Board Thread:Support Requests - Getting Technical/@comment-27233105-20160509015216/@comment-1757994-20160509032853

The way site CSS is supposed to work with MediaWiki:
 * 1) MediaWiki:Common.css is loaded
 * 2) MediaWiki: .css is loaded, where = Monobook for Monobook, Wikia for Oasis

The way site CSS works with some wikis at Wikia for Oasis
 * 1) MediaWiki:Wikia.css is loaded, Common.css is ignored

There are 2 solutions: You can actually do both. When Wikia fixes your wiki, the @import statement will be ignored. Until then, it will work.
 * 1) Use an @import statement at the top of Wikia.css to load Common.css
 * 2) Drop a note to Wikia staff at Special:Contact/general to tell them you want to load Common.css in Oasis like it's supposed to load.

New wikis behave correctly automatically. Depending on when your wiki was created, it might not.