/* ============================================
   195th EAAE Seminar - Premium Design
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-dark: #0a0a0a;
    --color-dark-2: #141419;
    --color-dark-3: #1c1c24;
    --color-accent: #0bb4aa;
    --color-accent-light: #14d4c8;
    --color-accent-dark: #099e95;
    --color-bg: #f8f9fc;
    --color-bg-alt: #ffffff;
    --color-text: #191b24;
    --color-text-secondary: #5a5a65;
    --color-text-muted: #94949e;
    --color-orange: #e8652b;
    --color-orange-hover: #d45520;
    --color-white: #ffffff;
    --color-border: rgba(0, 0, 0, 0.06);
    --font-heading: 'Onest', sans-serif;
    --font-body: 'Inter', sans-serif;
    --container-max: 1200px;
    --radius: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

a:hover { color: var(--color-accent-light); }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 40px;
}

/* --- Header --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 22px 0;
    transition: all var(--transition);
}

.site-header.scrolled {
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 3px;
}

.logo-divider {
    width: 1px;
    height: 20px;
    background: rgba(255,255,255,0.25);
}

.logo-sub {
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 500;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.5px;
}

.logo-sub sup {
    font-size: 8px;
}

.main-nav {
    display: flex;
    gap: 8px;
    align-items: center;
}

.main-nav a {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    padding: 8px 14px;
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.main-nav a:hover {
    color: var(--color-white);
    background: rgba(255,255,255,0.08);
}

.main-nav .nav-cta {
    background: var(--color-accent);
    color: var(--color-dark) !important;
    font-weight: 600;
    margin-left: 8px;
}

.main-nav .nav-cta:hover {
    background: var(--color-accent-light);
}

/* Nav overlay - zero size by default, expands only when active */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
    transition: opacity var(--transition);
}

.nav-overlay.active {
    width: 100%;
    height: 100%;
    opacity: 1;
    pointer-events: auto;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition);
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--color-dark);
    overflow: hidden;
}

.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 10, 10, 0.4) 0%,
        rgba(10, 10, 10, 0.55) 50%,
        rgba(10, 10, 10, 0.75) 100%
    );
    z-index: 1;
}

.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 900px;
    padding: 0 30px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 32px;
    padding: 10px 24px;
    background: rgba(11, 180, 170, 0.1);
    border: 1px solid rgba(11, 180, 170, 0.25);
    border-radius: 50px;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(32px, 5.5vw, 60px);
    font-weight: 700;
    line-height: 1.08;
    color: var(--color-white);
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.text-accent {
    color: var(--color-accent);
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: clamp(16px, 2.2vw, 21px);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
    letter-spacing: 0.5px;
}

.hero-meta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.meta-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 24px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    backdrop-filter: blur(10px);
    color: var(--color-white);
}

.meta-card svg {
    opacity: 0.5;
    flex-shrink: 0;
}

.meta-card div {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.meta-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(255,255,255,0.45);
    font-weight: 500;
}

.meta-value {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.35);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-family: var(--font-heading);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, rgba(255,255,255,0.4), transparent);
    animation: scroll-anim 2s ease-in-out infinite;
}

@keyframes scroll-anim {
    0% { transform: scaleY(0); transform-origin: top; opacity: 1; }
    50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; opacity: 1; }
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    padding: 15px 36px;
    border-radius: 12px;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: var(--color-orange);
    color: var(--color-white);
    box-shadow: 0 4px 16px rgba(232, 101, 43, 0.3);
}

.btn-primary:hover {
    background: var(--color-orange-hover);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(232, 101, 43, 0.4);
}

.btn-ghost {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255,255,255,0.2);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.08);
    color: var(--color-white);
    border-color: rgba(255,255,255,0.35);
}

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

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.12;
    color: var(--color-dark);
    margin-bottom: 20px;
    letter-spacing: -0.3px;
}

