KSS Style Guide

Examples
Default styling
A div
B div
C div
.fls-3-4
Sets flex-grow to 3 and flex-shrink to 4
A div
B div
C div
Markup
<div class="fld-row"><div class="[modifier class]">A div</div><div class="[modifier class]">B div</div><div class="[modifier class]">C div</div></div>
Source: dist/full/full.css, line 3257