/* Animation System for UNPACKT */

:root {
    --transition-reveal: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-stagger: 0.1s;
}

/* Base Reveal State */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-reveal);
    will-change: transform, opacity;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered entry for grid items */
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-reveal);
}

.reveal-stagger.active > * {
    opacity: 1;
    transform: translateY(0);
}

/* Dynamic Staggering (applied via JS or inline) */
.reveal-stagger.active > *:nth-child(1) { transition-delay: calc(var(--transition-stagger) * 1); }
.reveal-stagger.active > *:nth-child(2) { transition-delay: calc(var(--transition-stagger) * 2); }
.reveal-stagger.active > *:nth-child(3) { transition-delay: calc(var(--transition-stagger) * 3); }
.reveal-stagger.active > *:nth-child(4) { transition-delay: calc(var(--transition-stagger) * 4); }
.reveal-stagger.active > *:nth-child(5) { transition-delay: calc(var(--transition-stagger) * 5); }
.reveal-stagger.active > *:nth-child(6) { transition-delay: calc(var(--transition-stagger) * 6); }

/* Page Entry Fade */
body {
    background-color: var(--bg-light); /* Ensure consistent background */
}

.page-fade-in {
    animation: fadeInPage 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInPage {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Micro-interaction Enhancements */
.btn, .kit-card, .product-card, .stat-card {
    transition: var(--transition-premium) !important;
}

.btn:active {
    transform: scale(0.95) translateY(-1px);
}

.nav-links a {
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: var(--transition-reveal);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Pulsing indicator for live stats */
@keyframes pulse-live {
    0% { transform: scale(0.95); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.8; }
}

#hp-visitors {
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* --- Cinematic Reveals --- */
.cinematic-fade {
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.cinematic-fade.active {
    opacity: 1;
    transform: translateY(0);
}

.cinematic-fade-delay-1 { transition-delay: 0.2s; }
.cinematic-fade-delay-2 { transition-delay: 0.4s; }
.cinematic-fade-delay-3 { transition-delay: 0.6s; }
.cinematic-fade-delay-4 { transition-delay: 0.8s; }

.cinematic-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.cinematic-scale.active {
    opacity: 1;
    transform: scale(1);
}