Board Thread:Support Requests - Designing Your Wikia/@comment-4347751-20151228022545/@comment-17725354-20151228024533

I've put your code in my personal CSS on my test wiki and it appears to be working/loading just fine.

Have you tried clearing your cache/doing a hard refresh? (Help:Bypass_your_cache for browser specifics.)

If you have cleared your cache, can you see the CSS loaded in Inspect Element and being overridden or is it not loading entirely? If it's being overridden, add  at the end of your property values.