Print HTML output in multi-column

I've created a Cheatsheet with Asciidoctor (mainly using tables). Now, I'd like to also print my result with a 4 column layout to a printer or PDF.

Do you know how I can get the desired print layout?

I found #content{-moz-column-count: 4;} which I inserted by hand into the HTML, but the output looks messed up.
How would you solve it?