arc.net

DESIGN.md

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

---
version: alpha
name: arc.net
description: "Light product system built on #fffcec with #cf3828 as the primary CTA accent. Type anchored in Marlin at 45.51px / weight 700. Extracted automatically from https://arc.net/ — every value from getComputedStyle(), no approximation."
narrative: |
  arc.net is built on a warm, off-white canvas (rgb(255, 252, 236)).
  The system uses rgb(207, 56, 40) as the high-saturation accent for primary actions.
  Moderately rounded CTAs (10px) — modern SaaS standard, neither sharp nor pill alongside Marlin as the primary typeface.

colors:
  background: "#fffcec"
  surface-1: "#fffcea"
  surface-2: "#ffffff"
  primary: "#cf3828"
  on-primary: "#ffffff"
  primary-hover: "#fa4531"
  hairline: "#696969"
  primary-focus: "#96c4ff"

typography:
  display-xl:
    fontFamily: "Marlin Soft SQ"
    fontSize: 45.51px
    fontWeight: 700
    lineHeight: 0.93
    letterSpacing: -1.8204px
  body:
    fontFamily: "Marlin"
    fontSize: 16px
    fontWeight: 400
    lineHeight: normal
    letterSpacing: 0
  body-sm:
    fontFamily: "ABC Oracle"
    fontSize: 24px
    fontWeight: 400
    lineHeight: 1.2
    letterSpacing: 0
  button:
    fontFamily: "Marlin"
    fontSize: 14px
    fontWeight: 600
    lineHeight: 2.07
    letterSpacing: -0.14px

rounded:
  none: 0px
  xs: 4px
  sm: 8px
  md: 10px
  lg: 22px
  xl: 22px
  xxl: 24px
  pill: 9999px

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

components:
  button-ghost:
    backgroundColor: "transparent"
    textColor: "{colors.on-primary}"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
  button-light--invert:
    backgroundColor: "{colors.on-primary}"
    textColor: "#2702c2"
    typography: "{typography.button}"
    rounded: "{rounded.md}"
    padding: 8px 0px
  button-primary-brand:
    backgroundColor: "#2702c2"
    textColor: "{colors.on-primary}"
    typography: "{typography.button}"
    rounded: "{rounded.md}"
    padding: 8px 0px
  navigation-main-nav:
    backgroundColor: "transparent"
    typography: "{typography.body}"
    rounded: "{rounded.none}"

extracted_at: "2026-05-30T20:38:28.975Z"
completeness: 63
scoreVersion: "v2"

---

# Design System — arc.net
> Extracted automatically by Clone Architect from https://arc.net
> 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, 252, 236)` is the page background. Every component composits against this.
> - **Accent**: `rgb(207, 56, 40)` 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

arc.net's canvas is a warm, intentionally-tinted surface (`#fffcec`) — 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 **Marlin**. Headlines use weight 700 for confident, assertive presence — the brand wants to be heard. Negative letter-spacing at display sizes (-1.8204px at 45.51px) compresses headlines into engineered blocks, dense and precise. 

Body text reads in Pure Black (`#000000`) (contrast ratio 98.5:1, well above WCAG AA). **Vermillion** (`#cf3828`) 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. 
Motion design uses smooth easing curves for polished state transitions. 

**Key Characteristics:**
- Background: Cream (`#fffcec`)
- Primary typeface: Marlin
- Accent: Vermillion (`#cf3828`)
- Display: 45.51px weight 700, letter-spacing -1.8204px
- Shadow system: 2 distinct elevation levels
- Custom fonts loaded: Marlin, Marlin Soft Basic, Inter, InterVariable, Sohne Breit, Space Mono, Sohne Breit Extrafett, EB Garamond, ABC Favorit Mono, Marlin Soft SQ, ABC Oracle, Exposure VAR

## 2. Color Palette & Roles

### Background & Surface
- **Cream** (`#fffcec`): Page background (primary)
- **Cream** (`#fffcea`): Surface / elevated background
- **Pure White** (`#ffffff`): Surface / elevated background
- **Beige** (`#fffadd`): Surface / elevated background

