:root {
    --primary: #0A2463; /* Bleu profond */
    --secondary: #FF6B35; /* Orange vif */
    --accent: #F4D35E; /* Jaune doré */
    --light: #F7F9FC;
    --dark: #1E1E24;
    --green: #27AE60;
    --purple: #764BA2;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    overflow-x: hidden;
    background-color: var(--light);
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 60px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.logo-text {
    font-weight: 700;
    font-size: 1.8rem;
    background: linear-gradient(45deg, var(--primary), var(--purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 1px;
}

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

.nav-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 1.1rem;
    position: relative;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--secondary);
    border-radius: 2px;
    transition: width 0.3s ease;
}

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

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1a3365 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.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>');
    animation: float 20s ease-in-out infinite;
}

.african-pattern {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><path d="M0,0 L100,0 L100,100 L0,100 Z" fill="none" stroke="%23F4D35E" stroke-width="4"/><circle cx="50" cy="50" r="10" fill="%23FF6B35"/><rect x="30" y="30" width="40" height="40" fill="%2327AE60" opacity="0.7"/></svg>');
    background-size: 200px 100px;
    opacity: 0.3;
    z-index: 1;
}

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

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    animation: slideInUp 1s ease-out;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    line-height: 1.1;
}

.hero h1 span {
    color: var(--accent);
    display: block;
}

/* Event Statistics Cards */
.event-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.stat-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border-top: 4px solid var(--secondary);
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 1rem;
    display: block;
    background: linear-gradient(45deg, var(--primary), var(--purple));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat-label {
    font-size: 1.1rem;
    color: #666;
    font-weight: 600;
    line-height: 1.4;
}

/* Responsive pour les cartes de statistiques */
@media (max-width: 768px) {
    .event-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2.8rem;
    }

    .stat-card {
        padding: 2rem 1.5rem;
    }
}
.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: slideInUp 1s ease-out 0.2s both;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero .date-location {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    animation: slideInUp 1s ease-out 0.4s both;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

.location-icon, .date-icon {
    background: var(--secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Countdown Timer */
.countdown {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 3rem 0;
    animation: slideInUp 1s ease-out 0.6s both;
}

.countdown-item {
    background: rgba(255, 255, 255, 0.15);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    min-width: 120px;
    transition: all 0.3s ease;
}

.countdown-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.countdown-number {
    font-size: 2.5rem;
    font-weight: bold;
    display: block;
    color: var(--accent);
}

.countdown-label {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(45deg, var(--secondary), var(--accent));
    color: var(--primary);
    padding: 15px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
    animation: slideInUp 1s ease-out 0.8s both;
    position: relative;
    overflow: hidden;
    z-index: 1;
    border: none;
    cursor: pointer;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: linear-gradient(45deg, var(--accent), var(--secondary));
    transition: all 0.5s ease;
    z-index: -1;
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.5);
}

.cta-button:hover::before {
    width: 100%;
}

/* About Section */
.about {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e6ebf5 100%);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    opacity: 0.2;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 3rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
}

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

.objective-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border-top: 4px solid var(--secondary);
}

.objective-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.objective-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.objective-card h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Program Section */
.program {
    padding: 100px 0;
    background: white;
    position: relative;
}

.program::before {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--green) 0%, transparent 70%);
    opacity: 0.1;
    z-index: 0;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary), var(--purple));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin: 3rem 0;
    padding: 0 2rem;
}

.timeline-item:nth-child(odd) {
    text-align: right;
    padding-right: calc(50% + 2rem);
}

.timeline-item:nth-child(even) {
    text-align: left;
    padding-left: calc(50% + 2rem);
}

.timeline-content {
    background: var(--light);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    position: relative;
    transition: all 0.3s ease;
    border-left: 4px solid var(--secondary);
}

.timeline-item:nth-child(odd) .timeline-content {
    border-left: none;
    border-right: 4px solid var(--accent);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.timeline-time {
    font-weight: bold;
    color: var(--secondary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-title {
    font-size: 1.3rem;
    margin: 0.5rem 0 1rem;
    color: var(--primary);
}

/* Sponsors Section */
.sponsors {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--purple) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.sponsors::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" width="100" height="100" viewBox="0 0 100 100"><circle cx="20" cy="20" r="3" fill="white" opacity="0.1"/><circle cx="50" cy="50" r="5" fill="white" opacity="0.1"/><circle cx="80" cy="80" r="4" fill="white" opacity="0.1"/></svg>');
    background-size: 200px;
}

.sponsors .section-title {
    color: white;
}

.sponsors .section-title::after {
    background: var(--accent);
}

.sponsors-slider {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
    margin: 3rem 0;
    padding: 2rem 0;
}

.sponsors-track {
    display: inline-flex;
    animation: scroll 30s linear infinite;
    gap: 3rem;
    align-items: center;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.sponsor-logo {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--primary);
    white-space: normal;
    transition: all 0.3s ease;
}

.sponsor-logo:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}


/* Organizers Section */
.organizers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
    justify-items: center;
}

.organizer-card {
    background: white;
    padding: 3rem 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    max-width: 400px;
    width: 100%;
}

.organizer-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.organizer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.organizer-logo {
    width: 150px;
    height: 150px;
    margin: 0 auto 2rem;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    padding: 1rem;
}

.organizer-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 10px;
}

.organizer-name {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
    font-weight: 700;
}

.organizer-website {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.organizer-description {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
}

/* Team Section */
.team {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.team-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.team-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    background: linear-gradient(45deg, var(--primary), var(--purple));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
    font-weight: bold;
}

.highlight-name {
    color: var(--secondary);
}

.team-role {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.team-name {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}