Thread:The JoTS/@comment-24737457-20160627093351/@comment-4360159-20160627215107

Sure!

For styles applied to all wiki users: For styles that will only apply for yourself:
 * MediaWiki:Wikia.css modifies the wiki's "wikia/oasis" theme (as you know)
 * MediaWiki:Monobook.css modifies the the wiki's [ monobook theme]
 * MediaWiki:Common.css is applied on both the oasis and monobook themes.
 * Special:MyPage/common.css is your locally applied stylesheet. I recently modified mine (on this wiki) to view this wiki's MediaWiki messages without needing to read white on yellow, etc.
 * There's also a stylesheet that will work across all wikias... except I don't remember its link off the top of my head. It might be w:Special:MyPage/global.css?

Now for customizing your own user page across all wikis... I don't think there is a stylesheet that'll work to that effect.

You may modify your user page locally to include  parameters to the elements you want to modify, but that's the full extent of customization that may be performed there.

On the other hand, if you just want a "global" user profile you can paste onto wikis– you may edit your profile on Community Central and transclude it (with ) onto your other user pages on different wikis.

If you want more details on how to customize (from JS, CSS, or the MediaWiki pages), lemme kno. There's also a few help pages concerning CSS that may be of use.