canvas {
  background-color: #000;
  height: 100vh;
  width: 100vw;
}

body, html {
  height: 100vh;
  margin: 0;
}

.instructions {
  background-color: #000;
  color: #BBB;
  font-size: 1.5rem;
  height: 2rem;
  margin: 0;
  text-align: center;
}