Template:Rule/styles.css

.wst-rule {
	background-color:currentcolor;
	color:inherit;
	width:auto;
	margin:2px auto 2px auto;
	height:1px; 
	overflow:hidden; /* Needed when beside floating content and centered text. */
}
.wst-rule.wst-rule-left {
	margin-left:0;
}
.wst-rule.wst-rule-right {
	margin-right:0;
}
.wst-rule.__uirule {
	/* max-width:100%; commented pending further discussion */
	background-color:#a2a9b1;
	color:inherit;
	border:0;
	margin-top:0.2em;
	margin-bottom:0.2em;
}