Vertical Tabs CSS

I've used this theme on a recent site for a friend of mine, but when I installed vertical tabs I found that it looked pretty terrible with the white text used by Atlantis. So I added some CSS (trying to match the existing CSS/colors as closely as possible) to make Vertical Tabs look better. Vertical tabs in D6 has identical markup to the Drupal 7 core version, so including this might also be a jump-start on changes required for a Drupal 7 version of this theme. I've included before and after screenshots, and the patch is against the 1.2 version.