* {
	box-sizing: border-box;
}

.container {
	position: relative;
}

.puzzle {
	display: inline-block;
	margin: 0 auto;
	font-size: 0px;
	border-collapse: collapse;
	border: 1px solid springgreen;
}

.piece {
	display: inline-block;
	margin: 0;
}

.clusters {
	width: 100vmin;
	position: absolute;
	top: 0;
	left: 0;
	display: inline-block;
	margin: 0 auto;
}

.cluster {
	position: absolute;
}

/* .reference {
	position: absolute;
	left: 0;
	top: 0;
	width: 100vmin;
	height: auto;
	opacity: 0.1;
} */