vitejs.dev

DESIGN.md

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

---
version: alpha
name: vitejs.dev
description: "Dark-canvas product system built on #16171d with #ffffff as the single brand accent. Type anchored in APK Protocol at 60px / weight 500. Extracted automatically from https://vitejs.dev/ — rendered styles via getComputedStyle() + CSS custom properties (token-only values may not be painted)."
narrative: |
  vitejs.dev is built on a near-black canvas (rgb(22, 23, 29)).
  The system uses rgb(255, 255, 255) as the singular interactive color.
  Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside APK Protocol as the primary typeface.
  APK Protocol is paired with KH Teka Mono for secondary roles.
  A restrained elevation system (2 distinct shadows) — shadows reserved for the few elements that must lift off the page.
  Motion is a first-class concern — 8 keyframe animations plus transition-driven interactions.

colors:
  canvas: "#16171d"
  surface-2: "#08060d"
  ink: "#ffffff"
  ink-muted: "#98989f"
  ink-subtle: "#808080"
  primary: "#ffffff"
  on-primary: "#111111"
  primary-hover: "#414853"
  hairline: "#6a6a71"
  primary-focus: "#b39aff"
  semantic-error: "#ef5350"
  semantic-success: "#3dd68c"
  semantic-warning: "#f9b44e"

typography:
  display-xl:
    fontFamily: "APK Protocol, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 60px
    fontWeight: 500
    lineHeight: 1.12
    letterSpacing: -3px
  display-md:
    fontFamily: "APK Protocol, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 40px
    fontWeight: 500
    lineHeight: 1.33
    letterSpacing: -1px
  headline:
    fontFamily: "APK Protocol, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 24px
    fontWeight: 500
    lineHeight: 1.17
    letterSpacing: 0
  body:
    fontFamily: "Inter, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1
    letterSpacing: 0
  body-sm:
    fontFamily: "APK Protocol, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: 0
  button:
    fontFamily: "Inter, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 16px
    fontWeight: 500
    lineHeight: 1.4
    letterSpacing: 0

rounded:
  none: 0px
  xs: 4px
  sm: 8px
  md: 14px
  lg: 20px
  xl: 32px
  pill: 9999px

spacing:
  xxs: 2px
  xs: 8px
  sm: 20px
  md: 24px
  lg: 40px
  xl: 60px
  xxl: 96px

components:
  button-icon-button:
    backgroundColor: "transparent"
    textColor: "{colors.primary}"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 8px
  button-ghost:
    backgroundColor: "transparent"
    textColor: "{colors.primary}"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 8px 12px
  button-dark--solid:
    backgroundColor: "#14121a"
    textColor: "{colors.ink-muted}"
    typography: "{typography.body}"
    rounded: "{rounded.sm}"
    padding: 8px 12px
  card-standard-card:
    backgroundColor: "transparent"
    typography: "{typography.button}"
    rounded: "{rounded.sm}"
    padding: 40px 32px
  navigation-main-nav:
    backgroundColor: "{colors.canvas}"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 20px 24px
  testimonial-quote-card:
    backgroundColor: "transparent"
    textColor: "{colors.primary}"
    typography: "{typography.button}"
    rounded: "{rounded.sm}"
    padding: 40px 32px
  tab-pill-tab:
    backgroundColor: "#14121a"
    textColor: "{colors.primary}"
    typography: "{typography.button}"
    rounded: "{rounded.sm}"
    padding: 0px 12px
  code-block-inline-code--pre:
    backgroundColor: "transparent"
    textColor: "{colors.primary}"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 20px 0px

extracted_at: "2026-06-11T06:20:36.904Z"
completeness: 87
scoreVersion: "v2"

---

# Design System — vitejs.dev
> Extracted automatically by Prism from https://vitejs.dev
> Date: 2026-06-11
> 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).


