<!doctype html>
<html>
	<head>
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<link href="/assets/reset.css" rel="stylesheet">
		<link href="setup.css" rel="stylesheet">
		<link href="style.css" rel="stylesheet">
	</head>
	<body>
		<ol>
			<li>
				<p>Item 1</p>
			</li>
			<li>
				<p>Item 2 <br>with line <br>breaks</p>
			</li>
			<li>
				<p>Item 3 <br>also</p>
			</li>
			<li>
				<p>Item 4</p>
			</li>
			<li>
				<p>Item 5</p>
			</li>
			<li>
				<p>Item 6 with lots of text in it that will just wrap to whatever width to show how that behaves here</p>
			</li>
			<li>
				<p>Item 7</p>
			</li>
			<li>
				<p>Item 8</p>
			</li>
			<li>
				<p>Item 9</p>
			</li>
		</ol>
	</body>
</html>
index.html
			body {
	font-family: sans-serif;
	padding: 20px;
}

ol { background-color: gold; }

li {
	background-color: tomato;
	border-bottom: 2px solid firebrick;
	border-right: 2px solid firebrick;
	padding: 5px;
}
setup.css
			ol {
	display: grid;
	grid-auto-rows: 80px;
	grid-template-columns: 1fr;
}

@media (min-width: 400px) {
	ol { grid-template-columns: 2fr 1fr; }
}

@media (min-width: 500px) {
	ol { grid-template-columns: 1fr 1fr 1fr; }
}
style.css