---
version: alpha
name: github.com
description: "Light product system built on #ffffff with #1f883d as the primary CTA accent. Type anchored in Mona Sans VF at 32px / weight 600. Extracted automatically from https://github.com/ — rendered styles via getComputedStyle() + CSS custom properties (token-only values may not be painted)."
narrative: |
  github.com is built on a pure-white canvas (rgb(255, 255, 255)).
  The system uses rgb(31, 136, 61) as the accent for primary actions and brand signals.
  Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside Mona Sans VF as the primary typeface.
  A layered elevation system (7 distinct shadows) building a clear front-to-back hierarchy.
  Motion is a first-class concern — 54 keyframe animations plus transition-driven interactions.

colors:
  background: "#ffffff"
  surface-1: "rgba(255, 255, 255, 0)"
  surface-2: "rgba(228, 235, 230, 0.996)"
  ink: "#1f2328"
  ink-subtle: "#58635b"
  primary: "#1f883d"
  on-primary: "#ffffff"
  primary-hover: "#1f2328"
  hairline: "#25292e"
  primary-focus: "#0969da"
  semantic-error: "#d1242f"
  semantic-success: "#1a7f37"
  semantic-warning: "#9a6700"

typography:
  display-xl:
    fontFamily: "Mona Sans VF"
    fontSize: 32px
    fontWeight: 600
    lineHeight: 1.5
    letterSpacing: 0
  display-md:
    fontFamily: "Mona Sans VF"
    fontSize: 24px
    fontWeight: 600
    lineHeight: 1.5
    letterSpacing: 0
  headline:
    fontFamily: "Mona Sans VF"
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.5
    letterSpacing: 0
  body:
    fontFamily: "Mona Sans"
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: 0
  body-sm:
    fontFamily: "Mona Sans"
    fontSize: 16px
    fontWeight: 500
    lineHeight: 1.5
    letterSpacing: 0
  caption:
    fontFamily: "Mona Sans"
    fontSize: 12px
    fontWeight: 500
    lineHeight: 0px
    letterSpacing: 0
  button:
    fontFamily: "Mona Sans VF"
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: 0
  eyebrow:
    fontFamily: "Mona Sans"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: 0

rounded:
  none: 0px
  xs: 3px
  sm: 6px
  md: 12px
  lg: 12px
  xl: 12px
  xxl: 24px
  pill: 9999px

spacing:
  xxs: 2px
  xs: 6px
  sm: 16px
  md: 40px
  lg: 24px
  xl: 32px
  xxl: 64px
  section: 80px

components:
  button-light--invert:
    backgroundColor: "#efefef"
    textColor: "#000000"
    typography: "{typography.headline}"
    rounded: "{rounded.none}"
    padding: 1px 6px
  button-ghost:
    backgroundColor: "{colors.surface-1}"
    textColor: "{colors.on-primary}"
    typography: "{typography.headline}"
    rounded: "{rounded.none}"
    padding: 8px
  button-ghost:
    backgroundColor: "{colors.surface-1}"
    textColor: "{colors.on-primary}"
    typography: "{typography.eyebrow}"
    rounded: "{rounded.sm}"
    padding: 0px 0px 0px 8px
  input-text-input:
    backgroundColor: "{colors.surface-1}"
    textColor: "{colors.surface-1}"
    typography: "{typography.eyebrow}"
    rounded: "{rounded.sm}"
  navigation-main-nav:
    backgroundColor: "{colors.hairline}"
    typography: "{typography.headline}"
    rounded: "{rounded.none}"
    padding: 16px 0px

extracted_at: "2026-05-30T21:32:12.271Z"
completeness: 88
scoreVersion: "v2"

---

# Design System — github.com
> Extracted automatically by Clone Architect from https://github.com/paulsainton/lifeos-app.git
> Date: 2026-05-30
> Viewport: Desktop 1440x900 + Mobile 390x844
> Values are extracted, not hand-written: rendered styles via getComputedStyle() + colors declared in CSS custom properties (token-only values are marked `(token)` and may not be painted).

> **🤖 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(31, 136, 61)` for primary CTAs ONLY. Never decorative.
> - **Body type**: 14px (token: `typography.body`). Default for ALL text not in a heading role.
> - **Section rhythm**: 48px between major bands. Card padding: 24px.
> - **Default radius**: 6px 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

github.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 **Mona Sans VF**. The weight scale rejects the standard 100/200/.../900 ladder in favor of custom values (max **460** in this system) — a deliberate signal that this design system is precisely tuned, not assembled from defaults. 

