sample

gistfile1.haml

*
  :padding 0
  :margin 0

body
  :font-family arial
  :font-size 13px
  :color #333
  
.container
  :width 900px
  :margin 0 auto
  
.gist
  :float left
  :width 100%
  :margin-bottom 20px
    
table
  :float left
  :width 100%
  :border-collapse collapse
  :margin-bottom 20px
  th
    :background slategrey
  td, th
    :border 1px solid #ccc
    :padding 5px
    :text-align left
    
  tr:nth-child(even)
    :background lavender