# Uma página de álbum em linha clara, com recordatórios

> Uma página de álbum franco-belga em quatro faixas: quadros de canto vivo, recordatórios amarelos nos cantos e balões em caixa mista, tudo pela config comics.

- Versão HTML: https://postext.dev/pt/cookbook/tebeo-album-page
- Receita Nº 152 · Quadrinhos e mangá · Nível 2 (Intermediário) · Saídas: Canvas, PDF
- Gêneros: Quadrinhos
- Requer postext ≥ 1.21.0, postext-pdf ≥ 1.21.0 · testada com 1.21.0, postext-pdf 1.21.0 em 2026-10-07
- Páginas: [2](https://postext.dev/cookbook/tebeo-album-page/pt/p01.webp?v=3b9cdc27), [3](https://postext.dev/cookbook/tebeo-album-page/pt/p02.webp?v=3b9cdc27)
- PDF: https://postext.dev/cookbook/tebeo-album-page/pt/tebeo-album-page.pdf?v=3b9cdc27
- Abrir no Sandbox: https://postext.dev/pt/sandbox#recipe=tebeo-album-page&lang=pt (.postext: https://postext.dev/cookbook/tebeo-album-page/pt/tebeo-album-page.postext)
- Última atualização: 2026-10-07
- Outros idiomas: [en](https://postext.dev/en/cookbook/tebeo-album-page.md), [es](https://postext.dev/es/cookbook/tebeo-album-page.md), [ca](https://postext.dev/ca/cookbook/tebeo-album-page.md), [zh](https://postext.dev/zh/cookbook/tebeo-album-page.md), [ja](https://postext.dev/ja/cookbook/tebeo-album-page.md), [ar](https://postext.dev/ar/cookbook/tebeo-album-page.md)

## Em poucas palavras

Uma página de um álbum de quadrinhos europeu, com a voz do narrador em caixas amarelas e os diálogos em balões, escrita em texto simples e letreirada pelo Postext em sete línguas.

## O que você vai compor

A primeira história de um álbum de quadrinhos espanhol, *Las naranjas de Carmen* (*As laranjas da Carmen* na edição brasileira): uma folha de rosto na página par e, em frente, uma página de sete quadros em quatro faixas, como se desenham os álbuns franco-belgas. Lola, de nove anos, vai à feira no domingo com o avô Paco e puxa a laranja de baixo da pirâmide de Carmen. Os desenhos são em linha clara com cores chapadas; os quadros têm contorno fino e canto vivo, a narração fica em caixas amarelas encaixadas nos cantos do quadro, e os diálogos são letreirados em maiúsculas e minúsculas, como fazem os letristas europeus. O texto fica no Markdown, um arquivo por língua: o original em espanhol e depois inglês, catalão, chinês, árabe, japonês e português, cada um letreirado pelo motor sobre a mesma divisão e os mesmos desenhos.

**Esta receita responde a:**

- Como faço para compor uma página de álbum europeu com recordatórios de narração?
- Como faço para escrever os balões de fala em Markdown?

## A resposta curta

```js
// script.js, linhas 42–65
const comics = {
  gutter: { horizontal: mm(4.5), vertical: mm(3.5) }, // between tiers, between panels
  panel: { borderWidth: pt(0.75), borderColor: col('ink'), background: col('paper') },
  panelStyles: [{ id: 'open', borderStyle: 'none' }], // the last panel: an epilogue, unframed
  lettering: { fontFamily: LETTER, fontSize: pt(LATIN ? 9 : 8), lineHeight: 1.1,
    color: col('ink'), textTransform: 'none' }, // European letterers write in mixed case
  balloonStyles: [
    { id: 'speech', fill: col('balloon'), stroke: col('ink'), strokeWidth: pt(0.6) },
    // Narration: rectangles butted into a corner of the panel, never with a tail.
    { id: 'caption', fill: col('cartouche'), stroke: col('ink'), strokeWidth: pt(0.6),
      padding: em(0.45), aspect: 3.4 },
    { id: 'shout', fill: col('balloon'), stroke: col('ink'), burstPoints: 16, fontScale: 1.2 },
    { id: 'thought', fill: col('balloon'), stroke: col('ink') },
    { id: 'sfx', fontFamily: DISPLAY, color: col('orange'), halo: pt(1.6), haloColor: col('ink'),
      fontScale: 2.8 },
  ],
  cast: [ // names for the tagged PDF and EPUB, which read the balloons aloud
    { id: 'lola', name: 'Lola' },
    { id: 'paco', name: t({ es: 'el abuelo Paco', en: 'Grandpa Paco', ca: "l'avi Paco",
      zh: '帕科爷爷', ar: 'الجد باكو', ja: 'パコおじいちゃん', pt: 'o vovô Paco' }) },
    { id: 'carmen', name: 'Carmen' },
  ],
  runningHeads: true, // the folio prints on the comic page too
};
```

## Ingredientes

**Ensina**

- [Bordas e sarjetas dos quadros](https://postext.dev/pt/docs/comics.md#quadros-e-arte): comics.panel e os panelStyles nomeados definem a espessura, a cor e o arredondamento da borda e o fundo dos quadros; comics.gutter define o espaço entre as faixas e entre quadros lado a lado.
- [Estilos de balão](https://postext.dev/pt/docs/comics.md#estilos-de-balão): Uma marca depois do personagem escolhe o balão: pensamento (thought), sussurro (whisper), grito (shout), rádio (radio), voz interior (inner), recordatório (caption) ou nota (note); comics.balloonStyles muda a forma, o contorno, o rabicho, o preenchimento e a fonte deles, ou acrescenta outros.

**Também usa**

- [Divisão em quadros](https://postext.dev/pt/docs/comics.md#dividir-a-página)
- [Arte e enquadramento do quadro](https://postext.dev/pt/docs/comics.md#quadros-e-arte)
- [Personagens e âncoras](https://postext.dev/pt/docs/comics.md#personagens-e-âncoras)
- [Páginas de quadrinhos](https://postext.dev/pt/docs/comics.md#páginas-de-quadrinhos)
- [Letreiramento de quadrinhos](https://postext.dev/pt/docs/comics.md#letreiramento)
- [Letreiramento em outros idiomas](https://postext.dev/pt/docs/comics.md#letreiramento)
- [Estilos de título](https://postext.dev/pt/docs/configuration.md#estilos-de-título)
- [Aberturas desenhadas](https://postext.dev/pt/docs/configuration.md#largura-e-design-avançado)
- [Imagens nos designs de página](https://postext.dev/pt/docs/configuration.md#elementos-de-imagem)
- [Paleta de cores semântica](https://postext.dev/pt/docs/configuration.md#paleta-de-cores)
- [Páginas em um canvas](https://postext.dev/pt/docs/configuration.md#renderizar-uma-página-como-bitmap)
- [Exportação para PDF](https://postext.dev/pt/docs/configuration.md#geração-de-pdf)
- [Atributos de título](https://postext.dev/pt/docs/document-format.md#atributos-de-título)
- [Cor do papel](https://postext.dev/pt/docs/configuration.md#página)
- [Cabeços por tipo de página](https://postext.dev/pt/docs/configuration.md#elementos-de-texto)
- [Estilos de parágrafo](https://postext.dev/pt/docs/configuration.md#estilos-de-parágrafo)
- [Fontes incorporadas ao PDF](https://postext.dev/pt/docs/configuration.md#por-que-um-provedor-de-fontes)
- [Figuras e tabelas como recursos](https://postext.dev/pt/docs/document-format.md#recursos)
- [Onomatopeias](https://postext.dev/pt/docs/comics.md#estilos-de-balão)
- [Capítulos sem número](https://postext.dev/pt/docs/configuration.md#estilos-de-título)

