.row {
	border: 3px dashed #aaa;
	padding: 10px;
}
.row:before {
	content: ".row";
	display: block;
	margin-bottom: 6px;
	color: #aaa;
	font-weight: bold;
	font-style: italic; 
}
[class^=col-] {
	border: 3px solid #fff;
	background: #aaa;
	padding: 10px;
}
[class^=col-]:before {
	content: ".col-";
	display: block;
	margin-bottom: 6px;
	color: #fff;
	font-weight: bold;
	font-style: italic; 
}