/* =========================================
           ESTILOS ESPECÍFICOS: CARACTERÍSTICAS
           ========================================= */
        .feat-header {
            background-color: var(--color-secondary);
            color: var(--color-white);
            padding: 60px 20px;
            text-align: center;
            border-bottom: 5px solid var(--color-primary);
        }
        .feat-header h1 {
            color: var(--color-white);
            font-size: 2.2em;
            margin: 0 0 10px 0;
            text-transform: uppercase;
        }
        .feat-intro {
            max-width: 900px;
            margin: 40px auto 20px auto;
            text-align: center;
            font-size: 1.1em;
            color: #555;
            line-height: 1.6;
            padding: 0 20px;
        }
        
        /* Grid de Tarjetas */
        .grid-principios {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            padding: 20px 20px 60px 20px;
            max-width: 1100px;
            margin: 0 auto;
        }
        .card-principio {
            background-color: #fff;
            padding: 30px 20px;
            border-radius: 15px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            text-align: center;
            border-top: 4px solid transparent;
            transition: all 0.3s ease;
        }
        .card-principio:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(49, 54, 76, 0.1);
        }
        .border-blue { border-top-color: var(--color-secondary); }
        .border-orange { border-top-color: var(--color-primary); }
        
        .card-icon {
            font-size: 40px;
            margin-bottom: 15px;
            color: var(--color-primary);
        }
        .border-orange .card-icon { color: var(--color-secondary); } /* Intercala colores de iconos */
        
        .card-principio h3 {
            color: var(--color-secondary);
            font-size: 1.1em;
            margin-bottom: 15px;
            font-weight: bold;
        }
        .card-principio p {
            font-size: 0.95em;
            color: #666;
            line-height: 1.5;
            margin: 0;
        }

        /* Botón de Descarga */
        .download-section {
            text-align: center;
            padding: 0 20px 60px 20px;
        }
        .btn-download-big {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background-color: var(--color-primary);
            color: white;
            padding: 15px 40px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1em;
            transition: 0.3s;
            text-transform: uppercase;
        }
        .btn-download-big:hover {
            background-color: var(--color-secondary);
        }