A12 — letter as canvas

Composes

• letter-substitution-handoff (the swap mechanic on the target letter)
• pop-in or slide on the rest of the word (lands first)

Layout

canvas: 1080x1920 (or pack-specified)

word_zone:
  anchor: center
  origin: { x: canvas_w/2, y: canvas_h/2 }
  align: center
  font_size: ~display-scale (200+ px)
  font_family: heavy sans (Inter Black or Söhne Breit)