diff --git a/web/routes/temas/tema/+page.svelte b/web/routes/temas/tema/+page.svelte
new file mode 100644
index 000000000..0029fee86
--- /dev/null
+++ b/web/routes/temas/tema/+page.svelte
@@ -0,0 +1,414 @@
+<script lang="ts">
+	/**
+	 * Tema — the runtime theme capstone made tangible.
+	 *
+	 * One seed → the five runtime builders (color · type · depth · shape · space)
+	 * composed in a SINGLE `uix.eidos.applyTheme(seed)` call. The preview is a
+	 * mini-app hand-built from FOUNDATION tokens (--color-{role}-* · --space-* ·
+	 * --radius-* · --font-size-* + data-shape / data-depth) — exactly the surface
+	 * applyTheme retunes. The call is scoped to `[data-tema-preview]`, so the whole
+	 * preview re-skins while the control chrome stays put.
+	 *
+	 * Self-contained: boots its own minimal ActiveUix + ActiveEidos (applyDom) so
+	 * it calls the REAL applyTheme, not a re-implementation.
+	 */
+	import { onDestroy } from 'svelte'
+	import { createActiveUix, setActiveUix } from '$active-uix'
+	import { siumLangs } from '$sium/langs/langs'
+	import { secsLangs } from '$libs/secs'
+	import { ActiveEidos } from '$uix/eidos'
+	import '@/uix/eidos/index.css'
+
+	// ── Runtime (minimal — no Soma/events; the preview is token-driven markup) ──
+	const uix = createActiveUix({
+		langs: { schema: { sium: siumLangs, secs: secsLangs }, defaultLocale: 'es' as const },
+		events: { sound: false, haptic: false }
+	})
+	setActiveUix(uix)
+	const eidos = ActiveEidos.create({ applyDom: true })
+	onDestroy(() => {
+		eidos.dispose()
+		uix.dispose()
+	})
+
+	type Family = 'rounded' | 'continuous' | 'cut'
+
+	// ── The seed (five axes) ─────────────────────────────────────────────────
+	let colorSeed = $state('#6366f1')
+	let ratio = $state(1.25)
+	let smoothing = $state(2)
+	let depth = $state(0.5) // 0 flat → 1 dramatic
+	let spaceBase = $state(4)
+	let family = $state<Family>('continuous')
+	let mode = $state<'light' | 'dark'>('dark')
+	let activePreset = $state<string | null>('aurora')
+
+	// ── The single call: one seed → five builders, scoped to the preview ───────
+	$effect(() => {
+		const i = depth
+		const raisedShadow = `0 ${Math.round(1 + i * 3)}px ${Math.round(5 + i * 16)}px rgb(0 0 0 / ${(
+			0.05 +
+			i * 0.22
+		).toFixed(3)})`
+		const overlayShadow = `0 ${Math.round(8 + i * 24)}px ${Math.round(24 + i * 46)}px rgb(0 0 0 / ${(
+			0.14 +
+			i * 0.4
+		).toFixed(3)})`
+		eidos.applyTheme(
+			{
+				color: colorSeed,
+				type: { base: 16, ratio },
+				shape: { smoothing },
+				depth: { raised: { shadow: raisedShadow }, overlay: { shadow: overlayShadow } },
+				space: { base: spaceBase }
+			},
+			{ selector: '[data-tema-preview]', color: { mode } }
+		)
+	})
+
+	// ── Presets — one click sets all five axes (a whole personality) ───────────
+	type Preset = {
+		id: string
+		label: string
+		blurb: string
+		color: string
+		ratio: number
+		smoothing: number
+		depth: number
+		spaceBase: number
+		family: Family
+	}
+	const PRESETS: Preset[] = [
+		{ id: 'aurora', label: 'Aurora', blurb: 'índigo · squircle · flotante', color: '#6366f1', ratio: 1.25, smoothing: 2.2, depth: 0.7, spaceBase: 4, family: 'continuous' },
+		{ id: 'editorial', label: 'Editorial', blurb: 'ciruela · escala alta · sutil', color: '#8e4ec6', ratio: 1.333, smoothing: 2, depth: 0.3, spaceBase: 5, family: 'continuous' },
+		{ id: 'brutalist', label: 'Brutalist', blurb: 'rojo · cortado · plano · denso', color: '#dc2626', ratio: 1.2, smoothing: 1, depth: 0.08, spaceBase: 3, family: 'cut' },
+		{ id: 'mint', label: 'Mint', blurb: 'jade · suave · aireado', color: '#12a594', ratio: 1.18, smoothing: 2.4, depth: 0.45, spaceBase: 6, family: 'continuous' },
