body {
  background: #333333;
  color: #ffffff;
  font-family: sans-serif;
}

#canvas {
  cursor: pointer;
}

#guide {
  display: grid;
  pointer-events: none;
  position: absolute;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

#guide div {
  border: 1px solid rgba(0, 0, 0, 0.1);
}