Update app.py

app.py

@@ -118,12 +118,12 @@ h1 {
 /* ---------- Messages ---------- */
 .message {
   max-width: 72%;
-  padding: 12px 14px;
-  border-radius: 14px;
-  margin-bottom: 10px;
-  line-height: 1.6;
-  font-size: 15px;
-  box-sizing: border-box;
+  padding: 8px 10px;
+  border-radius: 10px;
+  margin-bottom: 9px;
+  line-height: 1.0;
+  font-size: 14px;
+ box-sizing: content-box;;
 }
 
 .message.user {