**A configuração em resumo**

- [`bodyText`](https://postext.dev/pt/docs/configuration.md#texto-do-corpo), [`colorPalette`](https://postext.dev/pt/docs/configuration.md#paleta-de-cores), [`comics`](https://postext.dev/pt/docs/comics.md#páginas-de-quadrinhos), [`footer`](https://postext.dev/pt/docs/configuration.md#cabeços-e-rodapés), [`header`](https://postext.dev/pt/docs/configuration.md#cabeços-e-rodapés), [`headingStyles`](https://postext.dev/pt/docs/configuration.md#estilos-de-título), [`headings`](https://postext.dev/pt/docs/configuration.md#títulos), [`layout`](https://postext.dev/pt/docs/configuration.md#diagramação), [`locale`](https://postext.dev/pt/docs/configuration.md#hifenização), [`page`](https://postext.dev/pt/docs/configuration.md#página), [`paragraphStyles`](https://postext.dev/pt/docs/configuration.md#estilos-de-parágrafo)

**API**

- [`buildDocument`](https://postext.dev/pt/docs/configuration.md#compilar-um-documento), [`clearMeasurementCache`](https://postext.dev/pt/docs/configuration.md#cache-de-medidas), [`decompressWoff2`](https://postext.dev/pt/docs/configuration.md#provedor-de-fontes-no-navegador-fontsource--woff2), `defaultComicFont`, `defaultComicSfxFont`, [`registerResourceImage`](https://postext.dev/pt/docs/architecture.md#superfície-da-api), [`renderPageToCanvas`](https://postext.dev/pt/docs/configuration.md#renderizar-uma-página-como-bitmap), [`renderToPdf`](https://postext.dev/pt/docs/configuration.md#geração-de-pdf)

**Tipos**

- Patrick Hand (OFL-1.1), Bangers (OFL-1.1), Noto Sans SC (OFL-1.1), ZCOOL KuaiLe (OFL-1.1), Zen Antique (OFL-1.1), Dela Gothic One (OFL-1.1), Playpen Sans Arabic (OFL-1.1), Lalezar (OFL-1.1)

## Preparo

### 1 · O visual do álbum é uma config comics

O código é a [resposta curta](https://postext.dev/pt/cookbook/tebeo-album-page.md#a-resposta-curta) acima. `comics.panel` define todos os quadros (um fio de tinta de 0,75 pt, cantos vivos) e `panelStyles` acrescenta um estilo nomeado sem contorno, que o último quadro usa com `style=open`: um epílogo num banco de praça, fora da feira. Os estilos de balão de fábrica são redefinidos pelo id: `caption` vira uma caixa amarelo-clara com contorno fino, `shout` uma explosão de dezesseis pontas, `sfx` o laranja das laranjas com contorno de tinta. O letreiramento mantém `textTransform: 'none'`; uma página americana usaria `'uppercase'`.

A página em si é uma única diretiva no conteúdo, uma árvore de divisões e sete quadros, cada um com o seu roteiro:

```md
:::page{split="25 [60 | *] / 25 [55 | *] / 24 / * [50 | *]"}
::panel{art=t1}
caption: Los domingos, el abuelo Paco y yo íbamos al mercado.
caption{at=bottom-end}: Siempre a la misma hora. Siempre por la misma puerta.
::panel{art=t4}
lola{thought}: La de abajo es la más gorda.
paco{shout}: ¡Lola, esa no!
```

`caption` é um recordatório de narração (o primeiro vai para o canto superior do lado em que a leitura começa), `{at=bottom-end}` manda o segundo para o canto oposto, e um id de personagem como `lola` ou `paco` desenha um balão com o rabicho apontado para a boca que o desenho declara.

