Update app.py

app.py

@@ -598,6 +598,10 @@ def draw(state, drawpad):
 ### Main application
 
 css = f"""
+.body {{
+    background: unset;
+}}
+
 #run-button {{
     font-size: 18pt;
     background-image: linear-gradient(to right, #4338ca 0%, #26a0da 51%, #4338ca 100%);