#contenedor_tarjetas{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 400px));
    gap: 3rem;
    justify-content: center;
}
#tarjeta{
    background: #b6cac1;
    margin: auto;
}
#tarjeta .cabecera{
    display: flex;
    justify-content: space-between;
    font-size: 1.3rem;
    font-weight: bold;
    background-color: darkorange;
}
#tarjeta > div{
    padding: .5rem;
}
#tarjeta .pie{
    display: flex;
    justify-content: space-between;
}