.section-title.text-white { color: var(--color-white); }

.section-header-center {
    text-align: center;
    margin-bottom: 64px;
}

.section-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.5);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-desc.text-secondary {
    color: var(--color-text-secondary);
}

/* --- Stats Ribbon --- */
.stats-ribbon {
    background: var(--color-dark);
    padding: 48px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.stats-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.stat-item {
    flex: 1;
    text-align: center;
    padding: 12px 24px;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    letter-spacing: 0.3px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: rgba(255,255,255,0.1);
    flex-shrink: 0;
}

/* --- Hero Logos --- */
.hero-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 36px;
    padding-bottom: 36px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.hero-logos a {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.95);
    padding: 12px 22px;
    border-radius: 12px;
    transition: all var(--transition);
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.hero-logos a:hover {
    background: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.hero-logos img {
    height: 50px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
}

.logos-label {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    margin-bottom: 24px;
}

@media (max-width: 768px) {
    .hero-logos { gap: 12px; margin-bottom: 28px; padding-bottom: 28px; }
    .hero-logos a { padding: 8px 16px; border-radius: 10px; }
    .hero-logos img { height: 44px; max-width: 140px; }
}

@media (max-width: 480px) {
    .hero-logos { gap: 10px; }
    .hero-logos a { padding: 6px 12px; }
    .hero-logos img { height: 36px; max-width: 110px; }
}

/* --- About --- */
.section-about {
    background: var(--color-bg);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-lead {
    font-size: 18px;
    line-height: 1.75;
    color: var(--color-text);
    margin-bottom: 32px;
    font-weight: 400;
}

.about-highlight {
    display: flex;
    gap: 20px;
    padding: 28px 0;
    margin-top: 16px;
}

.highlight-accent {
    width: 3px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
    border-radius: 3px;
}

.about-highlight p {
    font-size: 17px;
    line-height: 1.7;
    color: var(--color-text);
    margin: 0;
}

.about-text-block p {
    margin-bottom: 20px;
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.8;
}

.about-text-block strong {
    color: var(--color-text);
    font-weight: 600;
}

.sdg-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.sdg-tag {
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 8px;
    letter-spacing: 0.3px;
}

.sdg-2 { background: #dff0d8; color: #3c763d; }
.sdg-5 { background: #fce4d6; color: #c0392b; }
.sdg-13 { background: #d6eaf8; color: #1a5276; }

/* --- Location Showcase --- */
.section-location {
    position: relative;
    height: 85vh;
    min-height: 550px;
    max-height: 800px;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
}

.location-images {
    position: absolute;
    inset: -40px;
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 0;
    transition: transform 0.15s cubic-bezier(0.2, 0, 0.2, 1);
    will-change: transform;
}

.loc-img {
    overflow: hidden;
    position: relative;
}

.loc-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.08);
    transition: transform 0.8s cubic-bezier(0.2, 0, 0.2, 1), filter 0.8s ease;
    will-change: transform;
}

/* Mouse-reactive shine overlay */
.loc-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        circle 400px at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(11, 180, 170, 0.08) 0%,
        transparent 60%
    );
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.section-location:hover .loc-img::after {
    opacity: 1;
}

.loc-img-side {
    position: relative;
}

.loc-img-side::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(255,255,255,0.15);
    z-index: 2;
}

.location-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        0deg,
        rgba(10, 10, 10, 0.92) 0%,
        rgba(10, 10, 10, 0.6) 35%,
        rgba(10, 10, 10, 0.15) 60%,
        rgba(10, 10, 10, 0.08) 100%
    );
    z-index: 2;
}

.location-content {
    position: relative;
    z-index: 3;
    width: 100%;
    padding-bottom: 60px;
}

.loc-inner {
    max-width: 700px;
}

.loc-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 20px;
    padding: 8px 18px;
    background: rgba(11, 180, 170, 0.12);
    border: 1px solid rgba(11, 180, 170, 0.2);
    border-radius: 50px;
    backdrop-filter: blur(10px);
}

