Style Ionic 2 app?

There’s a lot of frameworks for responsive out there, but we don’t care because we develop with Ionic for mobile (well most of us do, i’m using the transpiled code as web app :stuck_out_tongue: ) the idea is avoid importing something like bootstrap or foundation, but some things are lacking or they are just not jet done or documented.

As an example, SemanthicUI, bootstrap and Foundation exposes classes like .error that is used to display a div as an error message in light red.

Will Ionic support this little things in the future? or they exists but not jet documented?