/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    color: #2D3748;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: #4A5568;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: #4A5568;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
}

.nav-menu a:hover {
    color: #667eea;
}

.register-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    padding: 10px 24px;
    border-radius: 6px;
    margin-left: 0.5rem;
}

/* Dropdown Menu */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-toggle i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 0.5rem 0;
    min-width: 250px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    border: 1px solid #E5E7EB;
}

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

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #374151 !important;
    text-decoration: none;
    transition: all 0.2s ease;
}

.dropdown-menu a:hover {
    background: #F3F4F6;
    color: #667eea !important;
}

.dropdown-menu i {
    font-size: 1rem;
    width: 16px;
    color: #6B7280;
}

.dropdown-menu a:hover i {
    color: #667eea;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 85vh;
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    position: relative;
    color: white;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 20px;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-details {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.detail-item i {
    font-size: 1.2rem;
    color: #FFD93D;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-buttons .btn-secondary {
    border-color: white;
    color: white;
}

.hero-buttons .btn-secondary:hover {
    background: white;
    color: #667eea;
}

/* Countdown */
.countdown-container {
    text-align: center;
}

.countdown-container h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.countdown {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.time-unit {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem 1rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.time-unit .number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #FFD93D;
}

.time-unit .label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header p {
    font-size: 1.2rem;
    color: #6B7280;
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: #F8FAFC;
}

.about-grid {
    display: none;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.about-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
}

.about-card i {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat h3 {
    font-size: 3rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.stat p {
    color: #6B7280;
    font-weight: 500;
}

/* Banner Section */
.banner-section {
    padding: 4rem 0;
    overflow: hidden;
}

.banner-container {
    max-width: 1390px;
    height: 380px;
    margin: 0 auto;
    display: block;
    padding: 0 2rem;
    position: relative;
}

.banner-content {
    color: white;
    z-index: 2;
}

.banner-content h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.banner-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.5;
}

.banner-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.banner-stat h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #FFD93D;
}

.banner-stat p {
    font-size: 1rem;
    margin: 0;
    opacity: 0.9;
}

.banner-cta {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

.banner-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
    background: #f8f9ff;
}

.banner-slider {
    position: relative;
    height: 100%;
    width: 100%;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-nav {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.7);
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-dot.active,
.nav-dot:hover {
    background: white;
    border-color: white;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #333;
}

.slider-btn:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.slider-btn.prev {
    left: 20px;
}

.slider-btn.next {
    right: 20px;
}

/* Banner Section Responsive */
@media (max-width: 1200px) {
    .banner-container {
        max-width: 100%;
        padding: 0 1.5rem;
    }
}

@media (max-width: 768px) {
    .banner-section {
        padding: 3rem 0;
    }
    
    .banner-container {
        height: 250px;
        padding: 0 1rem;
    }
    
    .slider-btn {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
    
    .slider-btn.prev {
        left: 10px;
    }
    
    .slider-btn.next {
        right: 10px;
    }
    
    .nav-dot {
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 480px) {
    .banner-content h2 {
        font-size: 1.8rem;
    }
    
    .banner-content p {
        font-size: 1rem;
    }
    
    .banner-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .banner-stat {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 1rem;
    }
    
    .banner-stat h3 {
        font-size: 1.8rem;
        margin-bottom: 0;
    }
    
    .banner-stat p {
        margin: 0;
    }
    
    .banner-cta {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
    
    .banner-image {
        height: 200px;
    }
}

/* Speakers Section */
.speakers {
    padding: 6rem 0;
}

.speaker-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 2px solid #E5E7EB;
    padding: 8px 20px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    border-color: #667eea;
    background: #667eea;
    color: white;
}

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

.speaker-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.speaker-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.speaker-image {
    height: 250px;
    overflow: hidden;
}

.speaker-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-info {
    padding: 1.5rem;
}

.speaker-title {
    color: #667eea;
    font-weight: 500;
    margin-bottom: 1rem;
}

.speaker-bio {
    font-size: 0.9rem;
    color: #6B7280;
    margin-bottom: 1rem;
}

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

.speaker-social a {
    color: #6B7280;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.speaker-social a:hover {
    color: #667eea;
}

/* Schedule Section */
.schedule {
    padding: 6rem 0;
    background: #F8FAFC;
}

