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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }

        /* NOUVEAUX STYLES D'EN-TÊTE ET DE NAVIGATION */
        header {
            background: linear-gradient(135deg, #dce3ea, #1a93bc);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.15);
        }

        .navbar {
            padding: 1rem 0;
        }

        .navbar-brand img {
            height: 100px;
            border-radius: 5px;
        }
        .logo {
            height: 100px;
            border-radius: 5px;
        }

        .navbar-nav .nav-link {
            color: white !important;
            font-weight: 500;
            margin: 0 0.5rem;
            transition: transform 0.3s, color 0.3s;
        }

        .navbar-nav .nav-link:hover {
            transform: translateY(-2px);
            color: #FFD700 !important;
        }


        /* STYLES PERSONNALISÉS DU MENU MOBILE (POUR L'AFFICHAGE capture3.jpg) */
        @media (max-width: 991.98px) {
            /* Rend le menu dépliable pleine hauteur/largeur */
            .navbar-collapse {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: linear-gradient(135deg, #007BFF, #00BFFF); /* Fond comme l'en-tête */
                z-index: 1050; 
                padding-top: 5rem; 
                padding-left: 1rem;
                padding-right: 1rem;
                background-color: transparent !important;
            }

            /* Styles des éléments de liste pour la séparation */
            .navbar-nav .nav-item {
                margin: 0;
                border-bottom: 2px solid rgba(255, 255, 255, 0.4); /* Ligne de séparation */
                padding: 0.5rem 0; 
            }
            
            .navbar-nav .nav-link {
                font-size: 1.25rem; 
                font-weight: 500;
                padding-left: 0; 
            }
            
            /* Style du bouton de fermeture personnalisé (X en haut à droite) */
            .btn-close-mobile {
                position: absolute;
                top: 1.5rem;
                right: 1rem;
                font-size: 2rem;
                background: none;
                border: none;
                color: white;
                z-index: 1060;
                cursor: pointer;
                padding: 0.5rem;
            }

            .btn-close-mobile i {
                color: white;
            }
            
            .navbar-brand {
                position: relative; 
                z-index: 1060; 
            }

            .navbar-brand .logo-container {
                width: 100%;
                text-align: left;
                padding-left: 0;
            }
            
            .nav-list-container {
                width: 100%;
                margin-left: 0 !important;
            }
        }
        /* FIN DES NOUVEAUX STYLES D'EN-TÊTE */

        main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }

        h1 {
            font-size: 2.5rem;
            color: #007BFF;
            margin-bottom: 1rem;
            text-align: center;
            opacity: 0;
            animation: fadeIn 1s ease-in forwards;
        }

        .intro-text {
            text-align: center;
            font-size: 1.1rem;
            color: #555;
            margin-bottom: 3rem;
            opacity: 0;
            animation: fadeIn 1s ease-in forwards;
            animation-delay: 0.2s;
        }

        .objectives-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 2.5rem;
        }

        .objective-card {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            border-top: 5px solid #00BFFF;
            transition: all 0.4s ease;
            cursor: pointer;
            overflow: hidden;
            height: 180px; /* Taille fixe pour l'état fermé */
            opacity: 0;
            animation: fadeIn 1s ease-in forwards;
            position: relative;
        }

        .objective-card[data-objective="1"] { animation-delay: 0.3s; }
        .objective-card[data-objective="2"] { animation-delay: 0.4s; }
        .objective-card[data-objective="3"] { animation-delay: 0.5s; }
        .objective-card[data-objective="4"] { animation-delay: 0.6s; }


        .objective-card:hover {
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
            transform: translateY(-5px);
        }

        .objective-card h2 {
            font-size: 1.5rem;
            color: #007BFF;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .objective-card .icon {
            font-size: 1.8rem;
            color: #28A745;
        }

        .objective-card .details {
            display: none;
            padding-top: 1rem;
            border-top: 1px dashed #e0e0e0;
        }

        .objective-card.expanded {
            height: auto; /* Permet à la carte de s'étendre */
            border-color: #28A745;
        }

        .objective-card.expanded .details {
            display: block;
        }

        .objective-card p {
            font-size: 1rem;
            color: #555;
            margin-bottom: 1rem;
        }
        
        .objective-card .click-info {
            font-size: 0.9rem;
            font-style: italic;
            color: #999;
            text-align: right;
            margin-top: 0.5rem;
            position: absolute;
            bottom: 1rem;
            right: 2rem;
            width: fit-content;
        }

        .objective-card.expanded .click-info:last-child {
            display: none; /* Cache "Click to read more" lorsque la carte est étendue */
        }
        .objective-card .click-info:first-child {
            display: none; /* Cache "Click to close" lorsque la carte est fermée */
        }
        .objective-card.expanded .click-info:first-child {
            display: block; /* Affiche "Click to close" lorsque la carte est étendue */
            position: relative;
            text-align: left;
            margin-top: 1rem;
            bottom: auto;
            right: auto;
        }
        

        /* CALL TO ACTION */
        .cta-section {
            background: linear-gradient(135deg, #A7C7E7, #B2D8B2);
            text-align: center;
            padding: 4rem 2rem;
            margin-top: 3rem;
            border-radius: 10px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        }

        .cta-section h2 {
            font-family: 'Playfair Display', serif;
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: #333;
        }

        .cta-button {
            display: inline-block;
            background: linear-gradient(135deg, #28A745 0%, #007BFF 100%);
            color: white;
            padding: 1rem 2.5rem;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 4px 15px rgba(40,167,69,0.3);
            margin-top: 1rem;
        }

        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(40,167,69,0.4);
        }


        footer {
            background: linear-gradient(135deg, #343a40 0%, #495057 100%);
            color: white;
            text-align: center;
            padding: 2rem 1rem;
            margin-top: 3rem;
        }

        .social-links {
            margin: 1rem 0;
        }

        .social-links a {
            color: white;
            margin: 0 0.5rem;
            text-decoration: none;
            transition: color 0.3s;
        }

        .social-links a:hover {
            color: #00BFFF;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (max-width: 991.98px) {
            .objectives-grid {
                grid-template-columns: 1fr;
            }
            
            /* Ajustement pour le mobile: donner plus d'espace aux cartes */
            .objective-card {
                height: 200px; /* Légèrement plus haut pour le mobile */
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }
        }