treeview.css

.treeview{
	height: inherit;
}

.treeview-container{
	height: calc(100% - 20px);
    border: thin lightgray;
    border-style: solid;
    overflow-y: scroll;
	overflow-x: auto;
    width:100%;
}

.treeview-title{
	font-weight: bold;
}

.treeview-node{
	min-height: 20px;
	padding-left: 10px;
	margin-right: 0px;
}

.treeview-content,
.treeview-value{
	padding: 2px;
	-webkit-user-select: none; /* Chrome/Safari */
}
.treeview-value{
    float: right;
	padding: 4px;
	padding-left: 2px;
    min-width: 50px;
	min-height: 18px;
    text-align: left;
}

.treeview-content{
	padding: 4px;
    display: flex;
}

.treeview-simple:hover   {
	background-color: rgba(33, 33, 33, 0.05);
}
.treeview-simple{
	min-height: 20px;
	padding-left: 10px;
	margin-right: 0px;
}

.treeview-node .treeview-selected,
.treeview-container .treeview-selected{
	background-color: rgba(255, 165, 0, 0.18);
}
.treeview-node .treeview-active,
.treeview-container .treeview-active{
	background-color: rgba(255, 165, 0, 0.38);
}
.treeview-editing.treeview-selected{
	background-color: rgba(255, 0, 0, 0.5);
}

.treeview-simple > .treeview-content::before{
	content:" ";
	width: 5px;
	height: 5px;
	margin-top: 5px;
	margin-right: 8px;
	background-color: #C5C6C8;
}
:not(.treeview-simple) > .treeview-content::before{
	content:" ";
	width: 0;
	height: 0;
	margin-top: 7px;
	margin-right: 3px;
	margin-left: 0px;
	margin-bottom:3px;
	border-left: 5px solid transparent;
	border-right: 5px solid transparent;
	border-top: 5px solid #C5C6C8;
}
:not(.treeview-simple) > .treeview-content.treeview-colapse-sibling::before{
	content:" ";
	width: 0;
	height: 0;
	margin-top: 3px;
	margin-right: 0px;
	margin-left: 0px;
	margin-bottom:3px;
	padding-left: 3px;
	border-top: 5px solid transparent;
	border-bottom: 5px solid transparent;
	border-left: 5px solid #C5C6C8;
}

.treeview-colapse-sibling ~ :not(.treeview-content){
	display: none;
}