#pie {
    height: 30px;
    background-color: #333;
    color: #fff;
    text-align: center;
}

#caja p {
    background: #ffffff;
    color: #f00;
    margin-left: 40px;
}
.caja {
    margin-left: 10%;
    margin-right: 10%;
    padding: 10px;
    font-size: 15px;
    text-align: justify;
    font-size: 1rem;
    line-height: 1.333333334;
}


.three-columns {
    -webkit-column-count: 3; /* Chrome, Safari, Opera */
    -moz-column-count: 3; /* Firefox */
    column-count: 3;
    -webkit-column-gap: 20px; /* Chrome, Safari, Opera */
    -moz-column-gap: 20px; /* Firefox */
    column-gap: 20px;
    -webkit-column-gap: 2rem; /* Chrome, Safari, Opera */
    -moz-column-gap: 2rem; /* Firefox */
    column-gap: 2rem;
    -webkit-column-rule: 5px solid rgb(75, 180, 149); /* Chrome, Safari, Opera */
    -moz-column-rule: 5px solid rgb(75, 180, 149); /* Firefox */
    column-rule: 5px solid rgb(75, 180, 149);
    -webkit-column-rule: 0.5rem solid rgb(75, 180, 149); /* Chrome, Safari, Opera */
    -moz-column-rule: 0.5rem solid rgb(75, 180, 149); /* Firefox */
    column-rule: 0.5rem solid rgb(75, 180, 149);
    margin: 20px;
    margin: 2rem;
    font-size: 15px;
    font-size: 1rem;
    line-height: 1.333333334;
    margin-bottom: 20px;
    margin-bottom: 2rem;
    text-align: justify;
}

#literatura {
    color: black;
    padding: 3rem;
    margin-left: 80px;
    margin-right: 80px;
    max-width: 1000px;
    display: block; /*para IE*/
    text-align: justify;
}