.sidenav {
  position: fixed;
  height: 100%;
  width: 220px;
  top: 0;
  left: 0;
  background-color: #111111;
  overflow-x: hidden;
  padding-top: 20px;
    span {
      padding: 6px  8px  6px  16px;
      text-decoration: none;
      font-size: 25px;
      font-family: 'Roboto', Tahoma, Geneva, Verdana, sans-serif;
      color: #818181;
      display: block;
    }.selected {
      color: #e1e1e1;
    }:hover {
      color: #f1f1f1;
      cursor: pointer;
    }
}