/* For tablet and desktop view (over 768px of the width of the screen) */
.iframe-vmc {
    height: 700px;
}

/* For resolutions between 593px and 765px of the width of the screen */
@media screen and (max-width:765px) {
    .iframe-vmc {
        height: 1180px;
    }
}

/* For resolutions below of 592px of the width of the screen */
@media screen and (max-width:592px) {
    .iframe-vmc {
        height: 1515px;
    }
}