www.moparscape.org/source/stylesheets/library/_typography.sass

!base_font_size ||= 14px
!base_font_size_small ||= 12px
!h6 = ceil(!base_font_size*1.3)
!h5 = ceil(!base_font_size*1.4)
!h4 = ceil(!base_font_size*1.7)
!h3 = ceil(!base_font_size*1.9)
!h2 = ceil(!base_font_size*2.2)
!h1 = ceil(!base_font_size*2.5)

=heading-font 
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif
=sans-font
  font-family: "Lucida Grande", "Lucida Sans Unicode", "Trebuchet MS", Helvetica, Arial, Verdana, sans-serif
=serif-font
  font-family: Times, "Times New Roman" Georgia, serif
=fixed-font
  font-family: "Menlo", "Bitstream Vera Sans", Monaco, "Andale Mono", "Lucida Console", monospace

=general-typography(!font_size = !base_font_size)
  +set-heading-sizes(!font_size)
  +typography-defaults(!font_size)

=set-heading-sizes(!font_size = !base_font_size)
  !h6 = ceil(!font_size*1.3)
  !h5 = ceil(!font_size*1.4)
  !h4 = ceil(!font_size*1.7)
  !h3 = ceil(!font_size*1.9)
  !h2 = ceil(!font_size*2.2)
  !h1 = ceil(!font_size*2.5)
  h1, h2, h3, h4
    &:first-child
      margin-top: 0
  h1
    font-size= !h1
    margin-bottom= !font_size * .765
    line-height= !h1 * 1.625
  h2
    font-size= !h2
    margin-bottom= !font_size * .855
    line-height= !h2 * 1.625
  h3
    font-size= !h3
    margin-bottom= !font_size * .956
    line-height= !h3 * 1.625
  h4
    font-size= !h4
    margin-bottom= !font_size * 1.161
    line-height= !h4 * 1.625
  h5
    font-size= !h5
    margin-bottom= !font_size * 1.238
    line-height= !h5 * 1.625
  h6
    font-size= !h6
    margin-bottom= !font_size * 1.625
    line-height= !h6 * 1.625

=typography-defaults(!font_size = !base_font_size)
  body
    line-height= ceil(!font_size * 1.625)
  p
    +p-style(!font_size)
  em, dfn
    font-style: italic
  strong, dfn
    font-weight: bold
  del
    text-decoration: line-through
  span.highlight, em.highlight, strong.highlight
    background-color: #ff6
    padding: 2px
    margin: 0 -2px
  ol li
    list-style: decimal
  ul, ol
    list-style: outside
    margin= 0 0 !font_size * 1.625
  li ul, li ol
    margin= 0 0 !font_size * 1.625
  dl
    margin= 0 0 !font_size * 1.625
    dt
      font-weight: bold
    dd
      margin-left= !font_size * 1.625
  table
    margin= 0 0 !font_size * 1.625
    border-collapse: collapse
    th
      font-weight: bold
    tr, th, td
      margin: 0
      margin= 0 !font_size * 1.625 0 !font_size
    tfoot
      font-style: italic
    caption
      text-align: center
  abbr, acronym
    border-bottom: 1px dotted
  address
    margin-top= !font_size * 1.625
    font-style: italic
  
  blockquote
    padding= !font_size !font_size !font_size * 1.625 !font_size * 1.4
    +serif-font
    font-size= !font_size * 1.2
    font-style: italic
    &:before
      content: "\201C"
      font-size= !font_size * 3
      margin= 0 0 0 -.625em
      position: absolute
      font-family: Times, Georgia, serif
      color: #aaa
      line-height: 0
    > p
      padding: 0
      margin: 0
  pre, code
    margin= !font_size * 1.625 0
    white-space: pre
  pre, code, tt
    +fixed-font
    font-size= !font_size
    line-height= !font_size * 1.5
  tt
    display: block
    margin= !font_size * 1.625 0
  hr
    margin-bottom= !font_size * 1.625
  
  small
    font-size= floor(!font_size * .85)
  big
    font-size= floor(!font_size * 1.25)

=p-style(!font_size = !base_font_size)
  padding-bottom= !font_size * 0.8125
  img
    float: left
    margin:
      top= !font_size * .5
      right= !font_size * .8125
      bottom= !font_size* .8125
      left= 0
    padding: 0
    &.right
      margin:
        right= 0
        left= !font_size * .8125