Board Thread:Support Requests - Designing Your Wikia/@comment-653063-20150223210842/@comment-4902411-20150224131259

Firstly, discard the whole class="modifiedinfo" idea. Stick to the defaults when you can; imitating it might cause unexpected results. Moving on, the solution lies in your question: You need to stylize the th cells. To be more specific, becomes You'd need to specify the element which needs to be stylized. selects the tr element (see above HTML tree), but what you actually need is  (and   for links) to select the th cells.

edit: Just in case if you're wondering, the border issue with the class="modifiedinfo" table is that you are not "collapsing" the borders with. More info here.