html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  height: 100%;
  background-color: #ffffff;
}

h1 {
  text-align: center;
  font-family:'Courier New', Courier, monospace
}

img {
  width: 90px;
  display: block;
  margin: auto;
}

.outer {
  display: table;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
}

.middle {
  display: table-cell;
  vertical-align: middle;
}

.inner {
  margin-left: auto;
  margin-right: auto;
}