A9 — phone-card carousel

Composes

• conveyor-pan (the signature mechanic)
• sticker-chip-pop per card (tier-2, fires as each card enters the visible window)
• bg-swap on entry

Layout

canvas: 1080x1920 (or pack-specified)

outer_bg:
  color: pack.background (often black for SP-E)
  fills_canvas: true