Update app.py

app.py

@@ -391,7 +391,7 @@ with gr.Blocks(title="Document Q&A System", css=custom_css) as demo:
 
     with gr.Row():
         with gr.Column(scale=1):
-            with gr.Box(elem_classes="file-upload"):
+            with gr.Group(elem_classes="file-upload"):
                 file_input = gr.File(
                     label="Upload Document",
                     file_types=[".pdf", ".txt", ".doc", ".docx"],
@@ -406,7 +406,7 @@ with gr.Blocks(title="Document Q&A System", css=custom_css) as demo:
 
     with gr.Row():
         with gr.Column(scale=2):
-            with gr.Box(elem_classes="chat-container"):
+            with gr.Group(elem_classes="chat-container"):
                 chatbot = gr.Chatbot(
                     height=500,
                     type="messages",