:root {
    --ceads-primary: #c57a45;
    --ceads-primary-dark: #a86535;
    --ceads-primary-light: #e8a96a;
    --ceads-gold: #d4a76a;
    --ceads-gold-light: #f0d9a8;
    --ceads-blue: #2a7ab5;
    --ceads-dark: #2c3237;
    --ceads-black: #1a1e22;
    --ceads-light: #f5f0eb;
    --accent-vivid: #ff6b35;
    --text-main: #333940;
    --text-muted: #6c757d;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --transition-slow: all 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
    --transition-fast: all 0.3s ease;
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 30px rgba(197,122,69,0.25);
    --gradient-copper: linear-gradient(135deg, var(--ceads-primary), var(--ceads-gold), var(--ceads-primary-light));
    --gradient-gold-text: linear-gradient(135deg, #c57a45, #e8a96a, #d4a76a, #c57a45);
}

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

/* Top Navigation */
.sc-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.4s ease;
}
.sc-nav.scrolled {
    background: rgba(26, 30, 34, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 12px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.sc-nav-logo img {
    height: 60px;
    transition: all 0.3s ease;
    filter: brightness(0) invert(1);
}
.sc-nav.scrolled .sc-nav-logo img {
    height: 50px;
}
.sc-nav-links {
    display: flex;
    gap: 8px;
    align-items: center;
}
.sc-nav-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 20px;
    transition: all 0.3s ease;
}
.sc-nav-links a:hover {
    color: #fff;
    background: rgba(255,255,255,0.12);
}
.sc-nav-links a.sc-nav-active {
    color: #fff;
    background: var(--ceads-primary);
}
.sc-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    flex-direction: column;
    gap: 5px;
}
.sc-nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

@media (max-width: 992px) {
    .sc-nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        background: rgba(26, 30, 34, 0.95);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 16px 24px;
        gap: 4px;
    }
    .sc-nav-links.open { display: flex; }
    .sc-nav-links a {
        padding: 10px 16px;
        border-radius: 8px;
        width: 100%;
    }
    .sc-nav-toggle { display: flex; }
}

body {
    font-family: "Open Sans", 'Microsoft YaHei', 'PingFang SC', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.8;
    overflow-x: hidden;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Dynamic Animations */
.reveal { opacity: 0; transform: translateY(50px); transition: var(--transition-slow); }
.reveal.active { opacity: 1; transform: translateY(0); }

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}
.floating { animation: float 4s ease-in-out infinite; }

@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}
@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(197,122,69,0.3); }
    50% { box-shadow: 0 0 40px rgba(197,122,69,0.6), 0 0 80px rgba(197,122,69,0.2); }
}
@keyframes rotate-slow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
@keyframes fade-float {
    0%, 100% { opacity: 0.3; transform: translateY(0) scale(1); }
    50% { opacity: 0.6; transform: translateY(-20px) scale(1.1); }
}

/* Sections */
section { padding: 120px 0; position: relative; }

/* Utils */
.section-title { margin-bottom: 80px; text-align: center; }
.section-title h2 { font-size: 2.8rem; font-weight: 800; color: var(--ceads-dark); position: relative; display: inline-block; }
.section-title .sub { color: var(--ceads-primary); font-weight: 700; text-transform: uppercase; letter-spacing: 2px; display: block; margin-bottom: 10px; }

.btn {
    padding: 18px 45px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 800;
    transition: var(--transition-fast);
    display: inline-block;
    cursor: pointer;
}
.btn-primary { background: var(--ceads-primary); color: white; border: none; }
.btn-primary:hover { transform: scale(1.05); box-shadow: 0 10px 20px rgba(197, 122, 69, 0.3); }

