html {
  height: 100%;
}

body {
  height: 100%;
  background-color: #111;
  color: #999;
  font-family: Arial, Helvetica, sans-serif;
}

.vertical-aligner {
  display: inline-block;
  height: 50%;
}

#content-wrapper {
  vertical-align: middle;
  display: inline-block;
  width: 99%; //Not 100% because we neew room for .vertical-aligner
}

#content {
    width: 400px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.2em;
}

img {
    width: 400px;
    margin-bottom: 50px;
}