claude.com

DESIGN.md

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

---
version: alpha
name: claude.com
description: "Light product system built on #faf9f5 with #d97757 as the primary CTA accent. Type anchored in anthropicSans at 51.9978px / weight 330. Extracted automatically from https://claude.com/ — every value from getComputedStyle(), no approximation."
narrative: |
  claude.com is built on a warm, off-white canvas (rgb(250, 249, 245)).
  The system uses #d97757 as the accent for primary actions and brand signals.
  Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside anthropicSans as the primary typeface.

colors:
  background: "#faf9f5"
  surface-1: "#ffffff"
  surface-2: "#f0eee6"
  ink: "#141413"
  ink-muted: "rgba(20, 20, 19, 0.65)"
  ink-subtle: "#30302e"
  primary: "#d97757"
  on-primary: "#ffffff"
  primary-hover: "#141413"
  hairline: "#30302e"
  primary-focus: "#2c2c2a"
  semantic-error: "#bf4d43"

typography:
  display-xl:
    fontFamily: "anthropicSerif"
    fontSize: 51.9978px
    fontWeight: 330
    lineHeight: 1.2
    letterSpacing: 0
  display-md:
    fontFamily: "anthropicSerif"
    fontSize: 30px
    fontWeight: 400
    lineHeight: 1.2
    letterSpacing: 0
  body:
    fontFamily: "anthropicSans"
    fontSize: 15px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: 0
  button:
    fontFamily: "anthropicSans"
    fontSize: 17px
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: 0
  mono:
    fontFamily: "anthropicSans"
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.4
    letterSpacing: 0

rounded:
  none: 0px
  xs: 4px
  sm: 8px
  md: 12px
  lg: 16px
  xl: 32px
  pill: 9999px

spacing:
  xxs: 2px
  xs: 16px
  sm: 24px
  md: 32px
  lg: 24px
  xl: 32px
  xxl: 64px
  section: 80px

components:
  button-ghost:
    backgroundColor: "transparent"
    textColor: "{colors.hairline}"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
    padding: 8px 0px
  button-light--invert:
    backgroundColor: "{colors.background}"
    textColor: "#5e5d59"
    typography: "{typography.body}"
    rounded: "{rounded.sm}"
    padding: 8px 12px
  button-dark--solid:
    backgroundColor: "{colors.primary-hover}"
    textColor: "{colors.background}"
    typography: "{typography.body}"
    rounded: "{rounded.sm}"
    padding: 8px 12px
  card-standard-card:
    backgroundColor: "transparent"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
  input-text-input:
    backgroundColor: "transparent"
    textColor: "{colors.background}"
    typography: "{typography.mono}"
    rounded: "{rounded.none}"
    padding: 4px 0px
  navigation-main-nav:
    backgroundColor: "{colors.background}"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
  cta-banner-full-width-cta:
    backgroundColor: "transparent"
    textColor: "{colors.primary-hover}"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
  status-badge-neutral-light:
    backgroundColor: "{colors.on-primary}"
    textColor: "{colors.primary-hover}"
    typography: "{typography.body}"
    rounded: "{rounded.sm}"
  tab-ghost-tab:
    backgroundColor: "transparent"
    textColor: "{colors.primary-hover}"
    typography: "{typography.body}"
    rounded: "{rounded.none}"
  tab-pill-tab:
    backgroundColor: "{colors.surface-2}"
    textColor: "{colors.primary-hover}"
    typography: "{typography.body}"
    rounded: "{rounded.md}"
    padding: 4px

extracted_at: "2026-05-30T20:38:42.077Z"
completeness: 90
scoreVersion: "v2"

---

# Design System — claude.com
> Extracted automatically by Clone Architect from https://claude.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(250, 249, 245)` is the page background. Every component composits against this.
> - **Accent**: `#d97757` 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**: 8px 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

claude.com's canvas is a warm, intentionally-tinted surface (`#faf9f5`) — a refusal of the default white that immediately signals editorial intent. This isn't sterility, it's an invitation to read. 

Typography is anchored in **anthropicSans** with OpenType utility features (`"liga", "lnum", "pnum"`) for data-dense contexts. The weight scale rejects the standard 100/200/.../900 ladder in favor of custom values (max **700** in this system) — a deliberate signal that this design system is precisely tuned, not assembled from defaults. 

