Board Thread:Support Requests - Designing Your Wikia/@comment-5558012-20160531194026/@comment-25508186-20160531200305

So, while your import is at the top of wikia.css, it doesn't work since it's all the way down in the file that's actually loaded. You would need to move the import to the top of c:alvin:MediaWiki:Common.css for it to work.
 * Imports need to be placed at the top of a CSS file for them to work.
 * alvin:MediaWiki:Common.css is enabled; it's loaded first.
 * All CSS to be applied is compiled into a single file.