/* ===== RESET ET BASE ===== */
* {
    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: #1a1a1a;
    overflow-x: hidden;
    font-display: swap;
    background: #ffffff;
}

/* Optimisations de performance */
img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Lazy loading pour les images */
.lazy {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.lazy.loaded {
    opacity: 1;
}

/* ===== VARIABLES CSS MODERNES ===== */
:root {
    /* Palette de couleurs vives - terrain de sport nocturne */
    --turquoise: #20E3B2;
    --magenta: #FF3CAC;
    --indigo: #1E3A8A;
    --turquoise-light: #4FD1C7;
    --magenta-light: #F472B6;
    --indigo-light: #3B82F6;
    
    /* Couleurs de texte */
    --text-dark: #1a1a1a;
    --text-light: #374151;
    --text-muted: #6b7280;
    --text-white: #ffffff;
    
    /* Couleurs de fond */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --black: #000000;
    
    /* Ombres modernes */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-neon: 0 0 20px rgba(32, 227, 178, 0.3);
    --shadow-magenta: 0 0 20px rgba(255, 60, 172, 0.3);
    
    /* Bordures */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-2xl: 32px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --spacing-4xl: 8rem;
}

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-family: 'Bebas Neue', 'Montserrat Alternates', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
}

/* ===== NAVIGATION STICKY MODERNE ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-200);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.logo-text {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: var(--spacing-xs) 0;
    font-size: 0.95rem;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--turquoise), var(--magenta));
    transition: var(--transition);
}

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

.nav-link.active {
    color: var(--turquoise);
}

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

.nav-cta {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
    border-radius: 2px;
}

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

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

.nav-toggle span.active:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== HERO SECTION MODERNE ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(32, 227, 178, 0.4) 0%, 
        rgba(255, 60, 172, 0.4) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
    color: var(--text-white);
    z-index: 1;
}

.hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.title-line {
    display: block;
    animation: fadeInUp 1s ease-out;
}

.title-line.highlight {
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.6s both;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-neon);
}

.stat-number {
    display: block;
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--turquoise);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease-out 1s both;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeInUp 1s ease-out 1.2s both;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid var(--text-white);
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

/* ===== BOUTONS CTA MODERNES ===== */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

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

.cta-button.primary {
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    color: var(--text-white);
    box-shadow: var(--shadow-lg);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-neon);
}

.cta-button.secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.cta-button.secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.large {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: 1.125rem;
}

.cta-button.small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
}

.cta-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.cta-button:hover .cta-icon {
    transform: translateX(3px);
}

/* ===== SECTION AMBITION ===== */
.ambition {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.ambition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.ambition-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

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

.ambition-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.ambition-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
}

.ambition-icon svg {
    width: 40px;
    height: 40px;
}

.ambition-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.ambition-desc {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== SECTION ÉVÉNEMENT ===== */
.event {
    padding: var(--spacing-4xl) 0;
    background: var(--white);
}

.event-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

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

.event-details {
    margin: var(--spacing-xl) 0;
}

.event-date, .event-location {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.event-date:hover, .event-location:hover {
    background: var(--gray-100);
    transform: translateX(5px);
}

.date-icon, .location-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    flex-shrink: 0;
}

.date-icon svg, .location-icon svg {
    width: 24px;
    height: 24px;
}

.date-info, .location-info {
    display: flex;
    flex-direction: column;
}

.date-label, .location-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.date-value, .location-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
}

.event-map {
    position: relative;
    height: 400px;
    background: var(--gray-100);
    border-radius: var(--border-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.map-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-pin {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    animation: pulse 2s infinite;
}

.map-pin svg {
    width: 30px;
    height: 30px;
}

.map-placeholder {
    position: absolute;
    bottom: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.9);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: 500;
    color: var(--text-dark);
}

/* ===== SECTION PARTENAIRES ===== */
.partners {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--indigo) 100%);
    color: var(--text-white);
}

.partners .section-title {
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.partners .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.partners-carousel {
    overflow: hidden;
    margin-top: var(--spacing-3xl);
}

.partners-track {
    display: flex;
    gap: var(--spacing-xl);
    animation: scroll 30s linear infinite;
    width: max-content;
}