Body text reads in Jet Black (`#141413`) — softened from pure black, a small but deliberate detail that lowers reading friction (contrast ratio 12.5:1, well above WCAG AA). **Clay** (`#d97757`) provides interactive distinction without visual aggression. 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. 
Motion design uses smooth easing curves for polished state transitions. The site uses a variable font with OPSZ axes, enabling precise weight/width control across the type hierarchy. 

**Key Characteristics:**
- Background: Off-Cream (`#faf9f5`)
- Primary typeface: anthropicSans
- Primary text: Jet Black (`#141413`)
- Accent: Clay (`#d97757`)
- Display: 51.9978px weight 330
- Shadow system: 6 distinct elevation levels
- Custom fonts loaded: anthropicSans, anthropicSans Fallback, anthropicSerif, anthropicSerif Fallback, anthropicMono, anthropicMono Fallback

## 2. Color Palette & Roles

### Background & Surface
- **Off-Cream** (`#faf9f5`): Page background (primary)
- **Pure White** (`#ffffff`): Surface / elevated background
- **Beige** (`#e8e6dc`): Surface / elevated background
- **Light Gray** (`#f0eee6`): Surface / elevated background

### Text & Content
- **Jet Black** (`#141413`): Primary body text
- **Pure Black** (`#000000`): Secondary text
- **Charcoal** (`#30302e`): Secondary text
- **Warm Brown** (`#262624`): Secondary text
- **Dark Gray** (`#3d3d3a`): Secondary text

### Accent & Interactive
- **Focus** (`#2c84db`): Interactive / accent
- **Clay** (`#d97757`): Interactive / accent
- **Ring Blue** (`#4285f4`): Interactive / accent
- **Success Green** (`#34a853`): Interactive / accent
- **Amber** (`#fbbc05`): Interactive / accent
- **Vermillion** (`#ea4335`): Interactive / accent
- **Terracotta** (`#c6613f`): Interactive / accent

### Border & Divider
- **Silver** (`#d1cfc5`): Borders / dividers

### Full Extracted Palette
37 distinct colors detected on the live page (17 categorized above + 20 additional below). Every value is a real `getComputedStyle()` color — no approximation.

- `#5e5d59` — Dim Gray
- `#4d4c48` — Dark Gray
- `#87867f` — Medium Gray
- `#b0aea5` — Cool Gray
- `#ebcece` — Coral
- `#73726c` — Stone
- `#e3dacc` — Oat
- `#f5f4ed` — Warm Cream
- `#9c9a92` — Cool Gray
- `#bcd1ca` — Cactus
- `#c46849` — Terracotta
- `#6a9bcc` — Sky
- `#c46686` — Fig
- `#c2c0b6` — Silver
- `#1a1918` — Near Black
- `#bf4d43` — Error
- `#1f1e1d` — Near Black
- `#cbcadb` — Heather
- `#dedcd1` — #dedcd1
- `#788c5d` — Olive

### CSS Custom Properties (Design Tokens)

**Spacing Token**
- `--gap-sm`: `24px`
- `--gap-md`: `32px`
- `--gap-xs`: `16px`
- `--section-spacing-md`: `96px`

**Font Weight Token**
- `--font-weight-bold`: `700`
- `--font-weight-regular`: `400`
- `--font-weight-light`: `300`
- `--theme-button-secondary-font-weight`: `500`

**Error / Destructive**
- `--color-error`: `#bf4d43`

**Motion Token**
- `--reveal-duration`: `1s`

**Other tokens**
- `--text-width-wide`: `70ch`
- `--theme-checkbox-bg-selected`: `#000`
- `--color-coral`: `#ebcece`
- `--color-gray-300`: `#d1cfc5`
- `--color-gray-550`: `#73726c`
- `--color-clay-hover`: `#c6613f`
- `--theme-background-primary`: `#faf9f5`
- `--color-gray-1000`: `#000`

## 3. Typography Rules

### Font Families
- **Primary**: `anthropicSans`
- **Secondary**: `anthropicSerif`
- **Font 3**: `anthropicSans Fallback`
- **Font 4**: `anthropicSerif Fallback`
- **Font 5**: `anthropicMono`

### Custom Fonts Loaded
- **anthropicSans** weight normal (normal)
- **anthropicSans Fallback** weight normal (normal)
- **anthropicSerif** weight normal (normal)
- **anthropicSerif Fallback** weight normal (normal)
- **anthropicMono** weight normal (normal)
- **anthropicMono Fallback** weight normal (normal)

