#mouse-stars {
  position: fixed;
  inset: 0;
  z-index: 1000;
  overflow: hidden;
  pointer-events: none;
  opacity: 0;
  transition: opacity 150ms ease-out;
}

#mouse-stars.is-active {
  opacity: 1;
}

#mouse-stars .mouse-star {
  position: absolute;
  top: 0;
  left: 0;
  line-height: 1;
  user-select: none;
  will-change: transform;
}

#mouse-stars .mouse-star:nth-child(1) { color: blue; font-size: 12pt; }
#mouse-stars .mouse-star:nth-child(2) { color: red; font-size: 20pt; }
#mouse-stars .mouse-star:nth-child(3) { color: gold; font-size: 16pt; }
#mouse-stars .mouse-star:nth-child(4) { color: lime; font-size: 14pt; }

@media (hover: none), (pointer: coarse), (prefers-reduced-motion: reduce) {
  #mouse-stars { display: none; }
}