/* --- Variables et Bases --- */
:root {
    --primary-color: #2e7d32;   /* Vert nature */
    --secondary-color: #1b5e20; /* Vert foncé */
    --accent-color: #e67e22;    /* Orange pour les points clés */
    --bg-light: #f4f7f6;
    --text-dark: #333;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    margin: 0;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* --- Header & Navigation --- */
header {
    background: url('https://www.gr-infos.com/divers/photos/gr700/6x-min.jpg') center/cover no-repeat;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.overlay {
    background: rgba(0, 0, 0, 0.4);
    padding: 30px;
    border-radius: 8px;
    backdrop-filter: blur(3px);
}

nav {
    background: #2c3e50;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
    margin: 0;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* --- Structure Principale --- */
main {
    max-width: 1000px;
    margin: 40px auto;
    padding: 20px;
    background: white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

h2 {
    color: var(--primary-color);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 10px;
    margin-top: 50px;
}

/* --- Section Histoire --- */
blockquote {
    font-style: italic;
    font-size: 1.2em;
    border-left: 5px solid var(--primary-color);
    padding: 20px;
    background: #f1f8e9;
    margin: 30px 0;
}

/* --- Section Étapes (Cartes) --- */
.region-section {
    margin: 30px 0;
}

.region-title {
    color: var(--secondary-color);
    background: #e8f5e9;
    padding: 10px 15px;
    border-radius: 4px;
}

.card {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    margin-bottom: 15px;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateX(10px);
    border-color: var(--primary-color);
}

.card-header {
    background: #f9f9f9;
    padding: 12px;
    font-weight: bold;
    border-bottom: 1px solid #eee;
}

.card-body {
    padding: 12px;
    font-size: 0.95em;
}

.highlight {
    border-left: 5px solid var(--accent-color);
}

/* --- Bouton Lien Externe --- */
.external-link-box {
    text-align: center;
    padding: 30px;
    background: #fdfdfd;
    border: 2px dashed #ccc;
    margin-top: 30px;
}

.btn-link {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn-link:hover {
    background: var(--secondary-color);
}

/* --- Grille Nature (Faune/Flore) --- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 20px;
}

.grid article {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 40px;
    background: #2c3e50;
    color: white;
    margin-top: 60px;
}

/* --- Responsive --- */
@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
        text-align: center;
    }
}