.loc-badge svg {
    opacity: 0.7;
}

.section-location h2 {
    font-family: var(--font-heading);
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    color: var(--color-white);
    line-height: 1.05;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.loc-subtitle {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 400;
    color: rgba(255,255,255,0.45);
    margin-bottom: 24px;
    font-style: italic;
}

.loc-desc {
    font-size: 15px;
    line-height: 1.8;
    color: rgba(255,255,255,0.65);
    margin-bottom: 28px;
    max-width: 580px;
}

.loc-details {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
}

.loc-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 500;
    color: rgba(255,255,255,0.5);
}

.loc-detail svg {
    color: var(--color-accent);
    opacity: 0.6;
}

.loc-credit {
    position: absolute;
    bottom: 12px;
    right: 20px;
    z-index: 4;
    font-size: 10px;
    color: rgba(255,255,255,0.2);
    font-family: var(--font-body);
}

/* --- Objectives --- */
.section-objectives {
    background: var(--color-dark);
    position: relative;
    overflow: hidden;
}

.section-objectives::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(11,180,170,0.08) 0%, transparent 70%);
    pointer-events: none;
}

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.objective-card {
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    overflow: hidden;
}

.objective-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.objective-card:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-6px);
    border-color: rgba(11, 180, 170, 0.2);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.objective-card:hover::before {
    opacity: 1;
}

.obj-num {
    position: absolute;
    top: 20px;
    right: 24px;
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 800;
    color: rgba(255,255,255,0.03);
    line-height: 1;
}

.objective-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(11, 180, 170, 0.1);
    color: var(--color-accent);
    margin-bottom: 20px;
}

.objective-card h4 {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 10px;
}

.objective-card p {
    font-size: 14px;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.5);
}

/* --- Topics --- */
.section-topics {
    background: var(--color-bg);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.topic-card {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
    overflow: hidden;
}

.topic-accent {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    transition: height var(--transition);
}

.topic-card[data-color="teal"] .topic-accent { background: var(--color-accent); }
.topic-card[data-color="blue"] .topic-accent { background: #4a90d9; }
.topic-card[data-color="green"] .topic-accent { background: #2ecc71; }
.topic-card[data-color="orange"] .topic-accent { background: var(--color-orange); }

.topic-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.topic-card:hover .topic-accent {
    height: 4px;
}

.topic-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.topic-icon-wrap {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
}

.topic-card[data-color="teal"] .topic-icon-wrap { color: var(--color-accent); background: rgba(11,180,170,0.08); }
.topic-card[data-color="blue"] .topic-icon-wrap { color: #4a90d9; background: rgba(74,144,217,0.08); }
.topic-card[data-color="green"] .topic-icon-wrap { color: #2ecc71; background: rgba(46,204,113,0.08); }
.topic-card[data-color="orange"] .topic-icon-wrap { color: var(--color-orange); background: rgba(232,101,43,0.08); }

.topic-number {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-muted);
}

.topic-card h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.topic-card ul {
    list-style: none;
    padding: 0;
}

.topic-card ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.topic-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
}

.topic-card[data-color="teal"] ul li::before { background: var(--color-accent); }
.topic-card[data-color="blue"] ul li::before { background: #4a90d9; }
.topic-card[data-color="green"] ul li::before { background: #2ecc71; }
.topic-card[data-color="orange"] ul li::before { background: var(--color-orange); }

/* --- Dates / Timeline --- */
.section-dates {
    background: linear-gradient(135deg, #0c1f1e 0%, var(--color-dark) 50%, #0c1f1e 100%);
    overflow: hidden;
}

.timeline {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-top: 40px;
}

.timeline-track {
    position: absolute;
    top: 58px;
    left: 5%;
    right: 5%;
    height: 2px;
    background: rgba(255,255,255,0.1);
}

