Do not set a width on a column, it can cause issues wit nested columns. Assume width auto instead.
Annotate grid settings and helpers
Hide overflow on root elements. Thank you Natalie Downe: http://www.slideshare.net/nataliedowne/css-systems-presentation
 Remove helpers from here, they were promoted :P
Annotate Reset
Remove $font-size and $line-height, use $base-font-size and $base-line-height instead.
Annotate Typography