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

:root {
    /* Dark Green Color Palette */
    --primary-50: #ecfdf5;
    --primary-100: #d1fae5;
    --primary-200: #a7f3d0;
    --primary-300: #6ee7b7;
    --primary-400: #34d399;
    --primary-500: #10b981;
    --primary-600: #059669;
    --primary-700: #047857;
    --primary-800: #065f46;
    --primary-900: #064e3b;
    --primary-950: #022c22;

    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --gray-950: #030712;

    /* Accent Colors */
    --accent-gold: #f59e0b;
    --accent-emerald: #10b981;
    --accent-teal: #14b8a6;

    /* Semantic Colors - Dark Mode (Default) */
    --bg-primary: #0a0f0d;
    --bg-secondary: #0d1512;
    --bg-card: rgba(13, 21, 18, 0.8);
    --bg-glass: rgba(6, 78, 59, 0.15);

    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --border-primary: rgba(16, 185, 129, 0.2);
    --border-secondary: rgba(255, 255, 255, 0.1);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #064e3b 0%, #022c22 100%);
    --gradient-accent: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-hero: linear-gradient(180deg, rgba(10, 15, 13, 0) 0%, rgba(10, 15, 13, 0.8) 50%, #0a0f0d 100%);
    --gradient-glow: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.15) 0%, transparent 50%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
    --spacing-4xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.3);
    --shadow-glow-lg: 0 0 80px rgba(16, 185, 129, 0.4);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== Light Mode ===== */
[data-theme="light"] {
    --bg-primary: #f8faf9;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(16, 185, 129, 0.08);

    --text-primary: #064e3b;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;

    --border-primary: rgba(16, 185, 129, 0.3);
    --border-secondary: rgba(0, 0, 0, 0.08);

    --gradient-primary: linear-gradient(135deg, #d1fae5 0%, #ecfdf5 100%);
    --gradient-hero: linear-gradient(180deg, rgba(248, 250, 249, 0) 0%, rgba(248, 250, 249, 0.9) 50%, #f8faf9 100%);
    --gradient-glow: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);

    --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.15);
    --shadow-glow-lg: 0 0 80px rgba(16, 185, 129, 0.2);
}

/* Light mode specific overrides */
[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
}

[data-theme="light"] .hero {
    background:
        linear-gradient(180deg, rgba(209, 250, 229, 0.9) 0%, rgba(236, 253, 245, 0.95) 100%),
        url('https://images.unsplash.com/photo-1568637506950-6d8c9d4e5f88?w=1920&q=80') center/cover no-repeat;
}

[data-theme="light"] .title-line {
    background: linear-gradient(135deg, #064e3b 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .nav-toggle span {
    background: var(--gray-700);
}

[data-theme="light"] .date-card.highlight {
    color: var(--gray-950);
}

[data-theme="light"] .cta-section {
    background: var(--gradient-primary);
}

[data-theme="light"] .stats-section {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
}

[data-theme="light"] .stats-section .stat-number,
[data-theme="light"] .stats-section .stat-label {
    color: #064e3b;
}

[data-theme="light"] .footer {
    background: #064e3b;
    color: #f9fafb;
}

[data-theme="light"] .footer a {
    color: #a7f3d0;
}

[data-theme="light"] .footer h4 {
    color: #34d399;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--gradient-accent);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: var(--transition-base);
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--gray-950);
    transition: var(--transition-base);
}

.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: none;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 13, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-secondary);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 15, 13, 0.95);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-xl);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    height: 47.487px;
}

.nav-logo-img {
    height: 47.487px;
    width: 204px;
    object-fit: contain;
}

.logo-text {
    color: var(--text-primary);
}

.logo-year {
    color: var(--primary-400);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-accent);
    color: var(--gray-950);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-4xl) var(--spacing-xl);
    background:
        linear-gradient(180deg, rgba(6, 78, 59, 0.9) 0%, rgba(2, 44, 34, 0.95) 100%),
        url('https://images.unsplash.com/photo-1568637506950-6d8c9d4e5f88?w=1920&q=80') center/cover no-repeat;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(16, 185, 129, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(2px 2px at 20px 30px, rgba(16, 185, 129, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(16, 185, 129, 0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(16, 185, 129, 0.3), transparent),
        radial-gradient(1px 1px at 160px 120px, rgba(255, 255, 255, 0.2), transparent);
    background-size: 200px 200px;
    animation: particles 20s linear infinite;
    opacity: 0.5;
}

