canvas {
  width: 100vw;
  height: 100dvh;
  display: block;
  position: fixed;
  inset: 0;
  z-index: 0;
}

/* The main heading of the website in the centre of the animation */
.overlay-heading {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 100vh;
}