-0 scanline"></div>
+</div>
+<!-- Modal Container -->
+<div class="fixed inset-0 z-10 flex items-center justify-center p-margin-edge">
+<!-- Modal Panel -->
+<div class="w-[330px] h-[480px] bg-[#202020] border border-outline rounded-xl flex flex-col overflow-hidden">
+<!-- Title Bar -->
+<div class="h-[28px] bg-[#1a1a1a] border-b border-[#353535] px-3 flex items-center justify-between">
+<div class="flex items-center gap-1.5">
+<span class="text-primary-container font-headline text-[12px] leading-none mt-px">▌</span>
+<span class="font-headline text-[12px] text-[#a0a0a0] leading-none">pause.tsx</span>
+</div>
+<button class="flex items-center justify-center">
+<span class="material-symbols-outlined text-[16px] text-[#505050]">close</span>
+</button>
+</div>
+<!-- Content Canvas -->
+<div class="flex-1 flex flex-col items-center pt-8 px-4">
+<!-- Headline -->
+<h1 class="font-headline text-[24px] font-bold text-[#d0d0d0] tracking-tight text-center">
+                    GAME PAUSED
+                </h1>
+<!-- Subline -->
+<p class="font-headline text-[12px] text-[#a0a0a0] mt-1 text-center">
+                    12:34 ELAPSED · 87 MOVES · DRAW-3
+                </p>
+<!-- Mini-Stat Chips -->
+<div class="flex gap-2 mt-4 justify-center">
+<div class="bg-[#1a1a1a] border border-[#353535] rounded-sm px-2 py-1 flex flex-col items-center">
+<span class="font-headline text-[11px] text-[#d0d0d0]">SCORE 247</span>
+</div>
+<div class="bg-[#1a1a1a] border border-[#353535] rounded-sm px-2 py-1 flex flex-col items-center">
+<span class="font-headline text-[11px] text-[#d0d0d0]">STOCK 18</span>
+</div>
+<div class="bg-[#1a1a1a] border border-[#353535] rounded-sm px-2 py-1 flex flex-col items-center">
+<span class="font-headline text-[11px] text-[#d0d0d0]">MOVES 87</span>
+</div>
+</div>
+<!-- Action Buttons Cluster -->
+<div class="w-full mt-6 space-y-3">
+<!-- Primary CTA -->
+<button class="w-full h-[48px] bg-primary-container text-surface flex items-center justify-center rounded-lg active:scale-95 transition-transform duration-75">
+<span class="font-headline text-[14px] font-bold tracking-[0.08em] uppercase">▶ RESUME GAME</span>
+</button>
+<!-- Secondary Buttons -->
+<button class="w-full h-[48px] bg-transparent border border-outline text-[#d0d0d0] flex items-center justify-center rounded-lg hover:border-primary-container hover:text-primary-container transition-colors duration-120">
+<span class="font-headline text-[13px] font-medium tracking-[0.08em] uppercase">↻ RESTART</span>
+</button>
+<button class="w-full h-[48px] bg-transparent border border-outline text-[#d0d0d0] flex items-center justify-center rounded-lg hover:border-primary-container hover:text-primary-container transition-colors duration-120">
+<span class="font-headline text-[13px] font-medium tracking-[0.08em] uppercase">✕ FORFEIT</span>
+</button>
+<button class="w-full h-[48px] bg-transparent border border-outline text-[#d0d0d0] flex items-center justify-center rounded-lg hover:border-primary-container hover:text-primary-container transition-colors duration-120">
+<span class="font-headline text-[13px] font-medium tracking-[0.08em] uppercase">⌂ QUIT TO MENU</span>
+</button>
+</div>
+</div>
+<!-- Footer Status Line -->
+<div class="h-[24px] border-t border-[#353535] px-3 flex items-center justify-between">
+<div class="flex items-center gap-1">
+<span class="text-primary-container font-headline text-[11px]">▌</span>
+<span class="font-headline text-[11px] text-[#a0a0a0]">NORMAL</span>
+<span class="text-[#505050] text-[11px]">│</span>
+<span class="font-headline text-[11px] text-[#a0a0a0]">pause</span>
+</div>
+<div class="flex items-center gap-1 font-headline text-[11px]">
+<span class="text-[#a0a0a0]">[ESC]</span>
+<span class="text-[#505050]">resume</span>
+</div>
+</div>
+</div>
+</div>
+<!-- Hidden Navigation Shell (Suppressed due to Task-Focused Modal Context) -->
+<!-- But included visually as per the brand anchor hierarchy for TopAppBar identity if it were visible -->
+<header class="hidden fixed top-0 w-full h-action-bar-height flex items-center justify-between px-margin-edge w-full bg-background border-b border-outline-variant">
+<div class="flex items-center gap-2">
+<span class="material-symbols-outlined text-primary">terminal</span>
+<span class="font-headline text-headline text-primary uppercase tracking-tighter">▌ROUGE_SOLITAIRE</span>
+</div>
+</header>
+<!-- Bottom Nav Suppression Logic: Not rendered to prioritize the focus canvas -->
+</body></html>

docs/ui-mockups/profile-mobile.html

@@ -0,0 +1,274 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500;700&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+    .material-symbols-outlined {
+      font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+    }
+    /* CRT Scanline Overlay Effect */
+    .crt-overlay {
+      position: fixed;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
+      background-size: 100% 3px, 3px 100%;
+      pointer-events: none;
+      z-index: 100;
+    }
+    .custom-scrollbar::-webkit-scrollbar {
+      height: 4px;
+    }
+    .custom-scrollbar::-webkit-scrollbar-track {
+      background: #151515;
+    }
+    .custom-scrollbar::-webkit-scrollbar-thumb {
+      background: #505050;
+    }
+  </style>
+<script id="tailwind-config">
+    tailwind.config = {
+      darkMode: "class",
+      theme: {
+        extend: {
+          "colors": {
+            "surface-container-low": "#181c1f",
+            "on-primary-fixed": "#001e2c",
+            "on-error": "#690005",
+            "suit-black": "#d0d0d0",
+            "inverse-primary": "#00668a",
+            "on-primary-container": "#004f6c",
+            "suit-red-cb": "#6fc2ef",
+            "tertiary-container": "#e1a3ee",
+            "secondary-fixed": "#d5ec8c",
+            "highlight-valid": "#acc267",
+            "surface-container-highest": "#313538",
+            "secondary-fixed-dim": "#bad073",
+            "warning": "#ddb26f",
+            "on-secondary-fixed": "#161e00",
+            "primary-fixed-dim": "#7ed0fe",
+            "on-surface-variant": "#bfc8cf",
+            "on-primary": "#003549",
+            "tertiary-fixed": "#fbd7ff",
+            "primary-container": "#6fc2ef",
+            "on-background": "#e0e3e6",
+            "error-container": "#93000a",
+            "outline": "#505050",
+            "on-tertiary-fixed": "#340043",
+            "primary-fixed": "#c4e7ff",
+            "on-surface": "#e0e3e6",
+            "on-secondary": "#293500",
+            "surface-container-high": "#272a2d",
+            "on-tertiary": "#4c195b",
+            "secondary": "#bad073",
+            "on-tertiary-container": "#683476",
+            "inverse-on-surface": "#2d3134",
+            "surface-dim": "#101417",
+            "primary": "#a1dcff",
+            "on-tertiary-fixed-variant": "#653173",
+            "on-error-container": "#ffdad6",
+            "surface-variant": "#313538",
+            "surface-tint": "#7ed0fe",
+            "surface-container-lowest": "#0b0f11",
+            "surface": "#151515",
+            "tertiary": "#f7c3ff",
+            "on-secondary-fixed-variant": "#3c4d00",
+            "surface-bright": "#363a3d",
+            "tertiary-fixed-dim": "#f0b0fc",
+            "outline-variant": "#3f484e",
+            "info": "#12cfc0",
+            "secondary-container": "#435401",
+            "on-secondary-container": "#b2c86d",
+            "inverse-surface": "#e0e3e6",
+            "error": "#fb9fb1",
+            "suit-red": "#fb9fb1",
+            "background": "#101417",
+            "highlight-celebration": "#e1a3ee",
+            "on-primary-fixed-variant": "#004c69",
+            "surface-container": "#202020"
+          },
+          "borderRadius": {
+            "DEFAULT": "0.125rem",
+            "lg": "0.25rem",
+            "xl": "0.5rem",
+            "full": "0.75rem"
+          },
+          "spacing": {
+            "stack-overlap": "2rem",
+            "action-bar-height": "64px",
+            "touch-target-min": "48dp",
+            "gutter-card": "0.375rem",
+            "margin-edge": "1rem"
+          },
+          "fontFamily": {
+            "headline": ["JetBrains Mono"],
+            "label-caps": ["JetBrains Mono"],
+            "hud-score": ["JetBrains Mono"],
+            "hud-timer": ["JetBrains Mono"],
+            "body-md": ["Inter"],
+            "card-rank": ["JetBrains Mono"]
+          },
+          "fontSize": {
+            "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+            "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+            "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+            "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+            "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+            "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}]
+          }
+        },
+      },
+    }
+  </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-background font-body-md selection:bg-primary selection:text-background overflow-x-hidden">
+<div class="crt-overlay"></div>
+<!-- Status Bar -->
+<header class="bg-surface-container h-[32px] w-full flex items-center justify-between px-margin-edge z-50">
+<div class="font-headline text-[12px] text-on-surface-variant tracking-wider">
+      ▌profile.tsx
+    </div>
+<div class="flex items-center gap-2">
+<span class="w-2 h-2 rounded-full bg-info"></span>
+<span class="font-label-caps text-[10px] text-on-surface">● SYNCED</span>
+</div>
+</header>
+<!-- Main Canvas -->
+<main class="flex-1 overflow-y-auto pb-24">
+<!-- Profile Header -->
+<section class="h-[120px] bg-surface-container border-b border-outline-variant flex items-center px-margin-edge gap-4">
+<div class="w-[64px] h-[64px] bg-[#1a1a1a] border border-outline flex items-center justify-center shrink-0">
+<span class="font-headline text-[28px] text-primary-container">RS</span>
+</div>
+<div class="flex flex-col gap-1 overflow-hidden">
+<h1 class="font-headline text-[18px] text-on-surface truncate">anonymous@local</h1>
+<p class="font-label-caps text-on-surface-variant text-[10px]">MEMBER SINCE 2026-04-22</p>
+<div class="flex gap-2 mt-1">
+<span class="px-2 py-0.5 bg-[#1a1a1a] font-label-caps text-[10px] text-suit-black">247 GAMES</span>
+<span class="px-2 py-0.5 bg-[#1a1a1a] font-label-caps text-[10px] text-suit-black">61% WR</span>
+<span class="px-2 py-0.5 bg-[#1a1a1a] font-label-caps text-[10px] text-suit-black">12 STREAK</span>
+</div>
+</div>
+</section>
+<!-- Level/XP Section -->
+<section class="p-margin-edge bg-surface-container border-b border-outline-variant">
+<div class="flex justify-between items-baseline mb-2">
+<span class="font-headline text-[24px] text-on-surface">LEVEL 12</span>
+<span class="font-hud-timer text-on-surface-variant">320/500 XP</span>
+</div>
+<div class="h-3 w-full bg-[#353535] relative overflow-hidden">
+<div class="h-full bg-primary-container" style="width: 64%;"></div>
+</div>
+<div class="flex items-center gap-2 mt-3">
+<span class="w-1.5 h-1.5 rounded-full bg-highlight-celebration"></span>
+<span class="font-label-caps text-[10px] text-on-surface-variant">180 XP TO LEVEL 13</span>
+</div>
+</section>
+<!-- Unlocked Cards -->
+<section class="mt-6">
+<h2 class="px-margin-edge font-headline text-[14px] text-on-surface mb-4">▌ unlocked.cards</h2>
+<div class="flex overflow-x-auto gap-4 px-margin-edge pb-4 custom-scrollbar">
+<!-- Terminal (Active) -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[60px] h-[84px] bg-surface-container-low border-2 border-primary-container relative flex items-center justify-center p-1">
+<div class="w-full h-full bg-[#151515] overflow-hidden flex flex-col p-1">
+<div class="w-2 h-2.5 bg-primary-container mb-auto"></div>
+<div class="self-end text-[8px] font-headline text-on-surface-variant opacity-50">▌RS</div>
+</div>
+</div>
+<span class="font-label-caps text-[9px] text-primary-container text-center">ACTIVE</span>
+</div>
+<!-- Classic -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[60px] h-[84px] bg-white border border-outline relative p-1">
+<div class="w-full h-full border border-red-200 bg-red-50 opacity-20"></div>
+</div>
+<span class="font-label-caps text-[9px] text-on-surface-variant text-center opacity-50">TAP TO USE</span>
+</div>
+<!-- Stripes -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[60px] h-[84px] bg-surface-container border border-outline p-1">
+<div class="w-full h-full bg-gradient-to-br from-secondary-container via-surface to-secondary-container opacity-40"></div>
+</div>
+<span class="font-label-caps text-[9px] text-on-surface-variant text-center opacity-50">TAP TO USE</span>
+</div>
+<!-- Polka -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[60px] h-[84px] bg-surface-container border border-outline p-1 overflow-hidden relative">
+<div class="w-full h-full opacity-30" style="background-image: radial-gradient(#505050 1px, transparent 0); background-size: 6px 6px;"></div>
+</div>
+<span class="font-label-caps text-[9px] text-on-surface-variant text-center opacity-50">TAP TO USE</span>
+</div>
+</div>
+</section>
+<!-- Unlocked Backgrounds -->
+<section class="mt-6">
+<h2 class="px-margin-edge font-headline text-[14px] text-on-surface mb-4">▌ unlocked.backgrounds</h2>
+<div class="flex overflow-x-auto gap-4 px-margin-edge pb-4 custom-scrollbar">
+<!-- Default (Active) -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[80px] h-[56px] bg-[#151515] border-2 border-primary-container"></div>
+<span class="font-label-caps text-[9px] text-primary-container text-center">ACTIVE</span>
+</div>
+<!-- Forest -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[80px] h-[56px] bg-[#0d160d] border border-outline"></div>
+<span class="font-label-caps text-[9px] text-on-surface-variant text-center opacity-50">FOREST</span>
+</div>
+<!-- Slate -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[80px] h-[56px] bg-[#1c2128] border border-outline"></div>
+<span class="font-label-caps text-[9px] text-on-surface-variant text-center opacity-50">SLATE</span>
+</div>
+<!-- Midnight -->
+<div class="shrink-0 flex flex-col gap-2">
+<div class="w-[80px] h-[56px] bg-[#09090b] border border-outline"></div>
+<span class="font-label-caps text-[9px] text-on-surface-variant text-center opacity-50">MIDNIGHT</span>
+</div>
+</div>
+</section>
+<!-- Sign-in Card -->
+<section class="mt-8 px-margin-edge">
+<button class="w-full h-[64px] bg-surface-container border border-dashed border-outline flex items-center justify-between px-6 hover:bg-surface-variant transition-colors group">
+<span class="font-label-caps text-on-surface-variant tracking-widest">+ SIGN IN TO SYNC PROGRESS</span>
+<span class="material-symbols-outlined text-primary-container group-hover:translate-x-1 transition-transform">arrow_forward</span>
+</button>
+</section>
+</main>
+<!-- TopAppBar (from Shared Components - as Terminal Header) -->
+<div class="fixed top-[32px] left-0 w-full z-40 bg-background border-b border-outline-variant flex items-center justify-between px-margin-edge h-action-bar-height">
+<div class="flex items-center gap-3">
+<span class="material-symbols-outlined text-primary">terminal</span>
+<span class="font-headline text-headline text-primary tracking-tighter">~/root/usr/settings</span>
+</div>
+<div class="flex items-center">
+<button class="p-2 hover:bg-surface-variant text-primary transition-colors">
+<span class="material-symbols-outlined">close</span>
+</button>
+</div>
+</div>
+<!-- BottomNavBar (from Shared Components - as Terminal Footer) -->
+<nav class="fixed bottom-0 left-0 w-full z-50 h-[24px] bg-surface-container-lowest border-t border-outline-variant flex justify-between items-center px-4">
+<div class="flex items-center gap-4">
+<span class="font-label-caps text-[10px] text-on-surface-variant">▌ NORMAL │ profile</span>
+</div>
+<div class="flex items-center gap-4">
+<button class="flex items-center gap-1 group">
+<span class="font-label-caps text-[10px] text-on-surface-variant group-hover:text-primary">[ESC] back</span>
+</button>
+</div>
+</nav>
+<!-- Decorative CRT Scanline overlay line -->
+<div class="fixed top-0 left-0 w-full h-[1px] bg-primary opacity-20 pointer-events-none animate-pulse"></div>
+</body></html>

docs/ui-mockups/radial-menu-mobile.html

@@ -0,0 +1,271 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;700&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "surface-variant": "#313538",
+                        "surface-dim": "#101417",
+                        "secondary-fixed-dim": "#bad073",
+                        "surface-bright": "#363a3d",
+                        "secondary-fixed": "#d5ec8c",
+                        "secondary-container": "#435401",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "surface-container-highest": "#313538",
+                        "outline-variant": "#3f484e",
+                        "error": "#fb9fb1",
+                        "surface-container": "#202020",
+                        "inverse-on-surface": "#2d3134",
+                        "on-primary-fixed-variant": "#004c69",
+                        "outline": "#505050",
+                        "on-secondary": "#293500",
+                        "suit-red": "#fb9fb1",
+                        "inverse-primary": "#00668a",
+                        "on-secondary-container": "#b2c86d",
+                        "highlight-celebration": "#e1a3ee",
+                        "warning": "#ddb26f",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "info": "#12cfc0",
+                        "primary-fixed": "#c4e7ff",
+                        "highlight-valid": "#acc267",
+                        "on-surface-variant": "#bfc8cf",
+                        "on-tertiary": "#4c195b",
+                        "background": "#101417",
+                        "tertiary-container": "#e1a3ee",
+                        "suit-black": "#d0d0d0",
+                        "on-error-container": "#ffdad6",
+                        "on-surface": "#d0d0d0",
+                        "primary": "#a1dcff",
+                        "error-container": "#93000a",
+                        "secondary": "#bad073",
+                        "surface": "#151515",
+                        "primary-container": "#6fc2ef",
+                        "suit-red-cb": "#6fc2ef",
+                        "on-primary": "#003549",
+                        "surface-container-low": "#181c1f",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "surface-tint": "#7ed0fe",
+                        "on-tertiary-container": "#683476",
+                        "on-secondary-fixed": "#161e00",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-tertiary-fixed": "#340043",
+                        "surface-container-high": "#272a2d",
+                        "on-error": "#690005",
+                        "tertiary-fixed": "#fbd7ff",
+                        "tertiary": "#f7c3ff",
+                        "on-background": "#e0e3e6",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-primary-fixed": "#001e2c",
+                        "on-primary-container": "#004f6c",
+                        "inverse-surface": "#e0e3e6"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "action-bar-height": "64px",
+                        "stack-overlap": "2rem",
+                        "gutter-card": "0.375rem",
+                        "touch-target-min": "48dp",
+                        "margin-edge": "1rem"
+                    },
+                    "fontFamily": {
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "headline": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .radial-segment {
+            clip-path: polygon(50% 50%, 100% 0, 100% 100%);
+        }
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+            display: inline-block;
+            vertical-align: middle;
+        }
+        .scanline-bg {
+            background: repeating-linear-gradient(
+                0deg,
+                rgba(26, 26, 26, 1) 0px,
+                rgba(26, 26, 26, 1) 2px,
+                rgba(21, 21, 21, 1) 2px,
+                rgba(21, 21, 21, 1) 4px
+            );
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface font-body-md text-on-surface select-none overflow-hidden h-screen w-screen flex flex-col">
+<!-- Underlying Game Tableau (Dimmed Background) -->
+<main class="relative flex-grow opacity-30 grid grid-cols-7 gap-2 p-margin-edge pointer-events-none">
+<!-- Top row: Foundation/Stock -->
+<div class="col-span-1 aspect-[2/3] border border-dashed border-outline-variant bg-surface-container flex items-center justify-center">
+<span class="material-symbols-outlined text-outline-variant">terminal</span>
+</div>
+<div class="col-span-1 aspect-[2/3] border border-dashed border-outline-variant"></div>
+<div class="col-span-1"></div>
+<div class="col-span-1 aspect-[2/3] border border-outline border-suit-red-cb flex items-center justify-center">
+<span class="material-symbols-outlined text-suit-red-cb">favorite</span>
+</div>
+<div class="col-span-1 aspect-[2/3] border border-outline border-suit-black flex items-center justify-center">
+<span class="material-symbols-outlined text-suit-black">backspace</span>
+</div>
+<div class="col-span-1 aspect-[2/3] border border-outline border-suit-red-cb flex items-center justify-center">
+<span class="material-symbols-outlined text-suit-red-cb">diamond</span>
+</div>
+<div class="col-span-1 aspect-[2/3] border border-outline border-suit-black flex items-center justify-center">
+<span class="material-symbols-outlined text-suit-black">spa</span>
+</div>
+<!-- Tableau piles -->
+<div class="col-span-7 grid grid-cols-7 gap-2 mt-4">
+<div class="space-y-[-120%]">
+<div class="aspect-[2/3] bg-surface-container-high border border-outline p-1 flex flex-col justify-between">
+<span class="font-card-rank text-card-rank text-suit-red-cb">K</span>
+<span class="material-symbols-outlined self-end text-3xl rotate-180 text-suit-red-cb">diamond</span>
+</div>
+</div>
+<div class="space-y-[-120%]">
+<div class="aspect-[2/3] scanline-bg border border-outline relative">
+<div class="absolute top-1 left-1 w-3 h-4 bg-primary"></div>
+<span class="absolute bottom-1 right-1 font-label-caps text-[10px] text-primary">▌RS</span>
+</div>
+<div class="aspect-[2/3] bg-surface-container-high border border-outline p-1 flex flex-col justify-between">
+<span class="font-card-rank text-card-rank text-suit-black">Q</span>
+<span class="material-symbols-outlined self-end text-3xl rotate-180 text-suit-black" style="font-variation-settings: 'FILL' 1;">spa</span>
+</div>
+</div>
+<div class="space-y-[-120%]">
+<div class="aspect-[2/3] scanline-bg border border-outline"></div>
+<div class="aspect-[2/3] scanline-bg border border-outline"></div>
+<div class="aspect-[2/3] bg-surface-container-high border border-outline p-1 flex flex-col justify-between">
+<span class="font-card-rank text-card-rank text-suit-red-cb">J</span>
+<span class="material-symbols-outlined self-end text-3xl rotate-180 text-suit-red-cb" style="font-variation-settings: 'FILL' 1;">favorite</span>
+</div>
+</div>
+<!-- More stacks... omitted for brevity as background -->
+</div>
+</main>
+<!-- Radial Menu Overlay -->
+<div class="fixed inset-0 z-50 bg-[#151515]/70 flex items-center justify-center overflow-hidden">
+<div class="relative w-[280px] h-[280px] flex items-center justify-center">
+<!-- Outer Circular Ring Shell -->
+<div class="absolute inset-0 rounded-full border border-outline bg-surface-container overflow-hidden">
+<!-- SVG Segments Construction -->
+<svg class="w-full h-full transform -rotate-22.5" viewbox="0 0 100 100">
+<!-- Slice 1 (UNDO) - Top / 12:00 -->
+<!-- Active state: bg-primary-container/15, stroke-primary -->
+<path d="M 50 50 L 50 0 A 50 50 0 0 1 85.35 14.65 Z" fill="#6fc2ef26" stroke="#6fc2ef" stroke-width="0.5" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 2 (REDO) -->
+<path d="M 50 50 L 85.35 14.65 A 50 50 0 0 1 100 50 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 3 (HINT) -->
+<path d="M 50 50 L 100 50 A 50 50 0 0 1 85.35 85.35 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 4 (AUTO) -->
+<path d="M 50 50 L 85.35 85.35 A 50 50 0 0 1 50 100 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 5 (NEW) -->
+<path d="M 50 50 L 50 100 A 50 50 0 0 1 14.65 85.35 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 6 (PAUSE) -->
+<path d="M 50 50 L 14.65 85.35 A 50 50 0 0 1 0 50 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 7 (STATS) -->
+<path d="M 50 50 L 0 50 A 50 50 0 0 1 14.65 14.65 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+<!-- Slice 8 (SETTINGS) -->
+<path d="M 50 50 L 14.65 14.65 A 50 50 0 0 1 50 0 Z" fill="transparent" stroke="#353535" stroke-width="0.25" transform="rotate(-22.5, 50, 50)"></path>
+</svg>
+</div>
+<!-- Labels and Icons Overlay -->
+<div class="absolute inset-0 pointer-events-none">
+<!-- 12:00 UNDO (ACTIVE) -->
+<div class="absolute top-[12%] left-1/2 -translate-x-1/2 flex flex-col items-center text-primary">
+<span class="material-symbols-outlined text-[24px]" data-icon="undo">undo</span>
+<span class="font-label-caps text-[11px] mt-1">UNDO</span>
+</div>
+<!-- 1:30 REDO -->
+<div class="absolute top-[22%] right-[12%] flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="redo">redo</span>
+<span class="font-label-caps text-[11px] mt-1">REDO</span>
+</div>
+<!-- 3:00 HINT -->
+<div class="absolute top-1/2 right-[8%] -translate-y-1/2 flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="lightbulb">lightbulb</span>
+<span class="font-label-caps text-[11px] mt-1">HINT</span>
+</div>
+<!-- 4:30 AUTO -->
+<div class="absolute bottom-[22%] right-[12%] flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="double_arrow">double_arrow</span>
+<span class="font-label-caps text-[11px] mt-1">AUTO</span>
+</div>
+<!-- 6:00 NEW -->
+<div class="absolute bottom-[12%] left-1/2 -translate-x-1/2 flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="add">add</span>
+<span class="font-label-caps text-[11px] mt-1">NEW</span>
+</div>
+<!-- 7:30 PAUSE -->
+<div class="absolute bottom-[22%] left-[12%] flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="pause">pause</span>
+<span class="font-label-caps text-[11px] mt-1">PAUSE</span>
+</div>
+<!-- 9:00 STATS -->
+<div class="absolute top-1/2 left-[8%] -translate-y-1/2 flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="bar_chart">bar_chart</span>
+<span class="font-label-caps text-[11px] mt-1">STATS</span>
+</div>
+<!-- 10:30 SETTINGS -->
+<div class="absolute top-[22%] left-[12%] flex flex-col items-center text-on-surface">
+<span class="material-symbols-outlined text-[24px]" data-icon="settings">settings</span>
+<span class="font-label-caps text-[11px] mt-1">SETTINGS</span>
+</div>
+</div>
+<!-- Inner Hole -->
+<div class="absolute w-20 h-20 rounded-full bg-surface-container border border-outline-variant flex flex-col items-center justify-center z-10">
+<div class="font-headline text-[32px] text-primary leading-none">▌</div>
+<div class="font-label-caps text-[10px] text-on-surface-variant tracking-widest mt-1">RADIAL</div>
+</div>
+</div>
+<!-- Instructions (Bottom Floating) -->
+<div class="absolute bottom-12 left-0 w-full flex flex-col items-center gap-4">
+<div class="font-label-caps text-[12px] text-on-surface-variant tracking-wider">
+                DRAG TO SELECT · RELEASE TO ACTIVATE
+            </div>
+<!-- Status Line (Vim style) -->
+<div class="w-full h-8 bg-surface-container border-t border-outline-variant flex items-center justify-center">
+<span class="font-label-caps text-[11px] text-on-surface-variant">
+<span class="text-primary">▌</span> NORMAL │ radial · 1/8 selected
+                </span>
+</div>
+</div>
+</div>
+<!-- Hidden image for standard requirement compliance, though not visually used in this specific overlay task -->
+<div class="hidden">
+<img data-alt="A macro shot of a vintage terminal screen displaying green computer code and technical data. The lighting is low-key, with a soft glow emanating from the screen, highlighting the CRT scanlines and subtle reflections. The aesthetic is purely technical and retro-futuristic, focusing on precision and high-contrast digital artifacts. Deep blacks and vibrant green neon tones dominate the color palette, evoking a high-performance system environment." src="https://lh3.googleusercontent.com/aida-public/AB6AXuAQuJUCOQev_BN72KyX0c-ylmW3DMZD-gOUlylYo3w1SrSpGnvorMvSUwe5oGPAgBgc050cCowC8f1QaxHEDN-DUkyCynOLhzrZHXyCJh2ebCWd6x1quLQwp0ffwbHsZW1-J2zAMuUydMNpEVmpHFQDij0yjVg6lxc6JdsC0etMoAWMhb61S3HUoDffSl-Q23N8Oc77r3dSf6kLFKAMAJCbXFz4nTaJKCKAwtMs62pLr6fd1jzMZrItH43RaO28uzMzvnGGZj3Miw"/>
+</div>
+</body></html>

docs/ui-mockups/replay-overlay-mobile.html

@@ -0,0 +1,284 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Solitaire Replay Overlay</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "on-background": "#e0e3e6",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-container": "#202020",
+                        "primary": "#a1dcff",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "surface-tint": "#7ed0fe",
+                        "outline": "#505050",
+                        "suit-black": "#d0d0d0",
+                        "secondary": "#bad073",
+                        "on-surface": "#d0d0d0",
+                        "on-primary": "#003549",
+                        "on-error-container": "#ffdad6",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "surface-bright": "#363a3d",
+                        "surface-variant": "#313538",
+                        "secondary-container": "#435401",
+                        "surface-container-highest": "#313538",
+                        "surface-container-low": "#181c1f",
+                        "primary-container": "#6fc2ef",
+                        "on-error": "#690005",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "tertiary-container": "#e1a3ee",
+                        "on-tertiary-container": "#683476",
+                        "suit-red": "#fb9fb1",
+                        "highlight-celebration": "#e1a3ee",
+                        "on-primary-fixed-variant": "#004c69",
+                        "secondary-fixed": "#d5ec8c",
+                        "primary-fixed": "#c4e7ff",
+                        "on-primary-container": "#004f6c",
+                        "secondary-fixed-dim": "#bad073",
+                        "warning": "#ddb26f",
+                        "on-secondary": "#293500",
+                        "info": "#12cfc0",
+                        "on-tertiary-fixed": "#340043",
+                        "background": "#101417",
+                        "surface-container-high": "#272a2d",
+                        "surface-dim": "#101417",
+                        "surface": "#151515",
+                        "inverse-surface": "#e0e3e6",
+                        "on-surface-variant": "#bfc8cf",
+                        "error-container": "#93000a",
+                        "tertiary": "#f7c3ff",
+                        "inverse-primary": "#00668a",
+                        "surface-container-lowest": "#0b0f11",
+                        "inverse-on-surface": "#2d3134",
+                        "on-primary-fixed": "#001e2c",
+                        "highlight-valid": "#acc267",
+                        "outline-variant": "#3f484e",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-secondary-fixed": "#161e00",
+                        "error": "#fb9fb1",
+                        "on-tertiary": "#4c195b",
+                        "on-secondary-container": "#b2c86d"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "touch-target-min": "48dp",
+                        "stack-overlap": "2rem",
+                        "margin-edge": "1rem",
+                        "action-bar-height": "64px",
+                        "gutter-card": "0.375rem"
+                    },
+                    "fontFamily": {
+                        "hud-timer": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .card-back-pattern {
+            background-color: #151515;
+            background-image: repeating-linear-gradient(0deg, transparent, transparent 2px, #1a1a1a 2px, #1a1a1a 4px);
+        }
+        /* Custom mechanical transition style */
+        .mechanical-transition {
+            transition: all 120ms cubic-bezier(0.4, 0, 0.2, 1);
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface text-on-surface font-body-md select-none overflow-hidden flex flex-col h-[844px] w-[390px] mx-auto border-x border-outline-variant">
+<!-- Status Bar -->
+<header class="h-8 bg-surface-container flex items-center justify-between px-4 border-b border-outline-variant flex-shrink-0">
+<div class="flex items-center gap-2">
+<span class="text-primary font-headline text-[14px]">▌replay.tsx</span>
+</div>
+<div class="flex items-center text-on-surface-variant font-label-caps text-[10px] tracking-wider uppercase">
+            GAME #2024-127 · 87 MOVES
+        </div>
+</header>
+<!-- Game Peek Band (Tableau) -->
+<main class="h-[240px] relative bg-background overflow-hidden border-b border-outline-variant">
+<!-- 7-Column Tableau (Dimmed 50%) -->
+<div class="absolute inset-0 opacity-50 flex justify-around p-2 gap-1">
+<!-- Tableau Columns 1-7 -->
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] border border-dashed border-outline-variant mb-1"></div>
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline"></div>
+</div>
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline"></div>
+</div>
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline"></div>
+</div>
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline"></div>
+</div>
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline"></div>
+</div>
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline"></div>
+</div>
+<div class="flex-1 flex flex-col items-center">
+<div class="w-full aspect-[2/3] bg-surface-container-low border border-outline relative">
+<!-- Central Focused Card (Move 47) -->
+<div class="absolute inset-0 z-20 opacity-100">
+<!-- Shadow-less highlight using glow outline -->
+<div class="w-full h-full bg-[#1a1a1a] border border-suit-red-cb ring-2 ring-suit-red-cb/40 flex flex-col justify-between p-1">
+<div class="flex flex-col">
+<span class="font-card-rank text-card-rank text-suit-red-cb">4</span>
+<span class="material-symbols-outlined text-[14px] text-suit-red-cb" data-icon="diamond">diamond</span>
+</div>
+<div class="self-end rotate-180 flex flex-col">
+<span class="font-card-rank text-card-rank text-suit-red-cb">4</span>
+<span class="material-symbols-outlined text-[14px] text-suit-red-cb" data-icon="diamond">diamond</span>
+</div>
+</div>
+<!-- Move Chip -->
+<div class="absolute -top-6 left-1/2 -translate-x-1/2 bg-suit-red-cb px-2 py-0.5 rounded-sm">
+<span class="text-surface font-label-caps text-[9px] font-bold">MOVE 47/87</span>
+</div>
+</div>
+</div>
+</div>
+</div>
+</main>
+<!-- Playback Toolbar -->
+<div class="h-16 bg-surface-container flex items-center justify-between px-4 border-b border-outline-variant">
+<!-- Left: Timer -->
+<div class="flex flex-col">
+<span class="text-on-surface font-hud-timer text-[18px] font-bold leading-none">00:42</span>
+<span class="text-[11px] text-[#a0a0a0] font-label-caps tracking-tighter">/ 02:18</span>
+</div>
+<!-- Center: Controls -->
+<div class="flex items-center gap-4">
+<button class="material-symbols-outlined text-on-surface-variant hover:text-primary mechanical-transition" data-icon="skip_previous">skip_previous</button>
+<button class="material-symbols-outlined text-on-surface-variant hover:text-primary mechanical-transition" data-icon="arrow_left">arrow_left</button>
+<button class="material-symbols-outlined text-suit-red-cb text-[32px] mechanical-transition" data-icon="play_arrow">play_arrow</button>
+<button class="material-symbols-outlined text-on-surface-variant hover:text-primary mechanical-transition" data-icon="arrow_right">arrow_right</button>
+<button class="material-symbols-outlined text-on-surface-variant hover:text-primary mechanical-transition" data-icon="skip_next">skip_next</button>
+</div>
+<!-- Right: Speed -->
+<div class="flex items-center bg-surface-variant border border-outline px-2 py-1 gap-1">
+<span class="font-label-caps text-[14px] font-bold text-on-surface">1.0x</span>
+<span class="material-symbols-outlined text-[16px] text-on-surface-variant" data-icon="unfold_more">unfold_more</span>
+</div>
+</div>
+<!-- Scrub Bar Area -->
+<div class="px-margin-edge pt-6 pb-8 bg-surface-container-low border-b border-outline-variant">
+<div class="relative w-full h-1 bg-outline rounded-full">
+<!-- Cyan Progress Track -->
+<div class="absolute left-0 top-0 h-full bg-suit-red-cb" style="width: 54%;"></div>
+<!-- Notches & Labels -->
+<div class="absolute inset-0 flex justify-between">
+<div class="relative">
+<div class="w-[1px] h-3 bg-outline -mt-1"></div>
+<span class="absolute -bottom-5 left-1/2 -translate-x-1/2 text-[9px] font-label-caps text-outline">0%</span>
+</div>
+<div class="relative">
+<div class="w-[1px] h-3 bg-outline -mt-1"></div>
+<span class="absolute -bottom-5 left-1/2 -translate-x-1/2 text-[9px] font-label-caps text-outline">25%</span>
+</div>
+<div class="relative">
+<div class="w-[1px] h-3 bg-outline -mt-1"></div>
+<span class="absolute -bottom-5 left-1/2 -translate-x-1/2 text-[9px] font-label-caps text-outline">50%</span>
+</div>
+<div class="relative">
+<div class="w-[1px] h-3 bg-outline -mt-1"></div>
+<span class="absolute -bottom-5 left-1/2 -translate-x-1/2 text-[9px] font-label-caps text-outline">75%</span>
+</div>
+<div class="relative">
+<div class="w-[1px] h-3 bg-outline -mt-1"></div>
+<span class="absolute -bottom-5 left-1/2 -translate-x-1/2 text-[9px] font-label-caps text-outline">100%</span>
+</div>
+</div>
+<!-- Current Marker (54%) -->
+<div class="absolute top-1/2 -translate-y-1/2 w-3 h-3 bg-suit-red-cb border border-surface" style="left: 54%;"></div>
+<div class="absolute -top-4 left-[54%] -translate-x-1/2 text-[10px] text-suit-red-cb font-label-caps font-bold">47/87</div>
+<!-- Win Marker (72%) -->
+<div class="absolute top-0 w-[2px] h-3 bg-highlight-valid -translate-y-1" style="left: 72%;"></div>
+<div class="absolute -bottom-5 left-[72%] -translate-x-1/2 text-[8px] text-highlight-valid font-label-caps font-bold whitespace-nowrap">WIN MOVE</div>
+</div>
+</div>
+<!-- Move Log Card -->
+<section class="flex-1 bg-surface-container p-4 overflow-y-auto">
+<h3 class="font-label-caps text-label-caps text-on-surface-variant mb-4 flex items-center gap-2">
+<span class="w-1.5 h-3 bg-primary block"></span>
+            MOVE LOG · 47/87
+        </h3>
+<div class="flex flex-col font-label-caps text-[12px]">
+<!-- Log Rows -->
+<div class="flex items-center h-6 px-2 text-[#a0a0a0] border-b border-outline-variant/30">
+<span class="w-8">44 |</span>
+<span>5♥ → tableau col 3</span>
+</div>
+<div class="flex items-center h-6 px-2 text-[#a0a0a0] border-b border-outline-variant/30">
+<span class="w-8">45 |</span>
+<span>8♣ → tableau col 1</span>
+</div>
+<div class="flex items-center h-6 px-2 text-[#a0a0a0] border-b border-outline-variant/30">
+<span class="w-8">46 |</span>
+<span>stock cycle</span>
+</div>
+<!-- Highlighted Active Move -->
+<div class="flex items-center h-6 px-2 bg-suit-red-cb text-surface-container font-bold">
+<span class="w-8">▶ 47 |</span>
+<span>4♦ → 5♣ on col 7</span>
+</div>
+<div class="flex items-center h-6 px-2 text-on-surface border-b border-outline-variant/30">
+<span class="w-8">48 |</span>
+<span class="material-symbols-outlined text-[14px] align-middle mr-1" data-icon="foundation">foundation</span> A♠ → foundation
+            </div>
+<div class="flex items-center h-6 px-2 text-on-surface border-b border-outline-variant/30">
+<span class="w-8">49 |</span>
+<span class="material-symbols-outlined text-[14px] align-middle mr-1" data-icon="foundation">foundation</span> 2♠ → foundation
+            </div>
+</div>
+</section>
+<!-- Footer -->
+<footer class="h-6 bg-surface-container flex items-center justify-between px-4 border-t border-outline-variant flex-shrink-0 text-[10px] font-label-caps tracking-wider">
+<div class="text-on-surface-variant">
+<span class="text-primary">▌</span> NORMAL │ replay
+        </div>
+<div class="text-on-surface-variant opacity-70">
+            [SPACE] play · [← →] scrub · [ESC]
+        </div>
+</footer>
+<!-- Overlay Background (For visualization of depth) -->
+<div class="fixed inset-0 pointer-events-none border-[16px] border-surface-dim/40 z-50"></div>
+</body></html>

docs/ui-mockups/settings-mobile.html

@@ -0,0 +1,258 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500;700&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "on-secondary": "#293500",
+                        "surface-container": "#1c2023",
+                        "on-primary-fixed": "#001e2c",
+                        "surface-tint": "#7ed0fe",
+                        "suit-black": "#d0d0d0",
+                        "on-background": "#e0e3e6",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-tertiary": "#4c195b",
+                        "on-error": "#690005",
+                        "secondary-fixed-dim": "#bad073",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "suit-red-cb": "#6fc2ef",
+                        "on-primary-container": "#004f6c",
+                        "on-error-container": "#ffdad6",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-surface": "#e0e3e6",
+                        "secondary-container": "#435401",
+                        "inverse-on-surface": "#2d3134",
+                        "suit-red": "#fb9fb1",
+                        "tertiary": "#f7c3ff",
+                        "surface-dim": "#101417",
+                        "background": "#101417",
+                        "error": "#fb9fb1",
+                        "on-secondary-container": "#b2c86d",
+                        "on-primary": "#003549",
+                        "on-tertiary-container": "#683476",
+                        "surface-container-low": "#181c1f",
+                        "warning": "#ddb26f",
+                        "surface-variant": "#313538",
+                        "primary-fixed": "#c4e7ff",
+                        "primary": "#a1dcff",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "surface": "#151515",
+                        "secondary": "#bad073",
+                        "outline-variant": "#3f484e",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "highlight-valid": "#acc267",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "surface-bright": "#363a3d",
+                        "secondary-fixed": "#d5ec8c",
+                        "primary-container": "#6fc2ef",
+                        "surface-container-highest": "#313538",
+                        "on-secondary-fixed": "#161e00",
+                        "surface-container-high": "#272a2d",
+                        "inverse-primary": "#00668a",
+                        "on-tertiary-fixed": "#340043",
+                        "tertiary-container": "#e1a3ee",
+                        "on-surface-variant": "#bfc8cf",
+                        "highlight-celebration": "#e1a3ee",
+                        "inverse-surface": "#e0e3e6",
+                        "outline": "#505050",
+                        "info": "#12cfc0",
+                        "on-primary-fixed-variant": "#004c69",
+                        "error-container": "#93000a"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "gutter-card": "0.375rem",
+                        "stack-overlap": "2rem",
+                        "margin-edge": "1rem",
+                        "touch-target-min": "48dp",
+                        "action-bar-height": "64px",
+                        "top-action-bar-height": "32px",
+                        "bottom-action-bar-height": "24px"
+                    },
+                    "fontFamily": {
+                        "body-md": ["Inter"],
+                        "label-caps": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+            display: inline-block;
+            line-height: 1;
+            text-transform: none;
+            letter-spacing: normal;
+            word-wrap: normal;
+            white-space: nowrap;
+            direction: ltr;
+        }
+        .card-back-pattern {
+            background: repeating-linear-gradient(
+                0deg,
+                #151515,
+                #151515 2px,
+                #1a1a1a 2px,
+                #1a1a1a 4px
+            );
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-background font-body-md selection:bg-primary selection:text-on-primary-container overflow-hidden flex flex-col h-[844px] w-[390px] mx-auto border-x border-outline-variant">
+<!-- Status Bar / TopAppBar Logic -->
+<header class="bg-[#202020] h-8 flex items-center justify-between px-4 w-full z-50">
+<div class="flex items-center gap-1">
+<span class="text-primary font-headline text-[12px]">▌</span>
+<span class="text-on-surface font-label-caps text-[12px]">settings.toml</span>
+</div>
+<div class="text-outline font-label-caps text-[12px]">v0.20.0</div>
+</header>
+<!-- NavigationDrawer (Tab Strip Mapping) -->
+<nav class="bg-[#1a1a1a] h-10 border-b border-[#353535] flex items-center w-full">
+<!-- COSMETIC Tab (Active) -->
+<div class="h-full flex-1 flex flex-col items-center justify-center relative">
+<span class="text-primary font-label-caps text-[12px] px-2">[ COSMETIC ]</span>
+<div class="absolute bottom-0 left-0 right-0 h-[2px] bg-primary"></div>
+</div>
+<!-- GAMEPLAY Tab -->
+<div class="h-full flex-1 flex items-center justify-center">
+<span class="text-[#a0a0a0] font-label-caps text-[12px]">GAMEPLAY</span>
+</div>
+<!-- SYNC Tab -->
+<div class="h-full flex-1 flex items-center justify-center">
+<span class="text-[#a0a0a0] font-label-caps text-[12px]">SYNC</span>
+</div>
+<!-- AUDIO Tab -->
+<div class="h-full flex-1 flex items-center justify-center">
+<span class="text-[#a0a0a0] font-label-caps text-[12px]">AUDIO</span>
+</div>
+</nav>
+<!-- Content Area (Canvas) -->
+<main class="flex-1 bg-[#151515] p-margin-edge overflow-y-auto space-y-2">
+<!-- row: card_theme -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">card_theme</span>
+<span class="text-suit-black font-label-caps text-[14px]">Terminal</span>
+</div>
+<span class="text-primary material-symbols-outlined" data-icon="arrow_forward">arrow_forward</span>
+</div>
+<!-- row: background -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">background</span>
+<span class="text-suit-black font-label-caps text-[14px]">Solid #151515</span>
+</div>
+<span class="text-primary material-symbols-outlined" data-icon="arrow_forward">arrow_forward</span>
+</div>
+<!-- row: card_back -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">card_back</span>
+<span class="text-suit-black font-label-caps text-[14px]">Terminal</span>
+</div>
+<div class="flex items-center gap-3">
+<div class="w-4 h-6 border border-outline card-back-pattern relative overflow-hidden">
+<div class="absolute top-0.5 left-0.5 w-1.5 h-2 bg-primary"></div>
+</div>
+<span class="text-primary material-symbols-outlined" data-icon="arrow_forward">arrow_forward</span>
+</div>
+</div>
+<!-- row: color_blind_mode -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">color_blind_mode</span>
+<span class="text-suit-black font-label-caps text-[14px]">false</span>
+</div>
+<!-- Toggle OFF -->
+<div class="w-10 h-5 bg-[#202020] border border-outline rounded-full relative">
+<div class="absolute left-0.5 top-0.5 w-3.5 h-3.5 bg-outline rounded-full"></div>
+</div>
+</div>
+<!-- row: high_contrast -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">high_contrast</span>
+<span class="text-suit-black font-label-caps text-[14px]">false</span>
+</div>
+<!-- Toggle OFF -->
+<div class="w-10 h-5 bg-[#202020] border border-outline rounded-full relative">
+<div class="absolute left-0.5 top-0.5 w-3.5 h-3.5 bg-outline rounded-full"></div>
+</div>
+</div>
+<!-- row: reduce_motion -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">reduce_motion</span>
+<span class="text-suit-black font-label-caps text-[14px]">true</span>
+</div>
+<!-- Toggle ON -->
+<div class="w-10 h-5 bg-[#1f3a4a] border border-primary/50 rounded-full relative">
+<div class="absolute right-0.5 top-0.5 w-3.5 h-3.5 bg-primary-container rounded-full"></div>
+</div>
+</div>
+<!-- row: crt_scanline_effect -->
+<div class="bg-[#202020] h-14 rounded-[4px] px-3 flex items-center justify-between">
+<div class="flex flex-col">
+<span class="text-[#a0a0a0] font-label-caps text-[11px]">crt_scanline_effect</span>
+<span class="text-suit-black font-label-caps text-[14px]">false</span>
+</div>
+<!-- Toggle OFF -->
+<div class="w-10 h-5 bg-[#202020] border border-outline rounded-full relative">
+<div class="absolute left-0.5 top-0.5 w-3.5 h-3.5 bg-outline rounded-full"></div>
+</div>
+</div>
+</main>
+<!-- BottomNavBar (Footer Logic) -->
+<footer class="h-6 bg-[#202020] border-t border-[#353535] flex items-center justify-between px-4 w-full z-50">
+<div class="flex items-center gap-1 font-label-caps text-[11px]">
+<span class="text-primary">▌</span>
+<span class="text-suit-black">NORMAL</span>
+<span class="text-outline">│</span>
+<span class="text-on-surface">settings</span>
+</div>
+<div class="flex items-center gap-2 font-label-caps text-[11px]">
+<div class="flex items-center">
+<span class="text-[#a0a0a0]">[1-4]</span>
+<span class="text-outline ml-1">tab</span>
+</div>
+<span class="text-outline">·</span>
+<div class="flex items-center">
+<span class="text-[#a0a0a0]">[ESC]</span>
+<span class="text-outline ml-1">back</span>
+</div>
+</div>
+</footer>
+</body></html>

