Modèle:Arbre/styles.css

.treeview ul {
	padding: 0;
	margin: 0;
}
.treeview li {
	padding: 0;
	margin: 0;
	list-style-type: none;
	list-style-image: none;
}
.treeview li li {
	background: url("https://dinonews.net/wiki/images/Treeview-grey-line.png") no-repeat 0 -2981px;
	padding-left: 20px;
	text-indent: 0.3em;
}
.treeview li .lastline {
	background-position: 0 -5971px;
}
.treeview li.emptyline > ul {
	margin-left: -1px;
}
.treeview li.emptyline > ul > .mw-empty-elt:first-child + .emptyline,
.treeview li.emptyline > ul > li:first-child {
	background-position: 0 9px;
}