.schedule-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.day-schedule {
    margin-bottom: 3rem;
}

.day-schedule h3 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: #667eea;
}

.schedule-timeline {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.schedule-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 2rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid #E5E7EB;
}

.schedule-item:last-child {
    border-bottom: none;
}

.time {
    font-weight: 600;
    color: #667eea;
    font-size: 0.9rem;
}

.session h4 {
    margin-bottom: 0.5rem;
}

.session p {
    color: #6B7280;
    margin-bottom: 0.5rem;
}

.track {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    background: #F3F4F6;
    color: #6B7280;
}

.track.keynote {
    background: #FEF3C7;
    color: #92400E;
}

.track.policy {
    background: #DBEAFE;
    color: #1E40AF;
}

.track.innovation {
    background: #D1FAE5;
    color: #065F46;
}

.track.community {
    background: #FCE7F3;
    color: #BE185D;
}

/* Registration Section */
.registration {
    padding: 6rem 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.pricing-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform 0.3s ease;
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.pricing-card.featured {
    border-color: #667eea;
    transform: scale(1.05);
}

.price-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    text-align: center;
}

.price-header h3 {
    margin-bottom: 1rem;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.features {
    padding: 2rem;
    list-style: none;
}

.features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: #4A5568;
}

.features i {
    color: #10B981;
}

.pricing-card .btn {
    width: calc(100% - 4rem);
    margin: 0 2rem 2rem;
}

.registration-note {
    text-align: center;
    background: #F8FAFC;
    padding: 2rem;
    border-radius: 12px;
}

/* Venue Section */
.venue {
    padding: 6rem 0;
    background: #F8FAFC;
}

.venue-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.venue-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.venue-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #E5E7EB;
}

.venue-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.venue-card h3 {
    color: #667eea;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
}

.venue-card h3 i {
    font-size: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.venue-card h4 {
    margin-bottom: 1rem;
    color: #1F2937;
    font-size: 1.1rem;
}

.venue-card p {
    color: #4B5563;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.hotel ul,
.travel-info ul {
    list-style: none;
    margin: 1rem 0;
}

.hotel li,
.travel-info li {
    margin-bottom: 0.75rem;
    color: #4B5563;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.hotel li strong,
.travel-info li strong {
    color: #1F2937;
    min-width: 120px;
}

.map-container {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #E5E7EB;
    height: 100%;
}

.map-container iframe {
    width: 100%;
    height: 100%;
    min-height: 500px;
    border: none;
}

.venue-card .btn {
    width: 100%;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .venue-grid {
        grid-template-columns: 1fr;
    }
    
    .venue-info {
        grid-template-columns: 1fr;
    }
    
    .map-container {
        height: 400px;
    }
    
    .map-container iframe {
        min-height: 400px;
    }
}

/* Sponsors Section */
.sponsors {
    padding: 6rem 0;
}

.sponsor-tier {
    margin-bottom: 3rem;
}

.sponsor-tier h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: #667eea;
}

.sponsor-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.sponsor-logo {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.sponsor-logo:hover {
    transform: translateY(-2px);
}

.sponsor-logo.platinum {
    padding: 1.5rem;
}

.sponsor-logo img {
    max-width: 100%;
    height: auto;
}

.sponsorship-cta {
    text-align: center;
    background: #F8FAFC;
    padding: 3rem;
    border-radius: 16px;
    margin-top: 3rem;
}

/* FAQ Section */
.faq {
    padding: 6rem 0;
    background: #F8FAFC;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: #F8FAFC;
}

.faq-question h3 {
    margin: 0;
    font-size: 1.1rem;
}

.faq-question i {
    transition: transform 0.3s ease;
    color: #667eea;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.5rem;
    max-height: 200px;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: #667eea;
    margin-top: 0.5rem;
}

.contact-item h3 {
    margin-bottom: 0.5rem;
}

.contact-item a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #764ba2;
    text-decoration: underline;
}

.social-links {
    margin-top: 2rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: #667eea;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.social-icons a:hover {
    transform: translateY(-2px);
}