docs/ui-mockups/splash-mobile.html

@@ -0,0 +1,213 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Terminal Edition</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500;700&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "primary-fixed": "#c4e7ff",
+                        "on-tertiary-fixed": "#340043",
+                        "surface-dim": "#101417",
+                        "on-error": "#690005",
+                        "inverse-primary": "#00668a",
+                        "highlight-celebration": "#e1a3ee",
+                        "surface-variant": "#313538",
+                        "on-background": "#e0e3e6",
+                        "secondary-fixed": "#d5ec8c",
+                        "surface-bright": "#363a3d",
+                        "on-primary-container": "#004f6c",
+                        "on-surface": "#d0d0d0",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-tertiary-container": "#683476",
+                        "surface-container-high": "#272a2d",
+                        "error": "#fb9fb1",
+                        "highlight-valid": "#acc267",
+                        "primary-container": "#6fc2ef",
+                        "on-secondary": "#293500",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "on-primary-fixed": "#001e2c",
+                        "outline-variant": "#3f484e",
+                        "secondary-container": "#435401",
+                        "background": "#101417",
+                        "on-primary-fixed-variant": "#004c69",
+                        "suit-black": "#d0d0d0",
+                        "surface-container": "#1c2023",
+                        "on-primary": "#003549",
+                        "primary": "#a1dcff",
+                        "error-container": "#93000a",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "info": "#12cfc0",
+                        "warning": "#ddb26f",
+                        "tertiary-container": "#e1a3ee",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-tertiary": "#4c195b",
+                        "surface": "#151515",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "surface-container-highest": "#313538",
+                        "inverse-on-surface": "#2d3134",
+                        "suit-red": "#fb9fb1",
+                        "surface-container-low": "#181c1f",
+                        "on-secondary-container": "#b2c86d",
+                        "on-error-container": "#ffdad6",
+                        "tertiary": "#f7c3ff",
+                        "suit-red-cb": "#6fc2ef",
+                        "inverse-surface": "#e0e3e6",
+                        "surface-tint": "#7ed0fe",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "outline": "#505050",
+                        "on-surface-variant": "#bfc8cf",
+                        "secondary": "#bad073",
+                        "on-secondary-fixed": "#161e00",
+                        "boot-cyan": "#a1dcff",
+                        "boot-lime": "#acc267"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "stack-overlap": "2rem",
+                        "action-bar-height": "64px",
+                        "margin-edge": "1rem",
+                        "gutter-card": "0.375rem"
+                    },
+                    "fontFamily": {
+                        "hud-timer": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "card-rank": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        body {
+            background-color: #151515;
+            color: #d0d0d0;
+            margin: 0;
+            padding: 0;
+            height: 100vh;
+            overflow: hidden;
+            -webkit-font-smoothing: antialiased;
+        }
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .cyan-halo {
+            box-shadow: 0 0 40px 4px rgba(161, 220, 255, 0.15);
+        }
+        .scanlines {
+            background: linear-gradient(to bottom, rgba(21, 21, 21, 0) 50%, rgba(0, 0, 0, 0.2) 50%);
+            background-size: 100% 4px;
+            pointer-events: none;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="flex flex-col items-center justify-between font-body-md w-[390px] h-[844px] mx-auto relative overflow-hidden">
+<div class="absolute inset-0 scanlines opacity-30 z-10"></div>
+<!-- Top Safe Area (Blank) -->
+<div class="h-10 w-full"></div>
+<!-- Main Content Stack -->
+<main class="flex-1 w-full flex flex-col items-center z-20">
+<!-- Header Section (~30% Top) -->
+<div class="mt-[10%] flex flex-col items-center">
+<div class="w-24 h-24 flex items-center justify-center relative mb-4">
+<div class="text-[96px] text-boot-cyan font-headline cyan-halo leading-none">▌</div>
+</div>
+<div class="flex flex-col items-center">
+<h1 class="font-headline text-[32px] font-bold text-on-surface tracking-tight mb-1">RUSTY SOLITAIRE</h1>
+<div class="w-48 h-[1px] bg-outline-variant"></div>
+<span class="font-label-caps text-[12px] text-outline mt-2 tracking-[0.1em] uppercase">TERMINAL EDITION</span>
+</div>
+</div>
+<!-- Terminal Boot Log (~60% Top Position) -->
+<div class="mt-48 w-[70%] flex flex-col items-start font-hud-timer text-[11px] space-y-1">
+<div class="flex items-center gap-2">
+<span class="text-boot-lime">✓</span>
+<span class="text-outline">assets loaded</span>
+</div>
+<div class="flex items-center gap-2">
+<span class="text-boot-lime">✓</span>
+<span class="text-outline">theme: terminal</span>
+</div>
+<div class="flex items-center gap-2">
+<span class="text-boot-lime">✓</span>
+<span class="text-outline">progress restored</span>
+</div>
+<div class="flex items-center gap-1 mt-1">
+<span class="text-on-surface-variant">▌ ready_</span>
+<span class="w-[6px] h-3 bg-boot-cyan animate-pulse"></span>
+</div>
+</div>
+<!-- Progress Bar (~75% Top Position) -->
+<div class="mt-20 w-full px-8">
+<div class="w-full h-[1px] bg-surface-container-highest relative">
+<div class="absolute top-0 left-0 h-full bg-boot-cyan w-full"></div>
+</div>
+<div class="w-full text-right mt-2">
+<span class="font-label-caps text-[10px] text-outline tracking-wider uppercase">DONE · 247 ASSETS</span>
+</div>
+</div>
+</main>
+<!-- Bottom Strip & Footer -->
+<footer class="w-full flex flex-col items-center z-20 pb-10">
+<div class="flex flex-col items-center mb-8">
+<span class="font-label-caps text-[9px] text-outline mb-3 tracking-widest uppercase">BASE16-EIGHTIES</span>
+<div class="flex gap-1.5">
+<div class="w-3 h-3 bg-[#fb9fb1]"></div>
+<div class="w-3 h-3 bg-[#ddb26f]"></div>
+<div class="w-3 h-3 bg-[#acc267]"></div>
+<div class="w-3 h-3 bg-[#12cfc0]"></div>
+<div class="w-3 h-3 bg-[#6fc2ef]"></div>
+<div class="w-3 h-3 bg-[#e1a3ee]"></div>
+<div class="w-3 h-3 bg-[#d0d0d0]"></div>
+<div class="w-3 h-3 bg-[#505050]"></div>
+</div>
+</div>
+<div class="font-hud-timer text-[11px] text-outline">
+            v0.20.0
+        </div>
+</footer>
+<!-- Top App Bar Content (Hidden as per requirement, but following Shared Components Logic) -->
+<div class="hidden">
+<header class="fixed top-0 w-full z-50 flex justify-between items-center px-margin-edge h-action-bar-height border-b border-outline-variant bg-background">
+<div class="font-headline text-headline text-primary uppercase tracking-tighter">ROOT@SOLITAIRE:~</div>
+<div class="flex gap-4 text-primary">
+<span class="material-symbols-outlined">memory</span>
+<span class="material-symbols-outlined">settings_ethernet</span>
+<span class="material-symbols-outlined">wifi_tethering</span>
+</div>
+</header>
+</div>
+<!-- Placeholder for data-alt requirements even if visual images are minimal -->
+<div class="hidden">
+<img data-alt="A cinematic, low-angle digital render of a retro-terminal interface appearing on a high-end mobile display in a dark room. The screen glows with a soft cyan light, illuminating a minimalist layout with sharp, 1px white lines and a large block cursor symbol. The atmosphere is quiet, technical, and high-performance, reflecting a dark-mode synthwave aesthetic with muted grays and vibrant cyan accents. The focus is on the crisp, high-density typography and the mechanical precision of the digital environment." src="https://lh3.googleusercontent.com/aida-public/AB6AXuBeZymuyGd_-VJr-zgC8p08qBLD4pk0WyRtxuIhVT5kY6cc3y_qSkZ-P_EYYwKIliGysN5rDgqbCsXLxksfslVnB4nj4BYktu4d5EAKi1zEQ8t8MId17UzIgKujbGqebDo0FWO51Snqxt9AvrjX_afEsvACaaeAyIfTKgoAB8MBOUnanIre26Y1tNTftn1y9jxKfrXgi9eCYiJn6zoiaRmNmdLwo_s7RenmSlloPdIURVb3KKHKaBZHldPaStbWcyMYNR877R6O_A"/>
+</div>
+</body></html>

docs/ui-mockups/stats-mobile.html

@@ -0,0 +1,279 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500;600&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>
+    .material-symbols-outlined {
+      font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+    }
+    /* CRT Scanline effect overlay */
+    .crt-overlay::before {
+      content: " ";
+      display: block;
+      position: absolute;
+      top: 0;
+      left: 0;
+      bottom: 0;
+      right: 0;
+      background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.02), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.02));
+      z-index: 100;
+      background-size: 100% 2px, 3px 100%;
+      pointer-events: none;
+    }
+  </style>
+<script id="tailwind-config">
+    tailwind.config = {
+      darkMode: "class",
+      theme: {
+        extend: {
+          "colors": {
+            "tertiary": "#f7c3ff",
+            "surface-container": "#202020",
+            "primary-container": "#6fc2ef",
+            "surface": "#151515",
+            "tertiary-fixed": "#fbd7ff",
+            "info": "#12cfc0",
+            "inverse-on-surface": "#2d3134",
+            "suit-red": "#fb9fb1",
+            "secondary-fixed-dim": "#bad073",
+            "on-background": "#e0e3e6",
+            "tertiary-container": "#e1a3ee",
+            "suit-black": "#d0d0d0",
+            "on-primary": "#003549",
+            "secondary-fixed": "#d5ec8c",
+            "tertiary-fixed-dim": "#f0b0fc",
+            "suit-red-cb": "#6fc2ef",
+            "primary": "#a1dcff",
+            "on-primary-container": "#004f6c",
+            "primary-fixed": "#c4e7ff",
+            "on-surface-variant": "#bfc8cf",
+            "surface-tint": "#7ed0fe",
+            "surface-dim": "#101417",
+            "on-tertiary-container": "#683476",
+            "inverse-primary": "#00668a",
+            "background": "#101417",
+            "on-surface": "#d0d0d0",
+            "primary-fixed-dim": "#7ed0fe",
+            "on-error": "#690005",
+            "surface-container-highest": "#313538",
+            "outline-variant": "#3f484e",
+            "inverse-surface": "#e0e3e6",
+            "warning": "#ddb26f",
+            "surface-variant": "#313538",
+            "on-tertiary-fixed": "#340043",
+            "outline": "#505050",
+            "surface-container-lowest": "#0b0f11",
+            "on-secondary-container": "#b2c86d",
+            "surface-container-high": "#272a2d",
+            "secondary": "#bad073",
+            "error": "#fb9fb1",
+            "highlight-valid": "#acc267",
+            "surface-container-low": "#181c1f",
+            "on-secondary": "#293500",
+            "surface-bright": "#363a3d",
+            "on-secondary-fixed": "#161e00",
+            "on-error-container": "#ffdad6",
+            "highlight-celebration": "#e1a3ee",
+            "on-primary-fixed-variant": "#004c69",
+            "on-tertiary": "#4c195b",
+            "on-primary-fixed": "#001e2c",
+            "secondary-container": "#435401",
+            "error-container": "#93000a",
+            "on-tertiary-fixed-variant": "#653173",
+            "on-secondary-fixed-variant": "#3c4d00"
+          },
+          "borderRadius": {
+            "DEFAULT": "0.125rem",
+            "lg": "0.25rem",
+            "xl": "0.5rem",
+            "full": "0.75rem"
+          },
+          "spacing": {
+            "touch-target-min": "48dp",
+            "stack-overlap": "2rem",
+            "margin-edge": "1rem",
+            "action-bar-height": "64px",
+            "gutter-card": "0.375rem"
+          },
+          "fontFamily": {
+            "hud-timer": ["JetBrains Mono"],
+            "headline": ["JetBrains Mono"],
+            "card-rank": ["JetBrains Mono"],
+            "body-md": ["Inter"],
+            "hud-score": ["JetBrains Mono"],
+            "label-caps": ["JetBrains Mono"]
+          },
+          "fontSize": {
+            "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+            "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+            "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+            "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+            "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+            "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}]
+          }
+        },
+      },
+    }
+  </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface text-on-surface font-body-md min-h-screen selection:bg-primary-container selection:text-on-primary-container">
+<!-- Top Navigation Shell -->
+<header class="fixed top-0 w-full bg-background z-50 border-b border-outline flex justify-between items-center px-margin-edge h-action-bar-height">
+<div class="flex items-center gap-2">
+<span class="material-symbols-outlined text-primary" data-icon="terminal">terminal</span>
+<h1 class="font-headline text-headline text-primary uppercase tracking-tighter">STATISTICS.LOG</h1>
+</div>
+<div class="flex items-center">
+<button class="material-symbols-outlined text-on-surface-variant hover:bg-surface-container-highest transition-colors duration-120 p-2 rounded" data-icon="settings_input_component">settings_input_component</button>
+</div>
+</header>
+<main class="pt-action-bar-height pb-[88px] crt-overlay">
+<!-- Status Bar (Emulated Retro Style) -->
+<div class="h-[32px] bg-surface-container flex items-center justify-between px-margin-edge text-[11px] font-hud-timer">
+<span class="text-on-surface">▌stats.log</span>
+<span class="text-on-surface-variant">247 GAMES TRACKED</span>
+</div>
+<!-- Sub-tab Strip -->
+<nav class="h-[40px] bg-[#1a1a1a] border-b border-outline flex items-center px-margin-edge overflow-x-auto whitespace-nowrap scrollbar-hide">
+<div class="flex items-center h-full gap-4">
+<button class="h-full px-1 flex flex-col justify-center font-label-caps text-[11px] text-primary-container border-b-2 border-primary-container">
+          [ OVERVIEW ]
+        </button>
+<button class="h-full px-1 flex flex-col justify-center font-label-caps text-[11px] text-on-surface-variant hover:text-primary transition-colors">
+          DRAW-1
+        </button>
+<button class="h-full px-1 flex flex-col justify-center font-label-caps text-[11px] text-on-surface-variant hover:text-primary transition-colors">
+          DRAW-3
+        </button>
+<button class="h-full px-1 flex flex-col justify-center font-label-caps text-[11px] text-on-surface-variant hover:text-primary transition-colors">
+          DAILY
+        </button>
+</div>
+</nav>
+<!-- Main Content Grid -->
+<section class="p-4 flex flex-col gap-4">
+<!-- Hero Stat Card -->
+<div class="h-24 bg-surface-container border border-outline rounded-lg p-4 flex justify-between items-center">
+<div>
+<span class="font-headline text-[48px] text-on-surface">61%</span>
+</div>
+<div class="text-right">
+<p class="font-label-caps text-[11px] text-on-surface-variant">WIN RATE</p>
+<p class="font-hud-timer text-[13px] text-highlight-valid">▲ +3% vs last 30</p>
+</div>
+</div>
+<!-- 2x2 Grid -->
+<div class="grid grid-cols-2 gap-2">
+<div class="h-[88px] bg-surface-container border border-outline rounded-lg p-3 flex flex-col justify-between">
+<p class="font-label-caps text-[11px] text-on-surface-variant">GAMES</p>
+<p class="font-hud-score text-hud-score">247</p>
+</div>
+<div class="h-[88px] bg-surface-container border border-outline rounded-lg p-3 flex flex-col justify-between">
+<p class="font-label-caps text-[11px] text-on-surface-variant">WINS</p>
+<p class="font-hud-score text-hud-score">151</p>
+</div>
+<div class="h-[88px] bg-surface-container border border-outline rounded-lg p-3 flex flex-col justify-between">
+<p class="font-label-caps text-[11px] text-on-surface-variant">BEST TIME</p>
+<p class="font-hud-score text-hud-score text-primary">01:54</p>
+</div>
+<div class="h-[88px] bg-surface-container border border-outline rounded-lg p-3 flex flex-col justify-between">
+<p class="font-label-caps text-[11px] text-on-surface-variant">STREAK</p>
+<p class="font-hud-score text-hud-score">12</p>
+</div>
+</div>
+<!-- Sparkline Card -->
+<div class="bg-surface-container border border-outline rounded-lg p-4 h-[200px] flex flex-col">
+<p class="font-label-caps text-[11px] text-on-surface-variant mb-4">WIN RATE · LAST 30 DAYS</p>
+<div class="relative flex-1 flex items-end justify-between border-b border-outline pb-1">
+<!-- Y-Axis Labels -->
+<span class="absolute top-0 left-0 text-[9px] font-hud-timer text-outline">100%</span>
+<span class="absolute bottom-1 left-0 text-[9px] font-hud-timer text-outline">0%</span>
+<!-- Pixel Bar Chart -->
+<div class="flex items-end justify-between w-full h-[80%] gap-[2px]">
+<!-- Generated bars with upward trend -->
+<div class="bg-primary-container w-full" style="height: 35%"></div>
+<div class="bg-primary-container w-full" style="height: 30%"></div>
+<div class="bg-primary-container w-full" style="height: 40%"></div>
+<div class="bg-primary-container w-full" style="height: 38%"></div>
+<div class="bg-primary-container w-full" style="height: 45%"></div>
+<div class="bg-primary-container w-full" style="height: 42%"></div>
+<div class="bg-primary-container w-full" style="height: 50%"></div>
+<div class="bg-primary-container w-full" style="height: 48%"></div>
+<div class="bg-primary-container w-full" style="height: 55%"></div>
+<div class="bg-primary-container w-full" style="height: 52%"></div>
+<div class="bg-primary-container w-full" style="height: 58%"></div>
+<div class="bg-primary-container w-full" style="height: 60%"></div>
+<div class="bg-primary-container w-full" style="height: 55%"></div>
+<div class="bg-primary-container w-full" style="height: 62%"></div>
+<div class="bg-primary-container w-full" style="height: 65%"></div>
+<div class="bg-primary-container w-full" style="height: 63%"></div>
+<div class="bg-primary-container w-full" style="height: 68%"></div>
+<div class="bg-primary-container w-full" style="height: 70%"></div>
+<div class="bg-primary-container w-full" style="height: 65%"></div>
+<div class="bg-primary-container w-full" style="height: 72%"></div>
+<div class="bg-primary-container w-full" style="height: 75%"></div>
+<div class="bg-primary-container w-full" style="height: 78%"></div>
+<div class="bg-primary-container w-full" style="height: 74%"></div>
+<div class="bg-primary-container w-full" style="height: 80%"></div>
+<div class="bg-primary-container w-full" style="height: 82%"></div>
+<div class="bg-primary-container w-full" style="height: 85%"></div>
+<div class="bg-primary-container w-full" style="height: 88%"></div>
+<div class="bg-primary-container w-full" style="height: 86%"></div>
+<div class="bg-primary-container w-full" style="height: 90%"></div>
+<div class="bg-primary-container w-full" style="height: 95%"></div>
+</div>
+</div>
+<div class="flex justify-between mt-1">
+<span class="text-[9px] font-hud-timer text-outline uppercase">30d ago</span>
+<span class="text-[9px] font-hud-timer text-outline uppercase">today</span>
+</div>
+</div>
+<!-- Draw-Mode Split Card -->
+<div class="h-20 bg-surface-container border border-outline rounded-lg p-4 flex flex-col justify-between">
+<p class="font-label-caps text-[11px] text-on-surface-variant">DRAW MODE SPLIT</p>
+<div class="h-3 w-full flex rounded-sm overflow-hidden bg-outline">
+<div class="h-full bg-highlight-valid" style="width: 60%"></div>
+<div class="h-full bg-primary-container" style="width: 40%"></div>
+</div>
+<div class="flex justify-between">
+<span class="font-hud-timer text-[11px] text-highlight-valid">DRAW-1 · 60%</span>
+<span class="font-hud-timer text-[11px] text-primary-container">DRAW-3 · 40%</span>
+</div>
+</div>
+</section>
+<!-- Retro Footer Strip -->
+<footer class="h-[24px] px-margin-edge flex items-center justify-between font-hud-timer text-[10px] text-outline mt-2">
+<div>▌ NORMAL │ stats</div>
+<div>[1-4] view</div>
+</footer>
+</main>
+<!-- Bottom Navigation Shell -->
+<nav class="fixed bottom-0 w-full z-50 h-[64px] bg-surface-container border-t border-outline flex justify-around items-center">
+<div class="flex flex-col items-center justify-center text-on-surface-variant pt-1 hover:text-primary transition-colors duration-120">
+<span class="material-symbols-outlined" data-icon="playing_cards">playing_cards</span>
+<span class="font-label-caps text-label-caps">DECK</span>
+</div>
+<!-- ACTIVE TAB: STATS -->
+<div class="flex flex-col items-center justify-center text-primary border-t-2 border-primary pt-1 hover:text-primary transition-colors duration-120">
+<span class="material-symbols-outlined" data-icon="query_stats" style="font-variation-settings: 'FILL' 1;">query_stats</span>
+<span class="font-label-caps text-label-caps">STATS</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant pt-1 hover:text-primary transition-colors duration-120">
+<span class="material-symbols-outlined" data-icon="history_edu">history_edu</span>
+<span class="font-label-caps text-label-caps">LOGS</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant pt-1 hover:text-primary transition-colors duration-120">
+<span class="material-symbols-outlined" data-icon="terminal">terminal</span>
+<span class="font-label-caps text-label-caps">SYS</span>
+</div>
+</nav>
+</body></html>

docs/ui-mockups/sync-mobile.html

@@ -0,0 +1,262 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Sync Progress</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "surface-container-low": "#181c1f",
+                        "highlight-valid": "#acc267",
+                        "on-secondary-container": "#b2c86d",
+                        "on-tertiary": "#4c195b",
+                        "suit-black": "#d0d0d0",
+                        "surface-container": "#1c2023",
+                        "warning": "#ddb26f",
+                        "outline": "#505050",
+                        "error-container": "#93000a",
+                        "on-secondary": "#293500",
+                        "surface-dim": "#101417",
+                        "on-primary-fixed": "#001e2c",
+                        "secondary": "#bad073",
+                        "on-surface": "#e0e3e6",
+                        "primary": "#a1dcff",
+                        "tertiary-fixed": "#fbd7ff",
+                        "on-tertiary-container": "#683476",
+                        "inverse-primary": "#00668a",
+                        "on-surface-variant": "#bfc8cf",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "surface-tint": "#7ed0fe",
+                        "primary-container": "#6fc2ef",
+                        "on-primary-container": "#004f6c",
+                        "secondary-container": "#435401",
+                        "suit-red-cb": "#6fc2ef",
+                        "surface-container-high": "#272a2d",
+                        "on-background": "#e0e3e6",
+                        "on-primary": "#003549",
+                        "highlight-celebration": "#e1a3ee",
+                        "surface": "#151515",
+                        "secondary-fixed": "#d5ec8c",
+                        "on-primary-fixed-variant": "#004c69",
+                        "surface-container-lowest": "#0b0f11",
+                        "suit-red": "#fb9fb1",
+                        "inverse-on-surface": "#2d3134",
+                        "surface-variant": "#313538",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "tertiary-container": "#e1a3ee",
+                        "outline-variant": "#3f484e",
+                        "inverse-surface": "#e0e3e6",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "on-secondary-fixed": "#161e00",
+                        "info": "#12cfc0",
+                        "primary-fixed": "#c4e7ff",
+                        "surface-container-highest": "#313538",
+                        "on-tertiary-fixed": "#340043",
+                        "on-error": "#690005",
+                        "background": "#101417",
+                        "secondary-fixed-dim": "#bad073",
+                        "error": "#fb9fb1",
+                        "tertiary": "#f7c3ff",
+                        "on-error-container": "#ffdad6",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "surface-bright": "#363a3d"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "touch-target-min": "48dp",
+                        "gutter-card": "0.375rem",
+                        "action-bar-height": "64px",
+                        "stack-overlap": "2rem",
+                        "margin-edge": "1rem"
+                    },
+                    "fontFamily": {
+                        "hud-timer": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "body-md": ["Inter"]
+                    },
+                    "fontSize": {
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+            display: inline-block;
+            vertical-align: middle;
+        }
+        .scanline {
+            background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.1) 50%);
+            background-size: 100% 2px;
+            pointer-events: none;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-surface text-on-surface font-body-md min-h-screen flex flex-col overflow-x-hidden selection:bg-primary-container selection:text-on-primary-container">
+<!-- 1. Status Bar (Top) -->
+<nav class="h-8 bg-[#202020] flex items-center justify-between px-4 border-b border-outline-variant z-50">
+<div class="flex items-center gap-2">
+<span class="font-headline text-[13px] tracking-tight text-on-surface-variant">▌sync.config</span>
+</div>
+<div class="flex items-center gap-3">
+<div class="flex items-center gap-1.5">
+<span class="w-2 h-2 rounded-full bg-warning animate-pulse"></span>
+<span class="font-label-caps text-[11px] text-warning">PENDING</span>
+</div>
+<span class="font-label-caps text-[11px] text-outline">v0.20.0</span>
+</div>
+</nav>
+<!-- Shared TopAppBar Component -->
+<header class="bg-surface flex justify-between items-center w-full px-margin-edge h-action-bar-height max-w-full border-b border-outline-variant">
+<div class="font-headline text-headline text-primary tracking-tighter uppercase">▌RS_TERMINAL_OS</div>
+<div class="hidden md:flex gap-6 items-center">
+<a class="font-label-caps text-label-caps uppercase tracking-widest text-on-surface-variant hover:text-primary transition-colors duration-120" href="#">PLAY</a>
+<a class="font-label-caps text-label-caps uppercase tracking-widest text-on-surface-variant hover:text-primary transition-colors duration-120" href="#">DAILY</a>
+<a class="font-label-caps text-label-caps uppercase tracking-widest text-primary border-b-2 border-primary pb-1" href="#">STATS</a>
+</div>
+<div class="flex gap-4">
+<span class="material-symbols-outlined text-primary cursor-pointer">account_circle</span>
+<span class="material-symbols-outlined text-primary cursor-pointer">sync</span>
+<span class="material-symbols-outlined text-primary cursor-pointer">settings</span>
+</div>
+</header>
+<main class="flex-grow p-4 md:p-8 max-w-3xl mx-auto w-full space-y-6">
+<!-- 2. Header Area -->
+<div class="h-20 flex flex-col justify-center border-l-2 border-outline-variant pl-4">
+<h1 class="font-headline text-[24px] font-bold text-suit-black leading-tight">SYNC PROGRESS</h1>
+<p class="font-body-md text-[12px] text-[#a0a0a0]">Connect to a server to sync games across devices.</p>
+</div>
+<!-- 3. Status Card -->
+<section class="bg-[#202020] rounded-[4px] p-4 border-l-[4px] border-warning flex flex-col gap-1">
+<h2 class="font-label-caps text-[10px] text-[#a0a0a0] uppercase tracking-widest">STATUS</h2>
+<div class="flex flex-col">
+<span class="font-headline text-[16px] font-bold text-[#a0a0a0]">○ NOT SIGNED IN</span>
+<span class="text-[11px] text-outline font-medium">Local progress only · Last attempt: never</span>
+</div>
+</section>
+<!-- 4. Login Form Card -->
+<section class="bg-[#202020] border border-outline-variant rounded-[4px] p-4 flex flex-col gap-5">
+<div class="flex items-center gap-2 border-b border-outline-variant pb-2 mb-1">
+<span class="font-headline text-[12px] text-[#a0a0a0] flex items-center">
+                    ▌ AUTH.toml <span class="ml-1 w-1.5 h-3 bg-primary-container animate-pulse"></span>
+</span>
+</div>
+<!-- Server URL -->
+<div class="flex flex-col gap-1.5">
+<label class="font-label-caps text-[10px] text-[#a0a0a0] uppercase tracking-widest">server_url</label>
+<div class="h-12 bg-[#1a1a1a] border border-outline-variant rounded-[2px] flex items-center px-4">
+<span class="font-headline text-[13px] text-suit-black">https://sync.rusty-solitaire.app</span>
+</div>
+</div>
+<!-- Email -->
+<div class="flex flex-col gap-1.5">
+<label class="font-label-caps text-[10px] text-[#a0a0a0] uppercase tracking-widest">email</label>
+<div class="h-12 bg-[#1a1a1a] border border-outline-variant rounded-[2px] flex items-center px-4">
+<span class="font-headline text-[13px] text-outline">/ user@example.com</span>
+</div>
+</div>
+<!-- Passcode -->
+<div class="flex flex-col gap-1.5">
+<label class="font-label-caps text-[10px] text-[#a0a0a0] uppercase tracking-widest">passcode</label>
+<div class="h-12 bg-[#1a1a1a] border border-outline-variant rounded-[2px] flex items-center justify-between px-4">
+<span class="font-headline text-[13px] text-outline">•••••••• (12 chars)</span>
+<span class="material-symbols-outlined text-outline cursor-pointer text-[18px]">visibility</span>
+</div>
+</div>
+</section>
+<!-- 5. Form Actions -->
+<div class="grid grid-cols-2 gap-4">
+<button class="h-12 bg-primary-container text-surface flex items-center justify-center rounded-[2px] font-headline text-[14px] font-bold active:scale-95 transition-transform">
+                ▶ SIGN IN
+            </button>
+<button class="h-12 border border-outline text-suit-black flex items-center justify-center rounded-[2px] font-headline text-[13px] font-medium hover:border-primary-container hover:text-primary-container transition-all">
+                + CREATE ACCOUNT
+            </button>
+</div>
+<!-- 6. Recent History Panel -->
+<section class="bg-[#202020] rounded-[4px] p-4 flex flex-col gap-3">
+<h2 class="font-label-caps text-[12px] text-[#a0a0a0] uppercase tracking-widest">RECENT</h2>
+<div class="space-y-2 border-l border-outline-variant pl-4">
+<div class="font-headline text-[11px] text-[#a0a0a0] flex items-center gap-2">
+<span class="text-outline">2026-05-07 17:38</span>
+<span class="text-outline">·</span>
+<span>○ no auth</span>
+<span class="text-outline">·</span>
+<span>skip</span>
+</div>
+<div class="font-headline text-[11px] text-[#a0a0a0] flex items-center gap-2">
+<span class="text-outline">2026-05-07 14:12</span>
+<span class="text-outline">·</span>
+<span>○ no auth</span>
+<span class="text-outline">·</span>
+<span>skip</span>
+</div>
+<div class="font-headline text-[11px] text-[#a0a0a0] flex items-center gap-2">
+<span class="text-outline">2026-05-06 09:01</span>
+<span class="text-outline">·</span>
+<span class="text-highlight-valid">✓ synced 12 games</span>
+</div>
+</div>
+</section>
+</main>
+<!-- 7. Footer -->
+<footer class="h-10 bg-surface border-t border-outline-variant flex items-center justify-between px-4 fixed bottom-0 w-full z-50">
+<div class="flex items-center gap-2 font-headline text-[11px]">
+<span class="text-primary-container">▌ NORMAL</span>
+<span class="text-outline">│</span>
+<span class="text-on-surface-variant">sync</span>
+</div>
+<div class="flex items-center gap-4 font-headline text-[11px] text-outline uppercase tracking-wider">
+<span>[ENTER] <span class="text-on-surface-variant">sign in</span></span>
+<span>[ESC] <span class="text-on-surface-variant">cancel</span></span>
+</div>
+</footer>
+<!-- Shared BottomNavBar Component (Mobile Only) -->
+<nav class="md:hidden fixed bottom-10 w-full z-50 flex justify-around items-center h-action-bar-height px-margin-edge bg-surface-container border-t border-outline-variant">
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:bg-surface-bright transition-all duration-120">
+<span class="material-symbols-outlined" data-icon="videogame_asset">videogame_asset</span>
+<span class="font-label-caps text-[10px] uppercase tracking-widest mt-1">F1_NEW_GAME</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:bg-surface-bright transition-all duration-120">
+<span class="material-symbols-outlined" data-icon="event_upcoming">event_upcoming</span>
+<span class="font-label-caps text-[10px] uppercase tracking-widest mt-1">F2_CHALLENGE</span>
+</div>
+<div class="flex flex-col items-center justify-center text-primary dark:text-primary-fixed-dim bg-surface-container-highest rounded-none p-2 transition-all duration-120 scale-95">
+<span class="material-symbols-outlined" data-icon="query_stats">query_stats</span>
+<span class="font-label-caps text-[10px] uppercase tracking-widest mt-1">F5_STATS</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:bg-surface-bright transition-all duration-120">
+<span class="material-symbols-outlined" data-icon="power_settings_new">power_settings_new</span>
+<span class="font-label-caps text-[10px] uppercase tracking-widest mt-1">ESC_EXIT</span>
+</div>
+</nav>
+<!-- Decorative Screen Texture -->
+<div class="fixed inset-0 pointer-events-none opacity-[0.03] scanline z-[100]"></div>
+</body></html>

docs/ui-mockups/theme-picker-mobile.html

@@ -0,0 +1,250 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500;600&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<style>.material-symbols-outlined {
+    font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24
+    }
+.scanline-pattern {
+    background: repeating-linear-gradient(0deg, #1a1a1a, #1a1a1a 2px, #151515 2px, #151515 4px)
+    }
+.checker-pattern {
+    background-color: #001e2c;
+    background-image: radial-gradient(#a1dcff 10%, transparent 10%), radial-gradient(#a1dcff 10%, transparent 10%);
+    background-size: 8px 8px;
+    background-position: 0 0, 4px 4px
+    }
+.stripe-pattern {
+    background: repeating-linear-gradient(0deg, #fb9fb1, #fb9fb1 4px, #202020 4px, #202020 8px)
+    }
+.polka-pattern {
+    background-color: #001e2c;
+    background-image: radial-gradient(#e0e3e6 15%, transparent 15%);
+    background-size: 12px 12px
+    }
+.vintage-pattern {
+    background-color: #d5ec8c;
+    background-image: url(https://lh3.googleusercontent.com/aida-public/AB6AXuD8S9vQTpEh-DjYtjB5CUHqi2CO326ZEjVVLJoOqG1AA6b92NZ6ctGoD4yZHKV7oHJnSFdvp3z3Wei9zfTI2EGAdrQfHxFYJ-h1DaeiZQY3vTa5khIQ83Sf-bjz2xiudHsjs3RyhSKC5bHv2c8_9t6YjepJdQnJa4GelCetFEs_agpN6u2IfMS1M9RrGxGKLl4K18fj0Pg3BW8IptX_ladhVFR5Hk8F0Reu5WHY8eQt1Nr-p9NNXl-w3C9Jz0uGSxi_Wb7R771lgQ);
+    opacity: 0.8
+    }</style>
+<script id="tailwind-config">
+        tailwind.config = {
+          darkMode: "class",
+          theme: {
+            extend: {
+              "colors": {
+                      "surface-variant": "#313538",
+                      "on-error-container": "#ffdad6",
+                      "warning": "#ddb26f",
+                      "on-surface": "#e0e3e6",
+                      "inverse-on-surface": "#2d3134",
+                      "on-secondary-fixed": "#161e00",
+                      "on-error": "#690005",
+                      "on-primary-fixed": "#001e2c",
+                      "primary-container": "#6fc2ef",
+                      "secondary-fixed-dim": "#bad073",
+                      "tertiary": "#f7c3ff",
+                      "surface-dim": "#101417",
+                      "surface-container-low": "#181c1f",
+                      "on-surface-variant": "#bfc8cf",
+                      "surface-container": "#1c2023",
+                      "secondary-container": "#435401",
+                      "error": "#fb9fb1",
+                      "on-tertiary": "#4c195b",
+                      "surface-tint": "#7ed0fe",
+                      "error-container": "#93000a",
+                      "tertiary-fixed": "#fbd7ff",
+                      "info": "#12cfc0",
+                      "tertiary-fixed-dim": "#f0b0fc",
+                      "highlight-valid": "#acc267",
+                      "on-primary": "#003549",
+                      "inverse-surface": "#e0e3e6",
+                      "primary": "#a1dcff",
+                      "surface-container-high": "#272a2d",
+                      "background": "#101417",
+                      "surface-container-lowest": "#0b0f11",
+                      "suit-red": "#fb9fb1",
+                      "suit-red-cb": "#6fc2ef",
+                      "surface": "#151515",
+                      "primary-fixed": "#c4e7ff",
+                      "outline": "#505050",
+                      "on-secondary": "#293500",
+                      "surface-container-highest": "#313538",
+                      "secondary-fixed": "#d5ec8c",
+                      "on-primary-container": "#004f6c",
+                      "suit-black": "#d0d0d0",
+                      "on-primary-fixed-variant": "#004c69",
+                      "on-tertiary-container": "#683476",
+                      "secondary": "#bad073",
+                      "highlight-celebration": "#e1a3ee",
+                      "on-tertiary-fixed": "#340043",
+                      "on-tertiary-fixed-variant": "#653173",
+                      "on-secondary-container": "#b2c86d",
+                      "surface-bright": "#363a3d",
+                      "primary-fixed-dim": "#7ed0fe",
+                      "on-secondary-fixed-variant": "#3c4d00",
+                      "inverse-primary": "#00668a",
+                      "outline-variant": "#3f484e",
+                      "on-background": "#e0e3e6",
+                      "tertiary-container": "#e1a3ee"
+              },
+              "borderRadius": {
+                      "DEFAULT": "0.125rem",
+                      "lg": "0.25rem",
+                      "xl": "0.5rem",
+                      "full": "0.75rem"
+              },
+              "spacing": {
+                      "stack-overlap": "2rem",
+                      "gutter-card": "0.375rem",
+                      "touch-target-min": "48dp",
+                      "action-bar-height": "64px",
+                      "margin-edge": "1rem"
+              },
+              "fontFamily": {
+                      "hud-score": ["JetBrains Mono"],
+                      "label-caps": ["JetBrains Mono"],
+                      "hud-timer": ["JetBrains Mono"],
+                      "card-rank": ["JetBrains Mono"],
+                      "headline": ["JetBrains Mono"],
+                      "body-md": ["Inter"]
+              },
+              "fontSize": {
+                      "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                      "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                      "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                      "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                      "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                      "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+              }
+            },
+          },
+        }
+    </script>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-surface selection:bg-primary-container selection:text-on-primary-container min-h-screen flex flex-col font-body-md overflow-x-hidden">
+<!-- TopAppBar Semantic Shell -->
+<header class="fixed top-0 w-full z-50 flex justify-between items-center h-[32px] px-margin-edge bg-surface-container border-b border-outline-variant">
+<div class="flex items-center gap-2">
+<span class="material-symbols-outlined text-[16px] text-primary" data-icon="terminal">terminal</span>
+<span class="font-headline text-[14px] font-bold text-on-surface">▌theme.picker</span>
+</div>
+<div class="flex items-center gap-2 cursor-pointer hover:opacity-80 transition-opacity">
+<span class="font-label-caps text-[12px] text-on-surface-variant uppercase">× CLOSE</span>
+</div>
+</header>
+<main class="mt-[32px] mb-[64px] flex-grow flex flex-col px-margin-edge py-6">
+<!-- Header Section -->
+<div class="flex justify-between items-start mb-8">
+<div class="flex-1">
+<h1 class="font-headline text-[24px] font-bold text-on-surface mb-1">CARD THEMES</h1>
+<p class="font-body-md text-[13px] text-on-surface-variant max-w-[280px]">Choose a card-face theme. Imported themes appear at the bottom.</p>
+</div>
+<div class="bg-surface-container-high px-2 py-1 border border-outline-variant">
+<span class="font-label-caps text-[11px] text-primary">5 INSTALLED</span>
+</div>
+</div>
+<!-- Theme Grid -->
+<div class="grid grid-cols-2 gap-4">
+<!-- Active Theme: Terminal -->
+<div class="relative flex flex-col bg-surface border-2 border-primary-container">
+<div class="aspect-[2.5/3.5] w-full p-2 overflow-hidden flex items-center justify-center bg-background">
+<!-- Card Preview -->
+<div class="w-24 h-36 bg-surface border border-primary-container scanline-pattern relative">
+<div class="absolute top-1 left-1 w-3 h-4 bg-primary-container"></div>
+<div class="absolute bottom-1 right-1 font-headline text-[10px] text-on-surface">▌RS</div>
+</div>
+</div>
+<div class="p-3 bg-surface-container-high border-t border-primary-container">
+<div class="flex justify-between items-center mb-1">
+<span class="font-headline text-[14px] font-bold truncate">Terminal</span>
+<span class="font-label-caps text-[10px] text-primary-container">✓ ACTIVE</span>
+</div>
+<span class="font-body-md text-[11px] text-on-surface-variant">by Rusty Solitaire</span>
+</div>
+</div>
+<!-- Theme: Classic -->
+<div class="relative flex flex-col bg-surface border border-outline">
+<div class="aspect-[2.5/3.5] w-full p-2 overflow-hidden flex items-center justify-center bg-background">
+<div class="w-24 h-36 bg-surface border border-outline checker-pattern"></div>
+</div>
+<div class="p-3 bg-surface-container-low border-t border-outline">
+<span class="font-headline text-[14px] font-bold block truncate">Classic</span>
+<span class="font-body-md text-[11px] text-on-surface-variant">by Rusty Solitaire</span>
+</div>
+</div>
+<!-- Theme: Stripes -->
+<div class="relative flex flex-col bg-surface border border-outline">
+<div class="aspect-[2.5/3.5] w-full p-2 overflow-hidden flex items-center justify-center bg-background">
+<div class="w-24 h-36 bg-surface border border-outline stripe-pattern"></div>
+</div>
+<div class="p-3 bg-surface-container-low border-t border-outline">
+<span class="font-headline text-[14px] font-bold block truncate">Stripes</span>
+<span class="font-body-md text-[11px] text-on-surface-variant">by hayeah</span>
+</div>
+</div>
+<!-- Theme: Polka -->
+<div class="relative flex flex-col bg-surface border border-outline">
+<div class="aspect-[2.5/3.5] w-full p-2 overflow-hidden flex items-center justify-center bg-background">
+<div class="w-24 h-36 bg-surface border border-outline polka-pattern"></div>
+</div>
+<div class="p-3 bg-surface-container-low border-t border-outline">
+<span class="font-headline text-[14px] font-bold block truncate">Polka</span>
+<span class="font-body-md text-[11px] text-on-surface-variant">by hayeah</span>
+</div>
+</div>
+<!-- Theme: Vintage -->
+<div class="relative flex flex-col bg-surface border border-outline">
+<div class="aspect-[2.5/3.5] w-full p-2 overflow-hidden flex items-center justify-center bg-background">
+<div class="w-24 h-36 bg-surface border border-outline vintage-pattern"></div>
+</div>
+<div class="p-3 bg-surface-container-low border-t border-outline">
+<span class="font-headline text-[14px] font-bold block truncate">Vintage</span>
+<span class="font-body-md text-[11px] text-on-surface-variant">by hayeah</span>
+</div>
+</div>
+<!-- Import Theme -->
+<div class="relative flex flex-col bg-surface border-2 border-dashed border-outline-variant hover:border-primary-container transition-colors cursor-pointer">
+<div class="aspect-[2.5/3.5] w-full flex flex-col items-center justify-center gap-3">
+<span class="material-symbols-outlined text-[32px] text-primary-container" data-icon="add">add</span>
+<span class="font-label-caps text-[10px] text-on-surface-variant tracking-widest text-center px-4">IMPORT FROM .ZIP</span>
+</div>
+<div class="p-3 bg-surface-container-low border-t border-outline-variant">
+<span class="font-headline text-[14px] font-bold block truncate">+ IMPORT THEME</span>
+<span class="font-body-md text-[11px] opacity-0">spacer</span>
+</div>
+</div>
+</div>
+</main>
+<!-- BottomNavBar Semantic Shell -->
+<footer class="fixed bottom-0 left-0 w-full h-[64px] z-50 bg-surface-container border-t border-outline-variant flex justify-between items-center px-margin-edge pb-safe">
+<div class="flex items-center gap-2">
+<span class="font-headline text-[14px] font-bold text-on-surface">▌ NORMAL</span>
+<span class="text-on-surface-variant">│</span>
+<span class="font-label-caps text-[12px] text-on-surface-variant">theme</span>
+</div>
+<div class="flex items-center gap-3">
+<div class="flex items-center">
+<span class="text-on-surface-variant font-label-caps text-[11px]">[ENTER]</span>
+<span class="text-on-surface-variant font-body-md text-[11px] ml-1">activate</span>
+</div>
+<div class="flex items-center">
+<span class="text-on-surface-variant font-label-caps text-[11px]">[I]</span>
+<span class="text-on-surface-variant font-body-md text-[11px] ml-1">import</span>
+</div>
+<div class="flex items-center">
+<span class="text-on-surface-variant font-label-caps text-[11px]">[ESC]</span>
+<span class="text-on-surface-variant font-body-md text-[11px] ml-1">back</span>
+</div>
+</div>
+</footer>
+</body></html>

docs/ui-mockups/time-attack-mobile.html

@@ -0,0 +1,215 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Rusty Solitaire - Time Attack Configuration</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&amp;family=Inter:wght@400;500&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "surface-tint": "#7ed0fe",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "primary-container": "#6fc2ef",
+                        "surface-container-high": "#272a2d",
+                        "tertiary": "#f7c3ff",
+                        "suit-black": "#d0d0d0",
+                        "secondary-container": "#435401",
+                        "on-error-container": "#ffdad6",
+                        "on-surface-variant": "#bfc8cf",
+                        "surface-dim": "#101417",
+                        "on-primary-container": "#004f6c",
+                        "info": "#12cfc0",
+                        "outline-variant": "#3f484e",
+                        "surface": "#151515",
+                        "inverse-on-surface": "#2d3134",
+                        "surface-container-low": "#181c1f",
+                        "on-secondary-container": "#b2c86d",
+                        "on-primary-fixed-variant": "#004c69",
+                        "inverse-primary": "#00668a",
+                        "suit-red": "#fb9fb1",
+                        "tertiary-fixed": "#fbd7ff",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-surface": "#d0d0d0",
+                        "on-secondary": "#293500",
+                        "error-container": "#93000a",
+                        "highlight-valid": "#acc267",
+                        "surface-container-highest": "#313538",
+                        "primary": "#a1dcff",
+                        "secondary-fixed": "#d5ec8c",
+                        "error": "#fb9fb1",
+                        "outline": "#505050",
+                        "tertiary-container": "#e1a3ee",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "highlight-celebration": "#e1a3ee",
+                        "surface-container": "#202020",
+                        "on-primary": "#003549",
+                        "on-error": "#690005",
+                        "warning": "#ddb26f",
+                        "suit-red-cb": "#6fc2ef",
+                        "on-primary-fixed": "#001e2c",
+                        "on-secondary-fixed": "#161e00",
+                        "on-tertiary-fixed": "#340043",
+                        "on-background": "#e0e3e6",
+                        "on-tertiary": "#4c195b",
+                        "inverse-surface": "#e0e3e6",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "background": "#101417",
+                        "surface-variant": "#313538",
+                        "secondary": "#bad073",
+                        "on-tertiary-container": "#683476",
+                        "surface-bright": "#363a3d",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "primary-fixed": "#c4e7ff"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "margin-edge": "1rem",
+                        "touch-target-min": "48px",
+                        "stack-overlap": "2rem",
+                        "gutter-card": "0.375rem",
+                        "action-bar-height": "64px"
+                    },
+                    "fontFamily": {
+                        "label-caps": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "hud-timer": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        body { background-color: #151515; color: #d0d0d0; }
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .scanline {
+            background: linear-gradient(to bottom, rgba(255,255,255,0) 50%, rgba(0,0,0,0.1) 50%);
+            background-size: 100% 4px;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="flex items-center justify-center min-h-screen">
+<!-- Mobile Container (390x844) -->
+<div class="w-[390px] h-[844px] bg-surface relative flex flex-col overflow-hidden border border-outline-variant">
+<!-- STATUS BAR -->
+<header class="h-8 bg-surface-container flex items-center justify-between px-4 z-10">
+<span class="font-headline text-[12px] tracking-tight text-primary">▌time-attack.tsx</span>
+<span class="font-label-caps text-[10px] text-on-surface-variant">MODE · TIMED</span>
+</header>
+<!-- TOP APP BAR (from JSON) -->
+<nav class="flex justify-between items-center w-full px-margin-edge h-action-bar-height max-w-full bg-surface text-primary font-headline text-headline font-bold border-b border-outline-variant">
+<div class="font-headline text-headline text-primary tracking-tighter uppercase">▌RS_TERMINAL_OS</div>
+<div class="flex gap-4">
+<span class="material-symbols-outlined cursor-pointer hover:text-primary-fixed transition-colors duration-120">account_circle</span>
+<span class="material-symbols-outlined cursor-pointer hover:text-primary-fixed transition-colors duration-120">sync</span>
+<span class="material-symbols-outlined cursor-pointer hover:text-primary-fixed transition-colors duration-120">settings</span>
+</div>
+</nav>
+<!-- MAIN CONTENT -->
+<main class="flex-1 px-4 py-4 flex flex-col gap-4 overflow-y-auto">
+<!-- HERO BAND -->
+<section class="flex flex-col items-center justify-center h-[100px] text-center">
+<h1 class="font-headline text-[32px] font-bold tracking-tighter text-on-surface uppercase">TIME ATTACK</h1>
+<p class="font-body-md text-[12px] text-on-surface-variant max-w-[280px]">Race the clock. The faster you finish, the higher your score.</p>
+</section>
+<!-- TIMER DISPLAY -->
+<section class="w-full h-[120px] bg-surface-dim border border-outline-variant flex flex-col items-center justify-center relative overflow-hidden">
+<div class="absolute inset-0 scanline opacity-10 pointer-events-none"></div>
+<div class="font-headline text-[64px] font-bold tracking-tight text-primary tabular-nums leading-none">05:00</div>
+<div class="font-label-caps text-[11px] uppercase tracking-[0.2em] text-on-surface-variant mt-2">MINUTES</div>
+</section>
+<!-- DURATION PICKER -->
+<section class="grid grid-cols-4 gap-px bg-outline-variant border border-outline-variant">
+<button class="h-12 bg-surface-container font-label-caps text-[12px] text-on-surface hover:bg-surface-bright transition-all">1 MIN</button>
+<button class="h-12 bg-surface-container font-label-caps text-[12px] text-on-surface hover:bg-surface-bright transition-all">3 MIN</button>
+<button class="h-12 bg-primary text-on-primary font-bold font-label-caps text-[12px]">5 MIN</button>
+<button class="h-12 bg-surface-container font-label-caps text-[12px] text-on-surface hover:bg-surface-bright transition-all">10 MIN</button>
+</section>
+<!-- RULES CARD -->
+<section class="bg-surface-container h-20 p-3 border border-outline-variant flex flex-col justify-between">
+<div class="font-label-caps text-[10px] text-on-surface-variant uppercase tracking-widest">RULES</div>
+<div class="font-headline text-[12px] text-on-surface flex items-center gap-2">
+<span class="w-1 h-1 bg-primary"></span> DRAW-3 
+                    <span class="w-1 h-1 bg-primary ml-2"></span> NO HINT PENALTY 
+                    <span class="w-1 h-1 bg-primary ml-2"></span> +50 XP / WIN
+                </div>
+</section>
+<!-- BEST RUN CARD -->
+<section class="bg-surface-container h-16 p-3 border border-outline-variant flex items-center justify-between">
+<div class="flex flex-col">
+<div class="font-label-caps text-[10px] text-on-surface-variant uppercase tracking-widest">PERSONAL BEST · 5 MIN</div>
+<div class="font-headline text-[24px] font-bold text-on-surface leading-tight">02:47 <span class="text-[12px] font-normal text-on-surface-variant">WIN</span></div>
+</div>
+<div class="flex flex-col items-end">
+<div class="font-label-caps text-[10px] text-on-surface-variant">GLOBAL RANK 142</div>
+<div class="bg-warning text-on-surface text-[9px] px-1.5 py-0.5 font-bold mt-1">TOP 5%</div>
+</div>
+</section>
+<!-- PRIMARY CTA -->
+<section class="mt-auto pt-4">
+<button class="w-full h-20 bg-primary text-on-primary flex flex-col items-center justify-center transition-all active:scale-[0.98] duration-80">
+<div class="font-headline text-[18px] font-extrabold uppercase tracking-[0.2em] flex items-center gap-2">
+<span class="material-symbols-outlined" style="font-variation-settings: 'FILL' 1;">play_arrow</span> BEGIN COUNTDOWN
+                    </div>
+</button>
+<p class="font-body-md text-[11px] text-on-surface-variant text-center mt-3">Game starts after a 3-second countdown.</p>
+</section>
+</main>
+<!-- FOOTER -->
+<footer class="h-6 bg-surface-container-lowest flex items-center justify-between px-4 border-t border-outline-variant">
+<span class="font-headline text-[10px] text-on-surface-variant">▌ NORMAL │ time-attack</span>
+<span class="font-label-caps text-[9px] text-on-surface-variant uppercase">[ENTER] begin · [ESC] back</span>
+</footer>
+<!-- BOTTOM NAV BAR (from JSON) -->
+<nav class="fixed bottom-0 w-[390px] z-50 flex justify-around items-center h-action-bar-height px-margin-edge bg-surface-container border-t border-outline-variant">
+<div class="flex flex-col items-center justify-center text-primary bg-surface-container-highest rounded-none p-2 transition-transform duration-80 active:scale-95">
+<span class="material-symbols-outlined text-primary" style="font-variation-settings: 'FILL' 1;">videogame_asset</span>
+<span class="font-label-caps text-label-caps uppercase tracking-widest">F1_NEW_GAME</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:bg-surface-bright transition-all duration-120">
+<span class="material-symbols-outlined">event_upcoming</span>
+<span class="font-label-caps text-label-caps uppercase tracking-widest">F2_CHALLENGE</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:bg-surface-bright transition-all duration-120">
+<span class="material-symbols-outlined">query_stats</span>
+<span class="font-label-caps text-label-caps uppercase tracking-widest">F5_STATS</span>
+</div>
+<div class="flex flex-col items-center justify-center text-on-surface-variant p-2 hover:bg-surface-bright transition-all duration-120">
+<span class="material-symbols-outlined">power_settings_new</span>
+<span class="font-label-caps text-label-caps uppercase tracking-widest">ESC_EXIT</span>
+</div>
+</nav>
+<!-- PADDING FOR FIXED NAV -->
+<div class="h-action-bar-height"></div>
+</div>
+</body></html>

