KSS Style Guide

Examples
Default styling
A div
.bwa-6
Sets all borders to 6
A div
.bwx-6
Sets left and right borders to 6
A div
.bwy-6
Sets top and bottom borders to 6
A div
.bwt-6
Sets top border to 6
A div
.bwr-6
Sets right border to 6
A div
.bwb-6
Sets bottom border to 6
A div
.bwl-6
Sets left border to 6
A div
Markup
<div class="[modifier class]">A div</div>
Source: dist/full/full.css, line 334