@keyframes particles {
    0% {
        transform: translateY(0);
    }

    100% {
        transform: translateY(-200px);
    }
}

.hero-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: var(--gradient-hero);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-300);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease;
}

.badge-icon {
    font-size: 1.25rem;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.1s both;
}

.title-line {
    display: block;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-300) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title-accent {
    display: block;
    color: var(--primary-400);
    font-size: 0.5em;
    margin: var(--spacing-sm) 0;
    -webkit-text-fill-color: var(--primary-400);
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--primary-400);
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-info {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.info-icon {
    font-size: 1.5rem;
}

.info-divider {
    width: 4px;
    height: 4px;
    background: var(--primary-500);
    border-radius: var(--radius-full);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.875rem;
    animation: fadeInUp 0.6s ease 0.5s both;
}

.scroll-indicator {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-full);
    position: relative;
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-400);
    border-radius: var(--radius-full);
    animation: scroll 1.5s ease infinite;
}

@keyframes scroll {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(12px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* Countdown Timer */
.countdown-wrapper {
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease 0.35s both;
}

.countdown-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.countdown {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    min-width: 80px;
}

.countdown-value {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    color: var(--primary-400);
    line-height: 1;
}

.countdown-unit {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--spacing-xs);
}

/* Hybrid Badge */
.hybrid-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(16, 185, 129, 0.15) 100%);
    border: 1px solid rgba(245, 158, 11, 0.4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: #f59e0b;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.05s both;
}

.hybrid-badge svg {
    color: #f59e0b;
}

@media (max-width: 600px) {
    .countdown-item {
        padding: var(--spacing-md);
        min-width: 60px;
    }

    .countdown-value {
        font-size: 1.5rem;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--gray-950);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-primary);
}

.btn-secondary:hover {
    background: var(--bg-glass);
    border-color: var(--primary-400);
}

.btn-outline {
    background: transparent;
    color: var(--primary-400);
    border: 2px solid var(--primary-600);
}

.btn-outline:hover {
    background: var(--primary-600);
    color: var(--gray-950);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ===== Section Styles ===== */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-3xl);
}

.section-header.center {
    text-align: center;
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    color: var(--primary-400);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-300) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Dates Section ===== */
.dates-section {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.dates-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 400px;
    background: var(--gradient-glow);
    pointer-events: none;
}

.dates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.date-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
}

.date-card:hover {
    border-color: var(--border-primary);
    transform: translateY(-4px);
}

.date-card.highlight {
    background: var(--gradient-accent);
    border-color: transparent;
}

.date-card.highlight .date-label,
.date-card.highlight .date-value {
    color: var(--gray-950);
}

.date-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.date-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.date-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.date-value {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
}

/* ===== Welcome Section ===== */
.welcome-section {
    position: relative;
    overflow: hidden;
}

.welcome-grid {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.welcome-content {
    position: relative;
    z-index: 1;
}

.welcome-text {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

.welcome-text strong {
    color: var(--primary-300);
}

.welcome-signature {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    margin-top: var(--spacing-2xl);
    text-align: left;
}

.signature-avatar {
    width: 80px;
    height: 80px;
    display: block;
    object-fit: cover;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    border: 2px solid var(--primary-500);
}

.signature-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.signature-name {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.125rem;
}

.signature-title {
    color: var(--primary-400);
    font-weight: 500;
}

.signature-role {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.welcome-visual {
    position: relative;
    height: 400px;
}

.visual-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    transition: var(--transition-spring);
}

.visual-card:hover {
    transform: scale(1.05);
    border-color: var(--border-primary);
}

