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+<script lang="ts">
+	/**
+	 * Typography demo — the Eidos type system, same shape as the Color demo.
+	 *
+	 * Everything renders through the live CSS custom properties (so it reflects the
+	 * active theme + light/dark):
+	 *  - the SCALE: a live modular/fluid ladder built by `buildTypeScale` (the runtime
+	 *    `applyTypeScale` engine) — drag the ratio + the whole ladder re-derives, named
+	 *    styles included (they reference `--font-size-*` via `var()`);
+	 *  - the FAMILIES: the config-driven `@font-face` slots (primary/secondary/mono/display);
+	 *  - the AXES: tracking · leading · measure · wrap · numeric driven live through the
+	 *    `--_text-*` per-instance vars the recipe reads.
+	 *
+	 * Self-contained: imports the eidos foundation CSS, renders raw elements with the
+	 * recipe `data-*` attrs. `data-theme` on `.root` activates light/dark.
+	 */
+	import '@/uix/eidos/index.css'
+	import { buildTypeScale } from '$uix/eidos'
+
+	let theme = $state<'light' | 'dark'>('light')
+
+	const SIZES = ['xxs', 'xs', 'sm', 'md', 'lg', 'xl', 'xxl', 'xxxl'] as const
+	const STYLES = [
+		{ style: 'hero', label: 'Hero', sample: 'Diseñando lo que ocurre' },
+		{ style: 'h1', label: 'H1', sample: 'Una escala que respira' },
+		{ style: 'h2', label: 'H2', sample: 'Ritmo y jerarquía' },
+		{ style: 'h3', label: 'H3', sample: 'Cada paso, intencional' },
+		{ style: 'h4', label: 'H4', sample: 'Detalle tipográfico' },
+		{ style: 'body', label: 'Body', sample: 'El cuerpo de texto sostiene la lectura larga con una medida cómoda y un interlineado generoso.' },
+		{ style: 'caption', label: 'Caption', sample: 'Metadatos, pies y notas al margen' }
+	] as const
+
+	// ── Live type scale (buildTypeScale — the applyTypeScale engine) ──────────
+	let base = $state(16)
+	let ratio = $state(1.25)
+	let fluid = $state(true)
+	let ratioMax = $state(1.333)
+	let vw = $state(820)
+
+	const RATIOS = [
+		{ value: 1.125, name: 'segunda mayor' },
+		{ value: 1.2, name: 'tercera menor' },
+		{ value: 1.25, name: 'tercera mayor' },
+		{ value: 1.333, name: 'cuarta justa' },
+		{ value: 1.414, name: 'tritono' },
+		{ value: 1.5, name: 'quinta justa' },
+		{ value: 1.618, name: 'áurea' }
+	] as const
+
+	const scale = $derived(
+		buildTypeScale({
+			base,
+			ratio,
+			// keep the fluid endpoint ≥ the base ratio so the scale never inverts on wide screens
+			ratioMax: fluid ? Math.max(ratio, ratioMax) : undefined,
+			minVw: 480,
+			maxVw: 1280
+		})
+	)
+	const scaleVars = $derived(scale.variables.join(' '))
+	const ratioName = $derived(RATIOS.find((r) => Math.abs(r.value - ratio) < 0.001)?.name ?? 'custom')
+
+	// px at a chosen viewport, for the readout (linear interp between min/max viewport).