Body text reads in Warm Brown (`#1f2328`) — softened from pure black, a small but deliberate detail that lowers reading friction. **Forest Green** (`#1f883d`) 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. The site uses a variable font with ITAL axes, enabling precise weight/width control across the type hierarchy. 

**Key Characteristics:**
- Background: Text White (`#ffffff`)
- Primary typeface: Mona Sans
- Primary text: Warm Brown (`#1f2328`)
- Accent: Forest Green (`#1f883d`)
- Shadow system: 7 distinct elevation levels
- Custom fonts loaded: Mona Sans, MonaSansFallback, MonaSansHeaderFallback, Hubot Sans, Mona Sans Mono, Mona Sans Fallback, Mona Sans Header Fallback

## 2. Color Palette & Roles

### Background & Surface
- **Text White** (`#ffffff`): Page background (primary)
- **Transparent** (`transparent`): Surface / elevated background
- **Ghost White** (`#f6f8fa`): Surface / elevated background
- **Light Gray** (`#efefef`): Surface / elevated background

### Text & Content
- **Warm Brown** (`#1f2328`): Primary body text
- **Warm Brown** (`#25292e`): Secondary text

### Accent & Interactive
- **Brand Label Color Green Blue Start** (`#08872b`): Accent / interactive (CSS var)
- **Brand Testimonial QuoteMarkBackground Teal** (`#daf9f5`): Accent / interactive (CSS var)
- **Brand Color Text Muted** (`#58635b`): Accent / interactive (CSS var)
- **Brand Pagination Link BgColor Rest** (`#000000`): Accent / interactive (CSS var)
- **Brand SubNav Color Link BgColor** (`#e4ebe6`): Accent / interactive (CSS var)
- **Brand Icon Color Coral** (`#e13f1b`): Accent / interactive (CSS var)
- **Brand IDE PlayPauseControl Rest** (`#d2d9d4`): Accent / interactive (CSS var)

### Border & Divider
- **#d1d9e0** (`#d1d9e0`): Borders / dividers
- **Translucent Light Blue (40%)** (`rgba(200, 209, 218, 0.4)`): Borders / dividers

### Full Extracted Palette
**20 colors rendered on the page** + **365** more declared in design tokens (CSS custom properties — not necessarily painted). (15 categorized above + 370 additional below.)
Rendered values are read via `getComputedStyle()`; token values come from CSS variable declarations. Third-party logo colors are filtered out.

- `#0969da` — M Tricolor Blue
- `#0377ff` — #0377ff
- `#818b98` — Medium Gray
- `#59636e` — Dim Gray
- `#979a9c` — Cool Gray
- `#1f883d` — Forest Green
- `#d1242f` — Crimson
- `rgba(212, 167, 44, 0.4)` — Translucent #d4a72c (40%)
- `#9a6700` — #9a6700
- `rgba(255, 129, 130, 0.4)` — Translucent #ff8182 (40%)
- `#b6e3ff` — Light Blue *(token)*
- `#64513a` — #64513a *(token)*
- `#ce2c85` — Cherry *(token)*
- `#0a4852` — #0a4852 *(token)*
- `#b88700` — #b88700 *(token)*
- `#e3f2b5` — Vibrant Yellow *(token)*
- `#e6eaef` — Light Gray *(token)*
- `#fecfaa` — Pink *(token)*
- `#c7f5ef` — #c7f5ef *(token)*
- `#052b2c` — Navy Blue *(token)*
- `#007b94` — #007b94 *(token)*
- `#e6d6d5` — Soft Pink *(token)*
- `#0757ba` — Cobalt Blue *(token)*
- `#004db3` — Cobalt Blue *(token)*
- `#b8500f` — #b8500f *(token)*
- `#495a2b` — #495a2b *(token)*
- `#ffe5db` — Beige *(token)*
- `#422b00` — #422b00 *(token)*
- `#f68c41` — Coral *(token)*
- `#23b1ae` — #23b1ae *(token)*
- `#a98906` — #a98906 *(token)*
- `#1a7f37` — Forest Green *(token)*
- *…+338 more in `raw-css.json` (`desktop.allColors`).*

