.mapwrapper {
    position: relative;
    height: 0;
    overflow: hidden;
    margin: 0 0 -80px 0;
}

.mapwrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

@media all and (max-width: 600px) {
    .mapwrapper { padding-bottom: 120%; }
}

@media all and (min-width: 601px) and (max-width: 940px) {
    .mapwrapper { padding-bottom: 45%; }
}

@media all and (max-width: 940px) {
    .mapwrapper { margin: 0 0 -40px 0; }
}

@media all and (min-width: 941px) {
    .mapwrapper {
        padding-bottom: 30%;
        margin: 0 0 -80px 0;
    }
}