+		{ id: 'sunset', label: 'Sunset', blurb: 'ámbar · squircle · cálido', color: '#ea580c', ratio: 1.28, smoothing: 2.1, depth: 0.55, spaceBase: 4, family: 'continuous' }
+	]
+	function applyPreset(p: Preset): void {
+		colorSeed = p.color
+		ratio = p.ratio
+		smoothing = p.smoothing
+		depth = p.depth
+		spaceBase = p.spaceBase
+		family = p.family
+		activePreset = p.id
+	}
+
+	const SWATCHES = [
+		'#6366f1', '#8e4ec6', '#db2777', '#dc2626', '#ea580c',
+		'#d97706', '#12a594', '#06b6d4', '#2563eb', '#475569'
+	]
+	function setSeed(v: string): void {
+		colorSeed = v
+		activePreset = null
+	}
+	// any manual tweak detaches the active preset chip
+	function tweak(): void {
+		activePreset = null
+	}
+
+	const codeSeed = $derived(
+		`uix.eidos.applyTheme({
+  color: '${colorSeed}',
+  type:  { base: 16, ratio: ${ratio.toFixed(3)} },
+  shape: { smoothing: ${smoothing.toFixed(2)} },
+  depth: { raised: { shadow: … }, overlay: { shadow: … } },
+  space: { base: ${spaceBase} }
+})`
+	)
+
+	let progress = $state(68)
+	let toggleOn = $state(true)
+</script>
+
+<svelte:head><title>Tema · Eidos</title></svelte:head>
+
+<div class="root" data-theme="dark">
+	<header class="masthead">
+		<p class="kicker">Eidos · capstone de tema en runtime</p>
+		<h1 class="mast-title">Un tema, <em>una semilla</em></h1>
+		<p class="mast-lede">
+			Color, tipografía, profundidad, forma y espacio son cinco ejes — y
+			<code>applyTheme(seed)</code> los compone en <strong>una sola llamada</strong>. Mueve un
+			control o pulsa un preset: el preview entero se reentona a la vez. Lo demás de la página no se
+			toca — la llamada está <em>scopeada</em> a la región del preview.
+		</p>
+	</header>
+
+	<div class="lab">
+		<!-- ── Control panel (the seed) ─────────────────────────────────── -->
+		<aside class="panel">
+			<div class="ctl">
+				<span class="ctl-label">presets · una personalidad</span>
+				<div class="presets">
+					{#each PRESETS as p}
+						<button
+							class="preset"
+							data-active={activePreset === p.id}
+							onclick={() => applyPreset(p)}
+						>
+							<span class="preset-dot" style="background: {p.color}"></span>
+							<span class="preset-text">
+								<strong>{p.label}</strong>
+								<small>{p.blurb}</small>
+							</span>
+						</button>
+					{/each}
+				</div>
+			</div>
+
+			<div class="ctl">
+				<span class="ctl-label">color · semilla de marca</span>
+				<div class="swatches">
+					{#each SWATCHES as s}
+						<button
+							class="swatch"
+							data-active={colorSeed.toLowerCase() === s.toLowerCase()}
+							style="background: {s}"
+							aria-label={s}
+							onclick={() => setSeed(s)}
+						></button>
+					{/each}
+					<label class="swatch-pick" title="color personalizado">
+						<input type="color" bind:value={colorSeed} oninput={tweak} />
+					</label>
+				</div>
+			</div>
+
+			<div class="ctl">
+				<span class="ctl-label">tipografía · ratio modular</span>
+				<input type="range" min="1.1" max="1.4" step="0.01" bind:value={ratio} oninput={tweak} />
+				<span class="ctl-val">{ratio.toFixed(3)} · {ratio < 1.2 ? 'compacta' : ratio > 1.3 ? 'dramática' : 'equilibrada'}</span>
+			</div>
+
+			<div class="ctl">
+				<span class="ctl-label">forma · continuidad (squircle)</span>
+				<input type="range" min="1" max="3" step="0.05" bind:value={smoothing} oninput={tweak} />
+				<span class="ctl-val">{smoothing.toFixed(2)} · {smoothing < 1.3 ? 'arco' : smoothing < 2.2 ? 'squircle' : 'superelipse'}</span>
+				<div class="chips">
+					{#each ['rounded', 'continuous', 'cut'] as const as f}
