Update app.py

app.py

@@ -264,7 +264,7 @@ def create_gradio_app():
     }
     .header {
         text-align: center;
-        background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
+        background: linear-gradient(45deg, #26f1b5 0%, #307f3f 100%);
         color: white;
         padding: 20px;
         border-radius: 10px;