html,
body {
    height: 100%;
    margin: 0;
    overflow: hidden;
}

.container-fluid {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.row {
    flex: 1;
}
.col-md-8, .col-md-4 {
    padding-right: 0;
    padding-left: 0;
}

.iframe-container iframe {
    height: 100%;
}

.d-flex-center {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    overflow-y: auto;
}
@media screen and (max-width: 768px) {
    .d-flex-center {
        justify-content: start;
        margin-top: 30px;
        height: 40%;
    }
    .iframe-container {
        height: 50%;
    }
}