.nested-menu {
    .list-group-item {
      cursor: pointer;
    }
    .nested {
      list-style-type: none;
    }
    ul.submenu {
      display: none;
      height: 0;
    }
    & .expand {
      ul.submenu {
        display: block;
        list-style-type: none;
        height: auto;
        li {
          a {
            padding: 10px;
            display: block;
          }
        }
      }
    }
  }