canvas.snow {
  padding: 0;
  margin: 0;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  width: auto;
  height: auto;
  pointer-events: none;
  position: fixed;
  opacity: 0;
}

canvas.snow.active {
    transition: opacity 3s;
    opacity: 1;
}

canvas.snow.inactive {
    opacity: 0;
}