.stars {
    position: fixed;
    width: 100vw;
    height: 100vh;
    z-index: -10;
    opacity: 50%;
}

.star {
    position: fixed;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 8px white;
    animation: twinkle 1.5s infinite alternate, moveStar 8s infinite linear;
}

@keyframes twinkle {
    0% {
        opacity: 0.8;
    }
    50% {
        opacity: 0.4;
    }
    100% {
        opacity: 0.8;
    }
}

@keyframes moveStar {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
        opacity: 0;
    }
}