### 2 · Os desenhos sabem onde cada personagem fala

```js
// script.js, linhas 162–294
const box = ([x, y, width, height]) => ({ x, y, width, height });
const who = (id, x, y, head, face) => ({ id, x, y,
  ...(head && { head: { x: head[0], y: head[1] } }), ...(face && { face: box(face) }) });
const ART = {
  t1: { width: 1100, height: 733, safeArea: box([.22, .17, .62, .6]),
    alt: t({ en: 'A sunny Sunday in Madrid: an iron-and-glass market hall on a plaza with shoppers '
        + 'and pigeons.',
      es: 'Un domingo de sol en Madrid: un mercado de hierro y cristal en una plaza, con gente de '
        + 'compras y palomas.',
      ca: 'Un diumenge de sol a Madrid: un mercat de ferro i vidre en una plaça, amb gent '
        + 'comprant i coloms.',
      zh: '马德里一个晴朗的星期天：广场上一座铁架玻璃顶的市场，有买菜的人和鸽子。',
      ar: 'يوم أحد مشمس في مدريد: سوق من الحديد والزجاج في ساحة، فيها متسوّقون وحمام.',
      ja: '晴れた日曜日のマドリード。広場に鉄とガラスの市場が建ち、買い物客とハトがいる。',
      pt: 'Um domingo de sol em Madri: um mercado de ferro e vidro numa praça, com gente fazendo '
        + 'compras e pombos.' }),
  },
  t2: { width: 1000, height: 1000, safeArea: box([.2, .13, .71, .46]),
    alt: t({ en: 'Inside the market, Lola pulls her grandfather Paco by the hand, pointing ahead '
        + 'between the stalls.',
      es: 'Dentro del mercado, Lola tira de la mano de su abuelo Paco y señala adelante, entre '
        + 'los puestos.',
      ca: 'Dins del mercat, la Lola estira el seu avi Paco de la mà i assenyala endavant, entre '
        + 'les parades.',
      zh: '市场里，萝拉拉着爷爷帕科的手，指着摊位之间的前方。',
      ar: 'داخل السوق تشدّ لولا جدّها باكو من يده وتشير إلى الأمام بين الأكشاك.',
      ja: '市場の中、ローラが祖父パコの手を引き、売り場のあいだの先を指さしている。',
      pt: 'Dentro do mercado, Lola puxa o avô Paco pela mão e aponta adiante, entre as '
        + 'bancas.' }),
    anchors: [
      who('paco', .315, .28, [.32, .2], [.22, .13, .17, .19]),
      who('lola', .7, .415, [.66, .33], [.6, .3, .17, .17]),
    ],
    avoid: [box([.82, .4, .1, .06])],
  },
  t3: { width: 1200, height: 800, safeArea: box([.13, .12, .79, .58]),
    alt: t({ en: 'Lola gazes up at a towering pyramid of oranges while Carmen, the fruit seller, '
        + 'polishes an orange.',
      es: 'Lola mira hacia arriba una pirámide altísima de naranjas mientras Carmen, la frutera, '
        + 'saca brillo a una naranja.',
      ca: 'La Lola mira amunt una piràmide altíssima de taronges mentre la Carmen, la fruitera, '
        + 'fa brillar una taronja.',
      zh: '萝拉仰头望着一座高高的橙子金字塔，水果摊主卡门正在擦亮一个橙子。',
      ar: 'لولا تنظر إلى هرم عالٍ من البرتقال، بينما كارمن بائعة الفاكهة تلمّع برتقالة.',
      ja: 'ローラがそびえるオレンジのピラミッドを見上げ、果物屋のカルメンはオレンジをみがいている。',
      pt: 'Lola olha para cima, para uma pirâmide altíssima de laranjas, enquanto Carmen, a '
        + 'feirante, lustra uma laranja.' }),
    anchors: [
      who('lola', .235, .43, [.19, .36], [.14, .3, .13, .18]),
      who('carmen', .795, .27, [.8, .19], [.74, .12, .13, .19]),
    ],
    avoid: [box([.4, .2, .2, .15])],
  },
  t4: { width: 1152, height: 1152, safeArea: box([.08, .08, .76, .65]),
    alt: t({ en: 'Lola reaches for an orange at the bottom of the pile; Paco, alarmed, raises a '
        + 'hand to stop her.',
      es: 'Lola alarga la mano hacia una naranja de la base del montón; Paco, alarmado, levanta '
        + 'la mano para detenerla.',
      ca: 'La Lola allarga la mà cap a una taronja de la base de la pila; en Paco, alarmat, '
        + 'aixeca la mà per aturar-la.',
      zh: '萝拉伸手去拿最底下的一个橙子；帕科吓了一跳，举手想拦住她。',
      ar: 'لولا تمدّ يدها إلى برتقالة في أسفل الكومة، وباكو مذعورًا يرفع يده ليوقفها.',
      ja: 'ローラが山のいちばん下のオレンジに手をのばし、あわてたパコが止めようと手を上げる。',
      pt: 'Lola estica a mão para uma laranja da base da pilha; Paco, assustado, levanta a mão '
        + 'para impedi-la.' }),
    anchors: [
      who('paco', .31, .3, [.28, .17], [.17, .1, .2, .26]),
      who('lola', .635, .485, [.61, .38], [.48, .28, .27, .27]),
    ],
    // Lola's reaching arm and her hand on the orange: the thought balloon keeps off them.
    avoid: [box([.62, .58, .17, .22]), box([.7, .78, .15, .1]), box([.1, .36, .15, .19])],
  },
  t5: { width: 1100, height: 733, safeArea: box([.06, .16, .9, .41]),
    alt: t({ en: "The orange pyramid collapses: oranges roll everywhere, Paco's beret flies off, "
        + "Carmen throws up her hands, pigeons scatter.",
      es: 'La pirámide se derrumba: las naranjas ruedan por todas partes, la boina de Paco sale '
        + 'volando, Carmen levanta los brazos y las palomas huyen.',
      ca: 'La piràmide s’enfonsa: les taronges rodolen per tot arreu, la boina d’en Paco surt '
        + 'volant, la Carmen aixeca els braços i els coloms fugen.',
      zh: '橙子金字塔塌了：橙子滚得到处都是，帕科的贝雷帽飞了出去，卡门举起双手，鸽子四散飞走。',
      ar: 'ينهار هرم البرتقال: البرتقال يتدحرج في كل مكان، وقبعة باكو تطير، وكارمن ترفع يديها، '
        + 'والحمام يتفرّق.',
      ja: 'オレンジのピラミッドがくずれる。オレンジが転がり、パコのベレー帽が飛び、カルメンが両手を上げ、ハトが散る。',
      pt: 'A pirâmide de laranjas desaba: laranjas rolam por toda parte, a boina de Paco sai '
        + 'voando, Carmen ergue os braços e os pombos fogem.' }),
    anchors: [
      who('lola', .15, .44, [.14, .37], [.08, .32, .12, .15]),
      who('paco', .34, .31, [.33, .27], [.27, .22, .12, .14]),
      who('carmen', .81, .37, [.8, .3], [.74, .22, .13, .18]),
      who('sfx', .55, .45),
    ],
    avoid: [box([.24, .12, .09, .1])],
  },
  t6: { width: 1200, height: 800, safeArea: box([.15, .1, .68, .58]),
    alt: t({ en: 'Lola, Paco and Carmen kneel to gather the oranges into the beret and the apron, '
        + 'laughing; a pigeon pecks one.',
      es: 'Lola, Paco y Carmen, de rodillas, recogen las naranjas en la boina y el delantal entre '
        + 'risas; una paloma picotea una.',
      ca: 'La Lola, en Paco i la Carmen, de genolls, recullen les taronges a la boina i al '
        + 'davantal entre rialles; un colom en picoteja una.',
      zh: '萝拉、帕科和卡门跪在地上，笑着把橙子捡进贝雷帽和围裙里；一只鸽子在啄一个橙子。',
      ar: 'لولا وباكو وكارمن جاثون يجمعون البرتقال في القبعة والمريلة وهم يضحكون، وحمامة تنقر '
        + 'واحدة.',
      ja: 'ローラとパコとカルメンがひざをつき、笑いながらオレンジをベレー帽とエプロンに集める。ハトが一つつついている。',
      pt: 'Lola, Paco e Carmen, de joelhos, juntam as laranjas na boina e no avental, rindo; um '
        + 'pombo bica uma delas.' }),
    anchors: [
      who('lola', .245, .42, [.24, .33], [.17, .27, .14, .2]),
      who('paco', .49, .3, [.48, .22], [.42, .14, .14, .2]),
      who('carmen', .73, .28, [.73, .2], [.67, .12, .13, .19]),
    ],
    avoid: [box([.74, .75, .14, .2])],
  },
  t7: { width: 1300, height: 867, safeArea: box([.19, .17, .56, .58]),
    alt: t({ en: "On a park bench, Lola and Paco peel oranges and laugh; a pigeon sits on Paco's "
        + "beret.",
      es: 'En un banco del parque, Lola y Paco pelan naranjas y se ríen; una paloma se ha posado '
        + 'en la boina de Paco.',
      ca: 'En un banc del parc, la Lola i en Paco pelen taronges i riuen; un colom s’ha posat a '
        + 'la boina d’en Paco.',
      zh: '公园长椅上，萝拉和帕科剥着橙子笑着；一只鸽子停在帕科的贝雷帽上。',
      ar: 'على مقعد في الحديقة يقشّر لولا وباكو البرتقال ويضحكان، وحمامة تقف على قبعة باكو.',
      ja: '公園のベンチでローラとパコがオレンジをむいて笑っている。パコのベレー帽にハトがとまっている。',
      pt: 'Num banco de praça, Lola e Paco descascam laranjas e riem; um pombo pousou na boina '
        + 'de Paco.' }),
    anchors: [
      who('lola', .32, .45, [.31, .35], [.24, .3, .15, .22]),
      who('paco', .6, .38, [.65, .25], [.54, .2, .19, .24]),
    ],
    avoid: [box([.6, .01, .13, .15])],
  },

};
```

Cada desenho declara o que todo recorte precisa manter (`safeArea`), onde ficam a boca, a cabeça e o rosto de cada personagem (`anchors`) e o que nenhum balão pode cobrir (`avoid`), tudo em frações do desenho. O quadro do desmoronamento ocupa a terceira faixa, 200 mm por 63 mm, então a zona segura dele é a faixa dos rostos e das laranjas voando; os quadros quadrados perdem o chão. Nada disso depende da língua, por isso as sete edições compartilham tudo.

### 3 · Uma folha de rosto diante da história

```js
// script.js, linhas 69–85
const centred = (id, y) => ({ anchor: { to: id, edge: 'below' }, offset: { y: mm(y) },
  size: { width: 'fill', height: 'auto' } }); // full width, so align: 'center' centres it
const titlePage = {
  id: 'title-page', numbered: false, toc: false, breakBefore: { enabled: true, parity: 'any' },
  advancedDesign: { enabled: true, minHeight: mm(212), slot: { elements: [
    { kind: 'text', id: 'series', content: '{attr.series}', fontFamily: LETTER, fontSize: pt(17),
      color: col('ink'), align: 'center', overflow: 'wrap',
      placement: { anchor: { to: 'container', edge: 'top-left' }, offset: { y: mm(24) },
        size: { width: 'fill', height: 'auto' } } },
    { kind: 'text', id: 'title', content: '{titleText}', fontFamily: DISPLAY, fontSize: pt(58),
      lineHeight: 1.05, color: col('orange'), align: 'center', overflow: 'wrap',
      placement: centred('#series', 5) },
    { kind: 'image', id: 'vignette', resourceId: 't3', decorative: true, // 3 : 2, uncropped
      placement: { anchor: { to: '#title', edge: 'below' }, offset: { x: mm(10), y: mm(14) },
        size: { width: mm(180), height: mm(120) } } },
  ] } },
};
```

A folha de rosto é um estilo de título: a linha da série na letra do letreiramento, o título na letra das onomatopeias (Bangers, ou Dela Gothic One, ZCOOL KuaiLe e Lalezar nas outras escritas) e uma vinheta da banca de Carmen na sua proporção de 3 : 2. A montagem passa `continuation: { pageIndexOffset: 1 }`, de modo que a folha de rosto cai numa página par e a história abre na ímpar em frente, a página 3.

