/* --- Variables CSS pour la Charte Graphique --- */
:root {
    --primary-color: #0077b6; /* Bleu Profond et Confiance (Corporate/Pro) */
    --secondary-color: #48cae4; /* Bleu Ciel pour les accents */
    --text-dark: #333333; /* Texte principal */
    --text-light: #ffffff;
    --bg-light: #f8f9fa; /* Fond clair pour contraster */
    --bg-dark: #212529; /* Fond du Footer */
    --shadow-light: rgba(0, 0, 0, 0.1);
    --font-family: 'Poppins', sans-serif;
}

/* --- Base & Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--text-light);
    /* Lissage des polices pour un look moderne */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Conteneur Central pour Centrer le Contenu */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Titres */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; }

/* --- Boutons (CTA - Call to Action) --- */
.btn {
    display: inline-block;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s, transform 0.3s;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-light);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: #005f93; /* Assombrir */
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-dark);
    border: 2px solid var(--secondary-color);
}

.btn-secondary:hover {
    background-color: #3aa2b9;
    transform: translateY(-2px);
}

.btn-nav {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 8px 15px; /* Plus petit dans la navigation */
}
.btn-nav:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
    transform: none;
}


/* --- Header & Navigation --- */
.main-header {
    background-color: var(--text-light);
    padding: 15px 0;
    border-bottom: 1px solid #eeeeee;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--primary-color);
    margin: 0;
    font-size: 1.8rem;
    letter-spacing: 1px;
}

.main-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}

.main-nav ul li {
    margin-left: 20px;
}

.main-nav ul li a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 400;
    transition: color 0.3s;
}

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


/* --- Section Héro (Bannière Principale) --- */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('placeholder-bg.jpg') no-repeat center center/cover; /* Remplacer 'placeholder-bg.jpg' par une image pertinente */
    min-height: 80vh; /* Bonne hauteur pour l'impact visuel */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-light);
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.hero .subtitle {
    font-size: 1.3rem;
    max-width: 700px;
    margin: 0 auto 30px;
}


/* --- Sections de Contenu Général --- */
.section {
    padding: 80px 0;
    text-align: center;
}

.section h3 {
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 10px;
    display: inline-block;
}
.section h3::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    height: 3px;
    width: 50px;
    background-color: var(--primary-color);
    border-radius: 5px;
}

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


/* --- Mission Points --- */
.mission-points {
    display: flex;
    justify-content: space-around;
    gap: 20px;
    margin-top: 40px;
    text-align: left;
}

.point {
    flex: 1;
    padding: 20px;
    border-left: 3px solid var(--primary-color);
}

.point h4 {
    color: var(--primary-color);
    margin-top: 0;
}

/* --- Activités Grid --- */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.activity-card {
    background: var(--text-light);
    padding: 30px;
    border-radius: 8px;
    text-align: left;
    box-shadow: 0 4px 15px var(--shadow-light);
    transition: transform 0.3s;
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-light);
}

.activity-card h4 {
    color: var(--primary-color);
}


/* --- CTA Banner --- */
.cta-banner {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 50px 0;
    text-align: center;
}

.cta-banner h3 {
    margin-top: 0;
}

.cta-banner .btn-primary {
    background-color: var(--text-light);
    color: var(--primary-color);
    border-color: var(--text-light);
}
.cta-banner .btn-primary:hover {
    background-color: var(--secondary-color);
    color: var(--text-light);
    border-color: var(--secondary-color);
}


/* --- Footer --- */
.main-footer {
    background-color: var(--bg-dark);
    color: #cccccc;
    padding-top: 50px;
}

.main-footer .container {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}

.footer-info, .footer-nav {
    flex: 1;
    min-width: 250px;
}

.footer-nav ul {
    list-style: none;
}

.footer-nav a {
    color: #cccccc;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: color 0.3s;
}
.footer-nav a:hover {
    color: var(--secondary-color);
}

.copyright {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #333333;
    margin-top: 40px;
    font-size: 0.9rem;
}


/* --- Media Queries (Mobile-Friendly / Responsive) --- */
@media (max-width: 768px) {
    
    .main-header .container {
        flex-direction: column;
        text-align: center;
    }

    .main-nav {
        margin-top: 15px;
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .main-nav ul li {
        margin: 5px 0;
        width: 100%;
    }

    .hero h2 {
        font-size: 2.5rem;
    }

    .hero .subtitle {
        font-size: 1.1rem;
    }

    .mission-points {
        flex-direction: column;
        gap: 30px;
    }

    .point {
        border-left: none;
        border-bottom: 3px solid var(--primary-color);
        padding-bottom: 20px;
    }
    
    .main-footer .container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-nav ul {
        padding-left: 0;
    }
}

/* Ajustement pour les très petits écrans */
@media (max-width: 480px) {
    .section {
        padding: 60px 0;
    }
    
    .hero {
        min-height: 60vh;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
}