Update app.py

app.py

@@ -137,11 +137,16 @@ def generate_image(
     ).frames[0][0]
 
     return out_img, current_seed
-
-with gr.Blocks() as demo:
-    gr.Markdown("# Wan 2.2 (14B) Image")
-    gr.Markdown("generate high quality images with Wan 2.2 14B")
-    with gr.Column():
+css="""
+#col-container {
+    margin: 0 auto;
+    max-width: 620px;
+}
+"""
+with gr.Blocks(css=css) as demo:
+    with gr.Column(elem_id="col-container"):
+       gr.Markdown("# Wan 2.2 (14B) Image")
+       gr.Markdown("generate high quality images with Wan 2.2 14B")
        with gr.Row():
           prompt_input = gr.Textbox(show_label=False,
                 max_lines=1,