Update app.py

app.py

@@ -179,6 +179,14 @@ examples=[["I'm planning a vacation to India. Can you suggest a one-week itinera
           ["What are some unique features of Python that make it stand out compared to other systems programming languages like C++,Java?", None, None, None, None, None,],
          ]
 
+css = """
+  #mkd {
+    height: 500px; 
+    overflow: auto; 
+    border: 1px solid #ccc; 
+  }
+"""
+
 with gr.Blocks(css=css) as chat:
     gr.HTML(TITLE)
     gr.ChatInterface(