body {
  min-height: 100vh;
  background-image: url(https://unsplash.it/1980/1680/?random);
  background-size: cover;
  overflow:hidden;
}

#canvas-overlay {
  position: relative;
  z-index: 98;
  opacity: 0.85;
}

#canvas-lines {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 99;
  opacity: 0.05;
}