CSS selectors for toolbar buttons 'pressed' state

[glitsj16]

Hi, I'm trying to style my navigation toolbar buttons with css. Pretty much finished, but I keep getting (wide) background boxes when buttons are in 'pressed' state. Posted on this in viewtopic.php?f=38&t=3027532, but then I realised this forum might be more appropriate. Here's an example screenshot of my issue:



Is there a reference available where I can find the CSS selectors for toolbar button states so I can experiment to get things sorted? TIA.

[DanRaisch]

Duplicate, locking. Continue in viewtopic.php?p=14733542#p14733542