diff --git a/web/chat.html b/web/chat.html
index 92ae52f..d941569 100644
--- a/web/chat.html
+++ b/web/chat.html
@@ -14,7 +14,7 @@
   * { box-sizing: border-box; margin: 0; padding: 0; }
   body {
     font-family: monospace; background: #fff; color: #000;
-    padding: 2rem; max-width: 1100px; margin: 0 auto;
+    padding: 2rem; max-width: none; margin: 0;
   }
   /* two-panel layout: setup | chat, 50:50 on desktop, stacked on phone */
   .app {