On second thought, if you're dealing with basic content (paragraphs etc.), you might get CSS columns to work: developer.mozilla.org/en-US/docs/Web/CSS/columns

Depends mostly on what you need to support though: http://caniuse.com/#feat=multicolumn

In short, it's possible using flexbox. Using flexbox, you can alter the layout without changing much in the CSS.

Have a look at this pen (http://codepen.io/nirmalyaghosh/full/yObVYr/).

I guess you're trying to implement something like this.

It's using flexbox and setting the flex-direction property to either row or column, you can achieve what you want.

Depending on the structure, you might have a look at flexbox. Is the content that's inside the article contained by an element on its own? Something like this I mean:

<article>
    <div> ... content for left column... </div>
    <div> ... content for right column... </div>
</article>

If so, you should be fine. A code example like a Codepen would help though :)

On how to use flexbox, check this article by CSS-Tricks: css-tricks.com/snippets/css/a-guide-to-flexbox

Try this code :

HTML :

<article class="content">
          <p> ...Content... </p>
<article>

CSS :

.content{
          columns : 2 ;
}