Will work on it. While I am at it…
Extension:Theme allows to change the mediawiki skin.
So at the same time, we need to install another skin(s). Here is a link to a post where I post links to other mediawiki skins:
There might be other skins too to be found on search engines too. Needs to be Freedom Software.
Skins we have currently installed are listed here:
Having a different skin per page may provide sufficient visual difference for Whonix vs Kicksecure.
Extension:Theme however does not look like an extension that provides multiple MediaWiki:Common.css. Customization may or may not be limited and/or difficult.
Is that what you suggest?