Board Thread:Support Requests - Designing Your Wiki/@comment-8190200-20130731081509/@comment-1330470-20130731083156

Teacup, there's JS pages, and there's CSS pages. There are three of each: Wikia.css/js, Monobook.css/js, Common.css/js. "Wikia" applies to the Wikia skin, "Monobook" applies to Monobook, and "Common" is "common" to both skins... theoretically, at least.

Don't stress out, just do exactly as the guide says. If it names a Mediawiki page, just put it in the Mediawiki page, and don't stress out too hard about possible contradictions...