Where did you put the sidebar for design? Where could you set padding and other things?
Same question, I just noticed I can’t see it in Cursor v3. 
Hey, Design Mode with the CSS properties sidebar isn’t available in Cursor 3 right now. This feature was in earlier versions, but it hasn’t been brought over to v3 yet.
The team is aware of the request. For now, as a workaround, describe the CSS changes you want directly to the agent in chat like “change padding to 16px on this button” or “center this div”, and it’ll update the code directly.
I’ll let you know if there are any updates on bringing this feature back.