/* estrellas */
.stars{position:absolute;left:0;right:0;top:0;height:50%;pointer-events:none;opacity:0;transition:opacity .6s ease}
.star{position:absolute;width:4px;height:4px;background:radial-gradient(circle,#fff 0%, #ffd 60%, transparent 80%);border-radius:50%;box-shadow:0 0 8px rgba(255,255,200,0.6);transform:scale(var(--s,1));filter:drop-shadow(0 0 6px rgba(255,255,255,0.1));animation:star-twinkle 2.8s infinite ease-in-out}
@keyframes star-twinkle{0%{opacity:.2;transform:scale(var(--s,1))}50%{opacity:1;transform:scale(calc(var(--s,1) * 1.3))}100%{opacity:.2;transform:scale(var(--s,1))}}