Update app.py

app.py

@@ -140,7 +140,7 @@ def save_uploaded_files(files):
     return saved_paths
 
 # Gradio UI Layout
-with gr.Blocks() as demo:
+with gr.Blocks(css=custom_css) as demo:
     gr.Markdown("# Systematic Review Generator for Research Papers")
     
     with gr.Accordion("How to Use This App", open=True):
@@ -206,7 +206,7 @@ with gr.Blocks() as demo:
     )
 
 # Add CSS styling
-css = """
+custom_css = """
 <style>
     #generate_button {
         background: linear-gradient(135deg, #4a00e0 0%, #8e2de2 100%); /* Purple gradient */