## 0. Design DNA

**Density**: sparse  |  **Motion**: animated  |  **Weight**: light  |  **Aesthetic**: dark-premium

| Dimension | Value | Signal |
|---|---|---|
| Canvas | dark | `#16171d` |
| Type posture | sans-led (Inter) | "The Build Tool for the Web" |
| Color assertion | dual-accent | #ffffff |
| Whitespace | sparse | section rhythm 64px |
| Interaction | animated | 8 keyframes, 10 transitions |
| Radius language | 8px-rounded | from token scale |

**Prism fingerprint**: `dark-canvas · sans-display · dual-accent · 8px-rounded · animated-motion`

> **🤖 TL;DR for AI agents** (read this first — saves you scanning the full doc):
>
> - **Canvas**: `rgb(22, 23, 29)` is the page background. Every component composits against this.
> - **Accent**: `rgb(255, 255, 255)` for primary CTAs ONLY. Never decorative.
> - **Body type**: 16px (token: `typography.body`). Default for ALL text not in a heading role.
> - **Section rhythm**: 64px between major bands. Card padding: 40px.
> - **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

vitejs.dev commits fully to dark-mode as the native medium, not as a toggled alternative. The canvas is a dark surface (`#16171d`) where surfaces are layered through stepped luminance — each elevated level is slightly less dark than the one beneath it, creating depth without color shifts. 

Headlines are set in **APK Protocol**, a sans-serif display face (the dominant type signature, e.g. "The Build Tool for the Web" at 60px). Body text is set in **Inter**. Negative letter-spacing at display sizes (-3px at 60px) compresses headlines into engineered blocks, dense and authoritative. 

Body text reads in White (`#ffffff`). **White** (`#ffffff`) provides interactive distinction without visual aggression. Elevation comes from a small, deliberate set of shadows (2 distinct), each a multi-layer stack — several blurred layers at varying offsets — used sparingly rather than across the whole UI. 
Motion design uses smooth easing curves for polished state transitions. 

**Key Characteristics:**
- Background: Near-Black (`#16171d`)
- Primary typeface: APK Protocol
- Primary text: White (`#ffffff`)
- Accent: White (`#ffffff`)
- Display: 60px weight 500, letter-spacing -3px
- Shadow system: 2 distinct elevation levels
- Custom fonts loaded: APK Protocol, KH Teka Mono, Inter, Punctuation SC

## 2. Color Palette & Roles

### Background & Surface
- **Primary** (`#16171d`): Page background (primary)
- **Pure Black** (`#000000`): Surface / elevated background
- **Pure Black** (`#08060d`): Surface / elevated background
- **Nickel** (`#3b3440`): Surface / elevated background
- **Slate** (`#14121a`): Surface / elevated background

### Text & Content
- **White** (`#ffffff`): Primary body text
- **Grey** (`#98989f`): Secondary text
- **Grey** (`#867e8e`): Secondary text
- **Light Grey** (`#cccccc`): Secondary text

### Accent & Interactive
- **Brand** (`#b39aff`): Accent / interactive (CSS var)

### Border & Divider
- **Stroke** (`#e5e4e7`): Border (CSS var)
- **Charcoal** (`#2e2e32`): Borders / dividers

### Full Extracted Palette
**13 colors rendered on the page** + **38** more declared in design tokens (CSS custom properties — not necessarily painted). (12 categorized above + 39 additional below.)
Rendered values are read via `getComputedStyle()`; token values come from CSS variable declarations. Third-party logo colors are filtered out.

