pass theme/css to gr.Blocks() and add graceful spaces fallback

app.py

@@ -4,13 +4,27 @@ HuggingFace Space Demo (ZeroGPU)
 """
 
 import logging
+import os
 import sys
 import tempfile
 import time
 from pathlib import Path
 
 import gradio as gr
-import spaces
+
+# ZeroGPU support - graceful fallback for local development
+try:
+    import spaces
+    ZEROGPU_AVAILABLE = True
+except ImportError:
+    ZEROGPU_AVAILABLE = False
+    # Create a no-op decorator for local development
+    class spaces:
+        @staticmethod
+        def GPU(duration=60):
+            def decorator(fn):
+                return fn
+            return decorator
 
 # NOTE: Do NOT import torch or cordon at module level!
 # ZeroGPU requires all CUDA-related imports to happen inside @spaces.GPU functions.
@@ -191,7 +205,7 @@ THEME = gr.themes.Base(
 def create_interface():
     """Create the Gradio interface."""
     
-    with gr.Blocks(title="Cordon") as demo:
+    with gr.Blocks(title="Cordon", theme=THEME, css=CUSTOM_CSS) as demo:
         
         # Header
         gr.HTML("""
@@ -350,6 +364,7 @@ logger.info("=" * 60)
 logger.info("Cordon Space starting...")
 logger.info(f"Python version: {sys.version}")
 logger.info(f"Gradio version: {gr.__version__}")
+logger.info(f"ZeroGPU available: {ZEROGPU_AVAILABLE}")
 logger.info("PyTorch/Cordon loaded lazily inside @spaces.GPU function")
 logger.info("=" * 60)
 
@@ -360,7 +375,6 @@ try:
     logger.info("Gradio interface created successfully")
     
     # Detect if running on HuggingFace Spaces
-    import os
     is_hf_space = os.getenv("SPACE_ID") is not None
     
     if is_hf_space:
@@ -369,16 +383,11 @@ try:
         demo.launch(
             server_name="0.0.0.0",
             server_port=7860,
-            theme=THEME,
-            css=CUSTOM_CSS
         )
     else:
         # Local development: let Gradio find an available port
         logger.info("Running locally - auto-detecting available port")
-        demo.launch(
-            theme=THEME,
-            css=CUSTOM_CSS
-        )
+        demo.launch()
     logger.info("Demo launched successfully")
 except Exception as e:
     logger.error(f"Failed to launch demo: {str(e)}", exc_info=True)