Fix Gradio 6 API: theme/css to launch(), drop show_download_button

app.py

@@ -212,9 +212,11 @@ EXAMPLES = [
 
 CSS = """
 #col-container { max-width: 900px; margin: 0 auto; }
+.dark .gradio-container { color: var(--body-text-color); }
 """
 
-with gr.Blocks(theme=gr.themes.Citrus(), css=CSS) as demo:
+# Gradio 6 moved `theme` / `css` from the Blocks constructor to `launch()`.
+with gr.Blocks() as demo:
     with gr.Column(elem_id="col-container"):
         gr.Markdown(
             """
@@ -243,7 +245,7 @@ with gr.Blocks(theme=gr.themes.Citrus(), css=CSS) as demo:
         )
         run_button = gr.Button("Generate", variant="primary")
 
-        video_out = gr.Video(label="Audio + video", autoplay=True, show_download_button=True)
+        video_out = gr.Video(label="Audio + video", autoplay=True)
         audio_out = gr.Audio(label="Audio track (48 kHz)")
 
         with gr.Accordion("Advanced settings", open=False):
@@ -286,4 +288,4 @@ with gr.Blocks(theme=gr.themes.Citrus(), css=CSS) as demo:
         outputs=[video_out, audio_out, seed, details_out],
     )
 
-demo.queue(max_size=8).launch(mcp_server=True)
+demo.queue(max_size=8).launch(theme=gr.themes.Citrus(), css=CSS, mcp_server=True)