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

html, body {
  margin: 0;
  padding: 0;
  background: #000;
  overflow: hidden;
}

.shader{
  position: absolute;
  width: 100%;
  height: 100%;
  top:0;
  left:0;
}

canvas {
  position: absolute;
  width: 100%;
  height: 100%;
}