/* 1. Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(rgba(0,0,0,0.45), rgba(0,0,0,0.55)),
                url('../images/ceads/summer-school/hero-bg.jpg') center/cover no-repeat;
    background-attachment: fixed;
    color: var(--white);
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}
/* Decorative floating particles */
.hero::before {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(197,122,69,0.15) 0%, transparent 70%);
    top: 10%; right: 8%;
    animation: fade-float 8s ease-in-out infinite;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: 15%; left: 5%;
    width: 200px; height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(212,167,106,0.12) 0%, transparent 70%);
    pointer-events: none;
    animation: fade-float 6s ease-in-out infinite 2s;
}

.hero h1 {
    font-size: 4.2rem; font-weight: 800; line-height: 1.1; margin-bottom: 20px; letter-spacing: -2px;
    background: linear-gradient(135deg, #ffffff 0%, #f0d9a8 40%, #ffffff 60%, #e8a96a 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 6s linear infinite;
}
.hero-top p { font-size: 1.3rem; margin-bottom: 0; opacity: 0.85; max-width: 700px; margin-left: auto; margin-right: auto; }

/* Hero Promo Card — Glassmorphism */
.hero-promo {
    margin-top: 50px;
    position: relative;
    z-index: 2;
}
.hero-promo-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 0;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.hero-promo-info {
    padding: 45px 40px;
    color: white;
}
.hero-promo-label {
    color: var(--ceads-primary-light);
    font-weight: 800;
    letter-spacing: 2px;
    font-size: 0.85rem;
}
.hero-promo-title {
    font-size: 2.6rem;
    font-weight: 800;
    margin: 10px 0 16px;
    color: white;
    background: none;
    -webkit-text-fill-color: white;
}
.hero-promo-desc {
    font-size: 1rem;
    opacity: 0.8;
    margin-bottom: 24px;
    line-height: 1.6;
}
.hero-promo-details {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 20px 24px;
}
.hero-promo-details p {
    margin: 0 0 8px;
    font-size: 0.95rem;
    opacity: 0.9;
}
.hero-promo-details p:last-child { margin-bottom: 0; }

.hero-promo-apply {
    padding: 45px 40px;
    background: rgba(197,122,69,0.85);
    backdrop-filter: blur(10px);
    color: white;
}
.hero-promo-apply h3 {
    margin-bottom: 20px;
    font-size: 1.3rem;
    border-bottom: 2px solid rgba(255,255,255,0.3);
    display: inline-block;
    padding-bottom: 8px;
    color: white;
}
.hero-promo-apply > p {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 16px;
}
.hero-promo-apply > p.hero-promo-note {
    text-align: center;
    margin-top: 12px;
    margin-bottom: 2px;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.7);
}
.hero-promo-apply > p.hero-promo-deadline {
    text-align: center;
    margin-top: 0;
    margin-bottom: 0;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}
.hero-promo-email {
    display: block;
    width: 100%;
    text-align: center;
    padding: 14px;
    background: white;
    color: var(--ceads-primary);
    font-weight: 800;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.95rem;
}
.hero-promo-email:hover {
    transform: scale(1.03);
    box-shadow: 0 6px 20px rgba(255,255,255,0.3);
}
.hero-promo-qr {
    display: block;
    width: 100px;
    height: 100px;
    margin: 16px auto 0;
    border-radius: 8px;
    border: 2px solid rgba(255,255,255,0.3);
}

/* CTA button glow */
.btn-primary {
    position: relative;
    overflow: hidden;
}
.btn-primary::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-copper);
    border-radius: 50px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s;
    filter: blur(12px);
}
.btn-primary:hover::before { opacity: 1; }
.hero .btn-primary {
    box-shadow: 0 4px 20px rgba(197,122,69,0.4);
}
.hero .btn-primary:hover {
    box-shadow: 0 6px 30px rgba(197,122,69,0.6);
}

/* 2. Promo Section — now merged into Hero, legacy styles kept minimal */
.promo-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }

