.dust-container {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 30%;
  height: 100%;
  pointer-events: none;
}

.dust-mote {
  position: absolute;
  background: white;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  opacity: 1;
  filter: blur(1px);
  animation: float linear infinite;
}

.dust-mote:nth-child(1) { left: 20%; animation-duration: 17s; animation-delay: -2s; }
.dust-mote:nth-child(2) { left: 40%; animation-duration: 23s; animation-delay: -7s; width: 3px; }
.dust-mote:nth-child(3) { left: 60%; animation-duration: 19s; animation-delay: -12s; }
.dust-mote:nth-child(4) { left: 80%; animation-duration: 25s; animation-delay: -5s; width: 1px; }
.dust-mote:nth-child(5) { left: 35%; animation-duration: 20s; animation-delay: -1s; }
.dust-mote:nth-child(6) { left: 10%; animation-duration: 17s; animation-delay: -8s; }
.dust-mote:nth-child(7) { left: 45%; animation-duration: 23s; animation-delay: -6s; width: 3px; }
.dust-mote:nth-child(8) { left: 70%; animation-duration: 19s; animation-delay: -10s; }
.dust-mote:nth-child(9) { left: 30%; animation-duration: 25s; animation-delay: -4s; width: 1px; }
.dust-mote:nth-child(10) { left: 50%; animation-duration: 20s; animation-delay: -3s; }

@keyframes float {
  0% {
    transform: translateY(0) translateX(0);
    opacity: 0;
  }
  15% {
    transform: translateY(5vh) translateX(0);
    opacity: 1;
  }
  50% {
    transform: translateY(30vh) translateX(20px);
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) translateX(-20px);
    opacity: 0;
  }
}