.justified-columns {
    text-align: justify;

    -webkit-column-gap: 40px;
    -moz-column-gap: 40px;
    column-gap: 40px;
}

@media (min-width:640px) {
    .columns-2 {
        -webkit-column-count: 2;
        -moz-column-count: 2;
        column-count: 2;
    }

    .columns-3 {
        -webkit-column-count: 3;
        -moz-column-count: 3;
        column-count: 3;
    }

    .columns-4 {
        -webkit-column-count: 4;
        -moz-column-count: 4;
        column-count: 4;
    }
}