### Typography Hierarchy

| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | anthropicSerif | 51.9978px | 330 | 1.2 | normal | Main headline (h1) |
| Sub-heading | anthropicSerif | 30px | 400 | 1.2 | normal | Third-level heading (h3) |
| Button Large | anthropicSans | 17px | 600 | 1.15 | normal | Button label (17px) |
| Card Title | anthropicSans | 15px | 400 | 1.5 | normal | Card headings |
| Input | anthropicSans | 12px | 400 | 1.4 | normal | Form input (12px) |

### Font Weight Scale

CSS custom properties define 9 explicit weight steps:
- `--font-weight-light`: `300` — Light
- `--font-weight-regular`: `400` — Regular
- `--theme-button-primary-font-weight`: `480` — Medium (custom, ~500)
- `--theme-button-secondary-font-weight`: `500` — Medium
- `--theme-button-clay-font-weight`: `500` — Medium
- `--theme-button-tertiary-font-weight`: `500` — Medium
- `--font-weight-medium`: `500` — Medium
- `--font-weight-semibold`: `600` — SemiBold
- `--font-weight-bold`: `700` — Bold

### Full Font Size Scale

Sizes detected in the design (descending): `52.00px`, `30px`, `24px`, `17px`, `16px`, `15px`, `14px`, `12px`, `11px`

> 4 size(s) detected outside the sampled hierarchy (24px, 16px, 14px, 11px). These appear on elements not in the sampled set — likely additional display sizes, marketing-section overrides, or third-party-widget styles.

### OpenType & Variable Font Features

The typography uses these OpenType features intentionally — this is a sophisticated type system, not a default fallback:

- **tabular figures** (`tnum`) — numbers align vertically, essential for pricing tables and dashboards
- **lining figures** (`lnum`) — full-height numbers, more authoritative than old-style
- **ligatures** — common letter pairs replaced with refined glyphs (fi, fl, etc.)

**Clone instruction:** Enable these in your CSS:
```css
body {
  font-feature-settings: "liga", "lnum", "pnum", "tnum";
}
```

**Variable font axes:**
- OPSZ axis

## 4. Component Stylings

### Buttons

**Ghost**
- Background: `transparent`
- Text: `#30302e` `{colors.hairline}`
- Padding: 8px 0px
- Radius: 0px
- Font: 15px weight 400
- Use: Subtle action, toolbar, nav button
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

**Light / Invert**
- Background: `#faf9f5` `{colors.background}`
- Text: `#5e5d59`
- Padding: 8px 12px
- Radius: 8px
- Shadow: `rgb(250, 249, 245) 0px 0px 0px 0px, rgb(209, 207, 197) 0px 0px 0px 1px`
- Font: 15px weight 400
- Use: Bright CTA on dark sections
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

**Dark / Solid**
- Background: `#141413` `{colors.primary-hover}`
- Text: `#faf9f5` `{colors.background}`
- Padding: 8px 12px
- Radius: 8px
- Shadow: `rgb(20, 20, 19) 0px 0px 0px 0px`
- Font: 15px weight 400
- Use: Solid dark CTA
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

**Light / Invert**
- Background: `#faf9f5` `{colors.background}`
- Text: `#141413` `{colors.primary-hover}`
- Padding: 0px 20px
- Radius: 9.6px
- Border: 1px solid rgb(209, 207, 197)
- Font: 17px weight 600
- Use: Bright CTA on dark sections
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

**Ghost**
- Background: `transparent`
- Text: `#141413` `{colors.primary-hover}`
- Padding: 0px 24px
- Radius: 8px
- Font: 14px weight 500
- Use: Subtle action, toolbar, nav button
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

**Dark / Solid**
- Background: `#141413` `{colors.primary-hover}`
- Text: `#faf9f5` `{colors.background}`
- Padding: 8px 16px
- Radius: 8px
- Shadow: `rgb(20, 20, 19) 0px 0px 0px 0px`
- Font: 16px weight 500
- Use: Solid dark CTA
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

**Icon Button**
- Background: `#c6613f`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 4px
- Radius: 8px
- Shadow: `rgb(198, 97, 63) 0px 0px 0px 0px`
- Font: 12px weight 400
- Use: Toolbar/UI icons
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

