Over 4 years ago, Alan Burke noticed that Drupal didn't have any CSS coding standards. He asked the documentation team lead at the time, Addison Berry, for advice and she suggested that if they wrote the first draft of the CSS coding standards, that would get the ball rolling on discussing them. The goal being to write, iterate and come to consensus on Drupal’s coding standards. See http://groups.drupal.org/node/14421 for the original discussion.
Unfortunately, its 4 years later and the CSS coding standards are still marked “Draft”. http://drupal.org/node/302199
Fortunately, there are now some great external resources for CSS coding standards. I've taken Drupal’s former draft and combined it with other resources, added a sprinkling of new Drupal 8 features and come up with a new expanded DRAFT version of our CSS standards:
So that we can actually move from DRAFT to consensus, I'd like to timebox this discussion to 2 weeks today. All comments should be in by January 30, 2013! Hopefully, by then we'll have reached consensus on most items. Any item that we haven't reached consensus on should be removed from the standard.