Board Thread:Support Requests - Getting Started/@comment-24141134-20131107062432/@comment-366087-20131107064940

Type MediaWiki:Wikia.css (case important, sorta) after "wiki.com/" in the url of your wiki page and go to it. Either the page already exists (if someone already added code to it), or you will be taken to a page which "needs content". In which case, click the "Create" button which is in place of the "Edit".

The second situation happens because the page does not exist until someone makes it.