## A receita completa

Um único arquivo, composto a partir da pasta da receita com o texto de exemplo e o kit comum das Receitas já incluídos; ele monta a própria página. Para executá-lo, coloque-o em um `<script type="module">` de uma página vazia ou cole-o no painel JS de um pen novo do CodePen (como módulo). Ele importa o postext do esm.sh, então não há nada para instalar nem compilar.

- Pasta da receita: https://github.com/drnachio/postext/tree/main/cookbook/tebeo-album-page

### script.js

```js
// ═══ Postext Cookbook · Nº 152 · An album page in clear line, with narration captions ═══
// https://postext.dev/en/cookbook/tebeo-album-page
// Code: MIT · Story: written for the recipe (CC BY 4.0) · Pictures: generated with diffusion models
// Fonts: Patrick Hand, Bangers, the comic faces of each script (OFL) · Needs postext ≥ 1.21.0
// A Spanish album page in the Franco-Belgian way: four tiers, yellow narration boxes, and
// balloons lettered in upper and lower case. Every edition re-letters the same split and art.
import {
  buildDocument, renderPageToCanvas, clearMeasurementCache, registerResourceImage,
  defaultComicFont, defaultComicSfxFont,
} from 'https://esm.sh/postext';
import { renderToPdf, decompressWoff2 } from 'https://esm.sh/postext-pdf';

const LANG = 'pt'; // @lang: the album's language: 'es' | 'en' | 'ca' | 'zh' | 'ar' | 'ja' | 'pt'
const RECIPE = 'tebeo-album-page';

// ─── 1 · Design ─────────────────────────────────────────────────────────────
// #region palette: flat clear-line colours: ink, the oranges, the yellow of the cartouches
const palette = {
  ink: '#1d1b19', // outlines, lettering
  orange: '#d9601a', // the title and the sound effect (3.6:1 on paper, display sizes only)
  cartouche: '#fbe8a6', // narration boxes
  balloon: '#ffffff',
  muted: '#5f5a54', // credits
  paper: '#fffdf8',
};
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: 'orange (defaults)', value: { hex: palette.orange, model: 'hex' } },
];
// #endregion

const LOCALE = t({ es: 'es', en: 'en-gb', ca: 'ca', zh: 'zh-Hans', ar: 'ar', ja: 'ja',
  pt: 'pt-BR' });
// A hand that letters in upper and lower case for the Latin editions; the engine's comic
// faces for Chinese, Japanese and Arabic, which a Latin hand cannot set.
const LATIN = ['es', 'en', 'ca', 'pt'].includes(LANG);
const LETTER = LATIN ? 'Patrick Hand' : defaultComicFont(LOCALE);
const DISPLAY = defaultComicSfxFont(LOCALE); // Bangers, Dela Gothic One, ZCOOL KuaiLe, Lalezar

// #region answer: the album's look: thin square frames, yellow cartouches, mixed-case lettering
const comics = {
  gutter: { horizontal: mm(4.5), vertical: mm(3.5) }, // between tiers, between panels
  panel: { borderWidth: pt(0.75), borderColor: col('ink'), background: col('paper') },
  panelStyles: [{ id: 'open', borderStyle: 'none' }], // the last panel: an epilogue, unframed
  lettering: { fontFamily: LETTER, fontSize: pt(LATIN ? 9 : 8), lineHeight: 1.1,
    color: col('ink'), textTransform: 'none' }, // European letterers write in mixed case
  balloonStyles: [
    { id: 'speech', fill: col('balloon'), stroke: col('ink'), strokeWidth: pt(0.6) },
    // Narration: rectangles butted into a corner of the panel, never with a tail.
    { id: 'caption', fill: col('cartouche'), stroke: col('ink'), strokeWidth: pt(0.6),
      padding: em(0.45), aspect: 3.4 },
    { id: 'shout', fill: col('balloon'), stroke: col('ink'), burstPoints: 16, fontScale: 1.2 },
    { id: 'thought', fill: col('balloon'), stroke: col('ink') },
    { id: 'sfx', fontFamily: DISPLAY, color: col('orange'), halo: pt(1.6), haloColor: col('ink'),
      fontScale: 2.8 },
  ],
  cast: [ // names for the tagged PDF and EPUB, which read the balloons aloud
    { id: 'lola', name: 'Lola' },
    { id: 'paco', name: t({ es: 'el abuelo Paco', en: 'Grandpa Paco', ca: "l'avi Paco",
      zh: '帕科爷爷', ar: 'الجد باكو', ja: 'パコおじいちゃん', pt: 'o vovô Paco' }) },
    { id: 'carmen', name: 'Carmen' },
  ],
  runningHeads: true, // the folio prints on the comic page too
};
// #endregion

// #region title-page: the page facing the story: series, title in the sound-effect face, vignette
const centred = (id, y) => ({ anchor: { to: id, edge: 'below' }, offset: { y: mm(y) },
  size: { width: 'fill', height: 'auto' } }); // full width, so align: 'center' centres it
const titlePage = {
  id: 'title-page', numbered: false, toc: false, breakBefore: { enabled: true, parity: 'any' },
  advancedDesign: { enabled: true, minHeight: mm(212), slot: { elements: [
    { kind: 'text', id: 'series', content: '{attr.series}', fontFamily: LETTER, fontSize: pt(17),
      color: col('ink'), align: 'center', overflow: 'wrap',
      placement: { anchor: { to: 'container', edge: 'top-left' }, offset: { y: mm(24) },
        size: { width: 'fill', height: 'auto' } } },
    { kind: 'text', id: 'title', content: '{titleText}', fontFamily: DISPLAY, fontSize: pt(58),
      lineHeight: 1.05, color: col('orange'), align: 'center', overflow: 'wrap',
      placement: centred('#series', 5) },
    { kind: 'image', id: 'vignette', resourceId: 't3', decorative: true, // 3 : 2, uncropped
      placement: { anchor: { to: '#title', edge: 'below' }, offset: { x: mm(10), y: mm(14) },
        size: { width: mm(180), height: mm(120) } } },
  ] } },
};
// #endregion

const config = () => ({ // a factory: the engine caches resolved configs per object
  locale: LOCALE,
  colorPalette,
  page: {
    sizePreset: 'custom', width: mm(230), height: mm(300), dpi: 150, // a hardback album
    backgroundColor: col('paper'),
    margins: { top: mm(18), bottom: mm(22), left: mm(16), right: mm(14), mirror: true },
  },
  layout: { layoutType: 'single' },
  bodyText: {
    fontFamily: LETTER, fontSize: pt(11), lineHeight: pt(15), color: col('ink'),
    boldColor: col('ink'), italicColor: col('ink'), referenceColor: col('ink'),
    textAlign: 'center', firstLineIndent: mm(0), hyphenation: { enabled: false },
  },
  headings: { fontFamily: DISPLAY, color: col('orange'),
    levels: [{ level: 1, breakBefore: { enabled: true, parity: 'any' } }] }, // the H1 break
  headingStyles: [titlePage],
  paragraphStyles: [
    { id: 'credits', fontFamily: LETTER, fontSize: pt(9.5), lineHeight: pt(13),
      color: col('muted'), textAlign: 'center', marginTop: pt(6) },
  ],
  comics,
  header: { elements: [] },
  footer: { elements: [{ kind: 'text', id: 'folio', content: '{pageNumber}', fontFamily: LETTER,
    fontSize: pt(10), color: col('ink'), align: 'center', pages: 'comic', // not on the title
    placement: { anchor: { to: 'page', edge: 'bottom' }, offset: { y: mm(-10) } } }] },
});

// ─── 2 · Content ────────────────────────────────────────────────────────────
const markdown = String.raw`# As laranjas da Carmen {style="title-page" series="Uma história da Lola e do vovô Paco"}

:::paragraphs{style="credits"}
Roteiro e letreiramento: Receitas do Postext · Arte: gerada com modelos de difusão

Letreirado em Patrick Hand e Bangers (SIL OFL 1.1) · História: CC BY 4.0
:::

:::page{split="25 [60 | *] / 25 [55 | *] / 24 / * [50 | *]"}
::panel{art=t1}
caption: Aos domingos, o vovô Paco e eu íamos ao mercado.
caption{at=bottom-end}: Sempre no mesmo horário. Sempre pela mesma porta.
::panel{art=t2}
lola: Corre, vovô, que vai acabar!
paco: As laranjas não vão fugir, Lola.
caption{at=bottom-start}: O vovô foi padeiro por quarenta anos. Andava devagar por hábito.
::panel{art=t3}
caption: A Carmen tinha a pirâmide de laranjas mais bonita de Madri.
carmen: Olha só que laranjas, querida! De Valência, chegaram hoje cedo.
::panel{art=t4}
lola{thought}: A de baixo é a maior.
paco{shout}: Lola, essa não!
::panel{art=t5}
caption: Tarde demais.
sfx{at="55% 45%" rotate=-6}: CATAPUM!
carmen{shout}: Ai, minha pirâmide!
::panel{art=t6}
lola: Desculpa, Carmen!
carmen: Vamos lá, com nós três isso é rapidinho.
paco: Essa boina nunca carregou nada tão bom.
::panel{art=t7 style=open}
caption: A Carmen nos deu uma sacola inteira. Disse que eram “as do chão”.