### Text & Content
- **Pure Black** (`#000000`): Primary body text
- **#210784** (`#210784`): Secondary text
- **#26069c** (`#26069c`): Secondary text
- **#2404aa** (`#2404aa`): Secondary text
- **#0034fe** (`#0034fe`): Secondary text

### Accent & Interactive
- **Deep Purple** (`#3139fb`): Interactive / accent
- **#ff9999** (`#ff9999`): Interactive / accent
- **Warm Rose** (`#ff5060`): Interactive / accent

### Full Extracted Palette
53 distinct colors detected on the live page (12 categorized above + 41 additional below). Every value is a real `getComputedStyle()` color — no approximation.

- `#2702c2` — #2702c2
- `#696969` — Dim Gray
- `#cf3828` — Vermillion
- `#96c4ff` — Baby Blue
- `#fa4531` — Vermillion
- `#d7d6c4` — Silver
- `#00c9c3` — #00c9c3
- `#008279` — Teal
- `#d3e081` — #d3e081
- `#fc8279` — Tangerine
- `#090201` — Pure Black
- `#000402` — Pure Black
- `#003828` — #003828
- `#006958` — #006958
- `#f5f4e2` — Beige
- `#1a0402` — Pure Black
- `#f25e6b` — #f25e6b
- `#cdccdf` — Silver
- `#a22b1f` — #a22b1f
- `#002b1f` — Deep Navy
- `#00a39f` — #00a39f
- `#00110c` — Jet Black
- `#0c50ff` — #0c50ff
- `#001e15` — Jet Black
- `#fd6958` — Coral
- `#000354` — #000354
- `#004531` — #004531
- `#e1e0ce` — Beige
- `#00eae7` — #00eae7
- `#766e6a` — Stone
- `#741e15` — #741e15
- `#458aff` — Ring Blue
- *…+9 more in `raw-css.json` (`desktop.allColors`).*

### CSS Custom Properties (Design Tokens)

**Spacing Token**
- `--space-16`: `16px`
- `--space-72`: `72px`
- `--space-4`: `4px`
- `--space-40`: `40px`

**Shadow Token**
- `--shadows-large`: `0 30px 60px rgba(0, 0, 0, 0.12)`
- `--shadows-medium`: `0 8px 30px rgba(0, 0, 0, 0.12)`
- `--shadows-small`: `0 5px 10px rgba(0, 0, 0, 0.12)`

**Other tokens**
- `--fontSizes-20`: `20px`
- `--colors-primary7`: `rgb(207, 56, 40)`
- `--colors-focusOutline`: `#96C4FF`
- `--colors-highContrast`: `#000`
- `--colors-primary6`: `rgb(250, 69, 49)`
- `--colors-students-light_grey-hover`: `rgb(215, 214, 196)`
- `--colors-brandOffwhite`: `#FFFCEC`
- `--colors-brandDeepBlue`: `#2404AA`

## 3. Typography Rules

### Font Families
- **Primary**: `Marlin`
- **Secondary**: `Marlin Soft SQ`
- **Font 3**: `Marlin Soft Basic`
- **Font 4**: `Inter`
- **Font 5**: `InterVariable`

### Custom Fonts Loaded
- **Marlin** weight 800 (normal)
- **Marlin Soft Basic** weight 400 (normal)
- **Inter** weight 400 (normal)
- **Inter** weight 500 (normal)
- **Inter** weight 600 (normal)
- **Inter** weight 700 (normal)
- **InterVariable** weight 100 900 (normal)
- **Sohne Breit** weight 400 (normal)
- **Sohne Breit** weight 700 (normal)
- **Space Mono** weight 700 (normal)
- **Space Mono** weight 400 (normal)
- **Sohne Breit Extrafett** weight 900 (normal)
- **EB Garamond** weight 400 (normal)
- **ABC Favorit Mono** weight 700 (italic)
- **ABC Favorit Mono** weight 500 (normal)
- **ABC Favorit Mono** weight 400 (italic)
- **Marlin Soft SQ** weight 400 (normal)
- **Marlin Soft SQ** weight 500 (normal)
- **Marlin Soft SQ** weight 700 (normal)
- **Marlin Soft SQ** weight 900 (normal)
- **ABC Oracle** weight 350 (normal)
- **ABC Oracle** weight 400 (normal)
- **Exposure VAR** weight 650 (normal)
- **Exposure VAR** weight 700 (normal)
- **Exposure VAR** weight 750 (normal)

