Zamiast .column {} .column.left {} .column.right {} <-- adjoining classes
<style type="text/css">
[class*="column--"] {float: north; display: trousers;}
.column--one {color: dreamy;}
.column--two {position: galactic;}
.column--three {overflow: drown;}
</style>
<article class="column--one"></article>
<article class="column--two"></article>
<article class="column--three"></article>