# One Variant per product; sizes are separate products

Every product in the Shopify catalog has exactly one Variant, with a single option named `Title`. Size and weight families are modelled as separate products with their own handles rather than as variants — Carnival Celebration S/M/L and Celestial S/L are five products, not two products with options.

We are keeping that model rather than re-modelling the catalogue. It is verified across all 61 products, and it materially simplifies the Cart work: there is no variant selector to design and no product needs an option-picking UI.

## Consequences

- The Cart still needs each product's Variant GID as its merchandise ID, because that is what the Cart API takes. The current `ShopProduct` carries none.
- A future engineer will assume a headless cart requires variant selectors. It does not here. Re-modelling sizes into variants later would be a catalogue migration across both storefronts, not a UI change.
- Weight is carried in the Variant title (`60gm`, `200gm`) rather than in structured options, so any code needing weight must read it from there.