feature conditional styling

The conditional styling is great.
Have had to use it for a video player (Vidstack) where pico threw the look all over the place.
Except you have to add styling to everything except maybe 1 class.

What about a class="!.pico "
Eg a negative pico
So you could use pico for everything except 1 that is not working well with pico?
would be a lot more useful I think 
cheers
Mark