### Cards & Containers

**Standard Card**
- Background: `transparent`
- Padding: 0px
- Radius: 0px
- Use: Content containers, listing items

### Inputs & Forms

**Text Input**
- Background: `transparent`
- Text: `#faf9f5` `{colors.background}`
- Padding: 4px 0px
- Radius: 0px
- Border: 0px none rgb(250, 249, 245)
- Font: 12px weight 400
- Use: Text fields, search inputs

### Navigation

**Main Nav**
- Background: `#faf9f5` `{colors.background}`
- Padding: 0px
- Radius: none
- Font: 15px weight 400
- Use: Fixed/sticky flex nav — N/A items
- Hover: textDecoration: `underline`

### CTA Banners

**Full-width CTA**
- Background: `transparent`
- Text: `#141413` `{colors.primary-hover}`
- Padding: 0px
- Radius: 0px
- Font: 15px weight 400
- Use: Full-width conversion strip with headline + button
- Hover: color: `#252523`, border: `0px none rgb(37, 37, 35)`, borderColor: `#252523`
- Focus: color: `rgb(44, 44, 42)`, border: `0px none rgb(44, 44, 42)`, borderColor: `rgb(44, 44, 42)`

### Status Badges

**Neutral Light**
- Background: `#ffffff` `{colors.on-primary}`
- Text: `#141413` `{colors.primary-hover}`
- Padding: 0px
- Radius: 8px
- Font: 15px weight 400
- Use: Status indicator, label, pill

### Tabs

**Ghost Tab**
- Background: `transparent`
- Text: `#141413` `{colors.primary-hover}`
- Padding: 0px
- Radius: 0px
- Font: 15px weight 400
- Use: Navigation tabs, filter tabs

**Pill Tab**
- Background: `#f0eee6` `{colors.surface-2}`
- Text: `#141413` `{colors.primary-hover}`
- Padding: 4px
- Radius: 12px
- Font: 15px weight 400
- Use: Navigation tabs, filter tabs


## 4b. Component Behaviors (State Matrix)

### Interaction State Narrative

- **Button**:
  - **hover:** text #30302e → #252523, border changes
  - **focus:** text #30302e → #2c2c2a, border changes

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

```yaml
component-behaviors:
  button:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(48, 48, 46)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(37, 37, 35)"
    focus:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(44, 44, 42)"
  link:
    default:
      bg: "rgb(250, 249, 245)"
      fg: "rgb(20, 20, 19)"
      border: "2px solid rgb(44, 132, 219)"
  card:
    default:
      bg: "rgb(250, 249, 245)"
      fg: "rgb(20, 20, 19)"
      border: "1px solid rgb(209, 207, 197)"
      shadow: "rgba(0, 0, 0, 0.016) 0px 4px 24px 0px, rgba(0, 0, 0, 0.016) "
  navLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(20, 20, 19)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(20, 20, 19)"
  tab:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(20, 20, 19)"
  footerLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(250, 249, 245)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(250, 249, 245)"
```

**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
- **7 shape(s)** in this system: `Ghost`, `Light / Invert`, `Dark / Solid`, `Light / Invert`, `Ghost`
- **DO NOT introduce new buttons variants** without justification

### Cards & Containers
- **1 shape(s)** in this system: `Standard Card`
- **DO NOT introduce new cards & containers 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

### Status Badges
- **1 shape(s)** in this system: `Neutral Light`
- **DO NOT introduce new status badges variants** without justification

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

## 5. Layout Principles

### Layout Type
**hero + sections**

### Grid
Single column, centered content

### Max Width
1440px

### Spacing System
Compact spacing — information density prioritized

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

### Border Radius Scale
| Name | Value | Use |
|------|-------|-----|
| None | 0px | No rounding |
| Xs | 4px | Tiny corners (badges, micro elements) |
| Sm | 8px | Buttons, inputs, small elements |
| Md | 12px | Cards, containers |
| Lg | 16px | Large rounded elements, pill segments |
| Xl | 32px | Category strips, featured containers |
| Full | 9999px | Pills, avatars, circular elements |

### Shape Language

| Component | Border Radius |
|-----------|---------------|
| Buttons | `0px` |
| Cards & Containers | `0px` |
| Inputs & Forms | `0px` |
| Navigation | `none` |
| CTA Banners | `0px` |
| Status Badges | `8px` |
| Tabs | `0px` |
| Page Body | `0px` |
| Primary Input | `0px` |

