Update app.py

app.py

@@ -245,7 +245,7 @@ css = """
     border: 1px solid #ccc; 
     }
     /* Style for the upvote button */
-    .gr-button.warning {  
+    .warning {  
         width: 100%;  
         max-width: 300px;  
         margin: 0 auto;