### CSS Custom Properties (Design Tokens)

**Shadow Token**
- `--button-danger-shadow-selected`: `inset 0 1px 0 0 #4c001433`
- `--brand-CTABanner-shadow-color-start`: `#08872b`
- `--color-mktg-btn-shadow-focus`: `#00000026 0 0 0 4px`
- `--sub-nav-mktg-shadow`: `0 0 0 1px #35485b24, 0 3px 2px #0000000a, 0 7px 7px #00000008`

**Motion Token**
- `--brand-animation-variant-scaleInLeft-end`: `1`
- `--base-duration-600`: `.6s`
- `--brand-animation-variant-scaleInRight-distance`: `-1.25rem`

**Secondary Color**
- `--display-lime-bgColor-muted`: `#e3f2b5`
- `--data-coral-color-muted`: `#ffe5db`
- `--display-plum-borderColor-muted`: `#f0cdfe`
- `--display-cyan-borderColor-muted`: `#7ae9ff`

**Spacing Token**
- `--control-medium-gap`: `.5rem`
- `--brand-RiverBreakout-variant-gridline-spacing-outerBlock`: `4rem`
- `--brand-RiverAccordion-variant-gridline-spacing-outerInline`: `4rem`
- `--Layout-outer-spacing-x`: `0px`

**Success**
- `--brand-Label-color-green-blue-start`: `#08872b`
- `--brand-Eyebrowbanner-fgColor-green-blue-end`: `#0377ff`
- `--fgColor-success`: `#1a7f37`
- `--bgColor-success-emphasis`: `#1f883d`

**Text Color**
- `--brand-color-text-muted`: `#58635b`
- `--brand-color-text-emphasized`: `#08872b`
- `--brand-color-text-onEmphasis`: `#fff`
- `--color-text-white`: `#fff`

**Border**
- `--header-borderColor-divider`: `#818b98`
- `--brand-color-border-subtle`: `#d2d9d4`
- `--brand-color-border-muted`: `#e4ebe6`
- `--brand-color-border-default`: `#b6bfb8`

**Border Radius Token**
- `--brand-borderRadius-small`: `.25rem`
- `--brand-VideoPlayer-range-borderRadius`: `.1875rem`
- `--brand-Bento-item-borderRadius-large`: `1.5rem`
- `--borderRadius-medium`: `.375rem`

**Warning**
- `--brand-Label-color-yellow`: `#be7d00`
- `--brand-Testimonial-quoteMarkColor-yellow`: `#be7d00`
- `--brand-Eyebrowbanner-fgColor-yellow`: `#be7d00`
- `--brand-Accordion-toggle-color-yellow`: `#be7d00`

**Error / Destructive**
- `--brand-Label-color-red-orange-end`: `#b85b06`
- `--brand-Accordion-toggle-color-red`: `#cf2230`
- `--brand-Testimonial-quoteMarkColor-red-orange-start`: `#cf2230`
- `--brand-Pillar-icon-color-red`: `#cf2230`

**Primary Brand Color**
- `--borderColor-accent-muted`: `#54aeff66`
- `--brand-color-accent-primary`: `#0d6731`
- `--fgColor-accent`: `#0969da`
- `--brand-Token-fgColor-accent`: `#fff`

**Font Size Token**
- `--font-size-small`: `.75rem`
- `--body-font-size`: `.875rem`

**Background**
- `--brand-color-canvas-invert`: `#000`
- `--brand-color-canvas-inset`: `#f2f5f3`
- `--brand-color-canvas-overlay`: `#fff`
- `--brand-color-canvas-muted`: `#fafafa`

**Other tokens**
- `--label-blue-borderColor`: `#fff0`
- `--diffBlob-hunkNum-bgColor-rest`: `#b6e3ff`
- `--label-brown-fgColor-hover`: `#64513a`
- `--label-teal-fgColor-active`: `#0a4852`
- `--button-primary-iconColor-disabled`: `#fffc`
- `--button-outline-fgColor-disabled`: `#0969da80`
- `--data-yellow-color-emphasis`: `#b88700`
- `--brand-text-weight-300`: `400`

## 3. Typography Rules

### Font Families
- **Primary**: `Mona Sans VF`
- **Secondary**: `Noto Sans`
- **Font 3**: `Mona Sans`
- **Font 4**: `MonaSansFallback`
- **Font 5**: `MonaSansHeaderFallback`

