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# Build brief — an original call to action section in the taste of Duolingo
> Reference: [screenshot](https://uidiscovery.com/media/captures/duolingo/ps-03-02.webp) (2880×628, 1440px viewport @2x) · UIDiscovery: https://uidiscovery.com/sections/duolingo-p03-02 · source https://www.duolingo.com
## Goal
Build an original call to action section for **[the user's brand]**. Its job: close the page with one clear next step.
## Originality rules
- Never reuse Duolingo's logo, name, product imagery, illustrations, icons, screenshots or copy. Write new copy for the user's product.
- If the user hasn't said what their product is, ask first (or use clearly marked placeholders like [Brand], [Product], [Audience]).
## Layout
- Pattern: short headline + one primary action on a contrasting band. Compact band (314px at 1440), page background; no images (type-led); one primary button.
- Content slots: Headline (~7 words, like the reference); One sentence of support; One primary action.
- Reference headline (tone/length only — never reuse): “language learning they’ll love with super duolingo”
- Responsive: stack columns below 768px keeping the order heading → body → action → visual; test at 390 / 768 / 1440px.
## Design tokens
- Colour: section background `#ffffff`, text `#100f3e` (18.1:1), accent `#58cc02` (2.1:1), surface `#ddf4ff`, muted `#777777`. Keep the mood; swap the accent for the user's brand colour.
- Type: headings **Inter** (stand-in for Duolingo sans), body **Inter** (stand-in for system sans-serif).
- Shape: Radii and shadows weren't measured. Read exact corner radius, border and shadow treatment from the screenshots.
- Full tokens (CSS/Tailwind): https://uidiscovery.com/api/v1/sites/duolingo/tokens?format=tailwind
## Imagery
Best guess: mostly **typography with little or no imagery** (light, natural, earthy, Education). Inferred from element counts, colours and industry — not from the pixels — so open the linked screenshots and match the real style before sourcing anything.
### Slot 1 · Call to action → no imagery (type-led)
- No <img> elements captured. Any background graphic is CSS, canvas or video — check the screenshot. Count: 1. Aspect: 21:9 (background). Look first: [ref 1](https://uidiscovery.com/media/captures/duolingo/ps-03-02.webp)
- No imagery needed — type, spacing and colour do the work. If the screenshot shows a background graphic, rebuild it in CSS (gradient, grid, noise) or a short muted video, not a stock photo.
### If the screenshots show a different style
Open the refs first and name what you actually see (photo / product UI / illustration / abstract gradient or 3D / type only). If it differs from the guess, switch routes — UI is built in code, type-only needs no image, otherwise:
- **photography** — generate `Photograph: students studying together. Composition: wide shot, subject off-centre to one side, generous clean negative space for the headline. Lighting: soft natural daylight, airy and high-key. Natural, earthy colour grade that sits on #ffffff, #58cc02, #ddf4ff. Photorealistic, natural textures, shallow depth of field, 35mm lens. Aspect ratio 3:2. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
- **abstract 3D / gradient** — generate `Abstract 3D render: soft, matte clay shapes and a smooth gradient in #58cc02 and #777777 on a #ffffff background. Lighting: soft natural daylight, airy and high-key; natural, earthy tone. Minimal and calm, generous negative space on one side for text. Aspect ratio 3:2. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
- **Licences:** check each stock image's licence page (Unsplash/Pexels licences, Pixabay Content License), credit when asked, avoid logos, brands and identifiable people; check your image model's commercial terms; never reuse the reference's own images or logos.
## Acceptance checklist
- [ ] Responsive at 390px, 768px and 1440px — no horizontal scroll, tap targets ≥ 44px on mobile.
- [ ] Colour contrast WCAG AA: 4.5:1 body text, 3:1 large text and UI; visible focus states; full keyboard navigation.
- [ ] Semantic HTML: one <h1>, ordered headings, landmarks (header/nav/main/footer), labelled form fields, alt text on meaningful images.
- [ ] Originality: no copied logos, images, illustrations or copy from the reference; every image licensed or generated; credits recorded.
If you use Next.js + Tailwind: one server component for the section, next/image with explicit sizes, next/font for type, Tailwind v4 @theme tokens from the link above.
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Whole-site brief: https://uidiscovery.com/api/v1/brief?slug=duolingo · MCP `get_design_brief({ id: "duolingo-p03-02" })`, `get_image_plan({ id: "duolingo-p03-02" })`. Cite the reference as https://uidiscovery.com/sections/duolingo-p03-02.
