.abecedaire {
  position: relative;
  background: white; }
  .abecedaire .selector {
    margin-top: 15px;
    margin-bottom: 30px; }
  .abecedaire .list-heading {
    top: 50px;
    padding-top: 15px;
    box-shadow: 0 0 10px 10px white; }
  .abecedaire .list-elements {
    margin: 15px 0 30px; }