Update app.py

app.py

@@ -74,8 +74,7 @@ with gr.Blocks(title="Materials Science Expert Chatbot") as demo:
 
     submit_btn.click(chat_with_groq, inputs=user_input, outputs=output)
 
-    # CSS for orange submit button
-    demo.load(lambda: None, js=None, css="""
+    gr.CSS("""
         #orange-btn {
             background-color: #f97316 !important;
             color: white !important;
@@ -84,6 +83,7 @@ with gr.Blocks(title="Materials Science Expert Chatbot") as demo:
         }
     """)
 
+
 # Launch the app
 if __name__ == "__main__":
     demo.launch()