me="flags" content="ahem invalid"/>
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style type="text/css"><![CDATA[
body {
	margin: 1em;
}
body>div {
	font-family: Ahem;
	font-size: 1em;
	line-height: 1em;
	color: black;
	background: yellow;
	margin: 1em 0;
	border: 1em solid gray;
	width: 15em;

	column-count: 4;
	column-gap: 1em;
	column-rule: solid blue 1em;
	column-rule: normal red 1em; /* invalid: 'normal' is not a 'border-style' */
	column: normal red 1em; /* invalid: 'column' is not