/* ============================================
   ANIMATIONS - Keyframes & Transitions (v2)
   Depends on: variables.css
   ============================================ */

/* ========== KEYFRAMES ========== */

/* Basic fade in */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Fade in with upward movement */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Fade in with scale */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Subtle slide from left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Ken Burns zoom effect */
@keyframes kenBurns {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.08) translate(-1%, -1%); }
}

/* ========== PAGE LOAD ANIMATIONS ========== */
/* Removed fade animations - they added 0.6s perceived delay */
/* Content now appears instantly */

/* ========== SCROLL-TRIGGERED ANIMATIONS ========== */

/* Elements start hidden until they enter viewport */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--animation-duration-medium) ease-out,
                transform var(--animation-duration-medium) ease-out;
}

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

/* Scale variant */
.animate-on-scroll--scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--animation-duration-medium) ease-out,
                transform var(--animation-duration-medium) var(--transition-bounce);
}

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

/* Fade only variant */
.animate-on-scroll--fade {
    opacity: 0;
    transition: opacity var(--animation-duration-long) ease-out;
}

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

/* ========== STAGGERED CARD ANIMATIONS ========== */

.card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--animation-duration-medium) ease-out,
                transform var(--animation-duration-medium) ease-out,
                box-shadow var(--transition-fast);
}

.card.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays for visible cards */
.card.is-visible:nth-child(1) { transition-delay: calc(var(--animation-stagger) * 1); }
.card.is-visible:nth-child(2) { transition-delay: calc(var(--animation-stagger) * 2); }
.card.is-visible:nth-child(3) { transition-delay: calc(var(--animation-stagger) * 3); }
.card.is-visible:nth-child(4) { transition-delay: calc(var(--animation-stagger) * 4); }
.card.is-visible:nth-child(5) { transition-delay: calc(var(--animation-stagger) * 5); }
.card.is-visible:nth-child(6) { transition-delay: calc(var(--animation-stagger) * 6); }
.card.is-visible:nth-child(7) { transition-delay: calc(var(--animation-stagger) * 7); }
.card.is-visible:nth-child(8) { transition-delay: calc(var(--animation-stagger) * 8); }
.card.is-visible:nth-child(9) { transition-delay: calc(var(--animation-stagger) * 9); }
.card.is-visible:nth-child(10) { transition-delay: calc(var(--animation-stagger) * 10); }
.card.is-visible:nth-child(11) { transition-delay: calc(var(--animation-stagger) * 11); }
.card.is-visible:nth-child(12) { transition-delay: calc(var(--animation-stagger) * 12); }

/* ========== HOVER TRANSITIONS ========== */

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
}

.card.is-visible:hover {
    transform: translateY(-6px);
}

/* Image zoom on card hover - refined */
.card__image img,
.card img {
    transition: transform 0.6s var(--ease-out-expo);
    will-change: transform;
}

.card:hover .card__image img,
.card:hover img {
    transform: scale(1.03);
}

/* ========== SLIDESHOW ANIMATIONS (Homepage) ========== */

.slideshow img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    animation: slideshowFade 30s infinite, kenBurns 30s infinite ease-out;
}

@keyframes slideshowFade {
    0%, 13% { opacity: 1; }
    16.66%, 100% { opacity: 0; }
}

/* Stagger each slide */
.slideshow img:nth-child(1) { animation-delay: 0s; }
.slideshow img:nth-child(2) { animation-delay: 5s; }
.slideshow img:nth-child(3) { animation-delay: 10s; }
.slideshow img:nth-child(4) { animation-delay: 15s; }
.slideshow img:nth-child(5) { animation-delay: 20s; }
.slideshow img:nth-child(6) { animation-delay: 25s; }

/* ========== LIGHTBOX ANIMATIONS ========== */

.lightbox {
    transition: opacity var(--transition-fast),
                visibility var(--transition-fast);
}

.lightbox__image {
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.lightbox.active .lightbox__image {
    animation: fadeInScale 0.3s ease-out;
}

/* ========== BUTTON ANIMATIONS ========== */

.play-button {
    transition: opacity var(--transition-fast),
                transform var(--transition-fast);
}

.card:hover .play-button {
    transform: translate(-50%, -50%) scale(1.1);
}

/* ========== LINK ANIMATIONS ========== */

/* Underline draw animation */
.link-animated {
    position: relative;
    text-decoration: none;
}

.link-animated::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width var(--transition-fast);
}

.link-animated:hover::after {
    width: 100%;
}

/* Nav links */
.nav-item > a,
.filters__link {
    transition: color var(--transition-fast),
                border-color var(--transition-fast);
}

/* ========== FILTER ANIMATIONS ========== */

.filters__link {
    transition: color var(--transition-fast),
                border-color var(--transition-fast);
}

.card[data-category] {
    transition: opacity var(--transition-fast),
                transform var(--transition-fast);
}

.card.hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    position: absolute;
}

/* ========== HEADER SCROLL ANIMATION ========== */

.site-header {
    transition: background-color var(--transition-fast),
                backdrop-filter var(--transition-fast),
                box-shadow var(--transition-fast);
}

.site-header.scrolled {
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.theme-light .site-header.scrolled,
.theme-beige .site-header.scrolled,
.theme-ivory .site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

/* ========== LOADING STATE ========== */
/* Removed - was causing perceived slow page loads by hiding content until JS ran */

/* ========== REDUCED MOTION ========== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .slideshow img {
        animation: none;
    }

    .slideshow img:first-child {
        opacity: 1;
    }

    .card,
    .animate-on-scroll,
    .animate-on-scroll--scale,
    .animate-on-scroll--fade {
        opacity: 1;
        transform: none;
    }
}