Board Thread:Support Requests - Designing Your Wiki/@comment-27612891-20200205015054/@comment-9605025-20200205015916

I am guessing it is because the default CSS uses ".tabberlive .tabbertab". Try using ".custom-tabber-1 .tabberlive .tabbertab". FYI, in general, you should try to get your selectors so that you don't need to use "!important".