body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background-image: url('../images/fond-ecran.jpg');
            background-repeat: no-repeat;
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }
        /* ==========================================================================
           COMPOSANTS STANDARDISÉS & SÉCURISÉS
           ========================================================================== */
        .app-card {
            background-color: #ffffff;
            border-radius: 1rem;
            border: 1px solid rgba(226, 232, 240, 0.8);
            padding: 1.25rem;
            height: 260px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        /* Effet de survol standard pour les cartes classiques (sans flip) */
        .app-card-static:hover {
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            transform: translateY(-4px);
        }

        .app-badge {
            font-size: 10px;
            font-weight: 700;
            padding: 0.2rem 0.5rem;
            border-radius: 0.375rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .app-desc {
            color: #475569;
            font-size: 11px;
            line-height: 1.625;
            margin-top: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 4;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .app-btn {
            width: 100%;
            background-color: #0f2c59;
            color: #ffffff;
            font-weight: 600;
            font-size: 0.85rem;
            padding: 0.5rem 0;
            border-radius: 0.75rem;
            transition: background-color 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
        .app-btn:hover {
            background-color: #1e447b;
        }

        /* Thèmes de couleurs pour les badges */
        .theme-sig { background-color: #eff6ff; color: #2563eb; }
        .theme-image { background-color: #eef2ff; color: #4f46e5; }
        .theme-terrain { background-color: #fffbeb; color: #b45309; }
        .theme-incident { background-color: #fef2f2; color: #dc2626; }
        .theme-doc { background-color: #ecfdf5; color: #059669; }
        .theme-auscultation { background-color: #faf5ff; color: #9333ea; }
        .theme-pub { background-color: #f0fdfa; color: #0d9488; }

        /* ==========================================================================
           EFFET FLIP (RETOURNEMENT 3D COHÉRENT)
           ========================================================================== */
        .flip-container {
            perspective: 1000px;
            height: 260px;
        }
        .flip-card-inner {
            position: relative;
            width: 100%;
            height: 100%;
            transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
            transform-style: preserve-3d;
        }
        /* Déclenchement du retournement au survol de la zone */
        .flip-container:hover .flip-card-inner {
            transform: rotateY(180deg);
        }
        .flip-front, .flip-back {
            position: absolute;
            width: 100%;
            height: 100%;
            -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
            border-radius: 1rem;
        }
        .flip-back {
            transform: rotateY(180deg);
        }