/* Aspect Ratio */

.sixteen-nine-container { width: 100%; padding-top: 56.25%; position: relative; overflow: hidden; }

.sixteen-nine-container > img, 
.sixteen-nine-container > iframe,
.sixteen-nine-container > div { width: 100%; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.sixteen-nine-container > iframe { height: 100%; } /* Iframes need a height specified */