IMO, you're giving way too much control to the end user with regard to configuring the layout and minute details of their page. Giving a content author control over the padding, background, font choices, etc, is a recipe for them creating super specific pages that look bad and have no consistency.
Typically, I'll limit clients to specific widgets and layouts and train them on how and when to use these elements for maximum effect. That's the only way to maintain design integrity. I don't let them pick fonts, font sizes, colors, etc. Authors are given a list of choices for the fonts, and these choices correspond to the font hierarchy specified early on, and they have to build pages within those bounds.
The idea is you want to give them just enough control to author the content they need (without weird hacks) and nothing more.
Typically, I'll limit clients to specific widgets and layouts and train them on how and when to use these elements for maximum effect. That's the only way to maintain design integrity. I don't let them pick fonts, font sizes, colors, etc. Authors are given a list of choices for the fonts, and these choices correspond to the font hierarchy specified early on, and they have to build pages within those bounds.
The idea is you want to give them just enough control to author the content they need (without weird hacks) and nothing more.