.holder-course {
    display: flex;
    flex-wrap: wrap;
}

.holder-course .columns {
    display: flex;
    flex-direction: column;
}

.holder-course .boardered {
    display: flex;
    flex-grow: 1;
    flex-direction: column;
}

.holder-course .row-content {
    flex-grow:1;
}
.holder-course .flexy {
    display: flex;
    flex-grow: 1;
    flex-direction: column;
    margin-bottom: 10px;
}