Thread:Citrusellaeditswikis/@comment-188432-20160220002208/@comment-188432-20160222183716

It's simpler to just imagine that  places a specific instruction that overrides the "normal" version of that CSS declaration. So, if you put a declaration in Common.css like... .portable-infobox { color:#fff } ... that will make the font (for the whole infobox) white in both Monobook and Oasis. If you then wanted to override only in Monobook you'd do: .skin-monobook .portable-infobox { color: #000 }

In general, if you care about Monobook, it's a really good idea to just put all your PI code in Common.css and then just make exceptions in Monobook as needed. The cool thing about  is that you don't have to leave Common.css to use  . So it lets you keep all your PI code in one place.