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

:root {
    --primary-dark: #0f1419;
    --secondary-dark: #1a1f2e;
    --tertiary-dark: #252d3d;
    --card-bg: #2a3142;
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-purple: #8b5cf6;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border-subtle: rgba(148, 163, 184, 0.08);
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #0f1419 100%);
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px -1px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 12px 24px -3px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 24px 48px -5px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(6, 182, 212, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--primary-dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.05); opacity: 0.5; }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Navigation */
.navbar {
    background: rgba(15, 20, 25, 0.9);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
    transition: color var(--transition-fast);
}

.nav-brand:hover {
    color: var(--accent-cyan);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-base);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-primary);
}

.btn-schedule {
    padding: 10px 24px;
    background: var(--gradient-accent);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-base);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
}

.btn-schedule:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.35);
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--spacing-2xl) 0 100px;
    text-align: center;
    overflow: hidden;
    background: var(--gradient-primary);
}

.hero-bg-animation {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 70% 70%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    animation: pulse 20s ease-in-out infinite;
}

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

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Buttons */
.btn {
    padding: 14px 32px;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    display: inline-block;
    cursor: pointer;
    border: none;
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(6, 182, 212, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
}

/* Stats Section */
.stats-section {
    background: var(--secondary-dark);
    padding: var(--spacing-2xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(6, 182, 212, 0.3);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Sections */
section {
    padding: var(--spacing-2xl) 0;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Intro Section */
.intro-section {
    background: var(--secondary-dark);
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.intro-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Conference Section */
.conference-section {
    background: var(--primary-dark);
}

.conference-grid {
    max-width: 900px;
    margin: 0 auto;
}

.conference-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.conference-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(6, 182, 212, 0.3);
}

.conference-image-wrapper {
    position: relative;
    overflow: hidden;
}

.conference-image-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(15, 20, 25, 0.8) 100%);
}

.conference-card img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.conference-card:hover img {
    transform: scale(1.05);
}

.conference-info {
    padding: var(--spacing-xl);
}

.conference-info h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--accent-cyan);
    font-weight: 700;
}

.conference-info p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1.05rem;
}

/* Services Section */
.services-preview {
    background: var(--secondary-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.service-card {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(6, 182, 212, 0.3);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 20px rgba(6, 182, 212, 0.25);
    animation: float 3s ease-in-out infinite;
}

.service-icon svg {
    color: var(--text-primary);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap var(--transition-fast);
}

.service-link:hover {
    gap: 1rem;
}

/* Testimonials */
.testimonial-section {
    background: var(--primary-dark);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.testimonial-card {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(6, 182, 212, 0.2);
}

.quote-icon {
    color: var(--accent-cyan);
    opacity: 0.5;
    margin-bottom: 1rem;
}

.testimonial-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-name {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.author-title {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

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

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    background: var(--primary-dark);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-brand:hover {
    color: var(--accent-cyan);
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
}

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

.footer-contact a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    transition: opacity var(--transition-fast);
}

.footer-contact a:hover {
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-subtle);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero h1 {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .section-header h2, .cta-section h2 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .conference-card img {
        height: 300px;
    }
    
    section {
        padding: var(--spacing-xl) 0;
    }
}