Update app.py

app.py

@@ -95,7 +95,8 @@ demo = gr.ChatInterface(
     ],
     theme=gr.themes.Soft(primary_hue="violet", secondary_hue="indigo", neutral_hue="gray",font=[gr.themes.GoogleFont("Exo"), "ui-sans-serif", "system-ui", "sans-serif"]).set(
         block_background_fill_dark="#16141c",
-        input_background_fill_dark="*neutral_900"
+        input_background_fill_dark="#292733",
+        button_secondary_background_fill_dark="#24212b"
     ),
     css=css,
     retry_btn="Retry",