"Click Here to activate your account" button disabled

Ok, it was an edit to my CSS that I guess caused the problem. Not sure how one would affect the other, but here’s the section of my CSS which, when removed, fixes the issue. I was trying to make the header a little dimmer.

header::before {
    content: "";
    position: absolute;
    top: 0px;
    right: 0px;
    bottom: 0px;
    left: 0px;
    background-color: rgba(0,0,0,0.2);
}