Update app.py

app.py

@@ -173,10 +173,7 @@ body {
     content: '\f007';
 }
 """
-demo = gr.Interface(fn=greet, inputs="text", outputs="text", title="text-classification app", css="body {
-    background-color: #f6f6f6;
-    font-family: Arial, sans-serif;
-}", 
+demo = gr.Interface(fn=greet, inputs="text", outputs="text", title="text-classification app", css=css, 
                      thumbnail="https://i.imgur.com/5rkKx5A.png", 
                      layout="vertical", description="This is a demo for text classification.")
 demo.launch()