#star-field {
  height: 100vh;
}

.star {
    transform: translateZ(0);
    position: fixed;
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
}

@keyframes twinkle {
    0%   { opacity: 1; }
    50%  { opacity: 0.2; }
    100% { opacity: 1; }
}