# 文節で分かち書きしたひらがなの絵本

> 文節の間にスペースを入れた（分かち書き）縦組みのひらがな絵本。keep-allで文節をまとめて保ち、行はスペースの位置でだけ折り返します。

- HTML版: https://postext.dev/ja/cookbook/hiragana-picture-book
- レシピ No. 127 · 文字と本文 · 難易度 2 (中級) · 出力: Canvas, PDF
- ジャンル: 小説・戯曲・文芸, 写真集
- 必要なもの postext ≥ 1.16.1, postext-pdf ≥ 1.16.1 · テスト環境 1.16.1, postext-pdf 1.16.1 ／テスト日 2026-10-05
- ページ: [1](https://postext.dev/cookbook/hiragana-picture-book/en/p01.webp?v=c6b3d730), [2](https://postext.dev/cookbook/hiragana-picture-book/en/p02.webp?v=c6b3d730), [3](https://postext.dev/cookbook/hiragana-picture-book/en/p03.webp?v=c6b3d730), [4](https://postext.dev/cookbook/hiragana-picture-book/en/p04.webp?v=c6b3d730), [5](https://postext.dev/cookbook/hiragana-picture-book/en/p05.webp?v=c6b3d730), [6](https://postext.dev/cookbook/hiragana-picture-book/en/p06.webp?v=c6b3d730), [7](https://postext.dev/cookbook/hiragana-picture-book/en/p07.webp?v=c6b3d730), [8](https://postext.dev/cookbook/hiragana-picture-book/en/p08.webp?v=c6b3d730), [9](https://postext.dev/cookbook/hiragana-picture-book/en/p09.webp?v=c6b3d730), [10](https://postext.dev/cookbook/hiragana-picture-book/en/p10.webp?v=c6b3d730)
- PDF: https://postext.dev/cookbook/hiragana-picture-book/en/hiragana-picture-book.pdf?v=c6b3d730
- Sandboxで開く: https://postext.dev/ja/sandbox#recipe=hiragana-picture-book&lang=en (.postext: https://postext.dev/cookbook/hiragana-picture-book/en/hiragana-picture-book.postext)
- 最終更新: 2026-10-05
- 他の言語: [en](https://postext.dev/en/cookbook/hiragana-picture-book.md), [es](https://postext.dev/es/cookbook/hiragana-picture-book.md), [ca](https://postext.dev/ca/cookbook/hiragana-picture-book.md), [zh](https://postext.dev/zh/cookbook/hiragana-picture-book.md), [ar](https://postext.dev/ar/cookbook/hiragana-picture-book.md)

## かんたんな説明

小さな子ども向けの、すべてひらがなで書いた絵本です。言葉のまとまりごとにスペースを入れ、まとまりの途中では行を分けません。どのページにも絵が付きます。

## できあがり

このレシピのために書き、描いた10ページの絵本『かみの ふね』です。雨のあと女の子が赤い紙の舟を折り、舟はカエル、サギ、月のそばを過ぎて川を下り、海へ出ます。いちばん幼い読者向けの日本の本と同じ組み方をしています。ひらがなだけを使い、教科書体を手本にした書体Klee Oneの20 ptで組み、文節の間にスペースを入れる分かち書きにして、子どもが一度にひとまとまりずつ読めるようにします。ページは260 × 200 mmの横長で、縦組み、右綴じです。ページの上部に絵を置き、その下に8字の短い行を並べます。ページをめくるにつれて、舟は左へ進みます。

**このレシピが答える問い:**

- 絵本を文節で分かち書きし、行をスペースの位置でだけ折り返すには？
- 小書きのかな、ー、閉じかっこが行頭に来てはいけないのはなぜですか？規則の厳しさを選ぶには？
- 画面とPDFで、漢字を日本の字形で表示して日本語を組めるフォントは？

## 手短な答え

```js
// script.js, 行 41–51
// The story is typed with an ordinary space (U+0020) after each phrase (文節). Japanese
// text may break between any two kana, so the space alone does not keep a phrase whole:
// keep-all drops the breaks between two letters and keeps those at a space, after 、。」
// and before 「. Kinsoku still applies.
const phrases = { wordBreak: 'keep-all' }; // cjk.wordBreak
const bodyText = {
  fontFamily: HAND, fontSize: pt(BODY), lineHeight: pt(LEAD), color: col('ink'),
  boldColor: col('ink'), italicColor: col('ink'), referenceColor: col('ink'),
  // Ragged: a justified line would stretch its spaces and its kana to fill the tier.
  textAlign: 'left', firstLineIndent: em(0),
};
```

## 材料

**学べること**

- [仮名、漢字、ローマ字](https://postext.dev/ja/docs/japanese-layout.md#漢字かなローマ字): 日本語は1行の中で4つの文字を混ぜます。漢字、ひらがな、カタカナ、そしてラテン文字と数字（ローマ字）です。jaと指定した文書では、日本語の語のあいだにスペースを入れず、日本語と欧文のあいだに四分アキを入れ、全角のＡ１は縦組みで正立させます。書体が日本語用（Noto Serif JPやShippori Minchoなど）なら、漢字は日本の字形（フォントのlocl）になります。ローマ字のマクロン（ō ū）には、それを持つ書体が必要です。
- [縦組み](https://postext.dev/ja/docs/configuration.md#縦組み): 中国語と日本語を上から下へ、右から読む行で組みます（layout.writingMode 'vertical-rl'）。段組みは上下に積む段になり、図と表は正立したまま、約物は縦組み用の字形になります。
- [日本語の改行（禁則処理）](https://postext.dev/ja/docs/japanese-layout.md#禁則処理): 日本語は、JLReqが禁じる箇所を除き、任意の2文字のあいだで改行します。行頭には閉じ括弧、「、」「。」、小書きの仮名（ぁ ッ ャ）、「ー」、繰り返し記号（々 ゝ）、「〜」を置かず、行末には開き括弧を置かず、「――」や「……」は分割しません。jaと指定した文書はもっとも厳しい段階を使います。小書きの仮名や「ー」の行頭を許す本では、cjk.lineBreakで'ja-strict'または'ja-loose'を選びます。

**ほかに使うもの**

- [右綴じの本](https://postext.dev/ja/docs/configuration.md#綴じ)
- [文字グリッド](https://postext.dev/ja/docs/configuration.md#文字グリッド)
- [中国語・日本語・韓国語のフォント](https://postext.dev/ja/docs/configuration.md#中国語日本語韓国語のフォント)
- [1段半組み](https://postext.dev/ja/docs/configuration.md#レイアウトの種類)
- [フロート用の余白段](https://postext.dev/ja/docs/configuration.md#レイアウト)
- [独自のリソースの種類](https://postext.dev/ja/docs/configuration.md#リソースの種類)
- [ページデザインの画像](https://postext.dev/ja/docs/configuration.md#画像要素)
- [表紙、扉、奥付](https://postext.dev/ja/docs/configuration.md#見出しスタイル)
- [見出しスタイル](https://postext.dev/ja/docs/configuration.md#見出しスタイル)
- [見出しの属性](https://postext.dev/ja/docs/document-format.md#見出しの属性)
- [段落スタイル](https://postext.dev/ja/docs/configuration.md#段落スタイル)
- [改ページと改段](https://postext.dev/ja/docs/document-format.md#pagebreak)
- [用紙の色](https://postext.dev/ja/docs/configuration.md#ページ)
- [セマンティックカラーパレット](https://postext.dev/ja/docs/configuration.md#カラーパレット)
- [PDFの書き出し](https://postext.dev/ja/docs/configuration.md#pdfの生成)
- [PDFに埋め込むフォント](https://postext.dev/ja/docs/configuration.md#なぜフォントプロバイダーが必要か)
- [その場に置く図](https://postext.dev/ja/docs/document-format.md#ブロック埋め込み任意本文中への明示的な配置)
- [デザインした章扉](https://postext.dev/ja/docs/configuration.md#幅と詳細デザイン)
- [リソースとしての図と表](https://postext.dev/ja/docs/document-format.md#リソース)
- [節ごとの柱](https://postext.dev/ja/docs/configuration.md#見出しスタイル)
- [番号のない章](https://postext.dev/ja/docs/configuration.md#見出しスタイル)

**設定の一覧**

- [`bodyText`](https://postext.dev/ja/docs/configuration.md#本文), [`cjk`](https://postext.dev/ja/docs/configuration.md#東アジアの組版), [`colorPalette`](https://postext.dev/ja/docs/configuration.md#カラーパレット), [`footer`](https://postext.dev/ja/docs/configuration.md#柱とノンブル), [`header`](https://postext.dev/ja/docs/configuration.md#柱とノンブル), [`headingStyles`](https://postext.dev/ja/docs/configuration.md#見出しスタイル), [`headings`](https://postext.dev/ja/docs/configuration.md#見出し), [`layout`](https://postext.dev/ja/docs/configuration.md#レイアウト), [`locale`](https://postext.dev/ja/docs/configuration.md#ハイフネーション), [`page`](https://postext.dev/ja/docs/configuration.md#ページ), [`paragraphStyles`](https://postext.dev/ja/docs/configuration.md#段落スタイル), [`resourceTypes`](https://postext.dev/ja/docs/configuration.md#リソースの種類)

