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.ribbon
  background-color: #a00
  overflow: hidden
  /* top left corner */
  position: absolute
  left: -3em
  top: 2.5em
  /* 45 deg ccw rotation */
  -moz-transform: rotate(-45deg)
  -webkit-transform: rotate(-45deg)
  /* shadow */
  -moz-box-shadow: 0 0 1em #888
  -webkit-box-shadow: 0 0 1em #888
  a
    border: 1px solid #faa
    color: #fff
    display: block
    font: bold 81.25% 'Helvetiva Neue', Helvetica, Arial, sans-serif
    margin: 0.05em 0 0.075em 0
    padding: 0.5em 3.5em
    text-align: center
    text-decoration: none
    /* shadow */
    text-shadow: 0 0 0.5em #444