Update app.py

app.py

@@ -249,20 +249,24 @@ with gr.Blocks(css=CSS, title="StitchMaster") as demo:
     # Seed + Start/End selection + Prompt + Stitch + Preview
     seed = gr.Number(value=0, precision=0, label="Seed (0 = random)")
 
-  with gr.Row():
-    with gr.Column(scale=1, min_width=420, elem_classes=["stitch-box"]):   
-        start_dd = gr.Dropdown(label="Start frame", choices=[], interactive=True)
-        end_dd = gr.Dropdown(label="End frame", choices=[], interactive=True)
-        prompt = gr.Textbox(
-            placeholder="Describe the transition between the selected start and end frames…",
-            lines=3, label="Prompt", elem_classes=["rounded"]
-        )
-        run_btn = gr.Button("Generate", elem_classes=["pill"])
-        add_tl_btn = gr.Button("Add to timeline", elem_classes=["pill"])
-        
-    with gr.Column(scale=1, min_width=420):
-        preview = gr.Video(label="Video output", interactive=False)
-   
+    with gr.Row():
+        # Left column: controls (with colored background via .stitch-box)
+        with gr.Column(scale=1, min_width=420, elem_classes=["stitch-box"]):
+            start_dd = gr.Dropdown(label="Start frame", choices=[], interactive=True)
+            end_dd = gr.Dropdown(label="End frame", choices=[], interactive=True)
+            prompt = gr.Textbox(
+                placeholder="Describe the transition between the selected start and end frames…",
+                lines=3,
+                label="Prompt",
+                elem_classes=["rounded"]
+            )
+            run_btn = gr.Button("Generate", elem_classes=["pill"])
+            add_tl_btn = gr.Button("Add to timeline", elem_classes=["pill"])
+
+        # Right column: preview video
+        with gr.Column(scale=1, min_width=420):
+            preview = gr.Video(label="Video output", interactive=False)
+
     # keep start/end dropdowns up to date based on which slots have images
     for comp in img_comps:
         comp.change(
@@ -302,4 +306,4 @@ with gr.Blocks(css=CSS, title="StitchMaster") as demo:
     )
 
 if __name__ == "__main__":
-    demo.queue().launch()
+    demo.queue().launch()