Typesetting with Sass

typesetting.sass

@function pem($target, $context: $em_base)
  @return #{$target / $context}em

@function prem($target, $context: $em_base)
  @return #{$target / $context}rem

@mixin setFont($face: "regular", $size: 0, $line-height: 0)
  $family: "Helvetica Neue", Arial, sans-serif
  $style: normal
  $weight: normal

  @if $face == "bold"
    $family: "Helvetica Neue", Arial, sans-serif
    $style: normal
    $weight: 700

  @else if $face == "serif"
    $family: Georgia, serif
    $style: normal
    $weight: 400

  @else if $face == "serif-italic"
    $family: Georgia, serif
    $style: italic
    $weight: 400

  @else
    $family: "Helvetica Neue", Arial, sans-serif
    $style: normal
    $weight: normal

  font:
    family: $family
    @if $size != 0
      size: prem($size)
    style: $style
    weight: $weight
  @if $line-height != 0
    line-height: pem($line-height, $size)

Example use:

p
  @include setFont("regular", 16, 23)