* {
  font-family: Arial, Helvetica, sans-serif;
}

html, body {
  background-color: #000;
  color: whitesmoke;
}

.vertical-center {
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}