- `#370a7f` — #370a7f
- `#6a6a71` — Slate Grey
- `#f9b44e` — #f9b44e *(token)*
- `#32363f` — Charcoal *(token)*
- `#3772cf` — Royal Blue *(token)*
- `#3dd68c` — #3dd68c *(token)*
- `#22ff73` — Zest *(token)*
- `#5c73e7` — Brand Indigo *(token)*
- `#a879e6` — #a879e6 *(token)*
- `#140033` — Wine *(token)*
- `#db2777` — Cherry *(token)*
- `#f14158` — Warm Rose *(token)*
- `#8e5cd9` — Amethyst *(token)*
- `#808080` — Slate Grey *(token)*
- `#bbd1ff` — Light Blue *(token)*
- `#da8b17` — #da8b17 *(token)*
- `#ef5350` — Vermillion *(token)*
- `#6c3bff` — Electric *(token)*
- `#a46a0a` — #a46a0a *(token)*
- `#a8b1ff` — Lavender *(token)*
- `#414853` — Dark Gray *(token)*
- `#f66f81` — #f66f81 *(token)*
- `#c8abfa` — Lavender *(token)*
- `#298459` — Teal *(token)*
- `#c37d0d` — Honey *(token)*
- `#d45656` — Terracotta *(token)*
- `#515c67` — Slate *(token)*
- `#b62a3c` — #b62a3c *(token)*
- `#e0e3e8` — Whitesmoke *(token)*
- `#3c3f44` — Charcoal *(token)*
- `#30a46c` — Teal *(token)*
- `#1ba673` — Emerald *(token)*
- *…+7 more in `raw-css.json` (`desktop.allColors`).*

### CSS Custom Properties (Design Tokens)

**Shadow Token**
- `--tw-inset-shadow-alpha`: `100%`
- `--vp-shadow-5`: `0 18px 56px #00000029, 0 4px 12px #00000029`
- `--tw-inset-ring-shadow`: `0 0 #0000`
- `--tw-inset-shadow`: `0 0 #0000`

**Font Family Token**
- `--vp-font-family-mono`: `"KH Teka Mono", monospace`
- `--vp-font-family-base`: `Inter, sans-serif`
- `--default-font-family`: `Inter, sans-serif`
- `--default-mono-font-family`: `"KH Teka Mono", monospace`

**Spacing Token**
- `--docsearch-spacing`: `12px`
- `--spacing`: `.25rem`
- `--tw-space-y-reverse`: `0`
- `--color-space`: `#103`

**Border Radius Token**
- `--radius-sm`: `.25rem`
- `--radius-md`: `.375rem`
- `--radius-lg`: `.5rem`
- `--docsearch-border-radius`: `4px`

**Font Size Token**
- `--vp-code-font-size`: `.875em`
- `--twoslash-code-font-size`: `1em`
- `--vp-custom-block-font-size`: `14px`
- `--vp-custom-block-code-font-size`: `13px`

**Motion Token**
- `--default-transition-duration`: `.15s`
- `--default-transition-timing-function`: `cubic-bezier(.4, 0, .2, 1)`

**Z-Index Token**
- `--vp-z-index-sidebar`: `25`
- `--vp-z-index-backdrop`: `50`
- `--vp-z-index-footer`: `10`
- `--vp-z-index-nav`: `30`

**Border**
- `--color-stroke`: `#e5e4e7`

**Font Weight Token**
- `--font-weight-semibold`: `600`
- `--font-weight-medium`: `500`

**Primary Brand Color**
- `--color-brand`: `#b39aff`
- `--color-primary`: `#16171d`

**Other tokens**
- `--vp-local-nav-bg-color`: `#16171d`
- `--vp-c-text-3`: `#6a6a71`
- `--twoslash-tag-bg`: `#3772cf20`
- `--docsearch-background-color`: `#14121a`
- `--docsearch-sidepanel-hit-color`: `#fff`
- `--vp-badge-info-bg`: `#65758529`
- `--vp-code-line-number-color`: `#98989f`
- `--twoslash-docs-color`: `#fff`

## 3. Typography Rules

### Font Families
- **Primary**: `Inter`
- **Secondary**: `APK Protocol`
- **Font 3**: `KH Teka Mono`
- **Font 4**: `Punctuation SC`

### Custom Fonts Loaded
- **APK Protocol** weight 500 (normal)
- **APK Protocol** weight 700 (normal)
- **KH Teka Mono** weight 400 (normal)
- **KH Teka Mono** weight 500 (normal)
- **Inter** weight 100 900 (normal)
- **Punctuation SC** weight 400 (normal)
- **Punctuation SC** weight 500 (normal)
- **Punctuation SC** weight 600 (normal)
- **Punctuation SC** weight 700 (normal)

