/* ============================================
   Variables & Reset
   ============================================ */

:root {
    /* Colors */
    --color-primary: #000000;
    --color-secondary: #1a1a1a;
    --color-accent: #0066ff;
    --color-text: #2a2a2a;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e0e0e0;
    
    /* Charte graphique - Palette de couleurs pour les cases */
    --color-card-1: #0066ff;
    --color-card-2: #0052cc;
    --color-card-3: #003d99;
    --color-card-4: #1a7fff;
    --color-card-5: #3385ff;
    --color-card-6: #4d99ff;
    --color-card-7: #66adff;
    --color-card-8: #80c1ff;
    --color-card-9: #99d5ff;
    --color-card-10: #b3e9ff;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --font-size-h1: clamp(2.5rem, 5vw, 4rem);
    --font-size-h2: clamp(2rem, 4vw, 3rem);
    --font-size-h3: clamp(1.5rem, 3vw, 2rem);
    --font-size-h4: clamp(1.25rem, 2.5vw, 1.5rem);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --container-width: 1200px;
    --container-padding: 1.5rem;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-primary);
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    opacity: 0.8;
}

/* ============================================
   Navigation
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

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

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

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

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.logo .tagline {
    display: block;
    font-size: var(--font-size-small);
    font-weight: 400;
    color: var(--color-text-light);
    margin-top: 0.25rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu li a {
    color: #182148;
    font-weight: 500;
    font-size: var(--font-size-small);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-menu li a:hover::after {
    width: 100%;
}

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

.lang-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-small);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-text);
}

.lang-toggle:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-accent);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--container-padding) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, var(--color-accent) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--color-accent) 0%, transparent 50%);
    background-size: 100% 100%;
    opacity: 0.1;
}

.logo-hero {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-img {
    max-width: 200px;
    height: auto;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.05) 0%, transparent 70%);
    animation: pulse 20s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title {
    font-size: var(--font-size-h1);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: #182148;
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: #182148;
    color: var(--color-bg);
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid #182148;
}

.cta-button:hover {
    background: transparent;
    color: #182148;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-size: var(--font-size-small);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

.scroll-arrow {
    width: 2px;
    height: 30px;
    background: var(--color-text-light);
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: -3px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--color-text-light);
    border-bottom: 2px solid var(--color-text-light);
    transform: rotate(45deg);
}

/* ============================================
   Sections
   ============================================ */

.section {
    padding: var(--spacing-xl) var(--container-padding);
    position: relative;
}

.section-alt {
    background: var(--color-bg-alt);
}

#technology {
    background: #D9D9D9;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.section-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-text-light);
    opacity: 0.2;
    line-height: 1;
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: #182148;
}

.subsection-title {
    font-size: var(--font-size-h3);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: #182148;
}

.content-grid {
    display: grid;
    gap: var(--spacing-lg);
}

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

.content-grid.with-image.reverse {
    direction: rtl;
}

.content-grid.with-image.reverse > * {
    direction: ltr;
}

.content-main {
    max-width: 800px;
}

.content-image {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.section-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    transition: var(--transition);
    border-radius: var(--border-radius);
}

.content-image:hover .section-image {
    transform: scale(1.02);
}

.lead-text {
    font-size: var(--font-size-large);
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

#leadership .content-main p {
    color: #182148;
}

/* ============================================
   Commitments Grid
   ============================================ */

.commitments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.commitment-card {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.commitment-card {
    background: linear-gradient(135deg, rgba(0, 61, 153, 0.05) 0%, rgba(0, 61, 153, 0.02) 100%);
}

.commitment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: #182148;
    transition: var(--transition);
}

.commitment-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(24, 33, 72, 0.2);
    border-color: #182148;
}

.commitment-card h4 {
    font-size: var(--font-size-h4);
    margin-bottom: var(--spacing-xs);
    color: #182148;
    position: relative;
    padding-left: var(--spacing-sm);
}

.commitment-card p {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
    margin: 0;
}

/* ============================================
   SDG Grid
   ============================================ */

.sdg-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.sdg-category {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.sdg-category h3 {
    font-size: var(--font-size-h4);
    margin-bottom: var(--spacing-md);
    color: #182148;
}

