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

html, body { 
  width: 100%;
  height: 100%;
  overflow: hidden;
}


canvas {
    display: block;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-color: white; 
}