=font-default($font-size: 18px, $line-height: ($font-size*1.6))
  font-size: $font-size
  line-height: $line-height
  font-family: 'Roboto Slab', serif
  font-weight: 300
  +media-query(1350px)
    font-size: $font-size/1.2
    line-height: $line-height/1.1
  +media-query(800px)
    font-size: $font-size/1.4
    line-height: $line-height/1.2


=font-bold($font-size: 24px, $line-height: ($font-size*1.6))
  +font-default($font-size, $line-height)
  font-weight: 700
  font-family: 'Roboto Slab', serif

=font-regular($font-size: 18px, $line-height: ($font-size*1.6))
  +font-default($font-size, $line-height)
  font-family: 'Roboto Slab', serif
  font-weight: 500