/* ============================================
   HEIRLOOM GALLERY - Photo Gallery Styles
   Matches the Heirloom Archive design system
   ============================================ */

/* ============================================
   GALLERY GRID
   ============================================ */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm, 1rem);
    padding: var(--space-md, 1.5rem) 0;
}

@media (min-width: 480px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-md, 1.5rem);
    }
}

@media (min-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (min-width: 1400px) {
    .gallery-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* ============================================
   THUMBNAIL ITEM
   ============================================ */
.gallery-thumb {
    display: block;
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-parchment, #ede6db);
    border: 1px solid rgba(26, 47, 74, 0.08);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.gallery-thumb::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(15, 29, 45, 0.5) 0%,
        transparent 50%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.gallery-thumb:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(26, 47, 74, 0.15);
}

.gallery-thumb:hover::before {
    opacity: 1;
}

.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: sepia(8%) saturate(95%);
}

.gallery-thumb:hover img {
    transform: scale(1.08);
    filter: sepia(0%) saturate(100%);
}

/* Thumbnail number overlay */
.gallery-thumb::after {
    content: attr(data-index);
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(26, 47, 74, 0.6);
    padding: 2px 8px;
    border-radius: 2px;
    opacity: 0;
    transform: translateY(4px);
    transition: all 0.3s ease;
    z-index: 2;
}

.gallery-thumb:hover::after {
    opacity: 1;
    transform: translateY(0);
}

/* Placeholder for lazy loading */
.gallery-thumb img[data-src] {
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gallery-thumb img.is-loaded,
.gallery-thumb img:not([data-src]) {
    opacity: 1;
}

/* ============================================
   LIGHTBOX
   ============================================ */
.heirloom-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.heirloom-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

/* Overlay */
.lightbox-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 29, 45, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Container */
.lightbox-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 16px 80px;
}

@media (min-width: 768px) {
    .lightbox-container {
        padding: 60px 80px 100px;
    }
}

/* Close button */
.lightbox-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid rgba(250, 248, 245, 0.2);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.lightbox-close svg {
    width: 20px;
    height: 20px;
    color: var(--color-cream, #faf8f5);
}

.lightbox-close:hover {
    background: rgba(250, 248, 245, 0.1);
    border-color: rgba(250, 248, 245, 0.4);
}

.lightbox-close:focus {
    outline: 2px solid var(--color-brass, #b8956e);
    outline-offset: 2px;
}

/* Navigation buttons */
.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(250, 248, 245, 0.05);
    border: 1px solid rgba(250, 248, 245, 0.15);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.lightbox-nav svg {
    width: 24px;
    height: 24px;
    color: var(--color-cream, #faf8f5);
}

.lightbox-prev {
    left: 16px;
}

.lightbox-next {
    right: 16px;
}

@media (min-width: 768px) {
    .lightbox-nav {
        width: 56px;
        height: 56px;
    }

    .lightbox-prev {
        left: 24px;
    }

    .lightbox-next {
        right: 24px;
    }
}

.lightbox-nav:hover:not(.is-disabled) {
    background: rgba(250, 248, 245, 0.15);
    border-color: rgba(250, 248, 245, 0.3);
}

.lightbox-nav:focus {
    outline: 2px solid var(--color-brass, #b8956e);
    outline-offset: 2px;
}

.lightbox-nav.is-disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Image content */
.lightbox-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: 100%;
}

.lightbox-image-wrapper {
    position: relative;
    max-width: 100%;
    max-height: 100%;
}

.lightbox-image {
    max-width: 100%;
    max-height: calc(100vh - 180px);
    object-fit: contain;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.3s ease, transform 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.lightbox-image.is-loaded {
    opacity: 1;
    transform: scale(1);
}

/* Loader */
.lightbox-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.lightbox-loader.is-loading {
    opacity: 1;
    visibility: visible;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(184, 149, 110, 0.2);
    border-top-color: var(--color-brass, #b8956e);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Footer */
.lightbox-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: linear-gradient(transparent, rgba(15, 29, 45, 0.8));
}

.lightbox-caption {
    font-family: var(--font-body, 'Source Serif 4', Georgia, serif);
    font-size: 0.9375rem;
    color: rgba(250, 248, 245, 0.8);
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.lightbox-counter {
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 1rem;
    color: var(--color-brass, #b8956e);
    letter-spacing: 0.1em;
}

.counter-separator {
    margin: 0 4px;
    opacity: 0.5;
}

/* ============================================
   GALLERY PAGE HEADER
   ============================================ */
.gallery-header {
    text-align: center;
    padding: var(--space-xl, 4rem) var(--space-md, 1.5rem);
    background: linear-gradient(
        180deg,
        var(--color-cream, #faf8f5) 0%,
        var(--color-cream-warm, #f5f0e8) 100%
    );
}

.gallery-pretitle {
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-brass, #b8956e);
    margin-bottom: var(--space-xs, 0.5rem);
}

.gallery-title {
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 400;
    color: var(--color-navy, #1a2f4a);
    margin-bottom: var(--space-sm, 1rem);
}

.gallery-description {
    font-family: var(--font-body, 'Source Serif 4', Georgia, serif);
    font-size: 1.0625rem;
    color: var(--color-text-light, #6b635c);
    max-width: 600px;
    margin: 0 auto var(--space-md, 1.5rem);
}

.gallery-meta {
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 0.9375rem;
    color: var(--color-text-muted, #8f867e);
}

.gallery-meta span {
    display: inline-block;
    margin: 0 var(--space-xs, 0.5rem);
}

.gallery-meta span:not(:last-child)::after {
    content: '•';
    margin-left: var(--space-sm, 1rem);
    opacity: 0.4;
}

/* ============================================
   GALLERY NAVIGATION
   ============================================ */
.gallery-nav {
    display: flex;
    justify-content: center;
    gap: var(--space-sm, 1rem);
    padding: var(--space-md, 1.5rem);
    border-bottom: 1px solid rgba(26, 47, 74, 0.08);
}

.gallery-nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs, 0.5rem);
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-light, #6b635c);
    padding: var(--space-xs, 0.5rem) var(--space-sm, 1rem);
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.gallery-nav-link:hover {
    color: var(--color-navy, #1a2f4a);
    border-color: var(--color-brass, #b8956e);
}

.gallery-nav-link svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   SUB-ALBUM CARDS
   ============================================ */
.album-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md, 1.5rem);
    padding: var(--space-xl, 4rem) var(--space-md, 1.5rem);
    max-width: 1400px;
    margin: 0 auto;
}

.album-card {
    position: relative;
    display: block;
    background: var(--color-cream-warm, #f5f0e8);
    border: 1px solid rgba(26, 47, 74, 0.08);
    overflow: hidden;
    transition: all 0.4s ease;
}

.album-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(26, 47, 74, 0.12);
}

.album-card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.album-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    filter: sepia(10%) saturate(90%);
}

.album-card:hover .album-card-image img {
    transform: scale(1.05);
    filter: sepia(0%) saturate(100%);
}

.album-card-content {
    padding: var(--space-md, 1.5rem);
}

.album-card-title {
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-navy, #1a2f4a);
    margin-bottom: var(--space-xs, 0.5rem);
}

.album-card-meta {
    font-size: 0.875rem;
    color: var(--color-text-muted, #8f867e);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .heirloom-lightbox,
    .gallery-nav {
        display: none;
    }

    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }

    .gallery-thumb {
        break-inside: avoid;
    }

    .gallery-thumb::before,
    .gallery-thumb::after {
        display: none;
    }
}