docs/ui-mockups/weekly-goals-mobile.html

@@ -0,0 +1,265 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>Weekly Goals - Rusty Solitaire</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500&amp;family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "surface-container-high": "#272a2d",
+                        "on-primary": "#003549",
+                        "highlight-valid": "#acc267",
+                        "primary-container": "#6fc2ef",
+                        "on-error-container": "#ffdad6",
+                        "surface-tint": "#7ed0fe",
+                        "outline": "#505050",
+                        "on-primary-container": "#004f6c",
+                        "on-background": "#e0e3e6",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "error": "#fb9fb1",
+                        "suit-black": "#d0d0d0",
+                        "secondary": "#bad073",
+                        "on-secondary-fixed": "#161e00",
+                        "surface-container": "#202020",
+                        "primary": "#a1dcff",
+                        "error-container": "#93000a",
+                        "secondary-fixed": "#d5ec8c",
+                        "surface-container-highest": "#313538",
+                        "surface-dim": "#101417",
+                        "suit-red": "#fb9fb1",
+                        "warning": "#ddb26f",
+                        "secondary-fixed-dim": "#bad073",
+                        "highlight-celebration": "#e1a3ee",
+                        "on-tertiary-container": "#683476",
+                        "on-surface": "#e0e3e6",
+                        "on-surface-variant": "#bfc8cf",
+                        "inverse-on-surface": "#2d3134",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "tertiary-fixed": "#fbd7ff",
+                        "info": "#12cfc0",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "surface-variant": "#313538",
+                        "inverse-primary": "#00668a",
+                        "suit-red-cb": "#6fc2ef",
+                        "tertiary-container": "#e1a3ee",
+                        "secondary-container": "#435401",
+                        "primary-fixed": "#c4e7ff",
+                        "surface-container-low": "#181c1f",
+                        "background": "#101417",
+                        "inverse-surface": "#e0e3e6",
+                        "surface-bright": "#363a3d",
+                        "on-primary-fixed": "#001e2c",
+                        "surface-container-lowest": "#0b0f11",
+                        "on-secondary": "#293500",
+                        "on-secondary-container": "#b2c86d",
+                        "on-tertiary": "#4c195b",
+                        "tertiary": "#f7c3ff",
+                        "outline-variant": "#3f484e",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "on-tertiary-fixed": "#340043",
+                        "on-primary-fixed-variant": "#004c69",
+                        "surface": "#151515",
+                        "on-error": "#690005"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "margin-edge": "1rem",
+                        "touch-target-min": "48dp",
+                        "gutter-card": "0.375rem",
+                        "stack-overlap": "2rem",
+                        "action-bar-height": "64px"
+                    },
+                    "fontFamily": {
+                        "headline": ["JetBrains Mono"],
+                        "body-md": ["Inter"],
+                        "label-caps": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}]
+                    }
+                }
+            }
+        }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+            vertical-align: middle;
+        }
+        .tabular-nums { font-variant-numeric: tabular-nums; }
+        ::-webkit-scrollbar { width: 4px; }
+        ::-webkit-scrollbar-track { background: #151515; }
+        ::-webkit-scrollbar-thumb { background: #353535; border-radius: 2px; }
+        
+        /* Scanline Overlay Effect */
+        .crt-overlay {
+            pointer-events: none;
+            position: fixed;
+            top: 0; left: 0; bottom: 0; right: 0;
+            background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
+            background-size: 100% 3px, 3px 100%;
+            z-index: 100;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-surface font-body-md selection:bg-primary-container selection:text-on-primary-container overflow-hidden h-screen flex flex-col">
+<!-- Top Status Bar -->
+<div class="h-[32px] bg-surface flex items-center justify-between px-margin-edge z-50 shrink-0">
+<div class="font-label-caps text-[12px] text-[#a0a0a0] flex items-center">
+<span class="mr-1">▌</span>weekly-goals.json
+        </div>
+<div class="bg-warning/10 text-warning px-2 py-0.5 rounded-sm flex items-center gap-1.5">
+<span class="material-symbols-outlined text-[14px]">timer</span>
+<span class="font-headline text-[10px] font-bold tabular-nums tracking-wider uppercase">RESETS IN 2D 14H</span>
+</div>
+</div>
+<!-- Main Header Band -->
+<header class="h-[80px] px-margin-edge flex flex-col justify-center border-b border-outline/20 shrink-0">
+<h1 class="font-headline text-[24px] font-bold text-suit-black tracking-tight leading-none">WEEKLY GOALS</h1>
+<p class="font-body-md text-[12px] text-[#a0a0a0] mt-1">Complete goals before reset to claim XP and rewards.</p>
+</header>
+<!-- Main Content Canvas -->
+<main class="flex-1 overflow-y-auto px-margin-edge py-4 space-y-4">
+<!-- Overall Progress Card -->
+<section class="h-[80px] bg-surface-container border border-outline/30 rounded-[4px] p-4 flex flex-col justify-between">
+<div class="flex justify-between items-center">
+<span class="font-label-caps text-[10px] text-[#a0a0a0] tracking-widest uppercase">OVERALL · 3/5</span>
+<span class="font-headline text-[12px] text-highlight-celebration tabular-nums">(60%)</span>
+</div>
+<div class="w-full h-[6px] bg-[#353535] rounded-full overflow-hidden">
+<div class="h-full bg-highlight-celebration w-[60%]"></div>
+</div>
+<div class="flex justify-end">
+<div class="font-label-caps text-[11px] text-highlight-valid flex items-center gap-1">
+<span class="material-symbols-outlined text-[14px]">stars</span>
+                    +220 XP CLAIMED
+                </div>
+</div>
+</section>
+<!-- Goal List -->
+<div class="space-y-2 pb-16">
+<!-- Goal 1: COMPLETED -->
+<div class="h-[88px] bg-surface-container border border-outline/30 rounded-[4px] p-3 flex flex-col justify-between">
+<div class="flex justify-between items-start">
+<h3 class="font-headline text-[14px] font-bold text-suit-black">PLAY 10 GAMES</h3>
+<div class="bg-highlight-valid/10 text-highlight-valid px-2 py-0.5 rounded-sm font-label-caps text-[11px]">+50 XP</div>
+</div>
+<div class="w-full h-[4px] bg-[#353535] rounded-full">
+<div class="h-full bg-highlight-valid w-full"></div>
+</div>
+<div class="flex justify-between items-center font-label-caps text-[10px]">
+<span class="text-[#a0a0a0]">10/10 GAMES</span>
+<span class="text-highlight-valid flex items-center gap-1">✓ CLAIMED</span>
+</div>
+</div>
+<!-- Goal 2: COMPLETED -->
+<div class="h-[88px] bg-surface-container border border-outline/30 rounded-[4px] p-3 flex flex-col justify-between">
+<div class="flex justify-between items-start">
+<h3 class="font-headline text-[14px] font-bold text-suit-black">WIN 5 DAILY SEEDS</h3>
+<div class="bg-highlight-celebration/10 text-highlight-celebration px-2 py-0.5 rounded-sm font-label-caps text-[11px]">+100 XP</div>
+</div>
+<div class="w-full h-[4px] bg-[#353535] rounded-full">
+<div class="h-full bg-highlight-valid w-full"></div>
+</div>
+<div class="flex justify-between items-center font-label-caps text-[10px]">
+<span class="text-[#a0a0a0]">5/5 DONE</span>
+<span class="text-highlight-valid flex items-center gap-1">✓ CLAIMED</span>
+</div>
+</div>
+<!-- Goal 3: IN PROGRESS -->
+<div class="h-[88px] bg-surface-container border border-outline/30 rounded-[4px] p-3 flex flex-col justify-between border-l-2 border-l-primary-container">
+<div class="flex justify-between items-start">
+<h3 class="font-headline text-[14px] font-bold text-suit-black">WIN UNDER 4:00 (3 TIMES)</h3>
+<div class="bg-highlight-valid/10 text-highlight-valid px-2 py-0.5 rounded-sm font-label-caps text-[11px]">+75 XP</div>
+</div>
+<div class="w-full h-[4px] bg-[#353535] rounded-full">
+<div class="h-full bg-primary-container w-[66%]"></div>
+</div>
+<div class="flex justify-between items-center font-label-caps text-[10px]">
+<span class="text-[#a0a0a0]">2/3</span>
+<span class="text-primary-container flex items-center gap-1">▶ IN PROGRESS</span>
+</div>
+</div>
+<!-- Goal 4: NOT STARTED -->
+<div class="h-[88px] bg-surface-container border border-outline/30 rounded-[4px] p-3 flex flex-col justify-between opacity-70">
+<div class="flex justify-between items-start">
+<h3 class="font-headline text-[14px] font-bold text-suit-black">PERFECT GAME (NO UNDO)</h3>
+<div class="bg-warning/10 text-warning px-2 py-0.5 rounded-sm font-label-caps text-[11px]">+150 XP</div>
+</div>
+<div class="w-full h-[4px] bg-[#353535] rounded-full">
+<div class="h-full bg-outline w-0"></div>
+</div>
+<div class="flex justify-between items-center font-label-caps text-[10px]">
+<span class="text-[#a0a0a0]">0/1</span>
+<span class="text-outline flex items-center gap-1">○ NOT STARTED</span>
+</div>
+</div>
+<!-- Goal 5: IN PROGRESS -->
+<div class="h-[88px] bg-surface-container border border-outline/30 rounded-[4px] p-3 flex flex-col justify-between border-l-2 border-l-primary-container">
+<div class="flex justify-between items-start">
+<h3 class="font-headline text-[14px] font-bold text-suit-black">STREAK OF 5 WINS</h3>
+<div class="bg-highlight-valid/10 text-highlight-valid px-2 py-0.5 rounded-sm font-label-caps text-[11px]">+50 XP</div>
+</div>
+<div class="w-full h-[4px] bg-[#353535] rounded-full">
+<div class="h-full bg-primary-container w-[60%]"></div>
+</div>
+<div class="flex justify-between items-center font-label-caps text-[10px]">
+<span class="text-[#a0a0a0]">3/5</span>
+<span class="text-primary-container flex items-center gap-1">▶ IN PROGRESS</span>
+</div>
+</div>
+</div>
+</main>
+<!-- Navigation Shell from JSON -->
+<nav class="fixed bottom-0 left-0 w-full z-50 flex justify-around items-center px-margin-edge bg-surface-container border-t border-outline-variant h-action-bar-height">
+<button class="flex flex-col items-center justify-center text-on-surface-variant hover:text-primary transition-colors duration-120 active:scale-95 transition-transform duration-80">
+<span class="material-symbols-outlined">refresh</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant hover:text-primary transition-colors duration-120 active:scale-95 transition-transform duration-80">
+<span class="material-symbols-outlined">undo</span>
+</button>
+<button class="flex flex-col items-center justify-center text-primary active:scale-95 transition-transform duration-80">
+<span class="material-symbols-outlined" style="font-variation-settings: 'FILL' 1;">style</span>
+</button>
+<button class="flex flex-col items-center justify-center text-on-surface-variant hover:text-primary transition-colors duration-120 active:scale-95 transition-transform duration-80">
+<span class="material-symbols-outlined">help_outline</span>
+</button>
+</nav>
+<!-- Bottom Terminal Status Footer -->
+<footer class="fixed bottom-[64px] left-0 w-full h-[24px] bg-surface flex items-center justify-between px-margin-edge z-50 border-t border-outline/10">
+<div class="font-label-caps text-[10px] text-[#a0a0a0]">
+<span class="text-primary">▌</span> NORMAL │ weekly
+        </div>
+<div class="font-label-caps text-[10px] flex gap-3">
+<span class="text-[#505050]"><span class="text-[#a0a0a0]">[C]</span> claim all</span>
+<span class="text-[#505050]"><span class="text-[#a0a0a0]">[ESC]</span> back</span>
+</div>
+</footer>
+<!-- CRT Overlay -->
+<div class="crt-overlay"></div>
+</body></html>

docs/ui-mockups/win-summary-mobile.html

@@ -0,0 +1,200 @@
+<!DOCTYPE html>
+
+<html class="dark" lang="en"><head>
+<meta charset="utf-8"/>
+<meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+<title>ROOT@SOLITAIRE:~ | Win Summary</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&amp;family=Inter:wght@400;500;700&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet"/>
+<script id="tailwind-config">
+        tailwind.config = {
+            darkMode: "class",
+            theme: {
+                extend: {
+                    "colors": {
+                        "primary-fixed": "#c4e7ff",
+                        "inverse-surface": "#e0e3e6",
+                        "on-tertiary": "#4c195b",
+                        "suit-red-cb": "#6fc2ef",
+                        "secondary-fixed-dim": "#bad073",
+                        "on-secondary-fixed-variant": "#3c4d00",
+                        "on-secondary-fixed": "#161e00",
+                        "surface-container-highest": "#313538",
+                        "primary-fixed-dim": "#7ed0fe",
+                        "on-secondary": "#293500",
+                        "on-background": "#e0e3e6",
+                        "highlight-celebration": "#e1a3ee",
+                        "warning": "#ddb26f",
+                        "on-tertiary-fixed-variant": "#653173",
+                        "background": "#101417",
+                        "surface-container-lowest": "#0b0f11",
+                        "info": "#12cfc0",
+                        "tertiary-container": "#e1a3ee",
+                        "surface-container": "#202020",
+                        "secondary": "#bad073",
+                        "outline": "#505050",
+                        "tertiary-fixed-dim": "#f0b0fc",
+                        "secondary-container": "#435401",
+                        "inverse-primary": "#00668a",
+                        "surface": "#151515",
+                        "on-error-container": "#ffdad6",
+                        "error-container": "#93000a",
+                        "surface-bright": "#363a3d",
+                        "surface-dim": "#101417",
+                        "on-primary-fixed-variant": "#004c69",
+                        "on-tertiary-fixed": "#340043",
+                        "inverse-on-surface": "#2d3134",
+                        "surface-container-high": "#272a2d",
+                        "secondary-fixed": "#d5ec8c",
+                        "on-tertiary-container": "#683476",
+                        "on-secondary-container": "#b2c86d",
+                        "surface-tint": "#7ed0fe",
+                        "on-primary-container": "#004f6c",
+                        "on-error": "#690005",
+                        "on-surface": "#e0e3e6",
+                        "surface-variant": "#313538",
+                        "highlight-valid": "#acc267",
+                        "primary": "#a1dcff"
+                    },
+                    "borderRadius": {
+                        "DEFAULT": "0.125rem",
+                        "lg": "0.25rem",
+                        "xl": "0.5rem",
+                        "full": "0.75rem"
+                    },
+                    "spacing": {
+                        "margin-edge": "1rem",
+                        "action-bar-height": "64px",
+                        "gutter-card": "0.375rem",
+                        "touch-target-min": "48dp",
+                        "stack-overlap": "2rem"
+                    },
+                    "fontFamily": {
+                        "body-md": ["Inter"],
+                        "label-caps": ["JetBrains Mono"],
+                        "card-rank": ["JetBrains Mono"],
+                        "hud-timer": ["JetBrains Mono"],
+                        "headline": ["JetBrains Mono"],
+                        "hud-score": ["JetBrains Mono"]
+                    },
+                    "fontSize": {
+                        "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "label-caps": ["12px", {"lineHeight": "16px", "letterSpacing": "0.08em", "fontWeight": "500"}],
+                        "card-rank": ["18px", {"lineHeight": "18px", "fontWeight": "700"}],
+                        "hud-timer": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                        "headline": ["28px", {"lineHeight": "32px", "letterSpacing": "-0.01em", "fontWeight": "700"}],
+                        "hud-score": ["24px", {"lineHeight": "32px", "letterSpacing": "-0.02em", "fontWeight": "700"}]
+                    }
+                },
+            },
+        }
+    </script>
+<style>
+        .crt-scanlines {
+            background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.02), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.02));
+            background-size: 100% 2px, 3px 100%;
+            pointer-events: none;
+        }
+        .lavender-glow {
+            text-shadow: 0 0 16px rgba(225, 163, 238, 0.3);
+        }
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+    </style>
+<style>
+    body {
+      min-height: max(884px, 100dvh);
+    }
+  </style>
+  </head>
+<body class="bg-background text-on-background font-body-md selection:bg-primary-container selection:text-on-primary-container min-h-screen flex flex-col relative overflow-hidden">
+<!-- CRT Overlay -->
+<div class="fixed inset-0 crt-scanlines z-[100] opacity-30"></div>
+<!-- Status Bar (Emulating TopAppBar context) -->
+<header class="h-[32px] bg-surface-container flex items-center justify-between px-margin-edge z-50 border-b border-outline-variant">
+<div class="flex items-center gap-2">
+<span class="font-label-caps text-[11px] text-on-surface">▌win.tsx</span>
+</div>
+<div class="flex items-center gap-4">
+<div class="flex items-center gap-1">
+<span class="w-2 h-2 rounded-full bg-info"></span>
+<span class="font-label-caps text-[11px] text-info uppercase">Synced</span>
+</div>
+<span class="font-label-caps text-[11px] text-outline uppercase tracking-tight">v0.20.0</span>
+</div>
+</header>
+<!-- Content Canvas -->
+<main class="flex-1 flex flex-col px-margin-edge pt-12 pb-8 gap-8 relative z-10">
+<!-- Hero Band -->
+<section class="flex flex-col items-center text-center space-y-2">
+<h1 class="font-headline text-[48px] leading-tight text-highlight-celebration uppercase lavender-glow tracking-tighter">
+                █ COMPLETE
+            </h1>
+<p class="font-label-caps text-[12px] text-outline-variant tracking-[0.2em]">
+                GAME #2024-127 · DRAW-3
+            </p>
+</section>
+<!-- Stats Card -->
+<section class="bg-surface-container border border-outline-variant rounded-lg overflow-hidden p-6 grid grid-cols-2 gap-y-8 gap-x-4">
+<div class="space-y-1">
+<span class="block font-label-caps text-outline uppercase text-[10px]">Final Score</span>
+<span class="block font-hud-score text-on-background">1,024</span>
+</div>
+<div class="space-y-1">
+<span class="block font-label-caps text-outline uppercase text-[10px]">Time</span>
+<span class="block font-hud-timer text-on-background">12:34</span>
+</div>
+<div class="space-y-1">
+<span class="block font-label-caps text-outline uppercase text-[10px]">Moves</span>
+<span class="block font-hud-timer text-on-background">87</span>
+</div>
+<div class="space-y-1">
+<span class="block font-label-caps text-outline uppercase text-[10px]">Par Delta</span>
+<span class="block font-hud-timer text-highlight-valid">−13</span>
+</div>
+</section>
+<!-- Achievement Card -->
+<section class="bg-surface-container border-l-2 border-highlight-celebration rounded-r-lg p-4 flex items-center justify-between">
+<div class="space-y-1">
+<span class="font-label-caps text-highlight-celebration text-[10px] flex items-center gap-1">
+<span class="text-[8px]">▲</span> ACHIEVEMENT UNLOCKED
+                </span>
+<p class="font-label-caps text-suit-black uppercase tracking-wider text-[14px]">FIRST DAILY WIN</p>
+</div>
+<div class="w-12 h-12 rounded-full border border-outline-variant flex items-center justify-center bg-surface-container-low">
+<span class="material-symbols-outlined text-highlight-celebration text-2xl" data-icon="military_tech">military_tech</span>
+</div>
+</section>
+<!-- Action Buttons -->
+<div class="mt-auto space-y-3">
+<button class="w-full h-[56px] bg-info text-surface font-label-caps text-[14px] font-bold tracking-widest flex items-center justify-center gap-2 hover:opacity-90 active:opacity-80 transition-all uppercase">
+<span class="text-lg">▶</span> New Game
+            </button>
+<div class="grid grid-cols-2 gap-3">
+<button class="h-[48px] border border-outline text-on-surface-variant font-label-caps text-[12px] flex items-center justify-center gap-2 hover:border-info hover:text-info transition-colors uppercase">
+<span class="text-sm">↺</span> Replay Seed
+                </button>
+<button class="h-[48px] border border-outline text-on-surface-variant font-label-caps text-[12px] flex items-center justify-center gap-2 hover:border-info hover:text-info transition-colors uppercase">
+<span class="text-sm">⌂</span> Home
+                </button>
+</div>
+</div>
+</main>
+<!-- Footer Keys -->
+<footer class="h-action-bar-height flex flex-col items-center justify-center px-margin-edge border-t border-outline-variant bg-surface-container-low">
+<div class="flex gap-4">
+<div class="flex items-center gap-1.5">
+<span class="font-label-caps text-outline-variant">[ S ]</span>
+<span class="font-label-caps text-outline uppercase text-[10px]">share screenshot</span>
+</div>
+<div class="flex items-center gap-1.5">
+<span class="font-label-caps text-outline-variant">[ X ]</span>
+<span class="font-label-caps text-outline uppercase text-[10px]">copy seed</span>
+</div>
+</div>
+</footer>
+<!-- Bottom Nav Suppression Logic: This is a task-focused confirmation screen, so the global BottomNavBar from JSON is suppressed to focus on primary actions. -->
+</body></html>

solitaire_app/Cargo.toml

@@ -8,8 +8,68 @@ edition.workspace = true
 name = "solitaire_app"
 path = "src/main.rs"
 
+# `cdylib` is what cargo-apk packages into `libsolitaire_app.so` for
+# Android — the activity dlopens the shared object and calls into it.
+# `rlib` lets the bin target above link the library normally on
+# desktop. Both produce the same code; only the linkage form differs.
+[lib]
+name = "solitaire_app"
+path = "src/lib.rs"
+crate-type = ["cdylib", "rlib"]
+
 [dependencies]
 bevy             = { workspace = true }
 solitaire_engine = { workspace = true }
 solitaire_data   = { workspace = true }
+
+# `keyring`'s default-store init only matters on platforms with a
+# real keychain backend (Linux Secret Service, macOS Keychain,
+# Windows Credential Store). The crate also pulls `rpassword`
+# transitively, which uses `libc::__errno_location` — a symbol
+# Android's bionic doesn't expose. Target-gating keeps
+# `cargo apk build` viable; the call site in `lib.rs` has its own
+# `cfg(not(target_os = "android"))` guard so the desktop init path
+# is unchanged.
+[target.'cfg(not(target_os = "android"))'.dependencies]
 keyring          = { workspace = true }
+
+# --- Android packaging metadata (read by `cargo-apk`) -------------------
+#
+# Pinning these values inside the repo means a contributor running
+# `cargo apk build -p solitaire_app --target x86_64-linux-android`
+# does not need to install whatever SDK version cargo-apk happens to
+# default to today. The numbers track the SDK we install in the dev
+# setup script: target SDK 34 (Android 14, current Play Store target),
+# min SDK 26 (Android 8, the lowest Bevy 0.18 supports cleanly with
+# the wgpu / GLES path).
+#
+# Asset path is `../assets` so the same directory the desktop build
+# already uses ships into the APK without copy-tree gymnastics.
+# `apk_name` keeps the output filename predictable across machines.
+[package.metadata.android]
+package = "com.solitairequest.app"
+apk_name = "solitaire-quest"
+build_targets = ["aarch64-linux-android", "armv7-linux-androideabi", "x86_64-linux-android"]
+assets = "../assets"
+# No `runtime_libs` — we don't ship any precompiled .so files,
+# the entire app is pure Rust + Bevy. cargo-apk would try to
+# resolve `runtime_libs/<arch>/` if set, and fail on a non-existent
+# arch directory under our package.
+strip = "strip"
+
+[package.metadata.android.sdk]
+target_sdk_version = 34
+min_sdk_version = 26
+
+[[package.metadata.android.uses_feature]]
+name = "android.hardware.touchscreen"
+required = true
+
+[[package.metadata.android.uses_permission]]
+name = "android.permission.INTERNET"
+
+[package.metadata.android.application]
+label = "Solitaire Quest"
+# `debuggable` defaults to false on release builds; cargo-apk flips it
+# automatically for debug profiles. Leaving the field unset keeps the
+# default behaviour.

solitaire_app/src/lib.rs

@@ -0,0 +1,281 @@
+//! Library entry point for `solitaire_app`.
+//!
+//! The app is a `cdylib + bin` hybrid: desktop builds run through the
+//! `bin` target's [`main`](crate::main_desktop) shim; Android builds
+//! load this `cdylib` via NativeActivity / GameActivity, which calls
+//! into the platform's own `main` glue. Both paths converge on
+//! [`run`], so the ECS bootstrap is single-sourced.
+//!
+//! Why split this out: cargo-apk requires the package to expose a
+//! `cdylib` library target — the Android activity dlopens
+//! `libsolitaire_app.so` and calls into it. A bin-only crate panics
+//! at build time with `Bin is not compatible with Cdylib`. The split
+//! keeps the desktop `cargo run -p solitaire_app` flow unchanged
+//! while making `cargo apk build -p solitaire_app` viable.
+
+use std::fs::OpenOptions;
+use std::io::Write;
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use bevy::prelude::*;
+use bevy::window::{
+    Monitor, MonitorSelection, PresentMode, PrimaryMonitor, PrimaryWindow, WindowPosition,
+};
+use solitaire_data::{load_settings_from, provider_for_backend, settings_file_path, Settings};
+use solitaire_engine::{
+    register_theme_asset_sources, AchievementPlugin, AnimationPlugin, AssetSourcesPlugin,
+    AudioPlugin, AutoCompletePlugin, CardAnimationPlugin, CardPlugin, ChallengePlugin,
+    CursorPlugin, DailyChallengePlugin, DiagnosticsHudPlugin, FeedbackAnimPlugin, FontPlugin,
+    GamePlugin, HelpPlugin, HomePlugin, HudPlugin, InputPlugin, LeaderboardPlugin,
+    OnboardingPlugin, PausePlugin, ProfilePlugin, ProgressPlugin, RadialMenuPlugin,
+    ReplayOverlayPlugin, ReplayPlaybackPlugin, SelectionPlugin, SettingsPlugin, SplashPlugin,
+    StatsPlugin, SyncPlugin, TablePlugin, ThemePlugin, ThemeRegistryPlugin, TimeAttackPlugin,
+    UiFocusPlugin, UiModalPlugin, UiTooltipPlugin, WeeklyGoalsPlugin, WinSummaryPlugin,
+};
+
+/// App entry point — builds and runs the Bevy app.
+///
+/// Called from both the desktop `bin` target's `main` shim and (on
+/// Android) the platform's NativeActivity / GameActivity glue.
+pub fn run() {
+    // Install a panic hook that writes a crash log next to the save files
+    // before re-running the default hook (so stderr still gets the message
+    // and any debugger attached still sees the panic).
+    install_crash_log_hook();
+
+    // Initialise the platform keyring store before any token operations.
+    // On Linux this uses the Secret Service (GNOME Keyring / KWallet); on
+    // macOS it uses the Keychain; on Windows it uses the Credential store.
+    // If the platform has no OS keyring (e.g. a headless CI box), keyring
+    // operations will fail gracefully with TokenError::KeychainUnavailable.
+    //
+    // Android: `keyring` isn't compiled in (its `rpassword` transitive
+    // pulls a libc symbol Android's bionic doesn't expose). `auth_tokens`
+    // ships an Android stub that returns KeychainUnavailable for every
+    // call — the runtime behaviour is "session login required each launch"
+    // until we wire Android Keystore via JNI in the Phase-Android round.
+    #[cfg(not(target_os = "android"))]
+    if let Err(e) = keyring::use_native_store(true) {
+        eprintln!(
+            "warn: could not initialise OS keyring ({e}); \
+             server sync login will be unavailable"
+        );
+    }
+
+    // Load settings before building the app so we can construct the right
+    // sync provider. Falls back to defaults if no settings file exists yet.
+    let settings: Settings = settings_file_path()
+        .map(|p| load_settings_from(&p))
+        .unwrap_or_default();
+    let sync_provider = provider_for_backend(&settings.sync_backend);
+
+    // Restore the previous window geometry if the player has one saved.
+    // Otherwise open at the platform default (1280×800, centred on the
+    // primary monitor) — `apply_smart_default_window_size` will resize
+    // up to a monitor-relative target on the first frame so HiDPI / 4K
+    // sessions don't end up with a comparatively tiny window.
+    let had_saved_geometry = settings.window_geometry.is_some();
+    let (window_resolution, window_position) = match settings.window_geometry {
+        Some(geom) => (
+            (geom.width, geom.height).into(),
+            WindowPosition::At(IVec2::new(geom.x, geom.y)),
+        ),
+        None => (
+            (1280u32, 800u32).into(),
+            WindowPosition::Centered(MonitorSelection::Primary),
+        ),
+    };
+
+    let mut app = App::new();
+
+    // The card-theme system's `themes://` asset source must be
+    // registered *before* `DefaultPlugins` builds `AssetPlugin`,
+    // because that plugin freezes the asset-source list at build
+    // time. The matching `AssetSourcesPlugin` (added below) finishes
+    // the wiring after `DefaultPlugins` by populating the embedded
+    // default theme into Bevy's `EmbeddedAssetRegistry`.
+    register_theme_asset_sources(&mut app);
+
+    app
+        .add_plugins(
+            DefaultPlugins
+                .set(WindowPlugin {
+                    primary_window: Some(Window {
+                        title: "Solitaire Quest".into(),
+                        // X11/Wayland WM_CLASS so taskbar managers group
+                        // multiple windows of this app correctly.
+                        name: Some("solitaire-quest".into()),
+                        resolution: window_resolution,
+                        position: window_position,
+                        // AutoNoVsync prefers Mailbox (triple-buffered) and
+                        // falls back to Immediate, eliminating the vsync stall
+                        // that AutoVsync produces during continuous window
+                        // resize on X11 / Wayland. The game's frame budget is
+                        // small enough that a few stray dropped frames from
+                        // disabling vsync are imperceptible.
+                        present_mode: PresentMode::AutoNoVsync,
+                        resize_constraints: bevy::window::WindowResizeConstraints {
+                            min_width: 800.0,
+                            min_height: 600.0,
+                            ..default()
+                        },
+                        ..default()
+                    }),
+                    ..default()
+                })
+                // The `assets/` directory lives at the workspace root, but
+                // Bevy resolves `AssetPlugin::file_path` relative to the
+                // binary package's `CARGO_MANIFEST_DIR` (`solitaire_app/`).
+                // Point one level up so `cargo run -p solitaire_app` finds
+                // card faces, backs, backgrounds, and the UI font.
+                .set(bevy::asset::AssetPlugin {
+                    file_path: "../assets".to_string(),
+                    ..default()
+                }),
+        )
+        .add_plugins(AssetSourcesPlugin)
+        .add_plugins(ThemePlugin)
+        .add_plugins(ThemeRegistryPlugin)
+        .add_plugins(FontPlugin)
+        .add_plugins(GamePlugin)
+        .add_plugins(TablePlugin)
+        .add_plugins(CardPlugin)
+        .add_plugins(CursorPlugin)
+        .add_plugins(InputPlugin)
+        .add_plugins(RadialMenuPlugin)
+        .add_plugins(SelectionPlugin)
+        .add_plugins(AnimationPlugin)
+        .add_plugins(FeedbackAnimPlugin)
+        .add_plugins(CardAnimationPlugin)
+        .add_plugins(AutoCompletePlugin)
+        .add_plugins(ReplayPlaybackPlugin)
+        .add_plugins(ReplayOverlayPlugin)
+        .add_plugins(StatsPlugin::default())
+        .add_plugins(ProgressPlugin::default())
+        .add_plugins(AchievementPlugin::default())
+        .add_plugins(DailyChallengePlugin)
+        .add_plugins(WeeklyGoalsPlugin)
+        .add_plugins(ChallengePlugin)
+        .add_plugins(TimeAttackPlugin)
+        .add_plugins(HudPlugin)
+        .add_plugins(HelpPlugin)
+        .add_plugins(HomePlugin::default())
+        .add_plugins(ProfilePlugin)
+        .add_plugins(PausePlugin)
+        .add_plugins(SettingsPlugin::default())
+        .add_plugins(AudioPlugin)
+        .add_plugins(OnboardingPlugin)
+        .add_plugins(SyncPlugin::new(sync_provider))
+        .add_plugins(LeaderboardPlugin)
+        .add_plugins(WinSummaryPlugin)
+        .add_plugins(UiModalPlugin)
+        .add_plugins(UiFocusPlugin)
+        .add_plugins(UiTooltipPlugin)
+        .add_plugins(SplashPlugin)
+        .add_plugins(DiagnosticsHudPlugin);
+
+    // Smart default window sizing: when no saved geometry was loaded,
+    // resize the freshly-opened 1280×800 window to ~70 % of the primary
+    // monitor's logical size on the first frame. Without this, a 4K
+    // monitor opens the same 1280×800 window that a 1080p monitor
+    // does — visually tiny relative to screen. Skipped entirely when
+    // saved geometry was applied; the player's preference always wins.
+    //
+    // Players who specifically want the literal 1280×800 baseline on
+    // every fresh launch can flip `disable_smart_default_size` in
+    // Settings to opt out. The flag is checked once at startup; a
+    // mid-session change applies on the next launch.
+    if !had_saved_geometry && !settings.disable_smart_default_size {
+        app.add_systems(Update, apply_smart_default_window_size);
+    }
+
+    app.run();
+}
+
+/// One-shot Update system that runs only on launches without saved
+/// window geometry. Resizes the primary window to a fraction of the
+/// primary monitor's *logical* size — bigger monitors get bigger
+/// windows automatically. Logical size already accounts for the OS's
+/// HiDPI scale factor, so a 2880×1800 Retina display reporting
+/// scale_factor 2.0 yields a 1440×900 logical size and a 1008×630
+/// target window — same physical inches as a 1920×1080 monitor with
+/// scale_factor 1.0 yielding 1344×756.
+///
+/// Uses `Local<bool>` to make itself one-shot rather than introducing
+/// a dedicated resource. The Update tick is necessary because Bevy
+/// populates the `Monitor` entities asynchronously after winit's
+/// Resumed event fires; they may not exist on the first Startup pass.
+fn apply_smart_default_window_size(
+    mut applied: Local<bool>,
+    monitors: Query<&Monitor, With<PrimaryMonitor>>,
+    mut windows: Query<&mut Window, With<PrimaryWindow>>,
+) {
+    if *applied {
+        return;
+    }
+    let Ok(monitor) = monitors.single() else {
+        // Primary monitor not yet spawned by bevy_winit. Try again
+        // next frame; the cost is one early-exit per tick until
+        // monitors arrive (typically frame 1 or 2).
+        return;
+    };
+    let Ok(mut window) = windows.single_mut() else {
+        return;
+    };
+
+    let scale = monitor.scale_factor as f32;
+    if scale <= 0.0 {
+        // Defensive: a zero or negative scale factor would NaN the
+        // arithmetic below. Bail and accept the default size.
+        *applied = true;
+        return;
+    }
+    let logical_w = monitor.physical_width as f32 / scale;
+    let logical_h = monitor.physical_height as f32 / scale;
+
+    // Target 70 % of monitor in each dimension, clamped to the
+    // existing 800×600 minimum and the monitor's own logical size
+    // (so we never request a window larger than the screen).
+    let target_w = (logical_w * 0.7).clamp(800.0, logical_w);
+    let target_h = (logical_h * 0.7).clamp(600.0, logical_h);
+
+    // Resize only when the change is meaningful — at exactly 1280×800
+    // on a 1920×1080 monitor the new target is 1344×756 (only ~5 %
+    // wider), worth the resize; at the same default on an 800×600
+    // monitor the clamp pins us at 800×600 and we shouldn't resize.
+    let curr_w = window.resolution.width();
+    let curr_h = window.resolution.height();
+    if (curr_w - target_w).abs() > 8.0 || (curr_h - target_h).abs() > 8.0 {
+        window.resolution.set(target_w, target_h);
+    }
+    *applied = true;
+}
+
+/// Wraps the default panic hook with one that also appends a crash log
+/// to `<data_dir>/crash.log` (next to `settings.json`). The default hook
+/// still runs afterwards, so stderr output and debugger integration are
+/// unchanged. If the data directory is unavailable, the wrapper silently
+/// falls through — the default hook handles output either way.
+fn install_crash_log_hook() {
+    let crash_log_path = settings_file_path().and_then(|p| {
+        p.parent()
+            .map(|parent| parent.join("crash.log"))
+    });
+    let default_hook = std::panic::take_hook();
+    std::panic::set_hook(Box::new(move |info| {
+        if let Some(path) = crash_log_path.as_ref()
+            && let Ok(mut file) = OpenOptions::new()
+                .create(true)
+                .append(true)
+                .open(path)
+        {
+            // Plain unix-seconds timestamp keeps the format trivially
+            // parseable and avoids pulling in chrono just for this.
+            let secs = SystemTime::now()
+                .duration_since(UNIX_EPOCH)
+                .map_or(0, |d| d.as_secs());
+            let _ = writeln!(file, "----- t={secs} -----\n{info}\n");
+        }
+        default_hook(info);
+    }));
+}

solitaire_app/src/main.rs

@@ -1,172 +1,9 @@
-use std::fs::OpenOptions;
+//! Desktop entry point for `solitaire_app`.
-use std::io::Write;
+//!
-use std::time::{SystemTime, UNIX_EPOCH};
+//! The body of the app lives in `lib.rs` so cargo-apk can package the
-
+//! same code into an Android `cdylib`. This shim is the desktop /
-use bevy::prelude::*;
+//! `cargo run` path — it just delegates to [`solitaire_app::run`].
-use bevy::window::{MonitorSelection, PresentMode, WindowPosition};
-use solitaire_data::{load_settings_from, provider_for_backend, settings_file_path, Settings};
-use solitaire_engine::{
-    register_theme_asset_sources, AchievementPlugin, AnimationPlugin, AssetSourcesPlugin,
-    AudioPlugin, AutoCompletePlugin, CardAnimationPlugin, CardPlugin, ChallengePlugin,
-    CursorPlugin, DailyChallengePlugin, FeedbackAnimPlugin, FontPlugin, GamePlugin, HelpPlugin,
-    HomePlugin, HudPlugin, InputPlugin, LeaderboardPlugin, OnboardingPlugin, PausePlugin,
-    ProfilePlugin, ProgressPlugin, RadialMenuPlugin, SelectionPlugin, SettingsPlugin, SplashPlugin,
-    StatsPlugin, SyncPlugin, TablePlugin, ThemePlugin, ThemeRegistryPlugin, TimeAttackPlugin,
-    UiFocusPlugin, UiModalPlugin, UiTooltipPlugin, WeeklyGoalsPlugin, WinSummaryPlugin,
-};
 
 fn main() {
-    // Install a panic hook that writes a crash log next to the save files
+    solitaire_app::run();
-    // before re-running the default hook (so stderr still gets the message
-    // and any debugger attached still sees the panic).
-    install_crash_log_hook();
-
-    // Initialise the platform keyring store before any token operations.
-    // On Linux this uses the Secret Service (GNOME Keyring / KWallet); on
-    // macOS it uses the Keychain; on Windows it uses the Credential store.
-    // If the platform has no OS keyring (e.g. a headless CI box), keyring
-    // operations will fail gracefully with TokenError::KeychainUnavailable.
-    if let Err(e) = keyring::use_native_store(true) {
-        eprintln!(
-            "warn: could not initialise OS keyring ({e}); \
-             server sync login will be unavailable"
-        );
-    }
-
-    // Load settings before building the app so we can construct the right
-    // sync provider. Falls back to defaults if no settings file exists yet.
-    let settings: Settings = settings_file_path()
-        .map(|p| load_settings_from(&p))
-        .unwrap_or_default();
-    let sync_provider = provider_for_backend(&settings.sync_backend);
-
-    // Restore the previous window geometry if the player has one saved.
-    // Otherwise open at the platform default (1280×800, centred on the
-    // primary monitor). The window_geometry field is None on first run
-    // and after upgrading from a build that didn't persist geometry.
-    let (window_resolution, window_position) = match settings.window_geometry {
-        Some(geom) => (
-            (geom.width, geom.height).into(),
-            WindowPosition::At(IVec2::new(geom.x, geom.y)),
-        ),
-        None => (
-            (1280u32, 800u32).into(),
-            WindowPosition::Centered(MonitorSelection::Primary),
-        ),
-    };
-
-    let mut app = App::new();
-
-    // The card-theme system's `themes://` asset source must be
-    // registered *before* `DefaultPlugins` builds `AssetPlugin`,
-    // because that plugin freezes the asset-source list at build
-    // time. The matching `AssetSourcesPlugin` (added below) finishes
-    // the wiring after `DefaultPlugins` by populating the embedded
-    // default theme into Bevy's `EmbeddedAssetRegistry`.
-    register_theme_asset_sources(&mut app);
-
-    app
-        .add_plugins(
-            DefaultPlugins
-                .set(WindowPlugin {
-                    primary_window: Some(Window {
-                        title: "Solitaire Quest".into(),
-                        // X11/Wayland WM_CLASS so taskbar managers group
-                        // multiple windows of this app correctly.
-                        name: Some("solitaire-quest".into()),
-                        resolution: window_resolution,
-                        position: window_position,
-                        // AutoNoVsync prefers Mailbox (triple-buffered) and
-                        // falls back to Immediate, eliminating the vsync stall
-                        // that AutoVsync produces during continuous window
-                        // resize on X11 / Wayland. The game's frame budget is
-                        // small enough that a few stray dropped frames from
-                        // disabling vsync are imperceptible.
-                        present_mode: PresentMode::AutoNoVsync,
-                        resize_constraints: bevy::window::WindowResizeConstraints {
-                            min_width: 800.0,
-                            min_height: 600.0,
-                            ..default()
-                        },
-                        ..default()
-                    }),
-                    ..default()
-                })
-                // The `assets/` directory lives at the workspace root, but
-                // Bevy resolves `AssetPlugin::file_path` relative to the
-                // binary package's `CARGO_MANIFEST_DIR` (`solitaire_app/`).
-                // Point one level up so `cargo run -p solitaire_app` finds
-                // card faces, backs, backgrounds, and the UI font.
-                .set(bevy::asset::AssetPlugin {
-                    file_path: "../assets".to_string(),
-                    ..default()
-                }),
-        )
-        .add_plugins(AssetSourcesPlugin)
-        .add_plugins(ThemePlugin)
-        .add_plugins(ThemeRegistryPlugin)
-        .add_plugins(FontPlugin)
-        .add_plugins(GamePlugin)
-        .add_plugins(TablePlugin)
-        .add_plugins(CardPlugin)
-        .add_plugins(CursorPlugin)
-        .add_plugins(InputPlugin)
-        .add_plugins(RadialMenuPlugin)
-        .add_plugins(SelectionPlugin)
-        .add_plugins(AnimationPlugin)
-        .add_plugins(FeedbackAnimPlugin)
-        .add_plugins(CardAnimationPlugin)
-        .add_plugins(AutoCompletePlugin)
-        .add_plugins(StatsPlugin::default())
-        .add_plugins(ProgressPlugin::default())
-        .add_plugins(AchievementPlugin::default())
-        .add_plugins(DailyChallengePlugin)
-        .add_plugins(WeeklyGoalsPlugin)
-        .add_plugins(ChallengePlugin)
-        .add_plugins(TimeAttackPlugin)
-        .add_plugins(HudPlugin)
-        .add_plugins(HelpPlugin)
-        .add_plugins(HomePlugin)
-        .add_plugins(ProfilePlugin)
-        .add_plugins(PausePlugin)
-        .add_plugins(SettingsPlugin::default())
-        .add_plugins(AudioPlugin)
-        .add_plugins(OnboardingPlugin)
-        .add_plugins(SyncPlugin::new(sync_provider))
-        .add_plugins(LeaderboardPlugin)
-        .add_plugins(WinSummaryPlugin)
-        .add_plugins(UiModalPlugin)
-        .add_plugins(UiFocusPlugin)
-        .add_plugins(UiTooltipPlugin)
-        .add_plugins(SplashPlugin)
-        .run();
-}
-
-/// Wraps the default panic hook with one that also appends a crash log
-/// to `<data_dir>/crash.log` (next to `settings.json`). The default hook
-/// still runs afterwards, so stderr output and debugger integration are
-/// unchanged. If the data directory is unavailable, the wrapper silently
-/// falls through — the default hook handles output either way.
-fn install_crash_log_hook() {
-    let crash_log_path = settings_file_path().and_then(|p| {
-        p.parent()
-            .map(|parent| parent.join("crash.log"))
-    });
-    let default_hook = std::panic::take_hook();
-    std::panic::set_hook(Box::new(move |info| {
-        if let Some(path) = crash_log_path.as_ref()
-            && let Ok(mut file) = OpenOptions::new()
-                .create(true)
-                .append(true)
-                .open(path)
-        {
-            // Plain unix-seconds timestamp keeps the format trivially
-            // parseable and avoids pulling in chrono just for this.
-            let secs = SystemTime::now()
-                .duration_since(UNIX_EPOCH)
-                .map_or(0, |d| d.as_secs());
-            let _ = writeln!(file, "----- t={secs} -----\n{info}\n");
-        }
-        default_hook(info);
-    }));
 }

solitaire_core/src/achievement.rs

@@ -140,6 +140,16 @@ fn comeback(c: &AchievementContext) -> bool {
 fn zen_winner(c: &AchievementContext) -> bool {
     c.last_win_is_zen
 }
+/// Cinephile is event-driven: it unlocks when the engine observes a
+/// `ReplayPlaybackState` transition from `Playing` to `Completed`, not on
+/// any field of [`AchievementContext`]. The condition predicate therefore
+/// always returns false so [`check_achievements`] never unlocks it from a
+/// `GameWonEvent` / `StateChangedEvent` cycle — the unlock is driven by
+/// `AchievementUnlockedEvent` written directly from the engine's
+/// replay-playback observer.
+fn cinephile_never(_c: &AchievementContext) -> bool {
+    false
+}
 
 /// All currently-evaluable achievements. Order is stable so persistence files
 /// remain readable across versions (new achievements append).
@@ -288,6 +298,18 @@ pub const ALL_ACHIEVEMENTS: &[AchievementDef] = &[
         reward: Some(Reward::Badge),
         condition: zen_winner,
     },
+    AchievementDef {
+        id: "cinephile",
+        name: "Cinephile",
+        description: "Watch a saved replay all the way through",
+        secret: false,
+        reward: None,
+        // Event-driven unlock: the engine's replay-playback observer fires
+        // `AchievementUnlockedEvent("cinephile")` directly on a Playing →
+        // Completed transition. `cinephile_never` keeps the condition path
+        // a no-op so a `GameWonEvent` evaluation cycle cannot unlock it.
+        condition: cinephile_never,
+    },
 ];
 
 /// Return every `AchievementDef` whose condition is satisfied by `ctx`.
@@ -721,6 +743,31 @@ mod tests {
         assert!(ids.contains(&"no_undo"), "no_undo must also unlock when perfectionist does");
     }
 
+    #[test]
+    fn cinephile_achievement_in_canonical_list() {
+        let def = achievement_by_id("cinephile").expect("cinephile must be registered");
+        assert_eq!(def.id, "cinephile");
+        assert_eq!(def.name, "Cinephile");
+        assert!(!def.secret, "cinephile is not a secret achievement");
+        // Event-driven: the predicate is a sentinel that always returns
+        // false. `check_achievements` must never unlock cinephile from a
+        // GameWonEvent context, even one that satisfies every other gate.
+        let mut c = ctx();
+        c.games_won = 1;
+        c.win_streak_current = 999;
+        c.last_win_time_seconds = 1;
+        c.last_win_used_undo = false;
+        c.best_single_score = 99_999;
+        c.lifetime_score = u64::MAX;
+        c.last_win_is_zen = true;
+        c.last_win_recycle_count = 99;
+        let ids: Vec<&str> = check_achievements(&c).iter().map(|d| d.id).collect();
+        assert!(
+            !ids.contains(&"cinephile"),
+            "cinephile must never unlock via condition evaluation; got {ids:?}",
+        );
+    }
+
     #[test]
     fn perfectionist_score_well_above_threshold_still_passes() {
         let mut c = ctx();

solitaire_core/src/card.rs

@@ -77,16 +77,6 @@ pub struct Card {
 mod tests {
     use super::*;
 
