  margin-right: auto; /* 1 */
      margin-left:  auto; /* 1 */
      max-width: 960px; /* 2 */
      padding-right: 10px; /* 3 */
      padding-left:  10px; /* 3 */
    }

    #all-dropdowns {
      flex: 1;
      z-index: 0;
      height:700px;
      padding: 35px;
      background-color: #1c5d94;
      width: 365px;

    }

    .dropdown {
      display: block;
      font-size: 18px;
      width: 260px;
    }
    .title-arboretum {
      font-size: 40px;
      display: block;
    }

    #code-select-2 {
