nestablejs/docs/assets/css/maxSelectable.css

NestableJS is a javascript library for creating drag & drop heirarchical lists.

#container-demo {
	width: 350px;
}

#container-demo ul {
	padding: 0;
	margin: 0 0 20px 0;
	display: flex;
	flex-wrap: wrap;
	height: 300px;
	overflow: auto;	
}

#container-demo li {
	width: 50px;
	height: 50px;
	list-style: none;
	background-color: #999;
	margin: 0 5px 5px 0;
	cursor: pointer;
}

#container-demo li.ui-selected, #container-demo li.ui-selecting {
	border-color: #0054D1;
	background-color:  #0054D1;
	color: #fff;	
}