**Shape Personality**: Moderate Rounding — Medium corners (4–12px). Modern SaaS standard, neither sharp nor pill.

**Full Radius Spectrum**: 4px, 8px, 9.6px, 12px, 16px, 24px, 32px (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** | `32px` | Card padding, list-item spacing |
| **compact** | `24px` | Form fields, tight clusters, badge padding |
| **micro** | `16px` | 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:** "Pensez vite,développez encore plus vite" — 52px center-aligned
- **Subheading:** "Brainstormez dans le chat, construisez dans Cowork"
- **Media:** present, positioned right
- **CTAs:** 4 (primary: "Continuer avec Google")
- **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:** 88px
- **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:** 3 cards detected
- **Columns (desktop):** 3-up grid
- **Card dimensions:** 416×941px (aspect 0.44:1)
- **Gap:** 32px between cards
- **Content:** ✓ image + CTA
- **Image position:** top
- **Clone instruction:** Build a 3-column grid (desktop) with cards at ~0.44:1 aspect ratio. Each card has an image at the top.

### FAQ Pattern

- **Item count:** 3 questions
- **Format:** accordion (expand/collapse)
- **Layout:** single-column
- **Avg question length:** 35 chars
- **Clone instruction:** Build 3 expandable accordion items in a single-column layout.

### Footer Pattern

- **Columns:** 1
- **Links:** 78 total
- **Height:** 1009px
- **Includes:** ✗ no newsletter | ✓ social icons | ✓ language switcher ✓ copyright
- **Clone instruction:** Build a 1-column footer with ~78 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, 0.1) 0px 4px 16px 0px` | Cards, elevated surfaces |
| Layered (Level 2) | <br>`rgb(250, 249, 245) 0px 0px 0px 0px`,<br>`rgb(209, 207, 197) 0px 0px 0px 1px` | Cards, elevated surfaces |
| Layered (Level 3) | <br>`rgb(20, 20, 19) 0px 0px 0px 0px` | Cards, elevated surfaces |
| Layered (Level 4) | <br>`rgba(0, 0, 0, 0.016) 0px 4px 24px 0px`,<br>`rgba(0, 0, 0, 0.016) 0px 4px 32px 0px`,<br>`rgba(0, 0, 0, 0.01) 0px 2px 64px 0px`,<br>`rgba(0, 0, 0, 0.01) 0px 16px 32px 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

### Easing System

| CSS Variable | Curve | Semantic Name |
|--------------|-------|---------------|
| `--ease-in-out-quart` | `cubic-bezier(.77,0,.175,1)` | Ease Out — Decelerating |
| `--ease-out-quart` | `cubic-bezier(.165,.84,.44,1)` | Custom Ease — Balanced |
| `--ease-in-quart` | `cubic-bezier(.895,.03,.685,.22)` | Custom Ease — Balanced |
| `--ease-in-out-expo` | `cubic-bezier(1,0,0,1)` | Expo In-Out — Mechanical Snap |
| `--ease-in-out-power3` | `cubic-bezier(.645,.045,.355,1)` | Ease Out — Decelerating |
| `--ease-out-power2` | `cubic-bezier(.25,1,.5,1)` | Custom Ease — Balanced |

### Duration Scale

| CSS Variable | Value | Tier |
|--------------|-------|------|
| `--reveal-duration` | `1s` | Cinematic |

