data-size="default" — sits within the text column
An optional caption, set in condensed caps.

The hero renders between the byline and the prose body. Path A: it appears only when a hero image is set. The default size holds the article column width.

data-size="wide" — extends past the column to min(1080px, viewport)
Wide caption stays at column width.
data-size="full" — full-viewport bleed, square corners
Full-bleed caption also stays narrow.