### Custom Fonts Loaded
- **Noto Sans** weight normal (normal)
- **Mona Sans** weight 200 900 (normal)
- **MonaSansFallback** weight normal (normal)
- **MonaSansHeaderFallback** weight normal (normal)
- **Hubot Sans** weight 200 900 (normal)
- **Mona Sans Mono** weight 200 900 (normal)
- **Mona Sans Fallback** weight normal (normal)
- **Mona Sans Header Fallback** weight normal (normal)

### Typography Hierarchy

| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | Mona Sans VF | 32px | 600 | 1.5 | normal | Main headline (h1) |
| Sub-heading | Mona Sans VF | 24px | 600 | 1.5 | normal | Section titles (h2) |
| Label Heading | Mona Sans VF | 16px | 600 | 1.5 | normal | Small heading (H4) |
| Button Large | Mona Sans VF | 16px | 400 | 1.5 | normal | Button label (16px) |
| Link Large | Mona Sans | 16px | 500 | 1.5 | normal | Link (16px) — Decoration: none |
| Navigation | Mona Sans | 16px | 400 | 1.5 | normal | Navigation items |
| Sub-heading | Mona Sans VF | 14px | 600 | 1.5 | normal | Third-level heading (h3) |
| Body | Mona Sans VF | 14px | 400 | 1.5 | normal | Standard reading text |
| Button | Mona Sans VF | 14px | 500 | 1.43 | normal | Button label (14px) |
| Eyebrow / Overline | Mona Sans | 14px | 400 | 1.5 | normal | Label above heading, uppercase tag |
| Caption / Badge | Mona Sans | 12px | 500 | 0px | normal | small text (12px) |

### Font Weight Scale

CSS custom properties define 2 explicit weight steps:
- `--brand-Testimonial-quote-fontWeight-default`: `425` — Regular (custom, ~400)
- `--brand-Testimonial-quote-fontWeight-large`: `460` — Medium (custom, ~500)

### Full Font Size Scale

Sizes detected in the design (descending): `32px`, `24px`, `16px`, `14px`, `12px`

### 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
- **stylistic sets** (`ss0X`) — alternate letterforms enabled (often for brand-specific glyph variants)
- **contextual alternates** (`calt`) — connections between letters refined contextually
- **ligatures** — common letter pairs replaced with refined glyphs (fi, fl, etc.)

**Clone instruction:** Enable these in your CSS:
```css
body {
  font-feature-settings: "liga", "calt", "tnum", "ss02", "ss01";
}
```

**Variable font axes:**
- ITAL axis

## 4. Component Stylings

### Buttons

**Light / Invert**
- Background: `#efefef`
- Text: `#000000`
- Padding: 1px 6px
- Radius: 0px
- Font: 16px weight 400
- Use: Bright CTA on dark sections

**Ghost**
- Background: `transparent` `{colors.surface-1}`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 8px
- Radius: 0px
- Font: 16px weight 400
- Use: Subtle action, toolbar, nav button

**Ghost**
- Background: `transparent` `{colors.surface-1}`
- Text: `rgba(255, 255, 255, 0.75)` `{colors.on-primary}`
- Padding: 0px 0px 0px 8px
- Radius: 6px
- Font: 14px weight 400
- Use: Subtle action, toolbar, nav button

**Primary Brand**
- Background: `#1f883d` `{colors.primary}`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 5px 16px
- Radius: 6px
- Border: 1px solid rgba(31, 35, 40, 0.15)
- Font: 14px weight 500
- Use: Primary CTA / brand action

**Outline**
- Background: `transparent` `{colors.surface-1}`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 4px 12px
- Radius: 6px
- Border: 1px solid rgb(209, 217, 224)
- Font: 14px weight 400
- Use: Secondary action with border

**Icon Button**
- Background: `transparent` `{colors.surface-1}`
- Text: `#59636e`
- Padding: 0px
- Radius: 6px
- Border: 1px solid rgb(209, 217, 224)
- Font: 14px weight 500
- Use: Toolbar/UI icons

**Light / Invert**
- Background: `#f6f8fa`
- Text: `#25292e` `{colors.hairline}`
- Padding: 5px 16px
- Radius: 6px
- Border: 1px solid rgb(209, 217, 224)
- Font: 14px weight 500
- Use: Bright CTA on dark sections

