Can we add detail to our CSS standards

[ASH-Bryan]

I think it would be good to codify things like:

• When is it okay to modify an existing base class?
• How should a class be packaged - in other words, how complex should they be versus how reusable?
• What's our stance on smaller, more atomic classes?

Basically can we look through past CSS code reviews and try to coalesce a lot of the mistakes those with less CSS experience (like me) make into more concrete guidelines?

[ASH-Bryan]

• What is our CSS philosophy? In other words, is there a set of principles a new person can follow to produce correctly integrated CSS?
• When should we push back on UX versus writing CSS to accomplish what is in the mockups?
• What's the easiest way to find if existing styles will meet my requirement?
• Maybe we could also have something like an FAQ with examples:
  • I have an existing element and I need to add a horizontal line under it. How do I do that?
  • There's a base class I can use for this, but I need to remove the bottom padding from it. What's the best way to do that?