/* 3. About & Program Expansion */
.program-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
    counter-reset: program-counter;
}
.program-card {
    background: var(--ceads-light);
    padding: 50px 40px 40px;
    border-radius: 20px;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    counter-increment: program-counter;
}
/* Numbered badge */
.program-card::before {
    content: counter(program-counter, decimal-leading-zero);
    position: absolute;
    top: 16px; right: 20px;
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-copper);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.2;
    transition: opacity 0.3s;
}
/* Top gradient accent bar */
.program-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-copper);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}
.program-card:hover::after { transform: scaleX(1); }
.program-card:hover::before { opacity: 0.4; }
.program-card:hover { background: var(--white); box-shadow: var(--shadow-lg), 0 0 0 1px rgba(197,122,69,0.08); transform: translateY(-10px); }
.program-card h4 { color: var(--ceads-primary); font-size: 1.3rem; margin-bottom: 15px; }


/* 4. Media Archive Hub */
.hub-section { background: var(--ceads-light); }
.filter-bar { display: flex; justify-content: center; gap: 15px; margin-bottom: 50px; flex-wrap: wrap; }
.filter-btn {
    padding: 10px 24px;
    border-radius: 30px;
    background: var(--white);
    border: 1px solid var(--border-color);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--text-main);
}
.filter-btn.active { background: var(--ceads-primary); color: var(--white); border-color: var(--ceads-primary); }
.filter-btn:hover:not(.active) { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    min-height: 400px;
}
.media-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: var(--transition-slow);
    position: relative;
}
.media-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-copper);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}
.media-card:hover::after { transform: scaleX(1); }
.media-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg), 0 0 0 1px rgba(197,122,69,0.1); }

/* Media card inner structure */
.media-card-link { text-decoration: none; color: inherit; display: block; }
.media-card-thumb {
    height: 220px;
    background-size: cover;
    background-position: center;
    position: relative;
    cursor: pointer;
    transition: transform 0.3s;
    overflow: hidden;
}
.media-card-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0);
    transition: background 0.3s;
}
.media-card:hover .media-card-thumb::after { background: rgba(0,0,0,0.2); }
.media-card-info {
    padding: 24px;
    position: relative;
    z-index: 2;
    background: white;
}
.media-card-info h4 { margin-top: 15px; font-size: 1.1rem; }
.media-card-year {
    font-size: 0.8rem;
    background: var(--ceads-light);
    color: var(--ceads-primary-dark);
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 700;
}
.media-card-tag { font-size: 0.8rem; color: #888; }

.media-play-icon {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 54px; height: 54px;
    background: rgba(197, 122, 69, 0.9);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 1.2rem;
    padding-left: 4px;
    z-index: 2;
    transition: transform 0.3s, box-shadow 0.3s;
}
.media-card:hover .media-play-icon { transform: translate(-50%, -50%) scale(1.1); box-shadow: 0 6px 20px rgba(197,122,69,0.4); }

.media-zoom-icon {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 48px; height: 48px;
    background: rgba(197, 122, 69, 0.85);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    z-index: 2;
    transition: transform 0.3s;
    opacity: 0;
}
.media-card:hover .media-zoom-icon { transform: translate(-50%, -50%) scale(1); opacity: 1; }

/* Magnific Popup fade animation */
.mfp-fade.mfp-bg { opacity: 0; transition: all 0.2s ease-out; }
.mfp-fade.mfp-bg.mfp-ready { opacity: 0.85; }
.mfp-fade.mfp-bg.mfp-removing { opacity: 0; }
.mfp-fade.mfp-wrap .mfp-content { opacity: 0; transition: all 0.2s ease-out; }
.mfp-fade.mfp-wrap.mfp-ready .mfp-content { opacity: 1; }
.mfp-fade.mfp-wrap.mfp-removing .mfp-content { opacity: 0; }