+						<button class="chip" data-active={family === f} onclick={() => { family = f; tweak() }}>{f}</button>
+					{/each}
+				</div>
+			</div>
+
+			<div class="ctl">
+				<span class="ctl-label">profundidad · elevación</span>
+				<input type="range" min="0" max="1" step="0.01" bind:value={depth} oninput={tweak} />
+				<span class="ctl-val">{depth < 0.15 ? 'plano' : depth > 0.7 ? 'flotante' : 'elevado'}</span>
+			</div>
+
+			<div class="ctl">
+				<span class="ctl-label">espacio · unidad base</span>
+				<input type="range" min="3" max="6" step="0.5" bind:value={spaceBase} oninput={tweak} />
+				<span class="ctl-val">{spaceBase}px · {spaceBase < 4 ? 'denso' : spaceBase > 5 ? 'aireado' : 'cómodo'}</span>
+			</div>
+
+			<code class="panel-code">{codeSeed}</code>
+		</aside>
+
+		<!-- ── Preview (the themed mini-app) — scoped target of applyTheme ── -->
+		<div class="stage">
+			<div class="stage-bar">
+				<span class="stage-tag">[data-tema-preview]</span>
+				<button class="mode-toggle" onclick={() => (mode = mode === 'light' ? 'dark' : 'light')}>
+					{mode === 'light' ? '◐ claro' : '◑ oscuro'}
+				</button>
+			</div>
+
+			<div class="preview" data-tema-preview data-theme={mode}>
+				<div class="tp-card" data-depth="overlay" data-shape={family}>
+					<div class="tp-head">
+						<span class="tp-avatar">N</span>
+						<div class="tp-meta">
+							<span class="tp-title">Nocturne Studio</span>
+							<span class="tp-sub">Plan Pro · activo</span>
+						</div>
+						<span class="tp-badge" data-shape={family}>FLAC</span>
+					</div>
+
+					<p class="tp-body">
+						Una semilla compone los cinco ejes perceptuales. Cambia el color y mira la jerarquía
+						reproyectarse; sube la escala y el ritmo respira.
+					</p>
+
+					<div class="tp-stats">
+						<div class="tp-stat"><b>2.4k</b><small>oyentes</small></div>
+						<div class="tp-stat"><b>128</b><small>pistas</small></div>
+						<div class="tp-stat"><b>97%</b><small>uptime</small></div>
+					</div>
+
+					<div class="tp-track">
+						<div class="tp-fill" style="inline-size: {progress}%"></div>
+					</div>
+
+					<div class="tp-row">
+						<input class="tp-input" data-shape={family} placeholder="buscar en la biblioteca…" />
+						<button class="tp-btn tp-btn-primary" data-shape={family}>Reproducir</button>
+					</div>
+
+					<div class="tp-actions">
+						<button class="tp-btn tp-btn-soft" data-shape={family}>Compartir</button>
+						<button class="tp-btn tp-btn-ghost" data-shape={family}>Cola</button>
+						<label class="tp-switch">
+							<input type="checkbox" bind:checked={toggleOn} />
+							<span class="tp-switch-track" data-shape={family}><span class="tp-switch-thumb"></span></span>
+							<span class="tp-switch-label">Crossfade</span>
+						</label>
+					</div>
+
+					<div class="tp-chips">
+						<span class="tp-chip" data-shape={family} data-intent="affirm">Sincronizado</span>
+						<span class="tp-chip" data-shape={family} data-intent="risk">Beta</span>
+						<span class="tp-chip" data-shape={family}>Hi-Fi</span>
+					</div>
+				</div>
+			</div>
+		</div>
+	</div>
+
+	<footer class="footnote">
+		<p>
+			<strong>El sexteto de la jaula abierta, en una llamada.</strong> Los cinco builders
+			(<code>applyColorScheme</code> · <code>applyTypeScale</code> · <code>applyShape</code> ·
+			<code>applyDepth</code> · <code>applySpacing</code>) componen vía
+			<code>applyTheme(seed)</code> en una escritura gestionada, atómica: los ejes que das se
+			aplican, los que omites revierten a la foundation. Ningún referente reúne los cinco ejes
+			perceptuales bajo un único builder de tema en runtime.
