I just shouldn't be this hard! I've been working with Builder 4.1 to create a theme. I don't want to get too far from the base Confluence themes, but I'd like to make some changes. Yet, it seems that I have to build CSS from scratch, or figure out where it's stored, copy, paste, edit, etc.

I don't know if this is a Confluence issue or yours, but I'd love to see themes handled like Drupal does. Download a theme someone's done or use one of the included themes, then create a sub-theme, inheriting everything and changing only what needs to be changed. Is it possible to get there?