vaadin-framework/themes/src/main/themes/VAADIN/themes/liferay/tree/tree.scss

@mixin liferay-tree {

.v-tree-node {
	background: transparent url(arrows_sprites.png) no-repeat -42px 1px;
}

.v-tree-node span {
	color: #336699;
	padding: 1px 2px;
	display: inline-block;
}

.v-tree-node:hover {
	background-position: -14px -30px;
}

.v-tree-node-expanded {
	background-position: -28px -14px;
}

.v-tree-node-expanded:hover {
	background-position: 0 -47px;
}

.v-tree .v-tree-node-drag-top {
	background-position: -42px 0px;
}

.v-tree .v-tree-node-drag-top.v-tree-node-expanded {
	background-position: -28px -15px;
}

.v-tree-node-selected {
	background: #333;
	-webkit-border-radius: 4px;
	-moz-border-radius: 4px;
	border-radius: 4px;
}

.v-tree-node-selected span {
	display: inline-block;
	background: transparent;
	color: #fff;
	text-shadow: -1px -1px #000;
	padding: 1px 2px;
}

.v-tree-node-caption {
	margin-left: 14px;
	padding: 1px;
}

.v-tree-node-focused {
	border: 1px dotted #555;
	padding: 0;
}

.v-tree-node-children {
	padding-left: 14px;
}

}