### Inputs & Forms

**Text Input**
- Background: `transparent` `{colors.surface-1}`
- Text: `transparent` `{colors.surface-1}`
- Padding: 0px
- Radius: 6px
- Border: 0px none rgba(0, 0, 0, 0)
- Shadow: `rgba(31, 35, 40, 0.04) 0px 1px 0px 0px inset`
- Font: 14px weight 400
- Use: Text fields, search inputs

### Navigation

**Main Nav**
- Background: `#25292e` `{colors.hairline}`
- Padding: 16px 0px
- Radius: none
- Font: 16px weight 400
- Use: Fixed/sticky block nav — N/A items
- Hover: textDecoration: `underline`


## 4b. Component Behaviors (State Matrix)

### Interaction State Narrative


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

```yaml
component-behaviors:
  button:
    default:
      bg: "rgb(239, 239, 239)"
      fg: "rgb(0, 0, 0)"
  input:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgba(0, 0, 0, 0)"
      shadow: "rgba(31, 35, 40, 0.04) 0px 1px 0px 0px inset"
  link:
    default:
      bg: "rgb(9, 105, 218)"
      fg: "rgb(255, 255, 255)"
  card:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(31, 35, 40)"
  navLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 255, 255)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 255, 255)"
  footerLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(31, 35, 40)"
    hover:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(31, 35, 40)"
```

**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
- **5 shape(s)** in this system: `Light / Invert`, `Ghost`, `Primary Brand`, `Outline`, `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

## 5. Layout Principles

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

### Grid
Single column, centered content

### Max Width
80rem

### Spacing System
Compact spacing — information density prioritized

| Token | Value |
|-------|-------|
| xxs | 2px |
| xs | 6px |
| sm | 16px |
| md | 40px |
| base | 16px |
| lg | 24px |
| xl | 32px |
| 2xl | 48px |
| 3xl | 64px |

### Border Radius Scale
| Name | Value | Use |
|------|-------|-----|
| None | 0px | No rounding |
| Xs | 3px | Tiny corners (badges, micro elements) |
| Sm | 6px | Buttons, inputs, small elements |
| Md | 12px | Cards, containers |
| Lg | 12px | Large rounded elements, pill segments |
| Xl | 12px | Category strips, featured containers |
| Full | 9999px | Pills, avatars, circular elements |

### Shape Language

| Component | Border Radius |
|-----------|---------------|
| Buttons | `0px` |
| Inputs & Forms | `6px` |
| Navigation | `none` |
| Page Body | `0px` |
| Primary Input | `6px` |

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

**Full Radius Spectrum**: 0px, 3px, 6px, 12px (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** | `40px` | Card padding, list-item spacing |
| **compact** | `16px` | Form fields, tight clusters, badge padding |
| **micro** | `6px` | 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).

**2/8 structural patterns detected.**

### Navigation Pattern

- **Position:** static (scrolls with page)
- **Layout:** unknown — Layout not classified
- **Height:** 40px
- **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.

### Footer Pattern

- **Columns:** 2
- **Links:** 49 total
- **Height:** 600px
- **Includes:** ✗ no newsletter | ✓ social icons |  ✓ copyright
- **Clone instruction:** Build a 2-column footer with ~25 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(209, 217, 224, 0.25) 0px 0px 0px 1px`,<br>`rgba(37, 41, 46, 0.04) 0px 6px 12px -3px`,<br>`rgba(37, 41, 46, 0.12) 0px 6px 18px 0px` | Cards, elevated surfaces |
| Layered (Level 2) | <br>`rgba(209, 217, 224, 0) 0px 0px 0px 1px`,<br>`rgba(37, 41, 46, 0.24) 0px 40px 80px 0px` | Cards, elevated surfaces |
| Inset (Level 3) | <br>`rgba(31, 35, 40, 0.04) 0px 1px 0px 0px inset` | Buttons, pressed-state elements |
| Inset (Level 4) | <br>`rgb(209, 217, 224) 0px -1px 0px 0px inset` | Buttons, pressed-state elements |