/* 5. Speakers Section — Marquee */
.speakers-section { background: #fdfdfd; overflow: hidden; }
.speaker-marquee {
    display: flex;
    width: max-content;
    animation: marquee 40s linear infinite;
}
.speaker-marquee:hover { animation-play-state: paused; }
@keyframes marquee {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.speaker-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
    text-align: center;
    padding: 40px 20px;
    width: 260px;
    flex-shrink: 0;
    margin-right: 30px;
    position: relative;
}
/* Bottom gradient accent line */
.speaker-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-copper);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}
.speaker-card:hover::after { transform: scaleX(1); }
.speaker-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg), var(--shadow-glow); border-color: var(--ceads-primary-light); }
.speaker-avatar {
    width: 120px; height: 120px;
    background: var(--ceads-light);
    border-radius: 50%;
    margin: 0 auto 20px;
    display: flex; align-items: center; justify-content: center;
    font-size: 2.5rem; color: var(--ceads-primary);
    position: relative;
    transition: var(--transition-fast);
    overflow: hidden;
}
.speaker-avatar img {
    width: 100%; height: 100%;
    object-fit: cover;
    border-radius: 50%;
}
/* Gradient glow ring */
.speaker-avatar::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient-copper);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s;
}
.speaker-card:hover .speaker-avatar::before { opacity: 1; }
.speaker-card:hover .speaker-avatar {
    box-shadow: 0 0 20px rgba(197,122,69,0.2);
}
.speaker-card h4 { font-size: 1.2rem; margin-bottom: 5px; }
.speaker-card p { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }

/* 6. Partners (NEW) */
.partners-section {
    border-top: none;
    padding: 80px 0;
    position: relative;
}
/* Gradient top border */
.partners-section::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--ceads-primary-light), var(--ceads-primary), var(--ceads-primary-light), transparent);
}
.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 60px;
}
.partner-logo {
    font-weight: 800;
    color: #aaa;
    font-size: 1.2rem;
    transition: var(--transition-fast);
    cursor: default;
}
.partner-logo:hover { color: var(--ceads-primary); transform: translateY(-2px); }

/* 7. Footer */
.site-footer {
    background: var(--ceads-black);
    color: white;
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
}
/* Gradient top accent */
.site-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-copper);
}
/* Subtle dot pattern background */
.site-footer::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(197,122,69,0.06) 1px, transparent 1px);
    background-size: 30px 30px;
    pointer-events: none;
}
.site-footer .container { position: relative; z-index: 1; }
.site-footer .btn-primary:hover {
    box-shadow: 0 0 30px rgba(197,122,69,0.5);
}
.site-footer a[style*="border: 1px solid"]:hover {
    border-color: rgba(197,122,69,0.5) !important;
    color: var(--ceads-primary-light) !important;
    box-shadow: 0 0 20px rgba(197,122,69,0.15);
}

/* Awards section enhancements */
.awards-section {
    background: linear-gradient(135deg, #fdf8f3 0%, #f5f0eb 100%);
    position: relative;
    overflow: hidden;
}
.awards-section::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 300px; height: 300px;
    background: radial-gradient(circle, rgba(197,122,69,0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.awards-section::after {
    content: '';
    position: absolute;
    bottom: -80px; left: -80px;
    width: 250px; height: 250px;
    background: radial-gradient(circle, rgba(212,167,106,0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.award-card {
    flex: 1;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid #e8d5b8;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: var(--transition-fast);
}
.award-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(197,122,69,0.12);
    border-color: var(--ceads-primary-light);
}
.award-amount {
    font-size: 1.2rem;
    font-weight: 800;
    margin: 4px 0;
    background: linear-gradient(135deg, #b8860b, #d4a76a, #e8a96a, #b8860b);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 4s linear infinite;
}
.trophy-glow {
    animation: glow-pulse 3s ease-in-out infinite;
    border-radius: 50%;
    display: inline-block;
}


@media (max-width: 992px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .program-grid { grid-template-columns: 1fr; }
    .promo-grid { grid-template-columns: 1fr; }
    .hero-promo-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 3.2rem; }
}
@media (max-width: 600px) {
    .hero { padding: 100px 0 60px; }
    .hero h1 { font-size: 2.5rem; }
    .hero-top p { font-size: 1.05rem; }
    .hero-promo-info { padding: 30px 24px; }
    .hero-promo-apply { padding: 30px 24px; }
    .hero-promo-title { font-size: 2rem; }
}