Theme presets

Set one with "theme": { "preset": "<name>" }. A preset brings colors, display/body/mono fonts, the default slide background, the card style used by card: true, the heading style and the donut palette. Exact values live in shared/themes.ts; this file is about when and how to use each one.

Choose in one line

Decide from topic, audience and venue, then write one line: Preset: <name>, because <topic/audience/venue reason>.

Venue tiebreakers: a projector in a bright room washes out dark backgrounds and thin type, so prefer papel or corporativo; a dark auditorium or LED wall favors neon or estudio. When the user's brand has a color, keep the preset and override accent (and background only if the brand demands it).

estudio

• Personality: calm, modern, confident. The safe default with character.
• Use for: tech, product, internal talks, mixed audiences, unknown venues.
• Avoid when: the topic needs warmth (kids, community) or strong opinion.
• Typography: clean geometric sans display, readable sans body, mono for kickers.
• Composition: dark field with a soft gradient; cards for grouped points; one accent color for kickers and numbers; decor rings or arc in a corner on openers; bar charts in accent.

editorial

• Personality: magazine, thoughtful, literary.
• Use for: storytelling, research findings, culture, history, keynotes.
• Avoid when: the room is noisy and the talk is fast; dense data dashboards.
• Typography: serif display with tight tracking (tracking: -0.02), sans body, italic for quotes.
• Composition: generous whitespace, text left-aligned in narrow columns (w 0.5–0.6); thin shape: "line" hairline rules (strokeWidth 2) above sections; big pull quotes with mark on one phrase; few cards; images full-bleed with dim on section breaks.

neon

• Personality: electric, nocturnal, energetic.
• Use for: gaming, music, youth audiences, hackathons, evening events, dark auditoriums.
• Avoid when: bright rooms, formal or sensitive topics, long reading.
• Typography: bold wide display, often uppercase with open tracking (0.05–0.1) on short labels.
• Composition: near-black background with glowing accent; pattern: "grid" on section breaks; big numbers in accent; decor star or squiggle at low opacity (0.2–0.4); short text only.

papel

• Personality: warm, handmade, friendly.
• Use for: schools, workshops, community and NGO talks, families, bright rooms.
• Avoid when: the audience expects corporate polish or the room is very dark.
• Typography: rounded or humanist display, relaxed line height (1.3+), sentence case.
• Composition: light paper background with pattern: "noise" or "dots"; card: true notes; icon rows with labels; decor blob or squiggle in accent; donut charts read well here.

brutalista

• Personality: raw, loud, opinionated.
• Use for: design talks, manifestos, pitches, contrarian opinions, short punchy decks.
• Avoid when: sensitive topics, older or formal audiences, long explanations.
• Typography: heavy display in uppercase, tight tracking (-0.02 to 0) at big sizes; mono for labels.
• Composition: thick-bordered cards (card: true), hard shadows, flat colors, yellow mark highlight on the key phrase, decor grid or star; asymmetric boxes are fine as long as alignment is deliberate.

corporativo

• Personality: clear, trustworthy, restrained.
• Use for: business reviews, public sector, finance, clients, bright projector rooms.
• Avoid when: the goal is to entertain or provoke.
• Typography: neutral sans display, medium weights (700 headings), no uppercase body.
• Composition: light background, accent used sparingly; charts and big-number cards carry the content; icon rows for processes; at most one decor (arc or dots) at low opacity on the opener and closing.

Rules for every preset

• Do not hand-set background/radius on text cards; use card: true so the preset decides.
• Do not mix presets' looks: one accent, one display font, one card style per deck.
• Contrast first: text over images needs dim >= 0.4; small text never sits on decor.