Using CoursePress Theme on BuddyPress Site

On one site I'm using CoursePress incl the CoursePress theme, on an other site (something like a compagnion site with a separate domain) I'm using only the CoursePress theme (and not the plugin itself) with BuddyPress. First of all, it's working. I have only a styling issue: all the BuddyPress specific buttons are really really small.