coinbase.com

DESIGN.md

Narrative design system document — paste directly into Claude Code, Cursor, or Bolt.

---
version: alpha
name: coinbase.com
description: "Light product system built on #ffffff with #0052ff as the primary CTA accent. Type anchored in CoinbaseSans at 80px / weight 400. Extracted automatically from https://coinbase.com/ — every value from getComputedStyle(), no approximation."
narrative: |
  coinbase.com is built on a pure-white canvas (rgb(255, 255, 255)).
  The system uses rgb(0,82,255) as the high-saturation accent for primary actions.
  Fully-rounded CTAs (100000px) signal a friendly, tactile interaction model alongside CoinbaseSans as the primary typeface.

colors:
  background: "#ffffff"
  surface-1: "#ffffff"
  surface-2: "rgba(255, 255, 255, 0)"
  ink-subtle: "#5b616e"
  primary: "#0052ff"
  on-primary: "#ffffff"
  primary-hover: "#578bfa"
  hairline: "rgba(91, 97, 110, 0.2)"
  primary-focus: "#ffffff"

typography:
  display-xl:
    fontFamily: "CoinbaseDisplay"
    fontSize: 80px
    fontWeight: 400
    lineHeight: 1
    letterSpacing: 0
  display-md:
    fontFamily: "CoinbaseSans"
    fontSize: 20px
    fontWeight: 600
    lineHeight: 1.4
    letterSpacing: 0
  body:
    fontFamily: "CoinbaseSans"
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.15
    letterSpacing: 0
  body-sm:
    fontFamily: "CoinbaseSans"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.15
    letterSpacing: 0
  caption:
    fontFamily: "CoinbaseText"
    fontSize: 13px
    fontWeight: 600
    lineHeight: 1.23
    letterSpacing: 0
  button:
    fontFamily: "CoinbaseSans"
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: 0

rounded:
  none: 0px
  xs: 12px
  sm: 12px
  md: 12px
  lg: 16px
  xl: 32px
  pill: 100000px

spacing:
  xxs: 2px
  xs: 4px
  sm: 8px
  md: 12px
  lg: 24px
  xl: 32px
  xxl: 64px
  section: 80px

components:
  button-pill:
    backgroundColor: "{colors.surface-2}"
    textColor: "#000000"
    typography: "{typography.body}"
    rounded: "{rounded.xl}"
    padding: 12px 24px
  button-icon-button:
    backgroundColor: "#eef0f3"
    textColor: "{colors.primary-focus}"
    typography: "{typography.body}"
    rounded: "{rounded.xl}"
  button-light--invert:
    backgroundColor: "{colors.primary-focus}"
    textColor: "#000000"
    typography: "{typography.body}"
    rounded: "{rounded.lg}"
  input-text-input:
    backgroundColor: "{colors.surface-2}"
    textColor: "#0a0b0d"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
    padding: 16px 16px 16px 4px
  navigation-main-nav:
    backgroundColor: "{colors.surface-2}"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
  cta-banner-full-width-cta:
    backgroundColor: "#eef0f3"
    textColor: "{colors.primary}"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
    padding: 10px 16px
  tab-pill-tab:
    backgroundColor: "#0a0b0d"
    textColor: "#000000"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
  tab-pill-tab:
    backgroundColor: "#282b31"
    textColor: "#0a0b0d"
    typography: "{typography.body}"
    rounded: "{rounded.xl}"
    padding: 0px 24px

extracted_at: "2026-05-30T20:38:48.001Z"
completeness: 86
scoreVersion: "v2"

---

# Design System — coinbase.com
> Extracted automatically by Clone Architect from https://coinbase.com
> Date: 2026-05-30
> Viewport: Desktop 1440x900 + Mobile 390x844
> Every value in this file comes from real getComputedStyle() — no approximation.

> **🤖 TL;DR for AI agents** (read this first — saves you scanning the full doc):
>
> - **Canvas**: `rgb(255, 255, 255)` is the page background. Every component composits against this.
> - **Accent**: `rgb(0,82,255)` for primary CTAs ONLY. Never decorative.
> - **Body type**: 16px (token: `typography.body`). Default for ALL text not in a heading role.
> - **Section rhythm**: 48px between major bands. Card padding: 24px.
> - **Default radius**: 12px on buttons/inputs. Pills (`9999px`) only for icon-buttons or status chips.
>
> **Before generating UI**: import this DESIGN.md, scan §2 (Color Palette) + §4 (Components) + §10 (Agent Guide). Skip §11–12 unless extending.

## 1. Visual Theme & Atmosphere

coinbase.com adopts the classic pure-white canvas (`#ffffff`) — a deliberate choice that recedes into transparency, letting typography, color and product imagery carry the entire visual weight. 

Typography is anchored in **CoinbaseSans**. Headlines run at a remarkably light weight (400) — restraint over assertion, creating an editorial calm that invites reading rather than demanding it. 