paco: As melhores, Lola. As que a gente merece.
:::
`; // content.<lang>.md: the title page, then the :::page

// ─── 3 · Fonts ──────────────────────────────────────────────────────────────
const FONTS = {
  'Patrick Hand': ['400'], Bangers: ['400'], // Latin editions
  'Noto Sans SC': ['400', '700'], 'ZCOOL KuaiLe': ['400'], // Chinese
  'Zen Antique': ['400'], 'Dela Gothic One': ['400'], // Japanese
  'Playpen Sans Arabic': ['400', '700'], Lalezar: ['400'], // Arabic
};

// #region art: the panel manifest: safe areas, speakers' mouths, heads and faces, in fractions
const box = ([x, y, width, height]) => ({ x, y, width, height });
const who = (id, x, y, head, face) => ({ id, x, y,
  ...(head && { head: { x: head[0], y: head[1] } }), ...(face && { face: box(face) }) });
const ART = {
  t1: { width: 1100, height: 733, safeArea: box([.22, .17, .62, .6]),
    alt: t({ en: 'A sunny Sunday in Madrid: an iron-and-glass market hall on a plaza with shoppers '
        + 'and pigeons.',
      es: 'Un domingo de sol en Madrid: un mercado de hierro y cristal en una plaza, con gente de '
        + 'compras y palomas.',
      ca: 'Un diumenge de sol a Madrid: un mercat de ferro i vidre en una plaça, amb gent '
        + 'comprant i coloms.',
      zh: '马德里一个晴朗的星期天：广场上一座铁架玻璃顶的市场，有买菜的人和鸽子。',
      ar: 'يوم أحد مشمس في مدريد: سوق من الحديد والزجاج في ساحة، فيها متسوّقون وحمام.',
      ja: '晴れた日曜日のマドリード。広場に鉄とガラスの市場が建ち、買い物客とハトがいる。',
      pt: 'Um domingo de sol em Madri: um mercado de ferro e vidro numa praça, com gente fazendo '
        + 'compras e pombos.' }),
  },
  t2: { width: 1000, height: 1000, safeArea: box([.2, .13, .71, .46]),
    alt: t({ en: 'Inside the market, Lola pulls her grandfather Paco by the hand, pointing ahead '
        + 'between the stalls.',
      es: 'Dentro del mercado, Lola tira de la mano de su abuelo Paco y señala adelante, entre '
        + 'los puestos.',
      ca: 'Dins del mercat, la Lola estira el seu avi Paco de la mà i assenyala endavant, entre '
        + 'les parades.',
      zh: '市场里，萝拉拉着爷爷帕科的手，指着摊位之间的前方。',
      ar: 'داخل السوق تشدّ لولا جدّها باكو من يده وتشير إلى الأمام بين الأكشاك.',
      ja: '市場の中、ローラが祖父パコの手を引き、売り場のあいだの先を指さしている。',
      pt: 'Dentro do mercado, Lola puxa o avô Paco pela mão e aponta adiante, entre as '
        + 'bancas.' }),
    anchors: [
      who('paco', .315, .28, [.32, .2], [.22, .13, .17, .19]),
      who('lola', .7, .415, [.66, .33], [.6, .3, .17, .17]),
    ],
    avoid: [box([.82, .4, .1, .06])],
  },
  t3: { width: 1200, height: 800, safeArea: box([.13, .12, .79, .58]),
    alt: t({ en: 'Lola gazes up at a towering pyramid of oranges while Carmen, the fruit seller, '
        + 'polishes an orange.',
      es: 'Lola mira hacia arriba una pirámide altísima de naranjas mientras Carmen, la frutera, '
        + 'saca brillo a una naranja.',
      ca: 'La Lola mira amunt una piràmide altíssima de taronges mentre la Carmen, la fruitera, '
        + 'fa brillar una taronja.',
      zh: '萝拉仰头望着一座高高的橙子金字塔，水果摊主卡门正在擦亮一个橙子。',
      ar: 'لولا تنظر إلى هرم عالٍ من البرتقال، بينما كارمن بائعة الفاكهة تلمّع برتقالة.',
      ja: 'ローラがそびえるオレンジのピラミッドを見上げ、果物屋のカルメンはオレンジをみがいている。',
      pt: 'Lola olha para cima, para uma pirâmide altíssima de laranjas, enquanto Carmen, a '
        + 'feirante, lustra uma laranja.' }),
    anchors: [
      who('lola', .235, .43, [.19, .36], [.14, .3, .13, .18]),
      who('carmen', .795, .27, [.8, .19], [.74, .12, .13, .19]),
    ],
    avoid: [box([.4, .2, .2, .15])],
  },
  t4: { width: 1152, height: 1152, safeArea: box([.08, .08, .76, .65]),
    alt: t({ en: 'Lola reaches for an orange at the bottom of the pile; Paco, alarmed, raises a '
        + 'hand to stop her.',
      es: 'Lola alarga la mano hacia una naranja de la base del montón; Paco, alarmado, levanta '
        + 'la mano para detenerla.',
      ca: 'La Lola allarga la mà cap a una taronja de la base de la pila; en Paco, alarmat, '
        + 'aixeca la mà per aturar-la.',
      zh: '萝拉伸手去拿最底下的一个橙子；帕科吓了一跳，举手想拦住她。',
      ar: 'لولا تمدّ يدها إلى برتقالة في أسفل الكومة، وباكو مذعورًا يرفع يده ليوقفها.',
      ja: 'ローラが山のいちばん下のオレンジに手をのばし、あわてたパコが止めようと手を上げる。',
      pt: 'Lola estica a mão para uma laranja da base da pilha; Paco, assustado, levanta a mão '
        + 'para impedi-la.' }),
    anchors: [
      who('paco', .31, .3, [.28, .17], [.17, .1, .2, .26]),
      who('lola', .635, .485, [.61, .38], [.48, .28, .27, .27]),
    ],
    // Lola's reaching arm and her hand on the orange: the thought balloon keeps off them.
    avoid: [box([.62, .58, .17, .22]), box([.7, .78, .15, .1]), box([.1, .36, .15, .19])],
  },
  t5: { width: 1100, height: 733, safeArea: box([.06, .16, .9, .41]),
    alt: t({ en: "The orange pyramid collapses: oranges roll everywhere, Paco's beret flies off, "
        + "Carmen throws up her hands, pigeons scatter.",
      es: 'La pirámide se derrumba: las naranjas ruedan por todas partes, la boina de Paco sale '
        + 'volando, Carmen levanta los brazos y las palomas huyen.',
      ca: 'La piràmide s’enfonsa: les taronges rodolen per tot arreu, la boina d’en Paco surt '
        + 'volant, la Carmen aixeca els braços i els coloms fugen.',
      zh: '橙子金字塔塌了：橙子滚得到处都是，帕科的贝雷帽飞了出去，卡门举起双手，鸽子四散飞走。',
      ar: 'ينهار هرم البرتقال: البرتقال يتدحرج في كل مكان، وقبعة باكو تطير، وكارمن ترفع يديها، '
        + 'والحمام يتفرّق.',
      ja: 'オレンジのピラミッドがくずれる。オレンジが転がり、パコのベレー帽が飛び、カルメンが両手を上げ、ハトが散る。',
      pt: 'A pirâmide de laranjas desaba: laranjas rolam por toda parte, a boina de Paco sai '
        + 'voando, Carmen ergue os braços e os pombos fogem.' }),
    anchors: [
      who('lola', .15, .44, [.14, .37], [.08, .32, .12, .15]),
      who('paco', .34, .31, [.33, .27], [.27, .22, .12, .14]),
      who('carmen', .81, .37, [.8, .3], [.74, .22, .13, .18]),
      who('sfx', .55, .45),
    ],
    avoid: [box([.24, .12, .09, .1])],
  },
  t6: { width: 1200, height: 800, safeArea: box([.15, .1, .68, .58]),
    alt: t({ en: 'Lola, Paco and Carmen kneel to gather the oranges into the beret and the apron, '
        + 'laughing; a pigeon pecks one.',
      es: 'Lola, Paco y Carmen, de rodillas, recogen las naranjas en la boina y el delantal entre '
        + 'risas; una paloma picotea una.',
      ca: 'La Lola, en Paco i la Carmen, de genolls, recullen les taronges a la boina i al '
        + 'davantal entre rialles; un colom en picoteja una.',
      zh: '萝拉、帕科和卡门跪在地上，笑着把橙子捡进贝雷帽和围裙里；一只鸽子在啄一个橙子。',
      ar: 'لولا وباكو وكارمن جاثون يجمعون البرتقال في القبعة والمريلة وهم يضحكون، وحمامة تنقر '
        + 'واحدة.',
      ja: 'ローラとパコとカルメンがひざをつき、笑いながらオレンジをベレー帽とエプロンに集める。ハトが一つつついている。',
      pt: 'Lola, Paco e Carmen, de joelhos, juntam as laranjas na boina e no avental, rindo; um '
        + 'pombo bica uma delas.' }),
    anchors: [
      who('lola', .245, .42, [.24, .33], [.17, .27, .14, .2]),
      who('paco', .49, .3, [.48, .22], [.42, .14, .14, .2]),
      who('carmen', .73, .28, [.73, .2], [.67, .12, .13, .19]),
    ],
    avoid: [box([.74, .75, .14, .2])],
  },
  t7: { width: 1300, height: 867, safeArea: box([.19, .17, .56, .58]),
    alt: t({ en: "On a park bench, Lola and Paco peel oranges and laugh; a pigeon sits on Paco's "
        + "beret.",
      es: 'En un banco del parque, Lola y Paco pelan naranjas y se ríen; una paloma se ha posado '
        + 'en la boina de Paco.',
      ca: 'En un banc del parc, la Lola i en Paco pelen taronges i riuen; un colom s’ha posat a '
        + 'la boina d’en Paco.',
      zh: '公园长椅上，萝拉和帕科剥着橙子笑着；一只鸽子停在帕科的贝雷帽上。',
      ar: 'على مقعد في الحديقة يقشّر لولا وباكو البرتقال ويضحكان، وحمامة تقف على قبعة باكو.',
      ja: '公園のベンチでローラとパコがオレンジをむいて笑っている。パコのベレー帽にハトがとまっている。',
      pt: 'Num banco de praça, Lola e Paco descascam laranjas e riem; um pombo pousou na boina '
        + 'de Paco.' }),
    anchors: [
      who('lola', .32, .45, [.31, .35], [.24, .3, .15, .22]),
      who('paco', .6, .38, [.65, .25], [.54, .2, .19, .24]),
    ],
    avoid: [box([.6, .01, .13, .15])],
  },

};
// #endregion