### Typography Hierarchy

| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | APK Protocol | 60px | 500 | 1.12 | -3px | Main headline (h1) |
| Sub-heading | APK Protocol | 40px | 500 | 1.33 | -1px | Third-level heading (h3) |
| Label Heading | APK Protocol | 24px | 500 | 1.17 | normal | Small heading (H5) |
| Label Heading | APK Protocol | 20px | 500 | 1.4 | normal | Small heading (H6) |
| Card Title | Inter | 16px | 400 | 1.4 | normal | Card headings |
| Button Large | Inter | 16px | 500 | 1.4 | normal | Button label (16px) |
| Nav Link | APK Protocol | 16px | 400 | 1.5 | normal | Navigation anchor |
| Button | Inter | 14px | 400 | 1 | normal | Button label (14px) |

### Font Weight Scale

CSS custom properties define 2 explicit weight steps:
- `--font-weight-medium`: `500` — Medium
- `--font-weight-semibold`: `600` — SemiBold

### Full Font Size Scale

Sizes detected in the design (descending): `60px`, `48px`, `40px`, `24px`, `20px`, `18px`, `16px`, `14px`, `13px`, `12px`

> 4 size(s) detected outside the sampled hierarchy (48px, 18px, 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

**Icon Button**
- Background: `transparent`
- Text: `#ffffff` `{colors.primary}`
- Padding: 8px
- Radius: 0px
- Font: 16px weight 400
- Use: Toolbar/UI icons
- Focus: outline: `rgb(16, 16, 16) auto 4px`

**Ghost**
- Background: `transparent`
- Text: `#ffffff` `{colors.primary}`
- Padding: 8px 12px
- Radius: 0px
- Font: 16px weight 400
- Use: Subtle action, toolbar, nav button
- Focus: outline: `rgb(16, 16, 16) auto 4px`

**Dark / Solid**
- Background: `#14121a`
- Text: `#98989f` `{colors.ink-muted}`
- Padding: 8px 12px
- Radius: 8px
- Font: 14px weight 400
- Use: Solid dark CTA
- Focus: outline: `rgb(16, 16, 16) auto 4px`

**Ghost**
- Background: `transparent`
- Text: `#ffffff` `{colors.primary}`
- Padding: 8px 16px
- Radius: 8px
- Font: 16px weight 500
- Use: Subtle action, toolbar, nav button
- Focus: outline: `rgb(16, 16, 16) auto 4px`

**Icon Button**
- Background: `#14121a`
- Text: `#ffffff` `{colors.primary}`
- Padding: 0px
- Radius: 4px
- Border: 1px solid rgb(46, 46, 50)
- Font: 16px weight 400
- Use: Toolbar/UI icons
- Focus: outline: `rgb(16, 16, 16) auto 4px`

**Light / Invert**
- Background: `#ffffff` `{colors.primary}`
- Text: `#16171d` `{colors.canvas}`
- Padding: 8px 16px
- Radius: 8px
- Font: 16px weight 500
- Use: Bright CTA on dark sections
- Focus: outline: `rgb(16, 16, 16) auto 4px`

### Cards & Containers

**Standard Card**
- Background: `transparent`
- Padding: 40px 32px
- Radius: 8px
- Use: Content containers, listing items

### Navigation

**Main Nav**
- Background: `#16171d` `{colors.canvas}`
- Padding: 20px 24px
- Radius: none
- Font: 16px weight 400
- Use: Fixed/sticky flex nav — N/A items

### Testimonials

**Quote Card**
- Background: `transparent`
- Text: `#ffffff` `{colors.primary}`
- Padding: 40px 32px
- Radius: 8px
- Font: 16px weight 400
- Use: Customer quote with avatar + company attribution

### Tabs

**Pill Tab**
- Background: `#14121a`
- Text: `#ffffff` `{colors.primary}`
- Padding: 0px 12px
- Radius: 8px 8px 0px 0px
- Font: 16px weight 400
- Use: Navigation tabs, filter tabs

