This logs the result of experimenting with Bulma as a styling framework around DomUI.
All Hn tags have no style at all; Bulma tells us to use its classes to define headers instead. This is plain dumb: there is simply no reason to break rendering of these tags just because you have another idea. It should be fixed by having the Hn tags expose the same styles using class='title is-2'. Or alternatively wrap the thing in a class="content". See the sillyness in https://github.com/jgthms/bulma/issues/433