body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background-attachment: fixed;
  background-color: black;
}

canvas {
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  width: '100%';
  max-width: 100%;
  max-height: 100%;
   box-shadow:
      0 1px 1px hsl(0deg 0% 0% / 0.075),
      0 2px 2px hsl(0deg 0% 0% / 0.075),
      0 4px 4px hsl(0deg 0% 0% / 0.075),
      0 8px 8px hsl(0deg 0% 0% / 0.075),
      0 16px 16px hsl(0deg 0% 0% / 0.075);
}