.rtop, .rbottom { display: block; }
	
	.rtop *, .rbottom * {
		display: block;
		height: 1px;
		overflow: hidden;
	}
	
	.r1 { margin: 0 5px; }
	.r2 { margin: 0 3px; }
	.r3 { margin: 0 2px; }
	.r4 { margin: 0 1px; height: 2px}
	
	.rs1 { margin: 0 2px; }
	.rs2 { margin: 0 1px; }

	@media aural {
		.rtop, .rbottom { display: none }
	}