* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  height: 100vh;
  overflow: hidden;
  background: #606060;
}
canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw !important;
  height: 100vh !important;
}