body {
    width: 100%;
    height: 530px;
    max-width: 721px;
    max-height: 600px;
}

#main-window {
    position: relative;
    font-family: Arial, Helvetica, sans-serif;
    padding-top: 66.25%;
}

#v3dframe {
    background-color: #eaeaea;
    border: none;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 76%;
}

.callout_off {
    display: none;
}

.callout_on {
    position: absolute;
    bottom: 10%;
    height: 10%;
    line-height: 1.42rem;
    color: #475156;
    animation: textin .5s 1;
}

.head {
    font-weight: bold;
    font-size: 1.15em;
}

@media all and (max-width: 990px) {
    body {
        height: 480px;
    }
}

@media all and (max-width: 600px) {
    body {
        height: 430px;
    }
}

@keyframes textin {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}