@charset "UTF-8";

/*
 * Contemporary Art Gallery Aesthetic
 * Inspired by fore-seen-property.com
 * Minimalist · Editorial · High Contrast
 */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600&family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Playfair+Display:wght@400;500;600;700;800;900&family=Cormorant+Garamond:wght@300;400;500;600;700&display=swap');

:root {
    /* Dark Warm Palette - inspired by v2 */
    --bg-dark: #0a0908;
    --bg-warm: #1a1512;
    --bg-accent: #2b1d1d;
    --surface: #1e1814;
    --surface-hover: #2a221e;
    --border: #3d2f2a;
    --border-light: #4a3a34;
    --text-muted: #8a7a72;
    --text-secondary: #b5a59a;
    --text-primary: #e8ddd5;
    --pure-white: #ffffff;

    /* Accent colors from food theme */
    --accent-red: #ff6b6b;
    --accent-gold: #feca57;
    --accent-green: #94ed5c;

    /* Typography */
    --font-sans: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Libre Baskerville', Georgia, serif;
    --font-display: 'Playfair Display', Georgia, serif;
    --font-elegant: 'Cormorant Garamond', Georgia, serif;

    /* Spacing Scale */
    --space-2xs: 0.25rem;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 10rem;

    /* Animation */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 0.2s;
    --duration: 0.4s;
    --duration-slow: 0.8s;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: radial-gradient(circle at center, var(--bg-accent) 0%, var(--bg-dark) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

::selection {
    background: var(--accent-gold);
    color: var(--bg-dark);
}

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

a {
    color: inherit;
    text-decoration: none;
}

/* ========================
   TYPOGRAPHY
   ======================== */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

h1 {
    font-size: clamp(2.5rem, 7vw, 5.5rem);
    font-weight: 400;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.75rem);
}

p {
    font-size: clamp(0.9rem, 1.1vw, 1.05rem);
    line-height: 1.75;
    color: var(--text-secondary);
    font-weight: 300;
}

.text-uppercase {
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.75rem;
    font-weight: 500;
}

/* ========================
   NAVIGATION
   ======================== */
.hamburger-menu {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 2000;
}

.hamburger-btn {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 0;
    transition: all var(--duration) var(--ease);
    backdrop-filter: blur(10px);
}

.hamburger-btn:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.05);
}

.hamburger-line {
    width: 20px;
    height: 1px;
    background: var(--pure-white);
    transition: all 0.3s var(--ease);
}

.hamburger-btn.active {
    border-color: var(--accent-gold);
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Menu Dropdown - Minimal */
.menu-dropdown {
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    background: rgba(30, 24, 20, 0.95);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--space-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s var(--ease);
    min-width: 200px;
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.menu-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.menu-item {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    transition: all var(--duration-fast) var(--ease);
    position: relative;
    border-radius: 8px;
}

.menu-item::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 50%;
    width: 0;
    height: 1px;
    background: var(--accent-gold);
    transition: width 0.3s var(--ease);
    transform: translateY(-50%);
}

.menu-item:hover {
    color: var(--pure-white);
    padding-left: var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
}

.menu-item:hover::before {
    width: var(--space-sm);
}

/* ========================
   HOMEPAGE - 3D SCENE
   ======================== */
#scene-container {
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
}

.scene-spacer {
    height: 100vh;
    pointer-events: none;
}

.hero-title {
    position: absolute;
    top: var(--space-lg);
    left: var(--space-lg);
    z-index: 100;
}

.hero-title h1 {
    font-family: var(--font-sans);
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pure-white);
    margin-bottom: var(--space-2xs);
}

.hero-title .subtitle {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    font-style: italic;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 400;
}

.scene-controls {
    position: absolute;
    bottom: var(--space-lg);
    left: var(--space-lg);
    z-index: 100;
}

.control-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--pure-white);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    backdrop-filter: blur(10px);
    border-radius: 6px;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.scene-hint {
    margin-top: var(--space-sm);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
}

/* ========================
   PAGE CONTAINER
   ======================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg) var(--space-2xl);
    min-height: 100vh;
}

/* Page Header */
.page-header {
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border);
}

.page-header h1 {
    margin-bottom: var(--space-sm);
    opacity: 0;
    transform: translateY(30px);
    animation: revealUp var(--duration-slow) var(--ease) 0.1s forwards;
}

.page-header .subtitle {
    font-family: var(--font-serif);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-style: italic;
    color: var(--text-muted);
    font-weight: 400;
    opacity: 0;
    transform: translateY(20px);
    animation: revealUp var(--duration-slow) var(--ease) 0.2s forwards;
}

.page-header p {
    margin-top: var(--space-md);
    opacity: 0;
    transform: translateY(20px);
    animation: revealUp var(--duration-slow) var(--ease) 0.3s forwards;
}

@keyframes revealUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================
   TEAM SECTION (ABOUT)
   ======================== */
.team-grid {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.team-member {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: var(--surface);
    transition: background var(--duration) var(--ease);
    opacity: 0;
    transform: translateY(20px);
    animation: revealUp var(--duration-slow) var(--ease) forwards;
}