.card-icon {
    font-size: 1.5rem;
}

.card-text {
    font-weight: 500;
    color: var(--text-primary);
}

.card-1 {
    top: 0;
    left: 0;
}

.card-2 {
    top: 30%;
    right: 0;
}

.card-3 {
    bottom: 30%;
    left: 10%;
}

.card-4 {
    bottom: 0;
    right: 10%;
}

/* ===== Topics Preview ===== */
.topics-preview {
    background: var(--bg-secondary);
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.topic-card {
    padding: var(--spacing-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: var(--transition-base);
}

.topic-card:hover {
    border-color: var(--border-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.topic-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.topic-card h3 {
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.topic-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.topics-cta,
.speakers-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

/* ===== Stats Section ===== */
.stats-section {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    pointer-events: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 800;
    color: var(--primary-400);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ===== Speakers Preview ===== */
.speakers-preview {
    position: relative;
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.speaker-card {
    padding: var(--spacing-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: var(--transition-base);
}

.speaker-card:hover {
    border-color: var(--border-primary);
    transform: translateY(-4px);
}

.speaker-avatar {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-accent);
    color: var(--gray-950);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.75rem;
    border-radius: var(--radius-full);
}

.speaker-name {
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.speaker-affiliation {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ===== Venue Preview ===== */
.venue-preview {
    background: var(--bg-secondary);
}

.venue-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.venue-text {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

.venue-locations {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.venue-item {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
}

.venue-day {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-accent);
    color: var(--gray-950);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
}

.venue-item h4 {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.venue-item p {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.venue-map {
    position: relative;
    height: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.map-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-950) 100%);
    color: var(--text-secondary);
    font-size: 1.25rem;
}

.map-icon {
    font-size: 4rem;
}

/* ===== CTA Section ===== */
.cta-section {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}



/* ===== Footer Redesign ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-secondary);
    padding: 80px 0 40px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    margin-bottom: 0.5rem;
    height: 47.487px;
}

.footer-logo-img {
    height: 47.487px;
    width: 204px;
    object-fit: contain;
}

.footer-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-family: var(--font-display);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    color: var(--primary-400);
    transform: translateX(4px);
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

.footer-contact-icon {
    color: var(--primary-400);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-secondary);
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

.page-header {
    padding: calc(var(--spacing-lg) + 80px) 0 var(--spacing-sm);
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glow);
    pointer-events: none;
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-300) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.25rem;
    max-width: 600px;
}

/* ===== Content Sections ===== */
.content-section {
    padding: var(--spacing-xl) 0;
}

.content-section.alt {
    background: var(--bg-secondary);
}

.content-card {
    padding: var(--spacing-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
}

.content-card h3 {
    color: var(--primary-400);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.content-card h4 {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.content-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.content-card li {
    color: var(--text-secondary);
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-xl);
    position: relative;
}

.content-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-400);
}

/* ===== Committee Styles ===== */
.committee-section {
    margin-bottom: var(--spacing-3xl);
}

.committee-section h3 {
    color: var(--primary-400);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-primary);
}

.committee-section h4 {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.committee-members {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.member-item {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
}

.member-item strong {
    color: var(--text-primary);
}

/* ===== Partner Styles ===== */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
    justify-content: center;
    margin-top: 1rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.partners-grid.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    width: fit-content;
}

@media (max-width: 800px) {
    .partners-grid.grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 500px) {
    .partners-grid.grid-4 {
        grid-template-columns: 1fr;
    }
}

.partner-card {
    background: #ffffff;
    padding: 12px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100px;
    width: fit-content;
    min-width: 180px;
    transition: var(--transition-base);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

.partner-card:hover {
    border-color: var(--primary-400);
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.partner-logo {
    max-width: 200px;
    max-height: 76px;
    object-fit: contain;
    /* Removed filter: grayscale(100%) */
    opacity: 1;
    /* Removed opacity: 0.8 */
    transition: var(--transition-base);
}

.partner-card:hover .partner-logo {
    transform: scale(1.05);
}

.partners-section-title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.main-organizer-card {
    background: #ffffff;
    width: fit-content;
    min-width: 180px;
    height: 100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05) !important;
    transition: var(--transition-base);
}