Body text reads in Pure Black (`#000000`) (contrast ratio 100.0:1, well above WCAG AA). **Bgprimary** (`#0052ff`) is the single high-saturation color in the system — it earns its presence only on interactive elements, making CTAs and links the unmistakable focal points against the otherwise neutral palette. Elevation is built from multi-layer shadow stacks — each level combines several blurred layers at varying offsets to simulate the way light actually falls on stacked surfaces, not the simulated drop-shadow of cheap interfaces. 
Border radius varies from pill-shaped (fully rounded) to moderately rounded elements, creating visual rhythm. Motion design uses smooth easing curves for polished state transitions. 

**Key Characteristics:**
- Background: Bglineinverse (`#ffffff`)
- Primary typeface: CoinbaseDisplay
- Accent: Bgprimary (`#0052ff`)
- Display: 80px weight 400
- Shadow system: 1 distinct elevation levels
- Custom fonts loaded: CoinbaseDisplay, CoinbaseSans, CoinbaseText, CoinbaseMono, CoinbaseCondensed

## 2. Color Palette & Roles

### Background & Surface
- **Bglineinverse** (`#ffffff`): Page background (primary)
- **Backgroundalthovered** (`rgba(229, 231, 234, 0.88)`): Surface / elevated background (CSS var)
- **Bgprimarywash** (`#f5f8ff`): Surface / elevated background (CSS var)
- **Bgalternate** (`#eef0f3`): Surface / elevated background (CSS var)
- **Bgtertiarypressed** (`rgba(244, 244, 244, 0.82)`): Surface / elevated background (CSS var)

### Text & Content
- **Pure Black** (`#000000`): Primary body text
- **Fgmuted** (`#5b616e`): Text (CSS var)
- **Accentboldred** (`#cf202f`): Text (CSS var)
- **Bgprimary** (`#0052ff`): Text (CSS var)
- **Bgpositive** (`#098551`): Text (CSS var)

### Accent & Interactive
- **Accentsubtleyellow** (`#fffcf1`): Accent / interactive (CSS var)
- **Accentboldyellow** (`#f7d21a`): Accent / interactive (CSS var)
- **Bgbrandpressed** (`rgba(0, 67, 209, 0.82)`): Accent / interactive (CSS var)
- **Accentsubtlepurple** (`#fbf7ff`): Accent / interactive (CSS var)
- **Accentboldgray** (`#32353d`): Accent / interactive (CSS var)
- **Bgwarning** (`#ed702f`): Accent / interactive (CSS var)
- **Accentboldpurple** (`#5a30ad`): Accent / interactive (CSS var)

### Full Extracted Palette
61 distinct colors detected on the live page (17 categorized above + 44 additional below). Every value is a real `getComputedStyle()` color — no approximation.

- `#0a0b0d` — Bginverse
- `#0667d0` — M Tricolor Blue
- `#141519` — Jet Black
- `#8a919e` — Cool Gray
- `#282b31` — Charcoal
- `#464b55` — Slate
- `#578bfa` — Cornflower Blue
- `#27ad75` — Emerald
- `#f7f8f9` — Bgsecondarywash
- `#808080` — Medium Gray
- `rgba(21, 22, 24, 0.82)` — Bgprimarypressed
- `#f89656` — Tangerine
- `#fff5f6` — Bgnegativewash
- `#936000` — #936000
- `rgba(17, 18, 20, 0.88)` — Bgprimaryhovered
- `#b1b7c3` — Backgroundinversedisabled
- `#001033` — Deep Navy
- `rgba(247, 247, 247, 0.88)` — Bgtertiaryhovered
- `#f0616d` — #f0616d
- `#fffaf5` — Bgwarningwash
- `#e6c9ff` — Soft Pink
- `#ced2db` — Bgtertiary
- `rgba(225, 226, 229, 0.82)` — Backgroundaltpressed
- `rgba(95, 144, 250, 0.88)` — Translucent Cornflower Blue (88%)
- `#330004` — #330004
- `#c1c6cf` — Silver
- `#c79e00` — #c79e00
- `#f5fffb` — Bgpositivewash
- `rgba(31, 32, 35, 0.82)` — Translucent Near Black (82%)
- `#190d33` — Deep Navy
- `#053bb1` — Cobalt Blue
- `rgba(242, 244, 246, 0.82)` — Bgsecondarypressed
- *…+12 more in `raw-css.json` (`desktop.allColors`).*

### CSS Custom Properties (Design Tokens)

**Background**
- `--color-backgroundAltHovered`: `rgba(229, 231, 234, 0.88)`
- `--lightColor-bgPrimaryPressed`: `rgba(21, 22, 24, 0.82)`
- `--lightColor-bg`: `rgb(255,255,255)`
- `--darkColor-bgOverlay`: `rgba(10,11,13,0.33)`

**Spacing Token**
- `--space-7`: `56px`
- `--space-5`: `40px`
- `--space-6`: `48px`
- `--space-4`: `32px`

**Border Radius Token**
- `--borderRadius-700`: `40px`
- `--borderRadius-900`: `56px`
- `--borderRadius-600`: `32px`
- `--borderRadius-300`: `12px`

**Primary Brand Color**
- `--lightColor-accentSubtleRed`: `rgb(255,245,246)`
- `--lightColor-accentBoldYellow`: `rgb(247,210,26)`
- `--darkColor-accentBoldYellow`: `rgb(147,96,0)`
- `--color-accentBoldRed`: `rgb(207,32,47)`