.team-member:nth-child(1) { animation-delay: 0.1s; }
.team-member:nth-child(2) { animation-delay: 0.15s; }
.team-member:nth-child(3) { animation-delay: 0.2s; }
.team-member:nth-child(4) { animation-delay: 0.25s; }
.team-member:nth-child(5) { animation-delay: 0.3s; }
.team-member:nth-child(6) { animation-delay: 0.35s; }
.team-member:nth-child(7) { animation-delay: 0.4s; }
.team-member:nth-child(8) { animation-delay: 0.45s; }

.team-member:hover {
    background: var(--surface-hover);
}

.team-member img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    filter: grayscale(50%);
    transition: filter var(--duration) var(--ease);
}

.team-member:hover img {
    filter: grayscale(0%);
}

.team-member img.partner-logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    background: var(--text-primary);
    padding: var(--space-sm);
    filter: none;
    border-radius: 8px;
}

.member-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.member-info h3 {
    font-family: var(--font-sans);
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.member-info p {
    font-size: 0.9rem;
    line-height: 1.8;
}

/* ========================
   EXHIBITION SECTION
   ======================== */
.exhibition-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.video-section {
    opacity: 0;
    transform: translateY(30px);
    animation: revealUp var(--duration-slow) var(--ease) 0.2s forwards;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    background: var(--surface);
    overflow: hidden;
    border-radius: 12px;
}

.video-wrapper iframe,
.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.text-section {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border);
    opacity: 0;
    transform: translateY(30px);
    animation: revealUp var(--duration-slow) var(--ease) 0.3s forwards;
}

.text-section h3 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
}

.text-section p {
    margin-bottom: var(--space-md);
}

.text-section p:last-child {
    margin-bottom: 0;
}

.text-section p strong {
    color: var(--accent-gold);
    font-weight: 500;
}

/* ========================
   PARTICLE CONTAINER
   ======================== */
#particle-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    opacity: 0.5;
}

/* ========================
   SCROLLABLE CARDS SECTION
   ======================== */
.cards-section {
    position: relative;
    padding: var(--space-3xl) var(--space-lg);
    background: linear-gradient(180deg, transparent 0%, rgba(10, 9, 8, 0.95) 20%, var(--bg-dark) 100%);
    min-height: 100vh;
    z-index: 10;
}

.cards-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.card {
    background: var(--surface);
    transition: background var(--duration) var(--ease);
}

.card:hover {
    background: var(--surface-hover);
}

.card-header {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease);
}

.card-number {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    min-width: 40px;
}

.card-title {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
}

.title-en {
    font-family: var(--font-serif);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.title-zh {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 300;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

.card-toggle {
    width: 48px;
    height: 48px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast) var(--ease);
}

.card-toggle:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-gold);
}

.toggle-icon {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-primary);
    transition: transform var(--duration) var(--ease);
}

.card.expanded .toggle-icon {
    transform: rotate(45deg);
}

.card-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-slow) var(--ease);
}

.card.expanded .card-content {
    max-height: 1000px;
}

.card-content-inner {
    padding: 0 var(--space-xl) var(--space-xl);
    padding-left: calc(40px + var(--space-lg) + var(--space-xl));
}

.card-description {
    margin-bottom: var(--space-lg);
}

.card-description p {
    font-size: 0.9rem;
    line-height: 1.85;
    margin-bottom: var(--space-md);
}

.card-description p:last-child {
    margin-bottom: 0;
}

.card-media {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.card-media img {
    width: calc(33.333% - var(--space-sm));
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    transition: all var(--duration-fast) var(--ease);
    filter: grayscale(30%);
}

.card-media img:hover {
    filter: grayscale(0%);
    transform: scale(1.02);
}

/* ========================
   SCROLLBAR
   ======================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* ========================
   RESPONSIVE
   ======================== */
@media (max-width: 1024px) {
}

@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 3rem;
        --space-2xl: 4rem;
        --space-3xl: 6rem;
    }

    .hamburger-menu {
        top: var(--space-sm);
        right: var(--space-sm);
    }

    .hamburger-btn {
        width: 48px;
        height: 48px;
    }

    .team-member {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-lg);
    }

    .team-member img {
        width: 150px;
        height: 150px;
        margin: 0 auto;
        border-radius: 50%;
    }

    .team-member img.partner-logo {
        width: 100px;
        height: 100px;
        border-radius: 0;
    }

    .member-info {
        align-items: center;
    }

    .member-info p {
        text-align: left;
    }

    .hero-title {
        left: var(--space-sm);
        top: var(--space-sm);
    }

    .scene-controls {
        left: var(--space-sm);
        bottom: var(--space-sm);
    }

    .cards-section {
        padding: var(--space-xl) var(--space-sm);
    }

    .card-header {
        padding: var(--space-md);
        gap: var(--space-sm);
    }

    .card-number {
        display: none;
    }

    .title-en {
        font-size: 1.1rem;
    }

    .title-zh {
        font-size: 0.75rem;
    }

    .card-toggle {
        width: 40px;
        height: 40px;
    }

    .card-content-inner {
        padding: 0 var(--space-md) var(--space-md);
        padding-left: var(--space-md);
    }

    .card-media {
        flex-direction: column;
    }

    .card-media img {
        width: 100%;
        height: 200px;
    }
}