/* ========== VARIABLES ========== */
:root {
    --primary: #0033A0;
    --primary-dark: #002277;
    --primary-light: #3366cc;
    --secondary: #DA291C;
    --secondary-light: #e85d4a;
    --accent: #27AE60;
    --accent-light: #58d68d;
    --dark: #1a1a2e;
    --gray: #4a5568;
    --gray-light: #e2e8f0;
    --gray-bg: #f7fafc;
    --white: #ffffff;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
    --shadow-hover: 0 20px 25px -12px rgba(0, 0, 0, 0.15);
    --border-radius: 1rem;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--gray-bg);
    color: var(--dark);
    line-height: 1.5;
    scroll-behavior: smooth;
}

/* ========== TYPOGRAPHIE ========== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--secondary);
    border-radius: 2px;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

/* ========== NAVIGATION ========== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--primary);
}

.logo span {
    color: var(--secondary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    flex-wrap: wrap;
}

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

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

/* ========== BOUTONS ========== */
.btn-download {
    background: var(--primary);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 2rem;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-download:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ========== HERO ========== */
.hero {
    min-height: 90vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    margin-top: 0;
}

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

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

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

.hero-stat .number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-light);
}

.hero-stat .label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ========== SECTIONS ========== */
section {
    padding: 5rem 2rem;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

/* Grille KPI */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.kpi-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.kpi-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.kpi-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.kpi-label {
    color: var(--gray);
    font-weight: 500;
}

/* Double colonnes */
.two-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Cartes données */
.data-card {
    background: var(--white);
    padding: 1.75rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.data-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

/* Graphiques */
.chart-container {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

canvas {
    max-height: 300px;
    width: 100%;
}

/* Recommandations */
.rec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.rec-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--secondary);
}

.rec-item:hover {
    transform: translateX(5px);
}

.rec-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.rec-item h4 {
    margin-bottom: 0.5rem;
}

/* Footer */
.footer-logos {
    background: var(--white);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--gray-light);
}

.logo-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 1.5rem;
}

.logo-grid span {
    font-weight: 700;
    color: var(--gray);
    font-size: 1rem;
}

/* Badges et highlights */
.badge {
    display: inline-block;
    background: var(--gray-light);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.stat-highlight {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
}

hr {
    margin: 2rem 0;
    border: none;
    height: 1px;
    background: var(--gray-light);
}

/* Animation fade-up */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}