* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html, body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    height: 100%;
    background: black;
  }
  
  canvas {
    display: block;
    margin: 0;
    padding: 0;
    position: absolute;
    top: 0;
    left: 0;
  }