// ─── 4 · Build & show ───────────────────────────────────────────────────────
const faces = { [LETTER]: FONTS[LETTER], [DISPLAY]: FONTS[DISPLAY] }; // this edition's two faces
await loadFonts(FONTS, markdown); // the Latin files of every face; then each script's own
await loadCjkFonts(faces, markdown);
await loadArabicFonts(faces, markdown);
await loadComicFonts(faces, markdown);
const resources = await Promise.all([
  comicPanel('t1', asset('t1.jpg'), ART.t1), comicPanel('t2', asset('t2.jpg'), ART.t2),
  comicPanel('t3', asset('t3.jpg'), ART.t3), comicPanel('t4', asset('t4.jpg'), ART.t4),
  comicPanel('t5', asset('t5.jpg'), ART.t5), comicPanel('t6', asset('t6.jpg'), ART.t6),
  comicPanel('t7', asset('t7.jpg'), ART.t7),
]);
// pageIndexOffset 1: the title page is a verso, so it faces the story's first page.
const continuation = { pageIndexOffset: 1, pageNumbering: { startAt: 2 } };
const doc = await buildWithFonts(
  () => buildDocument({ markdown, resources, continuation }, config()), markdown);
showBook(doc, { title: t({ es: 'Una página de álbum', en: 'An album page', ca: "Una pàgina d'àlbum",
  zh: '一页欧式漫画', ar: 'صفحة من ألبوم مصوّر', ja: 'BDのアルバムの一ページ',
  pt: 'Uma página de álbum' }) });
offerPdf(() => renderToPdf(doc, { fontProvider: comicPdfProvider, 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 v2 ── the same in every recipe · postext.dev/cookbook
// Postext measures with the loaded faces and caches the widths: load every face
// before the first build, from Fontsource, the files the PDF embeds too.

/** faces = { 'Family Name': ['400', '400i', '700'] }. `text` is the sample:
 *  č ł † α χ also load latin-ext and greek files (kitSubsetsFor). 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',
    greek: 'U+0370-03FF',
  };
  const jobs = [];
  let added = 0;
  for (const [family, specs] of Object.entries(faces)) {
    const id = fontsourceId(family);
    const todo = [...new Set(specs)].map((spec) => [parseInt(spec, 10), spec.endsWith('i') ? 'italic' : 'normal'])
      .filter(([weight, style]) => !hasFace(family, weight, style)); // before any await
    const meta = optional || /[^\0-ÿ]/u.test(text) ? await fontsourceMeta(family) : null;
    const subsets = ['latin', ...kitSubsetsFor(text, meta)];
    for (const [weight, style] of todo) {
      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` and loads any face the pages use that FONTS missed (a regular
 *  one with a warning), then clears the measurement cache and builds 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. */
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' };
}

/** A loaded FontFace covers this family, weight and style (fonts.check() would
 *  also say yes 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;
}

/** The files beyond latin `text` needs that `meta`'s family ships. */
function kitSubsetsFor(text, meta) {
  return [[/[Ā-˿ᴀ-ᶿḀ-ỿ†ℓⱠ-Ɀ꜠-ꟿ]/u, 'latin-ext'], [/[Ͱ-Ͽ]/u, 'greek']]
    .filter(([re, x]) => re.test(text) && meta?.subsets?.includes(x)).map(([, x]) => x);
}

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

/** The family's Fontsource metadata (weights, styles, subsets), 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
/** The pages as spreads on a dark desk, page 1 alone, then verso | recto,
 *  each painted when it scrolls near. */
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 v2 ── the same in every recipe that exports a PDF
/** The Fontsource files the screen used, as TrueType: the nearest weight the
 *  family ships, upright if it has no italic; latin, then what the face's
 *  letters need (kitSubsetsFor). */
async function fontsourceProvider(family, weight, style, request) {
  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 text = String.fromCodePoint(...(request?.codePoints ?? []));
  const more = kitSubsetsFor(text, meta);
  const files = await Promise.all(['latin', ...more].map(async (subset) => {
    const res = await fetch(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-${subset}-${w}-${s}.woff2`);
    if (!res.ok) throw new Error(`Fontsource has no ${family} ${w} ${s} ${subset}`);
    return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
  }));
  return files.length === 1 ? files[0] : files;
}

/** A "Build the PDF" button; then "Open the PDF" (a new tab: CodePen's frame
 *  shows no 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 · arabic v1 ── Arabic-script faces · postext.dev/cookbook
// Fontsource ships an Arabic family as one file per subset and weight: the
// `arabic` file holds the letters, the harakat, the Arabic-Indic digits, the
// Arabic punctuation and the presentation forms; `latin` and `latin-ext`
// hold the rest. loadFonts loads the latin files; this block adds the arabic
// file of every Arabic family, for the canvas and for the PDF, which shapes
// the letters with HarfBuzz from the same bytes.

/** The code points of Fontsource's `arabic` subset, as its stylesheets
 *  declare them (the same unicode-range the browser picks the file by). A
 *  function, not a const: the kit is inlined after the recipe's top-level
 *  awaits, and a const read before its line throws, where a function
 *  declaration is hoisted. */
function arabicRange() {
  return 'U+0600-06FF,U+0750-077F,U+0870-088E,U+0890-0891,U+0897-08E1,U+08E3-08FF,'
    + 'U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC,U+102E0-102FB,'
    + 'U+10E60-10E7E,U+10EC2-10EC4,U+10EFC-10EFF,U+1EE00-1EEFF';
}

/** Whether code point `cp` is in the arabic file. */
function inArabicRange(cp) {
  inArabicRange.ranges ??= arabicRange().split(',').map((part) => {
    const [lo, hi = lo] = part.slice(2).split('-');
    return [parseInt(lo, 16), parseInt(hi, 16)];
  });
  return inArabicRange.ranges.some(([lo, hi]) => cp >= lo && cp <= hi);
}

/** Whether Fontsource serves `family` with an `arabic` subset. Fails when
 *  the API does not answer: an Arabic face taken for a Latin one would set
 *  its letters in a system face. */
async function isArabicFamily(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?.includes('arabic');
}

/** The arabic file of a face. */
function arabicFileUrl(family, weight, style) {
  const id = fontsourceId(family);
  return `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-arabic-${weight}-${style}.woff2`;
}

/** faces = { Amiri: ['400', '700'] }, as for loadFonts, after it: the whole
 *  FONTS object may be passed, its families without an arabic subset are
 *  left alone. Adds the arabic file of every listed weight of each Arabic
 *  family (the latin files come from loadFonts) and loads it. `text` is
 *  the sample: fails when it holds an Arabic-script character the arabic
 *  file does not cover. List every weight the pages set in Arabic: a weight
 *  left to buildWithFonts gets the latin file only, and its Arabic letters
 *  fall back to a system face. Resolves to the number of files loaded. */
async function loadArabicFonts(faces, text = '') {
  kitStatus('Loading fonts…');
  let loaded = 0;
  try {
    const outside = [...new Set(text)].filter((ch) => /\p{Script=Arabic}/u.test(ch) && !inArabicRange(ch.codePointAt(0)));
    if (outside.length) throw new Error(`Fontsource's arabic files have no ${outside.slice(0, 12).join(' ')}`);
    for (const [family, specs] of Object.entries(faces)) {
      if (!(await isArabicFamily(family))) continue;
      for (const spec of new Set(specs)) {
        const weight = parseInt(spec, 10);
        const style = spec.endsWith('i') ? 'italic' : 'normal';
        const face = new FontFace(family, `url(${arabicFileUrl(family, weight, style)}) format('woff2')`,
          { weight: String(weight), style, unicodeRange: arabicRange() });
        document.fonts.add(await face.load().catch(() => {
          throw new Error(`Fontsource has no arabic file for ${family} ${weight} ${style}`);
        }));
        loaded++;
      }
    }
  } catch (error) {
    kitFail(error);
    throw error;
  }
  return loaded;
}

/** The PDF font provider for recipes with Arabic faces: a family with an