**API**

- [`buildDocument`](https://postext.dev/ja/docs/configuration.md#文書のビルド), [`clearMeasurementCache`](https://postext.dev/ja/docs/configuration.md#計測キャッシュ), [`decompressWoff2`](https://postext.dev/ja/docs/configuration.md#ブラウザー向けフォントプロバイダーfontsource--woff2), `loadVerticalAlternates`, [`registerResourceImage`](https://postext.dev/ja/docs/architecture.md#apiの概要), [`renderPageToCanvas`](https://postext.dev/ja/docs/configuration.md#ページをビットマップに描画する), [`renderToPdf`](https://postext.dev/ja/docs/configuration.md#pdfの生成)

**書体**

- Klee One (OFL-1.1), Zen Maru Gothic (OFL-1.1)

## 作り方

### 1 · 文節をまとめて保つ

コードは前の[手短な答え](#手短な答え)にあります。日本語の文はどの2つのかなの間でも改行できるので、文節の間のスペースは間を空けるだけです。それだけでは、あか|いのように行が文節の途中で終わるのを防げません。`cjk.wordBreak: 'keep-all'`は、CSSの`word-break: keep-all`と同じく、スペースの位置と約物の隣、つまり、。」のあとと「の前の改行位置だけを残します。禁則処理はそのまま適用されます（[東アジアの組版](/ja/docs/configuration#東アジアの組版)）。スペースはふつうのU+0020で、Klee Oneでは0.35 em、行末に来れば消えます。U+3000も文節の区切りになりますが、こちらは幅1 emの固定の文字で、行末でも残ります。

![Page 3.](https://postext.dev/cookbook/hiragana-picture-book/en/p03.webp?v=c6b3d730)

*3ページ：8行。どの行もスペースの位置か、」や、のあとで終わります。「いって / らっしゃい。」 / みいちゃんが / そっと てを…*

本文は不ぞろいで組みます。両端そろえにすると、短い行は段の地まで届くように、スペースとかなの間を広げてしまいます。絵本では、各行を最後の文節が終わる位置で止めます。

### 2 · 絵を本文の上の段に置く

```js
// script.js, 行 55–63
// In vertical text 'left' is the top of the page: the side column is a tier that takes
// the pictures (floats), and the text runs in the tier under it, right to left.
const layout = {
  layoutType: 'oneAndHalf', writingMode: 'vertical-rl', sideColumnRole: 'floats',
  sideColumnSide: 'left', sideColumnPercent: 58, gutterWidth: pt(2 * BODY),
};
const cjk = { ...phrases, grid: { enabled: true, charsPerLine: CHARS, linesPerPage: LINES } };
const resourceTypes = [{ id: 'picture', name: 'え', shortLabel: 'え', numberingTemplate: '{n}',
  resetOn: 'never', counterFormat: 'decimal', captionPrefix: '' }]; // pictures, no captions
```

縦組みでは`'left'`がページの上にあたるので、サイド段を左に置いた1段半組みは上下2つの段になります。絵は上の段（14字ぶんの深さ）にフロートとして入り、本文は下の段（8字）に流れます。各ページは`::resource{id="…"}`で自分の絵を引用し、`:::pagebreak`で終わります。絵のタイプにはキャプションの接頭辞がありません。絵は幅が高さの2.186倍で段と同じ形なので、どの絵も段いっぱいに収まります（[縦組み](/ja/docs/configuration#縦組み)）。

### 3 · 表紙をページ全体の絵にする

```js
// script.js, 行 67–84
// In the flow frame of a vertical page x runs down the sheet and y leftward from its right
// edge; a box's width runs down the sheet.
const at = (down, across) => ({ anchor: { to: 'page', edge: 'top-left' },
  offset: { x: mm(down), y: mm(across) } });
const cover = {
  id: 'cover', numbered: false, toc: false, span: 'page', header: { elements: [] },
  breakBefore: { enabled: true, parity: 'any' },
  advancedDesign: { enabled: true, minHeight: mm(TRIM.w - 40), slot: { elements: [
    { kind: 'image', id: 'art', resourceId: 'cover', decorative: true,
      placement: { anchor: { to: 'bleed', edge: 'top-left' },
        size: { width: mm(TRIM.h), height: mm(TRIM.w) } } },
    { kind: 'text', id: 'title', content: '{titleText}', fontFamily: ROUND, fontWeight: 700,
      fontSize: pt(60), lineHeight: 1, letterSpacing: pt(6), color: col('boat'),
      placement: at(22, 34) },
    { kind: 'text', id: 'latin', content: '{attr.latin}', fontFamily: ROUND, fontWeight: 700,
      fontSize: pt(9), lineHeight: 1.4, color: col('ink'), placement: at(22, 62) },
  ] } },
};
```

表紙はページ幅の見出しデザインです。絵はページと同じサイズで塗り足しに固定し（縦の流れでは、その`width`は紙面を縦に走ります）、題名は右側の空に、Zen Maru Gothicの60 ptで縦に組みます。

