On Mon, Feb 9, 2015 at 8:56 AM, Erik Moeller <erik@wikimedia.org> wrote:
- Add introduction: "This page describes the use of the mediawiki.ui styles available as LESS files in MediaWiki core. Longer term, the goal is to convert controls over to the use of <a href="https://www.mediawiki.org/wiki/OOjs_UI">OOjs UI</a>, which is a library available in PHP and JavaScript, and which supplies multiple themes, including a MediaWiki theme consistent with these styles. A living style guide based on OOjs UI can be found <a href="http://living-style-guide.wmflabs.org/wiki/Main_Page">here</a>." 

I was about to suggest the same thing.

Ironically, the "mobile" section is currently not mobile-friendly. Is it still relevant?

Yes, this is still the primary style guide used for mobile development.

I created a Phabricator task for the various style inconsistencies between mediawiki.ui and OOjs UI: https://phabricator.wikimedia.org/T88449. It looks like Prateek and May are already working on it :) Thanks guys!

Kaldari