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  input type="text"
    = "?"
    .message je suis un message d'aide


                @import compass

  width: 500px
  margin: 100px auto
input, .help
  float: left
  background: green
  height: 20px
  width: 20px
  margin-left: 5px
  text-align: center
  color: white
  font-weight: bold
  border-radius: 20px
  position: relative
    color: black
    position: absolute
    top: 0
    left: 30px
    display: none
    font-weight: normal
    width: 500px
    text-align: left

input:focus ~ .help
  background-color: darkblue
    display: block