body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: hsl(207, 95%, 4%);
}

canvas {
  max-width: 100%;
  max-height: 100%;
  box-shadow: 0px 0px 20px #00000077;
}