How to center vertically without display: table. From http://coding.smashingmagazine.com/2013/08/09/absolute-horizontal-vertical-centering-css/

center-vertically.css

.is-Transformed { 
  width: 50%;
  margin: auto;
  position: absolute;
  top: 50%; left: 50%;
  -webkit-transform: translate(-50%,-50%);
      -ms-transform: translate(-50%,-50%);
          transform: translate(-50%,-50%);
}