Imported from anubhavg-icpl/vibe (skills/acd-remix-notion-x-duolingo-design/SKILL.md). Install upstream with npx skills add anubhavg-icpl/vibe --skill acd-remix-notion-x-duolingo-design. Copyright stays with the author (CC-BY-NC-SA-4.0).

Notion × Duolingo — Friendly Education SaaS Design Mode

You are an expert in the Notion × Duolingo — Friendly Education SaaS aesthetic from the awesome-claude-design library. Apply its visual vocabulary, palette, typography, and component patterns when building UI.

Source DESIGN.md

Remix. Notion's warm neutral document surface + Duolingo's saturated greens, rounded corners, and tactile feedback. For learning platforms, courses, and education tools that want to feel like a serious workspace and a friendly tutor at once.

Parent DNA: Notion 55% · Duolingo 45%

1. Visual Theme & Atmosphere

Notion sets the writing surface — warm white, charcoal text, generous reading column, restrained chrome. Duolingo brings encouragement — saturated leaf green for progress and CTAs, rounded geometry, tactile button affordances, streak / XP / progress affordances that gamify without infantilizing.

The result is a study app that feels like a Notion doc you can high-five.

Mood: focused, warm, encouraging.

2. Color Palette & Roles

/* document base from Notion */
--bg:              #ffffff
--bg-alt:          #fbfaf8
--surface:         #f1efea
--text:            #37352f
--text-muted:      #6f6b62
--text-dim:        #a09c92
--border:          #e9e7e2
--border-strong:   #d6d3cc

/* progress + CTA from Duolingo */
--accent:          #58cc02
--accent-hover:    #4cad00
--accent-deep:     #3d8a00
--accent-soft:     #e8f8d8

/* secondary signals from Duolingo */
--streak:          #ff9600
--danger:          #ff4b4b
--xp:              #1cb0f6

/* dark mode — softer than Notion's pitch dark */
--bg-dark:         #25241f
--surface-dark:    #322f29
--text-dark:       #f1efea
--border-dark:     #3e3a32

Arbitration: Notion's warm white wins all reading and document surfaces — Duolingo's white is too cold. Duolingo's leaf green replaces Notion's blue for progress and CTAs. Duolingo's orange / red / blue stay confined to streak, danger, and XP signals — never general UI.

3. Typography Rules

• Display / h1: Inter Display, weight 700, 40px+. Friendlier than Notion's Lyon serif default.
• h2–h4: Inter, weight 600 / 700.
• Body: Inter, weight 400, 16/26. Document-feel, not chat-feel.
• UI labels + buttons + numerals: Inter, weight 600. Never thin weights on CTAs.
• XP / streak / score numerals: Inter, weight 800, tabular.

Scale: Notion's reading ramp + Duolingo's heavier display weights. 12 / 14 / 16 / 18 / 20 / 24 / 32 / 40 / 56.

No serif. Both parents agreed sans wins — Notion's Lyon serif felt too literary for a learning context.

4. Component Stylings

Button (primary CTA)

• Duolingo geometry: radius 16, padding 14/24, weight 700.
• Fill --accent, text #ffffff, weight 700.
• Tactile bottom shadow: 0 4px 0 0 var(--accent-deep). Pressed state shifts to 0 0 0 0 and translateY(2px). Duolingo signature.

Button (secondary)

• Same geometry. Transparent fill, 2px --border-strong, --text color, weight 700.
• Bottom shadow: 0 4px 0 0 var(--border-strong). Same pressed behavior.

Card / lesson tile

• Notion pattern: --bg-alt fill, 1px --border, radius 12.
• Hover: --surface fill, 1px --border-strong. No tactile shadow on cards — only on buttons.

Input

• Notion: 1px --border, radius 8, padding 10/14.
• Focus: 2px --accent ring, 2px offset.

Progress bar

• Track: --surface, height 12, radius 999.
• Fill: --accent, radius 999. Inner highlight rgba(255,255,255,0.32) top 4px.

Streak / XP badge

• Pill, radius 999, padding 6/12, weight 700, mono numeral.
• Streak: --streak fill, white text. XP: --xp fill, white text.

Document surface

• Notion's reading column — 720px, 16px body, 1.6 line-height, callouts in --bg-alt with 1px --border.

5. Layout Principles

Two zones per page.

Reading / lesson content

• Notion: 720px max, centered, 16px body.

Practice / exercise / dashboard

• Duolingo: 480px centered card stack on desktop, full-width on mobile, generous 32px+ padding inside cards.

App shell: 1180px max, 240px nav rail, 8px base scale (8 / 16 / 24 / 32 / 48 / 64 / 96).

6. Depth & Elevation

Two depth modes.

• Document surfaces: flat, border-only. Notion discipline.
• Interactive controls (buttons, exercise tiles): tactile bottom-shadow depth. Duolingo's 0 4px 0 0 move.

Cards stay flat. Modals: 0 20px 48px rgba(55,53,47,0.18). No glass, no blur.

7. Do's and Don'ts

Do

• Reserve tactile bottom-shadow for buttons and exercise tiles only.
• Use leaf green for CTAs and progress, never decoration.
• Keep streak / XP / danger colors confined to their signal contexts.
• Body in Inter 16px, document-style line-height 1.6.

Don't

• Apply tactile shadow to cards — kills the document feel.
• Use Duolingo's owl mascot literally. Borrow the affordances, not the IP.
• Drop multiple categorical colors into general UI.
• Use serif body — broke the learning context.

8. Responsive Behavior

• Reading column padding-only below 768px.
• Practice card stack: full-width with 16px gutter on mobile.
• Nav rail collapses to bottom tab bar at 768px.
• Tactile button shadow scales to 0 3px 0 0 at < 480px.
• Streak / XP badges stay pill-shaped, shrink to 11px font.

9. Agent Prompt Guide

Bias: warm white document base, Inter throughout, leaf green for CTAs and progress only, tactile bottom-shadow on buttons (0 4px 0 0 style), 720px reading column for lessons, 480px card stack for practice, streak / XP / danger colors confined to signal context, rounded radius 12–16 on interactive elements.

Reject: serif body, tactile shadows on cards, mascot illustrations of any kind, multi-color decoration, Notion's cold-white surfaces, button radius < 12, thin font weights on CTAs, glass / blur / drop shadows on cards.

Creative Tensions (documented for team)

• Friendly vs serious. Duolingo can read as childish if pushed too far; Notion can read as cold if held too rigid. Resolution: Notion owns documents, Duolingo owns interactions — never mix on the same surface.
• Tactile button on a Notion card. Tempting and wrong. The tactile move is for things you press / answer / commit. Cards are for reading.
• Color discipline. Duolingo's full palette is loud. Confine to: green for go, orange for streak, red for wrong, blue for XP. Anything else is a regression.

Parent-brand DNA

Tokens traced:

• From Notion: 22 (warm white surface palette, charcoal text ramp, 720px reading column, document callout pattern, 1px border depth, card radius 12, nav-rail shell, dark mode warm-not-pitch, soft border palette, generous reading line-height)
• From Duolingo: 18 (leaf green accent, tactile bottom-shadow buttons, button radius 16, weight 700 CTAs, progress bar pattern, streak / XP / danger signal colors, pill badges, exercise card stack, full-width mobile practice surface)

Net DNA: Notion 55% · Duolingo 45%.

When to Use This Mode

• When user references notion-x-duolingo or the remix family as inspiration
• When building UI in the remix aesthetic
• When applying this brand's color palette, typography, or layout patterns
• When critiquing UI for adherence to this aesthetic