Email Templates

Hi there! I have been struggling with getting the email editor to be consistent with CSS styling, particularly inheriting things like border radius changes. I would like to create more visually appealing emails by nesting elements within one another, but the editor doesn't seem to be able to handle it.

Would anyone mind uploading some template JSON files from any of their campaigns so I can see examples of how you got things to work? Particularly interested in nested groups of blocks with rounded corners and background styling handled via the UI controls - things lose their styling when they're more than a layer deep for me.