Simplify headings

[alifeee]

For the blobs, the headings are currently embedded objects.

liputenpo.org/sona.hbs

Lines 8 to 10 in 1b602ad

	<div class="h2">
	<h2>sona</h2>
	</div>

This is not great (for my sanity)

If <main> was a column-flex item, then they would not need a wrapper element.

However, that might break other things.