/* ═══════════════════════════════════════════
   ANIMATIONS.CSS — Scroll-Triggered Reveals
   Apple-inspired motion design system
   ═══════════════════════════════════════════ */

/* Smooth Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* ─── Base Reveal Classes ─── */
.reveal {
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

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

/* ─── Reveal Variants ─── */
.reveal-fade {
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity;
}

.reveal-fade.active {
    opacity: 1;
}

.reveal-left {
    opacity: 0;
    transform: translateX(-80px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(80px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

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

/* ─── Stagger Delays ─── */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }
.delay-7 { transition-delay: 0.7s; }
.delay-8 { transition-delay: 0.8s; }

/* ─── Keyframe Animations ─── */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.85);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

@keyframes lineGrow {
    from { width: 0; }
    to   { width: 60px; }
}

@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

/* ─── Hero Text Animation ─── */
.hero-line {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-line:nth-child(1) { animation-delay: 0.2s; }
.hero-line:nth-child(2) { animation-delay: 0.4s; }
.hero-line:nth-child(3) { animation-delay: 0.6s; }

/* Hero subtitle / CTA */
.hero-subtitle {
    opacity: 0;
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
}

.hero-cta {
    opacity: 0;
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.0s forwards;
}

/* ─── Decorative Line Animation ─── */
.accent-line {
    display: block;
    width: 0;
    height: 2px;
    background: var(--gold, #c9a96e);
    margin: 16px auto 0;
    animation: lineGrow 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.reveal .accent-line {
    animation: none;
    width: 0;
}

.reveal.active .accent-line {
    animation: lineGrow 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
}

/* ─── Parallax Layers ─── */
.parallax-slow {
    will-change: transform;
}

.parallax-fast {
    will-change: transform;
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-fade,
    .reveal-left,
    .reveal-right,
    .reveal-scale {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .hero-line,
    .hero-subtitle,
    .hero-cta {
        opacity: 1;
        animation: none;
    }

    .accent-line,
    .reveal.active .accent-line {
        width: 60px;
        animation: none;
    }

    html {
        scroll-behavior: auto;
    }
}