I just wanted to point out here that I just posted some useful CSS in the Themes forum: https://moodle.org/mod/forum/discuss.php?d=326139
That might also be of use for people here.
And, this might be the best place to discuss wheterh we want that in standard Moodle? There has been a tracker issue (MDL-46092) open about that for over a year, but I have been too busy.