Waterfall 12 May
#71
Why can't you import background.css or include the block in login.css?

We made a few other tweaks as well and can finally see what we're typing in again. I don't know if that what you were going for but it works as a temporary solution.
Shade 12 May
#72
Whisper's custom login screen is more than just CSS. It requires HTML edits which cannot be applied anymore starting from MyBB 1.8.16 (or around that version). Core edits are necessary, but they are too complicated and I don't have enough spare time to dig in deep for a permanent solution.