html, body {
  margin: 0;
  background: white;
  overflow: hidden;
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#container {
  padding: 20px;
}

#message {
  width: 40em;
  height: 20em;
}