.partner-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    min-width: 200px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.partner-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: var(--shadow-magenta);
}

.partner-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin: 0 auto var(--spacing-md);
    filter: brightness(0) invert(1);
    transition: var(--transition);
}

.partner-item:hover .partner-logo {
    filter: none;
}

.partner-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.partner-info p {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ===== SECTION QUI SOMMES-NOUS ===== */
.about {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-top: var(--spacing-3xl);
}

.about-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.about-desc {
    font-size: 1.125rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.about-values {
    margin-top: var(--spacing-xl);
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.value-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.value-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    flex-shrink: 0;
}

.value-icon svg {
    width: 24px;
    height: 24px;
}

.value-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.value-content p {
    color: var(--text-light);
    line-height: 1.6;
}

.about-image {
    position: relative;
}

.about-img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
}

/* ===== SECTION IHU PRISM ===== */
.scientific-partner {
    padding: var(--spacing-4xl) 0;
    background: var(--white);
}

.scientific-partner-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-bottom: var(--spacing-3xl);
}

.scientific-partner-logo {
    display: flex;
    justify-content: center;
}

.main-partner-logo {
    width: 300px;
    height: auto;
    object-fit: contain;
}

.scientific-partner-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.scientific-partner-desc {
    font-size: 1.125rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.scientific-partner-impact {
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    color: var(--text-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    margin-top: var(--spacing-lg);
}

.scientific-partner-impact h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.founding-institutions {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

.institutions-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.institutions-subtitle {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-2xl);
}

.institutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.institution-item {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

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

.institution-logo {
    width: 80px;
    height: 60px;
    object-fit: contain;
    margin: 0 auto var(--spacing-md);
}

.institution-name {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

.institution-desc {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* ===== SECTION RECHERCHE ===== */
.research {
    padding: var(--spacing-4xl) 0;
    background: var(--white);
}

.research-timeline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: var(--spacing-3xl) 0;
    position: relative;
}

.research-timeline::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--turquoise), var(--magenta));
    transform: translateY(-50%);
    z-index: 0;
}

.timeline-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 1;
}

.timeline-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.timeline-icon:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl), var(--shadow-neon);
}

.timeline-icon svg {
    width: 40px;
    height: 40px;
}

.timeline-content h3 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.6;
    max-width: 200px;
}

.research-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

/* ===== FOOTER MODERNE ===== */
.footer {
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--indigo) 100%);
    color: var(--text-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.footer-logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.footer-logo-text {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-white);
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xs);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    transition: var(--transition);
    text-decoration: none;
}

.social-link:hover {
    background: linear-gradient(135deg, var(--turquoise), var(--magenta));
    transform: translateY(-2px);
    box-shadow: var(--shadow-neon);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-link {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--turquoise);
    transform: translateX(5px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-copyright, .footer-association {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translate(-50%, -50%) rotate(45deg);
    }
    40% {
        transform: translate(-50%, -60%) rotate(45deg);
    }
    60% {
        transform: translate(-50%, -55%) rotate(45deg);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(32, 227, 178, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(32, 227, 178, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(32, 227, 178, 0);
    }
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--spacing-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        border-top: 1px solid var(--gray-200);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-cta {
        display: none;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .event-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .event-info {
        padding-right: 0;
    }

    .research-timeline {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .research-timeline::before {
        display: none;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .scientific-partner-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .main-partner-logo {
        width: 200px;
    }

    .institutions-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-lg);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .cta-button.large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }
}

/* ===== ACCESSIBILITÉ ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== MODE SOMBRE ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-dark: #f1f5f9;
        --text-light: #cbd5e1;
        --text-muted: #94a3b8;
        --white: #0f172a;
        --gray-50: #1e293b;
        --gray-100: #334155;
        --gray-200: #475569;
        --gray-300: #64748b;
        --gray-800: #f1f5f9;
        --gray-900: #f8fafc;
    }

    body {
        background: var(--white);
        color: var(--text-dark);
    }

    .navbar {
        background: rgba(15, 23, 42, 0.95);
        border-bottom-color: var(--gray-700);
    }

    .ambition {
        background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    }

    .event {
        background: var(--white);
    }

    .research {
        background: var(--white);
    }
}