Update app.py

app.py

@@ -64,7 +64,7 @@ with gr.Blocks(title="LLM with TTS",head=head) as demo:
     msg = gr.Textbox()
     with gr.Row():
         clear = gr.ClearButton([msg, chatbot])
-        submit = gr.Button("Submit").click(call_generate_text, inputs=[msg, chatbot], outputs=[msg,chatbot])
+        submit = gr.Button("Submit",variant="primary").click(call_generate_text, inputs=[msg, chatbot], outputs=[msg,chatbot])
 
     gr.HTML("""
     <br>