.gl.header
  line-height 1.2
  margin-bottom 0.25em
  margin-top @margin-bottom

  &.thin
    font-weight 400

  &.primary
    color $color-primary

  h1&
    font-size 3em
    line-height 1

    &:not(:only-child)
      margin-bottom 0

  h2&
    font-size 2em

  h3&
    font-size 1.5em

  h4&
    font-size 1.3em

  &.indented

    &:not([class*='top indented'])
      margin-bottom $indent

    &:not([class*='bottom indented'])
      margin-top $indent

  &.sub
    @extends .gl.divider
    font-size .9em
    margin .25em 0 0
    max-width 500px
    text-transform uppercase

  &[class*='center aligned']
    text-align center