.timeline-track::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 80%;
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), rgba(11,180,170,0.3));
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
}

.timeline-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-dark-2);
    border: 2px solid rgba(11,180,170,0.5);
    margin-bottom: 24px;
    z-index: 1;
    transition: all var(--transition);
}

.timeline-dot-active {
    width: 22px;
    height: 22px;
    background: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(11,180,170,0.4);
}

.timeline-card {
    text-align: center;
    padding: 24px 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius);
    width: 100%;
    max-width: 180px;
    transition: all var(--transition);
}

.timeline-card:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-4px);
}

.timeline-card-active {
    background: rgba(11,180,170,0.1);
    border-color: rgba(11,180,170,0.3);
}

.timeline-month {
    display: block;
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
}

.timeline-day {
    display: block;
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
}

.timeline-year {
    display: block;
    font-size: 12px;
    color: rgba(255,255,255,0.3);
    margin-bottom: 12px;
}

.timeline-card p {
    font-size: 13px;
    color: rgba(255,255,255,0.55);
    line-height: 1.4;
}

.timeline-card-active p {
    color: rgba(255,255,255,0.8);
}

/* --- Programme --- */
.section-programme {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.programme-days {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.programme-day {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.day-header {
    padding: 28px 32px 20px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 16px;
}

.day-label {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-dark);
    background: var(--color-accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 6px;
}

.day-header h3 {
    font-family: var(--font-heading);
    font-size: 17px;
    font-weight: 600;
    color: var(--color-dark);
    margin: 0;
}

.day-header h3 sup {
    font-size: 10px;
}

.day-schedule {
    padding: 8px 0;
}

.schedule-item {
    display: flex;
    gap: 20px;
    padding: 16px 32px;
    transition: background var(--transition-fast);
    border-left: 3px solid transparent;
}

.schedule-item:hover {
    background: rgba(0,0,0,0.015);
}

.schedule-item.schedule-break {
    opacity: 0.5;
    padding: 10px 32px;
}

.schedule-item.schedule-social {
    border-left-color: var(--color-accent);
    background: rgba(11,180,170,0.02);
}

.sched-time {
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    min-width: 100px;
    padding-top: 2px;
    flex-shrink: 0;
}

.sched-content h4 {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-dark);
    margin: 0 0 4px;
}

.sched-content p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin: 0;
}

.sched-badge {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 5px;
    margin-bottom: 6px;
}

.badge-plenary { background: rgba(11,180,170,0.1); color: var(--color-accent); }
.badge-parallel { background: rgba(74,144,217,0.1); color: #4a90d9; }
.badge-social { background: rgba(232,101,43,0.1); color: var(--color-orange); }

.session-tracks {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.session-tracks span {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    padding: 4px 12px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
}

@media (max-width: 768px) {
    .programme-days { grid-template-columns: 1fr; }
    .schedule-item { padding: 12px 20px; gap: 14px; }
    .sched-time { min-width: 80px; font-size: 11px; }
    .day-header { padding: 20px; }
    .session-tracks { flex-wrap: wrap; }
}

/* --- Submission --- */
.section-submission {
    background: var(--color-bg);
}

.submission-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.submission-lead {
    font-size: 17px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.req-card {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--color-white);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    margin-bottom: 16px;
    transition: all var(--transition);
}

.req-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(11,180,170,0.2);
    transform: translateX(4px);
}

.req-number {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    color: var(--color-accent);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(11,180,170,0.08);
    border-radius: 10px;
    flex-shrink: 0;
}

.req-text h4 {
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.req-text p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* --- Registration / Pricing --- */
.section-registration {
    background: var(--color-dark);
    position: relative;
    overflow: hidden;
}

.section-registration::before {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(11,180,170,0.06) 0%, transparent 70%);
    pointer-events: none;
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto 40px;
}

.pricing-card {
    position: relative;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    padding: 44px 36px;
    transition: all var(--transition);
}

