.level,
.level-center,
.level-between,
.level-end {
    display: flex;
    overflow-x: auto;

    align-items: center;
    flex-flow: row nowrap;
    justify-content: flex-start;
}

.level {
    &-center {
        justify-content: center;
    }

    &-between {
        justify-content: space-between;
    }

    &-end {
        justify-content: flex-end;
    }
}