### 4 · 場面をコードで描く

```js
// script.js, 行 185–281
const W = 2186; // the art's width in its own units; its height is 1000 (ART is 2.186 : 1)
const COVER = Math.round((W * TRIM.h) / TRIM.w); // 1682: the cover is the page's shape
const P = palette;
function mulberry32(seed) {
  return () => {
    seed = (seed + 0x6d2b79f5) | 0;
    let t = Math.imul(seed ^ (seed >>> 15), 1 | seed);
    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
  };
}
const svgDoc = (body, h = 1000, w = W) => `<svg xmlns="http://www.w3.org/2000/svg" `
  + `width="${w}" height="${h}" viewBox="0 0 ${w} ${h}">${body}</svg>`;
const rect = (fill, y = 0, h = 1000, x = 0, w = W) =>
  `<rect x="${x}" y="${y}" width="${w}" height="${h}" fill="${fill}"/>`;
const wave = (y, amp, fill, seed, h = 1000, w = W) => { // a band whose top edge undulates
  const r = mulberry32(seed);
  let d = `M0 ${h} L0 ${y}`;
  for (let x = 0; x <= w; x += 120) d += ` Q${x + 60} ${y + (r() - 0.5) * 2 * amp} ${x + 120} ${y}`;
  return `<path d="${d} L${w} ${h} Z" fill="${fill}"/>`;
};
const ripples = (y0, y1, n, seed, stroke = '#ffffff') => {
  const r = mulberry32(seed);
  return Array.from({ length: n }, () => {
    const x = r() * (W - 160) + 40; const y = y0 + r() * (y1 - y0); const l = 40 + r() * 70;
    return `<path d="M${x} ${y} q${l / 2} -14 ${l} 0" fill="none" stroke="${stroke}" `
      + 'stroke-width="7" stroke-linecap="round" opacity=".7"/>';
  }).join('');
};
const boat = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + `<path d="M-95 0 L95 0 L66 42 L-66 42 Z" fill="${P.boat}"/>`
  + `<path d="M-70 0 L0 -88 L70 0 Z" fill="#e0624c"/><path d="M0 -88 L0 0" stroke="#a83322" `
  + 'stroke-width="4"/></g>';
const girl = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<path d="M-14 120 L-14 170 M14 120 L14 170" stroke="#2e2a26" stroke-width="9" '
  + 'stroke-linecap="round"/><path d="M0 40 L-55 130 L55 130 Z" fill="#e7a83c"/>'
  + '<circle cx="0" cy="0" r="40" fill="#f6d8c2"/><path d="M-42 4 Q-44 -46 0 -46 Q44 -46 42 4 '
  + 'L30 -12 Q0 -30 -30 -12 Z" fill="#2e2a26"/><circle cx="-14" cy="6" r="4" fill="#2e2a26"/>'
  + '<circle cx="14" cy="6" r="4" fill="#2e2a26"/></g>';
const frog = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<ellipse cx="0" cy="40" rx="130" ry="44" fill="#a9a39a"/>'
  + '<ellipse cx="0" cy="0" rx="62" ry="42" fill="#5f9e47"/><circle cx="-34" cy="-38" r="20" '
  + 'fill="#5f9e47"/><circle cx="34" cy="-38" r="20" fill="#5f9e47"/><circle cx="-34" cy="-40" '
  + 'r="9" fill="#2e2a26"/><circle cx="34" cy="-40" r="9" fill="#2e2a26"/>'
  + '<path d="M-26 6 Q0 22 26 6" fill="none" stroke="#2e2a26" stroke-width="5"/></g>';
const fish = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<ellipse cx="0" cy="0" rx="42" ry="20" fill="#e8893a"/><path d="M38 0 L72 -22 L72 22 Z" '
  + 'fill="#e8893a"/><circle cx="-22" cy="-4" r="5" fill="#2e2a26"/></g>';
const heron = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<path d="M0 60 L0 230" stroke="#6e675f" stroke-width="8"/>'
  + '<ellipse cx="10" cy="40" rx="70" ry="38" fill="#ffffff" stroke="#c9c2b8" stroke-width="4"/>'
  + '<path d="M-48 30 Q-80 -40 -40 -110" fill="none" stroke="#ffffff" stroke-width="20" '
  + 'stroke-linecap="round"/><circle cx="-40" cy="-114" r="20" fill="#ffffff"/>'
  + '<path d="M-58 -116 L-118 -104 L-58 -104 Z" fill="#e3b33c"/><circle cx="-44" cy="-118" '
  + 'r="4" fill="#2e2a26"/></g>';
const gull = (x, y, s = 1) => `<path d="M${x - 50 * s} ${y} q${25 * s} ${-30 * s} ${50 * s} 0 `
  + `q${25 * s} ${-30 * s} ${50 * s} 0" fill="none" stroke="#2e2a26" stroke-width="7" `
  + 'stroke-linecap="round"/>';
const disc = (x, y, r, fill) => `<circle cx="${x}" cy="${y}" r="${r}" fill="${fill}"/>`;
const stars = (n, seed) => {
  const r = mulberry32(seed);
  return Array.from({ length: n }, () => disc(r() * W, r() * 420, 3 + r() * 5, '#f7e7a8')).join('');
};
const hills = (y, fill, seed) => wave(y, 60, fill, seed);
const SCENES = {
  // The cover is the whole page, 260 × 200 mm: 2186 × 1682 units. The sky on the right
  // takes the title.
  cover: svgDoc(rect('#d9ecf2', 0, COVER) + disc(560, 260, 110, '#f6d27a')
    + wave(980, 70, P.grass, 3, COVER) + wave(1180, 24, P.river, 4, COVER)
    + ripples(1250, 1640, 22, 5) + boat(1000, 1330, 2.2), COVER),
  rain: svgDoc(rect('#e6eef0') + ripples(60, 360, 10, 7, '#9fb9c4') + rect('#f1e3c8', 640, 360)
    + `<rect x="760" y="560" width="660" height="90" rx="12" fill="#b07d53"/>`
    + girl(1260, 380, 1.4) + boat(880, 520, 0.9)),
  stream: svgDoc(rect('#e3f0f4') + hills(420, P.grass, 11) + wave(600, 22, P.river, 12)
    + ripples(650, 960, 14, 13) + girl(1800, 300, 1.5) + boat(1300, 700, 1)),
  frog: svgDoc(rect('#e3f0f4') + hills(380, P.grass, 21) + wave(560, 22, P.river, 22)
    + ripples(620, 960, 14, 23) + frog(1480, 600, 1.6) + boat(820, 760, 1)),
  bridge: svgDoc(rect('#e3f0f4') + hills(400, P.grass, 31) + wave(540, 20, P.river, 32)
    + '<path d="M300 560 Q1093 120 1886 560" fill="none" stroke="#9a6b45" stroke-width="60"/>'
    + ripples(600, 960, 12, 33) + boat(1093, 720, 1) + fish(1450, 860, 1.1) + fish(1680, 800, 0.9)
    + fish(1300, 930, 0.8)),
  heron: svgDoc(rect('#e3f0f4') + hills(300, '#a7cc8a', 41) + wave(420, 16, '#7aaec4', 42)
    + ripples(480, 960, 18, 43) + heron(1700, 230, 1.3) + boat(700, 700, 0.8)),
  dusk: svgDoc(rect('#f4c9b5') + disc(500, 520, 110, '#f29a5c') + hills(470, '#c79c87', 51)
    + wave(560, 18, '#c98f8a', 52) + ripples(600, 960, 14, 53, '#f6ddd0') + boat(1300, 760, 0.9)),
  night: svgDoc(rect('#2f3e5c') + stars(40, 61) + disc(1500, 200, 80, '#f7e7a8')
    + hills(470, '#253247', 62) + wave(560, 14, '#3f5878', 63)
    + '<path d="M1460 600 L1540 600 L1580 980 L1420 980 Z" fill="#f7e7a8" opacity=".35"/>'
    + ripples(600, 960, 12, 64, '#8aa3c2') + boat(900, 760, 0.9)),
  sea: svgDoc(rect('#d6ecf4') + disc(1700, 200, 70, '#f6d27a') + wave(420, 8, '#4f88a6', 71)
    + ripples(470, 960, 22, 72) + gull(900, 200, 1.2) + gull(1150, 140, 0.9) + boat(700, 650, 0.8)),
  window: svgDoc(rect('#efe2c8') + rect('#d6ecf4', 90, 640, 420, 1100)
    + rect('#4f88a6', 470, 260, 420, 1100) + boat(1250, 500, 0.4) + `<rect x="420" y="90" `
    + 'width="1100" height="640" fill="none" stroke="#b07d53" stroke-width="40"/><path '
    + 'd="M970 90 L970 730" stroke="#b07d53" stroke-width="24"/>' + rect('#b07d53', 730, 60)
    + girl(1750, 470, 1.6)),
};
```

10の場面は、舟、女の子、カエル、サギといった少数の形から描いたSVGです。波と星にはシード付きの乱数生成器を使うので、どのキャプチャーも同じになります。PDFでもベクターの絵です。

## レシピの全体

レシピのフォルダーから合成した1つのファイルで、サンプルのテキストとレシピ集の共通キットを埋め込んであり、自分でページを組み立てます。動かすには、空のページの`<script type="module">`に入れるか、新しいCodePenのpenのJSパネルに貼り付けます（モジュールとして）。esm.shからpostextを読み込むので、インストールもビルドも要りません。

- レシピのフォルダー: https://github.com/drnachio/postext/tree/main/cookbook/hiragana-picture-book