### Typography Hierarchy

| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | Marlin Soft SQ | 45.51px | 700 | 0.93 | -1.8204px | Main headline (h1) |
| Link Large | ABC Oracle | 24px | 400 | 1.2 | normal | Link (24px) — Decoration: none |
| Body | Marlin | 16px | 400 | normal | normal | Standard reading text |
| Button | Marlin | 14px | 600 | 2.07 | -0.14px | Button label (14px) |
| Link | Marlin Soft SQ | 14px | 500 | normal | -0.28px | Link (14px) — Decoration: none |
| Button | Marlin | 13.3333px | 400 | normal | normal | Button label (13.3333px) |

### Font Weight Scale

CSS custom properties define 5 explicit weight steps:
- `--fontWeights-400`: `400` — Regular
- `--fontWeights-500`: `500` — Medium
- `--fontWeights-600`: `600` — SemiBold
- `--fontWeights-700`: `700` — Bold
- `--fontWeights-800`: `800` — ExtraBold

### Full Font Size Scale

Sizes detected in the design (descending): `45.51px`, `40px`, `36px`, `32px`, `28px`, `24px`, `20px`, `17px`, `16px`, `14px`, `13.33px`, `13px`, `12px`

> 8 size(s) detected outside the sampled hierarchy (40px, 36px, 32px, 28px, 20px, 17px, 13px, 12px). 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

**Ghost**
- Background: `transparent`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 0px
- Radius: 0px
- Font: 13.3333px weight 400
- Use: Subtle action, toolbar, nav button

**Light / Invert**
- Background: `#ffffff` `{colors.on-primary}`
- Text: `#2702c2`
- Padding: 8px 0px
- Radius: 10px
- Shadow: `rgba(0, 0, 0, 0.1) 0px 5px 5px 0px`
- Font: 14px weight 600
- Use: Bright CTA on dark sections

**Primary Brand**
- Background: `#2702c2`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 8px 0px
- Radius: 10px
- Shadow: `rgba(0, 0, 0, 0.1) 0px 5px 5px 0px`
- Font: 14px weight 600
- Use: Primary CTA / brand action

**Subtle**
- Background: `rgba(0, 0, 0, 0.85)`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 8px 22px 8px 8px
- Radius: 22px
- Shadow: `rgba(0, 0, 0, 0.25) 0px 2px 8px 0px`
- Font: 24px weight 400
- Use: Quiet action against page bg

### Navigation

**Main Nav**
- Background: `transparent`
- Padding: 0px
- Radius: none
- Font: 16px weight 400
- Use: Static flex nav — N/A items
- Hover: transform: `matrix(1.00643, 0, 0, 1.00643, 0, 0)`


## 4b. Component Behaviors (State Matrix)

### Interaction State Narrative

- **Link**:
  - **hover:** transform applied
- **NavLink**:
  - **hover:** transform applied

