fabiosistemi if we want can we force the search field to be lowercase with css?
Yes, but I don't see any point in that. Just because it always displays in lowercase, doesn't mean the input is lowercase. I still need to fix the bug related to uppercase input. Besides, it's annoying for the user when they input in UPPER and it still displays in lower.
It should really just work like this: User can input lower, UPPER or MiXeD, but the results will always display case-insensitive.