Update app.py

app.py

@@ -127,6 +127,7 @@ demo = gr.ChatInterface(
     theme=gr.themes.Soft(primary_hue="indigo", secondary_hue="blue", neutral_hue="gray",font=[gr.themes.GoogleFont("Exo"), "ui-sans-serif", "system-ui", "sans-serif"]).set(
         body_background_fill_dark="#0f172a",
         block_background_fill_dark="#0f172a",
+        block_border_width="1px",
         block_title_background_fill_dark="#070d1b",
         input_background_fill_dark="#0c1425",
         button_secondary_background_fill_dark="#070d1b",