=container
  :width = !container_width
=centered
  +container
  :margin 0 auto
=bordered
  :padding 0.2em 0.2em 0.2em 0.5em
  :border-left 2px solid #ccc
=colborder
  :border-right 1px solid #EEEEEE
  :margin-right 25px
  :padding-right 24px
=weak
  :font-size 90%
  :color = !weak_color
=strong
  :font-weight bold