### Code Blocks

**Inline Code / Pre**
- Background: `transparent`
- Text: `#ffffff` `{colors.primary}`
- Padding: 20px 0px
- Radius: 0px
- Font: 16px weight 400 — "KH Teka Mono"
- Use: Code samples, CLI commands, syntax highlighting blocks


## 4b. Component Behaviors (State Matrix)

### Interaction State Narrative

- **FooterLink**:
  - **hover:** shadow added

*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)"
    focus:
      bg: "transparent"
      fg: "inherit"
  link:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 255, 255)"
  card:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 255, 255)"
  navLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 255, 255)"
  footerLink:
    default:
      bg: "rgb(255, 255, 255)"
      fg: "rgb(22, 23, 29)"
    hover:
      bg: "transparent"
      fg: "inherit"
```

**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: `Icon Button`, `Ghost`, `Dark / Solid`, `Light / Invert`
- **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

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

### Testimonials
- **1 shape(s)** in this system: `Quote Card`
- **DO NOT introduce new testimonials variants** without justification

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

### Code Blocks
- **1 shape(s)** in this system: `Inline Code / Pre`
- **DO NOT introduce new code blocks variants** without justification

## 5. Layout Principles

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

### Grid
Single column, centered content

### Max Width
1440px

### Spacing System
Generous spacing — editorial breathing room

| Token | Value |
|-------|-------|
| xxs | 2px |
| xs | 8px |
| sm | 20px |
| md | 24px |
| base | 32px |
| lg | 40px |
| xl | 60px |
| 2xl | 64px |
| 3xl | 96px |

### Border Radius Scale
| Name | Value | Use |
|------|-------|-----|
| None | 0px | No rounding |
| Xs | 4px | Tiny corners (badges, micro elements) |
| Sm | 8px | Buttons, inputs, small elements |
| Md | 14px | Cards, containers |
| Lg | 20px | 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 | `8px` |
| Navigation | `none` |
| Testimonials | `8px` |
| Tabs | `8px 8px 0px 0px` |
| Code Blocks | `0px` |
| Page Body | `0px` |

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

**Full Radius Spectrum**: 0px, 4px, 6px, 8px (from `allBorderRadii` scan)


## 5b. Spacing Rhythm Names

**Measured section padding**: bands use ~112px internal vertical padding (up to 120px) — **very airy / premium**. (Distinct from the gap *between* sections above.) Reproduce this generous vertical breathing room; cramped spacing is the #1 tell of a cheap clone.

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

| Name | Value | Use case |
|------|-------|----------|
| **hero** | `96px` | Top/bottom of full-bleed hero sections |
| **section** | `60px` | Between major bands (color change, content shift) |
| **subsection** | `40px` | Within a section, between content groups |
| **card** | `24px` | Card padding, list-item spacing |
| **compact** | `20px` | Form fields, tight clusters, badge padding |
| **micro** | `8px` | 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:** left-aligned — 
- **Viewport coverage:** 337px tall (not full-viewport)
- **Heading:** "The Build Tool for the Web" — 60px left-aligned
- **Subheading:** "Vite is a blazing fast frontend build tool powering the next generation of web applications."
- **CTAs:** 2 (primary: "Get Started")
- **Clone instruction:** Reproduce the **left-aligned** layout. Use the heading font-size token at the documented size. Pair the centered text with the hero’s decorative visual (gradient / SVG / hero image — see §9b), not bare text.

### Navigation Pattern

- **Position:** static (scrolls with page)
- **Layout:** unknown — Layout not classified
- **Height:** 40px
- **Logo:** ✗ absent
- **Nav links:** 3 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:** 4 cards detected
- **Columns (desktop):** 2-up grid
- **Card dimensions:** 719×554px (aspect 1.3:1)
- **Gap:** 0px between cards
- **Content:** ✓ image
- **Image position:** top
- **Clone instruction:** Build a 2-column grid (desktop) with cards at ~1.3:1 aspect ratio. Each card has an image at the top.