+		</p>
+	</footer>
+</div>
+
+<style>
+	.root {
+		min-block-size: 100vh;
+		background:
+			radial-gradient(130% 90% at 50% -10%, #1c1b2e, transparent 55%),
+			#0c0c12;
+		color: #e7e7ef;
+		font-family: var(--font-family-primary, system-ui, sans-serif);
+		padding: clamp(1.5rem, 5vw, 4.5rem) clamp(1.25rem, 5vw, 5rem) 6rem;
+	}
+
+	.masthead { max-inline-size: 56rem; margin-block-end: clamp(2.5rem, 6vw, 4.5rem); }
+	.kicker { margin: 0 0 1.5rem; font-family: var(--font-family-mono, monospace); font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase; color: #8b8ba7; }
+	.mast-title { font-family: var(--font-family-display, serif); font-size: clamp(2.4rem, 7vw, 4.5rem); font-weight: 600; line-height: 1; letter-spacing: -0.03em; margin: 0 0 1.25rem; }
+	.mast-title em { font-style: italic; color: #a5b4fc; }
+	.mast-lede { max-inline-size: 54ch; font-size: 1.05rem; line-height: 1.55; color: #b6b6c8; margin: 0; text-wrap: pretty; }
+	.mast-lede strong { color: #fff; font-weight: 600; }
+	.mast-lede em { color: #a5b4fc; font-style: normal; font-weight: 600; }
+	code { font-family: var(--font-family-mono, monospace); font-size: 0.88em; color: #c7d2fe; background: #ffffff14; padding: 0.1em 0.4em; border-radius: 5px; }
+
+	.lab { display: grid; grid-template-columns: 1fr; gap: clamp(1.5rem, 4vw, 2.5rem); align-items: start; }
+	@media (min-width: 60rem) { .lab { grid-template-columns: 22rem 1fr; } }
+
+	/* ── Control panel ── */
+	.panel { display: flex; flex-direction: column; gap: 1.6rem; padding: clamp(1.25rem, 3vw, 1.75rem); border-radius: 18px; background: #15151f; border: 1px solid #2a2a3a; }
+	.ctl { display: flex; flex-direction: column; gap: 0.6rem; }
+	.ctl-label { font-family: var(--font-family-mono, monospace); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; color: #8b8ba7; }
+	.ctl input[type='range'] { accent-color: #818cf8; inline-size: 100%; }
+	.ctl-val { font-family: var(--font-family-mono, monospace); font-size: 0.72rem; color: #d8d8e8; }
+
+	.presets { display: flex; flex-direction: column; gap: 0.4rem; }
+	.preset { display: flex; align-items: center; gap: 0.7rem; padding: 0.55rem 0.7rem; border-radius: 11px; cursor: pointer; background: #1d1d2b; border: 1px solid #2a2a3a; text-align: start; color: inherit; }
+	.preset:hover { border-color: #3d3d52; }
+	.preset[data-active='true'] { border-color: #818cf8; background: #20203a; }
+	.preset-dot { inline-size: 1.5rem; block-size: 1.5rem; border-radius: 7px; flex: none; box-shadow: inset 0 0 0 1px #ffffff22; }
+	.preset-text { display: flex; flex-direction: column; min-inline-size: 0; }
+	.preset-text strong { font-size: 0.85rem; }
+	.preset-text small { font-family: var(--font-family-mono, monospace); font-size: 0.64rem; color: #8b8ba7; }
+
+	.swatches { display: flex; flex-wrap: wrap; gap: 0.4rem; }
+	.swatch { inline-size: 1.75rem; block-size: 1.75rem; border-radius: 8px; cursor: pointer; border: 2px solid transparent; box-shadow: inset 0 0 0 1px #ffffff22; padding: 0; }
+	.swatch[data-active='true'] { border-color: #fff; }
+	.swatch-pick { inline-size: 1.75rem; block-size: 1.75rem; border-radius: 8px; overflow: hidden; border: 1px dashed #4a4a60; display: grid; place-items: center; cursor: pointer; }
+	.swatch-pick input { inline-size: 200%; block-size: 200%; cursor: pointer; border: 0; padding: 0; background: none; }
+
+	.chips { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-block-start: 0.3rem; }
