add: style improv

app.py

@@ -457,6 +457,9 @@ def create_chat_interface():
     footer {
         display: none !important;
     }
+    #chatbot_box{
+        flex-grow: 1 !important;
+    }
     """
     with gr.Blocks(fill_height=True, fill_width=True, css=css) as demo:
         chatbot = gr.Chatbot(