mixins/_font-size.scss
// Snagged from @asimpson https://gist.github.com/asimpson/3739846
$hh-base-font-multiplier: 1 !default;
@mixin font-size( $decimal-size, $keyword: null ) {
@if $keyword{ font-size: $keyword; }
@else { font-size: $decimal-size * $hh-base-font-multiplier * 16px;}
font-size: $decimal-size * 1rem;
}