*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(255, 255, 255)"
  link:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(0, 0, 0)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(0, 0, 0)"
  navLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(0, 0, 0)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(0, 0, 0)"
  footerLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 252, 236)"
```

**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
- **4 shape(s)** in this system: `Ghost`, `Light / Invert`, `Primary Brand`, `Subtle`
- **DO NOT introduce new buttons variants** without justification

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

## 5. Layout Principles

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

### Grid
Single column, centered content

### Max Width
1280px

### 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 | 4px | Tiny corners (badges, micro elements) |
| Sm | 8px | Buttons, inputs, small elements |
| Md | 10px | Cards, containers |
| Lg | 22px | Large rounded elements, pill segments |
| Xl | 22px | Category strips, featured containers |
| Full | 9999px | Pills, avatars, circular elements |

### Shape Language

| Component | Border Radius |
|-----------|---------------|
| Buttons | `0px` |
| Navigation | `none` |
| Page Body | `0px` |

**Shape Personality**: Sharp & Angular — No rounding. Precise, editorial, enterprise feel.

**Full Radius Spectrum**: 4px, 8px, 10px, 22px (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:** centered — Centered composition — heading + subheading + CTAs stacked vertically, content centered horizontally. Common for SaaS marketing pages.
- **Viewport coverage:** full-viewport hero (≥70% screen height)
- **Heading:** "Arc is the Chrome replacement I've been waiting for." — 46px center-aligned
- **Media:** present, positioned top
- **CTAs:** 2 (primary: "Download Arc for Windows")
- **Clone instruction:** Reproduce the **centered** layout. Use the heading font-size token at the documented size. Place media top of text.

### Navigation Pattern

- **Position:** static (scrolls with page)
- **Layout:** unknown — Layout not classified
- **Height:** 36px
- **Logo:** ✓ present
- **Nav links:** 0 primary items
- **CTAs in nav:** 5
- **Clone instruction:** Build a static unknown navigation. Reserve 5 slots for primary CTAs.

### Card Grid Pattern

- **Card count:** 4 cards detected
- **Columns (desktop):** 4-up grid
- **Card dimensions:** 340×202px (aspect 1.68:1)
- **Gap:** 16px between cards
- **Content:** ✗ no image
- **Clone instruction:** Build a 4-column grid (desktop) with cards at ~1.68:1 aspect ratio. Text/icon-only cards (no photography).

### CTA Banner Pattern

- **Banner count:** 1
- **Position:** mid-page
- **Visual treatment:** ✓ contrasting background
- **Primary CTA text:** "Download Arc for Windows"
- **Clone instruction:** Place a single CTA banner mid-page. Use contrasting solid background.

### Footer Pattern

- **Columns:** 1
- **Links:** 18 total
- **Height:** 486px
- **Includes:** ✗ no newsletter | ✓ social icons |  
- **Clone instruction:** Build a 1-column footer with ~18 links per column, social media links.

## 6. Depth & Elevation

| Level | Treatment | Use |
|-------|-----------|-----|
| Flat (Level 0) | No shadow | Page background, content blocks |
| Layered (Level 1) | <br>`rgba(0, 0, 0, 0.25) 0px 2px 8px 0px` | Cards, elevated surfaces |
| Layered (Level 2) | <br>`rgba(0, 0, 0, 0.1) 0px 5px 5px 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` | CSS ease — Default |
| `ease-in-out` | Ease In-Out — Symmetric |
| `ease-in` | Ease In — Accelerating |

### Duration Scale

| Value | Tier | Typical Use |
|-------|------|-------------|
| `100ms` | Fast | Hover states, micro-interactions |
| `150ms` | Fast | Hover states, micro-interactions |
| `200ms` | Normal | Panel open/close, navigation |

### Copy-Paste Transition Snippets

**Transform**
```css
transition: transform 0.15s, background 0.15s;
```

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

**Transform**
```css
transition: transform 0.2s ease-in-out;
```

**Transform**
```css
transition: transform 0.15s, box-shadow 0.15s ease-out;
```

### Keyframe Animation Catalog

| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `scroll` | Slide | transform | UI transition |

### Motion Fingerprint

- **Speed Character**: Balanced Pacing (median duration: `150ms`)
- **Dominant Easing**: custom cubic-bezier curves
- **Animation Library**: 1 unique animation (1 total including variants)

> This design moves with balanced pacing timing using custom cubic-bezier curves, creating a UI that feels natural and fluid.

## 8. Do's and Don'ts

### Do
- Use Cream (`#fffcec`) as the page background — it's intentionally not pure white
- Use Marlin as the primary typeface — it defines the brand personality
- Use negative letter-spacing (-1.8204px) at display sizes for compressed, editorial headlines
- Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
- Use Vermillion (`#cf3828`) as the primary accent — it's the brand's signature interactive color
- Use 10px border-radius on buttons — the standard corner rounding for interactive elements
- 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
- Include exactly 2 CTAs in the hero (primary + secondary) — this design pattern is multi-action, not single-purpose
- Use a 4-column grid on desktop — density matters for this content type

### Don't
- Don't use pure white (`#ffffff`) as a page background — the warm tone is part of the brand identity
- Don't substitute with generic sans-serif or serif — the custom font carries the brand
- Don't increase letter-spacing on headings — the type is designed to run tight at scale
- 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 make the nav sticky — this design lets it scroll away to maximize content focus


## 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, 252, 236)` as the base canvas"
    why: "Every component is designed to composit against this exact tone"
    test: "document.body.style.backgroundColor === 'rgb(255, 252, 236)'"
  - id: brand-accent-001
    type: do
    rule: "Reserve `rgb(207, 56, 40)` for primary CTAs and brand-mark signals only"
    why: "Single chromatic assertion device — overuse dilutes meaning"
    test: "querySelectorAll('[style*=\"rgb(207, 56, 40)\"]').length <= 3 per fold"
```