+	function pxAt(min: number, max: number): number {
+		if (min === max) return min
+		const t = Math.min(1, Math.max(0, (vw - 480) / (1280 - 480)))
+		return Math.round((min + (max - min) * t) * 100) / 100
+	}
+
+	// ── Axes playground ───────────────────────────────────────────────────────
+	const TRACKINGS = ['tighter', 'tight', 'normal', 'wide', 'wider'] as const
+	const LEADINGS = ['tight', 'snug', 'normal', 'relaxed', 'loose'] as const
+	const MEASURES = ['narrow', 'normal', 'wide'] as const
+	const WRAPS = ['pretty', 'balance', 'nowrap'] as const
+
+	let tracking = $state<(typeof TRACKINGS)[number]>('normal')
+	let leading = $state<(typeof LEADINGS)[number]>('normal')
+	let measure = $state<(typeof MEASURES)[number]>('normal')
+	let wrap = $state<(typeof WRAPS)[number]>('pretty')
+	let numeric = $state(false)
+
+	const axisStyle = $derived(
+		[
+			`--_text-letter-spacing: var(--tracking-${tracking})`,
+			`--_text-line-height: var(--leading-${leading})`,
+			`--_text-measure: var(--measure-${measure})`,
+			`--_text-wrap: ${wrap}`,
+			`--_text-font-feature: ${numeric ? 'var(--font-feature-tabular)' : 'normal'}`
+		].join('; ')
+	)
+
+	const FAMILIES = [
+		{ slot: 'primary', label: 'Primary', note: 'UI · cuerpo' },
+		{ slot: 'display', label: 'Display', note: 'titulares' },
+		{ slot: 'secondary', label: 'Secondary', note: 'prosa' },
+		{ slot: 'mono', label: 'Mono', note: 'código · cifras' }
+	] as const
+</script>
+
+<svelte:head><title>Tipografía · Eidos</title></svelte:head>
+
+<div class="root" data-theme={theme}>
+	<header class="masthead">
+		<div class="mast-row">
+			<p class="kicker">Eidos · sistema tipográfico</p>
+			<button class="theme-toggle" onclick={() => (theme = theme === 'light' ? 'dark' : 'light')}>
+				{theme === 'light' ? '◐ claro' : '◑ oscuro'}
+			</button>
+		</div>
+		<h1 class="mast-title" style="font-size: var(--font-size-xxxl)">Tipografía que se construye sola</h1>
+		<p class="mast-lede">
+			Escala fluida derivada de un ratio · familias config-driven · ejes ópticos en vivo.
+			Todo a través de los tokens del motor — mueve un control y mira recomponerse.
+		</p>
+	</header>
+
+	<!-- ── Escala (live) ──────────────────────────────────────────────────── -->
+	<section class="section">
+		<div class="sec-head">
+			<h2 class="sec-title">Escala</h2>
+			<p class="sec-note">
+				<code>buildTypeScale</code> · el motor de <code>applyTypeScale</code>. Un ratio modular
+				deriva los 8 pasos desde <code>md</code>; con fluido el ratio interpola entre 480 y 1280px.
+			</p>
+		</div>
+
+		<div class="controls">
+			<label class="ctrl">
+				<span class="ctrl-label">base <em>{base}px</em></span>
+				<input type="range" min="13" max="20" step="1" bind:value={base} />
+			</label>
+			<label class="ctrl">
+				<span class="ctrl-label">ratio <em>{ratio.toFixed(3)} · {ratioName}</em></span>
+				<input type="range" min="1.1" max="1.7" step="0.001" bind:value={ratio} />
+			</label>
+			<div class="ctrl chips-ctrl">
+				<span class="ctrl-label">presets</span>
+				<div class="chips">
+					{#each RATIOS as r}
+						<button class="chip" data-on={Math.abs(r.value - ratio) < 0.001} onclick={() => (ratio = r.value)}>{r.value}</button>
+					{/each}
+				</div>
+			</div>
+			<label class="ctrl switch-ctrl">
+				<span class="ctrl-label">fluido</span>
+				<input type="checkbox" bind:checked={fluid} />
+			</label>
+			{#if fluid}
+				<label class="ctrl">
+					<span class="ctrl-label">ratio máx <em>{ratioMax.toFixed(3)}</em></span>
+					<input type="range" min={ratio} max="1.8" step="0.001" bind:value={ratioMax} />
+				</label>
+				<label class="ctrl">
+					<span class="ctrl-label">viewport <em>{vw}px</em></span>
+					<input type="range" min="480" max="1280" step="10" bind:value={vw} />
+				</label>
+			{/if}
+		</div>
+
+		<div class="ladder" style={scaleVars}>
+			{#each scale.sizes as s}
+				<div class="rung">
+					<span class="rung-key">{s.key}</span>
+					<span class="rung-sample" style="font-size: var(--font-size-{s.key})">Grumpy wizards</span>
+					<span class="rung-val">
+						{#if s.minPx === s.maxPx}{s.minPx}px{:else}{pxAt(s.minPx, s.maxPx)}px <i>·{s.minPx}–{s.maxPx}</i>{/if}
+					</span>
+				</div>
+			{/each}
+		</div>
+	</section>
+
+	<!-- ── Estilos nombrados (reflejan la escala) ─────────────────────────── -->
+	<section class="section">
+		<div class="sec-head">
+			<h2 class="sec-title">Estilos nombrados</h2>
+			<p class="sec-note">
+				<code>hero · h1–h6 · body · caption</code> referencian <code>--font-size-*</code> por
+				<code>var()</code> → re-escalan con el ratio de arriba.