### Copy-Paste Transition Snippets

**Opacity**
```css
transition: opacity 0.4s ease-in;
```

**Transform**
```css
transition: transform 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
```

**Opacity**
```css
transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
```

**Background**
```css
transition: background-color 0.15s, color 0.2s;
```

### Keyframe Animation Catalog

| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `NavMobile-module-scss-module__twGYTa_...` | Custom | clip-path | UI transition |
| `NavMobile-module-scss-module__twGYTa_...` | Custom | clip-path | UI transition |
| `NavMobile-module-scss-module__twGYTa_...` | Fade + Move | opacity, transform | UI transition |
| `NavBar-module-scss-module__s3E3Dq__na...` | Fade + Move | opacity, transform | Panel / drawer enter |
| `PromptCards-module-scss-module__HcTne...` | Fade + Move | opacity, transform | UI transition |
| `Marquee-module-scss-module__-zurhq__m...` | Slide | transform | UI transition |
| `LetterGrid-module-scss-module__R6_SpW...` | Fade + Move | opacity, transform | Element entrance |
| `TypewriterWord-module-scss-module__sR...` | Fade | opacity | Attention / status |
| `FeatureMediaTabs-module-scss-module__...` | Fade + Move | opacity, transform | UI transition |
| `MediaTabs-module-scss-module__M-mPca_...` | Fade + Move | opacity, transform | UI transition |
| `Pricing-module-scss-module__GLAe0a__c...` | Fade + Move | opacity, transform | UI transition |
| `swipe-out-left` | Fade + Move | transform, opacity | Swipe gesture dismiss |
| `swipe-out-right` | Fade + Move | transform, opacity | Swipe gesture dismiss |
| `swipe-out-up` | Fade + Move | transform, opacity | Swipe gesture dismiss |
| `swipe-out-down` | Fade + Move | transform, opacity | Swipe gesture dismiss |
| `sonner-fade-in` | Fade + Move | opacity, transform | Element entrance |
| `sonner-fade-out` | Fade + Move | opacity, transform | Element exit |
| `sonner-spin` | Fade | opacity | Loading indicator |

### Motion Fingerprint

- **Speed Character**: Deliberate & Calm (median duration: `400ms`)
- **Dominant Easing**: custom cubic-bezier curves
- **Animation Library**: 18 unique animations (18 total including variants)

> This design moves with deliberate & calm timing using custom cubic-bezier curves, creating a UI that feels calm and controlled.

## 8. Do's and Don'ts

### Do
- Use Off-Cream (`#faf9f5`) as the page background — it's intentionally not pure white
- Use Jet Black (`#141413`) for text — not pure black, it's warmer and more readable
- Use anthropicSans as the primary typeface — it defines the brand personality
- Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
- Use Clay (`#d97757`) as the primary accent — it's the brand's signature interactive color
- Use 8px border-radius on buttons — the standard corner rounding for interactive elements
- Maintain nav height at 88px — consistent vertical space for the navigation bar
- 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
- Include exactly 4 CTAs in the hero (primary + secondary) — this design pattern is multi-action, not single-purpose
- Each card includes a top image — imagery is part of the card identity, not optional
- Use a 3-column grid on desktop — density matters for this content type
- Use expandable accordion for the FAQ — saves vertical space and lets users self-navigate

