:root {
    --primary-green: #2E7D32;
    --primary-dark: #1A237E;
    --primary-gold: #FFC107;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
    --card-bg: #FFFFFF;
    --font-sans: 'Inter', sans-serif;
    --font-serif: 'Playfair Display', serif;
    --container-max: 1280px;
    --header-height: 70px;
}

[data-theme="dark"] {
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --border-color: #374151;
    --card-bg: #1F2937;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background 0.3s, color 0.3s;
    line-height: 1.6;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    z-index: 1000;
    height: var(--header-height);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-green), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: 0.3s;
}

.nav-links a:hover { color: var(--primary-green); }

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
}

/* Sections */
.section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--border-color);
}
.section-alt { background: var(--bg-secondary); }

h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 2rem;
    position: relative;
}
h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-green), var(--primary-gold));
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border: 1px solid var(--border-color);
    transition: 0.3s;
}
.card:hover { transform: translateY(-4px); }

.stat-card {
    text-align: center;
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
}
.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-green), var(--primary-gold));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.grid-2, .grid-3, .stats-grid {
    display: grid;
    gap: 2rem;
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.stats-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.quote {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-dark));
    color: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    margin: 2rem 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-dark));
    color: white;
}
.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
}

.organigramme-card .mermaid {
    background: white;
    padding: 1rem;
    border-radius: 1rem;
    text-align: center;
}
.legend {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}