.yui3-treeview,
.yui3-treeview * {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-user-select: none;
    user-select: none;
}

.yui3-treeview-children {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* This ensures that the root node is always "open". */
.yui3-treeview-children .yui3-treeview-children { display: none; }

.yui3-treeview-indicator {
    bottom: 0;
    left: 0;
    position: absolute;
    visibility: hidden;
    top: 0;
    width: 20px;
}

.yui3-treeview-indicator s {
    border: 5px solid transparent;
    border-left-color: #afafaf;
    display: inline-block;
    *display: none; /* Hide from IE 6-7 */
    height: 5px;
    left: 6px;
    position: relative;
    top: -1px;
    vertical-align: middle;
    width: 5px;
}

.yui3-treeview-label { white-space: pre; }
.yui3-treeview-node .yui3-treeview-children { margin-left: 16px; }

.yui3-treeview-row {
    cursor: pointer;
    overflow: hidden;
    padding: 0 4px 0 20px;
    position: relative;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* -- Node states ----------------------------------------------------------- */
.yui3-treeview-can-have-children > .yui3-treeview-row > .yui3-treeview-indicator { visibility: visible; }

.yui3-treeview-open > .yui3-treeview-row > .yui3-treeview-indicator s {
    border-left-color: transparent;
    border-top-color: #afafaf;
    left: 4px;
    top: 2px;
}

.yui3-treeview-open > .yui3-treeview-children { display: block; }