-    #[test]
-    fn rank_value_ace_is_one() {
-        assert_eq!(Rank::Ace.value(), 1);
-    }
-
-    #[test]
-    fn rank_value_king_is_thirteen() {
-        assert_eq!(Rank::King.value(), 13);
-    }
-
     #[test]
     fn rank_values_are_sequential() {
         let ranks = [
@@ -100,26 +90,11 @@ mod tests {
     }
 
     #[test]
-    fn suit_red_is_diamonds_and_hearts() {
+    fn suit_red_and_black_are_complementary() {
-        assert!(Suit::Diamonds.is_red());
+        for suit in [Suit::Clubs, Suit::Diamonds, Suit::Hearts, Suit::Spades] {
-        assert!(Suit::Hearts.is_red());
+            assert_ne!(suit.is_red(), suit.is_black(), "{suit:?} must be exactly one of red/black");
-        assert!(!Suit::Clubs.is_red());
-        assert!(!Suit::Spades.is_red());
         }
-
+        assert!(Suit::Diamonds.is_red() && Suit::Hearts.is_red());
-    #[test]
+        assert!(Suit::Clubs.is_black() && Suit::Spades.is_black());
-    fn suit_black_is_clubs_and_spades() {
-        assert!(Suit::Clubs.is_black());
-        assert!(Suit::Spades.is_black());
-        assert!(!Suit::Diamonds.is_black());
-        assert!(!Suit::Hearts.is_black());
-    }
-
-    #[test]
-    fn card_face_up_field_reflects_construction() {
-        let card = Card { id: 0, suit: Suit::Hearts, rank: Rank::Ace, face_up: false };
-        assert!(!card.face_up);
-        let card2 = Card { id: 1, suit: Suit::Spades, rank: Rank::King, face_up: true };
-        assert!(card2.face_up);
     }
 }

solitaire_core/src/game_state.rs

@@ -4,7 +4,7 @@ use crate::card::Card;
 use crate::deck::{deal_klondike, Deck};
 use crate::error::MoveError;
 use crate::pile::{Pile, PileType};
-use crate::rules::{can_place_on_foundation, can_place_on_tableau};
+use crate::rules::{can_place_on_foundation, can_place_on_tableau, is_valid_tableau_sequence};
 use crate::scoring::{compute_time_bonus as scoring_time_bonus, score_move, score_undo as scoring_undo};
 
 const MAX_UNDO_STACK: usize = 64;
@@ -283,6 +283,18 @@ impl GameState {
                     if !can_place_on_tableau(&bottom_card, dest) {
                         return Err(MoveError::RuleViolation("invalid tableau placement".into()));
                     }
+                    // The previous check only validates that the *bottom* of the
+                    // moved stack lands on the destination's top card. Without
+                    // this guard, a player could lift an arbitrary multi-card
+                    // selection from one column and drop it onto another whenever
+                    // the bottom card happens to match — even if the cards
+                    // above the bottom don't form a legal descending
+                    // alternating-colour run.
+                    if !is_valid_tableau_sequence(&from_pile.cards[start..]) {
+                        return Err(MoveError::RuleViolation(
+                            "moved cards must form a valid tableau run".into(),
+                        ));
+                    }
                 }
                 _ => return Err(MoveError::InvalidDestination),
             }
@@ -803,11 +815,6 @@ mod tests {
         assert!(g.undo_stack_len() <= 64);
     }
 
-    #[test]
-    fn undo_count_starts_at_zero() {
-        assert_eq!(new_game().undo_count, 0);
-    }
-
     #[test]
     fn undo_count_increments_on_each_undo() {
         let mut g = new_game();
@@ -888,11 +895,6 @@ mod tests {
         assert_eq!(g.score, 0);
     }
 
-    #[test]
-    fn zen_mode_default_is_classic_via_default_trait() {
-        assert_eq!(GameMode::default(), GameMode::Classic);
-    }
-
     #[test]
     fn zen_mode_field_persists_through_construction() {
         let g = GameState::new_with_mode(1, DrawMode::DrawThree, GameMode::Zen);
@@ -944,12 +946,6 @@ mod tests {
         assert!(g.undo().is_ok(), "undo must be permitted in TimeAttack mode");
     }
 
-    #[test]
-    fn time_attack_score_starts_at_zero() {
-        let g = GameState::new_with_mode(42, DrawMode::DrawOne, GameMode::TimeAttack);
-        assert_eq!(g.score, 0);
-    }
-
     #[test]
     fn time_attack_draw_three_combination() {
         // TimeAttack + DrawThree is a valid combination; verify construction.

solitaire_core/src/lib.rs

@@ -6,3 +6,4 @@ pub mod game_state;
 pub mod pile;
 pub mod rules;
 pub mod scoring;
+pub mod solver;

solitaire_core/src/rules.rs

@@ -30,6 +30,18 @@ pub fn can_place_on_tableau(card: &Card, pile: &Pile) -> bool {
     }
 }
 
+/// Returns `true` if `cards` is a legal tableau run on its own — every
+/// adjacent pair descends by one rank and alternates colour. A single
+/// card is trivially valid. The destination check is separate; this
+/// only validates the sequence's *internal* structure, which the tableau
+/// move path must enforce so a player can't smuggle an arbitrary stack
+/// onto another column when the bottom card happens to land legally.
+pub fn is_valid_tableau_sequence(cards: &[Card]) -> bool {
+    cards.windows(2).all(|w| {
+        w[0].rank.value() == w[1].rank.value() + 1 && w[0].suit.is_red() != w[1].suit.is_red()
+    })
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -174,4 +186,26 @@ mod tests {
         let p = pile_with(PileType::Tableau(0), vec![top]);
         assert!(!can_place_on_tableau(&c, &p));
     }
+
+    #[test]
+    fn tableau_sequence_validation() {
+        // Single card is trivially a valid sequence.
+        assert!(is_valid_tableau_sequence(&[card(Suit::Hearts, Rank::Five)]));
+        // Valid descending alternating-colour run K♠ Q♥ J♣.
+        assert!(is_valid_tableau_sequence(&[
+            card(Suit::Spades, Rank::King),
+            card(Suit::Hearts, Rank::Queen),
+            card(Suit::Clubs, Rank::Jack),
+        ]));
+        // Same colour twice (Q♠ on K♠) — invalid.
+        assert!(!is_valid_tableau_sequence(&[
+            card(Suit::Spades, Rank::King),
+            card(Suit::Spades, Rank::Queen),
+        ]));
+        // Rank gap (K♠ → J♥) — invalid.
+        assert!(!is_valid_tableau_sequence(&[
+            card(Suit::Spades, Rank::King),
+            card(Suit::Hearts, Rank::Jack),
+        ]));
+    }
 }

solitaire_data/Cargo.toml

@@ -13,10 +13,19 @@ chrono         = { workspace = true }
 thiserror      = { workspace = true }
 async-trait    = { workspace = true }
 dirs           = { workspace = true }
-keyring-core   = { workspace = true }
 reqwest        = { workspace = true }
 tokio          = { workspace = true }
 
+# `keyring-core` is the typed Entry/Error API used by
+# `auth_tokens`. The crate's own dependency tree pulls in
+# `rpassword` which uses `libc::__errno_location` — a symbol the
+# Android NDK doesn't expose (`__errno` lives at a different path
+# on bionic). On Android `auth_tokens` falls back to a stub
+# implementation that always returns `KeychainUnavailable`; the
+# real backend lands when we wire Android Keystore via JNI.
+[target.'cfg(not(target_os = "android"))'.dependencies]
+keyring-core   = { workspace = true }
+
 [dev-dependencies]
 solitaire_server = { path = "../solitaire_server" }
 solitaire_sync   = { workspace = true }

solitaire_data/src/achievements.rs

@@ -15,7 +15,7 @@ const FILE_NAME: &str = "achievements.json";
 
 /// Platform-specific default path for `achievements.json`.
 pub fn achievements_file_path() -> Option<PathBuf> {
-    dirs::data_dir().map(|d| d.join(APP_DIR_NAME).join(FILE_NAME))
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(FILE_NAME))
 }
 
 /// Load achievements from an explicit path. Returns `Vec::new()` if the file

solitaire_data/src/auth_tokens.rs

@@ -14,8 +14,19 @@
 //! the Bevy `App`). If no default store is set, all operations in this module
 //! will return [`TokenError::KeychainUnavailable`].
 //!
+//! # Android stub
+//!
+//! `keyring-core` cannot compile for the android target (its `rpassword`
+//! transitive dep uses `libc::__errno_location`, which Android's bionic
+//! doesn't expose). On Android every function in this module returns
+//! [`TokenError::KeychainUnavailable`] so callers can detect the fallback
+//! the same way they handle a Linux box without Secret Service. The
+//! real Android backend will arrive in the Phase-Android round when we
+//! wire Android Keystore via JNI.
+//!
 //! # Note: no unit tests — requires live OS keychain.
 
+#[cfg(not(target_os = "android"))]
 use keyring_core::Entry;
 use thiserror::Error;
 
@@ -34,9 +45,11 @@ pub enum TokenError {
 }
 
 /// Service name used to namespace all keychain entries for this application.
+#[cfg(not(target_os = "android"))]
 const SERVICE: &str = "solitaire_quest_server";
 
 /// Map a `keyring_core::Error` to the appropriate `TokenError`.
+#[cfg(not(target_os = "android"))]
 fn map_keyring_err(err: keyring_core::Error, username: &str) -> TokenError {
     let msg = err.to_string();
     match err {
@@ -51,6 +64,7 @@ fn map_keyring_err(err: keyring_core::Error, username: &str) -> TokenError {
 /// Store the access and refresh tokens for `username` in the OS keychain.
 ///
 /// Any previously stored tokens for that username are overwritten.
+#[cfg(not(target_os = "android"))]
 pub fn store_tokens(
     username: &str,
     access_token: &str,
@@ -72,6 +86,7 @@ pub fn store_tokens(
 /// Load the stored access token for `username` from the OS keychain.
 ///
 /// Returns [`TokenError::NotFound`] if no token has been stored yet.
+#[cfg(not(target_os = "android"))]
 pub fn load_access_token(username: &str) -> Result<String, TokenError> {
     Entry::new(SERVICE, &format!("{username}_access"))
         .map_err(|e| map_keyring_err(e, username))?
@@ -82,6 +97,7 @@ pub fn load_access_token(username: &str) -> Result<String, TokenError> {
 /// Load the stored refresh token for `username` from the OS keychain.
 ///
 /// Returns [`TokenError::NotFound`] if no token has been stored yet.
+#[cfg(not(target_os = "android"))]
 pub fn load_refresh_token(username: &str) -> Result<String, TokenError> {
     Entry::new(SERVICE, &format!("{username}_refresh"))
         .map_err(|e| map_keyring_err(e, username))?
@@ -93,6 +109,7 @@ pub fn load_refresh_token(username: &str) -> Result<String, TokenError> {
 ///
 /// Intended to be called on logout or account deletion. Missing entries are
 /// silently ignored (the tokens are already gone, which is the desired state).
+#[cfg(not(target_os = "android"))]
 pub fn delete_tokens(username: &str) -> Result<(), TokenError> {
     match Entry::new(SERVICE, &format!("{username}_access"))
         .map_err(|e| map_keyring_err(e, username))?
@@ -112,3 +129,37 @@ pub fn delete_tokens(username: &str) -> Result<(), TokenError> {
 
     Ok(())
 }
+
+// -------------------------------------------------------------------
+// Android stub — same public API, always returns KeychainUnavailable.
+// Lets `sync_client::*` compile unchanged on Android; the runtime
+// effect is "session login required every launch", same as a Linux
+// box without Secret Service.
+// -------------------------------------------------------------------
+
+#[cfg(target_os = "android")]
+const ANDROID_STUB_MSG: &str = "android stub: keychain not yet wired (Phase-Android task)";
+
+#[cfg(target_os = "android")]
+pub fn store_tokens(
+    _username: &str,
+    _access_token: &str,
+    _refresh_token: &str,
+) -> Result<(), TokenError> {
+    Err(TokenError::KeychainUnavailable(ANDROID_STUB_MSG.to_string()))
+}
+
+#[cfg(target_os = "android")]
+pub fn load_access_token(_username: &str) -> Result<String, TokenError> {
+    Err(TokenError::KeychainUnavailable(ANDROID_STUB_MSG.to_string()))
+}
+
+#[cfg(target_os = "android")]
+pub fn load_refresh_token(_username: &str) -> Result<String, TokenError> {
+    Err(TokenError::KeychainUnavailable(ANDROID_STUB_MSG.to_string()))
+}
+
+#[cfg(target_os = "android")]
+pub fn delete_tokens(_username: &str) -> Result<(), TokenError> {
+    Err(TokenError::KeychainUnavailable(ANDROID_STUB_MSG.to_string()))
+}

solitaire_data/src/challenge.rs

@@ -90,9 +90,4 @@ mod tests {
         seeds.dedup();
         assert_eq!(seeds.len(), len_before);
     }
-
-    #[test]
-    fn challenge_count_matches_seed_list_length() {
-        assert_eq!(challenge_count() as usize, CHALLENGE_SEEDS.len());
-    }
 }

solitaire_data/src/lib.rs

@@ -56,6 +56,15 @@ pub trait SyncProvider: Send + Sync {
     async fn delete_account(&self) -> Result<(), SyncError> {
         Ok(())
     }
+    /// Upload a winning replay to the backend. On success, returns the
+    /// shareable web URL the player can copy to their clipboard
+    /// (`<server>/replays/<id>`). Default returns `UnsupportedPlatform`
+    /// so backends without a server (e.g. `LocalOnlyProvider`) are
+    /// silently no-op'd by the engine's push-on-win system, matching
+    /// the same pattern `pull` / `push` follow.
+    async fn push_replay(&self, _replay: &crate::replay::Replay) -> Result<String, SyncError> {
+        Err(SyncError::UnsupportedPlatform)
+    }
 }
 
 /// Blanket impl so `Box<dyn SyncProvider + Send + Sync>` (returned by
@@ -92,6 +101,9 @@ impl SyncProvider for Box<dyn SyncProvider + Send + Sync> {
     async fn delete_account(&self) -> Result<(), SyncError> {
         (**self).delete_account().await
     }
+    async fn push_replay(&self, replay: &crate::replay::Replay) -> Result<String, SyncError> {
+        (**self).push_replay(replay).await
+    }
 }
 
 pub mod stats;
@@ -99,8 +111,11 @@ pub use stats::{StatsExt, StatsSnapshot};
 
 pub mod storage;
 pub use storage::{
-    cleanup_orphaned_tmp_files, delete_game_state_at, game_state_file_path, load_game_state_from,
+    cleanup_orphaned_tmp_files, delete_game_state_at, delete_time_attack_session_at,
-    load_stats, load_stats_from, save_game_state_to, save_stats, save_stats_to, stats_file_path,
+    game_state_file_path, load_game_state_from, load_stats, load_stats_from,
+    load_time_attack_session_from, load_time_attack_session_from_at, save_game_state_to,
+    save_stats, save_stats_to, save_time_attack_session_to, stats_file_path,
+    time_attack_session_path, time_attack_session_with_now, TimeAttackSession,
 };
 
 pub mod achievements;
@@ -126,7 +141,10 @@ pub use challenge::{challenge_count, challenge_seed_for, CHALLENGE_SEEDS};
 pub mod settings;
 pub use settings::{
     load_settings_from, save_settings_to, settings_file_path, AnimSpeed, Settings, SyncBackend,
-    Theme, WindowGeometry, TOOLTIP_DELAY_MAX_SECS, TOOLTIP_DELAY_MIN_SECS, TOOLTIP_DELAY_STEP_SECS,
+    Theme, WindowGeometry, REPLAY_MOVE_INTERVAL_MAX_SECS, REPLAY_MOVE_INTERVAL_MIN_SECS,
+    REPLAY_MOVE_INTERVAL_STEP_SECS, SOLVER_DEAL_RETRY_CAP, TIME_BONUS_MULTIPLIER_MAX,
+    TIME_BONUS_MULTIPLIER_MIN, TIME_BONUS_MULTIPLIER_STEP, TOOLTIP_DELAY_MAX_SECS,
+    TOOLTIP_DELAY_MIN_SECS, TOOLTIP_DELAY_STEP_SECS,
 };
 
 pub mod auth_tokens;
@@ -136,3 +154,15 @@ pub use auth_tokens::{
 
 pub mod sync_client;
 pub use sync_client::{provider_for_backend, LocalOnlyProvider, SolitaireServerClient};
+
+pub mod replay;
+#[allow(deprecated)]
+pub use replay::{latest_replay_path, load_latest_replay_from, save_latest_replay_to};
+pub use replay::{
+    append_replay_to_history, load_replay_history_from, migrate_legacy_latest_replay,
+    replay_history_path, save_replay_history_to, Replay, ReplayHistory, ReplayMove,
+    REPLAY_HISTORY_CAP, REPLAY_HISTORY_SCHEMA_VERSION, REPLAY_SCHEMA_VERSION,
+};
+
+pub mod platform;
+pub use platform::data_dir;

solitaire_data/src/platform.rs

@@ -0,0 +1,92 @@
+//! Per-platform resolution of the per-user data directory.
+//!
+//! The rest of `solitaire_data` (settings, stats, achievements,
+//! replays, progress, game state) and the engine's user-themes
+//! discovery all need a base path under which to nest
+//! `solitaire_quest/<file>`. On desktop the right answer is
+//! `dirs::data_dir()` (which resolves to platform-appropriate
+//! locations: `~/.local/share` on Linux, `~/Library/Application
+//! Support` on macOS, `%APPDATA%` on Windows). On Android the
+//! `dirs` crate returns `None`, which would silently disable
+//! every persistence path — settings, stats, replays, the lot.
+//!
+//! [`data_dir`] is a thin shim that returns the right base path
+//! per target. Callers continue to append
+//! `solitaire_quest/<file>` themselves, so the on-disk layout is
+//! identical across platforms (the per-app Android sandbox makes
+//! the extra `solitaire_quest/` segment harmless, and a `tar`
+//! export from one platform deserialises cleanly on another).
+//!
+//! # Why hardcode on Android?
+//!
+//! The "proper" Android answer is JNI: call back into Java to
+//! invoke `Activity.getFilesDir()`. That requires plumbing an
+//! `AndroidApp` context through Bevy's startup hooks and a
+//! per-call JNI bridge — meaningfully more code than the
+//! sandbox-guaranteed `/data/data/<package>/files` path. The
+//! package name `com.solitairequest.app` is fixed at compile
+//! time in `solitaire_app/Cargo.toml`'s
+//! `[package.metadata.android]` block, so a hardcoded path is
+//! safe until that ever changes (at which point this constant
+//! moves with it).
+
+use std::path::PathBuf;
+
+/// Hardcoded per-app private files directory on Android.
+///
+/// Matches `[package.metadata.android]` in `solitaire_app/Cargo.toml`.
+/// The Android sandbox guarantees this path exists, is writable,
+/// and is private to the app — no JNI needed. Update both this
+/// constant and the Cargo metadata together if the package id
+/// ever changes.
+#[cfg(target_os = "android")]
+const ANDROID_APP_FILES_DIR: &str = "/data/data/com.solitairequest.app/files";
+
+/// Returns the per-user data directory for the current target,
+/// or `None` if the platform doesn't expose one (rare; usually
+/// indicates a broken `$HOME` or `$XDG_*` configuration on a
+/// minimal Linux container).
+///
+/// Callers append `solitaire_quest/<file>` themselves. See the
+/// module-level doc comment for the per-platform behaviour and
+/// why Android uses a hardcoded path.
+pub fn data_dir() -> Option<PathBuf> {
+    #[cfg(target_os = "android")]
+    {
+        Some(PathBuf::from(ANDROID_APP_FILES_DIR))
+    }
+    #[cfg(not(target_os = "android"))]
+    {
+        dirs::data_dir()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// On every supported desktop target the OS reports a usable
+    /// data directory. This test only runs on desktop because the
+    /// Android branch returns a fixed string regardless of host
+    /// state, and asserting on a fixed string is a tautology.
+    #[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
+    #[test]
+    fn data_dir_returns_some_on_desktop_targets() {
+        let dir = data_dir().expect("desktop targets must report a data dir");
+        assert!(
+            dir.is_absolute(),
+            "data_dir() must return an absolute path on desktop, got {dir:?}",
+        );
+    }
+
+    /// On Android the hardcoded path matches the package id pinned
+    /// in `solitaire_app/Cargo.toml`'s `[package.metadata.android]`.
+    /// If a future change rotates that id, this test fails loudly
+    /// so the path constant moves with it.
+    #[cfg(target_os = "android")]
+    #[test]
+    fn data_dir_returns_sandbox_path_on_android() {
+        let dir = data_dir().expect("android must report a data dir");
+        assert_eq!(dir, PathBuf::from("/data/data/com.solitairequest.app/files"));
+    }
+}

solitaire_data/src/progress.rs

@@ -46,7 +46,7 @@ pub fn xp_for_win(time_seconds: u64, used_undo: bool) -> u64 {
 
 /// Platform-specific default path for `progress.json`.
 pub fn progress_file_path() -> Option<PathBuf> {
-    dirs::data_dir().map(|d| d.join(APP_DIR_NAME).join(FILE_NAME))
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(FILE_NAME))
 }
 
 /// Load progress from an explicit path. Returns `default()` if missing/corrupt.
@@ -162,21 +162,6 @@ mod tests {
 
     // --- Persistence ---
 
-    #[test]
-    fn round_trip_save_and_load() {
-        let path = tmp_path("round_trip");
-        let _ = fs::remove_file(&path);
-
-        let mut p = PlayerProgress::default();
-        p.add_xp(1234);
-        p.unlocked_card_backs.push(2);
-        save_progress_to(&path, &p).expect("save");
-        let loaded = load_progress_from(&path);
-        assert_eq!(loaded.total_xp, 1234);
-        assert_eq!(loaded.level, p.level);
-        assert!(loaded.unlocked_card_backs.contains(&2));
-    }
-
     #[test]
     fn load_from_missing_file_returns_default() {
         let path = tmp_path("missing_xyz");
@@ -298,4 +283,70 @@ mod tests {
         assert!(!recorded_again, "same-day completion must report no-op");
         assert_eq!(p.daily_challenge_streak, 1);
     }
+
+    // --- Daily challenge history & longest streak ---
+
+    #[test]
+    fn record_daily_completion_appends_to_history() {
+        // Recording a completion adds the date to history, preserving the
+        // pre-call length + 1, and the new entry is the chronological tail.
+        let mut p = PlayerProgress::default();
+        let prev_len = p.daily_challenge_history.len();
+        let today = NaiveDate::from_ymd_opt(2026, 5, 5).unwrap();
+        let recorded = p.record_daily_completion(today);
+        assert!(recorded);
+        assert_eq!(p.daily_challenge_history.len(), prev_len + 1);
+        assert_eq!(p.daily_challenge_history.last().copied(), Some(today));
+    }
+
+    #[test]
+    fn record_daily_completion_updates_longest_streak() {
+        // A streak of 4 must lift `daily_challenge_longest_streak` from 2 to 4
+        // (we seed the previous best at 2 and watch it get overtaken).
+        let mut p = PlayerProgress {
+            daily_challenge_longest_streak: 2,
+            ..Default::default()
+        };
+        let d = NaiveDate::from_ymd_opt(2026, 5, 1).unwrap();
+        p.record_daily_completion(d);
+        p.record_daily_completion(d + Duration::days(1));
+        p.record_daily_completion(d + Duration::days(2));
+        // 3rd consecutive day equals the previous best; longest should match.
+        assert_eq!(p.daily_challenge_streak, 3);
+        assert_eq!(p.daily_challenge_longest_streak, 3);
+        // 4th consecutive day overtakes the previous best.
+        p.record_daily_completion(d + Duration::days(3));
+        assert_eq!(p.daily_challenge_streak, 4);
+        assert_eq!(p.daily_challenge_longest_streak, 4);
+    }
+
+    #[test]
+    fn legacy_progress_without_history_deserializes_to_empty() {
+        // A progress.json file produced before the history fields existed
+        // must still round-trip through serde::from_slice without error,
+        // with the new fields landing on their `#[serde(default)]` values.
+        let path = tmp_path("legacy_no_history");
+        let _ = fs::remove_file(&path);
+        let legacy_json = br#"{
+            "total_xp": 1500,
+            "level": 3,
+            "daily_challenge_last_completed": null,
+            "daily_challenge_streak": 0,
+            "weekly_goal_progress": {},
+            "unlocked_card_backs": [0],
+            "unlocked_backgrounds": [0],
+            "last_modified": "2026-04-29T12:00:00Z"
+        }"#;
+        fs::write(&path, legacy_json).expect("write");
+        let p = load_progress_from(&path);
+        assert_eq!(p.total_xp, 1500);
+        assert!(
+            p.daily_challenge_history.is_empty(),
+            "legacy file lacking daily_challenge_history must default to empty"
+        );
+        assert_eq!(
+            p.daily_challenge_longest_streak, 0,
+            "legacy file lacking daily_challenge_longest_streak must default to 0"
+        );
+    }
 }

solitaire_data/src/replay.rs

@@ -0,0 +1,740 @@
+//! Win-game replay recording + storage.
+//!
+//! When a player wins, the engine freezes the in-memory recording into a
+//! [`Replay`] and persists it to `<data_dir>/solitaire_quest/latest_replay.json`
+//! via [`save_latest_replay_to`]. The Stats screen offers a "Watch replay"
+//! action that loads it via [`load_latest_replay_from`] so the player can
+//! revisit (or, in a future build, watch the engine re-execute) the path
+//! they took to victory.
+//!
+//! Schema versioning: bump [`REPLAY_SCHEMA_VERSION`] whenever the on-disk
+//! shape changes. [`load_latest_replay_from`] returns `None` when the file
+//! carries any other version so older replays are silently dropped instead
+//! of crashing the loader.
+//!
+//! The recording is intentionally minimal — only [`ReplayMove`] entries
+//! that successfully advanced the game. `Undo` is **not** recorded: a
+//! replay represents the canonical path the player ultimately took to win,
+//! so backed-out missteps simply do not appear in the move list. The
+//! starting deal is not stored either — the [`seed`](Replay::seed) +
+//! [`draw_mode`](Replay::draw_mode) + [`mode`](Replay::mode) are sufficient
+//! for `GameState::new_with_mode` to rebuild the identical layout.
+
+use std::fs;
+use std::io;
+use std::path::{Path, PathBuf};
+
+use chrono::NaiveDate;
+use serde::{Deserialize, Serialize};
+use solitaire_core::game_state::{DrawMode, GameMode};
+use solitaire_core::pile::PileType;
+
+const APP_DIR_NAME: &str = "solitaire_quest";
+const LATEST_REPLAY_FILE_NAME: &str = "latest_replay.json";
+const REPLAY_HISTORY_FILE_NAME: &str = "replays.json";
+
+/// Maximum number of recent winning replays the rolling history retains.
+///
+/// When [`append_replay_to_history`] pushes a fresh entry past this cap,
+/// the oldest entry is dropped so the file never grows unbounded. The
+/// player can revisit any of the last [`REPLAY_HISTORY_CAP`] wins from
+/// the Stats overlay's replay selector — older wins age out silently.
+pub const REPLAY_HISTORY_CAP: usize = 8;
+
+/// Save-file schema version for [`ReplayHistory`]. Bump when the on-disk
+/// shape of the wrapper changes incompatibly so [`load_replay_history_from`]
+/// returns `None` for older files (the player simply sees an empty
+/// history rather than a half-loaded broken one). Bumping
+/// [`REPLAY_SCHEMA_VERSION`] independently invalidates individual
+/// [`Replay`] payloads inside an otherwise-current history.
+///
+/// History:
+/// - v1 (current): initial release of the rolling history wrapper.
+pub const REPLAY_HISTORY_SCHEMA_VERSION: u32 = 1;
+
+/// Default value for [`ReplayHistory::schema_version`] when deserialising
+/// files that pre-date the field. Any value other than
+/// [`REPLAY_HISTORY_SCHEMA_VERSION`] causes [`load_replay_history_from`]
+/// to return `None`.
+fn history_schema_v0() -> u32 {
+    0
+}
+
+/// Save-file schema version for [`Replay`]. Increment when the on-disk
+/// representation changes incompatibly so [`load_latest_replay_from`] can
+/// reject older formats and the player simply has no replay rather than
+/// seeing a broken one.
+///
+/// History:
+/// - v1: initial release. `ReplayMove` had separate `Draw` and `Recycle`
+///   variants which carried the *outcome* of a stock interaction rather
+///   than the player's atomic input.
+/// - v2 (current): `Draw` + `Recycle` collapsed into a single `StockClick`
+///   variant. The engine resolves draw-vs-recycle deterministically from
+///   the current stock state, so the input alone is sufficient and the
+///   replay model now stores atomic player inputs end-to-end.
+pub const REPLAY_SCHEMA_VERSION: u32 = 2;
+
+/// Default value for [`Replay::schema_version`] when deserialising files
+/// that pre-date the field. Any value other than [`REPLAY_SCHEMA_VERSION`]
+/// causes [`load_latest_replay_from`] to return `None`.
+fn schema_v0() -> u32 {
+    0
+}
+
+/// One atomic player input recorded during a winning game, in the order
+/// it was applied to the live `GameState`.
+///
+/// `Undo` is intentionally absent — see the module-level docs.
+///
+/// The variants represent *inputs*, not outcomes. `StockClick` covers
+/// every player click on the stock pile; the engine then resolves
+/// draw-vs-recycle deterministically from the current state during both
+/// recording and playback, so the same input always produces the same
+/// effect on the same starting deal.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub enum ReplayMove {
+    /// A successful `move_cards(from, to, count)` call.
+    Move {
+        /// Source pile.
+        from: PileType,
+        /// Destination pile.
+        to: PileType,
+        /// Number of cards moved.
+        count: usize,
+    },
+    /// A click on the stock pile. Resolves to a draw when stock is
+    /// non-empty and to a waste→stock recycle when stock is empty.
+    StockClick,
+}
+
+/// A complete recording of a single winning game.
+///
+/// Replays are reconstructed by rebuilding a fresh
+/// `GameState::new_with_mode(seed, draw_mode, mode)` and applying the
+/// [`moves`](Self::moves) in order. The presentation fields
+/// ([`time_seconds`](Self::time_seconds), [`final_score`](Self::final_score),
+/// [`recorded_at`](Self::recorded_at)) drive the Stats UI caption such as
+/// "Replay (2:14 win on 2026-05-02)".
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Replay {
+    /// Schema version. See [`REPLAY_SCHEMA_VERSION`].
+    #[serde(default = "schema_v0")]
+    pub schema_version: u32,
+    /// Seed used for the deal — replay rasterises the deck via
+    /// `GameState::new_with_mode(seed, draw_mode, mode)`.
+    pub seed: u64,
+    /// Draw mode the recorded game was played in.
+    pub draw_mode: DrawMode,
+    /// Game mode the recorded game was played in.
+    pub mode: GameMode,
+    /// Total wall-clock seconds the win took. Used for the Stats UI
+    /// "Replay (2:14 win on 2026-05-02)" caption.
+    pub time_seconds: u64,
+    /// Final score at the moment of the win.
+    pub final_score: i32,
+    /// ISO-8601 date the win was recorded.
+    pub recorded_at: NaiveDate,
+    /// Ordered move list. Each entry is what the player did, replayable
+    /// against a fresh `GameState` constructed from the seed.
+    pub moves: Vec<ReplayMove>,
+    /// Public share URL for this replay on the active sync backend, set
+    /// by `sync_plugin::poll_replay_upload_result` when the upload
+    /// task resolves. `None` when the player won on a local-only
+    /// backend, the upload failed, or the replay pre-dates v0.19.0
+    /// share-link persistence. `#[serde(default)]` keeps older
+    /// `replays.json` files loadable without bumping
+    /// [`REPLAY_SCHEMA_VERSION`].
+    #[serde(default)]
+    pub share_url: Option<String>,
+}
+
+impl Replay {
+    /// Construct a fresh replay with the current schema version. The
+    /// caller fills in the recorded fields; this is the canonical
+    /// constructor used by the engine on win.
+    pub fn new(
+        seed: u64,
+        draw_mode: DrawMode,
+        mode: GameMode,
+        time_seconds: u64,
+        final_score: i32,
+        recorded_at: NaiveDate,
+        moves: Vec<ReplayMove>,
+    ) -> Self {
+        Self {
+            schema_version: REPLAY_SCHEMA_VERSION,
+            seed,
+            draw_mode,
+            mode,
+            time_seconds,
+            final_score,
+            recorded_at,
+            moves,
+            share_url: None,
+        }
+    }
+}
+
+/// Rolling history of the player's most recent winning replays.
+///
+/// Stored as a single JSON file at
+/// `<data_dir>/solitaire_quest/replays.json` (see
+/// [`replay_history_path`]). Capped at [`REPLAY_HISTORY_CAP`] entries —
+/// when [`append_replay_to_history`] pushes past the cap, the oldest
+/// entry is dropped so the file never grows unbounded.
+///
+/// `replays[0]` is always the most recent win; the Stats overlay's
+/// replay selector defaults to that entry and surfaces the older
+/// entries behind a small chooser so the player can revisit a memorable
+/// game even after a more recent win.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct ReplayHistory {
+    /// Schema version. See [`REPLAY_HISTORY_SCHEMA_VERSION`].
+    #[serde(default = "history_schema_v0")]
+    pub schema_version: u32,
+    /// Most recent first. Capped at [`REPLAY_HISTORY_CAP`] entries —
+    /// older entries drop off when the cap is hit.
+    pub replays: Vec<Replay>,
+}
+
+impl Default for ReplayHistory {
+    /// An empty history at the current schema version. Used by callers
+    /// that need a starting point before the first winning replay has
+    /// ever been recorded.
+    fn default() -> Self {
+        Self {
+            schema_version: REPLAY_HISTORY_SCHEMA_VERSION,
+            replays: Vec::new(),
+        }
+    }
+}
+
+impl ReplayHistory {
+    /// Returns the most recent replay (`replays[0]`), or `None` when the
+    /// history is empty. Convenience used by the Stats overlay's default
+    /// selector position.
+    pub fn most_recent(&self) -> Option<&Replay> {
+        self.replays.first()
+    }
+
+    /// Returns the number of replays currently retained.
+    pub fn len(&self) -> usize {
+        self.replays.len()
+    }
+
+    /// Returns `true` when no replays have been recorded yet.
+    pub fn is_empty(&self) -> bool {
+        self.replays.is_empty()
+    }
+}
+
+/// Returns the platform-specific path to `latest_replay.json`, or `None`
+/// if `crate::data_dir()` is unavailable (e.g. minimal Linux containers).
+#[deprecated(
+    note = "single-slot replay storage replaced by the rolling history at \
+            replay_history_path(); kept for the one-shot legacy migration \
+            in migrate_legacy_latest_replay"
+)]
+pub fn latest_replay_path() -> Option<PathBuf> {
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(LATEST_REPLAY_FILE_NAME))
+}
+
+/// Returns the platform-specific path to `replays.json`, the rolling
+/// history file, or `None` if `crate::data_dir()` is unavailable (e.g.
+/// minimal Linux containers).
+pub fn replay_history_path() -> Option<PathBuf> {
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(REPLAY_HISTORY_FILE_NAME))
+}
+
+/// Save a [`Replay`] atomically to `path` using the standard `.tmp` →
+/// rename contract that the rest of `storage.rs` uses.
+///
+/// Overwrites any existing replay — only the most recent winning replay
+/// is retained on disk.
+#[deprecated(
+    note = "single-slot replay storage replaced by the rolling history; \
+            use append_replay_to_history instead. Kept for the one-shot \
+            legacy migration."
+)]
+pub fn save_latest_replay_to(path: &Path, replay: &Replay) -> io::Result<()> {
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)?;
+    }
+    let json = serde_json::to_string_pretty(replay).map_err(io::Error::other)?;
+    let tmp = path.with_extension("json.tmp");
+    fs::write(&tmp, json.as_bytes())?;
+    fs::rename(&tmp, path)?;
+    Ok(())
+}
+
+/// Load a [`Replay`] from `path`, returning `None` when the file is
+/// missing, corrupt, or carries a [`schema_version`](Replay::schema_version)
+/// other than [`REPLAY_SCHEMA_VERSION`].
+///
+/// Schema-mismatch is treated as "no replay" so the player just sees the
+/// "No replay recorded yet" caption rather than a half-loaded broken
+/// replay. Bumping [`REPLAY_SCHEMA_VERSION`] therefore invalidates every
+/// older save without further migration code.
+#[deprecated(
+    note = "single-slot replay storage replaced by the rolling history; \
+            use load_replay_history_from instead. Kept for the one-shot \
+            legacy migration."
+)]
+pub fn load_latest_replay_from(path: &Path) -> Option<Replay> {
+    let data = fs::read(path).ok()?;
+    let replay: Replay = serde_json::from_slice(&data).ok()?;
+    if replay.schema_version != REPLAY_SCHEMA_VERSION {
+        return None;
+    }
+    Some(replay)
+}
+
+/// Save a [`ReplayHistory`] atomically to `path` using the standard
+/// `.tmp` → rename contract.
+///
+/// The on-disk encoding is pretty-printed JSON; the file is intended to
+/// be small (≤ [`REPLAY_HISTORY_CAP`] entries, each carrying a few
+/// hundred move records at most) so the readability tradeoff is fine.
+pub fn save_replay_history_to(path: &Path, history: &ReplayHistory) -> io::Result<()> {
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)?;
+    }
+    let json = serde_json::to_string_pretty(history).map_err(io::Error::other)?;
+    let tmp = path.with_extension("json.tmp");
+    fs::write(&tmp, json.as_bytes())?;
+    fs::rename(&tmp, path)?;
+    Ok(())
+}
+
+/// Load a [`ReplayHistory`] from `path`, returning `None` when the file
+/// is missing, corrupt, or carries a [`schema_version`](ReplayHistory::schema_version)
+/// other than [`REPLAY_HISTORY_SCHEMA_VERSION`].
+///
+/// Individual [`Replay`] entries inside an otherwise-current history are
+/// filtered to only those carrying [`REPLAY_SCHEMA_VERSION`] — older
+/// entries are silently dropped so a future bump of the inner replay
+/// schema does not corrupt the wrapper.
+pub fn load_replay_history_from(path: &Path) -> Option<ReplayHistory> {
+    let data = fs::read(path).ok()?;
+    let history: ReplayHistory = serde_json::from_slice(&data).ok()?;
+    if history.schema_version != REPLAY_HISTORY_SCHEMA_VERSION {
+        return None;
+    }
+    let filtered: Vec<Replay> = history
+        .replays
+        .into_iter()
+        .filter(|r| r.schema_version == REPLAY_SCHEMA_VERSION)
+        .collect();
+    Some(ReplayHistory {
+        schema_version: REPLAY_HISTORY_SCHEMA_VERSION,
+        replays: filtered,
+    })
+}
+
+/// Append `replay` to the front of the rolling history at `path`,
+/// dropping the oldest entry once [`REPLAY_HISTORY_CAP`] is exceeded,
+/// and persist the updated history atomically.
+///
+/// If `path` has no existing history (missing file, corrupt, or
+/// schema-mismatched) a fresh [`ReplayHistory::default`] is used as the
+/// starting point so the new replay is always saved. The returned
+/// [`ReplayHistory`] is the exact value written to disk so callers can
+/// update an in-memory mirror (e.g. the Stats overlay's
+/// `ReplayHistoryResource`) without a follow-up `load`.
+pub fn append_replay_to_history(
+    path: &Path,
+    replay: Replay,
+) -> io::Result<ReplayHistory> {
+    let mut history = load_replay_history_from(path).unwrap_or_default();
+    // Most recent first. Reserve the front slot; pop the oldest if we
+    // exceed the cap so the file never grows unbounded.
+    history.replays.insert(0, replay);
+    if history.replays.len() > REPLAY_HISTORY_CAP {
+        history.replays.truncate(REPLAY_HISTORY_CAP);
+    }
+    save_replay_history_to(path, &history)?;
+    Ok(history)
+}
+
+/// One-shot migration from the legacy single-slot
+/// `latest_replay.json` file to the rolling [`ReplayHistory`] stored at
+/// `history_path`.
+///
+/// Behaviour matrix:
+/// - `history_path` already exists  → no-op (the rolling history wins).
+/// - `history_path` is absent and `latest_path` is absent → no-op.
+/// - `history_path` is absent and `latest_path` exists with a valid
+///   replay → seed a fresh history with that one replay and write it.
+/// - `history_path` is absent and `latest_path` exists but is corrupt /
+///   schema-mismatched → write an empty history (we know the player is
+///   on the new build and shouldn't keep being prompted to migrate).
+///
+/// The legacy `latest_replay.json` file is intentionally NOT deleted by
+/// this helper — keep it for one release as a safety net so a player
+/// rolling back to the previous build doesn't lose their last winning
+/// replay. The deletion is planned for the release after this one.
+pub fn migrate_legacy_latest_replay(latest_path: &Path, history_path: &Path) {
+    if history_path.exists() {
+        // Rolling history is authoritative once it exists.
+        return;
+    }
+    if !latest_path.exists() {
+        return;
+    }
+    // Use the deprecated loader directly — the migration is the one
+    // place we still consult the legacy file shape on purpose.
+    #[allow(deprecated)]
+    let legacy = load_latest_replay_from(latest_path);
+    let history = match legacy {
+        Some(replay) => ReplayHistory {
+            schema_version: REPLAY_HISTORY_SCHEMA_VERSION,
+            replays: vec![replay],
+        },
+        None => ReplayHistory::default(),
+    };
+    if let Err(e) = save_replay_history_to(history_path, &history) {
+        // Migration failure is non-fatal: on the next launch we'll just
+        // try again. We log to stderr rather than panic so headless
+        // tests stay quiet.
+        eprintln!(
+            "replay: failed to migrate legacy latest_replay.json into rolling history: {e}",
+        );
+    }
+}
+
+#[cfg(test)]
+// The legacy single-slot tests still exercise `save_latest_replay_to` /
+// `load_latest_replay_from` on purpose — they're the round-trip
+// guardrails for the migration source format.
+#[allow(deprecated)]
+mod tests {
+    use super::*;
+    use std::env;
+
+    fn tmp_path(name: &str) -> PathBuf {
+        env::temp_dir().join(format!("solitaire_test_replay_{name}.json"))
+    }
+
+    fn sample_replay() -> Replay {
+        let date = NaiveDate::from_ymd_opt(2026, 5, 2).expect("valid date");
+        Replay::new(
+            12345,
+            DrawMode::DrawThree,
+            GameMode::Classic,
+            134,
+            5_120,
+            date,
+            vec![
+                ReplayMove::StockClick,
+                ReplayMove::Move {
+                    from: PileType::Waste,
+                    to: PileType::Tableau(3),
+                    count: 1,
+                },
+                ReplayMove::StockClick,
+                ReplayMove::Move {
+                    from: PileType::Tableau(3),
+                    to: PileType::Foundation(0),
+                    count: 1,
+                },
+            ],
+        )
+    }
+
+    /// A non-trivial replay with mixed move kinds must round-trip
+    /// byte-identically through `save_latest_replay_to` /
+    /// `load_latest_replay_from`. Catches any future field that forgets
+    /// `Serialize`/`Deserialize` or breaks the on-disk format.
+    #[test]
+    fn replay_round_trips_through_save_and_load() {
+        let path = tmp_path("round_trip");
+        let _ = fs::remove_file(&path);
+
+        let replay = sample_replay();
+        save_latest_replay_to(&path, &replay).expect("save");
+
+        let loaded = load_latest_replay_from(&path).expect("load must succeed");
+        assert_eq!(loaded, replay, "round-trip must preserve every field");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// A file written by an older schema (or a pre-`schema_version`
+    /// build) must be rejected. We write a minimal v0 fixture and assert
+    /// that `load_latest_replay_from` returns `None` so the player gets
+    /// a clean "no replay" state instead of a broken one.
+    #[test]
+    fn replay_legacy_schema_version_falls_through_to_none() {
+        let path = tmp_path("legacy_schema");
+        let _ = fs::remove_file(&path);
+
+        // No `schema_version` key — defaults to 0 via `schema_v0()`. Even
+        // if the rest of the JSON parses cleanly, the version gate must
+        // reject it.
+        let v0_json = r#"{
+            "seed": 1,
+            "draw_mode": "DrawOne",
+            "mode": "Classic",
+            "time_seconds": 60,
+            "final_score": 100,
+            "recorded_at": "2025-01-01",
+            "moves": []
+        }"#;
+        fs::write(&path, v0_json).expect("write v0 fixture");
+
+        assert!(
+            load_latest_replay_from(&path).is_none(),
+            "v0 replay must be rejected (schema gate)",
+        );
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// Backwards-compat: a `Replay` record persisted before v0.19.0
+    /// share-link persistence carries no `share_url` field on disk.
+    /// `#[serde(default)]` must let it deserialise cleanly with
+    /// `share_url == None`, so existing players don't see their
+    /// rolling history wiped on the v0.19.0 update.
+    #[test]
+    fn replay_loads_when_share_url_field_is_absent() {
+        let pre_v019_json = format!(
+            r#"{{
+                "schema_version": {schema},
+                "seed": 1,
+                "draw_mode": "DrawOne",
+                "mode": "Classic",
+                "time_seconds": 60,
+                "final_score": 100,
+                "recorded_at": "2025-01-01",
+                "moves": []
+            }}"#,
+            schema = REPLAY_SCHEMA_VERSION,
+        );
+        let parsed: Replay = serde_json::from_str(&pre_v019_json)
+            .expect("pre-v0.19.0 replay JSON must still deserialise");
+        assert!(
+            parsed.share_url.is_none(),
+            "missing share_url field must default to None",
+        );
+    }
+
+    /// Atomic-write contract — `.tmp` must not be left behind after
+    /// `save_latest_replay_to` returns. Mirrors the same check that
+    /// guards `save_game_state_to` in `storage.rs`.
+    #[test]
+    fn replay_save_is_atomic() {
+        let path = tmp_path("atomic");
+        let _ = fs::remove_file(&path);
+
+        save_latest_replay_to(&path, &sample_replay()).expect("save");
+        let tmp = path.with_extension("json.tmp");
+        assert!(!tmp.exists(), ".tmp must be cleaned up after rename");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// Loading from a path that does not exist must return `None`, not
+    /// panic or surface an `Err`.
+    #[test]
+    fn replay_missing_file_returns_none() {
+        let path = tmp_path("missing_xyz");
+        let _ = fs::remove_file(&path);
+        assert!(load_latest_replay_from(&path).is_none());
+    }
+
+    /// Loading from a corrupt / partially-written file must return
+    /// `None`, not surface a deserialiser error to the engine.
+    #[test]
+    fn replay_corrupt_file_returns_none() {
+        let path = tmp_path("corrupt");
+        fs::write(&path, b"not valid json!!!").expect("write");
+        assert!(load_latest_replay_from(&path).is_none());
+        let _ = fs::remove_file(&path);
+    }
+
+    // -----------------------------------------------------------------------
+    // ReplayHistory — rolling list of recent wins
+    // -----------------------------------------------------------------------
+
+    /// Build a [`Replay`] whose `final_score` carries `id` so tests can
+    /// assert ordering / identity without writing a deep equality match.
+    fn replay_with_id(id: i32) -> Replay {
+        let date = NaiveDate::from_ymd_opt(2026, 5, 2).expect("valid date");
+        Replay::new(
+            id as u64,
+            DrawMode::DrawOne,
+            GameMode::Classic,
+            60,
+            id,
+            date,
+            vec![ReplayMove::StockClick],
+        )
+    }
+
+    /// Pushing past [`REPLAY_HISTORY_CAP`] must drop the oldest entries —
+    /// the on-disk file (and the in-memory mirror returned by the helper)
+    /// stays bounded so the user's data dir never grows unbounded.
+    #[test]
+    fn append_replay_to_history_caps_at_eight() {
+        let path = tmp_path("history_cap");
+        let _ = fs::remove_file(&path);
+
+        let mut last_returned = ReplayHistory::default();
+        for i in 0..10 {
+            last_returned = append_replay_to_history(&path, replay_with_id(i))
+                .expect("append must succeed");
+        }
+
+        assert_eq!(
+            last_returned.replays.len(),
+            REPLAY_HISTORY_CAP,
+            "history must be capped at REPLAY_HISTORY_CAP entries",
+        );
+        // The most recent ten pushes were ids 0..=9; ids 9, 8, ..., 2
+        // survive (newest first), ids 0 and 1 aged out.
+        let ids: Vec<i32> = last_returned.replays.iter().map(|r| r.final_score).collect();
+        assert_eq!(
+            ids,
+            vec![9, 8, 7, 6, 5, 4, 3, 2],
+            "newest entries must survive, oldest must age out",
+        );
+
+        // The on-disk file must agree with the returned in-memory copy.
+        let loaded = load_replay_history_from(&path).expect("load must succeed");
+        assert_eq!(loaded, last_returned, "disk must mirror returned history");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// `append_replay_to_history` must place new entries at index 0 so
+    /// the Stats overlay's default selector (most recent) lands on the
+    /// just-saved replay.
+    #[test]
+    fn append_replay_inserts_at_front() {
+        let path = tmp_path("history_front");
+        let _ = fs::remove_file(&path);
+
+        append_replay_to_history(&path, replay_with_id(1)).expect("append 1");
+        append_replay_to_history(&path, replay_with_id(2)).expect("append 2");
+        let history = append_replay_to_history(&path, replay_with_id(3)).expect("append 3");
+
+        let ids: Vec<i32> = history.replays.iter().map(|r| r.final_score).collect();
+        assert_eq!(
+            ids,
+            vec![3, 2, 1],
+            "history must be reverse-chronological (newest first)",
+        );
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// On first launch with the new code, a pre-existing
+    /// `latest_replay.json` must seed the new rolling history so the
+    /// player doesn't lose their last winning replay across the upgrade.
+    #[test]
+    fn legacy_latest_replay_migrates_to_history_on_first_launch() {
+        let latest = tmp_path("legacy_migrate_latest");
+        let history = tmp_path("legacy_migrate_history");
+        let _ = fs::remove_file(&latest);
+        let _ = fs::remove_file(&history);
+
+        // Seed the legacy file with a real replay.
+        let legacy_replay = sample_replay();
+        save_latest_replay_to(&latest, &legacy_replay).expect("seed legacy");
+        assert!(!history.exists(), "history file must not exist pre-migration");
+
+        migrate_legacy_latest_replay(&latest, &history);
+
+        assert!(history.exists(), "migration must create the history file");
+        let loaded = load_replay_history_from(&history)
+            .expect("post-migration history must load");
+        assert_eq!(loaded.replays.len(), 1, "history must hold exactly the legacy entry");
+        assert_eq!(loaded.replays[0], legacy_replay, "entry must equal the legacy replay");
+        // Legacy file is intentionally retained for one release as a
+        // safety net — see `migrate_legacy_latest_replay` doc comment.
+        assert!(latest.exists(), "legacy file must NOT be deleted by migration");
+
+        let _ = fs::remove_file(&latest);
+        let _ = fs::remove_file(&history);
+    }
+
+    /// When the rolling history file already exists, the migration must
+    /// be a no-op — we never want to overwrite the player's accumulated
+    /// history with a stale single-slot legacy entry.
+    #[test]
+    fn migrate_is_noop_when_history_already_exists() {
+        let latest = tmp_path("legacy_noop_latest");
+        let history = tmp_path("legacy_noop_history");
+        let _ = fs::remove_file(&latest);
+        let _ = fs::remove_file(&history);
+
+        save_latest_replay_to(&latest, &sample_replay()).expect("seed legacy");
+        let pre_existing = ReplayHistory {
+            schema_version: REPLAY_HISTORY_SCHEMA_VERSION,
+            replays: vec![replay_with_id(42)],
+        };
+        save_replay_history_to(&history, &pre_existing).expect("seed history");
+
+        migrate_legacy_latest_replay(&latest, &history);
+
+        let loaded = load_replay_history_from(&history).expect("load");
+        assert_eq!(loaded, pre_existing, "existing history must not be overwritten");
+
+        let _ = fs::remove_file(&latest);
+        let _ = fs::remove_file(&history);
+    }
+
+    /// A populated [`ReplayHistory`] must round-trip byte-identically
+    /// through `save_replay_history_to` / `load_replay_history_from`.
+    #[test]
+    fn replay_history_round_trips_through_save_and_load() {
+        let path = tmp_path("history_round_trip");
+        let _ = fs::remove_file(&path);
+
+        let history = ReplayHistory {
+            schema_version: REPLAY_HISTORY_SCHEMA_VERSION,
+            replays: vec![replay_with_id(7), replay_with_id(3), sample_replay()],
+        };
+        save_replay_history_to(&path, &history).expect("save");
+        let loaded = load_replay_history_from(&path).expect("load");
+        assert_eq!(loaded, history, "round-trip must preserve every field");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// A file written by an older history schema must be rejected so the
+    /// player sees a clean empty history rather than a half-loaded one.
+    #[test]
+    fn replay_history_legacy_schema_version_falls_through_to_none() {
+        let path = tmp_path("history_legacy_schema");
+        let _ = fs::remove_file(&path);
+
+        // No `schema_version` key → defaults to 0 via `history_schema_v0()`.
+        let v0_json = r#"{
+            "replays": []
+        }"#;
+        fs::write(&path, v0_json).expect("write v0 fixture");
+
+        assert!(
+            load_replay_history_from(&path).is_none(),
+            "v0 history must be rejected (schema gate)",
+        );
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// Atomic-write contract for the rolling history — `.tmp` must not be
+    /// left behind after `save_replay_history_to` returns.
+    #[test]
+    fn replay_history_save_is_atomic() {
+        let path = tmp_path("history_atomic");
+        let _ = fs::remove_file(&path);
+
+        save_replay_history_to(&path, &ReplayHistory::default()).expect("save");
+        let tmp = path.with_extension("json.tmp");
+        assert!(!tmp.exists(), ".tmp must be cleaned up after rename");
+
+        let _ = fs::remove_file(&path);
+    }
+}