## 9. Responsive Behavior

### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 340px | Single column, compact spacing |
| Mobile | 400px | Single column, compact spacing |
| Mobile | 480px | Single column, compact spacing |
| Mobile Large | 650px | Expanded mobile layout |
| Mobile Large | 750px | Expanded mobile layout |
| Tablet | 1000px | Multi-column grids begin |

### Token Diff — Desktop vs Mobile

| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| heading | font-size | `45.51px` | `32px` |
| heading | line-height | `42.25px` | `31.2px` |
| heading | letter-spacing | `-1.8204px` | `-1.6px` |
| nav | height | `36px` | `32px` |
| button | width | `auto` | `24px` |
| sidebar | width | `1440px` | `390px` |

### Collapsing Strategy
- Headlines: 45.51px → 32px 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: 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 centered → background-pattern** — composition shifts (verify on actual mobile render).
- **Hero CTAs:** 2 on desktop → 1 on mobile (secondary CTAs dropped on small screens).
- **Nav CTAs reduced** on mobile (5 → 0) — the design prioritizes content over conversion buttons at small sizes.
- **Card grid: 4-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://arc.net/og.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: 1.67:1 (landscape (16:9-ish))
- Rendered size: 1470×882px
- Alt text: "Screenshot of Arc by The Browser Company of New York"
- *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): 5 (83%)
- Portrait (<0.87): 0 (0%)
- Square (0.87–1.15): 1 (17%)

**Media Format Mix:**
- PNG: 2 (logos, transparent UI elements, mockups)

**Average rendered image size:** 1175×753px
**Above-fold image count:** 2 / 6

**Decorative Patterns Detected:**
- **Glassmorphism** detected (`backdrop-filter: blur`) — layered transparent surfaces with blur, modern OS-like aesthetic
- **Noise/grain texture** detected — adds tactile film grain to flat backgrounds

**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: Cream (`#fffcec`)
- Primary text: Pure Black (`#000000`)
- Accent: Vermillion (`#cf3828`)
- Border: Dim Gray (`#696969`)
- Font: Marlin
- Body: 16px weight 400

### Example Component Prompts
- "Create a hero section on Cream background (#fffcec). Headline at 45.51px Marlin weight 700, line-height 0.93, letter-spacing -1.8204px, color #000000."
- "Create the primary CTA button: `#cf3828` background, `#ffffff` text, 10px border-radius, 8px 0px padding, 600 weight, Marlin font."
- "Build navigation: static on `#fffcec`. Marlin 16px weight 400 for links."

### Iteration Guide
1. **Canvas**: Set the light canvas to Cream (`#fffcec`) — every component is composited against this exact base.
2. **Typography**: All type in Marlin, weight range 400–800. Never exceed 800 — heavier weights break the brand's tonal restraint.
3. **Accent**: Vermillion (`#cf3828`) is the sole interactive color. On hover → Vermillion (`#fa4531`). Use CSS transitions, not opacity/brightness filters.
4. **Focus**: Render focus rings in Baby Blue (`#96c4ff`) — never hide focus outlines. The ring color is distinct from the accent to avoid ambiguity.
5. **Shape**: CTAs at `10px`. Apply border-radius from the extracted scale only — don't invent intermediate values.
6. **Spacing**: Use the `--ca-space-*` token scale (4px–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: #fffcec;
  --ca-surface-1: #fffcea;
  --ca-on-primary: #ffffff;
  --ca-primary: #cf3828;
  --ca-primary-hover: #fa4531;
  --ca-hairline: #696969;
  --ca-primary-focus: #96c4ff;
}

