add css

maybe it will work?

app.py

@@ -14,6 +14,7 @@ if __name__ == "__main__":
     title = 'Sentiment Analysis', 
     description = 'Determine how negative or positive a given sentiment is. Input a sentence or two and see what the model "thinks."',
     btn = gr.Button("Run"),
+    css="app.css",
     examples=[
         ["better than nothing, I guess... I guess you get what you pay for :("],
         ["This is better than nothing. You get what you pay for!"],