### Don't
- Don't use pure white (`#ffffff`) as a page background — the warm tone is part of the brand identity
- Don't use pure black (`#000000`) for text — the near-black adds warmth
- Don't substitute with generic sans-serif or serif — the custom font carries the brand
- Don't invent new shadow values — use only the extracted shadow levels
- Don't introduce additional saturated accent colors — the palette is intentionally controlled
- Don't collapse or hide the nav on scroll without an explicit scroll-triggered animation — the design uses fixed nav presence
- 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(250, 249, 245)` as the base canvas"
    why: "Every component is designed to composit against this exact tone"
    test: "document.body.style.backgroundColor === 'rgb(250, 249, 245)'"
  - id: brand-accent-001
    type: do
    rule: "Reserve `#d97757` for primary CTAs and brand-mark signals only"
    why: "Single chromatic assertion device — overuse dilutes meaning"
    test: "querySelectorAll('[style*=\"#d97757\"]').length <= 3 per fold"
```

## 9. Responsive Behavior

### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 349px | Single column, compact spacing |
| Mobile Large | 566px | Expanded mobile layout |
| Mobile Large | 600px | Expanded mobile layout |
| Mobile Large | 767px | Expanded mobile layout |
| Tablet | 833px | Multi-column grids begin |
| Tablet | 991px | Multi-column grids begin |

### Token Diff — Desktop vs Mobile

| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| heading | font-size | `51.9978px` | `51px` |
| heading | line-height | `62.3974px` | `61.2px` |
| nav | display | `flex` | `none` |
| nav | height | `88px` | `auto` |
| hero | padding | `104px 0px 0px` | `92px 0px 0px` |
| hero | height | `876px` | `820px` |
| button | width | `145px` | `auto` |
| card | width | `448px` | `321.922px` |

### Collapsing Strategy
- Headlines: 51.9978px → 51px on mobile
- Navigation: flex → none on mobile
- Cards: multi-column → stacked vertical on mobile
- Footer: multi-column → stacked single column on mobile

### Touch Targets
- Buttons: 8px 0px 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.
- **Hero CTAs:** 4 on desktop → 3 on mobile (secondary CTAs dropped on small screens).
- **Card grid: 3-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://cdn.sanity.io/images/4zrzovbb/claude-com/6c36adaaf60ecdde313a93ad255eef573ea4de97-1200x630.jpg?rect=0,2,1200,627&w=1200&h=627&fit=crop (1200×627px)
  *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: 64×64px
- *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): 0 (0%)
- Portrait (<0.87): 0 (0%)
- Square (0.87–1.15): 3 (100%)

**Media Format Mix:**
- SVG: 3 (icons, illustrations, decorative geometry)

**Average rendered image size:** 64×64px
**Above-fold image count:** 0 / 3

**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: Off-Cream (`#faf9f5`)
- Primary text: Jet Black (`#141413`)
- Accent: Clay (`#d97757`)
- Border: Charcoal (`#30302e`)
- Font: anthropicSans
- Body: 15px weight 400

### Example Component Prompts
- "Create a hero section on Off-Cream background (#faf9f5). Headline at 51.9978px anthropicSans weight 330, line-height 1.2, color #141413."
- "Create the primary CTA button: `#d97757` background, `#ffffff` text, 8px border-radius, 4px padding, 600 weight, anthropicSans font."
- "Design a card on `transparent` background. Border: none. Radius: 0px. Shadow: none. Padding: 0px."
- "Build navigation: static on `#faf9f5`. anthropicSans 15px weight 400 for links."

### Iteration Guide
1. **Canvas**: Set the light canvas to Off-Cream (`#faf9f5`) — every component is composited against this exact base.
2. **Typography**: All type in anthropicSans, weight range 300–700. Never exceed 700 — heavier weights break the brand's tonal restraint.
3. **Accent**: Clay (`#d97757`) is the sole interactive color. On hover → Focus (`#2c84db`). Use CSS transitions, not opacity/brightness filters.
4. **Motion**: All transitions use `cubic-bezier(0.165,0.84,0.44,1)`. Timing: 1000ms for micro-interactions, 1000ms for layout changes. Never use linear for UI transitions — preserve the brand's easing personality.
5. **Shape**: CTAs at `0px`, cards at `0px`. Apply border-radius from the extracted scale only — don't invent intermediate values.
6. **Spacing**: Use the `--ca-space-*` token scale (16px–32px). All padding, margin, and gap values are multiples from this scale — no magic numbers.
7. **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-background: #faf9f5;
  --ca-on-primary: #ffffff;
  --ca-surface-2: #f0eee6;
  --ca-primary-hover: #141413;
  --ca-hairline: #30302e;
  --ca-primary: #d97757;
  --ca-primary-focus: #2c2c2a;
  --ca-semantic-error: #bf4d43;
}

/* Typography */
:root {
  --ca-font-primary: "anthropicSerif", system-ui, sans-serif;
  --ca-text-display: 51.9978px;
  --ca-text-body: 15px;
  --ca-text-button: 17px;
  --ca-text-mono: 12px;
}

/* Spacing & Radius */
:root {
  --ca-space-xxs: 2px;
  --ca-space-xs: 16px;
  --ca-space-sm: 24px;
  --ca-space-md: 32px;
  --ca-space-base: 48px;
  --ca-space-lg: 24px;
  --ca-space-xl: 32px;
  --ca-space-2xl: 48px;
  --ca-space-3xl: 64px;
  --ca-radius-none: 0px;
  --ca-radius-xs: 4px;
  --ca-radius-sm: 8px;
  --ca-radius-md: 12px;
  --ca-radius-lg: 16px;
  --ca-radius-xl: 32px;
  --ca-radius-full: 9999px;
}

/* Motion */
:root {
  --ca-ease-in-out-quart: cubic-bezier(.77,0,.175,1);
  --ca-ease-out-quart: cubic-bezier(.165,.84,.44,1);
  --ca-ease-in-quart: cubic-bezier(.895,.03,.685,.22);
  --ca-ease-in-out-expo: cubic-bezier(1,0,0,1);
  --ca-ease-in-out-power3: cubic-bezier(.645,.045,.355,1);
  --ca-ease-out-power2: cubic-bezier(.25,1,.5,1);
}
```


