Juliusz,
What's your current thought on the following RFC:
https://www.mediawiki.org/wiki/Requests_for_comment/Scoping_site_CSS
It came up a little bit ago when Sumana and I were discussing open RFC's.
thanks
--tomasz
Last time Sumana and I talked, I said that it was pretty low on my current priority list given all the other responsibilities I have. This is still the case.