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

body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1a1a1a;
}

#container {
  visibility: hidden;
  position: relative;
  border: 10px solid #ddd;
  border-radius: 10px;
  font-size: 50px;
  color: black;
  font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  font-weight: bold;
}

#message {
  position: absolute;
  height: 70px;
  line-height: 70px;
  width: 100%;
  text-align: center;
  background: rgba(255, 255, 255, 0.6);
}

canvas {
  display: block;
}