### Testimonial Pattern

- **Count:** 9 testimonial blocks
- **Layout:** grid
- **Avg quote length:** 126 chars (medium quote)
- **Includes:** ✓ avatars | ✗ no logos | ✗ no ratings
- **Clone instruction:** Build a grid of 9 testimonials. Each includes an avatar.  

### Footer Pattern

- **Columns:** 1
- **Links:** 18 total
- **Height:** 1044px
- **Includes:** ✗ no newsletter | ✓ social icons |  ✓ copyright
- **Clone instruction:** Build a 1-column footer with ~18 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 10px 15px -3px`,<br>`rgba(0, 0, 0, 0.1) 0px 4px 6px -4px` | Cards, elevated surfaces |
| Inset (Level 2) | <br>`rgb(0, 0, 0) 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 |
|--------------|-------|---------------|
| `--default-transition-timing-function` | `cubic-bezier(.4, 0, .2, 1)` | Ease Out — Decelerating |
| `--ease-out` | `cubic-bezier(0, 0, .2, 1)` | Ease Out — Decelerating |
| `--ease-smooth` | `cubic-bezier(.25,.8,.4,1)` | Custom Ease — Balanced |
| `--ease-fast` | `cubic-bezier(.45,.15,.6,.9)` | Custom Ease — Balanced |
| `--ease-in-out` | `cubic-bezier(.4, 0, .2, 1)` | Ease Out — Decelerating |

### Duration Scale

| CSS Variable | Value | Tier |
|--------------|-------|------|
| `--default-transition-duration` | `.15s` | Fast |

### Copy-Paste Transition Snippets

**Transform**
```css
transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), translate 0.2s cubic-bezier(0.4, 0, 0.2, 1), scale 0.2s cubic-bezier(0.4...;
```

**Opacity**
```css
transition: opacity 0.15s cubic-bezier(0.4, 0, 0.2, 1);
```

**Transform**
```css
transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1), translate 0.15s cubic-bezier(0.4, 0, 0.2, 1), scale 0.15s cubic-bezier(...;
```

**All Props**
```css
transition: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
```

### Keyframe Animation Catalog

| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `fadeIn-d05aa6b7` | Fade | opacity | Element entrance |
| `scroll-horizontal-0d857a7f` | Slide | transform | UI transition |
| `event-card-hover` | Custom | background-position-x, background-position-y | UI transition |
| `fade-in` | Fade | opacity | Element entrance |
| `slideDown` | Fade + Move | opacity, transform | Panel / drawer enter |
| `shimmerText` | Custom | background-position-x, background-position-y | Loading placeholder |
| `fadeIn` | Fade | opacity | Element entrance |
| `pulse` | Fade | opacity | Attention / status |

### Motion Fingerprint

- **Speed Character**: Balanced Pacing (median duration: `250ms`)
- **Dominant Easing**: custom cubic-bezier curves
- **Animation Library**: 8 unique animations (8 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 dark background (`#16171d`) as the foundation — this is a dark-mode-native design
- Use Inter 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 negative letter-spacing (-3px) at display sizes for compressed, editorial headlines
- Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
- Use White (`#ffffff`) 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
- Apply 40px 32px padding inside cards — matches the design system's content breathing room
- Use 8px border-radius on cards — consistent with the grid card corners
- Maintain nav height at 40px — consistent vertical space for the navigation bar
- Include exactly 2 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
- Show person avatars with testimonials — social proof is human-centric here
- Lay out testimonials in a grid (9+ items) — quantity signals scale and trust

### Don't
- Don't use light backgrounds — the dark canvas is the native medium
- 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 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 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(22, 23, 29)` as the base canvas"
    why: "Every component is designed to composit against this exact tone"
    test: "document.body.style.backgroundColor === 'rgb(22, 23, 29)'"
  - id: brand-accent-001
    type: do
    rule: "Reserve `rgb(255, 255, 255)` for primary CTAs and brand-mark signals only"
    why: "Single chromatic assertion device — overuse dilutes meaning"
    test: "querySelectorAll('[style*=\"rgb(255, 255, 255)\"]').length <= 3 per fold"
```