 *  arabic subset gets its arabic file when its pages set Arabic letters
 *  (`request.codePoints`), then its latin file, and its latin-ext file for
 *  the letters beyond latin (transliteration: ā ḥ ʿ). The arabic file comes
 *  first: it also holds the space and the brackets, so a line of Arabic is
 *  shaped as one run and not cut at every space. Any other family goes to
 *  fontsourceProvider (the "pdf" block). */
async function arabicPdfProvider(family, weight, style, request) {
  if (!(await isArabicFamily(family))) return fontsourceProvider(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 wanted = [...(request?.codePoints ?? [])];
  const id = fontsourceId(family);
  const urls = [];
  if (!wanted.length || wanted.some(inArabicRange)) urls.push(arabicFileUrl(family, w, s));
  urls.push(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-${w}-${s}.woff2`);
  if (meta.subsets.includes('latin-ext') && wanted.some((cp) => /[Ā-˿Ḁ-ỿ]/u.test(String.fromCodePoint(cp)))) {
    urls.push(`https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-latin-ext-${w}-${s}.woff2`);
  }
  return Promise.all(urls.map(async (url) => {
    const res = await fetch(url);
    if (!res.ok) throw new Error(`Fontsource file ${url} (${res.status})`);
    return decompressWoff2(new Uint8Array(await res.arrayBuffer()));
  }));
}

// ─── Kit · comics v1 ── comic pages · postext.dev/cookbook
// The engine letters a comic in a face per language (defaultComicFont:
// Comic Neue, Zen Antique for Japanese, Noto Sans SC, LXGW WenKai TC,
// Playpen Sans Arabic; defaultComicSfxFont: Bangers, Dela Gothic One,
// ZCOOL KuaiLe, Lalezar) and asks for the bold of a shout or a sound effect
// and the italic of an inner voice. Most of these faces ship one weight and
// no italic: this block declares the file Fontsource does ship for those
// variants, so the canvas measures and paints the letters the PDF embeds
// (the providers snap to the shipped file) and not a bold or a slant the
// browser makes up. It also turns the art manifest into panel resources.

/** faces = { 'Comic Neue': ['400', '700'], Bangers: ['400'] }, as for
 *  loadFonts, after it (and after loadCjkFonts or loadArabicFonts for the
 *  faces of those scripts); the whole FONTS object may be passed. List in
 *  FONTS only what Fontsource ships (Bangers: ['400']): loadFonts fails on
 *  the rest. For each family, the regular, bold, italic and bold italic it
 *  lacks are declared with its nearest file (the regular for the bold, the
 *  upright for the italic) and loaded for `text`. A CJK face needs the cjk
 *  block; an Arabic face setting Arabic, the arabic block. Resolves to the
 *  number of variants added. */
async function loadComicFonts(faces, text = '') {
  kitStatus('Loading fonts…');
  let added = 0;
  try {
    for (const family of Object.keys(faces)) {
      const meta = await fontsourceMeta(family);
      if (!meta) throw new Error(`api.fontsource.org did not describe ${family}: reload to try again`);
      const weights = meta.weights?.length ? meta.weights : [400, 700];
      const styles = meta.styles?.length ? meta.styles : ['normal'];
      for (const [weight, style] of [[400, 'normal'], [700, 'normal'], [400, 'italic'], [700, 'italic']]) {
        if ((weights.includes(weight) && styles.includes(style)) || hasFace(family, weight, style)) continue;
        const w = weights.reduce((a, b) => (Math.abs(b - weight) < Math.abs(a - weight) ? b : a));
        const s = style === 'italic' && styles.includes('italic') ? 'italic' : 'normal';
        for (const { url, range } of await comicFaceFiles(family, w, s, meta, text)) {
          document.fonts.add(new FontFace(family, `url(${url}) format('woff2')`,
            { weight: String(weight), style, unicodeRange: range }));
        }
        await document.fonts.load(`${style === 'italic' ? 'italic ' : ''}${weight} 16px "${family}"`, text || 'A');
        added++;
      }
    }
  } catch (error) {
    kitFail(error);
    throw error;
  }
  return added;
}

/** The files of a shipped face ({ url, range }): a CJK face's slices (the
 *  cjk block reads them from its stylesheet), else latin, the latin-ext
 *  and greek files `text` needs, and the arabic file when `text` holds
 *  Arabic. */
async function comicFaceFiles(family, weight, style, meta, text) {
  if (meta.subsets?.some((subset) => /^(chinese|japanese|korean)/.test(subset))) {
    if (typeof cjkSlices !== 'function') throw new Error(`${family} is a CJK face: list the cjk kit block`);
    return (await cjkSlices(family, weight, style)).map(({ url, range }) => ({ url, range }));
  }
  const id = fontsourceId(family);
  const file = (subset) => `https://cdn.jsdelivr.net/npm/@fontsource/${id}@5/files/${id}-${subset}-${weight}-${style}.woff2`;
  const files = ['latin', ...kitSubsetsFor(text, meta)].map((subset) => ({ url: file(subset), range: comicRange(subset) }));
  if (meta.subsets?.includes('arabic') && /\p{Script=Arabic}/u.test(text)) {
    if (typeof arabicRange !== 'function') throw new Error(`${family} sets Arabic: list the arabic kit block`);
    files.unshift({ url: file('arabic'), range: arabicRange() });
  }
  return files;
}

/** The unicode-range loadFonts gives a Fontsource file. A function, not a
 *  const: the kit is inlined after the recipe's top-level awaits. */
function comicRange(subset) {
  return {
    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',
    greek: 'U+0370-03FF',
  }[subset];
}

/** The PDF font provider of a comic in any script: a CJK face goes to
 *  cjkPdfProvider, an Arabic face to arabicPdfProvider, any other to
 *  fontsourceProvider (the "pdf" block). Each embeds the shipped weight
 *  and style nearest to the one asked for, the file loadComicFonts
 *  declared for the canvas. */
async function comicPdfProvider(family, weight, style, request) {
  const subsets = (await fontsourceMeta(family))?.subsets ?? [];
  if (subsets.some((subset) => /^(chinese|japanese|korean)/.test(subset))) {
    if (typeof cjkPdfProvider !== 'function') throw new Error(`${family} is a CJK face: list the cjk kit block`);
    return cjkPdfProvider(family, weight, style, request);
  }
  if (subsets.includes('arabic') && typeof arabicPdfProvider === 'function') {
    return arabicPdfProvider(family, weight, style, request);
  }
  return fontsourceProvider(family, weight, style, request);
}

/** A panel picture as a resource for art= (and pop=): loads `url`
 *  (write asset('lh-arrive.jpg') in the call, so the lint checks the file)
 *  and declares it with `meta`, its entry in the art manifest:
 *  { width, height, alt, safeArea, anchors, avoid }. The safe area is what
 *  every crop keeps, the anchors the speakers' mouths, heads and faces,
 *  the avoid zones what no balloon covers; all in fractions of the picture,
 *  the same in every language. Without width and height, the picture's own
 *  size. Needs the images block. Resolves to the resource. */
async function comicPanel(id, url, meta = {}) {
  const fileId = decodeURIComponent(url.split('/').pop());
  await loadImage(fileId, url);
  let { width, height } = meta;
  if (!width || !height) {
    const bitmap = await createImageBitmap(new Blob([imageBytes(fileId)]));
    ({ width, height } = bitmap);
    bitmap.close();
  }
  return {
    id, typeId: meta.typeId ?? 'figure', kind: 'bitmap', createdAt: 0, updatedAt: 0,
    bitmap: { fileId, format: /\.png$/i.test(fileId) ? 'png' : 'jpeg', width, height },
    ...(meta.alt && { altText: meta.alt }),
    ...(meta.safeArea && { safeArea: meta.safeArea }),
    ...(meta.anchors?.length && { anchors: meta.anchors }),
    ...(meta.avoid?.length && { avoid: meta.avoid }),
  };
}

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

## Variações

### Letreirar em maiúsculas, como um gibi americano

Ponha o letreiramento em maiúsculas; a narração e os diálogos acompanham, e as escritas sem caixa alta e baixa (chinês, japonês, árabe) ficam como estão.

