.google-map-with-top-ribbon-and-three-column-info-footer__iframe { width: 100%; min-height: 400px; }
@media (min-width: 768px) { .google-map-with-top-ribbon-and-three-column-info-footer__iframe { min-height: 600px; } }

/* iframe-normalized */
.google-map-with-top-ribbon-and-three-column-info-footer__iframe {
    width: 100%;
    max-width: 100%;
    height: 400px;
    min-height: 400px;
    display: block;
    border: 0;
    box-sizing: border-box;
    vertical-align: bottom;
}

@media (min-width: 768px) {
    .google-map-with-top-ribbon-and-three-column-info-footer__iframe {
        height: 600px;
        min-height: 600px;
    }
}