Styles that cap custom sizes/styles?

[laurelfulford]

Is your feature request related to a problem? Please describe.
Right now, you can make fonts really large, or add a ton of padding in the Gutenberg editor. But these styles don't always look great on smaller screens.

Describe the solution you'd like
Ideally this is a feature/option that will be available down the road in Gutenberg -- some kind of responsive scaling. For the short-term, it might be helpful to have some kind of control or cap coming from the theme, to make sure the more extreme sizes are scaled down.

Describe alternatives you've considered
Fixing with Custom CSS on a per-site basis, which does offer more control for the exact issues/styles. The downside is scaling this across each time it happens, and also it only is applied in cases where issues are reported. If too large fonts or too much padding on smaller screens go unnoticed, they don't get fixed.