solitaire_data/src/settings.rs

@@ -151,6 +151,61 @@ pub struct Settings {
     /// `#[serde(default = "default_tooltip_delay")]`.
     #[serde(default = "default_tooltip_delay")]
     pub tooltip_delay_secs: f32,
+    /// Multiplier applied to the post-game time-bonus score component
+    /// shown in the win-summary modal. Range
+    /// `[TIME_BONUS_MULTIPLIER_MIN, TIME_BONUS_MULTIPLIER_MAX]`
+    /// (`0.0`–`2.0`); default `1.0` keeps the existing behaviour.
+    ///
+    /// **COSMETIC ONLY** — this multiplier changes what the player
+    /// sees in the win modal's score breakdown but does **not** affect
+    /// achievement unlock thresholds, lifetime score totals, or
+    /// leaderboard submissions, which all use the raw, unmultiplied
+    /// score values produced by `solitaire_core`. Older
+    /// `settings.json` files written before this field existed
+    /// deserialize cleanly to `1.0` via
+    /// `#[serde(default = "default_time_bonus_multiplier")]`.
+    #[serde(default = "default_time_bonus_multiplier")]
+    pub time_bonus_multiplier: f32,
+    /// When `true`, the engine rejects new-game deals the
+    /// [`solitaire_core::solver`] cannot prove winnable, retrying
+    /// fresh seeds up to [`SOLVER_DEAL_RETRY_CAP`] attempts before
+    /// giving up and using the last tried seed. Off by default —
+    /// the solver adds a few hundred milliseconds of latency on the
+    /// pathological deals that hit the budget cap, and not every
+    /// player wants to wait. Older `settings.json` files written
+    /// before this field existed deserialize cleanly to `false` via
+    /// `#[serde(default)]`.
+    ///
+    /// Scope: only random-seed Classic-mode deals are filtered.
+    /// Daily challenges, replays, and explicit-seed requests skip the
+    /// solver retry loop — see `solitaire_engine::handle_new_game`.
+    #[serde(default)]
+    pub winnable_deals_only: bool,
+    /// When `true`, suppresses the launch-time
+    /// `apply_smart_default_window_size` system: the window opens at
+    /// the literal `(1280, 800)` default instead of resizing to ~70 %
+    /// of the primary monitor's logical size on the first frame. For
+    /// players who specifically prefer the 1280×800 baseline on every
+    /// fresh launch (i.e. installs without saved geometry).
+    ///
+    /// Older `settings.json` files written before this field existed
+    /// deserialize cleanly to `false` via `#[serde(default)]`, which
+    /// preserves the smart-default behaviour shipped in v0.19.0.
+    /// Saved-geometry launches are unaffected by this flag — the
+    /// player's last window size always wins.
+    #[serde(default)]
+    pub disable_smart_default_size: bool,
+    /// Per-move duration during replay playback, in seconds. Range
+    /// `[REPLAY_MOVE_INTERVAL_MIN_SECS, REPLAY_MOVE_INTERVAL_MAX_SECS]`;
+    /// default mirrors `solitaire_engine::replay_playback::REPLAY_MOVE_INTERVAL_SECS`
+    /// (0.45 s/move) so existing playback behaviour is unchanged for
+    /// players who never touch the slider. Smaller values scrub
+    /// faster through the recorded move list. Older `settings.json`
+    /// files written before this field existed deserialize cleanly to
+    /// the default via
+    /// `#[serde(default = "default_replay_move_interval_secs")]`.
+    #[serde(default = "default_replay_move_interval_secs")]
+    pub replay_move_interval_secs: f32,
 }
 
 fn default_draw_mode() -> DrawMode {
@@ -189,6 +244,63 @@ pub const TOOLTIP_DELAY_MAX_SECS: f32 = 1.5;
 /// Increment applied by the tooltip-delay decrement / increment buttons.
 pub const TOOLTIP_DELAY_STEP_SECS: f32 = 0.1;
 
+/// Lower bound of the player-tunable time-bonus multiplier. `0.0`
+/// disables the time-bonus row entirely (renders as "Off" in the UI).
+pub const TIME_BONUS_MULTIPLIER_MIN: f32 = 0.0;
+
+/// Upper bound of the player-tunable time-bonus multiplier. `2.0`
+/// doubles the displayed time bonus.
+pub const TIME_BONUS_MULTIPLIER_MAX: f32 = 2.0;
+
+/// Increment applied by the time-bonus multiplier decrement /
+/// increment buttons.
+pub const TIME_BONUS_MULTIPLIER_STEP: f32 = 0.1;
+
+/// Default value for [`Settings::time_bonus_multiplier`]. `1.0` keeps
+/// the displayed time bonus identical to the raw value produced by
+/// `solitaire_core::scoring::compute_time_bonus`.
+fn default_time_bonus_multiplier() -> f32 {
+    1.0
+}
+
+/// Default per-move duration during replay playback, in seconds.
+/// Mirrors `solitaire_engine::replay_playback::REPLAY_MOVE_INTERVAL_SECS`
+/// so legacy `settings.json` files load to the existing baseline and
+/// playback feels identical for players who never touch the slider.
+/// The constant is duplicated across the data and engine crates
+/// because `solitaire_data` cannot depend on the engine crate — keep
+/// the two values in sync when adjusting either.
+fn default_replay_move_interval_secs() -> f32 {
+    0.45
+}
+
+/// Lower bound of the player-tunable replay-playback per-move interval,
+/// in seconds. Below this the cards barely register visually before
+/// the next move fires; the cap keeps the playback legible.
+pub const REPLAY_MOVE_INTERVAL_MIN_SECS: f32 = 0.10;
+
+/// Upper bound of the player-tunable replay-playback per-move interval,
+/// in seconds. One second per move is a comfortable upper limit for
+/// players who want to study a recorded game frame by frame.
+pub const REPLAY_MOVE_INTERVAL_MAX_SECS: f32 = 1.00;
+
+/// Increment applied by the replay-playback decrement / increment
+/// buttons. 0.05 s gives 19 stops between MIN and MAX — fine-grained
+/// enough to land on any "round" speed (0.10 s, 0.25 s, 0.45 s, etc.)
+/// without making the slider feel stuck on the same value.
+pub const REPLAY_MOVE_INTERVAL_STEP_SECS: f32 = 0.05;
+
+/// Maximum number of seed retries [`solitaire_engine::handle_new_game`]
+/// is willing to attempt before giving up and accepting the latest
+/// candidate seed when [`Settings::winnable_deals_only`] is on. If
+/// every retry comes back [`SolverResult::Unwinnable`] (which would
+/// be very unusual) we'd rather hand the player a possibly-unwinnable
+/// deal than spin forever on the main thread.
+///
+/// 50 attempts × ~50 ms median per solve = ~2.5 s worst-case stall —
+/// the upper bound on UI freeze when the toggle is on.
+pub const SOLVER_DEAL_RETRY_CAP: u32 = 50;
+
 impl Default for Settings {
     fn default() -> Self {
         Self {
@@ -206,12 +318,17 @@ impl Default for Settings {
             selected_theme_id: default_theme_id(),
             shown_achievement_onboarding: false,
             tooltip_delay_secs: default_tooltip_delay(),
+            time_bonus_multiplier: default_time_bonus_multiplier(),
+            winnable_deals_only: false,
+            disable_smart_default_size: false,
+            replay_move_interval_secs: default_replay_move_interval_secs(),
         }
     }
 }
 
 impl Settings {
-    /// Clamps `sfx_volume`, `music_volume`, and `tooltip_delay_secs` into
+    /// Clamps `sfx_volume`, `music_volume`, `tooltip_delay_secs`,
+    /// `time_bonus_multiplier`, and `replay_move_interval_secs` into
     /// their respective ranges after deserialization or hand-editing of
     /// `settings.json`.
     pub fn sanitized(self) -> Self {
@@ -221,6 +338,12 @@ impl Settings {
             tooltip_delay_secs: self
                 .tooltip_delay_secs
                 .clamp(TOOLTIP_DELAY_MIN_SECS, TOOLTIP_DELAY_MAX_SECS),
+            time_bonus_multiplier: self
+                .time_bonus_multiplier
+                .clamp(TIME_BONUS_MULTIPLIER_MIN, TIME_BONUS_MULTIPLIER_MAX),
+            replay_move_interval_secs: self
+                .replay_move_interval_secs
+                .clamp(REPLAY_MOVE_INTERVAL_MIN_SECS, REPLAY_MOVE_INTERVAL_MAX_SECS),
             ..self
         }
     }
@@ -245,12 +368,41 @@ impl Settings {
             .clamp(TOOLTIP_DELAY_MIN_SECS, TOOLTIP_DELAY_MAX_SECS);
         self.tooltip_delay_secs
     }
+
+    /// Adjust the time-bonus multiplier by `delta`, clamped to
+    /// `[TIME_BONUS_MULTIPLIER_MIN, TIME_BONUS_MULTIPLIER_MAX]`. The
+    /// result is rounded to one decimal place so the readout stays
+    /// clean across repeated `±` clicks (avoids float drift like
+    /// `0.30000004`). Returns the new value.
+    pub fn adjust_time_bonus_multiplier(&mut self, delta: f32) -> f32 {
+        let raw = (self.time_bonus_multiplier + delta)
+            .clamp(TIME_BONUS_MULTIPLIER_MIN, TIME_BONUS_MULTIPLIER_MAX);
+        // Round to 1 decimal place — the slider step is 0.1, so this
+        // collapses any FP drift introduced by repeated additions.
+        self.time_bonus_multiplier = (raw * 10.0).round() / 10.0;
+        self.time_bonus_multiplier
+    }
+
+    /// Adjust the replay-playback per-move interval by `delta`
+    /// seconds, clamped to
+    /// `[REPLAY_MOVE_INTERVAL_MIN_SECS, REPLAY_MOVE_INTERVAL_MAX_SECS]`.
+    /// The result is rounded to two decimal places so the readout
+    /// stays clean across repeated `±` clicks at the 0.05 s step
+    /// (avoids float drift like `0.45000003`). Returns the new value.
+    pub fn adjust_replay_move_interval(&mut self, delta: f32) -> f32 {
+        let raw = (self.replay_move_interval_secs + delta)
+            .clamp(REPLAY_MOVE_INTERVAL_MIN_SECS, REPLAY_MOVE_INTERVAL_MAX_SECS);
+        // Round to 2 decimal places — the slider step is 0.05, so this
+        // collapses any FP drift introduced by repeated additions.
+        self.replay_move_interval_secs = (raw * 100.0).round() / 100.0;
+        self.replay_move_interval_secs
+    }
 }
 
 /// Returns the platform-specific path to `settings.json`, or `None` if
-/// `dirs::data_dir()` is unavailable.
+/// the platform's data directory is unavailable.
 pub fn settings_file_path() -> Option<PathBuf> {
-    dirs::data_dir().map(|d| d.join(APP_DIR_NAME).join(SETTINGS_FILE_NAME))
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(SETTINGS_FILE_NAME))
 }
 
 /// Load settings from an explicit path. Returns `Settings::default()` if the
@@ -285,19 +437,6 @@ mod tests {
         env::temp_dir().join(format!("solitaire_settings_test_{name}.json"))
     }
 
-    #[test]
-    fn defaults_are_reasonable() {
-        let s = Settings::default();
-        assert!((s.sfx_volume - 0.8).abs() < 1e-6);
-        assert!((s.music_volume - 0.5).abs() < 1e-6);
-        assert!(!s.first_run_complete);
-        assert_eq!(s.draw_mode, DrawMode::DrawOne);
-        assert_eq!(s.animation_speed, AnimSpeed::Normal);
-        assert_eq!(s.theme, Theme::Green);
-        assert_eq!(s.sync_backend, SyncBackend::Local);
-        assert!((s.tooltip_delay_secs - default_tooltip_delay()).abs() < 1e-6);
-    }
-
     #[test]
     fn adjust_sfx_volume_clamps() {
         let mut s = Settings { sfx_volume: 0.5, ..Default::default() };
@@ -330,74 +469,6 @@ mod tests {
         assert!(s.first_run_complete);
     }
 
-    #[test]
-    fn sanitized_clamps_music_volume() {
-        let s = Settings { music_volume: 2.0, ..Default::default() }.sanitized();
-        assert_eq!(s.music_volume, 1.0);
-
-        let s2 = Settings { music_volume: -0.5, ..Default::default() }.sanitized();
-        assert_eq!(s2.music_volume, 0.0);
-    }
-
-    #[test]
-    fn round_trip_save_and_load() {
-        let path = tmp_path("round_trip");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            sfx_volume: 0.42,
-            first_run_complete: true,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert_eq!(loaded, s);
-    }
-
-    #[test]
-    fn round_trip_save_and_load_full_settings() {
-        let path = tmp_path("round_trip_full");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            draw_mode: DrawMode::DrawThree,
-            sfx_volume: 0.3,
-            music_volume: 0.7,
-            animation_speed: AnimSpeed::Fast,
-            theme: Theme::Dark,
-            sync_backend: SyncBackend::SolitaireServer {
-                url: "https://example.com".to_string(),
-                username: "testuser".to_string(),
-            },
-            selected_card_back: 0,
-            selected_background: 0,
-            first_run_complete: true,
-            color_blind_mode: false,
-            window_geometry: None,
-            selected_theme_id: "default".to_string(),
-            shown_achievement_onboarding: false,
-            tooltip_delay_secs: default_tooltip_delay(),
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert_eq!(loaded, s);
-    }
-
-    #[test]
-    fn round_trip_preserves_non_default_cosmetic_selections() {
-        // selected_card_back and selected_background must survive save→load with
-        // non-zero values — zero is the default and not a meaningful regression check.
-        let path = tmp_path("cosmetic_selections");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            selected_card_back: 3,
-            selected_background: 2,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert_eq!(loaded.selected_card_back, 3);
-        assert_eq!(loaded.selected_background, 2);
-    }
-
     #[test]
     fn load_from_missing_file_returns_default() {
         let path = tmp_path("missing_xyz");
@@ -414,250 +485,6 @@ mod tests {
         assert_eq!(s, Settings::default());
     }
 
-    #[test]
-    fn load_from_old_format_uses_defaults_for_new_fields() {
-        // Simulate a settings.json written by an older version that only had
-        // sfx_volume and first_run_complete.
-        let path = tmp_path("old_format");
-        fs::write(
-            &path,
-            br#"{ "sfx_volume": 0.6, "first_run_complete": true }"#,
-        )
-        .expect("write");
-        let s = load_settings_from(&path);
-        assert!((s.sfx_volume - 0.6).abs() < 1e-6);
-        assert!(s.first_run_complete);
-        // New fields should fall back to their defaults.
-        assert!((s.music_volume - 0.5).abs() < 1e-6);
-        assert_eq!(s.animation_speed, AnimSpeed::Normal);
-        assert_eq!(s.theme, Theme::Green);
-        assert_eq!(s.sync_backend, SyncBackend::Local);
-        assert_eq!(s.draw_mode, DrawMode::DrawOne);
-        assert_eq!(s.selected_card_back, 0, "cosmetic card-back must default to 0 on old format");
-        assert_eq!(s.selected_background, 0, "cosmetic background must default to 0 on old format");
-        assert!(!s.color_blind_mode, "color_blind_mode must default to false on old format");
-    }
-
-    #[test]
-    fn color_blind_mode_defaults_to_false_when_field_absent() {
-        // Simulate a JSON file that has no color_blind_mode field.
-        let json = br#"{ "sfx_volume": 0.7 }"#;
-        let s: Settings = serde_json::from_slice(json).unwrap_or_default();
-        assert!(!s.color_blind_mode, "color_blind_mode must be false when absent from JSON");
-    }
-
-    #[test]
-    fn color_blind_mode_round_trips() {
-        let path = tmp_path("color_blind");
-        let _ = std::fs::remove_file(&path);
-        let s = Settings {
-            color_blind_mode: true,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert!(loaded.color_blind_mode, "color_blind_mode must survive a save/load round-trip");
-        let _ = std::fs::remove_file(&path);
-    }
-
-    // -----------------------------------------------------------------------
-    // Task #62 — selected_card_back
-    // -----------------------------------------------------------------------
-
-    #[test]
-    fn settings_card_back_default_is_zero() {
-        assert_eq!(Settings::default().selected_card_back, 0);
-    }
-
-    #[test]
-    fn settings_card_back_serializes_round_trip() {
-        let path = tmp_path("card_back_round_trip");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            selected_card_back: 2,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert_eq!(loaded.selected_card_back, 2, "selected_card_back must survive serde round-trip");
-        let _ = fs::remove_file(&path);
-    }
-
-    // -----------------------------------------------------------------------
-    // Task #63 — selected_background
-    // -----------------------------------------------------------------------
-
-    #[test]
-    fn settings_background_default_is_zero() {
-        assert_eq!(Settings::default().selected_background, 0);
-    }
-
-    #[test]
-    fn settings_background_serializes_round_trip() {
-        let path = tmp_path("background_round_trip");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            selected_background: 3,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert_eq!(loaded.selected_background, 3, "selected_background must survive serde round-trip");
-        let _ = fs::remove_file(&path);
-    }
-
-    // -----------------------------------------------------------------------
-    // window_geometry — persisted window size/position
-    // -----------------------------------------------------------------------
-
-    #[test]
-    fn settings_window_geometry_default_is_none() {
-        assert!(
-            Settings::default().window_geometry.is_none(),
-            "default window_geometry must be None so first launch uses platform defaults"
-        );
-    }
-
-    #[test]
-    fn settings_with_window_geometry_round_trip() {
-        let path = tmp_path("window_geometry_round_trip");
-        let _ = fs::remove_file(&path);
-        let geom = WindowGeometry {
-            width: 1440,
-            height: 900,
-            x: 120,
-            y: 80,
-        };
-        let s = Settings {
-            window_geometry: Some(geom),
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert_eq!(
-            loaded.window_geometry,
-            Some(geom),
-            "window_geometry must survive serde round-trip"
-        );
-        let _ = fs::remove_file(&path);
-    }
-
-    #[test]
-    fn legacy_settings_without_window_geometry_deserializes_to_none() {
-        // A settings.json written by an older version of the game will be
-        // missing this field entirely. `#[serde(default)]` on the field
-        // must yield `None` rather than failing the whole deserialise.
-        let json = br#"{ "sfx_volume": 0.7, "first_run_complete": true }"#;
-        let s: Settings = serde_json::from_slice(json).unwrap_or_default();
-        assert!(
-            s.window_geometry.is_none(),
-            "legacy settings.json missing window_geometry must deserialize to None"
-        );
-    }
-
-    #[test]
-    fn window_geometry_explicit_null_deserializes_to_none() {
-        // An explicit `"window_geometry": null` is also valid input that
-        // must yield None — keeps tooling that hand-edits the file safe.
-        let json = br#"{ "window_geometry": null }"#;
-        let s: Settings = serde_json::from_slice(json).unwrap_or_default();
-        assert!(s.window_geometry.is_none());
-    }
-
-    // -----------------------------------------------------------------------
-    // shown_achievement_onboarding — first-win cue one-shot guard
-    // -----------------------------------------------------------------------
-
-    #[test]
-    fn settings_shown_achievement_onboarding_default_is_false() {
-        assert!(
-            !Settings::default().shown_achievement_onboarding,
-            "default shown_achievement_onboarding must be false so the cue fires once"
-        );
-    }
-
-    #[test]
-    fn settings_shown_achievement_onboarding_round_trip() {
-        let path = tmp_path("achievement_onboarding_round_trip");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            shown_achievement_onboarding: true,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert!(
-            loaded.shown_achievement_onboarding,
-            "shown_achievement_onboarding must survive serde round-trip"
-        );
-        let _ = fs::remove_file(&path);
-    }
-
-    #[test]
-    fn legacy_settings_without_shown_achievement_onboarding_deserializes_to_false() {
-        // A settings.json written by an older version of the game will be
-        // missing this field entirely. `#[serde(default)]` on the field
-        // must yield `false` — the cue then fires on the next win, but
-        // only when stats.games_won == 1, so existing players who have
-        // already won past their first game won't see the toast either.
-        let json = br#"{ "sfx_volume": 0.7, "first_run_complete": true }"#;
-        let s: Settings = serde_json::from_slice(json).unwrap_or_default();
-        assert!(
-            !s.shown_achievement_onboarding,
-            "legacy settings.json missing shown_achievement_onboarding must deserialize to false"
-        );
-    }
-
-    // -----------------------------------------------------------------------
-    // tooltip_delay_secs — player-tunable tooltip hover delay
-    // -----------------------------------------------------------------------
-
-    #[test]
-    fn settings_tooltip_delay_default_is_existing_baseline() {
-        // The existing baseline pre-slider is 0.5 s, matching the
-        // `MOTION_TOOLTIP_DELAY_SECS` constant in
-        // `solitaire_engine::ui_theme`. The default must not regress.
-        let s = Settings::default();
-        assert!(
-            (s.tooltip_delay_secs - 0.5).abs() < 1e-6,
-            "tooltip_delay_secs default must be 0.5 (the pre-slider baseline), got {}",
-            s.tooltip_delay_secs
-        );
-    }
-
-    #[test]
-    fn settings_tooltip_delay_round_trip() {
-        let path = tmp_path("tooltip_delay_round_trip");
-        let _ = fs::remove_file(&path);
-        let s = Settings {
-            tooltip_delay_secs: 1.2,
-            ..Settings::default()
-        };
-        save_settings_to(&path, &s).expect("save");
-        let loaded = load_settings_from(&path);
-        assert!(
-            (loaded.tooltip_delay_secs - 1.2).abs() < 1e-6,
-            "tooltip_delay_secs must survive serde round-trip; got {}",
-            loaded.tooltip_delay_secs
-        );
-        let _ = fs::remove_file(&path);
-    }
-
-    #[test]
-    fn legacy_settings_without_tooltip_delay_deserializes_to_default() {
-        // A settings.json written before this field existed must
-        // deserialize cleanly to the existing 0.5 s baseline rather
-        // than failing the whole load or yielding a zero value.
-        let json = br#"{ "sfx_volume": 0.7, "first_run_complete": true }"#;
-        let s: Settings = serde_json::from_slice(json).unwrap_or_default();
-        assert!(
-            (s.tooltip_delay_secs - default_tooltip_delay()).abs() < 1e-6,
-            "legacy settings.json missing tooltip_delay_secs must deserialize to default ({}), got {}",
-            default_tooltip_delay(),
-            s.tooltip_delay_secs
-        );
-    }
-
     #[test]
     fn adjust_tooltip_delay_clamps_to_range() {
         let mut s = Settings { tooltip_delay_secs: 0.5, ..Default::default() };
@@ -672,21 +499,57 @@ mod tests {
     }
 
     #[test]
-    fn sanitized_clamps_out_of_range_tooltip_delay() {
+    fn adjust_time_bonus_multiplier_clamps_and_rounds() {
-        // Negative or oversized values from a hand-edited file must be
+        let mut s = Settings { time_bonus_multiplier: 1.0, ..Default::default() };
-        // clamped on load.
+        // Step up to 1.1.
-        let s = Settings {
+        assert!((s.adjust_time_bonus_multiplier(0.1) - 1.1).abs() < 1e-6);
-            tooltip_delay_secs: -0.4,
+        // Big positive jump clamps to TIME_BONUS_MULTIPLIER_MAX.
-            ..Settings::default()
+        assert!(
-        }
+            (s.adjust_time_bonus_multiplier(99.0) - TIME_BONUS_MULTIPLIER_MAX).abs() < 1e-6
-        .sanitized();
+        );
-        assert_eq!(s.tooltip_delay_secs, TOOLTIP_DELAY_MIN_SECS);
+        // Big negative jump clamps to TIME_BONUS_MULTIPLIER_MIN.
+        assert!(
+            (s.adjust_time_bonus_multiplier(-99.0) - TIME_BONUS_MULTIPLIER_MIN).abs() < 1e-6
+        );
+        assert_eq!(s.time_bonus_multiplier, 0.0);
 
-        let s2 = Settings {
+        // Repeated incremental adds must not drift past the 0.1 grid.
-            tooltip_delay_secs: 99.0,
+        let mut s2 = Settings { time_bonus_multiplier: 0.0, ..Default::default() };
-            ..Settings::default()
+        for _ in 0..10 {
+            s2.adjust_time_bonus_multiplier(0.1);
         }
-        .sanitized();
+        // After ten +0.1 steps, value should be exactly 1.0 (1 decimal).
-        assert_eq!(s2.tooltip_delay_secs, TOOLTIP_DELAY_MAX_SECS);
+        assert!(
+            (s2.time_bonus_multiplier - 1.0).abs() < 1e-6,
+            "rounding should pin repeated 0.1 steps to the decimal grid, got {}",
+            s2.time_bonus_multiplier
+        );
+    }
+
+    #[test]
+    fn adjust_replay_move_interval_clamps_and_rounds() {
+        let mut s = Settings { replay_move_interval_secs: 0.45, ..Default::default() };
+        // Step down to 0.40.
+        assert!((s.adjust_replay_move_interval(-0.05) - 0.40).abs() < 1e-6);
+        // Big positive jump clamps to MAX.
+        assert!(
+            (s.adjust_replay_move_interval(99.0) - REPLAY_MOVE_INTERVAL_MAX_SECS).abs() < 1e-6
+        );
+        // Big negative jump clamps to MIN.
+        assert!(
+            (s.adjust_replay_move_interval(-99.0) - REPLAY_MOVE_INTERVAL_MIN_SECS).abs() < 1e-6
+        );
+
+        // Repeated 0.05 steps must not drift past the 0.05 grid.
+        let mut s2 = Settings { replay_move_interval_secs: 0.10, ..Default::default() };
+        for _ in 0..6 {
+            s2.adjust_replay_move_interval(0.05);
+        }
+        // After six +0.05 steps from 0.10, value should be exactly 0.40 (2 decimals).
+        assert!(
+            (s2.replay_move_interval_secs - 0.40).abs() < 1e-6,
+            "rounding should pin repeated 0.05 steps to the decimal grid, got {}",
+            s2.replay_move_interval_secs
+        );
     }
 }

solitaire_data/src/stats.rs

@@ -5,16 +5,35 @@
 //! `update_on_win` method that depends on [`DrawMode`] from `solitaire_core`.
 
 use chrono::Utc;
-use solitaire_core::game_state::DrawMode;
+use solitaire_core::game_state::{DrawMode, GameMode};
 
 pub use solitaire_sync::StatsSnapshot;
 
 /// Extension trait providing game-logic mutation helpers for [`StatsSnapshot`].
 ///
-/// Import this trait alongside `StatsSnapshot` to use `update_on_win`.
+/// Import this trait alongside `StatsSnapshot` to use `update_on_win`
+/// and [`StatsExt::update_per_mode_bests`].
 pub trait StatsExt {
     /// Updates rolling statistics from a completed game win. Call once per `GameWonEvent`.
+    ///
+    /// Tracks lifetime totals only — per-mode best scores and times are
+    /// updated separately via [`StatsExt::update_per_mode_bests`] so the
+    /// long-standing call sites that only know about [`DrawMode`] keep
+    /// compiling.
     fn update_on_win(&mut self, score: i32, time_seconds: u64, draw_mode: &DrawMode);
+
+    /// Updates the per-mode best score and fastest-win-time fields for the
+    /// given [`GameMode`]. Call alongside [`StatsExt::update_on_win`] from
+    /// the win handler.
+    ///
+    /// Behaviour:
+    /// - `Classic`, `Zen`, `Challenge`: updates the matching `*_best_score`
+    ///   (max) and `*_fastest_win_seconds` (zero-aware min — 0 means
+    ///   "no win recorded yet").
+    /// - `TimeAttack`: no-op. Time Attack uses session-level scoring (count
+    ///   of wins in 10 minutes); a per-game best wouldn't compose with
+    ///   the other modes' single-game scoring.
+    fn update_per_mode_bests(&mut self, score: i32, time_seconds: u64, mode: GameMode);
 }
 
 impl StatsExt for StatsSnapshot {
@@ -51,6 +70,43 @@ impl StatsExt for StatsSnapshot {
 
         self.last_modified = Utc::now();
     }
+
+    fn update_per_mode_bests(&mut self, score: i32, time_seconds: u64, mode: GameMode) {
+        let score_u32 = score.max(0) as u32;
+        // Zero-aware min — 0 means "no win recorded yet" for the per-mode
+        // fastest fields, so we must not let a real time get clobbered to 0.
+        // (Mirrors the merge logic in `solitaire_sync::merge`.)
+        let min_ignore_zero = |existing: u64, candidate: u64| -> u64 {
+            if existing == 0 {
+                candidate
+            } else if candidate == 0 {
+                existing
+            } else {
+                existing.min(candidate)
+            }
+        };
+        match mode {
+            GameMode::Classic => {
+                self.classic_best_score = self.classic_best_score.max(score_u32);
+                self.classic_fastest_win_seconds =
+                    min_ignore_zero(self.classic_fastest_win_seconds, time_seconds);
+            }
+            GameMode::Zen => {
+                self.zen_best_score = self.zen_best_score.max(score_u32);
+                self.zen_fastest_win_seconds =
+                    min_ignore_zero(self.zen_fastest_win_seconds, time_seconds);
+            }
+            GameMode::Challenge => {
+                self.challenge_best_score = self.challenge_best_score.max(score_u32);
+                self.challenge_fastest_win_seconds =
+                    min_ignore_zero(self.challenge_fastest_win_seconds, time_seconds);
+            }
+            // Time Attack uses its own session-level scoring; a per-game best
+            // wouldn't compose with the other modes' single-game numbers.
+            GameMode::TimeAttack => {}
+        }
+        self.last_modified = Utc::now();
+    }
 }
 
 #[cfg(test)]
@@ -177,4 +233,123 @@ mod tests {
         s.update_on_win(200, 60, &DrawMode::DrawOne);
         assert_eq!(s.lifetime_score, u64::MAX, "lifetime_score must saturate, not overflow");
     }
+
+    // -----------------------------------------------------------------------
+    // Per-mode bests
+    // -----------------------------------------------------------------------
+
+    #[test]
+    fn classic_win_updates_classic_best_score_only() {
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(1500, 200, GameMode::Classic);
+        assert_eq!(s.classic_best_score, 1500);
+        assert_eq!(s.classic_fastest_win_seconds, 200);
+        // Other modes untouched.
+        assert_eq!(s.zen_best_score, 0);
+        assert_eq!(s.zen_fastest_win_seconds, 0);
+        assert_eq!(s.challenge_best_score, 0);
+        assert_eq!(s.challenge_fastest_win_seconds, 0);
+    }
+
+    #[test]
+    fn zen_win_updates_zen_best_score_only() {
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(1800, 600, GameMode::Zen);
+        assert_eq!(s.zen_best_score, 1800);
+        assert_eq!(s.zen_fastest_win_seconds, 600);
+        assert_eq!(s.classic_best_score, 0);
+        assert_eq!(s.challenge_best_score, 0);
+    }
+
+    #[test]
+    fn challenge_win_updates_challenge_best_score_only() {
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(2400, 480, GameMode::Challenge);
+        assert_eq!(s.challenge_best_score, 2400);
+        assert_eq!(s.challenge_fastest_win_seconds, 480);
+        assert_eq!(s.classic_best_score, 0);
+        assert_eq!(s.zen_best_score, 0);
+    }
+
+    #[test]
+    fn time_attack_win_does_not_touch_per_mode_bests() {
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(9999, 1, GameMode::TimeAttack);
+        assert_eq!(s.classic_best_score, 0);
+        assert_eq!(s.zen_best_score, 0);
+        assert_eq!(s.challenge_best_score, 0);
+        assert_eq!(s.classic_fastest_win_seconds, 0);
+        assert_eq!(s.zen_fastest_win_seconds, 0);
+        assert_eq!(s.challenge_fastest_win_seconds, 0);
+    }
+
+    #[test]
+    fn per_mode_best_score_takes_max_across_calls() {
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(500, 200, GameMode::Classic);
+        s.update_per_mode_bests(200, 200, GameMode::Classic);
+        s.update_per_mode_bests(900, 200, GameMode::Classic);
+        assert_eq!(s.classic_best_score, 900);
+    }
+
+    #[test]
+    fn per_mode_fastest_uses_zero_aware_min() {
+        // First Classic win: 240s. Field starts at 0 (no win yet) — we
+        // must adopt 240, not stay at 0 like a naive `min` would.
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(100, 240, GameMode::Classic);
+        assert_eq!(s.classic_fastest_win_seconds, 240);
+        // Faster Classic win replaces it.
+        s.update_per_mode_bests(100, 120, GameMode::Classic);
+        assert_eq!(s.classic_fastest_win_seconds, 120);
+        // Slower Classic win does not.
+        s.update_per_mode_bests(100, 300, GameMode::Classic);
+        assert_eq!(s.classic_fastest_win_seconds, 120);
+    }
+
+    #[test]
+    fn negative_score_treated_as_zero_in_per_mode() {
+        let mut s = StatsSnapshot::default();
+        s.update_per_mode_bests(-50, 240, GameMode::Classic);
+        assert_eq!(s.classic_best_score, 0);
+        // Time still recorded — a win with a low score is still a win.
+        assert_eq!(s.classic_fastest_win_seconds, 240);
+    }
+
+    #[test]
+    fn legacy_stats_without_per_mode_fields_deserializes_to_zero() {
+        // A pre-per-mode `stats.json` must still deserialise cleanly:
+        // every new field falls back to 0 via `#[serde(default)]` so
+        // updating the binary never wipes the player's old stats file.
+        let legacy_json = r#"{
+            "games_played": 12,
+            "games_won": 5,
+            "games_lost": 7,
+            "win_streak_current": 1,
+            "win_streak_best": 3,
+            "avg_time_seconds": 240,
+            "fastest_win_seconds": 180,
+            "lifetime_score": 8500,
+            "best_single_score": 2200,
+            "draw_one_wins": 4,
+            "draw_three_wins": 1,
+            "last_modified": "2026-04-29T12:00:00Z"
+        }"#;
+
+        let s: StatsSnapshot = serde_json::from_str(legacy_json)
+            .expect("legacy payload must deserialise without per-mode fields");
+
+        // Pre-existing fields kept their values.
+        assert_eq!(s.games_played, 12);
+        assert_eq!(s.best_single_score, 2200);
+        assert_eq!(s.fastest_win_seconds, 180);
+
+        // Every new per-mode field defaulted to 0 ("no win yet").
+        assert_eq!(s.classic_best_score, 0);
+        assert_eq!(s.classic_fastest_win_seconds, 0);
+        assert_eq!(s.zen_best_score, 0);
+        assert_eq!(s.zen_fastest_win_seconds, 0);
+        assert_eq!(s.challenge_best_score, 0);
+        assert_eq!(s.challenge_fastest_win_seconds, 0);
+    }
 }

solitaire_data/src/storage.rs

@@ -6,7 +6,9 @@
 use std::fs;
 use std::io;
 use std::path::{Path, PathBuf};
+use std::time::{SystemTime, UNIX_EPOCH};
 
+use serde::{Deserialize, Serialize};
 use solitaire_core::game_state::{GameState, GAME_STATE_SCHEMA_VERSION};
 
 use crate::stats::StatsSnapshot;
@@ -14,11 +16,12 @@ use crate::stats::StatsSnapshot;
 const APP_DIR_NAME: &str = "solitaire_quest";
 const STATS_FILE_NAME: &str = "stats.json";
 const GAME_STATE_FILE_NAME: &str = "game_state.json";
+const TIME_ATTACK_SESSION_FILE_NAME: &str = "time_attack_session.json";
 
 /// Returns the platform-specific path to `stats.json`, or `None` if
-/// `dirs::data_dir()` is unavailable (e.g. minimal Linux containers).
+/// `crate::data_dir()` is unavailable (e.g. minimal Linux containers).
 pub fn stats_file_path() -> Option<PathBuf> {
-    dirs::data_dir().map(|d| d.join(APP_DIR_NAME).join(STATS_FILE_NAME))
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(STATS_FILE_NAME))
 }
 
 /// Load stats from an explicit path. Returns `StatsSnapshot::default()` if
@@ -66,9 +69,9 @@ pub fn save_stats(stats: &StatsSnapshot) -> io::Result<()> {
 // ---------------------------------------------------------------------------
 
 /// Returns the platform-specific path to `game_state.json`, or `None` if
-/// `dirs::data_dir()` is unavailable.
+/// `crate::data_dir()` is unavailable.
 pub fn game_state_file_path() -> Option<PathBuf> {
-    dirs::data_dir().map(|d| d.join(APP_DIR_NAME).join(GAME_STATE_FILE_NAME))
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(GAME_STATE_FILE_NAME))
 }
 
 /// Load an in-progress `GameState` from `path`. Returns `None` if the file is
@@ -126,7 +129,7 @@ pub fn delete_game_state_at(path: &Path) -> io::Result<()> {
 /// in an atomic save. Safe to call on startup; missing or unreadable entries
 /// are silently skipped.
 pub fn cleanup_orphaned_tmp_files() -> io::Result<()> {
-    let dir = match dirs::data_dir() {
+    let dir = match crate::data_dir() {
         Some(d) => d.join(APP_DIR_NAME),
         None => return Ok(()),
     };
@@ -139,6 +142,131 @@ pub fn cleanup_orphaned_tmp_files() -> io::Result<()> {
     Ok(())
 }
 
+// ---------------------------------------------------------------------------
+// Time Attack session (mode-specific sibling of game_state.json)
+// ---------------------------------------------------------------------------
+//
+// `GameState` carries `mode: GameMode`, so an in-progress Zen / Challenge /
+// Classic / TimeAttack deal is already round-tripped through `game_state.json`
+// — closing the window mid-deal in any of those modes restores the deal on
+// next launch. Time Attack adds a 10-minute session window and a per-session
+// win counter that live OUTSIDE `GameState` (in `TimeAttackResource` on the
+// engine side), so they are NOT covered by the game-state save/load. This
+// sibling file persists just that extra session-level state.
+//
+// The Bevy plugin layer (`solitaire_engine::time_attack_plugin`) is the only
+// caller. The file lives next to `game_state.json` in the same data dir and
+// is written using the same `.tmp` → rename atomic-write contract that the
+// rest of `storage.rs` uses.
+
+/// Persisted state for an in-progress Time Attack session.
+///
+/// Fields mirror the live `TimeAttackResource` minus the `active` flag (the
+/// presence of the file *is* the active flag — a missing file means no
+/// session in progress).
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct TimeAttackSession {
+    /// Seconds remaining in the 10-minute window when the save was written.
+    pub remaining_secs: f32,
+    /// Wins accumulated during the session so far.
+    pub wins: u32,
+    /// Wall-clock instant the save was written, as unix seconds. Used at
+    /// load time to detect whether the session window expired in real
+    /// time while the app was closed and to decrement `remaining_secs`
+    /// by the real elapsed time so the resumed session reflects how
+    /// long the window has actually been running.
+    pub saved_at_unix_secs: u64,
+}
+
+/// Returns the platform-specific path to `time_attack_session.json`, or
+/// `None` if `crate::data_dir()` is unavailable.
+pub fn time_attack_session_path() -> Option<PathBuf> {
+    crate::data_dir().map(|d| d.join(APP_DIR_NAME).join(TIME_ATTACK_SESSION_FILE_NAME))
+}
+
+/// Save a Time Attack session atomically. Mirrors `save_game_state_to`'s
+/// `.tmp` → rename contract.
+pub fn save_time_attack_session_to(path: &Path, session: &TimeAttackSession) -> io::Result<()> {
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)?;
+    }
+    let json = serde_json::to_string_pretty(session).map_err(io::Error::other)?;
+    let tmp = path.with_extension("json.tmp");
+    fs::write(&tmp, json.as_bytes())?;
+    fs::rename(&tmp, path)?;
+    Ok(())
+}
+
+/// Load a Time Attack session from `path`, decrementing `remaining_secs`
+/// by the wall-clock time elapsed between the save and now.
+///
+/// Returns `None` when:
+/// - the file is missing or unreadable,
+/// - the JSON is corrupt / malformed, or
+/// - the session window expired during the time the app was closed
+///   (`saved_at_unix_secs + remaining_secs <= now_unix_secs`).
+///
+/// The `now_unix_secs` parameter is injectable so unit tests can simulate
+/// arbitrary wall-clock gaps without touching the real system clock. The
+/// public companion [`load_time_attack_session_from`] resolves "now" from
+/// `SystemTime::now()`.
+pub fn load_time_attack_session_from_at(
+    path: &Path,
+    now_unix_secs: u64,
+) -> Option<TimeAttackSession> {
+    let data = fs::read(path).ok()?;
+    let session: TimeAttackSession = serde_json::from_slice(&data).ok()?;
+    // Compute wall-clock elapsed seconds since the save was written.
+    // Saturating subtraction guards against a clock that moved backwards
+    // (rare, but possible across NTP corrections or VM clock drift).
+    let elapsed = now_unix_secs.saturating_sub(session.saved_at_unix_secs);
+    let remaining = session.remaining_secs - elapsed as f32;
+    if remaining <= 0.0 {
+        return None;
+    }
+    Some(TimeAttackSession {
+        remaining_secs: remaining,
+        wins: session.wins,
+        saved_at_unix_secs: session.saved_at_unix_secs,
+    })
+}
+
+/// Load a Time Attack session from `path`, using `SystemTime::now()` as
+/// the reference for the wall-clock-elapsed adjustment.
+///
+/// See [`load_time_attack_session_from_at`] for the rules under which
+/// the call returns `None` (missing file, corrupt JSON, expired window).
+pub fn load_time_attack_session_from(path: &Path) -> Option<TimeAttackSession> {
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map_or(0, |d| d.as_secs());
+    load_time_attack_session_from_at(path, now)
+}
+
+/// Delete the Time Attack session file (called on session end, on session
+/// start, or on game completion). Silently ignores `NotFound` errors.
+pub fn delete_time_attack_session_at(path: &Path) -> io::Result<()> {
+    match fs::remove_file(path) {
+        Ok(()) => Ok(()),
+        Err(e) if e.kind() == io::ErrorKind::NotFound => Ok(()),
+        Err(e) => Err(e),
+    }
+}
+
+/// Convenience helper for callers that want to stamp a session with the
+/// current wall-clock time. Equivalent to constructing the struct
+/// manually and setting `saved_at_unix_secs` to `SystemTime::now()`.
+pub fn time_attack_session_with_now(remaining_secs: f32, wins: u32) -> TimeAttackSession {
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map_or(0, |d| d.as_secs());
+    TimeAttackSession {
+        remaining_secs,
+        wins,
+        saved_at_unix_secs: now,
+    }
+}
+
 /// Inner helper: delete `*.json.tmp` entries inside `dir`.
 ///
 /// Per-file errors (already deleted, permission denied) are silently ignored.
@@ -387,4 +515,190 @@ mod tests {
         let loaded = load_stats_from(&stats_path);
         assert_eq!(loaded, StatsSnapshot::default());
     }
+
+    // -----------------------------------------------------------------------
+    // Time Attack session persistence
+    //
+    // Documents the contract that closing the window mid-Time-Attack does
+    // NOT lose the 10-minute window or the running win count. Classic /
+    // Zen / Challenge are covered by `game_state.json` because their entire
+    // mid-deal state lives in `GameState.mode` + `GameState.piles`; Time
+    // Attack additionally needs the session timer + wins counter, both of
+    // which live in `TimeAttackResource` on the engine side and are NOT
+    // part of `GameState`. This sibling file persists exactly that.
+    // -----------------------------------------------------------------------
+
+    fn ta_path(name: &str) -> PathBuf {
+        env::temp_dir().join(format!("solitaire_test_ta_{name}.json"))
+    }
+
+    /// Round-trip a session that was saved "just now" (zero wall-clock
+    /// elapsed). All three persisted fields must come back unchanged.
+    #[test]
+    fn time_attack_session_round_trips_through_save_and_load() {
+        let path = ta_path("round_trip");
+        let _ = fs::remove_file(&path);
+
+        // Use a fixed unix timestamp so the load step (which receives the
+        // SAME timestamp as "now") sees zero wall-clock elapsed.
+        let saved_at: u64 = 1_800_000_000;
+        let session = TimeAttackSession {
+            remaining_secs: 240.0,
+            wins: 3,
+            saved_at_unix_secs: saved_at,
+        };
+        save_time_attack_session_to(&path, &session).expect("save");
+
+        let loaded = load_time_attack_session_from_at(&path, saved_at)
+            .expect("session must load when not yet expired");
+        assert!(
+            (loaded.remaining_secs - 240.0).abs() < 0.01,
+            "remaining_secs must be unchanged when no wall-clock time has passed; got {}",
+            loaded.remaining_secs,
+        );
+        assert_eq!(loaded.wins, 3, "wins must round-trip");
+        assert_eq!(loaded.saved_at_unix_secs, saved_at, "timestamp must round-trip");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// A session whose window expired entirely between launches must be
+    /// discarded on load — the caller starts fresh rather than resuming a
+    /// dead session.
+    #[test]
+    fn time_attack_session_discarded_when_expired_between_launches() {
+        let path = ta_path("expired");
+        let _ = fs::remove_file(&path);
+
+        // Saved 20 minutes ago with 240 s remaining — long expired.
+        let saved_at: u64 = 1_800_000_000;
+        let session = TimeAttackSession {
+            remaining_secs: 240.0,
+            wins: 5,
+            saved_at_unix_secs: saved_at,
+        };
+        save_time_attack_session_to(&path, &session).expect("save");
+
+        // 20 minutes (1200 s) later → 240 - 1200 = -960 s remaining.
+        let now = saved_at + 1200;
+        assert!(
+            load_time_attack_session_from_at(&path, now).is_none(),
+            "an expired session must return None so the player starts fresh",
+        );
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// The `remaining_secs` returned at load time must be the persisted
+    /// value minus the wall-clock seconds that elapsed while the app was
+    /// closed.
+    #[test]
+    fn time_attack_session_remaining_secs_decremented_by_real_elapsed() {
+        let path = ta_path("decremented");
+        let _ = fs::remove_file(&path);
+
+        let saved_at: u64 = 1_800_000_000;
+        let session = TimeAttackSession {
+            remaining_secs: 240.0,
+            wins: 2,
+            saved_at_unix_secs: saved_at,
+        };
+        save_time_attack_session_to(&path, &session).expect("save");
+
+        // 60 s elapsed in real time → expect 180 s remaining.
+        let now = saved_at + 60;
+        let loaded = load_time_attack_session_from_at(&path, now)
+            .expect("session must still load — 180 s left");
+        assert!(
+            (loaded.remaining_secs - 180.0).abs() < 5.0,
+            "remaining_secs ≈ 180 ± 5 s after a 60 s wall-clock gap; got {}",
+            loaded.remaining_secs,
+        );
+        assert_eq!(loaded.wins, 2, "wins must survive the elapsed adjustment");
+
+        let _ = fs::remove_file(&path);
+    }
+
+    /// Atomic-write contract — `.tmp` must not be left behind after
+    /// `save_time_attack_session_to` returns.
+    #[test]
+    fn time_attack_session_save_is_atomic() {
+        let path = ta_path("atomic");
+        let session = TimeAttackSession {
+            remaining_secs: 100.0,
+            wins: 0,
+            saved_at_unix_secs: 1_800_000_000,
+        };
+        save_time_attack_session_to(&path, &session).expect("save");
+        let tmp = path.with_extension("json.tmp");
+        assert!(!tmp.exists(), ".tmp must be cleaned up after rename");
+        let _ = fs::remove_file(&path);
+    }
+
+    /// Loading from a path that does not exist must return `None`, not
+    /// panic.
+    #[test]
+    fn time_attack_session_missing_file_returns_none() {
+        let path = ta_path("missing_xyz");
+        let _ = fs::remove_file(&path);
+        assert!(load_time_attack_session_from_at(&path, 0).is_none());
+    }
+
+    /// Loading from a corrupt / partially-written file must return `None`,
+    /// not surface a deserialiser error.
+    #[test]
+    fn time_attack_session_corrupt_file_returns_none() {
+        let path = ta_path("corrupt");
+        fs::write(&path, b"not valid json!!!").expect("write");
+        assert!(load_time_attack_session_from_at(&path, 0).is_none());
+        let _ = fs::remove_file(&path);
+    }
+
+    /// `delete_time_attack_session_at` removes the file when it exists
+    /// and returns `Ok(())` when it does not.
+    #[test]
+    fn time_attack_session_delete_handles_present_and_absent() {
+        let path = ta_path("delete");
+        let session = TimeAttackSession {
+            remaining_secs: 50.0,
+            wins: 0,
+            saved_at_unix_secs: 1_800_000_000,
+        };
+        save_time_attack_session_to(&path, &session).expect("save");
+        assert!(path.exists());
+        delete_time_attack_session_at(&path).expect("delete");
+        assert!(!path.exists());
+        // Second delete on the now-absent file must succeed.
+        delete_time_attack_session_at(&path).expect("missing-file delete is ok");
+    }
+
+    /// A session whose `saved_at_unix_secs` is in the future (e.g. the
+    /// system clock moved backward across NTP correction) must NOT be
+    /// rejected as expired. Saturating subtraction must clamp the
+    /// "elapsed" value to zero.
+    #[test]
+    fn time_attack_session_handles_clock_running_backwards() {
+        let path = ta_path("clock_backwards");
+        let _ = fs::remove_file(&path);
+
+        let saved_at: u64 = 1_800_000_000;
+        let session = TimeAttackSession {
+            remaining_secs: 60.0,
+            wins: 1,
+            saved_at_unix_secs: saved_at,
+        };
+        save_time_attack_session_to(&path, &session).expect("save");
+
+        // "now" is BEFORE the saved time — should not crash, should not expire.
+        let now_in_past = saved_at - 100;
+        let loaded = load_time_attack_session_from_at(&path, now_in_past)
+            .expect("clock-backwards must not discard the session");
+        assert!(
+            (loaded.remaining_secs - 60.0).abs() < 0.01,
+            "remaining_secs must clamp elapsed to 0 when clock ran backwards; got {}",
+            loaded.remaining_secs,
+        );
+
+        let _ = fs::remove_file(&path);
+    }
 }

solitaire_data/src/sync_client.rs

@@ -16,6 +16,7 @@ use solitaire_sync::{ChallengeGoal, LeaderboardEntry, SyncPayload, SyncResponse}
 
 use crate::{
     auth_tokens::{load_access_token, load_refresh_token, store_tokens},
+    replay::Replay,
     settings::SyncBackend,
     SyncError, SyncProvider,
 };
@@ -356,6 +357,69 @@ impl SyncProvider for SolitaireServerClient {
 
         extract_leaderboard_body(resp).await
     }
+
+    /// Upload a winning replay to `POST /api/replays`. On success the
+    /// server returns `{ "id": "<uuid>" }`; this method composes that
+    /// id with the configured base URL into the player-shareable
+    /// `<base>/replays/<id>` link and returns it. Mirrors the `push`
+    /// auth flow: 401 triggers a token refresh and one retry.
+    async fn push_replay(&self, replay: &Replay) -> Result<String, SyncError> {
+        let token = self.access_token()?;
+        let url = format!("{}/api/replays", self.base_url);
+
+        let resp = self
+            .client
+            .post(&url)
+            .bearer_auth(&token)
+            .json(replay)
+            .send()
+            .await
+            .map_err(|e| SyncError::Network(e.to_string()))?;
+
+        if resp.status() == reqwest::StatusCode::UNAUTHORIZED {
+            self.refresh_token().await?;
+            let new_token = self.access_token()?;
+            let resp = self
+                .client
+                .post(&url)
+                .bearer_auth(new_token)
+                .json(replay)
+                .send()
+                .await
+                .map_err(|e| SyncError::Network(e.to_string()))?;
+            return self.share_url_from_response(resp).await;
+        }
+
+        self.share_url_from_response(resp).await
+    }
+}
+
+impl SolitaireServerClient {
+    /// Pulled out of `push_replay` so both the first attempt and the
+    /// post-401-retry attempt go through the same parse path.
+    async fn share_url_from_response(
+        &self,
+        resp: reqwest::Response,
+    ) -> Result<String, SyncError> {
+        let status = resp.status();
+        if !status.is_success() {
+            return Err(if status == reqwest::StatusCode::UNAUTHORIZED
+                || status == reqwest::StatusCode::FORBIDDEN
+            {
+                SyncError::Auth(format!("server returned {status}"))
+            } else {
+                SyncError::Network(format!("server returned {status}"))
+            });
+        }
+        let body: serde_json::Value = resp
+            .json()
+            .await
+            .map_err(|e| SyncError::Serialization(e.to_string()))?;
+        let id = body["id"].as_str().ok_or_else(|| {
+            SyncError::Serialization("upload response missing `id`".into())
+        })?;
+        Ok(format!("{}/replays/{}", self.base_url, id))
+    }
 }
 