+	.chip { font-family: var(--font-family-mono, monospace); font-size: 0.68rem; padding: 0.3rem 0.6rem; border-radius: 999px; cursor: pointer; background: #1d1d2b; color: #b6b6c8; border: 1px solid #2a2a3a; }
+	.chip[data-active='true'] { background: #818cf8; color: #14142a; border-color: #818cf8; }
+
+	.panel-code { display: block; white-space: pre; font-family: var(--font-family-mono, monospace); font-size: 0.66rem; line-height: 1.5; padding: 0.85rem; border-radius: 11px; background: #0d0d15; color: #a5b4fc; border: 1px solid #2a2a3a; overflow-x: auto; }
+
+	/* ── Stage + preview ── */
+	.stage { display: flex; flex-direction: column; gap: 0.75rem; }
+	.stage-bar { display: flex; align-items: center; justify-content: space-between; padding-inline: 0.25rem; }
+	.stage-tag { font-family: var(--font-family-mono, monospace); font-size: 0.68rem; color: #8b8ba7; }
+	.mode-toggle { font-family: var(--font-family-mono, monospace); font-size: 0.7rem; color: #d8d8e8; background: #1d1d2b; border: 1px solid #2a2a3a; border-radius: 999px; padding: 0.4rem 0.85rem; cursor: pointer; }
+	.mode-toggle:hover { border-color: #3d3d52; }
+
+	/* the scoped target: everything inside reads the applyTheme'd tokens */
+	.preview {
+		border-radius: 20px;
+		padding: clamp(1.5rem, 4vw, 3rem);
+		background:
+			radial-gradient(120% 80% at 50% 0%, color-mix(in oklab, var(--color-primary-solid) 14%, var(--color-surface-default)), var(--color-surface-default));
+		border: 1px solid var(--color-border-subtle);
+		display: grid;
+		place-items: center;
+		min-block-size: 30rem;
+		transition: background 200ms ease;
+	}
+
+	.tp-card {
+		inline-size: 100%;
+		max-inline-size: 26rem;
+		border-radius: var(--radius-xl);
+		background: var(--color-surface-raised);
+		border: 1px solid var(--color-border-default);
+		box-shadow: var(--depth-overlay-shadow), var(--depth-overlay-halo);
+		padding: var(--space-5);
+		display: flex;
+		flex-direction: column;
+		gap: var(--space-4);
+		color: var(--color-content-primary);
+	}
+	.tp-head { display: flex; align-items: center; gap: var(--space-3); }
+	.tp-avatar { inline-size: 2.6rem; block-size: 2.6rem; border-radius: 50%; display: grid; place-items: center; background: var(--color-primary-solid); color: var(--color-primary-contrast, #fff); font-weight: 600; font-size: var(--font-size-md); flex: none; }
+	.tp-meta { display: flex; flex-direction: column; flex: 1; min-inline-size: 0; }
+	.tp-title { font-family: var(--font-family-display, serif); font-weight: 600; font-size: var(--font-size-lg); color: var(--color-content-primary); }
+	.tp-sub { font-size: var(--font-size-xs); color: var(--color-content-muted); }
+	.tp-badge { font-family: var(--font-family-mono, monospace); font-size: 0.62rem; letter-spacing: 0.06em; padding: 0.25rem 0.55rem; border-radius: var(--radius-sm); background: var(--color-primary-surface); color: var(--color-primary-text, var(--color-primary-solid)); border: 1px solid var(--color-primary-border); }
+	.tp-body { margin: 0; font-size: var(--font-size-sm); line-height: 1.55; color: var(--color-content-secondary); }
+
+	.tp-stats { display: flex; gap: var(--space-3); }
+	.tp-stat { display: flex; flex-direction: column; gap: 0.1rem; flex: 1; padding: var(--space-2-5); border-radius: var(--radius-md); background: var(--color-surface-muted); }
+	.tp-stat b { font-size: var(--font-size-lg); color: var(--color-content-primary); }
