BuddyPress.org

Sorry it doesn’t really give me anything to go on, I would suggest trying to get everything back to the original default folders, ensure template pack is correct and that it’s using stylesheets i.e they haven’t been turned off in the dashboard options.

What was suggested before should have worked, that it didn’t suggests other factors involved that I’m not aware of.

If you really want you could go a step further and copy the actual adminbar rulesets and paste them into main style.css at the bottom see if the styles kick in then.