hi, I'm using window_control_force_linux_system_style.css and works fine to get the theme styles of the system, but the ':hover' is working bad, the ':hover' effect keep the image or background color even if I'm out of that buttons. with other system themes the effect is more noticeable.
It's all good my dude. There's just so many small differences between just linux versions that I wouldn't have been suprised if the style didn't work in one of them.