.lightbox-close-cs {

    background-color: transparent;
    border: 0;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    opacity: .5;
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;

}