.pricing-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255,255,255,0.15);
}

.pricing-featured {
    border-color: rgba(11, 180, 170, 0.3);
    background: rgba(11, 180, 170, 0.06);
}

.pricing-featured:hover {
    border-color: rgba(11, 180, 170, 0.5);
    box-shadow: 0 20px 60px rgba(11,180,170,0.15);
}

.pricing-ribbon {
    position: absolute;
    top: 20px;
    right: 24px;
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-dark);
    background: var(--color-accent);
    padding: 4px 14px;
    border-radius: 6px;
}

.pricing-title {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 6px;
}

.pricing-deadline {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    margin-bottom: 32px;
}

.pricing-options {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.pricing-option {
    flex: 1;
    text-align: center;
}

.pricing-amount {
    display: block;
    font-family: var(--font-heading);
    font-size: 38px;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1;
    margin-bottom: 8px;
}

.pricing-type {
    font-size: 12px;
    color: rgba(255,255,255,0.45);
    line-height: 1.4;
}

.pricing-divider {
    width: 1px;
    height: 60px;
    background: rgba(255,255,255,0.1);
    flex-shrink: 0;
}

.pricing-features {
    list-style: none;
    padding: 0;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: rgba(255,255,255,0.55);
}

.pricing-features li::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
}

.membership-note {
    text-align: center;
    font-size: 14px;
    color: rgba(255,255,255,0.4);
}

.membership-note a {
    color: var(--color-accent);
    font-weight: 600;
}

/* --- Committees --- */
.section-committees {
    background: var(--color-bg);
}

.committees-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.committee-block {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 36px;
    border: 1px solid var(--color-border);
}

.committee-title-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--color-accent);
    color: var(--color-text-secondary);
}

.committee-title-bar h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-dark);
}

.committee-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.member-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px 12px;
    border-radius: 10px;
    transition: background var(--transition-fast);
}

.member-row:hover {
    background: var(--color-bg);
}

.member-avatar {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-muted);
    flex-shrink: 0;
    letter-spacing: 0.5px;
}

.member-avatar.highlight {
    background: rgba(11,180,170,0.1);
    color: var(--color-accent);
}

.member-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.member-info strong {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-dark);
}

.member-info span {
    font-size: 12px;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


/* --- Contact --- */
.section-contact {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.contact-email-link {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-accent);
    padding: 18px 32px;
    background: rgba(11,180,170,0.06);
    border: 1px solid rgba(11,180,170,0.2);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.contact-email-link:hover {
    background: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(11,180,170,0.25);
}

.contact-email-link svg {
    flex-shrink: 0;
}

.contact-emails {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-email-sm {
    font-size: 15px;
    padding: 14px 24px;
    background: transparent;
    border-color: rgba(11,180,170,0.12);
}

.contact-email-sm:hover {
    background: rgba(11,180,170,0.06);
    border-color: rgba(11,180,170,0.3);
    color: var(--color-accent);
    transform: none;
    box-shadow: none;
}

.organized-label {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.org-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.org-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px;
    background: var(--color-bg);
    border-radius: 14px;
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.org-card:hover {
    border-color: rgba(11,180,170,0.2);
    box-shadow: var(--shadow-sm);
}

.org-icon {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.5px;
}

.org-card span:last-child {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* --- Footer --- */
.site-footer {
    background: var(--color-dark);
    padding: 64px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255,255,255,0.35);
    line-height: 1.6;
}

.footer-links h4 {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    color: rgba(255,255,255,0.6);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.35);
    padding: 6px 0;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.25);
}