.main-organizer-card:hover {
    border-color: var(--primary-400);
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1) !important;
}

.main-organizer-logo {
    max-width: 200px;
    max-height: 76px;
    object-fit: contain;
    transition: var(--transition-base);
}

@media (max-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 1024px) {

    .welcome-grid,
    .venue-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
    }

    .welcome-visual {
        height: 300px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--spacing-xl);
        border-bottom: 1px solid var(--border-secondary);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }

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

    .nav-cta {
        display: none;
    }

    .hero-title {
        font-size: clamp(2rem, 7vw, 3rem);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .stat-item {
        padding: var(--spacing-md);
    }

    .welcome-visual {
        display: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

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

/* ===== Topics List Styles ===== */
.topics-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    list-style: none;
    padding: 0;
    margin: 0 auto;
    max-width: 1000px;
}

@media (min-width: 768px) {
    .topics-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

.topics-list li {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    transition: var(--transition-base);
}

.topics-list li:hover {
    border-color: var(--primary-400);
    background: var(--bg-glass);
    color: var(--text-primary);
    transform: translateX(5px);
}

[data-theme="light"] .topics-list li {
    background: #ffffff;
    border-color: var(--gray-200);
    color: var(--text-secondary);
}

[data-theme="light"] .topics-list li:hover {
    border-color: var(--primary-400);
    background: var(--primary-50);
    color: var(--primary-700);
}

/* ===== Under Construction Alert ===== */
.construction-alert {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--accent-gold);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) auto;
    max-width: 900px;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    color: var(--text-primary);
}

.construction-icon {
    color: var(--accent-gold);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    margin-top: 2px;
}

.construction-content h4 {
    color: var(--accent-gold);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.construction-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

[data-theme="light"] .construction-alert {
    background: #fffbeb;
    border-color: #fcd34d;
}

[data-theme="light"] .construction-content p {
    color: var(--gray-700);
}


/* ===== Modern Hero Redesign ===== */
.hero-modern {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 60px;
    /* Offset for fixed navbar */
    position: relative;
    overflow: hidden;
    background: var(--bg-primary);
}

.hero-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 15% 50%, rgba(16, 185, 129, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(5, 150, 105, 0.08) 0%, transparent 25%);
    pointer-events: none;
    z-index: 1;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

/* Typography styles */
.hero-badges {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    color: var(--primary-400);
    font-size: 0.875rem;
    font-weight: 600;
}

[data-theme="light"] .hero-pill {
    background: var(--primary-50);
    border-color: var(--primary-200);
    color: var(--primary-700);
}

.hero-modern-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.hero-gradient-text {
    background: linear-gradient(135deg, var(--primary-400) 0%, var(--accent-teal) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-modern-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    justify-content: flex-start;
    align-items: center;
}

/* Glass Card Visual */
.hero-visual {
    position: relative;
    padding: 2rem;
}

.hero-glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

[data-theme="light"] .hero-glass-card {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
}

.timer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
    text-align: center;
}

.timer-box {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem 0.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .timer-box {
    background: #fff;
    border-color: var(--gray-200);
}

.timer-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-400);
    line-height: 1;
    margin-bottom: 0.25rem;
}

[data-theme="light"] .timer-value {
    color: var(--primary-600);
}

.timer-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-decoration {
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: var(--primary-500);
    filter: blur(80px);
    opacity: 0.2;
    border-radius: 50%;
    pointer-events: none;
}

/* Event Details in Card */
.event-detail-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-secondary);
}

[data-theme="light"] .event-detail-row {
    border-bottom-color: var(--gray-200);
}

.detail-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-lg);
    color: var(--primary-400);
}

.detail-text h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.detail-text p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .hero-modern {
        padding-top: 100px;
        height: auto;
        min-height: auto;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }

    .hero-badges {
        justify-content: center;
    }

    .hero-modern-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .event-detail-row {
        text-align: left;
    }
}

/* Utility Classes */
.hover-card:hover {
    border-color: var(--primary-500) !important;
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}