Update app.py

app.py

@@ -218,14 +218,16 @@ def send_example(example_text, history, max_tokens, temperature, top_p, qa_chain
 # Gradio Interface Layout
 # ---------------------------
 # Create a theme instance using one of Gradio's prebuilt themes
-theme = gr.themes.Default(primary_hue="sky").set(
-    # For identical styling in dark mode, set these variables to None.
-    body_background_fill_dark=None,
-    input_border_color_dark=None,
-    slider_color_dark=None,
-)
+# Custom CSS that forces light mode regardless of browser settings.
+custom_css = """
+:root {
+    color-scheme: light !important;
+    background-color: #fff !important;
+    color: #333 !important;
+}
+"""
 
-with gr.Blocks(theme=theme) as demo:
+with gr.Blocks(css=custom_css) as demo:
     # Insert custom CSS for layout:
     gr.HTML("""
     <script>