**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 |
|--------------|-------|---------------|
| `--brand-control-animation-easing` | `cubic-bezier(.33, 1, .68, 1)` | Custom Ease — Balanced |
| `--brand-animation-easing-glide` | `cubic-bezier(.33, 1, .68, 1)` | Custom Ease — Balanced |
| `--easing-easeInOut` | `cubic-bezier(.65,0,.35,1)` | Ease Out — Decelerating |
| `--brand-animation-easing-default` | `cubic-bezier(.16, 1, .3, 1)` | Ease Out — Decelerating |
| `--base-easing-easeIn` | `cubic-bezier(.7, .1, .75, .9)` | Custom Ease — Balanced |
| `--brand-Card-animation-easing` | `cubic-bezier(.01, .73, .08, .93)` | Ease Out — Decelerating |
| `--base-easing-easeOut` | `cubic-bezier(.3, .8, .6, 1)` | Custom Ease — Balanced |
| `--base-easing-easeInOut` | `cubic-bezier(.6, 0, .2, 1)` | Ease Out — Decelerating |
| `--base-easing-linear` | `cubic-bezier(0, 0, 1, 1)` | Custom Ease — Balanced |
| `--base-easing-ease` | `cubic-bezier(.25, .1, .25, 1)` | Ease Out — Decelerating |

### Duration Scale

| CSS Variable | Value | Tier |
|--------------|-------|------|
| `--base-duration-600` | `.6s` | Slow |
| `--brand-InlineLink-transition-timing` | `.3s` | Normal |
| `--brand-control-animation-duration` | `80ms` | Fast |
| `--base-duration-50` | `50ms` | Instant |
| `--duration-fast` | `80ms` | Fast |
| `--base-duration-300` | `.3s` | Normal |
| `--base-duration-1000` | `1s` | Cinematic |
| `--base-duration-500` | `.5s` | Slow |
| `--brand-animation-duration-fast` | `.3s` | Normal |
| `--base-duration-400` | `.4s` | Slow |

### Copy-Paste Transition Snippets

**Opacity**
```css
transition: opacity 0.4s linear 0.4s;
```

**Opacity**
```css
transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
```

**Color / Background**
```css
transition: color 0.08s cubic-bezier(0.65, 0, 0.35, 1), fill 0.08s cubic-bezier(0.65, 0, 0.35, 1), background-color 0.08s cubic-b...;
```

**Opacity**
```css
transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1);
```

### Keyframe Animation Catalog

| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `AppFrame-a11yLink-focus` | Scale | color, transform | UI transition |
| `tooltip-appear` | Fade | opacity | UI transition |
| `fade-in` | Fade | opacity | Element entrance |
| `fade-out` | Fade | opacity | Element exit |
| `fade-up` | Fade + Move | opacity, transform | UI transition |
| `fade-down` | Fade + Move | opacity, transform | UI transition |
| `grow-x` | Custom | width | UI transition |
| `shrink-x` | Custom | width | UI transition |
| `scale-in` | Fade + Move | opacity, transform | Focus / emphasis |
| `pulse` | Fade | opacity | Attention / status |
| `pulse-in` | Scale | transform | Attention / status |
| `rotate-keyframes` | Rotate / Spin | transform | Loading indicator |
| `AnimatedEllipsis-keyframes` | Slide | transform | UI transition |
| `SelectMenu-modal-animation` | Fade + Move | opacity, transform | UI transition |
| `SelectMenu-modal-animation--sm` | Fade + Move | opacity, transform | UI transition |
| `Toast--animateIn` | Fade + Move | opacity, transform | UI transition |
| `Toast--animateOut` | Fade + Move | pointer-events, opacity, transform | UI transition |
| `Toast--spinner` | Rotate / Spin | transform | Loading indicator |
| `Overlay--motion-scaleFade` | Fade + Move | opacity, transform | Focus / emphasis |
| `Overlay--motion-slideDown` | Slide | transform | Panel / drawer enter |

> *34 additional animations omitted (repetitive variants). See raw keyframes in `raw-css.json`.*

### Motion Fingerprint

- **Speed Character**: Deliberate & Calm (median duration: `400ms`)
- **Dominant Easing**: custom cubic-bezier curves
- **Animation Library**: 54 unique animations (54 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 Warm Brown (`#1f2328`) for text — not pure black, it's warmer and more readable
- Use Mona Sans VF 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 Forest Green (`#1f883d`) as the primary accent — it's the brand's signature interactive color
- Use 6px border-radius on buttons — the standard corner rounding for interactive elements
- Maintain nav height at 40px — consistent vertical space for the navigation bar