**Shadow Token**
- `--shadow-elevation2`: `0px 8px 24px rgba(0, 0, 0, 0.12)`
- `--shadow-elevation1`: `0px 8px 12px rgba(0, 0, 0, 0.12)`

**Other tokens**
- `--fontSize-display3`: `2.5rem`
- `--fontWeight-headline`: `600`
- `--lightColor-transparent`: `rgba(255,255,255,0)`
- `--darkColor-transparent`: `rgba(10,11,13,0)`
- `--darkColor-fgPrimary`: `rgb(87,139,250)`
- `--darkColor-fgWarning`: `rgb(248,150,86)`
- `--lightColor-fgInverse`: `rgb(255,255,255)`
- `--textTransform-title4`: `none`

## 3. Typography Rules

### Font Families
- **Primary**: `CoinbaseSans`
- **Secondary**: `CoinbaseDisplay`
- **Font 3**: `CoinbaseText`
- **Font 4**: `CoinbaseMono`
- **Font 5**: `CoinbaseCondensed`

### Custom Fonts Loaded
- **CoinbaseDisplay** weight 400 (normal)
- **CoinbaseDisplay** weight 500 800 (normal)
- **CoinbaseSans** weight 400 (normal)
- **CoinbaseSans** weight 500 800 (normal)
- **CoinbaseText** weight 400 (normal)
- **CoinbaseText** weight 500 800 (normal)
- **CoinbaseMono** weight 400 (normal)
- **CoinbaseMono** weight 500 800 (normal)
- **CoinbaseCondensed** weight 400 (normal)
- **CoinbaseCondensed** weight 500 800 (normal)
- **CoinbaseIcons** weight 400 (normal)

### Typography Hierarchy

| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | CoinbaseDisplay | 80px | 400 | 1 | normal | Main headline (h1) |
| Sub-heading | CoinbaseSans | 20px | 600 | 1.4 | normal | Third-level heading (h3) |
| Body | CoinbaseSans | 16px | 400 | 1.15 | normal | Standard reading text |
| Button Large | CoinbaseSans | 16px | 600 | 1.15 | normal | Button label (16px) |
| Link | CoinbaseSans | 14px | 400 | 1.15 | normal | Link (14px) — Decoration: none |
| Caption | CoinbaseText | 13px | 600 | 1.23 | normal | Image caption, helper text |

### Font Weight Scale

CSS custom properties define 13 explicit weight steps:
- `--fontWeight-legal`: `400` — Regular
- `--fontWeight-display1`: `400` — Regular
- `--fontWeight-display2`: `400` — Regular
- `--fontWeight-body`: `400` — Regular
- `--fontWeight-display3`: `400` — Regular
- `--fontWeight-title2`: `400` — Regular
- `--fontWeight-label2`: `400` — Regular
- `--fontWeight-title4`: `400` — Regular
- `--fontWeight-headline`: `600` — SemiBold
- `--fontWeight-title3`: `600` — SemiBold
- `--fontWeight-caption`: `600` — SemiBold
- `--fontWeight-title1`: `600` — SemiBold
- `--fontWeight-label1`: `600` — SemiBold

### Full Font Size Scale

Sizes detected in the design (descending): `80px`, `64px`, `52px`, `44px`, `36px`, `28px`, `24px`, `20px`, `18px`, `16px`, `14px`, `13px`, `9.10px`

> 8 size(s) detected outside the sampled hierarchy (64px, 52px, 44px, 36px, 28px, 24px, 18px, 9.1px). These appear on elements not in the sampled set — likely additional display sizes, marketing-section overrides, or third-party-widget styles.

## 4. Component Stylings

### Buttons

**Pill**
- Background: `transparent` `{colors.surface-2}`
- Text: `#000000`
- Padding: 12px 24px
- Radius: 9999px
- Font: 16px weight 400
- Use: Status pills, tags, chips
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

**Icon Button**
- Background: `#eef0f3`
- Text: `#ffffff` `{colors.primary-focus}`
- Padding: 0px
- Radius: 56px
- Border: 1px solid rgb(238, 240, 243)
- Font: 16px weight 600
- Use: Toolbar/UI icons
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

**Light / Invert**
- Background: `#ffffff` `{colors.primary-focus}`
- Text: `#000000`
- Padding: 0px
- Radius: 16px
- Font: 16px weight 400
- Use: Bright CTA on dark sections
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

**Pill**
- Background: `#eef0f3`
- Text: `#ffffff` `{colors.primary-focus}`
- Padding: 0px 24px
- Radius: 56px
- Border: 1px solid rgb(238, 240, 243)
- Font: 16px weight 600
- Use: Status pills, tags, chips
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

**Icon Button**
- Background: `#0a0b0d`
- Text: `#0a0b0d`
- Padding: 0px
- Radius: 56px
- Border: 1px solid rgb(10, 11, 13)
- Font: 16px weight 600
- Use: Toolbar/UI icons
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

**Light / Invert**
- Background: `#eef0f3`
- Text: `#0052ff` `{colors.primary}`
- Padding: 10px 16px
- Radius: 0px
- Font: 16px weight 400
- Use: Bright CTA on dark sections
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