+			</p>
+		</div>
+		<div class="styles" style={scaleVars}>
+			{#each STYLES as st}
+				<div class="style-row">
+					<span class="style-tag">{st.label}</span>
+					{#if st.style === 'body' || st.style === 'caption'}
+						<p data-text data-style={st.style} class="style-sample">{st.sample}</p>
+					{:else}
+						<div data-heading data-style={st.style} class="style-sample">{st.sample}</div>
+					{/if}
+				</div>
+			{/each}
+		</div>
+	</section>
+
+	<!-- ── Familias ───────────────────────────────────────────────────────── -->
+	<section class="section">
+		<div class="sec-head">
+			<h2 class="sec-title">Familias</h2>
+			<p class="sec-note"><code>@font-face</code> config-driven · fallback con métricas (anti-CLS).</p>
+		</div>
+		<div class="families">
+			{#each FAMILIES as f}
+				<div class="family">
+					<div class="family-meta"><span class="family-label">{f.label}</span><span class="family-note">{f.note}</span></div>
+					<div class="family-sample" style="font-family: var(--font-family-{f.slot})">
+						<span class="family-aa">Aa</span>
+						<span class="family-glyphs">Habría jugado · 0123456789 · ¿Qué? ¡Ya!</span>
+					</div>
+				</div>
+			{/each}
+		</div>
+	</section>
+
+	<!-- ── Ejes (live) ────────────────────────────────────────────────────── -->
+	<section class="section">
+		<div class="sec-head">
+			<h2 class="sec-title">Ejes ópticos</h2>
+			<p class="sec-note">tracking · leading · measure · wrap · numeric — vía los <code>--_text-*</code> que lee el recipe.</p>
+		</div>
+		<div class="controls">
+			<div class="ctrl chips-ctrl">
+				<span class="ctrl-label">tracking</span>
+				<div class="chips">{#each TRACKINGS as t}<button class="chip" data-on={tracking === t} onclick={() => (tracking = t)}>{t}</button>{/each}</div>
+			</div>
+			<div class="ctrl chips-ctrl">
+				<span class="ctrl-label">leading</span>
+				<div class="chips">{#each LEADINGS as l}<button class="chip" data-on={leading === l} onclick={() => (leading = l)}>{l}</button>{/each}</div>
+			</div>
+			<div class="ctrl chips-ctrl">
+				<span class="ctrl-label">measure</span>
+				<div class="chips">{#each MEASURES as m}<button class="chip" data-on={measure === m} onclick={() => (measure = m)}>{m}</button>{/each}</div>
+			</div>
+			<div class="ctrl chips-ctrl">
+				<span class="ctrl-label">wrap</span>
+				<div class="chips">{#each WRAPS as w}<button class="chip" data-on={wrap === w} onclick={() => (wrap = w)}>{w}</button>{/each}</div>
+			</div>
+			<label class="ctrl switch-ctrl">
+				<span class="ctrl-label">tabular</span>
+				<input type="checkbox" bind:checked={numeric} />
+			</label>
+		</div>
+		<div class="axis-stage">
+			<p data-text data-style="prose" class="axis-sample" style={axisStyle}>
+				La tipografía no es lo que ves, es lo que ocurre cuando lees: 1.250 palabras, 48px de
+				salto, 66ch de medida. El tracking se afina, el interlineado respira, la columna se
+				contiene — y el texto desaparece para dejar pasar el sentido.