### Don't
- 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 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 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(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(31, 136, 61)` for primary CTAs and brand-mark signals only"
    why: "Single chromatic assertion device — overuse dilutes meaning"
    test: "querySelectorAll('[style*=\"rgb(31, 136, 61)\"]').length <= 3 per fold"
```

## 9. Responsive Behavior

### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 400px | Single column, compact spacing |
| Mobile | 480px | Single column, compact spacing |
| Mobile Large | 618px | Expanded mobile layout |
| Mobile Large | 767px | Expanded mobile layout |
| Tablet | 1011px | Multi-column grids begin |
| Desktop | 1150px | Full feature layout |
| Desktop | 1250px | Full feature layout |
| Large Desktop | 1464px | Maximum content width |

### Token Diff — Desktop vs Mobile

| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| nav | height | `40px` | `324px` |
| button | width | `100%` | `390px` |

### Collapsing Strategy
- 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: 1px 6px 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):

*No major structural differences detected between desktop and mobile widgets. The same blueprints scale rather than collapse — verify by inspecting actual mobile render.*

## 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://github.githubassets.com/assets/github-logo-55c5b9a1fe52.png (1200×1200px)
  *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: 3.39:1 (ultra-wide cinematic)
- Rendered size: 1440×425px
- *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): 1 (14%)
- Square (0.87–1.15): 1 (14%)
- Ultra-wide (>2.3): 5 (71%)

**Media Format Mix:**

**Average rendered image size:** 456×187px
**Above-fold image count:** 7 / 7

**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: Text White (`#ffffff`)
- Primary text: Warm Brown (`#1f2328`)
- Accent: Forest Green (`#1f883d`)
- Border: Warm Brown (`#25292e`)
- Font: Mona Sans VF
- Body: 14px weight 400

### Example Component Prompts
- "Create a hero section on Text White background (#ffffff). Headline at 32px Mona Sans VF weight 600, line-height 1.5, color #1f2328."
- "Create the primary CTA button: `#1f883d` background, `#ffffff` text, 6px border-radius, 5px 16px padding, 500 weight, Mona Sans VF font."
- "Design a card on `transparent` background. Border: none. Radius: 0px. Shadow: none. Padding: 0px."
- "Build navigation: static on `#ffffff`. Mona Sans VF 16px weight 400 for links."

### Iteration Guide
1. **Canvas**: Set the light canvas to Text White (`#ffffff`) — every component is composited against this exact base.
2. **Typography**: All type in Mona Sans VF, weight range 400–600. Never exceed 600 — heavier weights break the brand's tonal restraint.
3. **Accent**: Forest Green (`#1f883d`) is the sole interactive color. On hover → M Tricolor Blue (`#0969da`). Use CSS transitions, not opacity/brightness filters.
4. **Motion**: All transitions use `cubic-bezier(0.16,1,0.3,1)`. Timing: 50ms for micro-interactions, 400ms 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 (6px–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-on-primary: #ffffff;
  --ca-surface-1: transparent;
  --ca-surface-2: #e4ebe6;
  --ca-primary-hover: #1f2328;
  --ca-ink-subtle: #58635b;
  --ca-primary: #1f883d;
  --ca-hairline: #25292e;
  --ca-primary-focus: #0969da;
  --ca-semantic-error: #d1242f;
  --ca-semantic-success: #1a7f37;
  --ca-semantic-warning: #9a6700;
}

/* Typography */
:root {
  --ca-font-primary: "Mona Sans VF", system-ui, sans-serif;
  --ca-text-display: 32px;
  --ca-text-body: 16px;
  --ca-text-small: 16px;
  --ca-text-caption: 12px;
  --ca-text-button: 16px;
}

/* Spacing & Radius */
:root {
  --ca-space-xxs: 2px;
  --ca-space-xs: 6px;
  --ca-space-sm: 16px;
  --ca-space-md: 40px;
  --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: 3px;
  --ca-radius-sm: 6px;
  --ca-radius-md: 12px;
  --ca-radius-lg: 12px;
  --ca-radius-xl: 12px;
  --ca-radius-full: 9999px;
}

/* Motion */
:root {
  --ca-duration-fast: 80ms;
}
```


