The focus rectangle should only be used for keyboard focus, not when you click a tab:
Compare with the OOUI functionality:
https://doc.wikimedia.org/oojs-ui/master/demos/?page=widgets&theme=wikimediaui&direction=ltr&platform=desktop#demo-section-tabs
Also the inactive colour is lighter than in OOUI, this should be resolved in one repo or the other.
There should also a be dark blue "pressed" state when the mouse is down.
Acceptance Criteria:
- Focus rectangle is only visible on keyboard focus, not on click
- Inactive tab color matches OOUI value
- Dark blue "pressed" state visible while mouse is down