* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0a0f;
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

body.playing #canvas {
  cursor: default;
}