+	.tp-stat small { font-size: var(--font-size-xs); color: var(--color-content-muted); }
+
+	.tp-track { block-size: 6px; border-radius: 999px; background: var(--color-surface-muted); overflow: hidden; }
+	.tp-fill { block-size: 100%; background: var(--color-primary-solid); transition: inline-size 250ms ease; }
+
+	.tp-row { display: flex; gap: var(--space-2); }
+	.tp-input { flex: 1; min-inline-size: 0; padding: var(--space-2-5) var(--space-3); border-radius: var(--radius-md); border: 1px solid var(--color-border-default); background: var(--color-surface-default); color: var(--color-content-primary); font: inherit; font-size: var(--font-size-sm); outline: none; }
+	.tp-input:focus { border-color: var(--color-primary-border); }
+
+	.tp-btn { font-family: inherit; font-size: var(--font-size-sm); font-weight: 500; padding: var(--space-2-5) var(--space-4); border-radius: var(--radius-md); border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
+	.tp-btn-primary { background: var(--color-primary-solid); color: var(--color-primary-contrast, #fff); }
+	.tp-btn-primary:hover { background: var(--color-primary-solid-hover); }
+	.tp-btn-soft { background: var(--color-primary-surface); color: var(--color-primary-text, var(--color-primary-solid)); border-color: var(--color-primary-border); }
+	.tp-btn-ghost { background: transparent; color: var(--color-content-secondary); }
+	.tp-btn-ghost:hover { background: var(--color-surface-muted); }
+
+	.tp-actions { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
+	.tp-switch { display: inline-flex; align-items: center; gap: var(--space-2); cursor: pointer; margin-inline-start: auto; font-size: var(--font-size-xs); color: var(--color-content-secondary); }
+	.tp-switch input { position: absolute; opacity: 0; pointer-events: none; }
+	.tp-switch-track { inline-size: 2.2rem; block-size: 1.25rem; border-radius: 999px; background: var(--color-surface-muted); border: 1px solid var(--color-border-default); position: relative; transition: background 150ms ease; }
+	.tp-switch-thumb { position: absolute; inset-block-start: 1px; inset-inline-start: 1px; inline-size: 1rem; block-size: 1rem; border-radius: 50%; background: var(--color-content-muted); transition: transform 150ms ease, background 150ms ease; }
+	.tp-switch input:checked + .tp-switch-track { background: var(--color-primary-solid); border-color: var(--color-primary-solid); }
+	.tp-switch input:checked + .tp-switch-track .tp-switch-thumb { transform: translateX(0.95rem); background: #fff; }
+
+	.tp-chips { display: flex; flex-wrap: wrap; gap: var(--space-2); }
+	.tp-chip { font-size: var(--font-size-xs); padding: var(--space-1) var(--space-2-5); border-radius: var(--radius-sm); background: var(--color-surface-muted); color: var(--color-content-secondary); }
+	.tp-chip[data-intent='affirm'] { background: var(--color-affirm-surface); color: var(--color-affirm-text, var(--color-affirm-solid)); }
+	.tp-chip[data-intent='risk'] { background: var(--color-risk-surface); color: var(--color-risk-text, var(--color-risk-solid)); }
+
+	.footnote { max-inline-size: 60rem; margin-block-start: clamp(2.5rem, 6vw, 4rem); padding-block-start: 2rem; border-block-start: 1px solid #2a2a3a; }
+	.footnote p { margin: 0; font-size: 0.92rem; line-height: 1.6; color: #b6b6c8; text-wrap: pretty; }
+	.footnote strong { color: #fff; }
+
+	@media (prefers-reduced-motion: reduce) {
+		.tp-fill, .preview, .tp-switch-track, .tp-switch-thumb { transition: none; }
+	}
+</style>