 // ---------------------------------------------------------------------------

solitaire_engine/Cargo.toml

@@ -22,6 +22,16 @@ ron            = { workspace = true }
 dirs           = { workspace = true }
 zip            = { workspace = true }
 
+# `arboard` provides clipboard access for the Stats overlay's
+# "Copy share link" button. The crate has no Android backend
+# (its `platform::Clipboard` module is unimplemented for the
+# android target — `cargo apk build` fails with E0433 if this is
+# left unconditional). On Android the same button surfaces an
+# informational toast instead; see
+# `stats_plugin::handle_copy_share_link_button`.
+[target.'cfg(not(target_os = "android"))'.dependencies]
+arboard        = { workspace = true }
+
 [dev-dependencies]
 async-trait = { workspace = true }
 tempfile    = { workspace = true }

solitaire_engine/src/achievement_plugin.rs

@@ -7,6 +7,7 @@
 
 use std::path::PathBuf;
 
+use bevy::input::mouse::{MouseScrollUnit, MouseWheel};
 use bevy::prelude::*;
 use chrono::{Local, Timelike, Utc};
 use solitaire_core::achievement::{
@@ -25,11 +26,13 @@ use crate::events::{
 use crate::font_plugin::FontResource;
 use crate::game_plugin::GameMutation;
 use crate::progress_plugin::{LevelUpEvent, ProgressResource, ProgressStoragePath, ProgressUpdate};
+use crate::replay_playback::ReplayPlaybackState;
 use crate::resources::GameStateResource;
 use crate::settings_plugin::{SettingsResource, SettingsStoragePath};
 use crate::stats_plugin::{StatsResource, StatsUpdate};
 use crate::ui_modal::{
     spawn_modal, spawn_modal_actions, spawn_modal_button, spawn_modal_header, ButtonVariant,
+    ScrimDismissible,
 };
 use crate::ui_theme::{
     ACCENT_PRIMARY, BORDER_SUBTLE, STATE_SUCCESS, TEXT_DISABLED, TEXT_PRIMARY, TEXT_SECONDARY,
@@ -47,6 +50,19 @@ pub struct AchievementsScreen;
 #[derive(Component, Debug)]
 pub struct AchievementRow;
 
+/// Marker on the scrollable body Node inside the Achievements modal.
+///
+/// The Achievements list can grow to ~19 rows which overflows the modal at
+/// the 800x600 minimum window. This marker tags the inner container that
+/// carries `Overflow::scroll_y()` plus a `max_height` constraint so the
+/// content scrolls instead of clipping. Mirrors the
+/// `SettingsPanelScrollable` pattern in `settings_plugin`.
+///
+/// `scroll_achievements_panel` reads this marker to route mouse-wheel
+/// events into the body's `ScrollPosition`.
+#[derive(Component, Debug)]
+pub struct AchievementsScrollable;
+
 /// All per-player achievement records (one per known achievement).
 #[derive(Resource, Debug, Clone)]
 pub struct AchievementsResource(pub Vec<AchievementRecord>);
@@ -95,6 +111,11 @@ impl Plugin for AchievementPlugin {
             .add_message::<XpAwardedEvent>()
             .add_message::<InfoToastEvent>()
             .add_message::<ToggleAchievementsRequestEvent>()
+            // `MouseWheel` is emitted by Bevy's input plugin under
+            // `DefaultPlugins`; register it explicitly so the
+            // achievements-scroll system also runs cleanly under
+            // `MinimalPlugins` in tests.
+            .add_message::<MouseWheel>()
             // Run after GameMutation (so GameWonEvent is available), after
             // StatsUpdate (so stats reflect this win), and after ProgressUpdate
             // (so daily_challenge_streak is up to date for daily_devotee).
@@ -116,7 +137,13 @@ impl Plugin for AchievementPlugin {
                     .after(StatsUpdate),
             )
             .add_systems(Update, toggle_achievements_screen)
-            .add_systems(Update, handle_achievements_close_button);
+            .add_systems(Update, handle_achievements_close_button)
+            .add_systems(Update, scroll_achievements_panel)
+            // Event-driven unlock: observe `ReplayPlaybackState` and unlock
+            // `cinephile` the first time playback runs to natural completion.
+            // Reads the resource via `Option<Res<_>>` so headless tests that
+            // omit `ReplayPlaybackPlugin` still build.
+            .add_systems(Update, evaluate_cinephile_on_replay_completion);
     }
 }
 
@@ -222,6 +249,66 @@ fn evaluate_on_win(
             }
 }
 
+/// Cinephile unlock observer.
+///
+/// Watches [`ReplayPlaybackState`] and unlocks the `cinephile` achievement
+/// the first time the resource transitions from `Playing` to `Completed` —
+/// i.e. the player watched a saved replay all the way through. The Stop
+/// button transitions `Playing` → `Inactive` directly (never via
+/// `Completed`), so manual aborts do not trigger the unlock.
+///
+/// Idempotent: once the record is unlocked, subsequent Playing → Completed
+/// transitions are a no-op (no extra `AchievementUnlockedEvent`, no extra
+/// disk write). The transition itself is debounced by tracking the
+/// previous frame's `is_playing()` state in a `Local<bool>` — without
+/// this, a freshly-spawned `Completed` state would re-fire each frame
+/// during the linger window.
+///
+/// Reads `ReplayPlaybackState` via `Option<Res<_>>` so achievement tests
+/// that omit `ReplayPlaybackPlugin` still build cleanly.
+fn evaluate_cinephile_on_replay_completion(
+    state: Option<Res<ReplayPlaybackState>>,
+    // `Local` collides with `chrono::Local` imported at the top of this
+    // module — fully qualify so the Bevy system parameter resolves
+    // correctly.
+    mut last_was_playing: bevy::prelude::Local<bool>,
+    mut achievements: ResMut<AchievementsResource>,
+    mut unlocks: MessageWriter<AchievementUnlockedEvent>,
+    path: Res<AchievementsStoragePath>,
+) {
+    let Some(state) = state else {
+        return;
+    };
+
+    // Detect the Playing → Completed transition: was playing last frame,
+    // is now completed. Direct Playing → Inactive (Stop button) does not
+    // satisfy this guard because it never enters `Completed`.
+    let now_playing = state.is_playing();
+    let now_completed = state.is_completed();
+    let just_completed = *last_was_playing && now_completed;
+    *last_was_playing = now_playing;
+
+    if !just_completed {
+        return;
+    }
+
+    let Some(record) = achievements.0.iter_mut().find(|r| r.id == "cinephile") else {
+        return;
+    };
+    if record.unlocked {
+        return;
+    }
+    record.unlock(Utc::now());
+    record.reward_granted = true;
+    unlocks.write(AchievementUnlockedEvent(record.clone()));
+
+    if let Some(target) = &path.0
+        && let Err(e) = save_achievements_to(target, &achievements.0)
+    {
+        warn!("failed to save achievements after cinephile unlock: {e}");
+    }
+}
+
 /// Achievement-onboarding cue.
 ///
 /// On the player's very first win — and only their first — fires a single
@@ -329,6 +416,38 @@ fn handle_achievements_close_button(
     }
 }
 
+/// Routes mouse-wheel events into the Achievements modal's scrollable body
+/// while the panel is open.
+///
+/// `offset_y` increases downward (0 = top). Scrolling down (`ev.y < 0`) adds
+/// to the offset; scrolling up subtracts. Clamped to >= 0 so the viewport
+/// never scrolls past the top. Mirrors `scroll_settings_panel` in
+/// `settings_plugin`. The query is empty when no `AchievementsScrollable`
+/// is in the world (modal closed) so this is a no-op outside the open
+/// state without an explicit gate resource.
+fn scroll_achievements_panel(
+    mut scroll_evr: MessageReader<MouseWheel>,
+    mut scrollables: Query<&mut ScrollPosition, With<AchievementsScrollable>>,
+) {
+    if scrollables.is_empty() {
+        scroll_evr.clear();
+        return;
+    }
+    let delta_y: f32 = scroll_evr
+        .read()
+        .map(|ev| match ev.unit {
+            MouseScrollUnit::Line => ev.y * 50.0,
+            MouseScrollUnit::Pixel => ev.y,
+        })
+        .sum();
+    if delta_y == 0.0 {
+        return;
+    }
+    for mut sp in scrollables.iter_mut() {
+        sp.0.y = (sp.0.y - delta_y).max(0.0);
+    }
+}
+
 fn spawn_achievements_screen(
     commands: &mut Commands,
     records: &[AchievementRecord],
@@ -355,16 +474,55 @@ fn spawn_achievements_screen(
         ..default()
     };
 
-    spawn_modal(commands, AchievementsScreen, Z_MODAL_PANEL, |card| {
+    let any_unlocked = records.iter().any(|r| r.unlocked);
+
+    let scrim = spawn_modal(commands, AchievementsScreen, Z_MODAL_PANEL, |card| {
         spawn_modal_header(card, header, font_res);
 
+        // First-time hint — shown until the player has unlocked anything.
+        // The list itself describes individual rewards, but a top-level
+        // explanation gives newer players context for the otherwise dense
+        // greyed-out grid.
+        if !any_unlocked {
+            card.spawn((
+                Text::new(
+                    "Complete games and try new modes to unlock achievements and rewards.",
+                ),
+                TextFont {
+                    font: font_res.map(|f| f.0.clone()).unwrap_or_default(),
+                    font_size: TYPE_CAPTION,
+                    ..default()
+                },
+                TextColor(TEXT_SECONDARY),
+            ));
+        }
+
+        // Scrollable body — the achievements list grows to ~19 rows which
+        // overflows the modal on the 800x600 minimum window. Wrapping the
+        // row list in an `Overflow::scroll_y()` Node with a constrained
+        // `max_height` keeps every row reachable. The Done button below
+        // sits outside the scroll so it's always one click away. Mirrors
+        // the `SettingsPanelScrollable` pattern.
+        card.spawn((
+            AchievementsScrollable,
+            ScrollPosition::default(),
+            Node {
+                flex_direction: FlexDirection::Column,
+                row_gap: VAL_SPACE_1,
+                max_height: Val::Vh(70.0),
+                overflow: Overflow::scroll_y(),
+                ..default()
+            },
+        ))
+        .with_children(|body| {
             // Achievement rows — unlocked first, then locked alphabetical.
             let mut sorted: Vec<_> = records.iter().collect();
             sorted.sort_by_key(|r| (!r.unlocked, r.id.clone()));
 
             for record in &sorted {
                 let def = achievement_by_id(&record.id);
-            let (name, description) = def.map_or((record.id.as_str(), ""), |d| (d.name, d.description));
+                let (name, description) =
+                    def.map_or((record.id.as_str(), ""), |d| (d.name, d.description));
 
                 // Hide secret locked achievements so they remain a surprise.
                 let is_secret = def.is_some_and(|d| d.secret);
@@ -380,7 +538,7 @@ fn spawn_achievements_screen(
 
                 let tooltip_text = tooltip_for_row(record.unlocked, def);
 
-            card.spawn((
+                body.spawn((
                     Node {
                         flex_direction: FlexDirection::Column,
                         row_gap: VAL_SPACE_1,
@@ -419,7 +577,7 @@ fn spawn_achievements_screen(
                 });
 
                 // Subtle row separator — keeps the long list scannable.
-            card.spawn((
+                body.spawn((
                     Node {
                         height: Val::Px(1.0),
                         ..default()
@@ -427,6 +585,7 @@ fn spawn_achievements_screen(
                     BackgroundColor(BORDER_SUBTLE),
                 ));
             }
+        });
 
         spawn_modal_actions(card, |actions| {
             spawn_modal_button(
@@ -439,6 +598,9 @@ fn spawn_achievements_screen(
             );
         });
     });
+    // Achievements is a read-only list — clicking the scrim outside
+    // the card dismisses alongside the existing A / Done paths.
+    commands.entity(scrim).insert(ScrimDismissible);
 }
 
 fn format_reward(reward: Reward) -> String {
@@ -829,6 +991,64 @@ mod tests {
         assert_eq!(count, 0);
     }
 
+    // -----------------------------------------------------------------------
+    // Scrollable body
+    // -----------------------------------------------------------------------
+
+    /// Spawning the modal must place exactly one `AchievementsScrollable`
+    /// marker in the world so the row list scrolls instead of clipping at
+    /// the 800x600 minimum window.
+    #[test]
+    fn achievements_modal_body_is_scrollable() {
+        let mut app = headless_app();
+        press(&mut app, KeyCode::KeyA);
+        app.update();
+
+        let count = app
+            .world_mut()
+            .query::<&AchievementsScrollable>()
+            .iter(app.world())
+            .count();
+        assert_eq!(
+            count, 1,
+            "Achievements modal must spawn exactly one AchievementsScrollable body"
+        );
+    }
+
+    /// The scrollable body must constrain its `max_height` so the modal
+    /// actually engages scrolling on tall content. Without this the inner
+    /// flex column would expand to fit every row and `Overflow::scroll_y`
+    /// would have nothing to clip.
+    #[test]
+    fn achievements_modal_body_has_max_height() {
+        let mut app = headless_app();
+        press(&mut app, KeyCode::KeyA);
+        app.update();
+
+        let mut q = app
+            .world_mut()
+            .query_filtered::<&Node, With<AchievementsScrollable>>();
+        let nodes: Vec<&Node> = q.iter(app.world()).collect();
+        assert_eq!(nodes.len(), 1, "expected exactly one scrollable body");
+        let node = nodes[0];
+
+        // `Val::Auto` is the default; assert the body's `max_height` was
+        // explicitly set to something else so scroll engages.
+        assert_ne!(
+            node.max_height,
+            Val::Auto,
+            "scrollable body must set a non-default max_height; got {:?}",
+            node.max_height
+        );
+        // And the overflow axis must be y-scroll.
+        assert_eq!(
+            node.overflow,
+            Overflow::scroll_y(),
+            "scrollable body must use Overflow::scroll_y(); got {:?}",
+            node.overflow
+        );
+    }
+
     // -----------------------------------------------------------------------
     // format_reward
     // -----------------------------------------------------------------------
@@ -1149,9 +1369,215 @@ mod tests {
         );
     }
 
-    /// Without any `GameWonEvent` arriving the system must be a no-op:
+    // -----------------------------------------------------------------------
-    /// no toast, no flag flip — even on update ticks where stats happen
+    // Cinephile (event-driven via ReplayPlaybackState)
-    /// to read `games_won == 1`.
+    // -----------------------------------------------------------------------
+
+    use crate::replay_playback::ReplayPlaybackState;
+    use solitaire_data::{Replay, ReplayMove};
+    use chrono::NaiveDate;
+    use solitaire_core::game_state::{DrawMode, GameMode};
+
+    /// Headless app variant that injects a default `ReplayPlaybackState`
+    /// directly (no `ReplayPlaybackPlugin`) so we can drive the resource
+    /// by hand. The achievement plugin's cinephile observer reads it via
+    /// `Option<Res<_>>` so the absence of the playback plugin is safe.
+    fn cinephile_app() -> App {
+        let mut app = headless_app();
+        app.init_resource::<ReplayPlaybackState>();
+        app
+    }
+
+    fn dummy_replay() -> Replay {
+        Replay::new(
+            1,
+            DrawMode::DrawOne,
+            GameMode::Classic,
+            10,
+            100,
+            NaiveDate::from_ymd_opt(2026, 5, 5).expect("valid date"),
+            vec![ReplayMove::StockClick],
+        )
+    }
+
+    fn cinephile_unlocked(app: &App) -> bool {
+        app.world()
+            .resource::<AchievementsResource>()
+            .0
+            .iter()
+            .find(|r| r.id == "cinephile")
+            .map(|r| r.unlocked)
+            .unwrap_or(false)
+    }
+
+    fn cinephile_unlocks_emitted(app: &App) -> usize {
+        let events = app.world().resource::<Messages<AchievementUnlockedEvent>>();
+        let mut cursor = events.get_cursor();
+        cursor
+            .read(events)
+            .filter(|e| e.0.id == "cinephile")
+            .count()
+    }
+
+    /// The cinephile record must be seeded on plugin init like every other
+    /// achievement, so the observer can find and mutate it later.
+    #[test]
+    fn cinephile_record_seeded_by_plugin() {
+        let app = cinephile_app();
+        let records = &app.world().resource::<AchievementsResource>().0;
+        assert!(
+            records.iter().any(|r| r.id == "cinephile" && !r.unlocked),
+            "cinephile record must be seeded as locked",
+        );
+    }
+
+    /// Drive Inactive → Playing → Completed and assert the cinephile
+    /// achievement unlocks and exactly one `AchievementUnlockedEvent` is
+    /// emitted.
+    #[test]
+    fn cinephile_unlocks_on_replay_completion() {
+        let mut app = cinephile_app();
+
+        // Frame 1: enter Playing. The observer's first sample sees
+        // `last_was_playing = false` and `now_playing = true`.
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Playing {
+                replay: dummy_replay(),
+                cursor: 0,
+                secs_to_next: 0.0,
+            };
+        app.update();
+        assert!(
+            !cinephile_unlocked(&app),
+            "Playing alone must not unlock cinephile",
+        );
+
+        // Frame 2: transition to Completed. The observer must detect
+        // `last_was_playing = true && now_completed = true` and unlock.
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Completed;
+        app.update();
+
+        assert!(
+            cinephile_unlocked(&app),
+            "cinephile must unlock on Playing → Completed transition",
+        );
+        assert_eq!(
+            cinephile_unlocks_emitted(&app),
+            1,
+            "exactly one AchievementUnlockedEvent must fire for cinephile",
+        );
+    }
+
+    /// Stop button transitions Playing → Inactive directly (not via
+    /// Completed). Drive that path and assert no cinephile unlock.
+    #[test]
+    fn cinephile_does_not_unlock_on_stop_button_abort() {
+        let mut app = cinephile_app();
+
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Playing {
+                replay: dummy_replay(),
+                cursor: 0,
+                secs_to_next: 0.0,
+            };
+        app.update();
+
+        // Direct Playing → Inactive — the path the Stop button takes via
+        // `stop_replay_playback`. Must not unlock cinephile.
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Inactive;
+        app.update();
+
+        assert!(
+            !cinephile_unlocked(&app),
+            "Stop button (Playing → Inactive) must not unlock cinephile",
+        );
+        assert_eq!(
+            cinephile_unlocks_emitted(&app),
+            0,
+            "no AchievementUnlockedEvent for cinephile on a Stop transition",
+        );
+    }
+
+    /// A second Playing → Completed cycle on an already-unlocked record
+    /// must be idempotent: no additional `AchievementUnlockedEvent`.
+    #[test]
+    fn cinephile_does_not_double_fire() {
+        let mut app = cinephile_app();
+
+        // First completion cycle to unlock.
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Playing {
+                replay: dummy_replay(),
+                cursor: 0,
+                secs_to_next: 0.0,
+            };
+        app.update();
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Completed;
+        app.update();
+        assert!(cinephile_unlocked(&app), "precondition: first cycle must unlock");
+
+        // Drain the event queue so the next assertion doesn't double-count
+        // the legitimate first-time unlock event.
+        app.world_mut()
+            .resource_mut::<Messages<AchievementUnlockedEvent>>()
+            .clear();
+
+        // Second cycle: Inactive → Playing → Completed once more.
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Inactive;
+        app.update();
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Playing {
+                replay: dummy_replay(),
+                cursor: 0,
+                secs_to_next: 0.0,
+            };
+        app.update();
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Completed;
+        app.update();
+
+        assert_eq!(
+            cinephile_unlocks_emitted(&app),
+            0,
+            "cinephile must not re-fire on a second Playing → Completed cycle",
+        );
+    }
+
+    /// `Completed` lingers across multiple frames before the auto-clear
+    /// transitions back to `Inactive`. The observer must fire exactly
+    /// once during that linger window — not once per frame.
+    #[test]
+    fn cinephile_fires_once_across_completed_linger() {
+        let mut app = cinephile_app();
+
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Playing {
+                replay: dummy_replay(),
+                cursor: 0,
+                secs_to_next: 0.0,
+            };
+        app.update();
+        *app.world_mut().resource_mut::<ReplayPlaybackState>() =
+            ReplayPlaybackState::Completed;
+        app.update();
+        // Stay in Completed for a few more frames as the real auto-clear
+        // does. Each subsequent frame the resource is still `Completed`
+        // but the observer has already counted this transition.
+        app.update();
+        app.update();
+        app.update();
+
+        assert_eq!(
+            cinephile_unlocks_emitted(&app),
+            1,
+            "cinephile must fire exactly once across the Completed linger window",
+        );
+    }
+
     #[test]
     fn no_win_event_means_no_achievement_onboarding_toast() {
         let mut app = onboarding_test_app();

solitaire_engine/src/animation_plugin.rs

@@ -21,7 +21,7 @@ use crate::card_animation::{sample_curve, CardAnimation, MotionCurve};
 use crate::card_plugin::CardEntity;
 use crate::challenge_plugin::ChallengeAdvancedEvent;
 use crate::daily_challenge_plugin::{DailyChallengeCompletedEvent, DailyGoalAnnouncementEvent};
-use crate::events::{InfoToastEvent, NewGameConfirmEvent, XpAwardedEvent};
+use crate::events::{InfoToastEvent, XpAwardedEvent};
 use crate::events::{AchievementUnlockedEvent, GameWonEvent};
 use crate::game_plugin::GameMutation;
 use crate::layout::LayoutResource;
@@ -30,8 +30,9 @@ use crate::progress_plugin::LevelUpEvent;
 use crate::settings_plugin::{SettingsChangedEvent, SettingsResource};
 use crate::time_attack_plugin::TimeAttackEndedEvent;
 use crate::ui_theme::{
-    scaled_duration, ACCENT_PRIMARY, MOTION_CASCADE_SLIDE_SECS, MOTION_CASCADE_STAGGER_SECS,
+    scaled_duration, ACCENT_SECONDARY, BG_ELEVATED, MOTION_CASCADE_SLIDE_SECS,
-    MOTION_SLIDE_SECS, TEXT_PRIMARY, VAL_SPACE_2, VAL_SPACE_3, VAL_SPACE_4, Z_TOAST,
+    MOTION_CASCADE_STAGGER_SECS, MOTION_SLIDE_SECS, RADIUS_MD, STATE_DANGER, STATE_INFO,
+    STATE_WARNING, TEXT_PRIMARY, TYPE_BODY_LG, VAL_SPACE_2, VAL_SPACE_3, VAL_SPACE_4, Z_TOAST,
 };
 use crate::weekly_goals_plugin::WeeklyGoalCompletedEvent;
 
@@ -61,7 +62,6 @@ fn anim_speed_to_secs(speed: &AnimSpeed) -> f32 {
     scaled_duration(MOTION_SLIDE_SECS, *speed)
 }
 
-const WIN_TOAST_SECS: f32 = 4.0;
 const ACHIEVEMENT_TOAST_SECS: f32 = 3.0;
 const LEVELUP_TOAST_SECS: f32 = 3.0;
 const DAILY_TOAST_SECS: f32 = 3.0;
@@ -161,7 +161,6 @@ impl Plugin for AnimationPlugin {
             .add_message::<TimeAttackEndedEvent>()
             .add_message::<ChallengeAdvancedEvent>()
             .add_message::<SettingsChangedEvent>()
-            .add_message::<NewGameConfirmEvent>()
             .add_message::<InfoToastEvent>()
             .add_message::<XpAwardedEvent>()
             .init_resource::<EffectiveSlideDuration>()
@@ -183,7 +182,6 @@ impl Plugin for AnimationPlugin {
                     handle_challenge_toast,
                     handle_settings_toast,
                     handle_auto_complete_toast,
-                    handle_new_game_confirm_toast,
                     handle_xp_awarded_toast,
                     tick_toasts,
                     (enqueue_toasts, drive_toast_display).chain(),
@@ -268,9 +266,15 @@ fn handle_win_cascade(
     layout: Option<Res<LayoutResource>>,
     settings: Option<Res<SettingsResource>>,
 ) {
-    let Some(ev) = events.read().next() else {
+    // Drain the event reader; the cascade visual is the only thing
+    // this system contributes — the post-win "You Won!" modal
+    // (`win_summary_plugin`) consumes the same `GameWonEvent` and
+    // carries score / time / achievements / XP itself, so a duplicate
+    // toast saying "You Win! Score X Time Y" rendered behind the modal
+    // in earlier builds. Removed.
+    if events.read().next().is_none() {
         return;
-    };
+    }
 
     let margin = layout.as_ref().map_or(800.0, |l| l.0.card_size.x * 8.0);
 
@@ -286,11 +290,6 @@ fn handle_win_cascade(
         Vec3::new(-margin, 0.0, 300.0),
     ];
 
-    let m = ev.time_seconds / 60;
-    let s = ev.time_seconds % 60;
-    let win_msg = format!("You Win!  Score: {}  Time: {m}:{s:02}", ev.score);
-    spawn_toast(&mut commands, win_msg, WIN_TOAST_SECS);
-
     let step = settings
         .as_ref()
         .map_or(CASCADE_STAGGER_NORMAL, |s| cascade_step_secs(s.0.animation_speed));
@@ -341,6 +340,7 @@ fn handle_achievement_toast(
             &mut commands,
             format!("Achievement: {}", display_name_for(&ev.0.id)),
             ACHIEVEMENT_TOAST_SECS,
+            ToastVariant::Celebration,
         );
     }
 }
@@ -351,6 +351,7 @@ fn handle_levelup_toast(mut commands: Commands, mut events: MessageReader<LevelU
             &mut commands,
             format!("Level Up! → {}", ev.new_level),
             LEVELUP_TOAST_SECS,
+            ToastVariant::Celebration,
         );
     }
 }
@@ -360,7 +361,12 @@ fn handle_daily_goal_announcement_toast(
     mut events: MessageReader<DailyGoalAnnouncementEvent>,
 ) {
     for ev in events.read() {
-        spawn_toast(&mut commands, format!("Goal: {}", ev.0), DAILY_TOAST_SECS);
+        spawn_toast(
+            &mut commands,
+            format!("Goal: {}", ev.0),
+            DAILY_TOAST_SECS,
+            ToastVariant::Info,
+        );
     }
 }
 
@@ -373,6 +379,7 @@ fn handle_daily_toast(
             &mut commands,
             format!("Daily Challenge Complete! (Streak: {})", ev.streak),
             DAILY_TOAST_SECS,
+            ToastVariant::Celebration,
         );
     }
 }
@@ -386,6 +393,7 @@ fn handle_weekly_toast(
             &mut commands,
             format!("Weekly Goal: {}", ev.description),
             WEEKLY_TOAST_SECS,
+            ToastVariant::Celebration,
         );
     }
 }
@@ -399,6 +407,7 @@ fn handle_time_attack_toast(
             &mut commands,
             format!("Time Attack: {} win{}", ev.wins, if ev.wins == 1 { "" } else { "s" }),
             TIME_ATTACK_TOAST_SECS,
+            ToastVariant::Info,
         );
     }
 }
@@ -412,6 +421,7 @@ fn handle_challenge_toast(
             &mut commands,
             format!("Challenge {} cleared!", ev.previous_index.saturating_add(1)),
             CHALLENGE_TOAST_SECS,
+            ToastVariant::Celebration,
         );
     }
 }
@@ -431,11 +441,21 @@ fn handle_settings_toast(
         *last_music = Some(music);
         if sfx_changed {
             let pct = (sfx * 100.0).round() as i32;
-            spawn_toast(&mut commands, format!("SFX: {pct}%"), VOLUME_TOAST_SECS);
+            spawn_toast(
+                &mut commands,
+                format!("SFX: {pct}%"),
+                VOLUME_TOAST_SECS,
+                ToastVariant::Info,
+            );
         }
         if music_changed {
             let pct = (music * 100.0).round() as i32;
-            spawn_toast(&mut commands, format!("Music: {pct}%"), VOLUME_TOAST_SECS);
+            spawn_toast(
+                &mut commands,
+                format!("Music: {pct}%"),
+                VOLUME_TOAST_SECS,
+                ToastVariant::Info,
+            );
         }
     }
 }
@@ -451,7 +471,12 @@ fn handle_auto_complete_toast(
         if s.active {
             if !*shown {
                 *shown = true;
-                spawn_toast(&mut commands, "Auto-completing…".to_string(), 2.0);
+                spawn_toast(
+                    &mut commands,
+                    "Auto-completing…".to_string(),
+                    2.0,
+                    ToastVariant::Info,
+                );
             }
         } else {
             *shown = false;
@@ -459,15 +484,6 @@ fn handle_auto_complete_toast(
     }
 }
 
-fn handle_new_game_confirm_toast(
-    mut commands: Commands,
-    mut events: MessageReader<NewGameConfirmEvent>,
-) {
-    for _ in events.read() {
-        spawn_toast(&mut commands, "Press N again to start a new game".to_string(), 3.0);
-    }
-}
-
 /// Reads every incoming `InfoToastEvent` and appends its text to `ToastQueue`.
 ///
 /// This is the first half of the two-system toast queue (Task #67). The queue
@@ -524,37 +540,72 @@ fn drive_toast_display(
         }
 }
 
-/// Spawns a centered top-of-screen `ToastEntity` for the queued toast system.
+/// Visual variant of a toast — drives the 1px border accent per the
+/// design-system toast spec
+/// (`docs/ui-mockups/design-system.md` → "Toasts").
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum ToastVariant {
+    /// Neutral system message — teal border. Default for `InfoToastEvent`,
+    /// settings volume notifications, and the auto-complete announcement.
+    Info,
+    /// Caution / penalty — gold border. Currently unused by an in-engine
+    /// event; kept so future warning-flavoured toasts have a slot.
+    #[allow(dead_code)]
+    Warning,
+    /// Failure / rejected action — pink border. Currently unused; kept so
+    /// future error-flavoured toasts have a slot.
+    #[allow(dead_code)]
+    Error,
+    /// Reward / milestone — lavender border. Used for XP awards,
+    /// achievement unlocks, level-ups, daily/weekly/challenge completions.
+    Celebration,
+}
+
+impl ToastVariant {
+    /// Returns the 1px border accent for this variant per the design
+    /// system. Single source of truth — `spawn_toast` and
+    /// `spawn_queued_toast` both consume it so a future palette swap
+    /// only has to touch the token, never every call site.
+    fn border_color(self) -> Color {
+        match self {
+            ToastVariant::Info => STATE_INFO,
+            ToastVariant::Warning => STATE_WARNING,
+            ToastVariant::Error => STATE_DANGER,
+            ToastVariant::Celebration => ACCENT_SECONDARY,
+        }
+    }
+}
+
+/// Spawns a bottom-anchored `ToastEntity` for the queued toast system.
+///
+/// Queued toasts always carry [`ToastVariant::Info`] — the queue is fed
+/// by [`InfoToastEvent`] which is by definition neutral system info.
+/// Variants other than `Info` belong on the immediate-fire path
+/// ([`spawn_toast`]) where the call site knows the semantic intent.
 fn spawn_queued_toast(commands: &mut Commands, message: String) -> Entity {
-    commands
+    spawn_toast_node(
-        .spawn((
+        commands,
         ToastEntity,
-            Node {
+        message,
-                position_type: PositionType::Absolute,
+        ToastVariant::Info,
-                left: Val::Percent(15.0),
+        // Slightly taller anchor than the immediate-fire path so a
-                top: Val::Percent(8.0),
+        // queued info banner doesn't collide with a celebration toast
-                width: Val::Percent(70.0),
+        // fired in the same frame.
-                padding: UiRect::axes(VAL_SPACE_4, VAL_SPACE_2),
+        Val::Percent(6.0),
-                justify_content: JustifyContent::Center,
+        Val::Percent(15.0),
-                align_items: AlignItems::Center,
+        Val::Percent(70.0),
-                ..default()
+        UiRect::axes(VAL_SPACE_4, VAL_SPACE_2),
-            },
+    )
-            BackgroundColor(Color::srgba(0.0, 0.0, 0.0, 0.60)),
-            ZIndex(Z_TOAST),
-        ))
-        .with_children(|b| {
-            b.spawn((
-                Text::new(message),
-                TextFont { font_size: 22.0, ..default() },
-                TextColor(TEXT_PRIMARY),
-            ));
-        })
-        .id()
 }
 
 fn handle_xp_awarded_toast(mut commands: Commands, mut events: MessageReader<XpAwardedEvent>) {
     for ev in events.read() {
-        spawn_toast(&mut commands, format!("+{} XP", ev.amount), 3.0);
+        spawn_toast(
+            &mut commands,
+            format!("+{} XP", ev.amount),
+            3.0,
+            ToastVariant::Celebration,
+        );
     }
 }
 
@@ -580,33 +631,88 @@ fn tick_toasts(
     }
 }
 
-fn spawn_toast(commands: &mut Commands, message: String, duration_secs: f32) {
+/// Spawns a bottom-anchored fire-and-forget toast that despawns after
+/// `duration_secs`. The `variant` selects the 1px accent border color
+/// per the design-system toast spec.
+fn spawn_toast(
+    commands: &mut Commands,
+    message: String,
+    duration_secs: f32,
+    variant: ToastVariant,
+) {
+    spawn_toast_node(
+        commands,
+        (ToastOverlay, ToastTimer(duration_secs)),
+        message,
+        variant,
+        // Sits above the queued banner so a celebration toast spawned
+        // alongside a queued info message remains readable.
+        Val::Percent(14.0),
+        Val::Percent(25.0),
+        Val::Percent(50.0),
+        UiRect::axes(VAL_SPACE_4, VAL_SPACE_3),
+    );
+}
+
+/// Common toast-spawn primitive used by both the queued and the
+/// fire-and-forget paths. Centralizes the design-system contract so a
+/// future spec change (e.g. a different border thickness) is a
+/// one-line edit.
+///
+/// The Terminal toast spec from `design-system.md`:
+/// - Opaque [`BG_ELEVATED`] fill (no translucent dim).
+/// - 1px border in the variant's accent color.
+/// - [`TYPE_BODY_LG`] (18px) `TEXT_PRIMARY` caption — the spec calls
+///   for 16px, but the engine type scale only carries 14/18/26/40/...
+///   rungs; 18 is the closest rung that preserves the scale invariants
+///   tested in `ui_theme::tests`.
+/// - [`RADIUS_MD`] corners.
+/// - Bottom-anchored absolute position; `bottom_pct` differs between
+///   queued and immediate paths so they layer instead of overlap.
+// The 8-argument signature is intentional — these are the per-toast
+// layout values that genuinely differ between the queued and fire-and-
+// forget call sites. A struct wrapper would just rename the same data.
+#[allow(clippy::too_many_arguments)]
+fn spawn_toast_node<B: Bundle>(
+    commands: &mut Commands,
+    bundle: B,
+    message: String,
+    variant: ToastVariant,
+    bottom_pct: Val,
+    left_pct: Val,
+    width_pct: Val,
+    padding: UiRect,
+) -> Entity {
     commands
         .spawn((
-            ToastOverlay,
+            bundle,
-            ToastTimer(duration_secs),
             Node {
                 position_type: PositionType::Absolute,
-                left: Val::Percent(25.0),
+                left: left_pct,
-                top: Val::Percent(42.0),
+                bottom: bottom_pct,
-                width: Val::Percent(50.0),
+                width: width_pct,
-                padding: UiRect::axes(VAL_SPACE_4, VAL_SPACE_3),
+                padding,
                 justify_content: JustifyContent::Center,
                 align_items: AlignItems::Center,
+                border: UiRect::all(Val::Px(1.0)),
+                border_radius: BorderRadius::all(Val::Px(RADIUS_MD)),
                 ..default()
             },
-            BackgroundColor(Color::srgba(0.0, 0.0, 0.0, 0.72)),
+            BackgroundColor(BG_ELEVATED),
+            BorderColor::all(variant.border_color()),
+            ZIndex(Z_TOAST),
         ))
         .with_children(|b| {
             b.spawn((
                 Text::new(message),
                 TextFont {
-                    font_size: 32.0,
+                    font_size: TYPE_BODY_LG,
                     ..default()
                 },
-                TextColor(ACCENT_PRIMARY),
+                TextColor(TEXT_PRIMARY),
             ));
-        });
+        })
+        .id()
 }
 
 #[cfg(test)]
@@ -714,6 +820,41 @@ mod tests {
         assert!(anim_speed_to_secs(&AnimSpeed::Fast) < anim_speed_to_secs(&AnimSpeed::Normal));
     }
 
+    /// Pin every `ToastVariant` to its design-system border colour.
+    /// A future palette swap that touches `STATE_INFO`, `STATE_WARNING`,
+    /// `STATE_DANGER`, or `ACCENT_SECONDARY` flows through this mapping
+    /// automatically; this test guards against accidental remappings.
+    #[test]
+    fn toast_variant_border_colors_match_design_tokens() {
+        assert_eq!(ToastVariant::Info.border_color(), STATE_INFO);
+        assert_eq!(ToastVariant::Warning.border_color(), STATE_WARNING);
+        assert_eq!(ToastVariant::Error.border_color(), STATE_DANGER);
+        assert_eq!(ToastVariant::Celebration.border_color(), ACCENT_SECONDARY);
+    }
+
+    /// Every `ToastVariant` resolves to a unique border colour so a
+    /// careless rebinding (e.g. accidentally setting `Warning` to the
+    /// same hue as `Info`) fails loudly. Pure check — does not run a
+    /// Bevy app.
+    #[test]
+    fn toast_variant_border_colors_are_distinct() {
+        let colors = [
+            ToastVariant::Info.border_color(),
+            ToastVariant::Warning.border_color(),
+            ToastVariant::Error.border_color(),
+            ToastVariant::Celebration.border_color(),
+        ];
+        for i in 0..colors.len() {
+            for j in (i + 1)..colors.len() {
+                assert_ne!(
+                    format!("{:?}", colors[i]),
+                    format!("{:?}", colors[j]),
+                    "variants {i} and {j} resolved to the same border colour",
+                );
+            }
+        }
+    }
+
     #[test]
     fn anim_speed_instant_is_zero() {
         assert_eq!(anim_speed_to_secs(&AnimSpeed::Instant), 0.0);

solitaire_engine/src/assets/mod.rs

@@ -11,8 +11,8 @@ pub mod svg_loader;
 pub mod user_dir;
 
 pub use sources::{
-    populate_embedded_default_theme, register_theme_asset_sources, AssetSourcesPlugin,
+    default_theme_svg_bytes, populate_embedded_default_theme, register_theme_asset_sources,
-    DEFAULT_THEME_MANIFEST_URL, USER_THEMES,
+    AssetSourcesPlugin, DEFAULT_THEME_MANIFEST_URL, USER_THEMES,
 };
 pub use svg_loader::{rasterize_svg, SvgLoader, SvgLoaderError, SvgLoaderSettings};
 pub use user_dir::{set_user_theme_dir, user_theme_dir};

solitaire_engine/src/assets/sources.rs

@@ -194,6 +194,25 @@ impl Plugin for AssetSourcesPlugin {
     }
 }
 
+/// Returns the embedded SVG bytes for a single default-theme file
+/// (e.g. `"back.svg"` or `"spades_ace.svg"`), or `None` when the
+/// filename is not bundled.
+///
+/// The thumbnail generator in
+/// [`crate::theme::ThemeThumbnailCache`] uses this to rasterise
+/// preview-sized art for the picker UI without going through Bevy's
+/// async asset graph. Lookup is by the filename only — the
+/// `solitaire_engine/assets/themes/default/` prefix is stripped before
+/// comparison so callers don't need to know where the embedded files
+/// live in the binary.
+pub fn default_theme_svg_bytes(filename: &str) -> Option<&'static [u8]> {
+    let suffix = format!("/{filename}");
+    DEFAULT_THEME_SVGS
+        .iter()
+        .find(|(path, _)| path.ends_with(&suffix))
+        .map(|(_, bytes)| *bytes)
+}
+
 /// Pushes every bundled default-theme file into the
 /// [`EmbeddedAssetRegistry`] under its stable URL. Keeping this in a
 /// free function (and not inside the `Plugin::build` body) means the
@@ -291,6 +310,29 @@ mod tests {
         assert_eq!(faces.len(), 52);
     }
 
+    /// `default_theme_svg_bytes` resolves the canonical preview pair
+    /// the thumbnail cache rasterises: `back.svg` and `spades_ace.svg`.
+    /// Both must exist in the embedded table or the picker's preview
+    /// thumbnails would silently fall back to placeholders even for the
+    /// always-present default theme.
+    #[test]
+    fn default_theme_svg_bytes_finds_back_and_ace_of_spades() {
+        assert!(
+            default_theme_svg_bytes("back.svg").is_some(),
+            "default theme must bundle a back.svg"
+        );
+        assert!(
+            default_theme_svg_bytes("spades_ace.svg").is_some(),
+            "default theme must bundle a spades_ace.svg"
+        );
+    }
+
+    #[test]
+    fn default_theme_svg_bytes_returns_none_for_unknown_file() {
+        assert!(default_theme_svg_bytes("nope.svg").is_none());
+        assert!(default_theme_svg_bytes("").is_none());
+    }
+
     /// Belt-and-braces: if anyone edits `DEFAULT_THEME_MANIFEST_PATH`
     /// without updating `DEFAULT_THEME_MANIFEST_URL` (or vice versa)
     /// the asset would register at one path and be loaded from

solitaire_engine/src/assets/user_dir.rs

@@ -1,13 +1,12 @@
 //! Per-platform resolution of the user-themes directory.
 //!
 //! The path is determined exactly once and exposed via
-//! [`user_theme_dir`]. On desktop platforms it is derived from
+//! [`user_theme_dir`]. The base directory comes from
-//! `dirs::data_dir()` (matching the rest of the project's
+//! [`solitaire_data::data_dir`] (desktop: `dirs::data_dir()`;
-//! per-app-storage convention); on mobile it must be supplied by the
+//! Android: the hardcoded `/data/data/<package>/files` sandbox
-//! platform entry point via [`set_user_theme_dir`] before any code
+//! path). Mobile entry points may still override the path via
-//! that needs the path executes — there is deliberately no silent
+//! [`set_user_theme_dir`] when they need to point at a non-default
-//! fallback because mobile sandboxing makes any guess we'd hard-code
+//! location (e.g. tests, custom AssetManager wiring).
-//! wrong.
 //!
 //! # Why panic instead of returning Result?
 //!
@@ -35,17 +34,18 @@ const APP_DIR_NAME: &str = "solitaire_quest";
 /// Sub-folder under [`APP_DIR_NAME`] dedicated to user themes.
 const THEME_DIR_NAME: &str = "themes";
 
