/* ==========================================================================
   Premium Gallery CSS Stylesheet - Huma Kopi Art & Gallery
   ========================================================================== */

/* 1. Global Reset & Variables */
:root {
    --bg-gallery: #0a0808;
    --bg-panel: #13100f;
    --bg-panel-hover: #1b1716;
    
    --text-gold: #d4af37;
    --text-gold-light: #f5df9e;
    --text-primary: #f5f4f0;
    --text-secondary: #c7c5be;
    --text-muted: #7c7974;
    
    --border-gold: rgba(212, 175, 55, 0.08);
    --border-gold-hover: rgba(212, 175, 55, 0.35);
    --border-soft: rgba(255, 255, 255, 0.05);
    
    --transition-gallery: all 0.5s cubic-bezier(0.19, 1, 0.22, 1);
    --transition-fast: all 0.25s ease;
    
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Plus Jakarta Sans', sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-gallery);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-gallery);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Custom Luxury Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-gallery);
}
::-webkit-scrollbar-thumb {
    background: #25201e;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-gold);
}

/* Containers */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.gold-text { color: var(--text-gold); }

.gold-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 30px;
    background: rgba(212, 175, 55, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.15);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-gold);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.gold-sub-label {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2.5px;
    color: var(--text-gold);
    text-transform: uppercase;
    display: block;
    margin-bottom: 12px;
}

/* 2. Gallery Header Navigation */
.gallery-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-soft);
    background: rgba(10, 8, 8, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: var(--transition-gallery);
}

.gallery-header.scrolled {
    background: rgba(10, 8, 8, 0.95);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    border-bottom-color: var(--border-gold);
}

.gallery-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
    transition: var(--transition-gallery);
}

.gallery-header.scrolled .gallery-nav {
    height: 70px;
}

.gallery-brand a {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo-img {
    height: 50px;
    width: auto;
    border-radius: 4px;
    border: 1px solid rgba(212, 175, 55, 0.15);
    background: rgba(255, 255, 255, 0.05);
    transition: var(--transition-gallery);
}

.gallery-header.scrolled .brand-logo-img {
    height: 40px;
}

.brand-name-text {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
    color: #ffffff;
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.menu-item {
    font-weight: 500;
    font-size: 0.92rem;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    position: relative;
    padding: 8px 0;
}

.menu-item:hover, .menu-item.active {
    color: var(--text-gold-light);
}

.menu-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--text-gold);
    transition: var(--transition-gallery);
}

.menu-item:hover::after, .menu-item.active::after {
    width: 100%;
}

.nav-socials {
    display: flex;
    gap: 20px;
    font-size: 1.15rem;
    color: var(--text-secondary);
}

.nav-socials a:hover {
    color: var(--text-gold);
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
}

/* Gold Buttons */
.btn-gold, .btn-outline-gold {
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: var(--transition-gallery);
    letter-spacing: 1px;
}

.btn-gold {
    background-color: var(--text-gold);
    color: #000000;
    border: 1px solid var(--text-gold);
}

.btn-gold:hover {
    background-color: var(--text-gold-light);
    border-color: var(--text-gold-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.15);
}

.btn-outline-gold {
    background-color: transparent;
    color: var(--text-gold);
    border: 1px solid var(--text-gold);
}

.btn-outline-gold:hover {
    background-color: rgba(212, 175, 55, 0.05);
    color: #ffffff;
    border-color: #ffffff;
    transform: translateY(-2px);
}

/* 3. Hero Section */
.hero-gallery {
    position: relative;
    height: 95vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to right, rgba(10, 8, 8, 0.9) 30%, rgba(10, 8, 8, 0.4) 60%, rgba(10, 8, 8, 0.85) 100%);
    z-index: 2;
}

.hero-image-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
    transform: scale(1.05);
    filter: brightness(0.65) contrast(1.1);
}

.hero-caption-area {
    position: relative;
    z-index: 3;
    max-width: 720px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 4.8rem;
    font-weight: 400;
    line-height: 1.05;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.gold-gradient-text {
    background: linear-gradient(135deg, var(--text-gold) 0%, var(--text-gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.hero-tagline {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 40px;
    border-left: 2px solid var(--text-gold);
    padding-left: 20px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* 4. About Gallery Section */
.about-gallery-section {
    padding: 120px 0;
    background: radial-gradient(circle at center, #1b1614 0%, var(--bg-gallery) 100%);
    border-top: 1px solid var(--border-soft);
}