### script.js

```js
// ═══ Postext Cookbook · Nº 127 · A hiragana picture book, spaced by phrase ══════════
// https://postext.dev/en/cookbook/hiragana-picture-book
// Code: MIT · Story and pictures: written and drawn for the recipe (CC BY 4.0)
// Fonts: Klee One, Zen Maru Gothic (SIL OFL 1.1) · Needs postext ≥ 1.16.1
// A picture book for small readers: hiragana only, a space between phrases, vertical.
import {
  buildDocument, renderPageToCanvas, clearMeasurementCache, registerResourceImage,
  loadVerticalAlternates,
} from 'https://esm.sh/postext';
import { renderToPdf, decompressWoff2 } from 'https://esm.sh/postext-pdf';

const LANG = 'en'; // @lang: the language of the frame; the story is Japanese in both editions
const RECIPE = 'hiragana-picture-book';

// ─── 1 · Design ─────────────────────────────────────────────────────────────
// #region palette: the paper boat's red, river blues, a warm paper
const palette = {
  ink: '#2e2a26', // the text: a soft near-black
  boat: '#cf4430', // the boat, the title (4.6:1 on the paper)
  river: '#5d93ad',
  grass: '#86b665',
  muted: '#6e675f', // the colophon
  paper: '#fbf6ea',
};
const col = (id) => ({ hex: palette[id], model: 'hex', paletteId: id });
const colorPalette = [
  ...Object.entries(palette).map(([id, hex]) => ({ id, name: id, value: { hex, model: 'hex' } })),
  { id: 'main-color', name: 'boat (defaults)', value: { hex: palette.boat, model: 'hex' } },
];
// #endregion

const HAND = 'Klee One'; // 教科書体: the hand a child learns to write kana from
const ROUND = 'Zen Maru Gothic'; // the cover's title
const [BODY, LEAD] = [20, 36]; // pt: large kana, a line gap of 0.8 em
const PT = 25.4 / 72; // mm in a point
const TRIM = { w: 260, h: 200 }; // mm: a landscape picture book (横長)
const [CHARS, PICTURE, LINES] = [8, 14, 17]; // characters: text tier, picture tier; lines
const ART = { w: LINES * LEAD * PT, h: PICTURE * BODY * PT }; // mm: 215.9 × 98.8

// #region answer: わかち書き — a space between phrases, and lines that break only there
// The story is typed with an ordinary space (U+0020) after each phrase (文節). Japanese
// text may break between any two kana, so the space alone does not keep a phrase whole:
// keep-all drops the breaks between two letters and keeps those at a space, after 、。」
// and before 「. Kinsoku still applies.
const phrases = { wordBreak: 'keep-all' }; // cjk.wordBreak
const bodyText = {
  fontFamily: HAND, fontSize: pt(BODY), lineHeight: pt(LEAD), color: col('ink'),
  boldColor: col('ink'), italicColor: col('ink'), referenceColor: col('ink'),
  // Ragged: a justified line would stretch its spaces and its kana to fill the tier.
  textAlign: 'left', firstLineIndent: em(0),
};
// #endregion

// #region layout: the picture tier above, eight characters of text below it
// In vertical text 'left' is the top of the page: the side column is a tier that takes
// the pictures (floats), and the text runs in the tier under it, right to left.
const layout = {
  layoutType: 'oneAndHalf', writingMode: 'vertical-rl', sideColumnRole: 'floats',
  sideColumnSide: 'left', sideColumnPercent: 58, gutterWidth: pt(2 * BODY),
};
const cjk = { ...phrases, grid: { enabled: true, charsPerLine: CHARS, linesPerPage: LINES } };
const resourceTypes = [{ id: 'picture', name: 'え', shortLabel: 'え', numberingTemplate: '{n}',
  resetOn: 'never', counterFormat: 'decimal', captionPrefix: '' }]; // pictures, no captions
// #endregion

// #region cover: the first picture across the page, the title down its sky
// In the flow frame of a vertical page x runs down the sheet and y leftward from its right
// edge; a box's width runs down the sheet.
const at = (down, across) => ({ anchor: { to: 'page', edge: 'top-left' },
  offset: { x: mm(down), y: mm(across) } });
const cover = {
  id: 'cover', numbered: false, toc: false, span: 'page', header: { elements: [] },
  breakBefore: { enabled: true, parity: 'any' },
  advancedDesign: { enabled: true, minHeight: mm(TRIM.w - 40), slot: { elements: [
    { kind: 'image', id: 'art', resourceId: 'cover', decorative: true,
      placement: { anchor: { to: 'bleed', edge: 'top-left' },
        size: { width: mm(TRIM.h), height: mm(TRIM.w) } } },
    { kind: 'text', id: 'title', content: '{titleText}', fontFamily: ROUND, fontWeight: 700,
      fontSize: pt(60), lineHeight: 1, letterSpacing: pt(6), color: col('boat'),
      placement: at(22, 34) },
    { kind: 'text', id: 'latin', content: '{attr.latin}', fontFamily: ROUND, fontWeight: 700,
      fontSize: pt(9), lineHeight: 1.4, color: col('ink'), placement: at(22, 62) },
  ] } },
};
// #endregion

const config = () => ({ // a factory: the engine caches resolved configs per object
  locale: 'ja', // written out, never LANG (gotcha: ja-locale-tag)
  colorPalette,
  resourceTypes,
  page: {
    sizePreset: 'custom', width: mm(TRIM.w), height: mm(TRIM.h), dpi: 150,
    backgroundColor: col('paper'),
    margins: { top: mm(14), bottom: mm(16), left: mm(22), right: mm(22), mirror: true },
  },
  layout,
  cjk,
  bodyText,
  headings: { fontFamily: ROUND, color: col('boat'),
    levels: [{ level: 1, breakBefore: { enabled: true, parity: 'any' } }] }, // the H1 break
  headingStyles: [cover],
  paragraphStyles: [
    { id: 'end', fontFamily: ROUND, fontWeight: 700, color: col('boat'), textAlign: 'right',
      marginTop: pt(LEAD) }, // おしまい at the foot of its line
    { id: 'colophon', fontFamily: HAND, fontSize: pt(7.5), lineHeight: pt(LEAD),
      color: col('muted'), textAlign: 'left', marginTop: pt(LEAD) },
  ],
  header: { elements: [] }, // a picture book has no running heads and no folios
  footer: { elements: [] },
});

// ─── 2 · Content ────────────────────────────────────────────────────────────
const markdown = String.raw`---
title: "かみの ふね"
author: "Postext Cookbook"
---

# かみの ふね {style="cover" latin="The Paper Boat: a picture book in hiragana"}

::resource{id="rain"}

あめが やんだ あさ、みいちゃんは あかい かみで ふねを おりました。

:::pagebreak

::resource{id="stream"}

「いって らっしゃい。」みいちゃんが そっと てを はなすと、ふねは すいすい ながれて いきました。

:::pagebreak

::resource{id="frog"}

いしの うえで、かえるが ききました。「どこへ いくの。」「うみまで。」と、ふねは こたえました。

:::pagebreak

::resource{id="bridge"}

はしの したを くぐると、ちいさな さかなが ついて きました。ぴちゃん、ぴちゃん。

:::pagebreak

::resource{id="heron"}

かわは だんだん ひろく なりました。きしでは さぎが いっぽんあしで みおくって います。

:::pagebreak

::resource{id="dusk"}

ゆうがた、そらが ももいろに そまりました。かぜの なかに、うみの においが します。

:::pagebreak

::resource{id="night"}

よるに なりました。おつきさまが みずに うつって、ふねの みちを てらして くれました。

:::pagebreak

::resource{id="sea"}

あさ、ふねは ひろい うみに でました。かもめが「ようこそ。」と いいました。

:::pagebreak

::resource{id="window"}

とおくの まちで、みいちゃんも まどを あけて、うみの ほうを みて いました。

:::paragraphs{style="end"}
おしまい
:::

:::paragraphs{style="colophon"}
Story and pictures written and drawn for this recipe (CC BY 4.0) · Set in Klee One and Zen Maru Gothic (SIL OFL)
:::
`; // content.<lang>.md, a space after each phrase

// ─── 3 · Fonts ──────────────────────────────────────────────────────────────
const FONTS = { 'Klee One': ['400'], 'Zen Maru Gothic': ['700'] };

// #region art: ten scenes drawn in code, a seeded hand for the waves and the stars
const W = 2186; // the art's width in its own units; its height is 1000 (ART is 2.186 : 1)
const COVER = Math.round((W * TRIM.h) / TRIM.w); // 1682: the cover is the page's shape
const P = palette;
function mulberry32(seed) {
  return () => {
    seed = (seed + 0x6d2b79f5) | 0;
    let t = Math.imul(seed ^ (seed >>> 15), 1 | seed);
    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
  };
}
const svgDoc = (body, h = 1000, w = W) => `<svg xmlns="http://www.w3.org/2000/svg" `
  + `width="${w}" height="${h}" viewBox="0 0 ${w} ${h}">${body}</svg>`;
const rect = (fill, y = 0, h = 1000, x = 0, w = W) =>
  `<rect x="${x}" y="${y}" width="${w}" height="${h}" fill="${fill}"/>`;
const wave = (y, amp, fill, seed, h = 1000, w = W) => { // a band whose top edge undulates
  const r = mulberry32(seed);
  let d = `M0 ${h} L0 ${y}`;
  for (let x = 0; x <= w; x += 120) d += ` Q${x + 60} ${y + (r() - 0.5) * 2 * amp} ${x + 120} ${y}`;
  return `<path d="${d} L${w} ${h} Z" fill="${fill}"/>`;
};
const ripples = (y0, y1, n, seed, stroke = '#ffffff') => {
  const r = mulberry32(seed);
  return Array.from({ length: n }, () => {
    const x = r() * (W - 160) + 40; const y = y0 + r() * (y1 - y0); const l = 40 + r() * 70;
    return `<path d="M${x} ${y} q${l / 2} -14 ${l} 0" fill="none" stroke="${stroke}" `
      + 'stroke-width="7" stroke-linecap="round" opacity=".7"/>';
  }).join('');
};
const boat = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + `<path d="M-95 0 L95 0 L66 42 L-66 42 Z" fill="${P.boat}"/>`
  + `<path d="M-70 0 L0 -88 L70 0 Z" fill="#e0624c"/><path d="M0 -88 L0 0" stroke="#a83322" `
  + 'stroke-width="4"/></g>';
const girl = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<path d="M-14 120 L-14 170 M14 120 L14 170" stroke="#2e2a26" stroke-width="9" '
  + 'stroke-linecap="round"/><path d="M0 40 L-55 130 L55 130 Z" fill="#e7a83c"/>'
  + '<circle cx="0" cy="0" r="40" fill="#f6d8c2"/><path d="M-42 4 Q-44 -46 0 -46 Q44 -46 42 4 '
  + 'L30 -12 Q0 -30 -30 -12 Z" fill="#2e2a26"/><circle cx="-14" cy="6" r="4" fill="#2e2a26"/>'
  + '<circle cx="14" cy="6" r="4" fill="#2e2a26"/></g>';
const frog = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<ellipse cx="0" cy="40" rx="130" ry="44" fill="#a9a39a"/>'
  + '<ellipse cx="0" cy="0" rx="62" ry="42" fill="#5f9e47"/><circle cx="-34" cy="-38" r="20" '
  + 'fill="#5f9e47"/><circle cx="34" cy="-38" r="20" fill="#5f9e47"/><circle cx="-34" cy="-40" '
  + 'r="9" fill="#2e2a26"/><circle cx="34" cy="-40" r="9" fill="#2e2a26"/>'
  + '<path d="M-26 6 Q0 22 26 6" fill="none" stroke="#2e2a26" stroke-width="5"/></g>';
const fish = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<ellipse cx="0" cy="0" rx="42" ry="20" fill="#e8893a"/><path d="M38 0 L72 -22 L72 22 Z" '
