diff --git a/nanochat/ui.html b/nanochat/ui.html
index 0f625d9..b85532a 100644
--- a/nanochat/ui.html
+++ b/nanochat/ui.html
@@ -14,6 +14,11 @@
             box-sizing: border-box;
         }
 
+        html, body{
+            height: 100%;
+            margin: 0;
+        }
+
         body {
             font-family: ui-sans-serif, -apple-system, system-ui, "Segoe UI", Helvetica, "Apple Color Emoji", Arial, sans-serif, "Segoe UI Emoji", "Segoe UI Symbol";
             background-color: #ffffff;
@@ -107,7 +112,6 @@
         .message.assistant .message-content {
             background: transparent;
             border: none;
-            padding: 0.25rem 0;
             cursor: pointer;
             border-radius: 0.5rem;
             padding: 0.5rem;