.md-content img {
    box-shadow: 0 1px 4px rgba(0,0,0,0.4);
    margin: 10px;
    float: right;
}

.md-content img.no-shadow {
    box-shadow: none;
}

.md-content .aspect-16x9 {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    box-shadow: 0 1px 10px rgba(0,0,0,0.5);
}

.md-content .aspect-16x9 iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
}