/* Site-wide space backdrop: twinkling stars */
.space-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}
.space-star {
    position: absolute;
    border-radius: 50%;
    background: #fff;
    opacity: 0.2;
    animation: space-twinkle var(--d, 4s) ease-in-out var(--delay, 0s) infinite;
}
@keyframes space-twinkle {
    0%, 100% { opacity: 0.15; transform: scale(1); }
    50%      { opacity: 0.85; transform: scale(1.35); }
}
@media (prefers-reduced-motion: reduce) {
    .space-star { animation: none; }
}