/* Contact Form */
.contact-form {
    background: #F8FAFC;
    padding: 2rem;
    border-radius: 16px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #374151;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #E5E7EB;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background: #1F2937;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #D1D5DB;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: #374151;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.footer-social a:hover {
    background: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9CA3AF;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 0.5rem 0;
        z-index: 1000;
    }
    
    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 0.25rem 0;
    }

    .dropdown {
        position: relative;
    }

    .dropdown-menu {
        position: static;
        background: #F8FAFC;
        box-shadow: none;
        padding: 0.25rem 0;
        margin: 0.25rem 0;
        display: none;
        width: 100%;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .dropdown.active .dropdown-menu {
        display: block;
    }

    .dropdown-toggle {
        justify-content: center;
        padding: 0.5rem 1rem;
        width: 100%;
    }

    .dropdown-toggle i {
        margin-left: 0.5rem;
        transition: transform 0.3s ease;
    }

    .dropdown.active .dropdown-toggle i {
        transform: rotate(180deg);
    }

    .dropdown-menu li {
        margin: 0;
    }

    .dropdown-menu a {
        padding: 0.5rem 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        color: #4B5563;
    }

    .dropdown-menu a:hover {
        background: #E5E7EB;
    }

    .dropdown-menu i {
        font-size: 1rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-details {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .countdown {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .time-unit {
        padding: 1rem;
    }
    
    .time-unit .number {
        font-size: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .speakers-grid {
        grid-template-columns: 1fr;
    }
    
    .schedule-item {
        grid-template-columns: 1fr;
        gap: 1rem;
        text-align: center;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .venue-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 1rem;
    }
    
    .countdown {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .speaker-filters,
    .schedule-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .sponsor-logos {
        flex-direction: column;
        align-items: center;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Hidden class for filtering */
.hidden {
    display: none !important;
}

/* Hide schedule section */
#schedule {
    display: none !important;
}

/* Hide sponsors section */
#sponsors {
    display: none !important;
}

/* Important Dates Section */
.important-dates {
    background: white;
    padding: 6rem 0;
    position: relative;
}

.timeline-container {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline-line {
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 50%, #E5E7EB 100%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 80px;
    opacity: 0;
    transform: translateX(-30px);
    animation: slideInLeft 0.6s ease-out forwards;
}

.timeline-item:nth-child(even) {
    animation-delay: 0.2s;
}

.timeline-item:nth-child(odd) {
    animation-delay: 0.1s;
}

.timeline-item.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
    border-radius: 16px;
    padding: 2rem 2rem 2rem 80px;
    margin-left: -20px;
    border: 2px solid rgba(102, 126, 234, 0.2);
}

.timeline-marker {
    position: absolute;
    left: -48px;
    top: 0;
    width: 60px;
    height: 60px;
    background: white;
    border: 3px solid #667eea;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: all 0.3s ease;
}

.timeline-item[data-status="past"] .timeline-marker {
    background: #10B981;
    border-color: #10B981;
    color: white;
}

.timeline-item[data-status="active"] .timeline-marker {
    background: #667eea;
    border-color: #667eea;
    color: white;
    animation: pulse 2s infinite;
}

.timeline-item[data-status="upcoming"] .timeline-marker {
    background: #F3F4F6;
    border-color: #9CA3AF;
    color: #6B7280;
}

.timeline-item.featured .timeline-marker {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: #667eea;
    color: white;
    width: 70px;
    height: 70px;
    left: -53px;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.timeline-marker i {
    font-size: 1.5rem;
}

.timeline-item.featured .timeline-marker i {
    font-size: 1.8rem;
}

.timeline-content {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.timeline-item:hover .timeline-content {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.timeline-item[data-status="past"] .timeline-content {
    border-left-color: #10B981;
}

.timeline-item[data-status="active"] .timeline-content {
    border-left-color: #667eea;
}

.timeline-item[data-status="upcoming"] .timeline-content {
    border-left-color: #9CA3AF;
}

.timeline-item.featured .timeline-content {
    border-left-color: #667eea;
    background: white;
}

.timeline-date {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.timeline-date .date {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1F2937;
}

.timeline-date .status {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status.past {
    background: #D1FAE5;
    color: #065F46;
}

.status.active {
    background: #DBEAFE;
    color: #1E40AF;
}

.status.upcoming {
    background: #F3F4F6;
    color: #6B7280;
}

.status.featured {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.timeline-content h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: #1F2937;
}

