#resultado {
    font-family: Arial, sans-serif;
    font-size: 18px;
    text-align: justify;
    padding: 20px;
    border: 1px solid #ccc;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.fondo-claro {
    background-color: #f0f0f0;
}

.fondo-oscuro {
    background-color: #333;
    color: #fff;
}