### Inputs & Forms

**Text Input**
- Background: `transparent` `{colors.surface-2}`
- Text: `#0a0b0d`
- Padding: 16px 16px 16px 4px
- Radius: 0px
- Border: 0px solid rgba(0, 0, 0, 0)
- Font: 16px weight 400
- Use: Text fields, search inputs

### Navigation

**Main Nav**
- Background: `transparent` `{colors.surface-2}`
- Padding: 0px
- Radius: none
- Font: 16px weight 400
- Use: Static flex nav — N/A items

### CTA Banners

**Full-width CTA**
- Background: `#eef0f3`
- Text: `#0052ff` `{colors.primary}`
- Padding: 10px 16px
- Radius: 0px
- Font: 16px weight 400
- Use: Full-width conversion strip with headline + button
- Hover: backgroundColor: `#e5e7ea`, border: `1px solid rgba(229, 231, 234, 0.88)`, borderColor: `#e5e7ea`
- Focus: outline: `rgb(255, 255, 255) none 3px`

### Tabs

**Pill Tab**
- Background: `#0a0b0d`
- Text: `#000000`
- Padding: 0px
- Radius: 0px
- Font: 16px weight 400
- Use: Navigation tabs, filter tabs
- Hover: backgroundColor: `#2f3237`, border: `1px solid rgba(47, 50, 55, 0.88)`, borderColor: `#2f3237`

**Pill Tab**
- Background: `#282b31`
- Text: `#0a0b0d`
- Padding: 0px 24px
- Radius: 56px
- Border: 1px solid rgb(40, 43, 49)
- Font: 16px weight 600
- Use: Navigation tabs, filter tabs
- Hover: backgroundColor: `#2f3237`, border: `1px solid rgba(47, 50, 55, 0.88)`, borderColor: `#2f3237`


## 4b. Component Behaviors (State Matrix)

### Interaction State Narrative

- **Button**:
  - **hover:** bg #eef0f3 → rgba(229, 231, 234, 0.88), border changes
- **Tab**:
  - **hover:** bg #282b31 → rgba(47, 50, 55, 0.88), border changes

*State transitions extracted via Playwright simulation — exact values in the YAML matrix below.*

```yaml
component-behaviors:
  button:
    default:
      bg: "rgb(238, 240, 243)"
      fg: "rgb(255, 255, 255)"
      border: "1px solid rgb(238, 240, 243)"
    hover:
      bg: "rgba(229, 231, 234, 0.88)"
      fg: "rgb(255, 255, 255)"
      border: "1px solid rgba(229, 231, 234, 0.88)"
    focus:
      bg: "rgb(238, 240, 243)"
      fg: "rgb(255, 255, 255)"
      border: "1px solid rgb(238, 240, 243)"
  input:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(10, 11, 13)"
  link:
    default:
      bg: "rgb(238, 240, 243)"
      fg: "rgb(0, 82, 255)"
  navLink:
    default:
      bg: "rgb(238, 240, 243)"
      fg: "rgb(0, 82, 255)"
  tab:
    default:
      bg: "rgb(40, 43, 49)"
      fg: "rgb(10, 11, 13)"
      border: "1px solid rgb(40, 43, 49)"
    hover:
      bg: "rgba(47, 50, 55, 0.88)"
      fg: "rgb(10, 11, 13)"
      border: "1px solid rgba(47, 50, 55, 0.88)"
  footerLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(91, 97, 110)"
```

**Agent usage**: Validate generated components against this matrix. If your output's `:hover` state changes properties not listed here, you are off-brand.


## 4c. Component Vocabulary (Closed System)

*This brand uses ONLY the following component vocabulary. Introducing new variants without justification breaks the system's tonal coherence.*

### Buttons
- **6 shape(s)** in this system: `Pill`, `Icon Button`, `Light / Invert`, `Pill`, `Icon Button`
- **DO NOT introduce new buttons variants** without justification

### Inputs & Forms
- **1 shape(s)** in this system: `Text Input`
- **DO NOT introduce new inputs & forms variants** without justification

### Navigation
- **1 shape(s)** in this system: `Main Nav`
- **DO NOT introduce new navigation variants** without justification

### CTA Banners
- **1 shape(s)** in this system: `Full-width CTA`
- **DO NOT introduce new cta banners variants** without justification

### Tabs
- **2 shape(s)** in this system: `Pill Tab`, `Pill Tab`
- **DO NOT introduce new tabs variants** without justification

## 5. Layout Principles

### Layout Type
**top-nav + content**

### Grid
Single column, centered content

### Max Width
1200px

### Spacing System
Compact spacing — information density prioritized

| Token | Value |
|-------|-------|
| xxs | 2px |
| xs | 4px |
| sm | 8px |
| md | 12px |
| base | 16px |
| lg | 24px |
| xl | 32px |
| 2xl | 48px |
| 3xl | 64px |

### Border Radius Scale
| Name | Value | Use |
|------|-------|-----|
| None | 0px | No rounding |
| Xs | 12px | Tiny corners (badges, micro elements) |
| Sm | 12px | Buttons, inputs, small elements |
| Md | 12px | Cards, containers |
| Lg | 16px | Large rounded elements, pill segments |
| Xl | 32px | Category strips, featured containers |
| Full | 100000px | Pills, avatars, circular elements |

### Shape Language

| Component | Border Radius |
|-----------|---------------|
| Buttons | `9999px` |
| Inputs & Forms | `0px` |
| Navigation | `none` |
| CTA Banners | `0px` |
| Tabs | `0px` |
| Page Body | `0px` |
| Primary Input | `0px` |

**Shape Personality**: Sharp + Pill Contrast — Angular precision with pill-shaped accents (status badges, tags). Creates strong visual hierarchy.

