body {
  margin: 0;
  padding: 0;
  /* overflow: hidden; */
  width: 100%;
  height: 100%;
  z-index: 0;
  display: flex;
}
#canvas-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}
canvas {
  display: block;
}