.sky {
  position: relative;
  width: 100vw;
  height: 100vh;
}

.stars{
  transform: rotate(-45deg);
}

.star {
  --tail-height: 2px;
  --star-color: #ffffff;
  position: absolute;
  top: var(--top-offset);
  left: 100%;
  width: var(--tail-length);
  height: var(--tail-height);
  background: linear-gradient(45deg, var(--star-color), transparent);
  border-radius: 50%;
  filter: drop-shadow(0 0 6px var(--star-color));
  animation: fall linear infinite, tail-fade ease-out infinite;
  animation-duration: var(--fall-duration), var(--fall-duration);
  animation-delay: var(--fall-delay), var(--fall-delay);
}

.star::before,
.star::after {
  content: '';
  position: absolute;
  top: 0;
  left: calc(var(--tail-height) / -2);
  width: var(--tail-height);
  height: 100%;
  background: linear-gradient(45deg, transparent, var(--star-color), transparent);
  border-radius: inherit;
  animation: blink 2s linear infinite;
}

.star::before {
  transform: rotate(45deg);
}

.star::after {
  transform: rotate(-45deg);
}

@keyframes fall {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-150vw);
  }
}

@keyframes tail-fade {
  0%, 50% {
    width: var(--tail-length);
    opacity: 1;
  }
  70%, 80% {
    width: 0;
    opacity: 0.4;
  }
  100% {
    width: 0;
    opacity: 0;
  }
}

@keyframes blink {
  50% {
    opacity: 0.6;
  }
}