.close {
    float: right;
    font-size: 21px;
    font-weight: bold;
    line-height: 1;
    color: #000000;
    text-shadow: 0 0 0 transparent;
    opacity: 0.2;
    filter: alpha(opacity=20);
}

.close:hover,
.close:focus {
    color: #000000;
    text-decoration: none;
    cursor: pointer;
    opacity: 0.5;
    filter: alpha(opacity=50);
}

button.close {
    padding: 0;
    cursor: pointer;
    background: transparent;
    border: 0;
    -webkit-appearance: none;
}