Vertical align without flexbox

v-align-legacy.scss

html, body { height: 100%; }

.container {
  position: relative;
  text-align: center;
  display: block;
  height: 100%;
  
  &::before,
  .box {
    display: inline-block;
    vertical-align: middle;
  }

  &::before {
    content: '';
    width: 0;
    height: 100%;
  }
}