-/// Sets the user-themes directory at runtime — mobile-only API.
+/// Sets the user-themes directory at runtime — escape hatch for
+/// embedders or tests that need to override the platform default.
 ///
 /// Returns `Err` containing the rejected path if the override has
 /// already been set. The first caller wins and subsequent calls are
 /// silently a no-op-with-feedback so a mis-configured embedder can't
 /// flip the path mid-session.
 ///
-/// On desktop platforms this is functional but unnecessary —
+/// Mostly unnecessary now that [`solitaire_data::data_dir`] handles
-/// [`user_theme_dir`] derives the path from `dirs::data_dir` directly
+/// every supported target — the override is kept for tests and for
-/// and ignores the override. Setting it on desktop is harmless but
+/// embedders that want a non-default location (e.g. a sandboxed
-/// nearly always a sign of confusion.
+/// AssetManager root on a future iOS port).
 pub fn set_user_theme_dir(path: PathBuf) -> Result<(), PathBuf> {
     USER_THEME_DIR_OVERRIDE.set(path)
 }
@@ -55,16 +55,10 @@ pub fn set_user_theme_dir(path: PathBuf) -> Result<(), PathBuf> {
 ///
 /// # Panics
 ///
-/// Panics on:
+/// Panics if [`solitaire_data::data_dir`] returns `None`, which on
-///
+/// desktop indicates a broken `$HOME` / `$XDG_*` configuration.
-/// - Desktop, if `dirs::data_dir()` returns `None` (rare; usually
+/// Android always returns `Some`. The panic message names the
-///   indicates a broken `$HOME` or `$XDG_*` configuration).
+/// supported workaround ([`set_user_theme_dir`]).
-/// - Mobile, if no entry point has called [`set_user_theme_dir`] yet.
-/// - Any other target, where the embedder is required to supply the
-///   path manually.
-///
-/// The panic message names the missing piece so the failure is
-/// immediately actionable.
 pub fn user_theme_dir() -> PathBuf {
     if let Some(p) = USER_THEME_DIR_OVERRIDE.get() {
         return p.clone();
@@ -79,12 +73,15 @@ fn user_theme_dir_for(data_dir: PathBuf) -> PathBuf {
     data_dir.join(APP_DIR_NAME).join(THEME_DIR_NAME)
 }
 
-/// Per-target-os resolution of the platform's data dir. Split out so
+/// Per-target-os resolution of the platform's data dir. Delegates
-/// mobile branches can grow without disturbing desktop behaviour.
+/// to [`solitaire_data::data_dir`] which encapsulates the
+/// per-target shape (desktop: `dirs::data_dir()`; android: the
+/// hardcoded `/data/data/<package>/files` sandbox path). Panics
+/// only when the underlying resolver returns `None`, which on
+/// desktop indicates a broken `$HOME` / `$XDG_*` configuration —
+/// the panic message names the supported workaround.
 fn detected_platform_data_dir() -> PathBuf {
-    #[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
+    solitaire_data::data_dir().unwrap_or_else(|| {
-    {
-        dirs::data_dir().unwrap_or_else(|| {
         panic!(
             "user_theme_dir(): platform data directory is unavailable. \
              On Linux check $XDG_DATA_HOME or $HOME; on macOS / Windows \
@@ -95,31 +92,6 @@ fn detected_platform_data_dir() -> PathBuf {
     })
 }
 
-    #[cfg(any(target_os = "android", target_os = "ios"))]
-    {
-        panic!(
-            "user_theme_dir(): mobile entry point must call \
-             solitaire_engine::assets::user_dir::set_user_theme_dir() \
-             before App::run() — there is no platform default."
-        )
-    }
-
-    #[cfg(not(any(
-        target_os = "linux",
-        target_os = "macos",
-        target_os = "windows",
-        target_os = "android",
-        target_os = "ios"
-    )))]
-    {
-        panic!(
-            "user_theme_dir(): unsupported platform; call \
-             solitaire_engine::assets::user_dir::set_user_theme_dir() \
-             from your entry point before App::run()."
-        )
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -140,14 +112,16 @@ mod tests {
         assert_eq!(dir, PathBuf::from("solitaire_quest/themes"));
     }
 
-    #[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
     #[test]
     fn detected_data_dir_yields_a_path_with_a_parent() {
-        // On every supported desktop platform the OS reports a
+        // On every supported target the platform resolver
-        // user-writable data directory; the test machine already has
+        // (`solitaire_data::data_dir`) returns a usable directory:
-        // one for `dirs::data_dir()` to discover. We don't pin the
+        // desktop targets via `dirs::data_dir()` (the test machine
-        // exact value because it depends on the user's $HOME, but it
+        // already has a `$HOME` for it to discover), Android via
-        // must at least be a non-empty path with a parent component.
+        // the hardcoded `/data/data/<package>/files` sandbox path.
+        // We don't pin the exact value because it depends on the
+        // user's `$HOME` on desktop, but it must at least be a
+        // non-empty path with a parent component.
         let dir = detected_platform_data_dir();
         assert!(dir.parent().is_some(), "data dir {dir:?} should be absolute");
     }

solitaire_engine/src/card_plugin.rs

@@ -29,12 +29,13 @@ use crate::layout::{Layout, LayoutResource, LayoutSystem};
 use crate::pause_plugin::PausedResource;
 use crate::resources::{DragState, GameStateResource};
 use crate::settings_plugin::{SettingsChangedEvent, SettingsResource};
-use crate::table_plugin::PileMarker;
+use crate::table_plugin::{PileMarker, PILE_MARKER_DEFAULT_COLOUR};
 use crate::font_plugin::FontResource;
 use crate::ui_theme::{
     CARD_SHADOW_ALPHA_DRAG, CARD_SHADOW_ALPHA_IDLE, CARD_SHADOW_COLOR, CARD_SHADOW_LOCAL_Z,
     CARD_SHADOW_OFFSET_DRAG, CARD_SHADOW_OFFSET_IDLE, CARD_SHADOW_PADDING_DRAG,
-    CARD_SHADOW_PADDING_IDLE, STOCK_BADGE_BG, STOCK_BADGE_FG, TYPE_CAPTION, Z_STOCK_BADGE,
+    CARD_SHADOW_PADDING_IDLE, STOCK_BADGE_BG, STOCK_BADGE_FG, TEXT_PRIMARY, TYPE_CAPTION,
+    Z_STOCK_BADGE,
 };
 
 /// Fraction of card height used as vertical offset between face-up tableau cards.
@@ -925,12 +926,17 @@ fn update_drag_shadow(
             commands.entity(e).insert(Transform::from_translation(shadow_pos));
         }
         None => {
-            // Spawn a new shadow sprite.
+            // Spawn a new shadow sprite. Alpha tracks the per-card
+            // CARD_SHADOW_ALPHA_DRAG token so the Terminal palette's
+            // "no box-shadow" policy disables this stack shadow in
+            // lockstep with the per-card shadows. Re-enabling shadows
+            // is then a one-line change in `ui_theme`, not a hunt
+            // through plugin code.
             let e = commands
                 .spawn((
                     ShadowEntity,
                     Sprite {
-                        color: Color::srgba(0.0, 0.0, 0.0, 0.35),
+                        color: CARD_SHADOW_COLOR.with_alpha(CARD_SHADOW_ALPHA_DRAG),
                         custom_size: Some(Vec2::new(card_w + 8.0, card_h + 8.0)),
                         ..default()
                     },
@@ -1024,11 +1030,13 @@ fn tick_hint_highlight(
 // Task #46 — Right-click legal destination highlights
 // ---------------------------------------------------------------------------
 
-/// Color applied to a `PileMarker` sprite when it is a legal destination for
+/// Lime tint applied to a `PileMarker` sprite when it is a legal
-/// the right-clicked card.
+/// destination for the right-clicked card. Same RGB as the design-
-const RIGHT_CLICK_HIGHLIGHT_COLOUR: Color = Color::srgba(0.2, 0.8, 0.2, 0.6);
+/// system [`STATE_SUCCESS`] token at 60% alpha. Spelled as a literal
-/// Restored color for `PileMarker` sprites when the highlight is cleared.
+/// because `Alpha::with_alpha` is not yet a `const` trait method on
-const PILE_MARKER_DEFAULT_COLOUR: Color = Color::srgba(1.0, 1.0, 1.0, 0.08);
+/// stable; the tracking test below pins the RGB to `STATE_SUCCESS`
+/// so a palette swap can't drift the two apart silently.
+const RIGHT_CLICK_HIGHLIGHT_COLOUR: Color = Color::srgba(0.675, 0.761, 0.404, 0.6);
 
 /// Counts down `RightClickHighlightTimer` each frame and clears the highlight
 /// when the timer expires.
@@ -1238,11 +1246,16 @@ fn find_top_card_at(
 // ---------------------------------------------------------------------------
 
 /// Sprite colour applied to the stock `PileMarker` when the stock pile is empty,
-/// to signal to the player that there are no more cards to draw.
+/// to signal to the player that there are no more cards to draw. Pure white
+/// at 0.4 alpha — a deliberate brightness-boost over the default marker so
+/// the "empty" state is more visible, not less. Not derived from a palette
+/// token: this is a sprite tint, not chrome colour.
 const STOCK_EMPTY_DIM_COLOUR: Color = Color::srgba(1.0, 1.0, 1.0, 0.4);
 
-/// Sprite colour applied to the stock `PileMarker` when cards remain in stock.
+/// Sprite colour applied to the stock `PileMarker` when cards remain in
-const STOCK_NORMAL_COLOUR: Color = Color::srgba(1.0, 1.0, 1.0, 0.08);
+/// stock. Aliased to [`PILE_MARKER_DEFAULT_COLOUR`] so it tracks the rest
+/// of the engine's idle pile-marker tint automatically.
+const STOCK_NORMAL_COLOUR: Color = PILE_MARKER_DEFAULT_COLOUR;
 
 /// Shared logic for updating the stock pile marker's dim state and "↺" label.
 ///
@@ -1283,7 +1296,7 @@ fn apply_stock_empty_indicator<F: bevy::ecs::query::QueryFilter>(
                         StockEmptyLabel,
                         Text2d::new("↺"),
                         TextFont { font_size, ..default() },
-                        TextColor(Color::srgba(1.0, 1.0, 1.0, 0.7)),
+                        TextColor(TEXT_PRIMARY.with_alpha(0.7)),
                         Transform::from_xyz(0.0, 0.0, 0.1),
                     ));
                 });
@@ -2329,9 +2342,15 @@ mod tests {
 
         assert_ne!(idle_offset, drag_offset, "drag offset must differ from idle");
         assert_ne!(idle_padding, drag_padding, "drag padding must differ from idle");
+        // Under the Terminal design system both alphas are pinned to 0
+        // (depth comes from 1px borders + tonal layering, no `box-shadow`).
+        // The invariant we still enforce is "drag never weaker than idle"
+        // — so an accidental swap of the two constants fails loudly,
+        // and a future palette that re-enables shadows still has to keep
+        // the lift cue stronger than the rest state.
         assert!(
-            drag_alpha > idle_alpha,
+            drag_alpha >= idle_alpha,
-            "drag alpha must be stronger than idle (got drag={drag_alpha}, idle={idle_alpha})"
+            "drag alpha must not be weaker than idle (got drag={drag_alpha}, idle={idle_alpha})"
         );
         // Drag offset magnitude should be larger than idle so the parallax
         // reads as "lifted".
@@ -2700,4 +2719,20 @@ mod tests {
             "after a theme apply the theme_back slot must hold the theme's back handle",
         );
     }
+
+    /// `RIGHT_CLICK_HIGHLIGHT_COLOUR` is spelled as a literal because
+    /// `Alpha::with_alpha` is not a `const` trait method on stable.
+    /// This test pins its RGB to the design-system `STATE_SUCCESS`
+    /// token so a future palette swap that updates the token but
+    /// forgets the right-click highlight fails loudly here.
+    #[test]
+    fn right_click_highlight_rgb_tracks_state_success_token() {
+        use crate::ui_theme::STATE_SUCCESS;
+        let highlight = RIGHT_CLICK_HIGHLIGHT_COLOUR.to_srgba();
+        let success = STATE_SUCCESS.to_srgba();
+        assert!((highlight.red - success.red).abs() < 1e-6);
+        assert!((highlight.green - success.green).abs() < 1e-6);
+        assert!((highlight.blue - success.blue).abs() < 1e-6);
+        assert!((highlight.alpha - 0.6).abs() < 1e-6);
+    }
 }

solitaire_engine/src/cursor_plugin.rs

@@ -2,9 +2,19 @@
 //!
 //! **Cursor icons** (`update_cursor_icon`)
 //! - Cards are being dragged → `Grabbing` (closed hand)
+//! - A UI `Button` entity is hovered (and no drag in progress) → `Pointer`
+//!   (the hand-with-extended-index-finger icon). This telegraphs
+//!   clickability for every modal button, HUD action, mode-launcher
+//!   card, settings toggle, etc.
 //! - Cursor hovers over a face-up draggable card → `Grab` (open hand)
 //! - Otherwise → `Default` (arrow)
 //!
+//! Priority order: dragging > button-hover > card-hover > default. A
+//! button-overlapping-a-card edge case favours `Pointer` because UI
+//! elements take precedence over world-space cards; in practice
+//! buttons are always on UI nodes and cards are sprites, so they
+//! cannot occupy the same hit region simultaneously.
+//!
 //! **Drop-target highlights** (`update_drop_highlights`)
 //! While a drag is in progress every `PileMarker` sprite is tinted:
 //! - **Green** if the dragged stack can legally land there.
@@ -31,17 +41,28 @@ use solitaire_core::rules::{can_place_on_foundation, can_place_on_tableau};
 use crate::card_plugin::{RightClickHighlight, TABLEAU_FAN_FRAC};
 use crate::layout::{Layout, LayoutResource};
 use crate::resources::{DragState, GameStateResource};
-use crate::table_plugin::PileMarker;
+use crate::table_plugin::{PileMarker, PILE_MARKER_DEFAULT_COLOUR};
 use crate::ui_theme::{
     DROP_TARGET_FILL, DROP_TARGET_OUTLINE, DROP_TARGET_OUTLINE_PX, Z_DROP_OVERLAY,
 };
 
-/// Semi-transparent white that `table_plugin` uses for idle pile markers.
+/// Idle pile-marker tint — re-exported from `table_plugin` so the
-/// Kept in sync with the `marker_colour` constant there.
+/// "valid drop" toggle in this plugin and the marker spawn in
-const MARKER_DEFAULT: Color = Color::srgba(1.0, 1.0, 1.0, 0.08);
+/// `table_plugin` cannot drift apart. Was previously a duplicated
+/// literal kept in sync via doc comment.
+const MARKER_DEFAULT: Color = PILE_MARKER_DEFAULT_COLOUR;
 
-/// Green tint applied to pile markers that are valid drop targets during drag.
+/// Lime tint applied to pile markers that are valid drop targets during
-const MARKER_VALID: Color = Color::srgba(0.15, 0.85, 0.25, 0.55);
+/// a drag. Same RGB as the design-system [`STATE_SUCCESS`] token at 55%
+/// alpha, so the in-game "this is a legal target" colour stays
+/// consistent with foundation-completion flourishes and other
+/// valid-move signals. Spelled as a literal because `Alpha::with_alpha`
+/// is not yet a `const` trait method on stable; the tracking test
+/// below pins the RGB to `STATE_SUCCESS` so a palette swap can't drift
+/// the two apart silently. Distinct from [`DROP_TARGET_FILL`] (10%
+/// alpha) because the marker sprite is thin and would otherwise wash
+/// out at a similar opacity.
+const MARKER_VALID: Color = Color::srgba(0.675, 0.761, 0.404, 0.55);
 
 /// Marker component on a parent entity that owns one drop-target overlay
 /// (a translucent fill plus four outline edges as children). The wrapped
@@ -70,6 +91,31 @@ impl Plugin for CursorPlugin {
 // #31 — Cursor icon
 // ---------------------------------------------------------------------------
 
+/// Pure decision function for the cursor icon, separated from the Bevy
+/// system so it can be unit-tested without `PrimaryWindow` /
+/// `Camera` / `Time` plumbing.
+///
+/// Priority order (highest first):
+/// 1. `is_dragging` → `Grabbing`
+/// 2. `any_button_hovered` → `Pointer`
+/// 3. `any_card_hovered` → `Grab`
+/// 4. otherwise → `Default`
+fn pick_cursor_icon(
+    is_dragging: bool,
+    any_button_hovered: bool,
+    any_card_hovered: bool,
+) -> SystemCursorIcon {
+    if is_dragging {
+        SystemCursorIcon::Grabbing
+    } else if any_button_hovered {
+        SystemCursorIcon::Pointer
+    } else if any_card_hovered {
+        SystemCursorIcon::Grab
+    } else {
+        SystemCursorIcon::Default
+    }
+}
+
 /// Updates the primary-window cursor icon based on drag state and hover.
 fn update_cursor_icon(
     drag: Res<DragState>,
@@ -77,18 +123,27 @@ fn update_cursor_icon(
     cameras: Query<(&Camera, &GlobalTransform)>,
     layout: Option<Res<LayoutResource>>,
     game: Option<Res<GameStateResource>>,
+    button_q: Query<&Interaction, With<Button>>,
     mut commands: Commands,
 ) {
     let Ok((win_entity, window)) = windows.single() else { return };
 
-    if !drag.is_idle() {
+    let is_dragging = !drag.is_idle();
-        commands
-            .entity(win_entity)
-            .insert(CursorIcon::from(SystemCursorIcon::Grabbing));
-        return;
-    }
 
-    let hovering = (|| {
+    // A UI button is "hovered" if any `Button` entity has its
+    // `Interaction` set to `Hovered` or `Pressed`. We include
+    // `Pressed` so the pointer icon stays visible while a click is
+    // being held, matching browser behaviour.
+    let any_button_hovered = button_q
+        .iter()
+        .any(|i| matches!(i, Interaction::Hovered | Interaction::Pressed));
+
+    let any_card_hovered = if is_dragging || any_button_hovered {
+        // No need to do the world-space hit test when a higher
+        // priority branch already wins.
+        false
+    } else {
+        (|| {
             let cursor = window.cursor_position()?;
             let (camera, cam_xf) = cameras.single().ok()?;
             let world = camera.viewport_to_world_2d(cam_xf, cursor).ok()?;
@@ -96,13 +151,11 @@ fn update_cursor_icon(
             let game = game.as_ref()?;
             Some(cursor_over_draggable(world, &game.0, &layout))
         })()
-    .unwrap_or(false);
+        .unwrap_or(false)
+    };
 
-    commands.entity(win_entity).insert(CursorIcon::from(if hovering {
+    let icon = pick_cursor_icon(is_dragging, any_button_hovered, any_card_hovered);
-        SystemCursorIcon::Grab
+    commands.entity(win_entity).insert(CursorIcon::from(icon));
-    } else {
-        SystemCursorIcon::Default
-    }));
 }
 
 /// Returns `true` if `cursor` (world-space) is over any face-up draggable card.
@@ -482,6 +535,69 @@ mod tests {
         );
     }
 
+    #[test]
+    fn marker_valid_rgb_tracks_state_success_token() {
+        // `MARKER_VALID` is spelled as a literal because
+        // `Alpha::with_alpha` is not a `const` trait method on stable.
+        // This test pins its RGB to `STATE_SUCCESS` so a future
+        // palette swap that updates the token but forgets the marker
+        // fails loudly here.
+        use crate::ui_theme::STATE_SUCCESS;
+        let valid = MARKER_VALID.to_srgba();
+        let success = STATE_SUCCESS.to_srgba();
+        assert!((valid.red - success.red).abs() < 1e-6);
+        assert!((valid.green - success.green).abs() < 1e-6);
+        assert!((valid.blue - success.blue).abs() < 1e-6);
+        assert!((valid.alpha - 0.55).abs() < 1e-6);
+    }
+
+    // -----------------------------------------------------------------------
+    // pick_cursor_icon priority-order tests
+    // -----------------------------------------------------------------------
+
+    #[test]
+    fn cursor_picks_grabbing_when_dragging_overrides_button_hover() {
+        // Dragging always wins regardless of button or card hover state.
+        assert!(matches!(
+            pick_cursor_icon(true, true, true),
+            SystemCursorIcon::Grabbing
+        ));
+        assert!(matches!(
+            pick_cursor_icon(true, false, false),
+            SystemCursorIcon::Grabbing
+        ));
+    }
+
+    #[test]
+    fn cursor_picks_pointer_when_button_hovered_and_no_drag() {
+        // Button hover beats card hover when not dragging.
+        assert!(matches!(
+            pick_cursor_icon(false, true, false),
+            SystemCursorIcon::Pointer
+        ));
+        assert!(matches!(
+            pick_cursor_icon(false, true, true),
+            SystemCursorIcon::Pointer
+        ));
+    }
+
+    #[test]
+    fn cursor_picks_grab_when_card_hovered_and_no_button() {
+        // Card hover wins only when no drag and no button-hover.
+        assert!(matches!(
+            pick_cursor_icon(false, false, true),
+            SystemCursorIcon::Grab
+        ));
+    }
+
+    #[test]
+    fn cursor_picks_default_when_nothing_hovered() {
+        assert!(matches!(
+            pick_cursor_icon(false, false, false),
+            SystemCursorIcon::Default
+        ));
+    }
+
     #[test]
     fn cursor_over_draggable_returns_false_for_empty_game() {
         use solitaire_core::game_state::{DrawMode, GameState};

solitaire_engine/src/diagnostics_hud.rs

@@ -0,0 +1,164 @@
+//! Optional on-screen FPS / frame-time overlay.
+//!
+//! Wraps Bevy's [`FrameTimeDiagnosticsPlugin`] and renders a tiny
+//! corner readout that the developer (or a curious player) can toggle
+//! with `F3`. Hidden by default — production builds ship the plugin
+//! but the overlay starts invisible, so the production HUD is never
+//! cluttered unless explicitly summoned.
+//!
+//! Why this exists: with an Android port on the roadmap, "feels
+//! slow" became a real risk to plan around. A togglable FPS / frame-
+//! time pair gives us a numeric baseline we can quote across desktop
+//! and mobile, instead of optimising on vibes.
+//!
+//! ## Display contract
+//!
+//! When visible, the overlay reads `"FPS NN \u{2022} M.MM ms"` in a
+//! small monospaced cell, anchored top-right. Both numbers are the
+//! `smoothed()` value (Bevy's exponential moving average) — peak
+//! and worst-case readings would jitter the text every frame, which
+//! is harder to glance at than a smoothed reading.
+//!
+//! ## Hotkey scope
+//!
+//! `F3` is a global, gameplay-blockable toggle: the system reads
+//! `ButtonInput<KeyCode>` directly and ignores the rest of the modal
+//! / pause stack. The overlay is informational and shouldn't depend
+//! on game state.
+
+use bevy::diagnostic::{DiagnosticsStore, FrameTimeDiagnosticsPlugin};
+use bevy::prelude::*;
+
+use crate::font_plugin::FontResource;
+use crate::ui_theme::Z_SPLASH;
+
+/// Z-index for the diagnostics HUD — above every modal / toast /
+/// splash layer so a developer can always see the readout, no matter
+/// what overlay is up.
+const Z_DIAGNOSTICS_HUD: i32 = Z_SPLASH + 100;
+
+/// Width-stable font size for the readout. Hand-tuned literal — the
+/// HUD is a developer affordance and uses its own sizing rather than
+/// borrowing a typography token whose meaning may drift.
+const DIAGNOSTICS_FONT_SIZE: f32 = 12.0;
+
+/// Background alpha for the readout cell. Translucent so the HUD
+/// doesn't fully obscure whatever's behind it but stays legible.
+const DIAGNOSTICS_BG_ALPHA: f32 = 0.7;
+
+/// Wires the FPS / frame-time HUD overlay.
+///
+/// Adds [`FrameTimeDiagnosticsPlugin`] (no-op if already added — the
+/// plugin's `Plugin::build` is idempotent on duplicate registration
+/// in our codebase since no other site adds it). Spawns the HUD
+/// hidden, registers the toggle handler, and wires the per-frame
+/// text refresh.
+pub struct DiagnosticsHudPlugin;
+
+impl Plugin for DiagnosticsHudPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_plugins(FrameTimeDiagnosticsPlugin::default())
+            .init_resource::<DiagnosticsHudVisible>()
+            .add_systems(Startup, spawn_diagnostics_hud)
+            .add_systems(
+                Update,
+                (toggle_diagnostics_hud, update_diagnostics_hud).chain(),
+            );
+    }
+}
+
+/// Tracks whether the overlay is currently visible. Flipped by the
+/// `F3` toggle; defaults to hidden so production launches start clean.
+#[derive(Resource, Debug, Default)]
+struct DiagnosticsHudVisible(bool);
+
+/// Marker on the overlay's root Node — used to flip `Visibility`.
+#[derive(Component, Debug)]
+struct DiagnosticsHudRoot;
+
+/// Marker on the readout `Text` node — used by the per-frame refresh
+/// system to find the right text to overwrite.
+#[derive(Component, Debug)]
+struct DiagnosticsHudText;
+
+/// Spawns the (initially-hidden) overlay at startup. Anchored
+/// top-right with absolute positioning so it never participates in
+/// the rest of the UI flex tree.
+fn spawn_diagnostics_hud(mut commands: Commands, font_res: Option<Res<FontResource>>) {
+    let font_handle = font_res.map(|f| f.0.clone()).unwrap_or_default();
+    let bg = Color::srgba(0.0, 0.0, 0.0, DIAGNOSTICS_BG_ALPHA);
+
+    commands
+        .spawn((
+            DiagnosticsHudRoot,
+            Node {
+                position_type: PositionType::Absolute,
+                top: Val::Px(8.0),
+                right: Val::Px(8.0),
+                padding: UiRect::axes(Val::Px(8.0), Val::Px(4.0)),
+                ..default()
+            },
+            BackgroundColor(bg),
+            Visibility::Hidden,
+            GlobalZIndex(Z_DIAGNOSTICS_HUD),
+        ))
+        .with_children(|parent| {
+            parent.spawn((
+                DiagnosticsHudText,
+                Text::new("FPS \u{2014}"),
+                TextFont {
+                    font: font_handle,
+                    font_size: DIAGNOSTICS_FONT_SIZE,
+                    ..default()
+                },
+                TextColor(Color::WHITE),
+            ));
+        });
+}
+
+/// `F3` flips the visible flag and the overlay's `Visibility`. Reads
+/// the keyboard input directly so it isn't gated by pause / modal
+/// state — diagnostics should always be reachable.
+fn toggle_diagnostics_hud(
+    keys: Res<ButtonInput<KeyCode>>,
+    mut visible: ResMut<DiagnosticsHudVisible>,
+    mut roots: Query<&mut Visibility, With<DiagnosticsHudRoot>>,
+) {
+    if !keys.just_pressed(KeyCode::F3) {
+        return;
+    }
+    visible.0 = !visible.0;
+    let target = if visible.0 {
+        Visibility::Visible
+    } else {
+        Visibility::Hidden
+    };
+    for mut v in &mut roots {
+        *v = target;
+    }
+}
+
+/// Reads the smoothed FPS + frame-time diagnostics each frame and
+/// rewrites the readout text. Skipped while the overlay is hidden so
+/// we don't pay the diagnostic-store lookup or the text mutation
+/// when nobody's looking.
+fn update_diagnostics_hud(
+    diagnostics: Res<DiagnosticsStore>,
+    visible: Res<DiagnosticsHudVisible>,
+    mut texts: Query<&mut Text, With<DiagnosticsHudText>>,
+) {
+    if !visible.0 {
+        return;
+    }
+    let fps = diagnostics
+        .get(&FrameTimeDiagnosticsPlugin::FPS)
+        .and_then(|d| d.smoothed())
+        .unwrap_or(0.0);
+    let frame_time_ms = diagnostics
+        .get(&FrameTimeDiagnosticsPlugin::FRAME_TIME)
+        .and_then(|d| d.smoothed())
+        .unwrap_or(0.0);
+    for mut text in &mut texts {
+        **text = format!("FPS {fps:.0} \u{2022} {frame_time_ms:.2} ms");
+    }
+}

solitaire_engine/src/events.rs

@@ -207,13 +207,6 @@ pub struct ToggleLeaderboardRequestEvent;
 #[derive(Message, Debug, Clone)]
 pub struct SyncCompleteEvent(pub Result<SyncResponse, String>);
 
-/// Fired by `InputPlugin` when N is pressed while a game is in progress
-/// but confirmation has not yet been received. The animation plugin shows
-/// a "Press N again to confirm" toast. A second N press within the
-/// confirmation window sends `NewGameRequestEvent`.
-#[derive(Message, Debug, Clone, Copy, Default)]
-pub struct NewGameConfirmEvent;
-
 /// Generic informational toast message. Any system can fire this to display
 /// a short string to the player, e.g. "Locked — reach level 5".
 #[derive(Message, Debug, Clone)]

solitaire_engine/src/feedback_anim_plugin.rs

@@ -21,8 +21,8 @@
 //!
 //! # Task #69 — Animated card deal on new game start
 //!
-//! When `NewGameRequestEvent` fires (on a fresh game, `move_count == 0`) or
+//! When `NewGameRequestEvent` fires (on a fresh game, `move_count == 0`),
-//! `NewGameConfirmEvent` fires, `start_deal_anim` reads `LayoutResource` and
+//! `start_deal_anim` reads `LayoutResource` and
 //! inserts a `CardAnim` on every card entity, sliding each card from the stock
 //! pile's position to its current (final) position with a per-card stagger
 //! derived from the current `AnimSpeed` setting plus a deterministic ±10 %

solitaire_engine/src/help_plugin.rs

@@ -4,12 +4,14 @@
 //! is an optional accelerator. Listed shortcuts are grouped by intent —
 //! gameplay, modes, and overlays.
 
+use bevy::input::mouse::{MouseScrollUnit, MouseWheel};
 use bevy::prelude::*;
 
 use crate::events::HelpRequestEvent;
 use crate::font_plugin::FontResource;
 use crate::ui_modal::{
     spawn_modal, spawn_modal_actions, spawn_modal_button, spawn_modal_header, ButtonVariant,
+    ScrimDismissible,
 };
 use crate::ui_theme::{
     Z_MODAL_PANEL, BORDER_SUBTLE, RADIUS_SM, SPACE_2, TEXT_PRIMARY, TEXT_SECONDARY, TYPE_BODY,
@@ -24,6 +26,16 @@ pub struct HelpScreen;
 #[derive(Component, Debug)]
 pub struct HelpCloseButton;
 
+/// Marker on the scrollable body Node inside the Help modal.
+///
+/// The controls reference is six sections totalling ~28 rows, which
+/// overflows the modal on the 800x600 minimum window. This marker tags
+/// the inner container that carries `Overflow::scroll_y()` plus a
+/// `max_height` constraint so every row stays reachable. Mirrors the
+/// `SettingsPanelScrollable` pattern.
+#[derive(Component, Debug)]
+pub struct HelpScrollable;
+
 /// Spawns and despawns the help / controls overlay shown when the player
 /// clicks the "Help" HUD button or presses `F1`. All hotkeys and gesture
 /// guides live here.
@@ -32,7 +44,14 @@ pub struct HelpPlugin;
 impl Plugin for HelpPlugin {
     fn build(&self, app: &mut App) {
         app.add_message::<HelpRequestEvent>()
-            .add_systems(Update, (toggle_help_screen, handle_help_close_button));
+            // `MouseWheel` is emitted by Bevy's input plugin under
+            // `DefaultPlugins`; register it explicitly so the help-scroll
+            // system also runs cleanly under `MinimalPlugins` in tests.
+            .add_message::<MouseWheel>()
+            .add_systems(
+                Update,
+                (toggle_help_screen, handle_help_close_button, scroll_help_panel),
+            );
     }
 }
 
@@ -71,6 +90,32 @@ fn handle_help_close_button(
     }
 }
 
+/// Routes mouse-wheel events into the Help modal's scrollable body while
+/// the panel is open. No-op when no `HelpScrollable` exists in the world
+/// (modal closed). Mirrors `scroll_settings_panel`.
+fn scroll_help_panel(
+    mut scroll_evr: MessageReader<MouseWheel>,
+    mut scrollables: Query<&mut ScrollPosition, With<HelpScrollable>>,
+) {
+    if scrollables.is_empty() {
+        scroll_evr.clear();
+        return;
+    }
+    let delta_y: f32 = scroll_evr
+        .read()
+        .map(|ev| match ev.unit {
+            MouseScrollUnit::Line => ev.y * 50.0,
+            MouseScrollUnit::Pixel => ev.y,
+        })
+        .sum();
+    if delta_y == 0.0 {
+        return;
+    }
+    for mut sp in scrollables.iter_mut() {
+        sp.0.y = (sp.0.y - delta_y).max(0.0);
+    }
+}
+
 /// Each entry in the controls reference table.
 struct ControlRow {
     keys: &'static str,
@@ -139,6 +184,8 @@ const CONTROL_SECTIONS: &[ControlSection] = &[
     ControlSection {
         title: "Overlays",
         rows: &[
+            ControlRow { keys: "M", description: "Mode launcher (Home)" },
+            ControlRow { keys: "P", description: "Profile" },
             ControlRow { keys: "S", description: "Stats & progression" },
             ControlRow { keys: "A", description: "Achievements" },
             ControlRow { keys: "L", description: "Leaderboard" },
@@ -147,6 +194,7 @@ const CONTROL_SECTIONS: &[ControlSection] = &[
             ControlRow { keys: "F11", description: "Toggle fullscreen" },
             ControlRow { keys: "Esc", description: "Pause / resume" },
             ControlRow { keys: "[ / ]", description: "SFX volume down / up" },
+            ControlRow { keys: "Enter", description: "Play Again (on the Win Summary)" },
         ],
     },
 ];
@@ -165,12 +213,29 @@ fn spawn_help_screen(commands: &mut Commands, font_res: Option<&FontResource>) {
         ..default()
     };
 
-    spawn_modal(commands, HelpScreen, Z_MODAL_PANEL, |card| {
+    let scrim = spawn_modal(commands, HelpScreen, Z_MODAL_PANEL, |card| {
         spawn_modal_header(card, "Controls", font_res);
 
+        // Scrollable body — the controls reference is six sections totalling
+        // ~28 rows, which overflows the modal on the 800x600 minimum
+        // window. Wrapping in an `Overflow::scroll_y()` Node with a
+        // constrained `max_height` keeps every row reachable; the Done
+        // button below stays fixed outside the scroll.
+        card.spawn((
+            HelpScrollable,
+            ScrollPosition::default(),
+            Node {
+                flex_direction: FlexDirection::Column,
+                row_gap: VAL_SPACE_2,
+                max_height: Val::Vh(70.0),
+                overflow: Overflow::scroll_y(),
+                ..default()
+            },
+        ))
+        .with_children(|body| {
             for section in CONTROL_SECTIONS {
                 // Section title in muted text — distinguishes from row content.
-            card.spawn((
+                body.spawn((
                     Text::new(section.title),
                     font_section.clone(),
                     TextColor(TEXT_SECONDARY),
@@ -178,7 +243,7 @@ fn spawn_help_screen(commands: &mut Commands, font_res: Option<&FontResource>) {
 
                 // Each row is a flex-row: kbd-style chip + description.
                 for row in section.rows {
-                card.spawn(Node {
+                    body.spawn(Node {
                         flex_direction: FlexDirection::Row,
                         align_items: AlignItems::Center,
                         column_gap: VAL_SPACE_3,
@@ -216,11 +281,12 @@ fn spawn_help_screen(commands: &mut Commands, font_res: Option<&FontResource>) {
 
                 // Section spacer — small empty box. Keeps each section
                 // visually grouped.
-            card.spawn(Node {
+                body.spawn(Node {
                     height: Val::Px(SPACE_2),
                     ..default()
                 });
             }
+        });
 
         spawn_modal_actions(card, |actions| {
             spawn_modal_button(
@@ -233,6 +299,9 @@ fn spawn_help_screen(commands: &mut Commands, font_res: Option<&FontResource>) {
             );
         });
     });
+    // Help is read-only — clicking the scrim outside the card dismisses
+    // alongside the existing F1 / Esc / Done paths.
+    commands.entity(scrim).insert(ScrimDismissible);
 }
 
 #[cfg(test)]
@@ -264,6 +333,36 @@ mod tests {
         );
     }
 
+    #[test]
+    fn help_modal_body_is_scrollable() {
+        let mut app = headless_app();
+        app.world_mut()
+            .resource_mut::<ButtonInput<KeyCode>>()
+            .press(KeyCode::F1);
+        app.update();
+
+        let count = app
+            .world_mut()
+            .query::<&HelpScrollable>()
+            .iter(app.world())
+            .count();
+        assert_eq!(
+            count, 1,
+            "Help modal must spawn exactly one HelpScrollable body"
+        );
+
+        let mut q = app
+            .world_mut()
+            .query_filtered::<&Node, With<HelpScrollable>>();
+        let nodes: Vec<&Node> = q.iter(app.world()).collect();
+        assert_ne!(
+            nodes[0].max_height,
+            Val::Auto,
+            "scrollable body must set a non-default max_height"
+        );
+        assert_eq!(nodes[0].overflow, Overflow::scroll_y());
+    }
+
     #[test]
     fn pressing_f1_twice_closes_help_screen() {
         let mut app = headless_app();

solitaire_engine/src/home_plugin.rs

@@ -13,24 +13,34 @@
 //! [`InfoToastEvent`] explaining the gate but does not launch the mode
 //! or close the overlay.
 
+use bevy::input::mouse::{MouseScrollUnit, MouseWheel};
 use bevy::input::ButtonInput;
 use bevy::prelude::*;
+use solitaire_core::game_state::DrawMode;
+use solitaire_data::save_settings_to;
 
 use crate::challenge_plugin::CHALLENGE_UNLOCK_LEVEL;
+use crate::daily_challenge_plugin::DailyChallengeResource;
 use crate::events::{
     InfoToastEvent, NewGameRequestEvent, StartChallengeRequestEvent,
     StartDailyChallengeRequestEvent, StartTimeAttackRequestEvent, StartZenRequestEvent,
+    ToggleProfileRequestEvent,
 };
 use crate::font_plugin::FontResource;
 use crate::progress_plugin::ProgressResource;
+use crate::settings_plugin::{
+    SettingsChangedEvent, SettingsResource, SettingsStoragePath,
+};
+use crate::stats_plugin::StatsResource;
 use crate::ui_focus::{Disabled, FocusGroup, Focusable};
 use crate::ui_modal::{
     spawn_modal, spawn_modal_actions, spawn_modal_button, spawn_modal_header, ButtonVariant,
+    ScrimDismissible,
 };
 use crate::ui_theme::{
-    ACCENT_PRIMARY, BG_ELEVATED_HI, BORDER_STRONG, BORDER_SUBTLE, RADIUS_MD, STATE_INFO,
+    ACCENT_PRIMARY, BG_ELEVATED, BG_ELEVATED_HI, BORDER_STRONG, BORDER_SUBTLE, RADIUS_MD,
-    TEXT_DISABLED, TEXT_PRIMARY, TEXT_SECONDARY, TYPE_BODY, TYPE_BODY_LG, TYPE_CAPTION,
+    STATE_INFO, TEXT_DISABLED, TEXT_PRIMARY, TEXT_SECONDARY, TYPE_BODY, TYPE_BODY_LG,
-    VAL_SPACE_1, VAL_SPACE_2, VAL_SPACE_3, Z_MODAL_PANEL,
+    TYPE_CAPTION, TYPE_DISPLAY, VAL_SPACE_1, VAL_SPACE_2, VAL_SPACE_3, Z_MODAL_PANEL,
 };
 
 // ---------------------------------------------------------------------------
@@ -46,6 +56,31 @@ pub struct HomeScreen;
 #[derive(Component, Debug)]
 pub struct HomeCancelButton;
 
+/// Marker on the player-stats chip strip at the top of the Home modal.
+/// Clicking the strip opens the Profile overlay so the player can drill
+/// into level / XP / cosmetics without first dismissing Home.
+#[derive(Component, Debug)]
+struct HomeProfileChip;
+
+/// Marker on the "Draw 1" toggle button inside the Home modal's
+/// draw-mode row. Clicking flips `Settings.draw_mode` to `DrawOne` and
+/// fires `SettingsChangedEvent` so audio / UI dependents react.
+#[derive(Component, Debug)]
+struct HomeDrawOneButton;
+
+/// Marker on the "Draw 3" toggle button inside the Home modal's
+/// draw-mode row. Mirror of [`HomeDrawOneButton`] for `DrawThree`.
+#[derive(Component, Debug)]
+struct HomeDrawThreeButton;
+
+/// Marker on the scrollable inner Node containing the player chips,
+/// draw-mode row, and tile grid. Wrapping these in a scrollable
+/// container keeps the modal usable on small viewports — without it,
+/// the 3-row tile stack pushes the Cancel button off the bottom of
+/// the screen on 800x600 hardware. Mirrors `SettingsPanelScrollable`.
+#[derive(Component, Debug)]
+struct HomeScrollable;
+
 // ---------------------------------------------------------------------------
 // Private mode-card data shape
 // ---------------------------------------------------------------------------
@@ -86,6 +121,38 @@ impl HomeMode {
         }
     }
 
+    /// Unicode glyph rendered as the picture-tile centrepiece. Stand-in
+    /// for real per-mode artwork — chosen for one-glyph-tells-the-mode
+    /// readability rather than visual fidelity. Swap to `Image` nodes
+    /// when art lands; the rest of the tile layout doesn't change.
+    ///
+    /// Picks are constrained to **card suits** (U+2660-2666) and basic
+    /// **Geometric Shapes** (U+25xx) — the two ranges the bundled
+    /// FiraMono-Medium face actually covers. Earlier choices in
+    /// Dingbats (★ ❀ ✦) and Misc Symbols (⌚) rendered as
+    /// missing-glyph rectangles because FiraMono's coverage there is
+    /// minimal.
+    fn glyph(self) -> &'static str {
+        match self {
+            // Black club — card suit, the obvious solitaire mark.
+            HomeMode::Classic => "\u{2663}",
+            // Black diamond — Geometric Shapes; reads as the day's gem.
+            HomeMode::Daily => "\u{25C6}",
+            // White circle — Geometric Shapes; reads as the Zen enso.
+            HomeMode::Zen => "\u{25CB}",
+            // Black up-pointing triangle — Geometric Shapes; reads as
+            // a mountain / a step up in difficulty.
+            HomeMode::Challenge => "\u{25B2}",
+            // Rightwards arrow — Arrows block (U+2190-21FF), a core
+            // range every dev-oriented monospace font (FiraMono
+            // included) ships. Reads as "go / fast-forward" for the
+            // timed mode. Earlier ▶ (U+25B6) did not render; FiraMono
+            // ships ▲ (up triangle) but evidently not the sideways
+            // siblings.
+            HomeMode::TimeAttack => "\u{2192}",
+        }
+    }
+
     /// The keyboard accelerator that dispatches the same launch event,
     /// shown in a small chip on the card.
     fn hotkey(self) -> &'static str {
@@ -114,27 +181,69 @@ impl HomeMode {
 #[derive(Component, Debug)]
 struct HomeModeCard(HomeMode);
 
+/// Tracks whether the launch-time Home modal has already been auto-shown
+/// for this app session. Flipped to `true` by [`spawn_home_on_launch`]
+/// the first time it spawns the modal, so the auto-show is one-shot per
+/// process — subsequent dismissals (Cancel / mode pick) don't trigger
+/// a respawn, but the player can still re-open the picker with `M`.
+///
+/// Other plugins (e.g. `game_plugin`'s restore-prompt handler) can flip
+/// the flag manually to suppress the launch auto-show when the player
+/// has already made a launch-time choice through a different surface.
+#[derive(Resource, Debug, Default)]
+pub struct LaunchHomeShown(pub bool);
+
 // ---------------------------------------------------------------------------
 // Plugin
 // ---------------------------------------------------------------------------
 
 /// Registers the M-key toggle, the mode-card click handler, and the
 /// Cancel-button handler.
-pub struct HomePlugin;
+///
+/// `auto_show_on_launch` (default true) controls whether the picker
+/// auto-spawns once the splash clears at app start. Headless tests use
+/// [`HomePlugin::headless`] to opt out so each test starts with no
+/// modal in the world.
+pub struct HomePlugin {
+    auto_show_on_launch: bool,
+}
+
+impl Default for HomePlugin {
+    fn default() -> Self {
+        Self {
+            auto_show_on_launch: true,
+        }
+    }
+}
+
+impl HomePlugin {
+    /// Test-only constructor that disables the launch-time auto-show.
+    /// `MinimalPlugins` test setups don't include a splash, so the
+    /// gating system would otherwise fire on the first tick and
+    /// pre-spawn the modal that every test asserts is absent.
+    pub fn headless() -> Self {
+        Self {
+            auto_show_on_launch: false,
+        }
+    }
+}
 
 impl Plugin for HomePlugin {
     fn build(&self, app: &mut App) {
-        // Be defensive about message registration so HomePlugin works
+        // Pre-mark the auto-show as already done in headless mode so the
-        // standalone in tests (the actual handlers live in
+        // gating system is a permanent no-op for tests.
-        // input_plugin / challenge_plugin / time_attack_plugin /
+        app.insert_resource(LaunchHomeShown(!self.auto_show_on_launch))
-        // daily_challenge_plugin, but those plugins might not be
+            .add_message::<NewGameRequestEvent>()
-        // installed in a tightly-scoped headless app).
-        app.add_message::<NewGameRequestEvent>()
             .add_message::<StartZenRequestEvent>()
             .add_message::<StartChallengeRequestEvent>()
             .add_message::<StartTimeAttackRequestEvent>()
             .add_message::<StartDailyChallengeRequestEvent>()
             .add_message::<InfoToastEvent>()
+            .add_message::<ToggleProfileRequestEvent>()
+            .add_message::<SettingsChangedEvent>()
+            // Defensively register MouseWheel so `scroll_home_panel`
+            // runs cleanly under MinimalPlugins headless tests too.
+            .add_message::<MouseWheel>()
             // `.chain()` because several systems (M-toggle, card click,
             // cancel button, digit-key shortcut) all read the
             // `HomeScreen` entity and may queue a despawn on it in the
@@ -146,25 +255,92 @@ impl Plugin for HomePlugin {
             .add_systems(
                 Update,
                 (
+                    spawn_home_on_launch,
                     toggle_home_screen,
                     attach_focusable_to_home_mode_cards,
                     handle_home_card_click,
                     handle_home_cancel_button,
+                    handle_home_profile_chip,
+                    handle_home_draw_mode_buttons,
                     handle_home_digit_keys,
                 )
                     .chain(),
-            );
+            )
+            .add_systems(Update, scroll_home_panel);
     }
 }
 
+// ---------------------------------------------------------------------------
+// Auto-show on launch
+// ---------------------------------------------------------------------------
+
+/// Auto-spawns the Home / mode-picker modal once per app session, so
+/// the player lands on a deliberate "what mode do I want to play"
+/// screen instead of the default Classic deal.
+///
+/// Gated on the launch-time UI being clear:
+///
+/// * `SplashRoot` must be gone — the splash owns the foreground during
+///   the brand beat and the home modal appearing under it would feel
+///   like a flash of half-rendered UI.
+/// * `RestorePromptScreen` must not be open and `PendingRestoredGame`
+///   must be empty — when the player has a saved in-progress game the
+///   restore prompt takes precedence; the home picker would compete
+///   with it for attention.
+/// * `HomeScreen` must not already exist (defensive — e.g. the player
+///   pressed `M` between ticks).
+/// * `LaunchHomeShown` flips to `true` after the first spawn so this
+///   system becomes a no-op for the rest of the session. Cancelling
+///   the modal therefore goes to the underlying default deal rather
+///   than respawning the picker.
+#[allow(clippy::too_many_arguments)]
+fn spawn_home_on_launch(
+    mut commands: Commands,
+    mut shown: ResMut<LaunchHomeShown>,
+    splash: Query<(), With<crate::splash_plugin::SplashRoot>>,
+    restore_prompts: Query<(), With<crate::game_plugin::RestorePromptScreen>>,
+    pending_restore: Option<Res<crate::game_plugin::PendingRestoredGame>>,
+    existing: Query<(), With<HomeScreen>>,
+    progress: Option<Res<ProgressResource>>,
+    stats: Option<Res<StatsResource>>,
+    settings: Option<Res<SettingsResource>>,
+    daily: Option<Res<DailyChallengeResource>>,
+    font_res: Option<Res<FontResource>>,
+) {
+    if shown.0
+        || !splash.is_empty()
+        || !restore_prompts.is_empty()
+        || pending_restore.as_ref().is_some_and(|p| p.0.is_some())
+        || !existing.is_empty()
+    {
+        return;
+    }
+
+    spawn_home_screen(
+        &mut commands,
+        build_home_context(
+            progress.as_deref(),
+            stats.as_deref(),
+            settings.as_deref(),
+            daily.as_deref(),
+            font_res.as_deref(),
+        ),
+    );
+    shown.0 = true;
+}
+
 // ---------------------------------------------------------------------------
 // M-key toggle
 // ---------------------------------------------------------------------------
 
+#[allow(clippy::too_many_arguments)]
 fn toggle_home_screen(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
     progress: Option<Res<ProgressResource>>,
+    stats: Option<Res<StatsResource>>,
+    settings: Option<Res<SettingsResource>>,
+    daily: Option<Res<DailyChallengeResource>>,
     font_res: Option<Res<FontResource>>,
     screens: Query<Entity, With<HomeScreen>>,
 ) {
@@ -174,8 +350,54 @@ fn toggle_home_screen(
     if let Ok(entity) = screens.single() {
         commands.entity(entity).despawn();
     } else {
-        let level = progress.as_ref().map_or(0, |p| p.0.level);
+        spawn_home_screen(
-        spawn_home_screen(&mut commands, level, font_res.as_deref());
+            &mut commands,
+            build_home_context(
+                progress.as_deref(),
+                stats.as_deref(),
+                settings.as_deref(),
+                daily.as_deref(),
+                font_res.as_deref(),
+            ),
+        );
+    }
+}
+
+/// Builds a [`HomeContext`] from the live resources the Home modal
+/// reads. Falls back to safe defaults when a resource is missing
+/// (typical for `MinimalPlugins` headless tests that don't install
+/// every contributor plugin).
+fn build_home_context<'a>(
+    progress: Option<&ProgressResource>,
+    stats: Option<&StatsResource>,
+    settings: Option<&SettingsResource>,
+    daily: Option<&DailyChallengeResource>,
+    font_res: Option<&'a FontResource>,
+) -> HomeContext<'a> {
+    let daily_today = daily.map(|d| {
+        let completed_today = progress
+            .and_then(|p| p.0.daily_challenge_last_completed)
+            .is_some_and(|d_last| d_last == d.date);
+        DailyToday {
+            date_label: d.date.format("%b %-d").to_string(),
+            goal: d.goal_description.clone(),
+            completed_today,
+        }
+    });
+
+    HomeContext {
+        level: progress.map_or(0, |p| p.0.level),
+        total_xp: progress.map_or(0, |p| p.0.total_xp),
+        daily_streak: progress.map_or(0, |p| p.0.daily_challenge_streak),
+        lifetime_score: stats.map_or(0, |s| s.0.lifetime_score),
+        classic_best: stats.map_or(0, |s| s.0.classic_best_score),
+        zen_best: stats.map_or(0, |s| s.0.zen_best_score),
+        challenge_best: stats.map_or(0, |s| s.0.challenge_best_score),
+        daily_today,
+        draw_mode: settings
+            .map(|s| s.0.draw_mode.clone())
+            .unwrap_or(DrawMode::DrawOne),
+        font_res,
     }
 }
 
