Set maximum page size

Hi all,

Is there any way to set maximum page sizes? I’ve decided that I’d like to restrict my page design to mobile only (as this will help me control design and ensure elements are scaled correctly).

I know that I can put elements into a container and restrict this size, but the background for the page still bleeds out to the edges of the web-page. Is there any way to do this in Bubble, or am I stuck?