.image-popup-close {
    position: absolute;
    top: .75rem;
    right: .75rem;
    z-index: 30;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    border: 0;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(11, 15, 25, .72);
    color: #fff;
    box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .35);
}
.image-popup-close:hover,
.image-popup-close:focus {
    background: rgba(11, 15, 25, .9);
    color: #fff;
}
.image-popup-close .bx {
    font-size: 1.25rem;
    line-height: 1;
}