.sdg-list {
    list-style: none;
}

.sdg-list li {
    padding: var(--spacing-xs) 0;
    color: #182148;
    position: relative;
    padding-left: var(--spacing-md);
}

.sdg-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #3FCFD5;
    font-weight: bold;
    font-size: 1.2em;
}

/* ============================================
   Quotes
   ============================================ */

.quote {
    font-size: var(--font-size-large);
    font-style: italic;
    color: var(--color-text-light);
    border-left: 6px solid #3FCFD5;
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    position: relative;
}

.large-quote {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-style: italic;
    color: var(--color-card-3);
    text-align: center;
    max-width: 900px;
    margin: var(--spacing-lg) auto;
    line-height: 1.6;
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8);
}

.quote-author {
    text-align: center;
    color: var(--color-card-3);
    font-weight: 600;
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-large);
}

.quote-section {
    margin: var(--spacing-lg) 0;
    padding: 0;
    background: transparent;
    border-radius: 0;
    position: relative;
    overflow: hidden;
    border: none;
    display: block;
    width: 100vw;
    max-width: 100vw;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    box-sizing: border-box;
}

.quote-section-banner {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    min-height: 400px;
}

.quote-background {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.2;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.quote-bg-image {
    width: 80%;
    height: 80%;
    max-width: 600px;
    max-height: 600px;
    object-fit: contain;
    filter: grayscale(100%) brightness(0.3) sepia(100%) hue-rotate(200deg) saturate(200%);
    opacity: 0.4;
}

.quote-content {
    position: relative;
    z-index: 1;
}

/* ============================================
   Stats Grid
   ============================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.stat-card {
    background: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-small);
    color: var(--color-text-light);
}

/* ============================================
   Partners Section
   ============================================ */

.partners-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.partners-title {
    font-size: var(--font-size-h3);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
    justify-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.partner-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    min-height: 100px;
    width: 100%;
}

.partner-logo:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.partner-logo img {
    max-width: 100%;
    max-height: 60px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: var(--transition);
}

.partner-logo:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: #182148;
    color: var(--color-bg);
    padding: var(--spacing-lg) var(--container-padding);
}

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    max-width: 150px;
    height: auto;
    margin-bottom: var(--spacing-sm);
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.footer-brand h2 {
    color: var(--color-bg);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-small);
}

.footer-contact h3 {
    color: var(--color-bg);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-h4);
}

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

.footer-contact a {
    color: var(--color-bg);
    text-decoration: underline;
}

.footer-legal {
    max-width: var(--container-width);
    margin: var(--spacing-lg) auto 0;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-legal-content {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-small);
    line-height: 1.8;
}

.footer-legal-content .legal-intro {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.9);
}

.footer-legal-content .legal-section {
    margin-bottom: var(--spacing-md);
}

.footer-legal-content .legal-section h4 {
    color: var(--color-bg);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

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

.footer-legal-content .legal-section a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: underline;
}

.footer-legal-content .legal-section a:hover {
    color: var(--color-bg);
    opacity: 1;
}

.footer-links {
    max-width: var(--container-width);
    margin: var(--spacing-md) auto 0;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-small);
    text-decoration: underline;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-bg);
    opacity: 1;
}

.footer-bottom {
    max-width: var(--container-width);
    margin: 0 auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-small);
    margin: 0;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        min-height: 80vh;
        padding-top: 100px;
    }
    
    .section-header {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .section-number {
        font-size: 2rem;
    }
    
    .commitments-grid,
    .sdg-grid,
    .stats-grid,
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .content-grid.with-image {
        grid-template-columns: 1fr;
    }
    
    .content-grid.with-image.reverse {
        direction: ltr;
    }
    
    .nav-menu {
        gap: var(--spacing-sm);
    }
    
    .logo {
        flex-direction: row;
        gap: var(--spacing-xs);
    }
    
    .logo-img-nav {
        height: 30px;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .logo .tagline {
        font-size: 0.7rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section {
        padding: var(--spacing-md) var(--container-padding);
    }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .navbar,
    .menu-toggle,
    .lang-toggle,
    .scroll-indicator,
    .cta-button {
        display: none;
    }
    
    .section {
        page-break-inside: avoid;
    }
}