Update app.py

app.py

@@ -68,7 +68,7 @@ def predict(pre_op_sphere, pre_op_cylinder, pre_op_axis):
     return f"Predicted Laser Prescription:\nSphere: {predicted_sphere:.2f}\nCylinder: {predicted_cylinder:.2f}\nAxis: {predicted_axis:.2f}"
 
 css = """
-    #gradio-app-container {
+    gradio-app {
         background-color: #131517;
     }
 """