/* Variables CSS */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --dark-color: #1f2937;
    --light-color: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}

p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* Navigation */
.navbar {
    background: #ffffff;
    border-bottom: 1px solid var(--gray-200);
    padding: 0;
    transition: all 0.3s ease;
}

.navbar-brand img {
    transition: transform 0.3s ease;
}

.navbar-brand:hover img {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700) !important;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius);
}

.nav-link:hover {
    color: var(--primary-color) !important;
    background-color: var(--gray-100);
}

.nav-link.btn {
    background: var(--primary-color);
    color: white !important;
    border: none;
    padding: 0.5rem 1.5rem !important;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-link.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-dark);
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    opacity: 0.9;
}

.hero-overlay {
    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 1000 1000"><polygon fill="rgba(255,255,255,0.05)" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: white;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-badge i {
    margin-right: 0.5rem;
    color: var(--secondary-color);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.1;
    color: #ffffff;
}

.hero-subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--secondary-color);
    margin-top: 0.5rem;
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.6;
}

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

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #ff6b35;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.stat-label {
    font-size: 0.9rem;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Animation pour hero-stats */
.hero-stats.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.hero-stats .stat-item {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.hero-stats.fade-in-up .stat-item {
    opacity: 1;
    transform: translateY(0);
}

.hero-stats.fade-in-up .stat-item:nth-child(1) {
    transition-delay: 0.1s;
}

.hero-stats.fade-in-up .stat-item:nth-child(2) {
    transition-delay: 0.2s;
}

.hero-stats.fade-in-up .stat-item:nth-child(3) {
    transition-delay: 0.3s;
}

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

.hero-actions .btn {
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.hero-actions .btn-primary {
    background: var(--secondary-color);
    border: none;
    color: white;
}

.hero-actions .btn-primary:hover {
    background: #d97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.hero-actions .btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: transparent;
    color: white;
}

.hero-actions .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-logo {
    max-width: 300px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: float 4s ease-in-out infinite;
}

.floating-card i {
    color: var(--secondary-color);
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 60%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 2s;
}

/* Sections */
.section-padding {
    padding: 6rem 0;
}

.section-subtitle {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.section-text {
    font-size: 1.1rem;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 2rem;
}

/* Features */
.features-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 1.5rem;
    color: white;
}

.feature-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.feature-content p {
    color: var(--gray-600);
    margin: 0;
}

/* Image Grid */
.image-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 1rem;
    height: 400px;
}

.image-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
}

.image-item.large {
    grid-row: span 2;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    padding: 2rem;
}

.image-placeholder i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.image-placeholder span {
    font-weight: 600;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-200);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-time {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    white-space: nowrap;
}

.timeline-content {
    width: 45%;
    padding: 0 2rem;
}

.timeline-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.timeline-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.timeline-card.featured {
    border-left-color: var(--secondary-color);
    background: linear-gradient(135deg, #fff 0%, #fef3c7 100%);
}

.timeline-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.timeline-card.featured .timeline-icon {
    background: var(--secondary-color);
}

.timeline-icon i {
    color: white;
    font-size: 1.2rem;
}

.timeline-card h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.timeline-card .speaker {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-speaker-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

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

.timeline-speakers-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.timeline-speaker-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.timeline-card p {
    color: var(--gray-600);
    margin: 0;
}

/* Speakers */
.speaker-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

.speaker-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.speaker-avatar {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.speaker-avatar i {
    font-size: 2rem;
    color: white;
}

.speaker-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.speaker-card h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

.speaker-title {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.speaker-topic {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin: 0;
}

.panel-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-900);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
}



/* Register */
.register-card {
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    padding: 3rem;
    text-align: center;
}

.register-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-700);
    font-weight: 500;
}

.info-item i {
    color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-brand p {
    color: var(--gray-400);
    margin-top: 1rem;
}

.footer h5 {
    color: white;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

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

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

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.social-link {
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.footer-divider {
    border-color: var(--gray-800);
    margin: 2rem 0 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
        margin-bottom: 2rem;
    }
    
    .timeline-time {
        position: relative;
        left: 0;
        transform: none;
        margin-bottom: 1rem;
        align-self: flex-start;
    }
    
    .timeline-content {
        width: 100%;
        padding-left: 0;
        padding-right: 0;
    }
    
    .register-info {
        flex-direction: column;
        gap: 1rem;
    }
    
    .floating-card {
        display: none;
    }
}

@media (max-width: 576px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .timeline-card {
        padding: 1.5rem;
    }
    
    .pricing-card {
        padding: 2rem 1.5rem;
    }
    
    .register-card {
        padding: 2rem 1.5rem;
    }
}

/* 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;
}

/* Modal Styles */
.modal-content {
    border-radius: var(--border-radius-lg);
    border: none;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 1px solid var(--gray-200);
    padding: 1.5rem 2rem;
}

.modal-title {
    font-weight: 600;
    color: var(--gray-900);
}

.modal-body {
    padding: 2rem;
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.modal-icon i {
    font-size: 2rem;
    color: white;
}

.modal-body h4 {
    color: var(--gray-900);
    font-weight: 600;
}

.modal-body p {
    color: var(--gray-600);
    line-height: 1.6;
}

.community-info {
    margin: 2rem 0;
}

.community-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 1rem;
}

.stat {
    text-align: center;
}



.modal-footer {
    border-top: 1px solid var(--gray-200);
    padding: 1.5rem 2rem;
    gap: 1rem;
}

.modal-footer .btn {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--border-radius);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}