**Full Radius Spectrum**: 12px, 16px, 24px, 32px, 40px, 56px (from `allBorderRadii` scan)


## 5b. Spacing Rhythm Names

*Named spacing tokens with explicit use cases. Use these names in YOUR code instead of raw pixels for consistency.*

| Name | Value | Use case |
|------|-------|----------|
| **hero** | `64px` | Top/bottom of full-bleed hero sections |
| **section** | `32px` | Between major bands (color change, content shift) |
| **subsection** | `24px` | Within a section, between content groups |
| **card** | `12px` | Card padding, list-item spacing |
| **compact** | `8px` | Form fields, tight clusters, badge padding |
| **micro** | `4px` | Icon-text gap, tag inner padding |

**Agent rule**: NEVER hardcode raw pixel values for spacing in generated UI. Always reference these named tokens (`spacing-rhythm.section`, etc.).

## 5c. Widget & Structure Library

Structural patterns extracted from the page DOM — these are the **blueprints** an agent should follow to reproduce the page architecture (not just CSS values).

**5/8 structural patterns detected.**

### Hero Pattern

- **Composition:** split-left-text — Split layout, text-left/media-right — heading + body in left column, image/illustration in right column. Common for product showcases.
- **Viewport coverage:** full-viewport hero (≥70% screen height)
- **Heading:** "L'appli de trading de cryptos la plus fiable" — 80px left-aligned
- **Subheading:** "Rejoignez des millions d'Européen(ne)s qui font confiance à Coinbase pour acheter et vendre leurs cryptos.Simple et rapide. Transférez gratuitement de"
- **Media:** present, positioned right
- **CTAs:** 1 (primary: "S'inscrire")
- **Clone instruction:** Reproduce the **split-left-text** layout. Use the heading font-size token at the documented size. Place media right of text.

### Navigation Pattern

- **Position:** static (scrolls with page)
- **Layout:** unknown — Layout not classified
- **Height:** 44px
- **Logo:** ✓ present
- **Nav links:** 1 primary items
- **CTAs in nav:** 0 (no buttons — links only)
- **Clone instruction:** Build a static unknown navigation. Link-only — no button styling needed.

### Card Grid Pattern

- **Card count:** 5 cards detected
- **Columns (desktop):** 5-up grid
- **Card dimensions:** 262×1064px (aspect 0.25:1)
- **Gap:** 16px between cards
- **Content:** ✗ no image
- **Clone instruction:** Build a 5-column grid (desktop) with cards at ~0.25:1 aspect ratio. Text/icon-only cards (no photography).

### CTA Banner Pattern

- **Banner count:** 13
- **Position:** multiple
- **Visual treatment:** ✓ contrasting background
- **Primary CTA text:** "En savoir plus"
- **Clone instruction:** Place multiple CTA banners across page sections. Use contrasting solid background.

### Footer Pattern

- **Columns:** 1
- **Links:** 81 total
- **Height:** 1398px
- **Includes:** ✗ no newsletter | ✓ social icons |  ✓ copyright
- **Clone instruction:** Build a 1-column footer with ~81 links per column, social media links, and a copyright line.

## 6. Depth & Elevation

| Level | Treatment | Use |
|-------|-----------|-----|
| Flat (Level 0) | No shadow | Page background, content blocks |
| Layered (Level 1) | <br>`rgba(0, 0, 0, 0.12) 0px 8px 12px 0px` | Cards, elevated surfaces |

**Shadow Philosophy**: Multi-layered shadow system creating natural, atmospheric depth. Each shadow level combines multiple layers for realistic elevation.

## 7. Motion & Interaction

### Dominant Easing Curves

| Curve | Semantic Name |
|-------|---------------|
| `ease-in-out` | Ease In-Out — Symmetric |
| `ease-in` | Ease In — Accelerating |
| `ease` | CSS ease — Default |

### Duration Scale

| Value | Tier | Typical Use |
|-------|------|-------------|
| `200ms` | Normal | Panel open/close, navigation |

### Copy-Paste Transition Snippets

**Background**
```css
transition: background-color 0.2s ease-in-out;
```

**All Props**
```css
transition: text-decoration-color 0.2s ease-in-out;
```

**Opacity**
```css
transition: opacity 0.2s ease-in-out;
```

**Shadow**
```css
transition: box-shadow 0.2s ease-in-out;
```

### Keyframe Animation Catalog

| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `onetrust-fade-in` | Fade | opacity | Element entrance |

### Motion Fingerprint

- **Speed Character**: Balanced Pacing (median duration: `200ms`)
- **Dominant Easing**: symmetric in-out (precise)
- **Animation Library**: 1 unique animation (1 total including variants)

> This design moves with balanced pacing timing using symmetric in-out (precise), creating a UI that feels natural and fluid.