+			</p>
+		</div>
+	</section>
+</div>
+
+<style>
+	.root {
+		min-block-size: 100vh;
+		background: var(--color-surface-default);
+		color: var(--color-content-primary);
+		font-family: var(--font-family-primary);
+		padding: clamp(1.5rem, 5vw, 5rem) clamp(1.25rem, 5vw, 6rem) 8rem;
+		--rule: color-mix(in srgb, var(--color-border-default) 100%, transparent);
+	}
+
+	.masthead {
+		max-inline-size: 60rem;
+		margin-block-end: clamp(3rem, 8vw, 6rem);
+	}
+	.mast-row {
+		display: flex;
+		align-items: center;
+		justify-content: space-between;
+		gap: 1rem;
+		margin-block-end: 2.5rem;
+	}
+	.kicker {
+		margin: 0;
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		letter-spacing: 0.18em;
+		text-transform: uppercase;
+		color: var(--color-content-muted);
+	}
+	.theme-toggle {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		letter-spacing: 0.06em;
+		color: var(--color-content-secondary);
+		background: var(--color-surface-raised);
+		border: 1px solid var(--rule);
+		border-radius: 999px;
+		padding: 0.5rem 1rem;
+		cursor: pointer;
+	}
+	.theme-toggle:hover { color: var(--color-content-primary); }
+	.mast-title {
+		font-family: var(--font-family-display);
+		font-weight: 600;
+		line-height: 1;
+		letter-spacing: -0.03em;
+		margin: 0 0 1.25rem;
+		text-wrap: balance;
+	}
+	.mast-lede {
+		max-inline-size: 42ch;
+		font-size: var(--font-size-lg);
+		line-height: 1.5;
+		color: var(--color-content-secondary);
+		margin: 0;
+		text-wrap: pretty;
+	}
+
+	.section { margin-block-end: clamp(3.5rem, 9vw, 7rem); }
+	.sec-head {
+		display: flex;
+		flex-wrap: wrap;
+		align-items: baseline;
+		gap: 0.75rem 2rem;
+		padding-block-end: 1.25rem;
+		margin-block-end: 2rem;
+		border-block-end: 1px solid var(--rule);
+	}
+	.sec-title {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		font-weight: 500;
+		letter-spacing: 0.16em;
+		text-transform: uppercase;
+		color: var(--color-content-primary);
+		margin: 0;
+	}
+	.sec-note {
+		margin: 0;
+		max-inline-size: 56ch;
+		font-size: var(--font-size-sm);
+		line-height: 1.5;
+		color: var(--color-content-muted);
+	}
+	.sec-note code, .rung-val i, .family-note {
+		font-family: var(--font-family-mono);
+	}
+	.sec-note code {
+		font-size: 0.92em;
+		color: var(--color-content-secondary);
+		background: var(--color-surface-muted);
+		padding: 0.1em 0.4em;
+		border-radius: 4px;
+	}
+
+	/* Controls */
+	.controls {
+		display: flex;
+		flex-wrap: wrap;
+		gap: 1.25rem 2.5rem;
+		margin-block-end: 2.5rem;
+		padding: 1.5rem;
+		background: var(--color-surface-raised);
+		border: 1px solid var(--rule);
+		border-radius: 14px;
+	}
+	.ctrl { display: flex; flex-direction: column; gap: 0.6rem; min-inline-size: 13rem; }
+	.ctrl-label {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		letter-spacing: 0.08em;
+		text-transform: uppercase;
+		color: var(--color-content-muted);
+		display: flex;
+		justify-content: space-between;
+		gap: 1rem;
+	}
+	.ctrl-label em { font-style: normal; color: var(--color-content-primary); text-transform: none; letter-spacing: 0; }
+	input[type='range'] { width: 100%; accent-color: var(--color-primary-solid); cursor: pointer; }