/* Typography */
:root {
  --ca-font-primary: "Marlin Soft SQ", system-ui, sans-serif;
  --ca-text-display: 45.51px;
  --ca-text-body: 16px;
  --ca-text-small: 24px;
  --ca-text-button: 14px;
}

/* 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: 4px;
  --ca-radius-sm: 8px;
  --ca-radius-md: 10px;
  --ca-radius-lg: 22px;
  --ca-radius-xl: 22px;
  --ca-radius-full: 9999px;
}
```


## 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: 6019px
    width: full-bleed
    layout: block
    children: 6
  - section: main-content
    tag: main
    height: 5160px
    width: full-bleed
    layout: block
    children: 4
    bg: "rgb(255, 255, 255)"
  - section: section-3
    tag: section
    height: 920px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(49, 57, 251)"
  - section: section-4
    tag: section
    classes: ["c-OBxzD"]
    height: 1080px
    width: full-bleed
    layout: flex-column justify=normal
    children: 3
  - section: section-5
    tag: section
    classes: ["c-OBxzD"]
    height: 1041px
    width: full-bleed
    layout: flex-column justify=normal
    children: 3
  - section: section-6
    tag: section
    classes: ["c-OBxzD"]
    height: 1041px
    width: full-bleed
    layout: flex-column justify=normal
    children: 3
  - section: section-7
    tag: section
    classes: ["c-OBxzD"]
    height: 140px
    width: full-bleed
    layout: flex-column justify=normal
    children: 2
  - section: sidebar
    tag: aside
    classes: ["c-glZFUG-iHvQKn-css"]
    height: 230px
    width: full-bleed
    layout: block
    children: 1
    bg: "rgb(49, 57, 251)"
    padding: "32px 0px 40px"
  - section: footer
    tag: footer
    classes: ["c-fQOTre-iHvQKn-css"]
    height: 486px
    width: full-bleed
    layout: block
    children: 4
    bg: "rgb(49, 57, 251)"
```

**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:
  ctas:
    - "Download Arc for Windows"
    - "Download Arc for Mac"
  navigation:
    - "Max"
    - "Mobile"
    - "Developers"
    - "Students"
    - "Blog"
  footer-links:
    - "Download Arc for Windows"
    - "Download"
```

**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: 1
    avg-ratio: 1.00
    common-aspect: "~1:1 square"
    sample-alts:
      - "Dia Icon"
```

**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">
  Download Arc for Windows
</button>
```
_Source pattern detected: padding `8px 0px` · radius `10px` · weight `600`_

**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:*

- **Sparse component extraction** — fewer than 5 component types detected. Highly dynamic sections (modals, datepickers, carousels) require interaction to render and are not captured in a static pass.


---
## Extraction Completeness: 63/100 (C)

| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 17 | 25 | 12 named colors |
| Typography | 15 | 20 | 6 roles defined |
| Components | 8 | 20 | 2 specs extracted |
| Motion & Interaction | 12 | 15 | Keyframes present |
| CSS Custom Properties | 6 | 10 | 120 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.

| Category | What's missing | Fallback strategy |
|----------|----------------|-------------------|
| **Form inputs** | No text input fields detected on this page | Use the documented border-radius + accent border on focus; 12-16px padding inside |

### Per-section confidence

| Section | Confidence | Reason |
|---------|------------|--------|
| §1 Visual Theme | High | Body bg extracted via getComputedStyle() |
| §2 Colors | High | 120 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 6 typography roles inferred |
| §4 Components | Low | 2 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 16 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 6 breakpoints detected |
| §9b Photography | High | 6 images, hero present |

---
*Generated by Clone Architect — automated Playwright extraction + design analysis.*
*Source: https://arc.net | 2026-05-30T20:38:28.994Z*
*All values verified via getComputedStyle() — no approximation, no hallucination.*