SOURCE CODE: Uize.Widgets.NavTree.Menu.Css

/*** menu ***/
  .`` {
    background: #ddd;
    height: 23px;
  }

  .`menuItem`,
  .`menuItem`:link,
  .`menuItem`:visited,
  .`menuItem`:hover,
  .`menuItem`:active {
    padding: 2px 10px 2px 10px;
    height: 20px;
    text-align: center;
    font-family: Arial;
    font-size: 16px;
    background: none;
    border: none;
    color: #000;
    margin: 0 1px;
    float: left;
    text-decoration: none;
    white-space: nowrap;
  }

  .`menuItemActive`,
  .`menuItemActive`:link,
  .`menuItemActive`:visited,
  .`menuItemActive`:hover,
  .`menuItemActive`:active {
    color: #fff;
    background-color: #456;
  }

  .`menuItemHasChildren`,
  .`menuItemHasChildren`:link,
  .`menuItemHasChildren`:visited,
  .`menuItemHasChildren`:hover,
  .`menuItemHasChildren`:active {
    padding-right: 20px;
    background-image: url(menu-item-has-children.gif);
    background-attachment: scroll;
    background-repeat: no-repeat;
    background-position: 95% 50%;
  }

  .`menuDivider` {
    font-size: 0;
    float: left;
    height: 20px;
    margin: 2px 4px;
    border-left: solid 1px #aaa;
    border-right: solid 1px #333;
  }

/*** submenu ***/
  .`subMenu` {
    display: none;
    position: absolute;
    padding: 5px 0;
    background: #fff;
    border: 1px solid #dee;
    border-right-color: #889094;
    border-bottom-color: #889094;
    box-shadow: 0 0 14px rgba(0,0,0,.3);
    -moz-box-shadow: 0 0 14px rgba(0,0,0,.3);
    -webkit-box-shadow: 0 0 14px rgba(0,0,0,.3);
    max-height: 630px;
    overflow: auto;
  }

  .`subMenuItem`,
  .`subMenuItem`:link,
  .`subMenuItem`:visited,
  .`subMenuItem`:hover,
  .`subMenuItem`:active
  {
    display: block;
    padding: 3px 45px 4px 10px;
    margin: 0 1px; /* NOTE: need a margin around links, or focus highlight causes menu shell to have scrollbars */
    font-family: Arial;
    font-size: 12px;
    color: #000;
    border: none;
    text-decoration: none;
    white-space: nowrap;
  }

  .`subMenuItemActive`,
  .`subMenuItemActive`:link,
  .`subMenuItemActive`:visited,
  .`subMenuItemActive`:hover,
  .`subMenuItemActive`:active
  {
    color: #fff;
    background-color: #788;
  }

  .`subMenuItemHasChildren`,
  .`subMenuItemHasChildren`:link,
  .`subMenuItemHasChildren`:visited,
  .`subMenuItemHasChildren`:hover,
  .`subMenuItemHasChildren`:active {
    background-image: url(submenu-item-has-children.gif);
    background-attachment: scroll;
    background-repeat: no-repeat;
    background-position: right center;
  }

  .`subMenuDivider` {
    font-size: 0;
    line-height: 0;
    margin: 6px 10px;
    border-top: solid 1px #ccc;
  }