## 8. Do's and Don'ts

### Do
- Use CoinbaseSans as the primary typeface — it defines the brand personality
- Keep font weights between 400-600 — the system uses a narrow weight range for subtle hierarchy
- Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
- Use full-pill radius (9999px) only for specific elements (avatars, pills, toggles)
- Use Bgprimary (`#0052ff`) as the primary accent — it's the brand's signature interactive color
- Use 56px border-radius on primary buttons — the brand uses generously-rounded CTAs
- Maintain nav height at 44px — consistent vertical space for the navigation bar
- Transition button background to Translucent Bgsecondaryhovered (88%) (`rgba(229, 231, 234, 0.88)`) on hover — this is the extracted interactive state
- Respect the 4px–32px spacing range — the design uses a wide scale for visual breathing room
- Make the hero full-viewport (≥70% screen height) — this design uses an immersive hero, not a tall navbar
- Build the hero as a split layout with media on the left — text and visual share equal weight
- Use a single primary CTA in the hero — the design intentionally avoids choice paralysis
- Use a 5-column grid on desktop — density matters for this content type
- Repeat the primary CTA across 13 banner sections — conversion paths are layered, not single

### Don't
- Don't substitute with generic sans-serif or serif — the custom font carries the brand
- Don't use weight 700 (bold) or above — 600 is the maximum weight in this system
- Don't invent new shadow values — use only the extracted shadow levels
- Don't apply pill radius on rectangular buttons or cards — it's reserved for specific interactive elements
- Don't introduce additional saturated accent colors — the palette is intentionally controlled
- Don't use sharp-cornered or pill buttons — 56px is the CTA border-radius standard
- Don't collapse or hide the nav on scroll without an explicit scroll-triggered animation — the design uses fixed nav presence
- Don't use opacity or brightness filter for button hover — the design uses an explicit background color change
- Don't make the nav sticky — this design lets it scroll away to maximize content focus
- Don't put a CTA button in the nav — this design uses links only at the top


## 7b. Enforceable Brand Rules

*Structured Do/Don't with reasoning and validation tests. Agents can programmatically verify generated UI.*

```yaml
rules:
  - id: brand-canvas-001
    type: do
    rule: "Always use the page background `rgb(255, 255, 255)` as the base canvas"
    why: "Every component is designed to composit against this exact tone"
    test: "document.body.style.backgroundColor === 'rgb(255, 255, 255)'"
  - id: brand-accent-001
    type: do
    rule: "Reserve `rgb(0,82,255)` for primary CTAs and brand-mark signals only"
    why: "Single chromatic assertion device — overuse dilutes meaning"
    test: "querySelectorAll('[style*=\"rgb(0,82,255)\"]').length <= 3 per fold"
```

## 9. Responsive Behavior

### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 400px | Single column, compact spacing |
| Mobile Large | 500px | Expanded mobile layout |
| Mobile Large | 640px | Expanded mobile layout |
| Mobile Large | 767px | Expanded mobile layout |
| Desktop | 1279px | Full feature layout |
| Large Desktop | 1439px | Maximum content width |

### Token Diff — Desktop vs Mobile

| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| heading | font-size | `80px` | `52px` |
| heading | line-height | `80px` | `52px` |
| button | padding | `12px 24px` | `0px` |
| button | width | `142px` | `44px` |

### Collapsing Strategy
- Headlines: 80px → 52px on mobile
- Navigation: horizontal links → hamburger menu on mobile
- Cards: multi-column → stacked vertical on mobile
- Footer: multi-column → stacked single column on mobile

### Touch Targets
- Buttons: 12px 24px padding
- Navigation: adequate spacing between items
- Interactive elements: minimum 44px touch target recommended

### Collapsing Narrative

How the structural patterns adapt from desktop to mobile (extracted from both viewport extractions):

- **Hero collapses split-left-text → centered** — the side-by-side layout stacks vertically, with media moving above the text.
- **Card grid: 5-up → 1-up** — cards stack as viewport narrows, becoming a vertical list on mobile.

## 9b. Visual Tone & Photography

**Tone:** Mixed photography + illustration

A balanced mix of photographic content and vector graphics. Photos likely carry product/lifestyle context while SVG handles icons, logos, and decorative accents.

