:root {
    --bg-main: #0B0F19;
    --bg-darker: #05080f;
    --bg-glass: rgba(18, 25, 43, 0.6);
    --bg-glass-hover: rgba(30, 42, 70, 0.8);
    
    --primary: #00FF66; /* Neon Green from Flyer */
    --primary-glow: rgba(0, 255, 102, 0.4);
    --secondary: #00D2FF; /* Neon Blue */
    
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --text-dark: #0f172a;
    
    --border-glass: rgba(255, 255, 255, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}

[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-darker: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.8);
    --bg-glass-hover: rgba(255, 255, 255, 1);
    
    --primary: #00b347; /* Slightly darker green for light mode contrast */
    --primary-glow: rgba(0, 179, 71, 0.2);
    --secondary: #0088aa; 
    
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-dark: #f8fafc; /* For primary buttons */
    
    --border-glass: rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.bg-darker {
    background-color: var(--bg-darker);
}

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

.highlight {
    color: var(--primary);
}

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

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }
.block { display: block; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    border: none;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-dark);
}

.btn-primary:hover {
    background: #00cc52;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--primary-glow);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--text-dark);
}

.btn-secondary:hover {
    background: #00a8cc;
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: rgba(0, 255, 102, 0.1);
    transform: translateY(-2px);
}

.btn-text {
    background: transparent;
    color: var(--text-main);
}

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

.glow-effect {
    box-shadow: 0 0 20px var(--primary-glow);
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0% { box-shadow: 0 0 10px var(--primary-glow); }
    50% { box-shadow: 0 0 25px rgba(0, 255, 102, 0.6); }
    100% { box-shadow: 0 0 10px var(--primary-glow); }
}

/* Glass Panel */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
}

.glass-panel:hover {
    background: var(--bg-glass-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Section Header */
.section-header {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.header-line {
    width: 60px;
    height: 4px;
    background: var(--primary);
    margin: 0 auto;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(11, 15, 25, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-glass);
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.theme-toggle-btn:hover {
    color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
    overflow: hidden;
}

.hero-bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 255, 102, 0.05) 0%, var(--bg-main) 70%);
    z-index: -2;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--secondary);
    margin-bottom: 2rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-main);
    margin-bottom: 1.5rem;
}

.hero-theme {
    font-size: 1.125rem;
    color: var(--primary);
    font-style: italic;
    margin-bottom: 2rem;
}

.hero-details {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.detail-item {
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.card-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.about-card p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Focus Areas */
.focus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.focus-item {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    font-weight: 600;
    transition: var(--transition);
}

.focus-item i {
    font-size: 1.5rem;
    color: var(--secondary);
}

.focus-item:hover {
    background: var(--bg-glass-hover);
    transform: translateY(-5px);
    border-color: var(--secondary);
}

/* Why Attend */
.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reason-card {
    display: flex;
    gap: 1.5rem;
    background: var(--bg-glass);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
    transition: var(--transition);
}

.reason-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -10px rgba(0, 255, 102, 0.1);
}

.reason-icon {
    font-size: 2rem;
    color: var(--primary);
    background: rgba(0, 255, 102, 0.1);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.reason-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Conference Topics */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.topic-card {
    background: var(--bg-main);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--radius);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.topic-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary);
    transform: scaleY(0);
    transition: var(--transition);
    transform-origin: bottom;
}

.topic-card:hover::before {
    transform: scaleY(1);
}

.topic-card:hover {
    background: var(--bg-glass);
    transform: translateY(-5px);
}

.topic-card h4 {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.topic-card ul {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.topic-card ul li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.topic-card ul li::before {
    content: '•';
    color: var(--primary);
    font-weight: bold;
}

/* Who Should Attend */
.audience-section {
    position: relative;
    overflow: hidden;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.tag {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary);
    color: var(--text-dark);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* Stats / Highlights */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    padding: 2rem 1.5rem;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--secondary);
    background: var(--bg-glass-hover);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary);
    font-family: 'Outfit', sans-serif;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.stat-label {
    font-weight: 600;
    color: var(--text-main);
}

/* Speakers */
.speakers-placeholder {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: -1rem;
    margin-top: 3rem;
}

.speaker-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: #1e293b;
    border: 3px solid var(--bg-darker);
    margin-left: -1rem;
    position: relative;
}

.speaker-avatar:first-child {
    margin-left: 0;
}

/* Exhibition & Sponsors */
.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.exhibit-list {
    margin: 1.5rem 0;
}

.exhibit-list li {
    margin-bottom: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.exhibit-list li i {
    color: var(--primary);
}

.sponsor-tiers {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1.5rem 0;
}

.tier {
    font-size: 0.85rem;
    padding: 0.3rem 0.8rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 4px;
}

.benefit-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.btag {
    font-size: 0.8rem;
    color: var(--primary);
    background: rgba(0,255,102,0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* Agenda */
.tabs-container {
    max-width: 900px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    font-weight: 600;
    padding: 1rem 2rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.35rem;
    top: 0.25rem;
    width: 1rem;
    height: 1rem;
    background: var(--bg-darker);
    border: 2px solid var(--primary);
    border-radius: 50%;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.time {
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.event-details h4 {
    margin-bottom: 0.5rem;
}

.event-details p {
    color: var(--text-muted);
}

/* Registration */
.reg-categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 3rem;
}

.reg-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    width: 220px;
    transition: var(--transition);
}

.reg-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.price-tag {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin: 1rem 0;
}

/* Accordion FAQs */
.accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--bg-main);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.accordion-header {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: left;
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.accordion-header:hover {
    color: var(--primary);
}

.accordion-header i {
    transition: transform 0.3s ease;
}

.accordion-header.active i {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-content p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-muted);
}

/* Footer */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-glass);
    padding-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}

.contact-list li i {
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--text-dark);
}

.footer-bottom {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Media Queries */
@media (max-width: 992px) {
    .hero-title { font-size: 3.5rem; }
    .split-layout { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links, .nav-btn { display: none; }
    .mobile-menu-btn { display: block; }
    
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.25rem; }
    .hero-details { flex-direction: column; gap: 1rem; }
    
    .about-grid { grid-template-columns: 1fr; }
    
    .section { padding: 4rem 0; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
}