style.sass

body
  text-align        : center
  background-color  : #fff
  font-family       : lato, "myriad pro", helvetica, sans-serif

#content
  margin            : 0 auto
  width : 80%

#bingo_table
  margin: 0 auto
  font-weight : 700
  text-align : center
  vertical-align : middle

  td 
    width : 60px
    height : 60px
    border-radius: 30px
    border : 1px solid #000

  td:hover
    cursor: pointer
    background: #cacaca
    

  td.picked
    background: black
    color: white
  
  td.picked:hover
    background: gray

#result_area
  position: relative
  width: 100px
  height: 100px
  margin: 20px auto
  background: black
  color: white
  border-radius: 50px
  font-size: 48px
  text-align: center

#result
  position: absolute
  display: block
  height: 60px
  width: 60px
  margin: -30px 0 0 -30px
  top: 50%
  left: 50%