Nope, I’m just not very familiar with css. The last one works, thanks!
The first one indeed removes the border for normal states as well.
I’m not overly fond of copying settings though. Like for example when the parent theme changes border: 1px blah to border: 2px. Then the border would shrink when “active” as it copied the old border 1:px setting.
But that’s a nitpick. I was hoping setting something to empty would work 
Thanks again!