.close {
    float: right;
    font-size: 21px;
    font-weight: bold;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    opacity: .2;
}
.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
    opacity: .5;
}
button.close {
    -webkit-appearance: none;
    padding: 0;
    cursor: pointer;
    background: transparent;
    border: 0;
}