diff --git a/solitaire_server/web/play.html b/solitaire_server/web/play.html
index 9b0ca6f..44bbb1c 100644
--- a/solitaire_server/web/play.html
+++ b/solitaire_server/web/play.html
@@ -7,11 +7,44 @@
     <style>
         * { box-sizing: border-box; margin: 0; padding: 0; }
         body { background: #000; overflow: hidden; }
-        #bevy-canvas { display: block; width: 100vw; height: 100vh; }
+        /* #bevy-wrap fills the viewport but is capped to the GPU's real
+           MAX_TEXTURE_SIZE via an inline max-width/height set before init
+           (see the clamp script below). fit_canvas_to_parent sizes the wgpu
+           surface to this element, so capping it keeps the surface within
+           WebGL2's per-dimension limit. Centered so 2048-limited devices
+           letterbox symmetrically. */
+        #bevy-wrap {
+            width: 100vw; height: 100vh; margin: 0 auto;
+            display: flex; align-items: center; justify-content: center;
+        }
+        #bevy-canvas { display: block; width: 100%; height: 100%; }
     </style>
 </head>
 <body>
-    <canvas id="bevy-canvas"></canvas>
+    <div id="bevy-wrap"><canvas id="bevy-canvas"></canvas></div>
+    <script>
+        // Clamp the Bevy canvas's backing buffer to the device's real WebGL2
+        // MAX_TEXTURE_SIZE *before* the wasm initialises. `fit_canvas_to_parent`
+        // sizes the wgpu surface to #bevy-wrap; a surface larger than the GPU
+        // limit (only 2048 on many laptop/integrated GPUs — e.g. a 2560-wide
+        // 1440p display) makes Surface::configure panic and kills the WASM
+        // thread. Querying the real maximum means only devices at the 2048 floor
+        // letterbox; everyone else still fills the viewport. Runs synchronously
+        // before the deferred module script below.
+        (function clampCanvasToGpuLimit() {
+            var max = 2048; // WebGL2 spec floor — the safe fallback
+            try {
+                var probe = document.createElement("canvas").getContext("webgl2");
+                if (probe) {
+                    var m = probe.getParameter(probe.MAX_TEXTURE_SIZE);
+                    if (m && m > 0) max = m;
+                }
+            } catch (e) { /* keep the safe 2048 floor */ }
+            var wrap = document.getElementById("bevy-wrap");
+            wrap.style.maxWidth = max + "px";
+            wrap.style.maxHeight = max + "px";
+        })();
+    </script>
     <script type="module">
         import init from "/web/pkg/canvas.js";
         // solitaire_wasm.js provides SolitaireGame with the full debug / automation
