Button background color

Question

Please
I tried to change my bottom background color but it's not changing and I checked I can't find the problem someone should help me please
Thanks
https://code.sololearn.com/WN6pE1BGzM84/?ref=app

Answer 1

Use this

input{
background-color:red;
}

.mnn {
background-color:blue;
}

Answer 2

Thanks AJ it really work 😌🙏