.about-grid-wrapper {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 64px;
    align-items: center;
}

.art-frame {
    position: relative;
    padding: 24px;
    background: #000000;
    box-shadow: 0 30px 60px rgba(0,0,0,0.6);
    display: inline-block;
    width: 100%;
}

.frame-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: sepia(0.1) contrast(1.02);
}

.frame-border {
    position: absolute;
    top: 12px; left: 12px; right: 12px; bottom: 12px;
    border: 1px solid rgba(212, 175, 55, 0.3);
    pointer-events: none;
}

.about-info h2 {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.section-divider {
    width: 80px;
    height: 1px;
    background-color: var(--text-gold);
    margin-bottom: 24px;
}

.about-info .lead {
    font-size: 1.15rem;
    color: #ffffff;
    font-family: var(--font-serif);
    line-height: 1.7;
    margin-bottom: 20px;
}

.about-info .desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 40px;
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.value-item strong {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--text-gold);
    display: block;
    margin-bottom: 8px;
}

.value-item p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
}


/* 5. Core Categories Section */
.categories-section {
    padding: 100px 0;
    border-top: 1px solid var(--border-soft);
    background: var(--bg-gallery);
}

.section-title-area {
    margin-bottom: 60px;
}

.section-title-area h2 {
    font-family: var(--font-serif);
    font-size: 2.6rem;
    font-weight: 400;
    letter-spacing: -0.5px;
}

.title-divider {
    width: 60px;
    height: 1px;
    background-color: var(--text-gold);
    margin: 16px 0 24px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-gold);
    padding: 32px 24px;
    border-radius: 4px;
    transition: var(--transition-gallery);
}

.category-card:hover {
    transform: translateY(-5px);
    background: var(--bg-panel-hover);
    border-color: var(--border-gold-hover);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.cat-icon {
    font-size: 2.2rem;
    color: var(--text-gold);
    margin-bottom: 24px;
}

.category-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.category-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
}


/* 6. Paintings Exhibition Collection Grid */
.collection-section {
    padding: 120px 0;
    border-top: 1px solid var(--border-soft);
    background: #090707;
}

.collection-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Filters */
.gallery-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin: 48px 0;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-soft);
    color: var(--text-secondary);
    padding: 10px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 1px;
    transition: var(--transition-fast);
    border-radius: 4px;
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--text-gold);
    border-color: var(--text-gold);
    color: #000000;
}

/* Paintings Responsive Grid */
.paintings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 32px;
}

.painting-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-gold);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition-gallery);
    cursor: pointer;
}

.painting-card.hidden {
    display: none;
}

.painting-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-gold-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.img-wrapper {
    position: relative;
    overflow: hidden;
    aspect-ratio: 1;
    background: #000000;
}

.img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.painting-card:hover .img-wrapper img {
    transform: scale(1.06);
}

.hover-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-gold-light);
    opacity: 0;
    transition: var(--transition-fast);
    letter-spacing: 1px;
}

.painting-card:hover .hover-overlay {
    opacity: 1;
}

.card-details {
    padding: 24px;
    border-top: 1px solid var(--border-soft);
}

.card-details h4 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 400;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-details .artist {
    font-size: 0.85rem;
    color: var(--text-gold);
    font-weight: 600;
    margin-bottom: 8px;
}

.card-details .media-specs {
    font-size: 0.78rem;
    color: var(--text-muted);
}


/* 7. Branch Locations Section */
.gallery-contact {
    padding: 120px 0;
    background: radial-gradient(circle at center top, #181413 0%, var(--bg-gallery) 80%);
    border-top: 1px solid var(--border-soft);
}

.contact-lead-desc {
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-secondary);
}

.branches-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 60px;
}

.branch-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-gold);
    padding: 48px;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-gallery);
}

.branch-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-gold-hover);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
}

.branch-header-glow {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: linear-gradient(90deg, transparent, var(--text-gold), transparent);
    opacity: 0.3;
    transition: var(--transition-gallery);
}

.branch-card:hover .branch-header-glow {
    opacity: 1;
}

.branch-icon {
    font-size: 2rem;
    color: var(--text-gold);
    margin-bottom: 24px;
}

.branch-card h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.branch-divider {
    width: 40px;
    height: 1px;
    background-color: var(--text-gold);
    margin-bottom: 24px;
}

.branch-info-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.branch-info-list li strong {
    color: #ffffff;
    display: inline-block;
    width: 100px;
}


