html {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  background: #000;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  margin: 0;
}

canvas {
  min-width:100vw;
  min-height:100vh;
  max-width: 100vw;
  max-height: 100vh;
}