.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 120%;
    transform: rotate(-45deg);
}

.star {
    --star-dark-color: #999;
    --star-color: #fff;
    --star-tail-length: 6em;
    --star-tail-height: 2px;
    --star-width: calc(var(--star-tail-length) / 6);
    --fall-delay: 0s;
    --fall-duration: 9s;
    --tail-fade-duration: var(--fall-duration);

    position: absolute;
    left: 0;
    width: var(--star-tail-length);
    height: var(--star-tail-height);
    color: var(--star-color);
    background: linear-gradient(45deg, currentColor, transparent);
    border-radius: 50%;
    opacity: 0.5;
    filter: drop-shadow(0 0 6px currentColor);
    transform: translate3d(104em, 0, 0);
    animation: fall var(--fall-duration) var(--fall-delay) linear infinite, tail-fade var(--tail-fade-duration) var(--fall-delay) ease-out infinite;
}

.light .star {
    color: var(--star-dark-color);
}

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

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

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

@keyframes fall {
    to {
        transform: translate3d(-30em, 0, 0);
    }
}

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

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