Update app.py

app.py

@@ -102,6 +102,7 @@ css = """
 #run-button {
     width: 100%;
     margin-top: 10px;
+    display: block;
 }
 """
 
@@ -171,7 +172,7 @@ with gr.Blocks(css=css) as demo:
                     )
 
             # Full-width "Run" button
-            run_button = gr.Button("Run", scale=0, elem_id="run-button")
+            run_button = gr.Button("Run", elem_id="run-button")
 
         with gr.Column(elem_id="right-column"):
             gr.Markdown("### Prompt / Tag Input")