# Content Expansion — turning thin input into a finished infographic

Trigger: the source content has ≤4 sections (or < ~200 Japanese characters).
Rendering only the supplied bullets is a guaranteed sparse failure. Expand FIRST,
then lay out with the hero-poster recipe.

## Safety rules (non-negotiable)

- Never invent specifics: no made-up numbers, prices, dates, names, research claims,
  or guarantees. 「体内時計が整う」 is fine; 「体温が0.5度上がる」 is not.
- Helper sections rephrase, structure, and generalize the GIVEN idea — framing and
  practical advice, not new facts. When in doubt, phrase as a tip
  (「〜すると迷いにくい」「〜が続けやすい」), not a claim.
- Keep the user's own wording for key terms; don't rename their concepts.

## Canonical helper sections (pick 3–5 to reach 5–7 modules)

| section | what goes in | component |
|---|---|---|
| メインの手順 (hero) | the 2–4 core items as big STEP bands | hero step bands |
| なぜ効くの?/なぜ大事? | one reason per core item | two-line rowtiles |
| やらないこと / NG | inversions of the core items + a common overreach | ✕ rowtiles with →結果 sub-lines |
| できた判定 / 合格ライン | minimum version of each item ("ひと口でもOK") | ✓ rowtiles + ⭕ callout |
| 続けるコツ / 運用のコツ | environment, order, end-condition tricks | icon rowtiles |
| 3つの準備 / 始める前に | prerequisites implied by the content | tiles x3 |
| よくあるつまずき | predictable friction + one-line fix each | duo or rowtiles |
| ミニ用語 / ミニFAQ | terms the audience may not know | kv rows |
| 今日の一言 / 結論 | one-sentence philosophy of the topic | wide banner |

Selection by topic type:
- 習慣・ルーティン系 → 手順 / なぜ効く / やらない / 判定 / コツ / 一言
- ツール・機能紹介系 → できること / 使い方3ステップ / 向く場面・向かない場面 / コツ / 一言
- 考え方・概念系 → 一言でいうと / 3つの柱 / よくある誤解(NG/OK) / 使いどころ / 一言
- 告知・案内系 → 何が起きる / 対象・日程(given facts only) / 参加のしかた / 注意点 / 一言

## Density comes from SCALE, not stretching (the trap that killed past attempts)

With few modules, DO NOT enlarge whitespace to fill the canvas. Instead:
- Hero bands: full-width tinted tiles, 104px+ icon circles, 30px step titles,
  sub-line + tip pill + prop + watermark numeral per band.
- Every list item becomes two lines (bold head + small reason).
- Typography +15% across the board; title up to 100px.
- Characters get bigger and more numerous (6–8 placements, hero-size in banner).
- Interior lists distribute with `justify-content:space-evenly` inside their card —
  but only after each item already has real visual mass.

## Worked example (the shipped low sample)

Input (3 bullets): 朝起きたら水を飲む / カーテンを開ける / 1つ片づける
→ Output modules: ①3ステップ(hero bands) ②なぜ効くの? ③やらないこと ④「できた」の判定
⑤続けるコツ ⑥今日の一言 — see `samples/sample-low-density.png` in the handoff folder
(and `../legacy-html/templates/hero-poster.html` for the legacy HTML source). Every
helper section is a reframing of the three given actions; nothing factual was added.
The expanded sections feed the TEXT manifest of the Image 2.0 prompt directly.
