Update app.py

app.py

@@ -136,12 +136,14 @@ demo = gr.ChatInterface(
         color_accent_soft_dark="transparent"
     ),
     css=css,
-    retry_btn="Retry",
-    undo_btn="Undo",
-    clear_btn="Clear",
-    submit_btn="Send",
     description="AI Prompt Engineering Tutor: Master the art of crafting effective prompts",
-    chatbot=gr.Chatbot(scale=1, placeholder=PLACEHOLDER)
+    chatbot=gr.Chatbot(scale=1, placeholder=PLACEHOLDER),
+    additional_inputs=[
+        gr.Button("Retry", variant="secondary"),
+        gr.Button("Undo", variant="secondary"),
+        gr.Button("Clear", variant="secondary"),
+    ],
+    submit_btn=gr.Button("Send", variant="primary"),
 )
 
 if __name__ == "__main__":