Companion

Standard rows one under the other, a rule between them — an issue's table of contents, a newsfeed. The default.

Rich cards in a horizontally scrolling carousel, sized like a shelf of covers — two whole cards at a time on a phone, three then four as the window grows, and a slice of the next. The one arrangement of articles that carries no vertical scrolling of its own, so it needs no cap inside a scrolling column or a BlockPage.

Rich cards one under the other, pairing up like list does. A card carries its own edges, so no rule separates them.