  + 'fill="#e8893a"/><circle cx="-22" cy="-4" r="5" fill="#2e2a26"/></g>';
const heron = (x, y, s = 1) => `<g transform="translate(${x} ${y}) scale(${s})">`
  + '<path d="M0 60 L0 230" stroke="#6e675f" stroke-width="8"/>'
  + '<ellipse cx="10" cy="40" rx="70" ry="38" fill="#ffffff" stroke="#c9c2b8" stroke-width="4"/>'
  + '<path d="M-48 30 Q-80 -40 -40 -110" fill="none" stroke="#ffffff" stroke-width="20" '
  + 'stroke-linecap="round"/><circle cx="-40" cy="-114" r="20" fill="#ffffff"/>'
  + '<path d="M-58 -116 L-118 -104 L-58 -104 Z" fill="#e3b33c"/><circle cx="-44" cy="-118" '
  + 'r="4" fill="#2e2a26"/></g>';
const gull = (x, y, s = 1) => `<path d="M${x - 50 * s} ${y} q${25 * s} ${-30 * s} ${50 * s} 0 `
  + `q${25 * s} ${-30 * s} ${50 * s} 0" fill="none" stroke="#2e2a26" stroke-width="7" `
  + 'stroke-linecap="round"/>';
const disc = (x, y, r, fill) => `<circle cx="${x}" cy="${y}" r="${r}" fill="${fill}"/>`;
const stars = (n, seed) => {
  const r = mulberry32(seed);
  return Array.from({ length: n }, () => disc(r() * W, r() * 420, 3 + r() * 5, '#f7e7a8')).join('');
};
const hills = (y, fill, seed) => wave(y, 60, fill, seed);
const SCENES = {
  // The cover is the whole page, 260 × 200 mm: 2186 × 1682 units. The sky on the right
  // takes the title.
  cover: svgDoc(rect('#d9ecf2', 0, COVER) + disc(560, 260, 110, '#f6d27a')
    + wave(980, 70, P.grass, 3, COVER) + wave(1180, 24, P.river, 4, COVER)
    + ripples(1250, 1640, 22, 5) + boat(1000, 1330, 2.2), COVER),
  rain: svgDoc(rect('#e6eef0') + ripples(60, 360, 10, 7, '#9fb9c4') + rect('#f1e3c8', 640, 360)
    + `<rect x="760" y="560" width="660" height="90" rx="12" fill="#b07d53"/>`
    + girl(1260, 380, 1.4) + boat(880, 520, 0.9)),
  stream: svgDoc(rect('#e3f0f4') + hills(420, P.grass, 11) + wave(600, 22, P.river, 12)
    + ripples(650, 960, 14, 13) + girl(1800, 300, 1.5) + boat(1300, 700, 1)),
  frog: svgDoc(rect('#e3f0f4') + hills(380, P.grass, 21) + wave(560, 22, P.river, 22)
    + ripples(620, 960, 14, 23) + frog(1480, 600, 1.6) + boat(820, 760, 1)),
  bridge: svgDoc(rect('#e3f0f4') + hills(400, P.grass, 31) + wave(540, 20, P.river, 32)
    + '<path d="M300 560 Q1093 120 1886 560" fill="none" stroke="#9a6b45" stroke-width="60"/>'
    + ripples(600, 960, 12, 33) + boat(1093, 720, 1) + fish(1450, 860, 1.1) + fish(1680, 800, 0.9)
    + fish(1300, 930, 0.8)),
  heron: svgDoc(rect('#e3f0f4') + hills(300, '#a7cc8a', 41) + wave(420, 16, '#7aaec4', 42)
    + ripples(480, 960, 18, 43) + heron(1700, 230, 1.3) + boat(700, 700, 0.8)),
  dusk: svgDoc(rect('#f4c9b5') + disc(500, 520, 110, '#f29a5c') + hills(470, '#c79c87', 51)
    + wave(560, 18, '#c98f8a', 52) + ripples(600, 960, 14, 53, '#f6ddd0') + boat(1300, 760, 0.9)),
  night: svgDoc(rect('#2f3e5c') + stars(40, 61) + disc(1500, 200, 80, '#f7e7a8')
    + hills(470, '#253247', 62) + wave(560, 14, '#3f5878', 63)
    + '<path d="M1460 600 L1540 600 L1580 980 L1420 980 Z" fill="#f7e7a8" opacity=".35"/>'
    + ripples(600, 960, 12, 64, '#8aa3c2') + boat(900, 760, 0.9)),
  sea: svgDoc(rect('#d6ecf4') + disc(1700, 200, 70, '#f6d27a') + wave(420, 8, '#4f88a6', 71)
    + ripples(470, 960, 22, 72) + gull(900, 200, 1.2) + gull(1150, 140, 0.9) + boat(700, 650, 0.8)),
  window: svgDoc(rect('#efe2c8') + rect('#d6ecf4', 90, 640, 420, 1100)
    + rect('#4f88a6', 470, 260, 420, 1100) + boat(1250, 500, 0.4) + `<rect x="420" y="90" `
    + 'width="1100" height="640" fill="none" stroke="#b07d53" stroke-width="40"/><path '
    + 'd="M970 90 L970 730" stroke="#b07d53" stroke-width="24"/>' + rect('#b07d53', 730, 60)
    + girl(1750, 470, 1.6)),
};
// #endregion
const pictures = Object.keys(SCENES).map((id) => ({ id, typeId: 'picture', kind: 'svg',
  createdAt: 0, updatedAt: 0, placement: { span: 'side' },
  svg: { fileId: `${id}.svg`, width: W, height: id === 'cover' ? COVER : 1000 } }));

// ─── 4 · Build & show ───────────────────────────────────────────────────────
await loadFonts(FONTS, markdown);
await loadCjkFonts({ [HAND]: FONTS[HAND] }, markdown, { vertical: true });
await loadCjkFonts({ [ROUND]: FONTS[ROUND] }, 'かみのふねおしまい', { vertical: true });
await Promise.all(Object.entries(SCENES).map(([id, svg]) => loadSvg(`${id}.svg`, svg)));
const doc = await buildWithFonts(
  () => buildDocument({ markdown, resources: pictures }, config()), markdown);
showBook(doc, { title: t({ en: 'A hiragana picture book',
  es: 'Un libro ilustrado en hiragana' }) });
offerPdf(() => renderToPdf(doc, { fontProvider: cjkPdfProvider, resourceBytes: imageBytes }),
  `${RECIPE}.pdf`);

// ─── Kit ── helpers shared by every Cookbook recipe · postext.dev/cookbook ─────

// ─── Kit · core v1 ── the same in every recipe · postext.dev/cookbook ─────────
function mm(value) { return { value, unit: 'mm' }; }
function pt(value) { return { value, unit: 'pt' }; }
function em(value) { return { value, unit: 'em' }; }
/** The sample language's string: t({ en: 'Figure', es: 'Figura' }). */
function t(strings) { return strings[LANG] ?? Object.values(strings)[0]; }
/** A file in this recipe's assets folder, served from the Postext repo by jsDelivr. */
function asset(file) { return `https://cdn.jsdelivr.net/gh/drnachio/postext@main/cookbook/${RECIPE}/assets/${file}`; }

// ─── Kit · fonts v1 ── the same in every recipe · postext.dev/cookbook ────────
// Postext measures text with the faces the browser has loaded, and caches the
// widths, so every face must be ready before the first build. Faces come from
// Fontsource: the same static files the PDF embeds, so screen and PDF agree.

/** faces = { 'Family Name': ['400', '400i', '700'] }. `text` is the sample:
 *  letters beyond Latin-1 (č, ł, ő…) also load the latin-ext files. With
 *  `optional`, a face Fontsource does not ship is skipped instead of failing.
 *  Resolves to the number of faces added. */
async function loadFonts(faces, text = '', { optional = false } = {}) {
  kitStatus('Loading fonts…');
  const ranges = {
    latin: 'U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,'
      + 'U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD',
    'latin-ext': 'U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,'
      + 'U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF',
  };
  const subsets = /[Ā-˿Ḁ-ỿ]/.test(text) ? ['latin', 'latin-ext'] : ['latin'];
  const jobs = [];
  let added = 0;
  for (const [family, specs] of Object.entries(faces)) {
    const id = fontsourceId(family);
    const meta = optional ? await fontsourceMeta(family) : null;
    for (const spec of new Set(specs)) {
      const weight = parseInt(spec, 10);
      const style = spec.endsWith('i') ? 'italic' : 'normal';
      if (hasFace(family, weight, style)) continue;
      if (optional && !(meta?.weights.includes(weight) && meta.styles.includes(style))) continue;
      for (const subset of subsets) {
        const url = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-${subset}-${weight}-${style}.woff2`;
        const face = new FontFace(family, `url(${url}) format('woff2')`,
          { weight: String(weight), style, unicodeRange: ranges[subset] });
        jobs.push(face.load().then((ready) => { document.fonts.add(ready); added++; }, () => {
          if (subset === 'latin' && !optional) throw new Error(`Fontsource has no ${family} ${weight} ${style}`);
        }));
      }
    }
  }
  await Promise.all(jobs).catch((error) => { kitFail(error); throw error; });
  return added;
}

/** Runs `build` (a buildDocument or buildBundle call) and checks the faces
 *  the pages use. A regular face missing from FONTS is loaded with a warning;
 *  bold and italic variants are loaded when the family ships them. Then the
 *  measurement caches are cleared and the build runs again. */
async function buildWithFonts(build, text = '') {
  const tried = new Set();
  for (let round = 0; round < 3; round++) {
    kitStatus('Laying out…');
    await new Promise(requestAnimationFrame);          // let the status paint first
    const result = await Promise.resolve().then(build).catch((error) => { kitFail(error); throw error; });
    const wanted = { base: {}, variants: {} };
    for (const { font, base } of [result].flat().flatMap(fontStringsOf)) {
      const { family, weight, style } = parseFont(font);
      const key = `${family}|${weight}|${style}`;
      if (tried.has(key) || hasFace(family, weight, style)) continue;
      tried.add(key);
      (wanted[base ? 'base' : 'variants'][family] ??= []).push(`${weight}${style === 'italic' ? 'i' : ''}`);
    }
    if (Object.keys(wanted.base).length) {
      console.warn(`[cookbook] FONTS does not list ${JSON.stringify(wanted.base)}: loading them.`);
    }
    const added = await loadFonts(wanted.base, text) + await loadFonts(wanted.variants, text, { optional: true });
    if (added === 0) return result;
    clearMeasurementCache();
  }
  throw new Error('The fonts did not settle after three builds.');
}

/** Every font string of the layout. `base` marks a block's own face; its
 *  bold, italic and bold-italic variants are listed whether or not used. */
function fontStringsOf(doc) {
  const found = new Map();
  const walk = (node) => {
    if (!node || typeof node !== 'object') return;
    if (Array.isArray(node)) { node.forEach(walk); return; }
    for (const [key, value] of Object.entries(node)) {
      if (typeof value === 'string' && /fontString$/i.test(key)) {
        found.set(value, found.get(value) || key === 'fontString');
      } else if (value && typeof value === 'object') walk(value);
    }
  };
  walk(doc.pages);
  walk(doc.blocks);
  return [...found].map(([font, base]) => ({ font, base }));
}

/** '700 37.5px Open Sans' / 'italic 400 13px "Source Serif 4"' → { family, weight, style }.
 *  A string with no weight ('95.8px Young Serif', from a design text) is 400. */
function parseFont(font) {
