Aspect-locked containers

by aaron_senecal

HTML

<div style="width: 20%;" class="aspect-lock aspect-9_16">
    <div>
      <img src="http://limchinwoon.files.wordpress.com/2013/02/mountain_7.jpg"
      />
  </div>
</div>
<div style="width: 20%;" class="aspect-lock aspect-10_16">
  <div>
      <img src="http://limchinwoon.files.wordpress.com/2013/02/mountain_7.jpg"
      />
  </div>
</div>
<div style="width: 20%;" class="aspect-lock aspect-4_3">
   <div>
      <img src="http://limchinwoon.files.wordpress.com/2013/02/mountain_7.jpg"
      />
  </div>
</div>
<div style="width: 20%;" class="aspect-lock aspect-1_1">
   <div>
      <img src="http://limchinwoon.files.wordpress.com/2013/02/mountain_7.jpg"
      />
  </div>
</div>

CSS

div.aspect-lock {
    height: auto;
    background: #333;
    float: left;
    margin: 2%;
    position: relative;
    overflow: hidden;
}
div.aspect-lock div {
    position: absolute;
    width: 200%;
    left: -50%;
    height: 200%;
    top: 0;
}
div.aspect-lock img {
    min-width: 50%;
    min-height: 50%;
    max-width: 100%;
    max-height: 100%;
    display: block;
    margin: auto;
}
div.aspect-lock:after {
    content: '';
    display: block;
    position: relative;
}
div.aspect-4_3:after {
    padding-top: 75%;
}
div.aspect-9_16:after {
    padding-top: 56.25%;
}
div.aspect-10_16:after {
    padding-top: 62.5%;
}
div.aspect-1_1:after {
    padding-top: 100%;
}