**Canonical Brand Image (OG):**
- https://images.ctfassets.net/o10es7wu5gm1/4d4ltl5F5MGyXreHOCtl6e/c4ba702cd30906f2d09339147163f2da/FR.png
  *This is the image shown when the site is shared on social media — represents the brand visual essence.*

**Hero Image (above-fold dominant visual):**
- Aspect: 1:1 (square / portrait)
- Rendered size: 664×664px
- Alt text: "Écran d'accueil de l'application Coinbase sur téléphone"
- *Use this aspect ratio + composition for your clone's hero — mimicking the proportion preserves the visual hierarchy.*

**Aspect Ratio Distribution:**
- Landscape (1.15–2.3): 6 (55%)
- Portrait (<0.87): 0 (0%)
- Square (0.87–1.15): 5 (45%)

**Media Format Mix:**
- JPG: 2 (typically photographic content)
- WebP: 1 (optimized photo/illustration hybrid)
- PNG: 8 (logos, transparent UI elements, mockups)

**Average rendered image size:** 373×314px
**Above-fold image count:** 6 / 11

**Decorative Patterns Detected:**
- 2 multi-stop linear gradients (mesh-like, 3+ color stops) — the brand leans on rich color transitions for visual depth
- **Glassmorphism** detected (`backdrop-filter: blur`) — layered transparent surfaces with blur, modern OS-like aesthetic

**Clone instruction for decorative work:** Glassmorphism is a brand signature — use `backdrop-filter: blur(20px)` on overlapping surfaces.

**Imagery Guidance for clones:**
- Mix photography and illustration intentionally: photos for product/context, vectors for icons + decorative accents.
- Respect the format split — replacing JPGs with illustrations (or vice versa) will shift the brand tone.

## 10. Agent Prompt Guide

### Quick Reference
- Background: Bglineinverse (`#ffffff`)
- Primary text: Pure Black (`#000000`)
- Accent: Bgprimary (`#0052ff`)
- Border: Fgmuted (`rgba(91, 97, 110, 0.2)`)
- Font: CoinbaseSans
- Body: 16px weight 400

### Example Component Prompts
- "Create a hero section on Bglineinverse background (#ffffff). Headline at 80px CoinbaseSans weight 400, line-height 1, color #000000."
- "Create the primary CTA button: `#0052ff` background, `#ffffff` text, 56px border-radius, 0px 24px padding, 600 weight, CoinbaseSans font."
- "Build navigation: static on `#ffffff`. CoinbaseSans 16px weight 400 for links."

### Iteration Guide
1. **Canvas**: Set the light canvas to Bglineinverse (`#ffffff`) — every component is composited against this exact base.
2. **Typography**: All type in CoinbaseSans, weight range 400–600. Never exceed 600 — heavier weights break the brand's tonal restraint.
3. **Accent**: Bgprimary (`#0052ff`) is the sole interactive color. On hover → Cornflower Blue (`#578bfa`). Use CSS transitions, not opacity/brightness filters.
4. **Shape**: CTAs at `9999px`. Apply border-radius from the extracted scale only — don't invent intermediate values.
5. **Spacing**: Use the `--ca-space-*` token scale (4px–32px). All padding, margin, and gap values are multiples from this scale — no magic numbers.
6. **Tokens**: Import from §11 CSS Export (`--ca-*` vars). Never hardcode hex values — always reference a token so theming remains consistent.

## 11. CSS Design Tokens Raw Export

*Copy-paste ready `:root {}` block — all values extracted directly from the live site.*

```css
/* Colors */
:root {
  --ca-primary-focus: #ffffff;
  --ca-surface-2: transparent;
  --ca-hairline: #5b616e;
  --ca-primary: #0052ff;
  --ca-primary-hover: #578bfa;
}

/* Typography */
:root {
  --ca-font-primary: "CoinbaseDisplay", system-ui, sans-serif;
  --ca-text-display: 80px;
  --ca-text-body: 16px;
  --ca-text-small: 14px;
  --ca-text-caption: 13px;
  --ca-text-button: 16px;
}

/* Spacing & Radius */
:root {
  --ca-space-xxs: 2px;
  --ca-space-xs: 4px;
  --ca-space-sm: 8px;
  --ca-space-md: 12px;
  --ca-space-base: 16px;
  --ca-space-lg: 24px;
  --ca-space-xl: 32px;
  --ca-space-2xl: 48px;
  --ca-space-3xl: 64px;
  --ca-radius-none: 0px;
  --ca-radius-xs: 12px;
  --ca-radius-sm: 12px;
  --ca-radius-md: 12px;
  --ca-radius-lg: 16px;
  --ca-radius-xl: 32px;
  --ca-radius-full: 100000px;
}
```


