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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    background-color: #ffffff;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: #3b82f6;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text h1 {
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
    line-height: 1.2;
}

.logo-text p {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.2;
}

.navigation {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: #4b5563;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #3b82f6;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3b82f6;
    transition: width 0.3s ease;
}

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

.cta-button {
    background: #3b82f6;
    color: white;
    text-decoration: none;
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background: #4b5563;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    padding: 120px 0 80px;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.conference-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #dbeafe;
    color: #1e40af;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 32px;
}

.conference-badge svg {
    color: #3b82f6;
}

.hero-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 900;
    color: #1f2937;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-title .highlight {
    color: #3b82f6;
}

.hero-subtitle {
    font-size: clamp(20px, 3vw, 28px);
    color: #4b5563;
    margin-bottom: 16px;
    font-weight: 600;
    line-height: 1.3;
}

.hero-description {
    font-size: 18px;
    color: #6b7280;
    margin-bottom: 48px;
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    display: inline-block;
    text-decoration: none;
    text-align: center;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: #3b82f6;
    color: white;
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #4b5563;
    border: 2px solid #d1d5db;
}

.btn-secondary:hover {
    border-color: #3b82f6;
    color: #3b82f6;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 32px;
    max-width: 600px;
    margin: 0 auto;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 900;
    color: #1f2937;
    margin-bottom: 8px;
}

.stat-label {
    color: #6b7280;
    font-size: 14px;
    font-weight: 500;
}

/* Section Styles */
section {
    padding: 80px 0;
}

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

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    color: #1f2937;
    margin-bottom: 16px;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: #3b82f6;
    margin: 0 auto 32px;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* About Section */
.about {
    background: #ffffff;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
    margin-bottom: 64px;
}

.about-text h3 {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 24px;
}

.about-text p {
    color: #4b5563;
    margin-bottom: 24px;
    line-height: 1.7;
    font-size: 16px;
}

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

.feature-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #f3f4f6;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: white;
}

.feature-card.blue .feature-icon {
    background: #3b82f6;
}

.feature-card.green .feature-icon {
    background: #10b981;
}

.feature-card.purple .feature-icon {
    background: #8b5cf6;
}

.feature-card.orange .feature-icon {
    background: #f59e0b;
}

.feature-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 8px;
}

.feature-card p {
    color: #6b7280;
    font-size: 14px;
    line-height: 1.5;
}

/* Topics Section */
.topics {
    background: #f9fafb;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.topic-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #f3f4f6;
    text-align: center;
    transition: all 0.3s ease;
}

.topic-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.topic-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.topic-icon.blue {
    background: #3b82f6;
}

.topic-icon.green {
    background: #10b981;
}

.topic-icon.purple {
    background: #8b5cf6;
}

.topic-icon.orange {
    background: #f59e0b;
}

.topic-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 16px;
}

.topic-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Dates Section */
.dates {
    background: #ffffff;
}

.dates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.date-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    border: 2px solid;
    transition: all 0.3s ease;
}

.date-card.deadline {
    border-color: #fca5a5;
    background: #fef2f2;
}

.date-card.conference {
    border-color: #86efac;
    background: #f0fdf4;
}

.date-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.date-icon {
    margin: 0 auto 24px;
}

.date-card.deadline .date-icon {
    color: #dc2626;
}

.date-card.conference .date-icon {
    color: #16a34a;
}

.date-card h3 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 8px;
}

.date-card.deadline h3 {
    color: #dc2626;
}

.date-card.conference h3 {
    color: #16a34a;
}

.date-card p {
    color: #4b5563;
    font-weight: 600;
    margin-bottom: 16px;
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.deadline-badge {
    background: #fecaca;
    color: #dc2626;
}

.conference-badge {
    background: #bbf7d0;
    color: #16a34a;
}

/* Contact Section */
.contact {
    background: #f9fafb;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 32px;
    margin-bottom: 48px;
}

.contact-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #f3f4f6;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.contact-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
}

.contact-avatar.blue {
    background: #3b82f6;
}

.contact-avatar.green {
    background: #10b981;
}

.contact-avatar.purple {
    background: #8b5cf6;
}

.contact-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 8px;
}

.role {
    color: #6b7280;
    font-size: 14px;
    margin-bottom: 16px;
}

.email {
    color: #3b82f6;
    text-decoration: none;
    font-weight: 600;
    display: block;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.email:hover {
    color: #2563eb;
}

.phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #6b7280;
    font-size: 14px;
}

.phone svg {
    color: #3b82f6;
}

.venue-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #f3f4f6;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.venue-icon {
    color: #f59e0b;
    margin: 0 auto 24px;
}

.venue-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 16px;
}

.venue-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: #f59e0b;
    margin-bottom: 8px;
}

.venue-card p {
    color: #6b7280;
    font-size: 16px;
    line-height: 1.6;
}

/* Registration Section */
.registration-section {
    margin-top: 48px;
}

.registration-card {
    background: linear-gradient(135deg, #3b82f6, #1e40af);
    color: white;
    padding: 40px;
    border-radius: 16px;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
    box-shadow: 0 12px 24px rgba(59, 130, 246, 0.3);
}

.registration-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
}

.registration-card p {
    font-size: 16px;
    margin-bottom: 24px;
    opacity: 0.9;
}

.registration-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: white;
    color: #3b82f6;
    text-decoration: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.registration-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    background: #f8fafc;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 48px 0;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}

.footer .logo-icon {
    background: #3b82f6;
}

.footer .logo-text h3 {
    font-size: 20px;
    font-weight: 700;
    color: white;
    line-height: 1.2;
}

.footer .logo-text p {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.2;
}

.footer-divider {
    width: 100%;
    height: 1px;
    background: #374151;
    margin-bottom: 32px;
}

.footer-bottom p {
    color: #9ca3af;
    margin-bottom: 8px;
}

.footer-credit {
    color: #6b7280;
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .navigation {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        border-top: 1px solid #e5e7eb;
        gap: 16px;
    }

    .navigation.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 280px;
    }

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

    section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 48px;
    }

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

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

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

@media (max-width: 480px) {
    .hero-description {
        font-size: 16px;
    }

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

    .stat-number {
        font-size: 28px;
    }

    .topic-card,
    .contact-card,
    .venue-card {
        padding: 24px;
    }

    .date-card {
        padding: 32px 24px;
    }
}

/* Smooth animations */
@media (prefers-reduced-motion: no-preference) {
    .feature-card,
    .topic-card,
    .contact-card,
    .date-card {
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
}

/* Focus styles for accessibility */
button:focus,
a:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* Selection styles */
::selection {
    background: #dbeafe;
    color: #1e40af;
}

.logo-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
  gap: 7rem;
  background: none;
}

.logo-container img {
  /* height: 80px; */
  width: 80px;
}

.logo {
  height: 80px;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
  cursor: pointer;
}