@@ -250,10 +472,22 @@ fn handle_home_card_click(
 
 fn handle_home_cancel_button(
     mut commands: Commands,
+    keys: Option<Res<ButtonInput<KeyCode>>>,
     cancel_buttons: Query<&Interaction, (With<HomeCancelButton>, Changed<Interaction>)>,
     screens: Query<Entity, With<HomeScreen>>,
+    other_modal_scrims: Query<(), (With<crate::ui_modal::ModalScrim>, Without<HomeScreen>)>,
 ) {
-    if !cancel_buttons.iter().any(|i| *i == Interaction::Pressed) {
+    if screens.is_empty() {
+        return;
+    }
+    let click = cancel_buttons.iter().any(|i| *i == Interaction::Pressed);
+    let esc = keys.is_some_and(|k| k.just_pressed(KeyCode::Escape));
+    // Esc only closes Home when it is the *topmost* modal. With Profile
+    // (or any other ModalScrim) layered on top, the topmost owns the
+    // dismissal — without this gate a single Esc closed the back
+    // modal (Home) and left the front modal orphaned.
+    let esc_targets_home = esc && other_modal_scrims.is_empty();
+    if !click && !esc_targets_home {
         return;
     }
     for entity in &screens {
@@ -261,6 +495,115 @@ fn handle_home_cancel_button(
     }
 }
 
+// ---------------------------------------------------------------------------
+// Header chip + draw-mode button handlers
+// ---------------------------------------------------------------------------
+
+/// Routes mouse-wheel events into the Home modal's scrollable body
+/// while the modal is open. No-op when no `HomeScrollable` exists in
+/// the world (modal closed). Mirrors `scroll_settings_panel` and
+/// `scroll_leaderboard_panel`.
+fn scroll_home_panel(
+    mut scroll_evr: MessageReader<MouseWheel>,
+    mut scrollables: Query<&mut ScrollPosition, With<HomeScrollable>>,
+) {
+    if scrollables.is_empty() {
+        scroll_evr.clear();
+        return;
+    }
+    let delta_y: f32 = scroll_evr
+        .read()
+        .map(|ev| match ev.unit {
+            MouseScrollUnit::Line => ev.y * 50.0,
+            MouseScrollUnit::Pixel => ev.y,
+        })
+        .sum();
+    if delta_y == 0.0 {
+        return;
+    }
+    for mut sp in scrollables.iter_mut() {
+        sp.0.y = (sp.0.y - delta_y).max(0.0);
+    }
+}
+
+/// Click on the player-stats header chip → fire
+/// [`ToggleProfileRequestEvent`] so the Profile overlay opens on top
+/// of Home. Closing Profile (`P` / `Esc`) returns the player to the
+/// Home picker without losing their context.
+fn handle_home_profile_chip(
+    chips: Query<&Interaction, (With<HomeProfileChip>, Changed<Interaction>)>,
+    mut profile: MessageWriter<ToggleProfileRequestEvent>,
+) {
+    if chips.iter().any(|i| *i == Interaction::Pressed) {
+        profile.write(ToggleProfileRequestEvent);
+    }
+}
+
+/// Click on a draw-mode chip — flip `Settings.draw_mode`, persist,
+/// fire `SettingsChangedEvent`, and respawn the Home modal so the
+/// active-chip styling reflects the new state. Repaint by full
+/// rebuild keeps the helper code small (no per-entity colour
+/// surgery) and the modal is light enough to respawn cleanly.
+#[allow(clippy::too_many_arguments)]
+fn handle_home_draw_mode_buttons(
+    mut commands: Commands,
+    one_buttons: Query<&Interaction, (With<HomeDrawOneButton>, Changed<Interaction>)>,
+    three_buttons: Query<&Interaction, (With<HomeDrawThreeButton>, Changed<Interaction>)>,
+    screens: Query<Entity, With<HomeScreen>>,
+    mut settings: Option<ResMut<SettingsResource>>,
+    storage_path: Option<Res<SettingsStoragePath>>,
+    mut changed: MessageWriter<SettingsChangedEvent>,
+    progress: Option<Res<ProgressResource>>,
+    stats: Option<Res<StatsResource>>,
+    daily: Option<Res<DailyChallengeResource>>,
+    font_res: Option<Res<FontResource>>,
+) {
+    if screens.is_empty() {
+        return;
+    }
+    let want_one = one_buttons.iter().any(|i| *i == Interaction::Pressed);
+    let want_three = three_buttons.iter().any(|i| *i == Interaction::Pressed);
+    if !want_one && !want_three {
+        return;
+    }
+    let Some(settings) = settings.as_mut() else {
+        return;
+    };
+    let target = if want_one {
+        DrawMode::DrawOne
+    } else {
+        DrawMode::DrawThree
+    };
+    if settings.0.draw_mode == target {
+        return; // already in this mode — avoid a redundant respawn.
+    }
+    settings.0.draw_mode = target;
+    if let Some(p) = storage_path
+        && let Some(path) = p.0.as_deref()
+        && let Err(e) = save_settings_to(path, &settings.0)
+    {
+        warn!("home: failed to persist draw-mode change: {e}");
+    }
+    changed.write(SettingsChangedEvent(settings.0.clone()));
+
+    // Repaint by despawn + respawn so the chip styling and any
+    // dependent labels (none today, but Phase B may surface a
+    // "Standard (Draw 1)" caption like MSSC) reflect the new state.
+    for entity in &screens {
+        commands.entity(entity).despawn();
+    }
+    spawn_home_screen(
+        &mut commands,
+        build_home_context(
+            progress.as_deref(),
+            stats.as_deref(),
+            Some(settings),
+            daily.as_deref(),
+            font_res.as_deref(),
+        ),
+    );
+}
+
 // ---------------------------------------------------------------------------
 // Digit-key shortcuts (1-5) — modal-scoped
 // ---------------------------------------------------------------------------
@@ -357,11 +700,84 @@ fn handle_home_digit_keys(
 // Spawn helpers
 // ---------------------------------------------------------------------------
 
-/// Spawns the Home modal with five mode cards plus a Cancel button.
+/// Bundles the data the Home modal needs to render the new
-fn spawn_home_screen(commands: &mut Commands, level: u32, font_res: Option<&FontResource>) {
+/// MSSC-inspired header chips, per-mode score chips, and draw-mode
-    spawn_modal(commands, HomeScreen, Z_MODAL_PANEL, |card| {
+/// row. Built fresh by the two call sites (`spawn_home_on_launch`
+/// and `toggle_home_screen`) from the live progress / stats /
+/// settings resources, with sensible defaults when a resource is
+/// missing under `MinimalPlugins` headless tests.
+struct HomeContext<'a> {
+    level: u32,
+    total_xp: u64,
+    lifetime_score: u64,
+    classic_best: u32,
+    zen_best: u32,
+    challenge_best: u32,
+    daily_streak: u32,
+    daily_today: Option<DailyToday>,
+    draw_mode: DrawMode,
+    font_res: Option<&'a FontResource>,
+}
+
+/// Today's daily-challenge metadata as the Home picker needs it. Only
+/// populated when both [`DailyChallengeResource`] is present (the
+/// plugin is wired) and we have something useful to show — otherwise
+/// the Daily card falls back to its baseline description without a
+/// dated callout.
+struct DailyToday {
+    /// Short calendar label, e.g. `"May 6"`. Always populated.
+    date_label: String,
+    /// Server-supplied goal copy ("Win in under 5 minutes"). `None`
+    /// when no server backend is wired or the fetch hasn't returned.
+    goal: Option<String>,
+    /// `true` when the player has already recorded today's daily.
+    /// Surfaces a "Done" badge so the picker reads as reward-state
+    /// rather than "you still owe today's run".
+    completed_today: bool,
+}
+
+/// Spawns the Home modal with the player-stats header strip, draw-mode
+/// row, five mode cards, and a Cancel button.
+fn spawn_home_screen(commands: &mut Commands, ctx: HomeContext<'_>) {
+    let HomeContext { font_res, .. } = ctx;
+    let scrim = spawn_modal(commands, HomeScreen, Z_MODAL_PANEL, |card| {
         spawn_modal_header(card, "Choose a Mode", font_res);
 
+        // Scrollable middle — chips + draw row + tile grid. Constrained
+        // to 70vh so the modal fits on small viewports (the 5-tile
+        // grid alone is ~540 px). Cancel button sits outside this
+        // node so it's always one click away.
+        card.spawn((
+            HomeScrollable,
+            ScrollPosition::default(),
+            Node {
+                flex_direction: FlexDirection::Column,
+                row_gap: VAL_SPACE_3,
+                width: Val::Percent(100.0),
+                max_height: Val::Vh(70.0),
+                overflow: Overflow::scroll_y(),
+                ..default()
+            },
+        ))
+        .with_children(|body| {
+            spawn_home_header_chips(body, &ctx);
+            spawn_draw_mode_row(body, &ctx);
+
+            // Mode tiles in a wrapping 2-column grid. Each tile takes 48%
+            // of the row so column_gap fits comfortably; the 5 modes wrap
+            // to a third row of one tile, which we leave left-aligned —
+            // the asymmetry matches MSSC's "Daily Challenges / Today's
+            // Event" half-cell on the right of their grid and keeps the
+            // visual rhythm.
+            body.spawn(Node {
+                flex_direction: FlexDirection::Row,
+                flex_wrap: FlexWrap::Wrap,
+                row_gap: VAL_SPACE_3,
+                column_gap: VAL_SPACE_3,
+                width: Val::Percent(100.0),
+                ..default()
+            })
+            .with_children(|grid| {
                 for mode in [
                     HomeMode::Classic,
                     HomeMode::Daily,
@@ -369,8 +785,10 @@ fn spawn_home_screen(commands: &mut Commands, level: u32, font_res: Option<&Font
                     HomeMode::Challenge,
                     HomeMode::TimeAttack,
                 ] {
-            spawn_mode_card(card, mode, level, font_res);
+                    spawn_mode_card(grid, mode, &ctx);
                 }
+            });
+        });
 
         spawn_modal_actions(card, |actions| {
             spawn_modal_button(
@@ -383,6 +801,190 @@ fn spawn_home_screen(commands: &mut Commands, level: u32, font_res: Option<&Font
             );
         });
     });
+    // Home is read-only — opt into click-outside-to-dismiss.
+    commands.entity(scrim).insert(ScrimDismissible);
+}
+
+/// Player-stats chip strip — Level, XP, Lifetime Score. Clickable as a
+/// whole to open the Profile overlay (mirrors the MSSC top-right
+/// avatar+rewards corner that surfaces level + premium status). Falls
+/// back to plain Text in headless contexts where `Button` interaction
+/// isn't driven by the input pipeline anyway.
+fn spawn_home_header_chips(parent: &mut ChildSpawnerCommands, ctx: &HomeContext<'_>) {
+    let font_handle = ctx.font_res.map(|f| f.0.clone()).unwrap_or_default();
+    let font_label = TextFont {
+        font: font_handle.clone(),
+        font_size: TYPE_CAPTION,
+        ..default()
+    };
+    let font_value = TextFont {
+        font: font_handle,
+        font_size: TYPE_BODY,
+        ..default()
+    };
+
+    parent
+        .spawn((
+            HomeProfileChip,
+            Button,
+            Node {
+                flex_direction: FlexDirection::Row,
+                align_items: AlignItems::Center,
+                justify_content: JustifyContent::SpaceBetween,
+                column_gap: VAL_SPACE_2,
+                padding: UiRect::axes(VAL_SPACE_3, VAL_SPACE_2),
+                border: UiRect::all(Val::Px(1.0)),
+                border_radius: BorderRadius::all(Val::Px(RADIUS_MD)),
+                width: Val::Percent(100.0),
+                ..default()
+            },
+            BackgroundColor(BG_ELEVATED),
+            BorderColor::all(BORDER_SUBTLE),
+        ))
+        .with_children(|row| {
+            for (label, value) in [
+                ("Level".to_string(), format_compact(ctx.level as u64)),
+                ("XP".to_string(), format_compact(ctx.total_xp)),
+                ("Score".to_string(), format_compact(ctx.lifetime_score)),
+            ] {
+                row.spawn(Node {
+                    flex_direction: FlexDirection::Column,
+                    align_items: AlignItems::Center,
+                    row_gap: VAL_SPACE_1,
+                    ..default()
+                })
+                .with_children(|col| {
+                    col.spawn((
+                        Text::new(label),
+                        font_label.clone(),
+                        TextColor(TEXT_SECONDARY),
+                    ));
+                    col.spawn((
+                        Text::new(value),
+                        font_value.clone(),
+                        TextColor(ACCENT_PRIMARY),
+                    ));
+                });
+            }
+        });
+}
+
+/// Draw-mode row — "Draw 1" / "Draw 3" toggle. Affects the next Classic
+/// deal (the Settings value the new-game flow reads). Surfacing it on
+/// the Home modal keeps the per-game choice one tap away rather than
+/// buried in Settings, mirroring the dropdown MSSC puts on its
+/// difficulty picker.
+fn spawn_draw_mode_row(parent: &mut ChildSpawnerCommands, ctx: &HomeContext<'_>) {
+    let font_handle = ctx.font_res.map(|f| f.0.clone()).unwrap_or_default();
+    let font_label = TextFont {
+        font: font_handle.clone(),
+        font_size: TYPE_CAPTION,
+        ..default()
+    };
+    let font_btn = TextFont {
+        font: font_handle,
+        font_size: TYPE_BODY,
+        ..default()
+    };
+
+    let active_one = matches!(ctx.draw_mode, DrawMode::DrawOne);
+
+    parent
+        .spawn(Node {
+            flex_direction: FlexDirection::Row,
+            align_items: AlignItems::Center,
+            column_gap: VAL_SPACE_3,
+            ..default()
+        })
+        .with_children(|row| {
+            row.spawn((
+                Text::new("Draw mode"),
+                font_label.clone(),
+                TextColor(TEXT_SECONDARY),
+            ));
+            spawn_draw_mode_chip::<HomeDrawOneButton>(
+                row,
+                HomeDrawOneButton,
+                "Draw 1",
+                active_one,
+                &font_btn,
+            );
+            spawn_draw_mode_chip::<HomeDrawThreeButton>(
+                row,
+                HomeDrawThreeButton,
+                "Draw 3",
+                !active_one,
+                &font_btn,
+            );
+        });
+}
+
+fn spawn_draw_mode_chip<M: Component>(
+    parent: &mut ChildSpawnerCommands,
+    marker: M,
+    label: &str,
+    active: bool,
+    font: &TextFont,
+) {
+    let (bg, fg) = if active {
+        (ACCENT_PRIMARY, BG_ELEVATED)
+    } else {
+        (BG_ELEVATED_HI, TEXT_PRIMARY)
+    };
+    parent
+        .spawn((
+            marker,
+            Button,
+            Node {
+                padding: UiRect::axes(VAL_SPACE_3, VAL_SPACE_1),
+                border: UiRect::all(Val::Px(1.0)),
+                border_radius: BorderRadius::all(Val::Px(RADIUS_MD)),
+                ..default()
+            },
+            BackgroundColor(bg),
+            BorderColor::all(BORDER_SUBTLE),
+        ))
+        .with_children(|c| {
+            c.spawn((Text::new(label.to_string()), font.clone(), TextColor(fg)));
+        });
+}
+
+/// Compact decimal formatter: `1234567` → `"1.2M"`, `12345` → `"12.3K"`,
+/// otherwise the raw number with thousands separators. Keeps chip text
+/// short enough to fit a 3-up header strip without wrapping.
+fn format_compact(n: u64) -> String {
+    if n >= 1_000_000 {
+        format!("{:.1}M", n as f64 / 1_000_000.0)
+    } else if n >= 10_000 {
+        format!("{:.1}K", n as f64 / 1_000.0)
+    } else if n >= 1_000 {
+        let (high, low) = (n / 1_000, n % 1_000);
+        format!("{high},{low:03}")
+    } else {
+        n.to_string()
+    }
+}
+
+/// Per-mode score / streak chip text. `None` for modes where no
+/// per-mode best exists yet (Time Attack uses session scoring; modes
+/// with `0` recorded mean "no win yet" and we hide the chip rather
+/// than show a 0).
+fn score_chip_text_for(mode: HomeMode, ctx: &HomeContext<'_>) -> Option<String> {
+    match mode {
+        HomeMode::Classic if ctx.classic_best > 0 => {
+            Some(format!("Best {}", format_compact(ctx.classic_best as u64)))
+        }
+        HomeMode::Zen if ctx.zen_best > 0 => {
+            Some(format!("Best {}", format_compact(ctx.zen_best as u64)))
+        }
+        HomeMode::Challenge if ctx.challenge_best > 0 => {
+            Some(format!("Best {}", format_compact(ctx.challenge_best as u64)))
+        }
+        HomeMode::Daily if ctx.daily_streak > 0 => {
+            Some(format!("Streak {}", ctx.daily_streak))
+        }
+        _ => None,
+    }
 }
 
 /// Tab-walk order for each mode card, matching the visual top-to-bottom
@@ -456,9 +1058,11 @@ fn attach_focusable_to_home_mode_cards(
 fn spawn_mode_card(
     parent: &mut ChildSpawnerCommands,
     mode: HomeMode,
-    level: u32,
+    ctx: &HomeContext<'_>,
-    font_res: Option<&FontResource>,
 ) {
+    let level = ctx.level;
+    let font_res = ctx.font_res;
+    let score_chip = score_chip_text_for(mode, ctx);
     let unlocked = mode.is_unlocked(level);
     let font_handle = font_res.map(|f| f.0.clone()).unwrap_or_default();
     let font_title = TextFont {
@@ -472,10 +1076,17 @@ fn spawn_mode_card(
         ..default()
     };
     let font_chip = TextFont {
-        font: font_handle,
+        font: font_handle.clone(),
         font_size: TYPE_CAPTION,
         ..default()
     };
+    // Glyph rendered at display size — Unicode emoji standing in for
+    // the per-mode artwork. Centred at the top of the tile.
+    let font_glyph = TextFont {
+        font: font_handle,
+        font_size: TYPE_DISPLAY,
+        ..default()
+    };
 
     // Locked cards mute their text to communicate the disabled state at
     // a glance; the explicit "Unlocks at level N" caption underneath
@@ -483,6 +1094,7 @@ fn spawn_mode_card(
     let title_color = if unlocked { TEXT_PRIMARY } else { TEXT_DISABLED };
     let desc_color = if unlocked { TEXT_SECONDARY } else { TEXT_DISABLED };
     let border_color = if unlocked { BORDER_SUBTLE } else { BORDER_STRONG };
+    let glyph_color = if unlocked { ACCENT_PRIMARY } else { TEXT_DISABLED };
 
     parent
         .spawn((
@@ -493,9 +1105,13 @@ fn spawn_mode_card(
             Button,
             Node {
                 flex_direction: FlexDirection::Column,
-                row_gap: VAL_SPACE_1,
+                row_gap: VAL_SPACE_2,
                 padding: UiRect::all(VAL_SPACE_3),
-                width: Val::Percent(100.0),
+                // 48% per tile + the row's column_gap = a clean 2-up
+                // grid that wraps to a single tile on the third row.
+                width: Val::Percent(48.0),
+                min_height: Val::Px(180.0),
+                align_items: AlignItems::Center,
                 border: UiRect::all(Val::Px(1.0)),
                 border_radius: BorderRadius::all(Val::Px(RADIUS_MD)),
                 ..default()
@@ -504,12 +1120,20 @@ fn spawn_mode_card(
             BorderColor::all(border_color),
         ))
         .with_children(|c| {
+            // Centerpiece glyph — placeholder for real per-mode art.
+            c.spawn((
+                Text::new(mode.glyph().to_string()),
+                font_glyph.clone(),
+                TextColor(glyph_color),
+            ));
+
             // Title row — title text on the left, hotkey chip on the right.
             c.spawn(Node {
                 flex_direction: FlexDirection::Row,
                 align_items: AlignItems::Center,
                 justify_content: JustifyContent::SpaceBetween,
                 column_gap: VAL_SPACE_3,
+                width: Val::Percent(100.0),
                 ..default()
             })
             .with_children(|row| {
@@ -559,6 +1183,59 @@ fn spawn_mode_card(
                 TextColor(desc_color),
             ));
 
+            // Per-mode score / streak chip — populated only when the
+            // player has data for this mode. Hidden on a 0 best so a
+            // fresh profile doesn't show "Best 0" everywhere.
+            if let Some(text) = score_chip.clone()
+                && unlocked
+            {
+                c.spawn((
+                    Text::new(text),
+                    font_chip.clone(),
+                    TextColor(ACCENT_PRIMARY),
+                    Node {
+                        margin: UiRect::top(VAL_SPACE_1),
+                        ..default()
+                    },
+                ));
+            }
+
+            // Daily-only "Today's Event" caption — date, optional
+            // server goal, and a "Done" badge once the player has
+            // already recorded today's completion. Only renders for
+            // the Daily card when DailyChallengeResource is present.
+            if matches!(mode, HomeMode::Daily)
+                && unlocked
+                && let Some(today) = ctx.daily_today.as_ref()
+            {
+                let date_text = if today.completed_today {
+                    format!("Today, {} \u{2022} Done", today.date_label)
+                } else {
+                    format!("Today, {}", today.date_label)
+                };
+                let date_color = if today.completed_today {
+                    ACCENT_PRIMARY
+                } else {
+                    STATE_INFO
+                };
+                c.spawn((
+                    Text::new(date_text),
+                    font_chip.clone(),
+                    TextColor(date_color),
+                    Node {
+                        margin: UiRect::top(VAL_SPACE_1),
+                        ..default()
+                    },
+                ));
+                if let Some(goal) = today.goal.as_ref() {
+                    c.spawn((
+                        Text::new(format!("Goal: {goal}")),
+                        font_chip.clone(),
+                        TextColor(TEXT_SECONDARY),
+                    ));
+                }
+            }
+
             // Locked footnote — explicit copy so the gate is unambiguous.
             if !unlocked {
                 c.spawn((
@@ -599,7 +1276,7 @@ mod tests {
             .add_plugins(GamePlugin)
             .add_plugins(TablePlugin)
             .add_plugins(ProgressPlugin::headless())
-            .add_plugins(HomePlugin);
+            .add_plugins(HomePlugin::headless());
         app.init_resource::<ButtonInput<KeyCode>>();
         app.update();
         app
@@ -889,7 +1566,7 @@ mod tests {
             .add_plugins(GamePlugin)
             .add_plugins(TablePlugin)
             .add_plugins(ProgressPlugin::headless())
-            .add_plugins(HomePlugin);
+            .add_plugins(HomePlugin::headless());
         app.init_resource::<ButtonInput<KeyCode>>();
         app.update();
         app

solitaire_engine/src/hud_plugin.rs

@@ -62,6 +62,18 @@ pub struct HudMode;
 #[derive(Component, Debug)]
 pub struct HudChallenge;
 
+/// Marker on the "won this deal before" indicator text node.
+///
+/// Displays `"✓ Won before"` when the current deal's seed + draw_mode +
+/// mode triple matches one of the entries in `ReplayHistoryResource`.
+/// Empty string otherwise (including won games — the score readout
+/// already conveys the win on the active deal). Only meaningful for
+/// Classic / Zen / Challenge — daily-challenge and time-attack seeds
+/// are filtered out implicitly because their replay entries always
+/// carry a different mode tag.
+#[derive(Component, Debug)]
+pub struct HudWonPreviously;
+
 /// Marker on the undo-count text node.
 ///
 /// Shows how many undos have been used this game. Displayed in amber when
@@ -194,6 +206,16 @@ pub const SCORE_FLOATER_THRESHOLD: i32 = 50;
 #[derive(Component, Debug)]
 pub struct ActionButton;
 
+/// Marker on rows inside a popover panel ([`ModesPopover`] or
+/// [`MenuPopover`]). Popover rows already carry `ActionButton` so the
+/// hover/press paint path applies to them, but the auto-fade applied
+/// to the top-level action bar must NOT also fade these rows — the
+/// popover only renders when the player has explicitly opened it, so
+/// its content should always be at full opacity. `apply_action_fade`
+/// excludes entities with this marker via `Without<PopoverRow>`.
+#[derive(Component, Debug)]
+pub struct PopoverRow;
+
 /// Marker on the "New Game" action button anchored top-right of the play
 /// area. Click fires [`NewGameRequestEvent`]; the existing
 /// `ConfirmNewGameScreen` modal handles confirmation when a game is in
@@ -302,6 +324,7 @@ impl Plugin for HudPlugin {
             .init_resource::<HudActionFade>()
             .add_systems(Startup, (spawn_hud_band, spawn_hud, spawn_action_buttons))
             .add_systems(Update, update_hud.after(GameMutation))
+            .add_systems(Update, update_won_previously.after(GameMutation))
             .add_systems(Update, announce_auto_complete.after(GameMutation))
             .add_systems(Update, update_selection_hud)
             .add_systems(
@@ -481,6 +504,15 @@ fn spawn_hud(font_res: Option<Res<FontResource>>, mut commands: Commands) {
                     font_body.clone(),
                     TextColor(STATE_INFO),
                 ));
+                t2.spawn((
+                    HudWonPreviously,
+                    Tooltip::new(
+                        "You've won this deal before. Same seed in your replay history.",
+                    ),
+                    Text::new(""),
+                    font_body.clone(),
+                    TextColor(STATE_SUCCESS),
+                ));
             });
 
             // Tier 3 — penalty / bonus. Undos and Recycles share the
@@ -834,6 +866,7 @@ fn spawn_modes_popover(
                     .spawn((
                         option,
                         ActionButton,
+                        PopoverRow,
                         Button,
                         Tooltip::new(tooltip),
                         Node {
@@ -987,6 +1020,7 @@ fn spawn_menu_popover(commands: &mut Commands, font_res: Option<&FontResource>)
                     .spawn((
                         option,
                         ActionButton,
+                        PopoverRow,
                         Button,
                         Tooltip::new(tooltip),
                         Node {
@@ -1117,9 +1151,20 @@ fn update_action_fade(
 /// `Last` (after `paint_action_buttons`) so a hover-state change in the
 /// same frame doesn't override the fade with an opaque idle / hover
 /// colour.
+#[allow(clippy::type_complexity)]
 fn apply_action_fade(
     fade: Res<HudActionFade>,
-    mut buttons: Query<(&Children, &mut BackgroundColor), With<ActionButton>>,
+    // Excludes `PopoverRow` so the auto-fade only applies to the
+    // top-level action bar buttons. Popover rows live inside an
+    // explicitly-opened dropdown panel and need to stay visible
+    // regardless of the bar's fade state — without the exclusion
+    // the rows fade to invisible while the popover container stays
+    // visible, leaving a solid background block with no readable
+    // content.
+    mut buttons: Query<
+        (&Children, &mut BackgroundColor),
+        (With<ActionButton>, Without<PopoverRow>),
+    >,
     mut text_q: Query<&mut TextColor>,
 ) {
     for (children, mut bg) in &mut buttons {
@@ -1480,6 +1525,42 @@ fn lerp_text_color(from: Color, to: Color, t: f32) -> Color {
     )
 }
 
+/// Sets the [`HudWonPreviously`] text to "✓ Won before" whenever the
+/// current deal's seed + draw_mode + mode triple matches an entry in
+/// the rolling [`ReplayHistory`]. Cleared while the active game is won
+/// (the on-screen "Game won!" cue already conveys victory) and on
+/// fresh deals the player hasn't won before.
+///
+/// Lives in its own system rather than `update_hud` to keep this
+/// orthogonal: `update_hud`'s query disambiguation is already busy
+/// enough; threading another marker through every Without filter
+/// would touch ~10 unrelated queries for no benefit.
+fn update_won_previously(
+    game: Res<GameStateResource>,
+    // Optional because the HUD plugin's headless tests run without
+    // `StatsPlugin` and therefore without this resource. With the
+    // resource absent there's no history to compare against; the
+    // indicator just stays empty.
+    history: Option<Res<crate::stats_plugin::ReplayHistoryResource>>,
+    mut q: Query<&mut Text, With<HudWonPreviously>>,
+) {
+    let Ok(mut text) = q.single_mut() else {
+        return;
+    };
+    let won_before = !game.0.is_won
+        && history.as_ref().is_some_and(|h| {
+            h.0.replays.iter().any(|r| {
+                r.seed == game.0.seed
+                    && r.draw_mode == game.0.draw_mode
+                    && r.mode == game.0.mode
+            })
+        });
+    let next = if won_before { "\u{2713} Won before" } else { "" };
+    if text.0 != next {
+        text.0 = next.to_string();
+    }
+}
+
 #[allow(clippy::type_complexity, clippy::too_many_arguments)]
 fn update_hud(
     game: Res<GameStateResource>,

solitaire_engine/src/input_plugin.rs

@@ -35,15 +35,15 @@ use crate::card_plugin::{
     CardEntity, HintHighlight, HintHighlightTimer, STACK_FAN_FRAC, TABLEAU_FACEDOWN_FAN_FRAC,
     TABLEAU_FAN_FRAC,
 };
-use crate::ui_theme::MOTION_DRAG_REJECT_SECS;
+use crate::ui_theme::{MOTION_DRAG_REJECT_SECS, STATE_WARNING};
 use solitaire_core::game_state::DrawMode;
 use crate::challenge_plugin::CHALLENGE_UNLOCK_LEVEL;
 use crate::events::{
     DrawRequestEvent, ForfeitRequestEvent, HintVisualEvent, InfoToastEvent, MoveRejectedEvent,
-    MoveRequestEvent, NewGameConfirmEvent, NewGameRequestEvent, StartZenRequestEvent,
+    MoveRequestEvent, NewGameRequestEvent, StartZenRequestEvent, StateChangedEvent,
-    StateChangedEvent, UndoRequestEvent,
+    UndoRequestEvent,
 };
-use crate::game_plugin::GameMutation;
+use crate::game_plugin::{ConfirmNewGameScreen, GameMutation, RestorePromptScreen};
 use crate::pause_plugin::PausedResource;
 use crate::progress_plugin::ProgressResource;
 use crate::layout::{Layout, LayoutResource};
@@ -54,21 +54,15 @@ use crate::time_attack_plugin::TimeAttackResource;
 /// Z-depth used for cards while being dragged — above all resting cards.
 const DRAG_Z: f32 = 500.0;
 
-/// Shared countdown state for the new-game double-press confirmation
+/// Solver budgets used by the H-key hint system.
-/// flow.
 ///
-/// Using a resource (instead of `Local`) lets the keyboard sub-systems
+/// Wraps `solitaire_core::solver::SolverConfig` as a Bevy resource so
-/// share the same countdown state without needing to pass values
+/// tests can inject tighter budgets to exercise the heuristic-fallback
-/// between them. Forfeit no longer has a keyboard countdown — `G` now
+/// path. Production initialises this to `SolverConfig::default()` (100k
-/// fires `ForfeitRequestEvent` and `PausePlugin` shows a real
+/// move / 200k state budgets, the same numbers the new-game retry loop
-/// `ForfeitConfirmScreen` modal.
+/// uses).
-#[derive(Resource, Debug, Default)]
+#[derive(Resource, Debug, Clone, Default)]
-struct KeyboardConfirmState {
+pub struct HintSolverConfig(pub solitaire_core::solver::SolverConfig);
-    /// Seconds remaining in the new-game confirmation window (> 0 while open).
-    new_game_countdown: f32,
-    /// True while we are waiting for the second N press to confirm a new game.
-    new_game_pending: bool,
-}
 
 /// Registers keyboard, mouse, and touch input systems.
 ///
@@ -89,8 +83,8 @@ pub struct InputPlugin;
 impl Plugin for InputPlugin {
     fn build(&self, app: &mut App) {
         app.init_resource::<HintCycleIndex>()
-            .init_resource::<KeyboardConfirmState>()
+            .init_resource::<HintSolverConfig>()
-            .add_message::<NewGameConfirmEvent>()
+            .init_resource::<crate::pending_hint::PendingHintTask>()
             .add_message::<StartZenRequestEvent>()
             .add_message::<InfoToastEvent>()
             .add_message::<ForfeitRequestEvent>()
@@ -116,13 +110,21 @@ impl Plugin for InputPlugin {
                     .chain(),
             )
             .add_systems(Update, handle_fullscreen)
-            .add_systems(Update, reset_hint_cycle_on_state_change);
+            .add_systems(Update, reset_hint_cycle_on_state_change)
+            // Async hint pipeline: state-change drop runs before the
+            // poll system so a move applied this frame cancels any
+            // in-flight task before its result can be surfaced.
+            .add_systems(
+                Update,
+                (
+                    crate::pending_hint::drop_pending_hint_on_state_change,
+                    crate::pending_hint::poll_pending_hint_task,
+                )
+                    .chain(),
+            );
     }
 }
 
-/// Seconds after the first N press during which a second N confirms new game.
-const NEW_GAME_CONFIRM_WINDOW: f32 = 3.0;
-
 /// Bundles the event writers needed by the core keyboard handler.
 ///
 /// Keeping these in a [`SystemParam`] avoids hitting Bevy's 16-parameter limit.
@@ -130,43 +132,39 @@ const NEW_GAME_CONFIRM_WINDOW: f32 = 3.0;
 struct CoreKeyboardMessages<'w> {
     undo: MessageWriter<'w, UndoRequestEvent>,
     new_game: MessageWriter<'w, NewGameRequestEvent>,
-    confirm_event: MessageWriter<'w, NewGameConfirmEvent>,
     info_toast: MessageWriter<'w, InfoToastEvent>,
     draw: MessageWriter<'w, DrawRequestEvent>,
 }
 
-/// Handles the core keyboard shortcuts: U (undo), N (new game + confirmation
+/// Handles the core keyboard shortcuts: U (undo), N (new game), Z (zen mode),
-/// window), Z (zen mode), D / Space (draw), and ticks down the new-game
+/// D / Space (draw).
-/// confirmation countdown each frame.
+///
+/// `N` fires `NewGameRequestEvent` straight through; the existing
+/// `handle_new_game` flow shows the `ConfirmNewGameScreen` modal when
+/// the current game is in progress, so a single press surfaces a real
+/// Confirm / Cancel UI instead of a "press N again" toast. `Shift+N`
+/// keeps the keyboard power-user bypass by setting `confirmed: true`.
+///
+/// While the confirm modal or the restore prompt is already open, the
+/// system skips the N branch so those modals' own input handlers can
+/// process N (cancel / start-new-game) without us re-firing a request
+/// the same frame.
 #[allow(clippy::too_many_arguments)]
 fn handle_keyboard_core(
     keys: Res<ButtonInput<KeyCode>>,
     paused: Option<Res<PausedResource>>,
     progress: Option<Res<ProgressResource>>,
-    game: Option<Res<GameStateResource>>,
-    time: Res<Time>,
-    mut confirm: ResMut<KeyboardConfirmState>,
     mut ev: CoreKeyboardMessages<'_>,
     mut time_attack: Option<ResMut<TimeAttackResource>>,
     selection: Option<Res<SelectionState>>,
     mut zen_requests: MessageReader<StartZenRequestEvent>,
+    confirm_screens: Query<(), With<ConfirmNewGameScreen>>,
+    restore_prompts: Query<(), With<RestorePromptScreen>>,
 ) {
     if paused.is_some_and(|p| p.0) {
         return;
     }
 
-    // Tick down the new-game confirmation window each frame.
-    if confirm.new_game_countdown > 0.0 {
-        confirm.new_game_countdown -= time.delta_secs();
-        if confirm.new_game_countdown <= 0.0 {
-            confirm.new_game_countdown = 0.0;
-            if confirm.new_game_pending {
-                confirm.new_game_pending = false;
-                ev.info_toast.write(InfoToastEvent("New game cancelled".to_string()));
-            }
-        }
-    }
-
     if keys.just_pressed(KeyCode::KeyU) {
         ev.undo.write(UndoRequestEvent);
     }
@@ -183,27 +181,24 @@ fn handle_keyboard_core(
                     mode: Some(solitaire_core::game_state::GameMode::Classic),
                     confirmed: false,
                 });
-                confirm.new_game_countdown = 0.0;
                 return;
             }
 
-        let active_game = game.as_ref().is_some_and(|g| g.0.move_count > 0 && !g.0.is_won);
+        // The confirm modal and restore prompt own N while they're up —
-        let shift_held = keys.pressed(KeyCode::ShiftLeft) || keys.pressed(KeyCode::ShiftRight);
+        // they cancel / accept respectively. Skipping here prevents us
-        if shift_held || !active_game {
+        // from firing a fresh request the same frame those modals close.
-            // Shift+N or no active game — start immediately, no confirmation.
+        if !confirm_screens.is_empty() || !restore_prompts.is_empty() {
-            ev.new_game.write(NewGameRequestEvent::default());
+            // intentional: defer to those modals' input handlers.
-            confirm.new_game_countdown = 0.0;
-            confirm.new_game_pending = false;
-        } else if confirm.new_game_countdown > 0.0 {
-            // Second press within the window — confirmed.
-            ev.new_game.write(NewGameRequestEvent::default());
-            confirm.new_game_countdown = 0.0;
-            confirm.new_game_pending = false;
         } else {
-            // First press on an active game — require confirmation.
+            let shift_held = keys.pressed(KeyCode::ShiftLeft) || keys.pressed(KeyCode::ShiftRight);
-            confirm.new_game_countdown = NEW_GAME_CONFIRM_WINDOW;
+            ev.new_game.write(NewGameRequestEvent {
-            confirm.new_game_pending = true;
+                seed: None,
-            ev.confirm_event.write(NewGameConfirmEvent);
+                mode: None,
+                // Shift+N skips the confirm modal for keyboard power-users;
+                // bare N falls through `handle_new_game`'s active-game check
+                // and shows the modal when a game is in progress.
+                confirmed: shift_held,
+            });
         }
     }
 
@@ -236,22 +231,29 @@ fn handle_keyboard_core(
     // Esc is handled by `PausePlugin` (overlay toggle + paused flag).
 }
 
-/// Handles the H key: cycles through all available hints, highlighting the
+/// Handles the H key: spawn an async solver task on
-/// source card yellow for 2 s and showing a descriptive toast.
+/// `AsyncComputeTaskPool` whose result `pending_hint::poll_pending_hint_task`
+/// turns into hint visuals one frame later.
 ///
-/// The hint index wraps around once all hints have been cycled through. When no
+/// Median solve time is ~2 ms but pathological positions can hit the
-/// moves are available a "No hints available" toast is shown instead.
+/// `SolverConfig::default()` cap at ~120 ms; running synchronously
-#[allow(clippy::too_many_arguments)]
+/// (the v0.17.0 behaviour) blocked the main thread on the same frame
+/// the player pressed H. Cancel-on-replace lives in
+/// `PendingHintTask::spawn` — a fresh H press while a previous task
+/// is in flight drops the previous task's handle.
+///
+/// Special-cases: when the game is already won, surface a "Game won!"
+/// toast instead of asking the solver. The poll system handles the
+/// "no legal moves" toast on the heuristic fallback path so the
+/// handler here only needs to dispatch.
 fn handle_keyboard_hint(
     keys: Res<ButtonInput<KeyCode>>,
     paused: Option<Res<PausedResource>>,
     game: Option<Res<GameStateResource>>,
     layout: Option<Res<LayoutResource>>,
-    mut hint_cycle: ResMut<HintCycleIndex>,
+    solver_config: Res<HintSolverConfig>,
-    mut commands: Commands,
+    mut pending_hint: ResMut<crate::pending_hint::PendingHintTask>,
-    mut card_entities: Query<(Entity, &CardEntity, &mut Sprite)>,
     mut info_toast: MessageWriter<InfoToastEvent>,
-    mut hint_visual: MessageWriter<HintVisualEvent>,
 ) {
     if paused.is_some_and(|p| p.0) {
         return;
@@ -269,23 +271,51 @@ fn handle_keyboard_hint(
 
     let Some(_layout_res) = layout else { return };
 
-    let hints = all_hints(&g.0);
+    pending_hint.spawn(g.0.clone(), solver_config.0);
-    if hints.is_empty() {
-        info_toast.write(InfoToastEvent("No hints available".to_string()));
-        return;
 }
 
-    // Pick the hint at the current cycle index (wrapping) and advance.
+/// Heuristic hint helper used by `pending_hint::poll_pending_hint_task`
+/// when the solver returns `Inconclusive` or `Unwinnable`.
+///
+/// Picks the hint at `HintCycleIndex % hints.len()` (wrapping) and
+/// advances the index so successive H presses on a stuck position
+/// cycle through every legal move. Returns `None` when no legal move
+/// exists at all — the caller surfaces a "No hints available" toast.
+pub fn find_heuristic_hint(
+    game: &GameState,
+    hint_cycle: &mut HintCycleIndex,
+) -> Option<(PileType, PileType)> {
+    let hints = all_hints(game);
+    if hints.is_empty() {
+        return None;
+    }
     let idx = hint_cycle.0 % hints.len();
     hint_cycle.0 = hint_cycle.0.wrapping_add(1);
-    let (from, to, _count) = &hints[idx];
+    let (from, to, _count) = hints[idx].clone();
+    Some((from, to))
+}
 
+/// Apply the visual + toast effects for a single chosen hint move.
+///
+/// Shared between the solver-driven and heuristic-driven hint paths so
+/// both produce identical player-facing feedback. Called from
+/// `pending_hint::poll_pending_hint_task` once the async solver task
+/// resolves.
+pub fn emit_hint_visuals(
+    game: &GameState,
+    from: &PileType,
+    to: &PileType,
+    commands: &mut Commands,
+    mut card_entities: Query<(Entity, &CardEntity, &mut Sprite)>,
+    info_toast: &mut MessageWriter<InfoToastEvent>,
+    hint_visual: &mut MessageWriter<HintVisualEvent>,
+) {
     // When the hint points at the stock (draw suggestion) there is no
     // face-up card to highlight — show a toast instead.
     // If the stock is empty, pressing D will recycle the waste rather
     // than draw a card, so the toast text must reflect that.
     if *from == PileType::Stock {
-        let stock_empty = g.0.piles
+        let stock_empty = game.piles
             .get(&PileType::Stock)
             .is_some_and(|p| p.cards.is_empty());
         let msg = if stock_empty {
@@ -298,15 +328,18 @@ fn handle_keyboard_hint(
     }
 
     // Find the top face-up card in the source pile and highlight it.
-    let top_card_id = g.0.piles.get(from)
+    let top_card_id = game.piles.get(from)
         .and_then(|p| p.cards.last().filter(|c| c.face_up))
         .map(|c| c.id);
     if let Some(card_id) = top_card_id {
         for (entity, card_entity, mut sprite) in card_entities.iter_mut() {
             if card_entity.card_id == card_id {
                 // Tint the card gold without replacing the Sprite (which would
-                // discard the image handle set by CardImageSet).
+                // discard the image handle set by CardImageSet). Uses the
-                sprite.color = Color::srgba(1.0, 1.0, 0.4, 1.0);
+                // design-system `STATE_WARNING` token so the source-card
+                // tint matches the destination pile highlight, both of
+                // which signal "look here" for the hint.
+                sprite.color = STATE_WARNING;
                 commands.entity(entity)
                     .insert(HintHighlight { remaining: 2.0 })
                     .insert(HintHighlightTimer(2.0));
@@ -327,7 +360,7 @@ fn handle_keyboard_hint(
     // player keeps thinking in suit terms; otherwise fall back to "foundation".
     let msg = match to {
         PileType::Foundation(_) => {
-            let claimed = g.0.piles.get(to).and_then(|p| p.claimed_suit());
+            let claimed = game.piles.get(to).and_then(|p| p.claimed_suit());
             if let Some(suit) = claimed {
                 let suit_name = match suit {
                     Suit::Clubs => "Clubs",
@@ -614,10 +647,23 @@ fn end_drag(
     }
 
     // If the drag was never committed (user tapped without moving far enough),
-    // treat it as a click: just cancel the pending drag and resync card positions.
+    // treat it as a click: cancel the pending drag and exit. We deliberately
+    // do NOT fire `StateChangedEvent` here — `start_drag` only mutates the
+    // `DragState` resource on press, never card transforms, so an uncommitted
+    // drag has no visual side effect to undo.
+    //
+    // Firing one would race a CardAnim that's already in flight on the same
+    // card. Specifically: on a successful double-click, `handle_double_click`
+    // fires `MoveRequestEvent`, `start_drag` picks the card up the same
+    // frame (uncommitted), and `handle_move` queues a `StateChangedEvent` →
+    // `sync_cards_on_change` starts a slide animation. When the player
+    // releases the button mid-slide, `end_drag` would fire a second
+    // `StateChangedEvent`, `sync_cards_on_change` would see the card mid-
+    // animation (`cur != target`), and replace the in-flight CardAnim with
+    // a fresh one — restarting the slide and reading on screen as the move
+    // animation playing twice.
     if !drag.committed {
         drag.clear();
-        changed.write(StateChangedEvent);
         return;
     }
     let Some(layout) = layout else {
@@ -1280,32 +1326,37 @@ fn handle_double_click(
         // Priority 2: if the player clicked the base of a multi-card face-up
         // stack (card_ids.len() > 1), try moving the whole stack to another
         // tableau column.
-        if card_ids.len() > 1 {
+        if card_ids.len() > 1
-            let Some(bottom_card) = game.0.piles.get(&pile)
+            && let Some(bottom_card) = game.0.piles.get(&pile)
-                .and_then(|p| p.cards.get(stack_index)) else { return };
+                .and_then(|p| p.cards.get(stack_index))
-            if let Some((dest, count)) = best_tableau_destination_for_stack(
+            && let Some((dest, count)) = best_tableau_destination_for_stack(
                 bottom_card,
                 &pile,
                 &game.0,
                 card_ids.len(),
-            ) {
+            )
+        {
             moves.write(MoveRequestEvent {
                 from: pile,
                 to: dest,
                 count,
             });
-            } else {
+            return;
-                // No legal destination for the stack — play the invalid-move
+        }
-                // sound and shake the source pile cards as feedback.
+
-                // `MoveRejectedEvent` with `from == to` routes the shake to
+        // Both priorities failed — play the invalid-move sound and shake
-                // the source pile (which `start_shake_anim` reads from `ev.to`).
+        // the source pile as feedback. `MoveRejectedEvent` with
+        // `from == to` routes the shake to the source pile (which
+        // `start_shake_anim` reads from `ev.to`). Pre-fix, this branch
+        // only fired for multi-card stacks, so a double-click on a
+        // single card with no legal destination did nothing — no
+        // sound, no shake. Now both single-card and stack misses get
+        // the same feedback.
         rejected.write(MoveRejectedEvent {
             from: pile.clone(),
             to: pile,
             count: card_ids.len(),
         });
-            }
-        }
     } else {
         // Single click — record the time.
         last_click.insert(top_card_id, now);
@@ -1960,15 +2011,6 @@ mod tests {
         assert!(hints.is_empty(), "no hint should exist when the game is truly stuck");
     }
 
-    /// Const-assert that `NEW_GAME_CONFIRM_WINDOW` is positive so the
-    /// confirmation countdown actually opens on the first N press.
-    ///
-    /// Mirrors the existing `forfeit_confirm_window_is_positive` test.
-    #[test]
-    fn new_game_confirm_window_is_positive() {
-        const { assert!(NEW_GAME_CONFIRM_WINDOW > 0.0, "NEW_GAME_CONFIRM_WINDOW must be > 0"); }
-    }
-
     // -----------------------------------------------------------------------
     // Drag-rejection return tween — `CardAnimation` replaces the legacy
     // `ShakeAnim` on the dragged cards. The audio cue
@@ -2125,5 +2167,53 @@ mod tests {
             anim.end_z
         );
     }
+
+    // -----------------------------------------------------------------------
+    // Hint system — async port (v0.18.0+)
+    //
+    // `handle_keyboard_hint` no longer runs the solver inline; it
+    // spawns an `AsyncComputeTaskPool` task whose result the polling
+    // system in `pending_hint` turns into hint visuals one frame
+    // later. The behaviour contract this section pins is "pressing H
+    // populates `PendingHintTask`" — the spawn-to-emit pipeline is
+    // covered end-to-end in `pending_hint::tests`.
+    // -----------------------------------------------------------------------
+
+    /// Pressing H on a non-paused, non-won game with a live
+    /// `GameStateResource` + `LayoutResource` must populate
+    /// `PendingHintTask`. The polling system, exercised in
+    /// `pending_hint::tests`, drives the result to a visual event.
+    #[test]
+    fn pressing_h_spawns_pending_hint_task() {
+        let mut app = App::new();
+        app.add_plugins(MinimalPlugins);
+        app.add_message::<InfoToastEvent>();
+        app.add_message::<HintVisualEvent>();
+        app.init_resource::<HintCycleIndex>();
+        app.init_resource::<HintSolverConfig>();
+        app.init_resource::<crate::pending_hint::PendingHintTask>();
+        app.init_resource::<ButtonInput<KeyCode>>();
+        app.insert_resource(crate::layout::LayoutResource(
+            crate::layout::compute_layout(Vec2::new(1280.0, 800.0)),
+        ));
+        app.insert_resource(GameStateResource(GameState::new(42, DrawMode::DrawOne)));
+        app.add_systems(Update, handle_keyboard_hint);
+
+        // Simulate the H key being pressed this frame.
+        {
+            let mut input = app.world_mut().resource_mut::<ButtonInput<KeyCode>>();
+            input.release(KeyCode::KeyH);
+            input.clear();
+            input.press(KeyCode::KeyH);
+        }
+        app.update();
+
+        assert!(
+            app.world()
+                .resource::<crate::pending_hint::PendingHintTask>()
+                .is_pending(),
+            "pressing H must spawn an async hint task",
+        );
+    }
 }