Update app.py

app.py

@@ -107,17 +107,7 @@ examples = [
     "Give me an example of an endangered species and let me know what I can do to help preserve it"
 ]
 
-custom_css = """
-#logo-img {
-    border: none !important;
-}
-#chat-message {
-    font-size: 14px;
-    min-height: 300px;
-}
-"""
-
-with gr.Blocks(analytics_enabled=False, css=custom_css) as demo:
+with gr.Blocks(analytics_enabled=False, theme=gr.themes.Monochrome()) as demo:
     cid = gr.State("")
 
     with gr.Row():