```diff
-    color: col('ink'), textTransform: 'none' }, // European letterers write in mixed case
+    color: col('ink'), textTransform: 'uppercase' },
```

## Erros comuns

- **Carregue todas as fontes antes do layout.** O motor de layout mede o texto com as fontes que o navegador carregou e guarda as larguras em cache, então uma fonte que chega depois da primeira composição deixa quebras de linha erradas e um PDF que não corresponde mais à tela. Carregue antes todos os pesos e estilos e chame clearMeasurementCache() antes de recompor quando alguma chegar atrasada.
- **A configuração fica em cache pela identidade: crie um objeto novo.** O motor guarda em cache as configurações resolvidas pela identidade do objeto, então alterar uma configuração no próprio objeto e compor de novo reaproveita o resultado antigo. Crie um objeto novo a cada composição; por isso a configuração de uma receita é uma função, config().

- O corpo do letreiramento é um só para o livro inteiro: uma tradução mais longa aumenta os balões e os move, nunca encolhe a letra. Confira as páginas em catalão e em árabe depois de mudar a divisão.
- O texto alternativo de cada quadro fica no manifesto dos desenhos em sete línguas, escolhido com `t({ … })`; uma língua que falte na lista usa a primeira. `::panel{alt="…"}` num arquivo de conteúdo o substitui para um quadro.

## Créditos

- Receita: Ignacio Ferro ([@drnachio](https://github.com/drnachio))
- Texto: Las naranjas de Carmen (Carmen's Oranges), a one-page comic written for this recipe, in six languages: Postext Cookbook, CC-BY-4.0
- Imagens: A sunny Sunday in Madrid: an iron-and-glass market hall on a plaza with shoppers and pigeons.: Generated With Diffusion Models, original
- Imagens: Inside the market, Lola pulls her grandfather Paco by the hand, pointing ahead between the stalls.: Generated With Diffusion Models, original
- Imagens: Lola gazes up at a towering pyramid of oranges while Carmen, the fruit seller, polishes an orange.: Generated With Diffusion Models, original
- Imagens: Lola reaches for an orange at the bottom of the pile; Paco, alarmed, raises a hand to stop her.: Generated With Diffusion Models, original
- Imagens: The orange pyramid collapses: oranges roll everywhere, Paco's beret flies off, Carmen throws up her hands, pigeons scatter.: Generated With Diffusion Models, original
- Imagens: Lola, Paco and Carmen kneel to gather the oranges into the beret and the apron, laughing; a pigeon pecks one.: Generated With Diffusion Models, original
- Imagens: On a park bench, Lola and Paco peel oranges and laugh; a pigeon sits on Paco's beret.: Generated With Diffusion Models, original
- Tipos: Patrick Hand (OFL-1.1), Bangers (OFL-1.1), Noto Sans SC (OFL-1.1), ZCOOL KuaiLe (OFL-1.1), Zen Antique (OFL-1.1), Dela Gothic One (OFL-1.1), Playpen Sans Arabic (OFL-1.1), Lalezar (OFL-1.1)
- Código: MIT · Conteúdo de exemplo: CC-BY-4.0

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