/* ============================================
   Scroll-triggered Animation Classes
   Elements start invisible and animate in
   when .is-visible is added by IntersectionObserver
   ============================================ */

.animate-fade-up,
.animate-fade-in,
.animate-scale-in {
    opacity: 0;
    will-change: opacity, transform;
    transition:
        opacity var(--transition-slower),
        transform var(--transition-slower);
    transition-delay: var(--delay, 0s);
}

.animate-fade-up {
    transform: translateY(32px);
}

.animate-fade-in {
    transform: none;
}

.animate-scale-in {
    transform: scale(0.92);
}

.animate-fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade-in.is-visible {
    opacity: 1;
}

.animate-scale-in.is-visible {
    opacity: 1;
    transform: scale(1);
}

/* ============================================
   Hero staggered entrance
   These play immediately on page load
   ============================================ */
.hero .animate-fade-up {
    animation: heroFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
    animation-delay: var(--delay, 0s);
    opacity: 1;
    transform: none;
    transition: none;
}

@keyframes heroFadeUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Reduced motion: respect user preferences
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .animate-fade-up,
    .animate-fade-in,
    .animate-scale-in {
        opacity: 1;
        transform: none;
        transition: none;
        animation: none;
    }

    .hero .animate-fade-up {
        animation: none;
        opacity: 1;
        transform: none;
    }
}