## 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: navigation
    tag: nav
    height: 88px
    width: 710px
    layout: flex-row justify=normal
    children: 6
    padding: "24px 0px"
  - section: header
    tag: header
    classes: ["theme-main"]
    height: 84px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(250, 249, 245)"
  - section: unknown
    tag: div
    height: 2606px
    width: full-bleed
    layout: block
    children: 1
  - section: main-content
    tag: main
    height: 2606px
    width: full-bleed
    layout: block
    children: 6
  - section: hero
    tag: section
    classes: ["theme-main"]
    height: 876px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(250, 249, 245)"
    padding: "104px 0px 0px"
  - section: navigation
    tag: div
    classes: ["container"]
    height: 84px
    width: 1312px
    layout: flex-row justify=space-between
    children: 2
  - section: unknown
    tag: div
    classes: ["container"]
    height: 772px
    width: 1312px
    layout: block
    children: 1
  - section: hero
    tag: div
    height: 724px
    width: 632px
    layout: flex-row justify=center
    children: 1
  - section: hero
    tag: div
    height: 331px
    width: 632px
    layout: flex-row justify=center
    children: 1
  - section: section-7
    tag: section
    classes: ["theme-main"]
    height: 1344px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(250, 249, 245)"
    padding: "128px 0px 64px"
  - section: unknown
    tag: div
    classes: ["container"]
    height: 1152px
    width: 1312px
    layout: block
    children: 4
  - section: section-8
    tag: section
    classes: ["theme-main"]
    height: 386px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(250, 249, 245)"
    padding: "64px 0px 128px"
  - section: unknown
    tag: div
    classes: ["container"]
    height: 194px
    width: 1312px
    layout: block
    children: 2
  - section: footer
    tag: footer
    classes: ["theme-dark"]
    height: 1009px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(20, 20, 19)"
    padding: "95.9999px 0px"
  - section: unknown
    tag: div
    classes: ["container"]
    height: 816px
    width: 1312px
    layout: block
    children: 2
```

**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:
    - "Explorer les formules"
    - "Produits"
    - "Conditions générales et politiques"
  sub-headings:
    - "Free"
  ctas:
    - "Découvrez Claude"
    - "Contacter le service commercial"
    - "Essayer Claude"
    - "Continuer avec Google"
    - "Continuer avec SSO"
    - "Individuel"
    - "Team et Enterprise"
    - "Qu'est-ce que Claude et comment fonctionne-t-il ?"
  navigation:
    - "Connexion"
    - "Contacter le service commercial"
    - "Essayer Claude"
```

**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:
  thumbnail:
    count: 3
    avg-ratio: 1.00
    common-aspect: "~1:1 square"
```

**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">
  Découvrez Claude
</button>
```
_Source pattern detected: padding `8px 0px` · radius `0px` · weight `400`_

### Generic Card
```html
<div class="card">
  <!-- content -->
</div>
```
_Source pattern detected: padding `28px` · radius `32px` · shadow `rgba(0, 0, 0, 0.016) 0px 4px 24px 0px, rgba(0, 0, 0, 0.016) `_

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


## 12. Known Extraction Gaps

*Auto-detected limitations of this extraction — understand before building:*

- **1 parasitic shadow(s) detected** — colored box-shadows (not near-black) found in allShadows. These likely originate from browser extensions or third-party injected widgets (e.g. Grammarly, chat overlays), not from the site's own design system. Discard them when building.


---
## Extraction Completeness: 90/100 (A)

| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 24 | 25 | 17 named colors |
| Typography | 13 | 20 | 5 roles defined |
| Components | 20 | 20 | 7 specs extracted |
| Motion & Interaction | 15 | 15 | Keyframes present, easing vars |
| CSS Custom Properties | 9 | 10 | 186 vars |
| Responsive Breakpoints | 5 | 5 | 6 breakpoints |
| Variable Fonts | 5 | 5 | OPSZ axes |

## 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 | 186 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 5 typography roles inferred |
| §4 Components | High | 7 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 21 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 6 breakpoints detected |
| §9b Photography | High | 3 images, hero present |

---
*Generated by Clone Architect — automated Playwright extraction + design analysis.*
*Source: https://claude.com | 2026-05-30T20:38:42.098Z*
*All values verified via getComputedStyle() — no approximation, no hallucination.*