## 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
    classes: ["logged-out", "page-responsive", "min-height-full", "d-flex"]
    height: 1219px
    width: full-bleed
    layout: flex-column justify=normal
    children: 12
  - section: main-content
    tag: main
    classes: ["font-mktg"]
    height: 547px
    width: full-bleed
    layout: block
    children: 2
  - section: unknown
    tag: div
    classes: ["container-lg", "tmp-mt-5", "tmp-px-3", "tmp-pb-5"]
    height: 145px
    width: 1012px
    layout: block
    children: 2
    padding: "0px 16px 32px"
  - section: footer
    tag: footer
    classes: ["footer", "tmp-pt-6", "position-relative"]
    height: 600px
    width: full-bleed
    layout: block
    children: 3
    padding: "40px 0px 0px"
  - section: unknown
    tag: div
    classes: ["container-xl"]
    height: 444px
    width: 1280px
    layout: block
    children: 1
    padding: "0px 16px"
  - section: navigation
    tag: nav
    classes: ["col-6", "col-sm-3", "col-lg-2", "tmp-mb-6"]
    height: 372px
    width: 208px
    layout: block
    children: 2
    padding: "0px 0px 0px 24px"
  - section: navigation
    tag: nav
    classes: ["col-6", "col-sm-3", "col-lg-2", "tmp-mb-6"]
    height: 372px
    width: 208px
    layout: block
    children: 2
    padding: "0px 0px 0px 24px"
  - section: navigation
    tag: nav
    classes: ["col-6", "col-sm-3", "col-lg-2", "tmp-mb-6"]
    height: 372px
    width: 208px
    layout: block
    children: 2
    padding: "0px 0px 0px 24px"
  - section: navigation
    tag: nav
    classes: ["col-6", "col-sm-3", "col-lg-2", "tmp-mb-6"]
    height: 372px
    width: 208px
    layout: block
    children: 2
    padding: "0px 0px 0px 24px"
  - section: section-10
    tag: section
    classes: ["col-12", "col-lg-4", "tmp-mb-5", "tmp-pr-lg-4"]
    height: 348px
    width: 416px
    layout: block
    children: 4
    padding: "0px 24px 0px 0px"
  - section: unknown
    tag: div
    classes: ["container-xl", "f6", "tmp-py-4", "d-md-flex"]
    height: 84px
    width: 1280px
    layout: flex-row justify=space-between
    children: 2
    padding: "24px 16px"
```

**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:
  sub-headings:
    - "Subscribe to our developer newsletter"
    - "Platform"
  ctas:
    - "Platform"
    - "Search or jump to..."
    - "Sign in"
    - "Sign up"
    - "Search"
    - "Subscribe"
    - "Manage cookies"
    - "English 
Select language"
  navigation:
    - "Sign in"
    - "Pricing"
    - "Search syntax tips"
    - "documentation"
    - "Forgot password?"
    - "or continue with other methods"
    - "Sign up"
    - "Features"
    - "Enterprise"
    - "Copilot"
  footer-links:
    - "Subscribe"
    - "Features"
    - "Terms"
    - "GitHub on LinkedIn"
    - "GitHub on YouTube"
    - "GitHub’s organization on GitHub"
```

**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:
  logo:
    count: 2
    avg-ratio: 2.85
    common-aspect: "~16:6 banner"
  hero:
    count: 1
    avg-ratio: 3.39
    common-aspect: "~16:6 banner"
  product:
    count: 1
    avg-ratio: 1.09
    common-aspect: "~1:1 square"
    sample-alts:
      - "404 “This is not the web page you are looking for”"
```

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

**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: 88/100 (B)

| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 21 | 25 | 15 named colors |
| Typography | 20 | 20 | 11 roles defined |
| Components | 12 | 20 | 3 specs extracted |
| Motion & Interaction | 15 | 15 | Keyframes present, easing vars |
| CSS Custom Properties | 10 | 10 | 1985 vars |
| Responsive Breakpoints | 5 | 5 | 8 breakpoints |
| Variable Fonts | 5 | 5 | ITAL 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 | 1985 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 11 typography roles inferred |
| §4 Components | Medium | 3 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 15 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 8 breakpoints detected |
| §9b Photography | High | 7 images, hero present |

---
*Generated by Clone Architect — automated Playwright extraction + design analysis.*
*Source: https://github.com/paulsainton/lifeos-app.git | 2026-05-30T21:32:13.958Z*
*All values verified via getComputedStyle() — no approximation, no hallucination.*