  const m = /^(?:(italic|oblique)\s+)?(?:small-caps\s+)?(?:(\d+|bold|normal)\s+)?[\d.]+px\s+(.+)$/.exec(font.trim());
  if (!m) throw new Error(`Unexpected font string: ${font}`);
  const weight = m[2] === 'bold' ? 700 : !m[2] || m[2] === 'normal' ? 400 : Number(m[2]);
  return { family: m[3].replace(/^["']|["']$/g, ''), weight, style: m[1] ? 'italic' : 'normal' };
}

/** True when a loaded FontFace covers exactly this family, weight and style
 *  (document.fonts.check() is also true for families nobody declared). */
function hasFace(family, weight, style) {
  for (const face of document.fonts) {
    if (face.status !== 'loaded' || face.style !== style) continue;
    if (face.family.replace(/^["']|["']$/g, '') !== family) continue;
    const [low, high = low] = face.weight.split(' ').map(Number);
    if (weight >= low && weight <= high) return true;
  }
  return false;
}

/** Fontsource's id for a family: 'Source Serif 4' → 'source-serif-4'. */
function fontsourceId(family) { return family.toLowerCase().replace(/\s+/g, '-'); }

/** The weights and styles a family ships ({ weights: [400, 700], styles: ['normal', 'italic'] }), or null. */
function fontsourceMeta(family) {
  fontsourceMeta.cache ??= new Map();
  const id = fontsourceId(family);
  if (!fontsourceMeta.cache.has(id)) {
    fontsourceMeta.cache.set(id, fetch(`https://api.fontsource.org/v1/fonts/${id}`)
      .then((res) => (res.ok ? res.json() : null), () => null));
  }
  return fontsourceMeta.cache.get(id);
}

// ─── Kit · viewer v1 ── the same in every recipe · postext.dev/cookbook ───────
/** Shows the pages as facing spreads on a dark desk: the first page is a
 *  recto on its own, then verso | recto pairs, as in a bound book. Pages
 *  are painted when they scroll near the screen. */
function showPages(docs, { title, width = 460 } = {}) {
  const root = viewer(title);
  const pages = [docs].flat().flatMap((doc) =>
    doc.pages.map((page) => ({ doc, page, n: (doc.pageIndexOffset ?? 0) + page.index })));
  const spreads = [];
  let verso = null;
  for (const p of pages) {
    if (p.n % 2 === 1) { if (verso) spreads.push([verso, null]); verso = p; }
    else { spreads.push([verso, p]); verso = null; }
  }
  if (verso) spreads.push([verso, null]);
  const density = Math.min(window.devicePixelRatio || 1, 2);
  showPages.painter?.disconnect();
  const painter = new IntersectionObserver((entries) => {
    for (const { isIntersecting, target } of entries) {
      if (!isIntersecting) continue;
      painter.unobserve(target);
      const { doc, page } = target.postext;
      renderPageToCanvas(page, doc, target, { scale: (width * density) / page.width });
    }
  }, { rootMargin: '800px' });
  showPages.painter = painter;
  root.replaceChildren(...spreads.map((pair) => {
    const spread = document.createElement('div');
    spread.className = 'pt-spread';
    for (const p of pair) {
      const figure = document.createElement('figure');
      if (p) {
        const label = p.page.pageLabel || String(p.n + 1);
        const canvas = document.createElement('canvas');
        canvas.postext = p;
        canvas.style.aspectRatio = `${p.page.width} / ${p.page.height}`;
        canvas.setAttribute('role', 'img');
        canvas.setAttribute('aria-label', `Page ${label}`);
        const folio = document.createElement('figcaption');
        folio.textContent = label;
        figure.append(canvas, folio);
        painter.observe(canvas);
      } else figure.className = 'pt-blank';
      spread.append(figure);
    }
    return spread;
  }));
  kitStatus(`${pages.length} ${pages.length === 1 ? 'page' : 'pages'}`);
  document.documentElement.dataset.postext = 'ready';
  return pages.length;
}

/** The desk, the bar and the error reporting, created once. */
function viewer(title) {
  if (!document.getElementById('pt-kit')) {
    document.head.insertAdjacentHTML('beforeend', `<style id="pt-kit">
      :root { color-scheme: dark; }
      body { margin: 0; background: #0e1014; color: #b9bcc4; font: 13px/1.45 system-ui, sans-serif; }
      #pt-bar { position: sticky; top: 0; z-index: 1; display: flex; flex-wrap: wrap; align-items: center;
        gap: 6px 16px; padding: 10px 16px; background: rgb(14 16 20 / .92); backdrop-filter: blur(6px);
        border-bottom: 1px solid #23262d; }
      #pt-bar strong { color: #f4f1ea; font-weight: 600; }
      #pt-actions { display: flex; gap: 12px; margin-left: auto; }
      #pt-actions a, #pt-actions button { color: #d8a21a; font: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
      #pages { display: grid; justify-items: center; gap: 48px; padding: 32px 16px 72px; }
      .pt-spread { display: flex; }
      .pt-spread figure { margin: 0; width: min(460px, 44vw); }
      .pt-spread canvas { display: block; width: 100%; background: #fff;
        box-shadow: 0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
      .pt-spread figure:first-child canvas { box-shadow: inset -14px 0 14px -14px rgb(0 0 0 / .18), 0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
      .pt-spread figcaption { margin-top: 10px; text-align: center; font: 600 10px/1 system-ui, sans-serif;
        letter-spacing: .18em; text-transform: uppercase; color: #6c7079; }
      .pt-blank { visibility: hidden; }
      @media (max-width: 760px) {
        .pt-spread { flex-direction: column; gap: 32px; }
        .pt-spread figure { width: min(460px, 92vw); }
        .pt-blank { display: none; }
      }
    </style>`);
    document.body.insertAdjacentHTML('afterbegin',
      '<header id="pt-bar"><strong id="pt-title"></strong><span id="pt-status" role="status"></span><span id="pt-actions"></span></header>');
    document.getElementById('pt-title').textContent = document.title || 'Postext';
    addEventListener('error', (event) => kitFail(event.error ?? event.message));
    addEventListener('unhandledrejection', (event) => kitFail(event.reason));
  }
  if (title) document.getElementById('pt-title').textContent = title;
  return document.getElementById('pages')
    ?? document.body.appendChild(Object.assign(document.createElement('main'), { id: 'pages' }));
}

function kitStatus(text) {
  viewer();
  document.getElementById('pt-status').textContent = text;
}

function kitFail(error) {
  document.documentElement.dataset.postext = 'error';
  kitStatus(`Error: ${error?.message ?? error}`);
}

// ─── Kit · pdf v1 ── the same in every recipe that exports a PDF ──────────────
/** postext-pdf embeds TrueType bytes. Fetch the Fontsource file the screen
 *  used, snapping to a weight the family ships and falling back to upright
 *  when it has no italic: the PDF asks for every face a block could use. */
async function fontsourceProvider(family, weight, style) {
  const id = fontsourceId(family);
  const meta = await fontsourceMeta(family);
  const weights = meta?.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && meta && !meta.styles.includes('italic') ? 'normal' : style;
  const res = await fetch(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-${w}-${s}.woff2`);
  if (!res.ok) throw new Error(`Fontsource has no ${family} ${w} ${s} (${res.status})`);
  return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
}

/** A "Build the PDF" button in the bar. Once built: "Open the PDF" (a new
 *  tab, since CodePen's preview frame cannot show PDFs) and a download link. */
function offerPdf(makePdf, filename) {
  viewer();
  const button = Object.assign(document.createElement('button'), { type: 'button', textContent: 'Build the PDF' });
  button.dataset.postextPdf = filename;
  button.addEventListener('click', async () => {
    button.disabled = true;
    button.textContent = 'Building the PDF…';
    try {
      const bytes = await makePdf();
      const url = URL.createObjectURL(new Blob([bytes], { type: 'application/pdf' }));
      const size = `${Math.max(1, Math.round(bytes.length / 1024))} KB`;
      button.replaceWith(
        Object.assign(document.createElement('a'), { href: url, target: '_blank', rel: 'noopener', textContent: 'Open the PDF ↗' }),
        Object.assign(document.createElement('a'), { href: url, download: filename, textContent: `Download ${filename} · ${size}` }));
    } catch (error) {
      button.disabled = false;
      button.textContent = 'Build the PDF';
      kitFail(error);
    }
  });
  document.getElementById('pt-actions').append(button);
}

// ─── Kit · images v1 ── recipes with pictures · postext.dev/cookbook ──────────
/** Registers a photo or PNG for the canvas and keeps its bytes for the PDF.
 *  fetch → ImageBitmap never taints the canvas (a plain cross-origin <img> would). */
async function loadImage(fileId, url) {
  const res = await fetch(url);
  if (!res.ok) throw new Error(`Image not found (${res.status}): ${url}`);
  const bytes = new Uint8Array(await res.arrayBuffer());
  registerResourceImage(fileId, await createImageBitmap(new Blob([bytes])));
  (loadImage.bytes ??= new Map()).set(fileId, bytes);
}

/** Registers SVG markup (drawn in code, or fetched) as a vector image. */
async function loadSvg(fileId, svg) {
  const img = new Image();
  img.src = `data:image/svg+xml;charset=utf-8,${encodeURIComponent(svg)}`;
  await img.decode();
  registerResourceImage(fileId, img);
  (loadImage.bytes ??= new Map()).set(fileId, new TextEncoder().encode(svg));
}

/** renderToPdf({ resourceBytes: imageBytes }) */
function imageBytes(fileId) { return loadImage.bytes?.get(fileId); }

/** renderToHtml({ resourceImageUrl: imageUrl }) */
function imageUrl(fileId) {
  const bytes = imageBytes(fileId);
  if (!bytes) return undefined;
  imageUrl.urls ??= new Map();
  if (!imageUrl.urls.has(fileId)) {
    const type = /\.svg$/i.test(fileId) ? 'image/svg+xml' : /\.png$/i.test(fileId) ? 'image/png' : 'image/jpeg';
    imageUrl.urls.set(fileId, URL.createObjectURL(new Blob([bytes], { type })));
  }
