Board Thread:Support Requests - Designing Your Wiki/@comment-25044414-20130211020755/@comment-3335785-20130211022605

CSS is a little tricky if you son't know what you're doing. Examples of modifications through CSS might include terraria or deadspace. To style it, the CSS should be located in MediaWiki:Wikia.css (the corresponding page on your wiki). The styling for both examples can be found at that same page on the respective wiki.

Hope this helps :)