.mfp-iframe-holder .mfp-content {
    width: 960px;
}

.mfp-extracontent-holder .mfp-content {
    margin-top: -100px;
}

.mfp-extracontent-holder .mfp-close {
    top: calc(100% + 100px)
}

.mfp-extracontent {
    position: absolute;
    top: 100%;
    height: 100px;
    display: block;
    width: 100%;
    background-color: #fff;
    padding: 15px;
    font-size: 18px;
    color: #000;
    line-height: 1.3;
}

@media screen and (max-width: 475px) {
    .mfp-extracontent {
        font-size: 15px;
    }
}