.footer-bottom a {
    color: rgba(255,255,255,0.25);
}

.footer-bottom a:hover {
    color: var(--color-accent);
}

/* --- Floating Registration Button --- */
.floating-reg {
    position: fixed;
    right: -4px;
    top: 50%;
    transform: translateY(-50%) translateX(0);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 20px 18px;
    background: var(--color-orange);
    color: var(--color-white);
    border-radius: 16px 0 0 16px;
    text-decoration: none;
    box-shadow: -4px 4px 24px rgba(232, 101, 43, 0.35);
    transition: all var(--transition);
    writing-mode: horizontal-tb;
    opacity: 0;
    pointer-events: none;
}

.floating-reg.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0);
}

.floating-reg:hover {
    right: 0;
    padding-right: 24px;
    background: var(--color-orange-hover);
    color: var(--color-white);
    box-shadow: -6px 6px 32px rgba(232, 101, 43, 0.45);
}

.floating-reg svg {
    flex-shrink: 0;
}

.floating-reg-text {
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    white-space: nowrap;
}

.floating-reg-price {
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 500;
    opacity: 0.8;
    white-space: nowrap;
    background: rgba(0,0,0,0.15);
    padding: 3px 10px;
    border-radius: 6px;
}

/* --- Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .objectives-grid { grid-template-columns: repeat(2, 1fr); }
    .timeline { flex-wrap: wrap; gap: 16px; justify-content: center; }
    .timeline-track { display: none; }
    .timeline-card { max-width: 160px; }
    .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .container { padding: 0 24px; }
    .section { padding: 80px 0; }

    .menu-toggle { display: flex; }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        height: 100dvh;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 4px;
        transition: right var(--transition);
        padding: 80px 24px 40px;
        z-index: 999;
        overflow-y: auto;
    }

    .main-nav.open { right: 0; }

    .main-nav a {
        font-size: 17px;
        padding: 14px 24px;
        width: 100%;
        text-align: center;
        border-radius: 12px;
        color: rgba(255,255,255,0.8);
    }

    .main-nav a:hover,
    .main-nav a:active {
        background: rgba(255,255,255,0.06);
        color: var(--color-white);
    }

    .main-nav .nav-cta {
        margin-left: 0;
        margin-top: 16px;
        background: var(--color-orange);
        color: var(--color-white) !important;
    }

    /* Floating reg - bottom bar on mobile */
    .floating-reg {
        right: auto;
        left: 0;
        right: 0;
        top: auto;
        bottom: 0;
        transform: translateY(100%);
        flex-direction: row;
        border-radius: 0;
        padding: 14px 24px;
        gap: 12px;
        justify-content: center;
        width: 100%;
        box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
    }

    .floating-reg.visible {
        transform: translateY(0);
    }

    .floating-reg:hover {
        right: 0;
        padding-right: 24px;
    }

    .about-layout,
    .submission-layout,
    .contact-layout,
    .committees-wrapper,
    .topics-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .about-layout { gap: 40px; }
    .submission-layout { gap: 48px; }

    .objectives-grid { grid-template-columns: 1fr; }

    /* Location showcase mobile */
    .location-images { grid-template-columns: 1fr; }
    .loc-img-side { display: none; }
    .section-location { height: 70vh; min-height: 480px; }
    .section-location h2 { font-size: 32px; }
    .loc-details { gap: 16px; }

    .stats-grid { flex-wrap: wrap; }
    .stat-item { flex: 0 0 50%; }
    .stat-divider { display: none; }

    .hero-meta { flex-direction: column; align-items: center; }
    .meta-card { width: 100%; max-width: 300px; }

    .org-cards { grid-template-columns: 1fr; }

    .footer-top { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

    .timeline { flex-direction: column; align-items: center; }
    .timeline-card { max-width: 240px; }
}

@media (max-width: 480px) {
    .container { padding: 0 18px; }
    .section { padding: 64px 0; }
    .section-header-center { margin-bottom: 40px; }
    .hero h1 { font-size: 28px; }
    .pricing-card { padding: 28px 24px; }
    .pricing-options { flex-direction: column; gap: 20px; }
    .pricing-divider { width: 60px; height: 1px; }
    .committee-block { padding: 24px; }
}