Board Thread:Support Requests - Getting Technical/@comment-5951078-20130427142622/@comment-5887706-20130427143201

CSS can be found at MediaWiki:Monobook.css MediaWiki:Wikia.css and MediaWiki:Common.css. There are also subpage css that I'm not sure the names for.

For the wiki in particular w:c:poisonapplebooks:MediaWiki:Wikia.css is what you will be looking for.