  return imageUrl.urls.get(fileId);
}

// ─── Kit · cjk v1 ── Chinese, Japanese and Korean books · postext.dev/cookbook ─
// Fontsource ships a CJK family as about a hundred files per weight, each
// declared in its stylesheet with the unicode-range it covers. The screen
// loads the files the sample touches; the PDF gets the same files for the
// characters its pages set in each face, and embeds each as a subset.
// A book bound on the right (vertical text) is shown with its spreads
// mirrored: page 1 alone on the left of the spine, then [3 | 2].

/** The files of a Fontsource face, read from its stylesheet: { url, range,
 *  ranges }, the last declared first (the order the browser tries them in). */
function cjkSlices(family, weight, style) {
  cjkSlices.cache ??= new Map();
  const id = fontsourceId(family);
  const css = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/${weight}${style === 'italic' ? '-italic' : ''}.css`;
  if (!cjkSlices.cache.has(css)) {
    cjkSlices.cache.set(css, fetch(css)
      .then((res) => {
        if (!res.ok) throw new Error(`Fontsource has no ${family} ${weight} ${style} (${res.status})`);
        return res.text();
      })
      .then((text) => [...text.matchAll(/@font-face\s*{([^}]*)}/g)].map(([, rule]) => {
        const range = /unicode-range:\s*([^;]+);/.exec(rule)?.[1].trim() ?? 'U+0-10FFFF';
        const ranges = range.split(',').map((part) => {
          const [lo, hi = lo] = part.trim().slice(2).split('-');
          return [parseInt(lo, 16), parseInt(hi, 16)];
        });
        return { url: new URL(/url\(([^)]+?\.woff2)\)/.exec(rule)[1], css).href, range, ranges };
      }).reverse()));
  }
  return cjkSlices.cache.get(css);
}

/** The file of `slices` that holds code point `cp`, if any. */
function cjkSliceFor(slices, cp) {
  return slices.find((slice) => slice.ranges.some(([lo, hi]) => cp >= lo && cp <= hi));
}

/** Whether Fontsource serves `family` as a Chinese, Japanese or Korean
 *  family (its subsets name the script). Fails when the API does not
 *  answer: a CJK face taken for a Latin one would paint in a system face. */
async function isCjkFamily(family) {
  const meta = await fontsourceMeta(family);
  if (!meta) throw new Error(`api.fontsource.org did not describe ${family}: reload to try again`);
  return !!meta.subsets?.some((subset) => /^(chinese|japanese|korean)/.test(subset));
}

/** faces = { 'Noto Serif TC': ['400', '700'] }, as for loadFonts: the
 *  whole FONTS object may be passed, its other families are left to
 *  loadFonts. Adds one FontFace per file of each CJK face with its
 *  unicodeRange, then loads the files `text` touches. `text` is what the
 *  faces set: the sample for the text face; a book in several voices calls
 *  it once per voice (loadCjkFonts({ 'LXGW WenKai TC': ['400'] }, quotes)),
 *  so the heading and quotation faces fetch and check only their own
 *  characters. Fails when a character of `text` is in no file of a face.
 *  List every weight the pages use: a weight left to buildWithFonts gets
 *  the latin file only. With { vertical: true } it also loads each
 *  family's vertical forms (brackets, quotes, pause marks) for the canvas,
 *  which needs loadVerticalAlternates imported from postext. Resolves to
 *  the number of files loaded. */
async function loadCjkFonts(faces, text, { vertical = false } = {}) {
  kitStatus('Loading fonts…');
  let loaded = 0;
  try {
    if (vertical && typeof loadVerticalAlternates !== 'function') {
      throw new Error('loadCjkFonts(…, { vertical: true }) needs loadVerticalAlternates imported from postext');
    }
    for (const [family, specs] of Object.entries(faces)) {
      if (!(await isCjkFamily(family))) continue;
      const twin = [];
      for (const spec of new Set(specs)) {
        const weight = parseInt(spec, 10);
        const style = spec.endsWith('i') ? 'italic' : 'normal';
        const slices = await cjkSlices(family, weight, style);
        const missing = [...new Set(text)].filter((ch) => /\S/.test(ch) && !cjkSliceFor(slices, ch.codePointAt(0)));
        if (missing.length) {
          throw new Error(`${family} ${spec} has no file for ${missing.slice(0, 12).join(' ')}: `
            + `give each face the text it sets (loadCjkFonts({ '${family}': ['${spec}'] }, text))`);
        }
        for (const slice of slices) {
          document.fonts.add(new FontFace(family, `url(${slice.url}) format('woff2')`,
            { weight: String(weight), style, unicodeRange: slice.range }));
          twin.push({ source: slice.url, weight: String(weight), style, unicodeRange: slice.range });
        }
        const font = `${style === 'italic' ? 'italic ' : ''}${weight} 16px "${family}"`;
        loaded += (await document.fonts.load(font, text)).length;
        if (!document.fonts.check(font, text)) throw new Error(`${family} ${spec} did not load for the sample`);
      }
      // The same files under a twin name with the `vert` feature on: the
      // canvas paints the punctuation of vertical lines with it.
      if (vertical && twin.length) await loadVerticalAlternates(family, twin);
    }
  } catch (error) {
    kitFail(error);
    throw error;
  }
  return loaded;
}

/** The PDF font provider for recipes with CJK faces: a family whose
 *  Fontsource subsets are Chinese, Japanese or Korean gets the files that
 *  hold the characters its pages set (`request.codePoints`); any other
 *  family gets the latin file fontsourceProvider fetches (the "pdf" block)
 *  and, when the face sets letters only latin-ext has, that file too. */
async function cjkPdfProvider(family, weight, style, request) {
  if (!(await isCjkFamily(family))) return cjkLatinPdfFiles(family, weight, style, request);
  const meta = await fontsourceMeta(family);
  const weights = meta.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && !meta.styles.includes('italic') ? 'normal' : style;
  const slices = await cjkSlices(family, w, s);
  const picked = new Set();
  for (const cp of request?.codePoints ?? []) {
    const slice = cjkSliceFor(slices, cp);
    if (slice) picked.add(slice);
  }
  if (!picked.size) picked.add(slices[0]);
  return Promise.all(slices.filter((slice) => picked.has(slice)).map(async (slice) => {
    const res = await fetch(slice.url);
    if (!res.ok) throw new Error(`Fontsource file ${slice.url} (${res.status})`);
    return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
  }));
}

/** A Latin family set next to the CJK faces: its latin file, then its
 *  latin-ext file when the face sets letters only latin-ext has (ō ū in
 *  Hepburn rōmaji, ǎ in pinyin), the file loadFonts adds on screen for
 *  them. Latin comes first: postext-pdf draws a character from the first
 *  file that has it, as the browser takes a character both files hold from
 *  latin. A face Fontsource ships without latin-ext, or whose file does
 *  not come, gets latin alone, and the PDF names the letters it lacks. */
async function cjkLatinPdfFiles(family, weight, style, request) {
  const meta = await fontsourceMeta(family);
  const beyond = [...(request?.codePoints ?? [])].some(cjkLatinExtOnly);
  if (!beyond || !meta?.subsets?.includes('latin-ext')) return fontsourceProvider(family, weight, style);
  const weights = meta.weights?.length ? meta.weights : [400, 700];
  const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
  const s = style === 'italic' && !meta.styles.includes('italic') ? 'normal' : style;
  const id = fontsourceId(family);
  const url = `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-ext-${w}-${s}.woff2`;
  const [latin, ext] = await Promise.all([fontsourceProvider(family, weight, style), fetch(url)
    .then(async (res) => (res.ok ? decompressWoff2(new Uint8Array(await res.arrayBuffer())) : null), () => null)]);
  return ext ? [latin, ext] : latin;
}

/** Whether code point `cp` is in Fontsource's latin-ext file and not in
 *  its latin file: Latin Extended-A and -B, IPA, the spacing modifiers and
 *  Latin Extended Additional (loadFonts's test for latin-ext), less the
 *  few latin holds too (ı Œ œ ʻ ʼ ˆ ˚ ˜). */
function cjkLatinExtOnly(cp) {
  if (!((cp >= 0x100 && cp <= 0x2ff) || (cp >= 0x1e00 && cp <= 0x1eff))) return false;
  return ![0x131, 0x152, 0x153, 0x2bb, 0x2bc, 0x2c6, 0x2da, 0x2dc].includes(cp);
}

/** showPages for a book bound on either edge. A right-bound book (the
 *  document says so: doc.binding is 'right' for page.binding 'right' and
 *  for vertical text) lies on the desk as it opens: page 1 alone on the
 *  left of the spine, then [3 | 2], the spine shade on each page's inner
 *  edge. `binding` ('left' | 'right') overrides the document's. */
function showBook(docs, { binding, ...options } = {}) {
  const count = showPages(docs, options);
  const right = (binding ?? [docs].flat()[0]?.binding) === 'right';
  if (!document.getElementById('pt-kit-cjk')) {
    // The pages keep direction ltr: a canvas draws text in the direction its
    // element inherits, and under rtl each run would end where the engine
    // starts it, its brackets mirrored.
    document.head.insertAdjacentHTML('beforeend', `<style id="pt-kit-cjk">
      .pt-spread[dir="rtl"] canvas { direction: ltr; }
      .pt-spread[dir="rtl"] figure:first-child canvas { box-shadow: inset 14px 0 14px -14px rgb(0 0 0 / .18),
        0 1px 2px rgb(0 0 0 / .5), 0 22px 44px -16px rgb(0 0 0 / .8); }
    </style>`);
  }
  // Each pair stays [verso, recto] in the page; right to left, the verso
  // sits on the right. Phones stack the pages in reading order either way.
  for (const spread of document.querySelectorAll('#pages > .pt-spread')) spread.dir = right ? 'rtl' : 'ltr';
  document.getElementById('pages').dataset.binding = right ? 'right' : 'left';
  return count;
}

// ─── /Kit ───────────────────────────────────────────────────────────────────────
```

