@media (max-width : 580px) {
    .cont-notas .nota {
        width: 100%;
        display: block;
        float: left;
        padding: 15px;
        box-sizing: border-box;
        margin: 0;
    }

    .nota h3 {
        padding: 10px 0 0px;
    }
}

.cont-notas .nota {
    width: 33.333% !important;
    float: left;
    padding: 15px;
    box-sizing: border-box;
    margin: 0;
}

.text-inherit {
    text-transform: inherit;
    line-height: 52px;
}