/* 8. Lightbox Overlay CSS */
.lightbox-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(6, 5, 5, 0.96);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.lightbox-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-close {
    position: absolute;
    top: 24px; right: 24px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2.2rem;
    cursor: pointer;
    z-index: 2100;
    transition: var(--transition-fast);
}

.lightbox-close:hover {
    color: #ffffff;
    transform: rotate(90deg);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(25, 20, 20, 0.5);
    border: 1px solid var(--border-soft);
    color: #ffffff;
    width: 50px; height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    cursor: pointer;
    z-index: 2100;
    transition: var(--transition-fast);
}

.lightbox-nav:hover {
    background-color: var(--text-gold);
    color: #000000;
    border-color: var(--text-gold);
}

.lightbox-nav.prev { left: 32px; }
.lightbox-nav.next { right: 32px; }

.lightbox-content {
    display: flex;
    width: 90%;
    max-width: 1050px;
    height: 80vh;
    background: #000000;
    border: 1px solid var(--border-gold);
    border-radius: 4px;
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}

.lightbox-overlay.open .lightbox-content {
    transform: scale(1);
}

.lightbox-image-container {
    flex: 1.4;
    background: #090808;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
    border-right: 1px solid var(--border-soft);
}

.lightbox-image-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.lightbox-info-panel {
    flex: 0.6;
    background: var(--bg-panel);
    padding: 48px 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.lightbox-info-panel h3 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.lightbox-artist {
    font-size: 1.05rem;
    color: var(--text-gold);
    font-weight: 600;
    margin-bottom: 32px;
}

.lightbox-specs-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 40px;
    border-top: 1px solid var(--border-soft);
    padding-top: 24px;
}

.spec-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 4px;
}

.spec-val {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.btn-gold-inquire {
    display: block;
    width: 100%;
    text-align: center;
    padding: 14px;
    background-color: var(--text-gold);
    color: #000000;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    border-radius: 4px;
    transition: var(--transition-fast);
}

.btn-gold-inquire:hover {
    background-color: var(--text-gold-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(212, 175, 55, 0.2);
}


/* 9. Gallery Footer Section */
.gallery-footer {
    background: #050404;
    padding: 40px 0;
    border-top: 1px solid var(--border-soft);
}

.footer-content-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a:hover {
    color: var(--text-gold);
}


/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 3.8rem;
    }
    
    .about-grid-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .lightbox-content {
        flex-direction: column;
        height: 90vh;
    }
    
    .lightbox-image-container {
        border-right: none;
        border-bottom: 1px solid var(--border-soft);
        flex: 1.2;
    }
    
    .lightbox-info-panel {
        flex: 0.8;
        padding: 24px;
    }
    
    .lightbox-info-panel h3 {
        font-size: 1.8rem;
    }
    
    .lightbox-info-panel .lightbox-artist {
        margin-bottom: 16px;
    }
}

@media (max-width: 768px) {
    /* Menu Mobile Drawer */
    .menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 24px;
        height: 18px;
        background: transparent;
        border: none;
        cursor: pointer;
        z-index: 1100;
    }
    
    .menu-toggle .line {
        width: 100%;
        height: 1px;
        background-color: #ffffff;
        transition: var(--transition-fast);
    }
    
    .menu-toggle.open .line:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .menu-toggle.open .line:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.open .line:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 80%;
        height: 100vh;
        background: rgba(10, 8, 8, 0.98);
        border-left: 1px solid var(--border-soft);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: var(--transition-gallery);
        z-index: 1050;
        backdrop-filter: blur(20px);
    }
    
    .nav-menu.open {
        right: 0;
    }
    
    .nav-socials {
        display: none;
    }
    
    /* Layouts */
    .hero-gallery {
        height: 80vh;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-tagline {
        font-size: 1.15rem;
    }
    
    .about-info h2 {
        font-size: 2.2rem;
    }
    
    .branches-grid {
        grid-template-columns: 1fr;
    }
    
    .branch-card {
        padding: 32px;
    }
    
    .lightbox-nav {
        width: 40px; height: 40px;
    }
    .lightbox-nav.prev { left: 12px; }
    .lightbox-nav.next { right: 12px; }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-gold, .btn-outline-gold {
        width: 100%;
        justify-content: center;
    }
    
    .about-values {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .painting-card {
        max-width: 100%;
    }
    
    .footer-content-wrapper {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}