/* Animation pour les éléments */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .animate-fade-in {
            animation: fadeIn 0.8s ease-out forwards;
        }
        
        .delay-1 { animation-delay: 0.2s; }
        .delay-2 { animation-delay: 0.4s; }
        .delay-3 { animation-delay: 0.6s; }
        
        /* Gradient personnalisé */
        .gradient-bg {
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
        }
        
        /* Effet de survol sur les cartes */
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        /* Style pour les onglets */
        .tab-active {
            border-bottom: 3px solid #3b82f6;
            color: #3b82f6;
        }