## 13. Page Structure Skeleton

*The actual layout the source site uses. Reproduce these sections in order to match the site structure.*

```yaml
page-skeleton:
  - section: unknown
    tag: div
    height: 7034px
    width: full-bleed
    layout: block
    children: 11
  - section: main-content
    tag: main
    height: 5534px
    width: full-bleed
    layout: block
    children: 8
    bg: "rgb(255, 255, 255)"
  - section: section-3
    tag: section
    classes: ["TrapdoorContentWrapper__Wrapper-sc-599674da-0", "jxswtl"]
    height: 599px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-4
    tag: section
    classes: ["TrapdoorContentWrapper__Wrapper-sc-599674da-0", "jxswtl"]
    height: 320px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-5
    tag: section
    classes: ["TrapdoorContentWrapper__Wrapper-sc-599674da-0", "jxswtl"]
    height: 504px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-6
    tag: section
    classes: ["TrapdoorContentWrapper__Wrapper-sc-599674da-0", "jxswtl"]
    height: 564px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-7
    tag: section
    classes: ["TrapdoorContentWrapper__Wrapper-sc-599674da-0", "jxswtl"]
    height: 352px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-8
    tag: section
    classes: ["LanguageSelectorTrapdoorContentWrapper__Wrapper-sc-12086ef1-0", "jjpApd"]
    height: 380px
    width: full-bleed
    layout: block
    children: 1
    padding: "0px 293px 0px 0px"
  - section: section-9
    tag: section
    height: 803px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-10
    tag: section
    classes: ["bgAlternate-btxvtgs"]
    height: 750px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(20, 21, 25)"
  - section: unknown
    tag: div
    classes: ["cdx-promo-carousel-container"]
    height: 538px
    width: 1312px
    layout: block
    children: 2
  - section: section-12
    tag: section
    classes: ["bgAlternate-btxvtgs"]
    height: 800px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(238, 240, 243)"
  - section: section-13
    tag: section
    height: 596px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-14
    tag: section
    height: 650px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-15
    tag: section
    height: 729px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-16
    tag: section
    height: 924px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-17
    tag: section
    height: 283px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(255, 255, 255)"
  - section: section-18
    tag: section
    height: 1398px
    width: full-bleed
    layout: flex-column justify=normal
    children: 1
    bg: "rgb(238, 240, 243)"
  - section: footer
    tag: footer
    height: 1398px
    width: full-bleed
    layout: block
    children: 1
```

**Agent rule**: rebuild sections in this order (sorted by vertical position). Match the layout primitive (grid N-col / flex direction / block).


## 14. Copy Library (Real Content from Source)

*Actual text content extracted from the live page. Use these strings verbatim when reproducing the site — they carry the brand voice.*

```yaml
copy:
  section-headings:
    - "Un mois avec bien plus"
    - "Gagnez jusqu'à 14 % de contreparties avec vos cryptos."
    - "Découvrez des cryptos telles que le BTC, l'ETH et le DOGE."
    - "Avec Advanced Trade, plus vous tradez, moins vous payez."
    - "Le courtier en cryptos le plus fiable"
  sub-headings:
    - "Découvrir d'autres cryptos"
  ctas:
    - "Particuliers"
    - "󰝊"
    - "Se connecter"
    - "S'inscrire"
    - "󰚖"
    - "En savoir plus"
  navigation:
    - "Passer au contenu"
    - "Passer à l'index du site"
    - "Cryptomonnaies"
    - "Se connecter"
    - "S'inscrire"
  footer-links:
    - "À propos"
    - "Informations légales et confidentialité"
```

**Agent rule**: reuse these exact strings when generating UI. Do NOT translate or rephrase — brand voice is preserved through the original wording.


## 15. Asset Inventory (Image Roles & Ratios)

*Image inventory classified by role and aspect ratio. When reproducing the site, allocate this number of assets per role.*

```yaml
assets:
  product:
    count: 5
    avg-ratio: 1.00
    common-aspect: "~1:1 square"
    sample-alts:
      - "Stylized number \"1\" over a dark background"
  thumbnail:
    count: 14
    avg-ratio: 1.00
    common-aspect: "~1:1 square"
    sample-alts:
      - "Logo Coinbase"
      - "Bitcoin"
      - "Ethereum"
```

**Agent rule**: when generating placeholder images, match these counts and aspect ratios. Use neutral placeholder backgrounds for `product` (e.g. `#f5f5f5`), full-color photography hints for `hero` and `editorial`.


## 16. Component HTML Templates

*Suggested HTML markup for reproducing the key components — based on what was detected in the source DOM.*

### Button (primary action)
```html
<button class="btn btn-primary">
  Particuliers
</button>
```
_Source pattern detected: padding `12px 24px` · radius `100000px` · weight `400`_

**Agent rule**: use these markup skeletons as the structural baseline. Apply tokens from §2-3 for visual styling.


---
## Extraction Completeness: 86/100 (B)

| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 24 | 25 | 17 named colors |
| Typography | 15 | 20 | 6 roles defined |
| Components | 20 | 20 | 5 specs extracted |
| Motion & Interaction | 12 | 15 | Keyframes present |
| CSS Custom Properties | 10 | 10 | 823 vars |
| Responsive Breakpoints | 5 | 5 | 6 breakpoints |
| Variable Fonts | 0 | 5 | None detected |

## 12. Known Gaps & Confidence

Explicit list of what this extraction could NOT capture. Agents should not invent values for these — either skip the feature or use the documented baseline + heuristic fallback.

*✅ No critical extraction gaps detected — high-confidence reproduction expected.*

### Per-section confidence

| Section | Confidence | Reason |
|---------|------------|--------|
| §1 Visual Theme | High | Body bg extracted via getComputedStyle() |
| §2 Colors | High | 823 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 6 typography roles inferred |
| §4 Components | High | 5 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 24 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 6 breakpoints detected |
| §9b Photography | High | 11 images, hero present |

---
*Generated by Clone Architect — automated Playwright extraction + design analysis.*
*Source: https://coinbase.com | 2026-05-30T20:38:48.114Z*
*All values verified via getComputedStyle() — no approximation, no hallucination.*