Drop prompt label; cap app width at 1200px

app.py

@@ -330,16 +330,21 @@ Runs [Z-Image](https://huggingface.co/Tongyi-MAI/Z-Image) (live previews via TAE
 super-resolved result. The slider compares Z-Image's native VAE output to the PiD upscale.
 """
 
-CSS = " .dark .gradio-container { color: var(--body-text-color);"
+CSS = """
+.gradio-container { max-width: 1200px !important; margin: auto !important; }
+.dark .gradio-container { color: var(--body-text-color); }
+"""
 
 with gr.Blocks(theme=gr.themes.Citrus(), css=CSS) as demo:
     gr.Markdown(DESCRIPTION)
     with gr.Row():
         prompt = gr.Textbox(
-            label="Prompt",
+            show_label=False,
+            placeholder="Describe what you want to generate…",
             value="A photorealistic close-up of a brown tabby cat sitting on a rustic wooden table, morning light, ultra-detailed fur",
             lines=1,
             scale=4,
+            container=False,
         )
         run = gr.Button("Run", variant="primary", scale=1)