:root {
    --primary: #0077B6;
    --secondary: #90E0EF;
    --dark: #023E8A;
    --light: #CAF0F8;
    --text: #333;
    --bg: #F8FDFF;
    --white: #ffffff;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --radius: 12px;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background-color: var(--bg);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background: var(--white);
    box-shadow: var(--shadow);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

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

/* Hero */
.hero {
    padding: 80px 0;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.pexels.com/photos/34865451/pexels-photo-34865451.jpeg?auto=compress&cs=tinysrgb&fit=crop&h=627&w=1200') no-repeat center/cover;
    color: var(--white);
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
}

/* Sections */
section {
    padding: 60px 0;
}

h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    color: var(--dark);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    border: 1px solid rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.card h3 {
    margin-bottom: 10px;
    color: var(--primary);
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 12px 25px;
    border-radius: 50px;
    font-weight: 600;
    margin-top: 20px;
}

.btn:hover {
    background: var(--dark);
}

/* Footer */
footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 0 20px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-grid h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--secondary);
}

.footer-grid ul li {
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.footer-grid ul li a:hover {
    color: var(--secondary);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Animations — v2 FIX : opacity:1 par defaut pour ne JAMAIS cacher le contenu
   si le JS observer rate. La classe .revealed reste pour l'effet visuel. */
.reveal-on-scroll {
    opacity: 1;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .nav-links { display: none; }
    .grid { grid-template-columns: 1fr; }
}