change simple

app.py

@@ -108,7 +108,7 @@ with gr.Blocks(css=css, elem_id="demo-container") as demo:
                         with gr.Row():
                             prompt = gr.Textbox(label="Prompt",value="a eyes closed girl,shut eyes",placeholder="Your prompt (what you want in place of what is erased)", elem_id="prompt")
                             
-                    btn = gr.Button("Img2Img", elem_id="run_button",scale=0)
+                    btn = gr.Button("Img2Img", elem_id="run_button",variant="primary")
                     
                     image_mask = gr.Image(sources=['upload','clipboard'],  elem_id="mask_upload", type="pil", label="Mask_Upload",height=400, value=None)
                     with gr.Accordion(label="Advanced Settings", open=False):