id="dfn-chapter">chapter</dfn> is a grouping of an heading and multiple panels containing tightly related information.
					</p>
					<p>
						They split their children into a preset amount of columns: this one, for example, splits panels <b>into two columns</b>.
					</p>
					<p>
						The maximum number of columns in a chapter is 9; beyond that, you'll need to write your own chapter code.
					</p>
				</section>
				<section class="panel box" id="panel-panelheights">
					<h3>
						Panel heights
					