body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  cursor: url("images/cursor.png") 16 16, auto;
}

.background {
  position: fixed;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  z-index: 1;
}

.overlay {
  position: fixed;
  bottom: 0;
  width: 100%;
  z-index: 2;
  pointer-events: none; /* important */
}

.overlay img {
  width: 100%;
  height: auto;
  object-fit: cover;
}