These are a series of classes to extend when you want to clear default styles for various semantic HTML tags that have very specific/strong default style behaviour.
Removes default link colours and underlines.
menu
a.home
@extends a.no-dec
// applies no-dec to a.home.
Removes default spacing and list decoration for unordered lists and their direct li children.
menu
ul.sections
@extends ul.no-dec
// applies to ul.sections itself and it's direct li children.