.timeline-content p {
    color: #6B7280;
    margin-bottom: 1.2rem;
    line-height: 1.6;
}

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

.action-btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.action-btn.primary {
    background: linear-gradient(135deg, #F59E0B, #D97706);
}

.action-icon {
    color: #9CA3AF;
    font-size: 1.2rem;
}

.countdown-mini {
    margin-top: 1rem;
    padding: 1rem;
    background: #F8FAFC;
    border-radius: 8px;
    text-align: center;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.countdown-number {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.countdown-label {
    font-size: 0.9rem;
    color: #6B7280;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.event-highlights {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(102, 126, 234, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #667eea;
    font-weight: 500;
}

.dates-cta {
    text-align: center;
    margin-top: 4rem;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
    border-radius: 16px;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.dates-cta h3 {
    color: #1F2937;
    margin-bottom: 1rem;
}

.dates-cta p {
    color: #6B7280;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Animations */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
    }
    70% {
        box-shadow: 0 0 0 15px rgba(102, 126, 234, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
    }
}

/* Responsive Design for Important Dates */
@media (max-width: 768px) {
    .timeline-container {
        padding-left: 1rem;
    }
    
    .timeline-line {
        left: 20px;
    }
    
    .timeline-item {
        padding-left: 60px;
        margin-bottom: 2rem;
    }
    
    .timeline-item.featured {
        padding: 1.5rem 1rem 1.5rem 60px;
        margin-left: -10px;
    }
    
    .timeline-marker {
        width: 40px;
        height: 40px;
        left: -28px;
    }
    
    .timeline-item.featured .timeline-marker {
        width: 50px;
        height: 50px;
        left: -33px;
    }
    
    .timeline-marker i {
        font-size: 1rem;
    }
    
    .timeline-item.featured .timeline-marker i {
        font-size: 1.3rem;
    }
    
    .timeline-date {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .event-highlights {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        min-width: 200px;
    }
}

@media (max-width: 480px) {
    .important-dates {
        padding: 4rem 0;
    }
    
    .timeline-content {
        padding: 1rem;
    }
    
    .countdown-mini {
        padding: 0.8rem;
    }
    
    .countdown-number {
        font-size: 1.5rem;
    }
    
    .dates-cta {
        padding: 2rem 1rem;
    }
}

/* Catalog Section */
.catalog {
    background: #F9FAFB;
    padding: 6rem 0;
}

.catalog-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.catalog-filter-btn {
    padding: 12px 24px;
    border: 2px solid #E5E7EB;
    background: white;
    color: #6B7280;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.catalog-filter-btn.active,
.catalog-filter-btn:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.catalog-item {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.catalog-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.catalog-cover {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.catalog-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.catalog-item:hover .catalog-cover img {
    transform: scale(1.05);
}

.catalog-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(102, 126, 234, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.catalog-item:hover .catalog-overlay {
    opacity: 1;
}

.catalog-overlay i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.catalog-overlay span {
    font-size: 1.2rem;
    font-weight: 600;
}

.catalog-info {
    padding: 1.5rem;
}

.catalog-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: #1F2937;
    line-height: 1.4;
}

.catalog-info p {
    color: #6B7280;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.catalog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #F3F4F6;
}

.catalog-pages {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #6B7280;
    font-size: 0.9rem;
}

.catalog-pages i {
    color: #9CA3AF;
}

.catalog-category {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.catalog-cta {
    text-align: center;
    background: white;
    padding: 3rem 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.catalog-cta h3 {
    color: #1F2937;
    margin-bottom: 1rem;
}

.catalog-cta p {
    color: #6B7280;
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* Responsive Design for Catalog */
@media (max-width: 768px) {
    .catalog-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .catalog-filter-btn {
        min-width: 200px;
        text-align: center;
    }
    
    .catalog-grid {
        grid-template-columns: 1fr;
    }
    
    .catalog-meta {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .catalog {
        padding: 4rem 0;
    }
    
    .catalog-cover {
        height: 250px;
    }
    
    .catalog-overlay i {
        font-size: 2rem;
    }
    
    .catalog-overlay span {
        font-size: 1rem;
    }
    
    .catalog-cta {
        padding: 2rem 1rem;
    }
}