.case-realsee-hero {
    width: 100%;
    height: 75vh;
    min-height: 520px;
    overflow: hidden;
    background: #0c1521;
}

.case-realsee-hero iframe {
    display: block;
    width: 100%;
    height: calc(100% + 160px);
    margin-top: -80px;
    border: 0;
}

@media (max-width: 760px) {
    .case-realsee-hero {
        min-height: 500px;
    }

    .case-realsee-hero iframe {
        height: calc(100% + 40px);
        margin-top: -20px;
    }
}