.dropdown {
    width: 100px;
    display: inline-block;
    background-color: #fff;
    border-radius: 2px;
    box-shadow: 0 0 2px rgb(204, 204, 204);
    transition: all .5s ease;
    position: relative;
    font-size: 14px;
    color: #474747;
    height: 35px;
    text-align: left;
  }
  .dropdown .select {
      cursor: pointer;
      display: block;
      padding: 10px
  }
  .dropdown .select > i {
      font-size: 13px;
      color: #888;
      cursor: pointer;
      transition: all .3s ease-in-out;
      float: right;
      line-height: 20px
  }
  .dropdown:hover {
      box-shadow: 0 0 4px rgb(204, 204, 204)
  }
  .dropdown:active {
      background-color: #f8f8f8
  }
  .dropdown.active:hover,
  .dropdown.active {
      box-shadow: 0 0 4px rgb(204, 204, 204);
      border-radius: 2px 2px 0 0;
      background-color: #f8f8f8
  }
  .dropdown.active .select > i {
      transform: rotate(-90deg)
  }
  .dropdown .dropdown-menu {
      position: absolute;
      background-color: #fff;
      width: 100%;
      left: 0;
      margin-top: 1px;
      box-shadow: 0 1px 2px rgb(204, 204, 204);
      border-radius: 0 1px 2px 2px;
      overflow: hidden;
      display: none;
      max-height: 144px;
      overflow-y: auto;
      z-index: 9
  }
  .dropdown .dropdown-menu li {
      padding: 10px;
      transition: all .2s ease-in-out;
      cursor: pointer
  } 
  .dropdown .dropdown-menu {
      padding: 0;
      list-style: none
  }
  .dropdown .dropdown-menu li:hover {
      background-color: #f2f2f2
  }
  .dropdown .dropdown-menu li:active {
      background-color: #e2e2e2
  }