{% comment %} HERO / media behind: an inverse band with the media filling the whole area and the copy sitting on top of it. WHEN TO USE THIS INSTEAD OF THE CENTRED OR MINIMAL HERO. When the product has a strong piece of art or a screenshot that should carry the visual weight, and the page can spare the height a full-bleed band needs. It reads as a statement, so use it once, at the top of a page, not stacked elsewhere. This one is the shipped _hero.html component with media_placement="behind": the copy and media share one grid area, copy on top, over the inverse surface with a scrim behind it (see _hero.html's own header for the CONTRAST section: a flat, not gradient, scrim, so the guarantee holds regardless of copy length or what media the caller passes). NO MEDIA IS SUPPLIED HERE. The `media` context var is genuinely optional (a text-only hero renders correctly with the same inverse band and scrim treatment): this example demonstrates the layout and the inverse-surface type contract without depending on an image asset. A caller passing real media supplies pre-rendered, safe HTML via the `media` context var (an img or an svg); brickwork does not sanitise it. Required context: none. Optional context: media (safe string, an image or illustration to fill the band; see _hero.html's own header for the full Optional context list this include accepts). States: see _hero.html's own header for the full states contract (none of its own: a static band, the CTA button carries its own states). Accessibility: see _hero.html; the heading renders as the page's own