.mfp-iframe-holder .mfp-content {
    background: #000 !important;
    position: relative;
}

.mfp-iframe-holder .mfp-close {
    top: 8px !important;
    right: 8px !important;
    width: 44px !important;
    padding-right: 0 !important;
    text-align: center !important;
    color: #fff !important;
    opacity: 1 !important;
    z-index: 10;
}