Hi Michael !

Yeah I too believe that being careful and conservative about that sort of stuff it definitely a healthy way to go. And as a matter of fact a fading effect is definitely not a necessity since simply lowering the contrast between states already achieves a very similar end goal.

But all that said, having access to these CSS tweaks is certainly really nice, and without a doubt people will have a blast creating their own (edit : just saw that an editor was already available, awesome).

Best of luck for V4 again !