Vertical Centering

Fancy CSS trick to vertically center an item inside a container.

by Simon Harte

HTML

<div class="wrapper">
  <div class="item">0</div>
</div>

CSS

html,
body {
  height: 100%;
  margin: 0;
}

.wrapper {
  width: 50%;
  height: 50%;
  background: beige;
  letter-spacing: -1em;
  text-align: center;
}

.wrapper::before {
  content: '';
  display: inline-block;
  height: 100%;
  vertical-align: middle;
}

.item {
  display: inline-block;
  letter-spacing: normal;
  vertical-align: middle;
}