## アレンジ

### 行を両端そろえにする

両端そろえにすると、どの行も段の地まで届きます。まず文節の間のスペースが0.5 emまで広がり、次にかなの間が広がります（JLReq §3.8）。20 ptのかなの短い行では間が大きく空くので、このレシピは行を不ぞろいのままにしています。

```diff
-  textAlign: 'left', firstLineIndent: em(0),
+  textAlign: 'justify', firstLineIndent: em(0),
```

## よくあるつまずき

- **日本語のテキストのタグは'ja'。zh-HansやLANGにしない.** レシピの版はenとesですが、日本語のサンプルはどちらの版でも日本語です。`locale: LANG`では英語やスペイン語とタグ付けされ、中国語のタグでは中国語の規則で組まれます（開明式の約物、小書きの仮名が行頭に来てもよい、図の代わりに图、PDFでは中国の字形）。'ja'と書いてください。日本の地域（JLReqの改行と約物、ゴマの圏点、ルビの間隔、図と表の表示名）が選ばれ、ハイフネーションが切られます。リントは、zhやkoのタグで仮名を含むテキストをエラーにします。
- **日本語は日本語の書体で組む.** Noto Serif SCとTCは仮名を持っていますが、漢字は中国の字形（直、骨、角が異なります）で、仮名も中国のデザインで描きます。本文はNoto Serif JPかShippori Mincho B1、見出しはNoto Sans JPで組み、loadCjkFontsで読み込んでください。Fontsourceの日本語ファイルには変体仮名などの古い仮名（U+1B000–1B16F）がないため、loadCjkFontsはそこで失敗し、PDFには四角が印字されます。現代の仮名で書くか、それを持つ書体をレシピのassetsに同梱してください。Shippori Minchoにはマクロン付きの母音ōとūもないので、ローマ字はラテン文字の書体で組んでください。
- **中国語の書体はcjkブロックを通じてスライス単位で読み込む.** Fontsourceは中国語、日本語、韓国語のファミリーを、ウェイトごとに約100個のファイルとして配信し、各ファイルが文字の範囲を受け持ちます。loadFontsが取得するのはlatinファイルだけなので、画面では漢字がシステムの書体で出て計測が狂い、fontsourceProviderはPDFにそのlatinファイルを渡すため、漢字が空の四角で印字されます。キットのcjkブロックを挙げ、loadFontsのあとにloadCjkFonts(FONTS, markdown)を呼び（本で複数のCJK書体を使うときは、それぞれの書体で組むテキストを渡して書体ごとに1回）、renderToPdfにfontProvider: cjkPdfProviderを渡してください。どちらもテキストの文字を含むファイルを取得します。
- **headingsオブジェクトを渡すとH1の改ページが消える.** 既定ではH1は奇数ページへ改ページします（always-odd）。ところがheadingsオブジェクトを渡すと中身にかかわらずこの既定がリセットされ、章は改ページせずに続けて組まれ、span: 'page'も効かなくなります。どの設定でもheadings.levels[0].breakBefore: { enabled: true, parity }を書き直してください。
- **設定はオブジェクトの同一性でキャッシュされる。毎回新しいオブジェクトを作る.** エンジンは解決済みの設定をオブジェクトの同一性でキャッシュします。そのため、設定をその場で書き換えて再ビルドすると前の結果が再利用されます。ビルドのたびに新しいオブジェクトを作ってください。レシピの設定がファクトリー関数config()になっているのはこのためです。
- **レイアウトの前にすべてのフォントを読み込む.** レイアウトはブラウザーが読み込んだフォントで文字を計測し、その幅をキャッシュします。最初のビルドのあとに届いたフォントがあると改行位置が狂い、PDFも画面と一致しなくなります。すべてのウェイトとスタイルを先に読み込み、遅れて届いたときは再ビルドの前にclearMeasurementCache()を呼んでください。

- `keep-all`は、本文にすでにある改行位置を残すだけです。Postextは文節を見つけないので、スペースは書き手が入力します。行より長い文節は、禁則処理が許す最後の位置で途中から折り返されます。
- 中国語は単語の間を空けません。中国語の入門書[注音を右に添えた縦組みの国語読本](https://postext.dev/ja/cookbook/zhuyin-vertical-reader.md)は、代わりに読みを示して幼い読者を助けます。日本語の絵本は漢字を使わないので振り仮名は要らず、文節の間のスペースが読みを助けます。

## クレジット

- レシピ: Ignacio Ferro ([@drnachio](https://github.com/drnachio))
- テキスト: かみの ふね (The Paper Boat), a picture-book story in hiragana written for this recipe: Postext Cookbook, CC-BY-4.0
- 書体: Klee One (OFL-1.1), Zen Maru Gothic (OFL-1.1)
- コード: MIT · サンプルの内容: CC-BY-4.0

## 関連レシピ

- [No. 080 · 注音を右に添えた縦組みの国語読本](https://postext.dev/ja/cookbook/zhuyin-vertical-reader.md): 縦組みの台湾の国語読本。{守株|ㄕㄡˇ|ㄓㄨ}で各字の右に注音の列を置き、絵と注は上段に入れます。 · 難易度 3 (上級) · 教科書
- [No. 076 · すべての漢字に読みを付けたピンインの入門読本](https://postext.dev/ja/cookbook/pinyin-primer.md): 香港の入門読本のモノルビ。{人之初|rén zhī chū}はピンインの音節を1字ずつ中央に載せ、Andikaで28 ptの行間に組みます。 · 難易度 2 (中級) · 教科書, ワークブックと練習問題
- [No. 066 · ヴィネットと梗概で始まる童話の章](https://postext.dev/ja/cookbook/storybook-chapter-vignettes.md): 1つの見出しスタイルがすべての章を開きます。各見出しはヴィネットとイタリックの梗概を属性で指定し、章扉がそれを描きます。 · 難易度 2 (中級) · 小説・戯曲・文芸