+	.switch-ctrl { flex-direction: row; align-items: center; gap: 0.75rem; min-inline-size: 0; }
+	.switch-ctrl input { accent-color: var(--color-primary-solid); inline-size: 1.1rem; block-size: 1.1rem; }
+	.chips-ctrl { min-inline-size: 0; }
+	.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
+	.chip {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		color: var(--color-content-secondary);
+		background: var(--color-surface-default);
+		border: 1px solid var(--rule);
+		border-radius: 7px;
+		padding: 0.3rem 0.6rem;
+		cursor: pointer;
+	}
+	.chip[data-on='true'] {
+		color: var(--color-primary-on-solid, #fff);
+		background: var(--color-primary-solid);
+		border-color: var(--color-primary-solid);
+	}
+
+	/* Ladder */
+	.ladder { display: flex; flex-direction: column; }
+	.rung {
+		display: grid;
+		grid-template-columns: 3.5rem 1fr auto;
+		align-items: baseline;
+		gap: 1.5rem;
+		padding-block: 0.6rem;
+		border-block-end: 1px solid color-mix(in srgb, var(--rule) 55%, transparent);
+	}
+	.rung-key {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		color: var(--color-content-muted);
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+	}
+	.rung-sample {
+		font-family: var(--font-family-display);
+		line-height: 1.05;
+		letter-spacing: -0.01em;
+		color: var(--color-content-primary);
+		white-space: nowrap;
+		overflow: hidden;
+		text-overflow: ellipsis;
+	}
+	.rung-val {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		color: var(--color-content-secondary);
+		white-space: nowrap;
+	}
+	.rung-val i { color: var(--color-content-muted); font-style: normal; }
+
+	/* Named styles */
+	.styles { display: flex; flex-direction: column; gap: 1.75rem; }
+	.style-row { display: grid; grid-template-columns: 4rem 1fr; gap: 1.5rem; align-items: baseline; }
+	.style-tag {
+		font-family: var(--font-family-mono);
+		font-size: var(--font-size-xs);
+		color: var(--color-content-muted);
+		text-transform: uppercase;
+		letter-spacing: 0.06em;
+		padding-block-start: 0.4em;
+	}
+	.style-sample { margin: 0; color: var(--color-content-primary); text-wrap: balance; }
+
+	/* Families */
+	.families { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 14px; overflow: hidden; }
+	.family { background: var(--color-surface-default); padding: 1.75rem; display: flex; flex-direction: column; gap: 1.1rem; }
+	.family-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
+	.family-label { font-family: var(--font-family-mono); font-size: var(--font-size-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-content-primary); }
+	.family-note { font-size: var(--font-size-xs); color: var(--color-content-muted); }
+	.family-sample { display: flex; flex-direction: column; gap: 0.5rem; color: var(--color-content-primary); }
+	.family-aa { font-size: var(--font-size-xxl); line-height: 1; letter-spacing: -0.02em; }
+	.family-glyphs { font-size: var(--font-size-sm); color: var(--color-content-secondary); }
+
+	/* Axis stage */
+	.axis-stage {
+		padding: clamp(1.5rem, 4vw, 3.5rem);
+		background: var(--color-surface-raised);
+		border: 1px solid var(--rule);
+		border-radius: 14px;
+	}
+	.axis-sample { margin: 0; color: var(--color-content-primary); font-size: var(--font-size-lg); }
+</style>