## 9. Responsive Behavior

### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 375px | Single column, compact spacing |
| Mobile Large | 639px | Expanded mobile layout |
| Mobile Large | 767px | Expanded mobile layout |
| Tablet | 1024px | Multi-column grids begin |
| Desktop | 1280px | Full feature layout |
| Large Desktop | 1440px | Maximum content width |

### Token Diff — Desktop vs Mobile

| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| heading | font-size | `60px` | `36px` |
| heading | line-height | `67.2px` | `40px` |
| heading | letter-spacing | `-3px` | `-1.8px` |
| nav | display | `flex` | `none` |
| nav | height | `40px` | `auto` |
| button | width | `36px` | `auto` |
| card | padding | `40px 32px` | `24px` |
| card | width | `439.328px` | `350px` |

### Collapsing Strategy
- Headlines: 60px → 36px 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 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 left-aligned → centered** — composition shifts (verify on actual mobile render).
- **Card grid: 2-up → 1-up** — cards stack as viewport narrows, becoming a vertical list on mobile.


## 7c. Visual Effects & Dynamic Behavior

*The live/dynamic layer beyond static CSS — reproduce these, not flat substitutes. This is often what separates a faithful clone from a wireframe.*

- **Canvas / 2D rendering** — animated/interactive canvas (charts, graphs, particle fields). Reproduce as live data-viz (e.g. an animated SVG/Canvas line chart), NOT a static image.
- **Mesh gradients** — 1 multi-stop organic color field(s) as background atmosphere.
- **Clip-path shapes** — 1 non-rectangular cut(s).
- **Blend modes** — 1 mix-blend layer(s).
- **Scroll-driven reveals** — content animates in on scroll (CSS scroll-timeline). Build fade/translate reveal-on-scroll for below-fold bands.

> **Motion fingerprint**: Canvas 2D, mesh gradients, non-rectangular shapes (1), blend modes, CSS scroll-driven animations

## 9b. Visual Tone & Photography

**Tone:** Illustration-driven

The site relies primarily on illustrations, vector art, and decorative SVG elements rather than photography. Use commissioned illustrations, icon sets, or generated graphics for clones — stock photos will feel off-brand.

**Canonical Brand Image (OG):**
- https://vite.dev/og-image.jpg
  *This is the image shown when the site is shared on social media — represents the brand visual essence.*

**Aspect Ratio Distribution:**
- Landscape (1.15–2.3): 9 (47%)
- Portrait (<0.87): 0 (0%)
- Square (0.87–1.15): 0 (0%)
- Ultra-wide (>2.3): 10 (53%)

**Media Format Mix:**
- JPG: 4 (typically photographic content)
- PNG: 8 (logos, transparent UI elements, mockups)
- SVG: 7 (icons, illustrations, decorative geometry)

**Average rendered image size:** 523×197px
**Above-fold image count:** 0 / 19

**Decorative Patterns Detected:**
- 2 multi-stop linear gradients (mesh-like, 3+ color stops) — the brand leans on rich color transitions for visual depth
- 1 radial gradient — circular color blooms used for spotlight/glow effects
- 5 background patterns (non-photo url() backgrounds) — textures/illustrations as backdrops

**Clone instruction for decorative work:** Decorative details are subtle — don't over-style; the design relies on restraint.

**Imagery Guidance for clones:**
- Use vector illustration as the primary visual language — photos will read as off-brand.
- Maintain consistent illustration style (line weight, color palette) across the site.

## 10. Agent Prompt Guide

### Quick Reference
- Background: Near-Black (`#16171d`)
- Primary text: White (`#ffffff`)
- Accent: White (`#ffffff`)
- Border: Slate Grey (`#6a6a71`)
- Font: Inter
- Body: 16px weight 400

### Example Component Prompts
- "Create a hero section on Near-Black background (#16171d). Headline at 60px Inter weight 500, line-height 1.12, letter-spacing -3px, color #ffffff."
- "Create the primary CTA button: `#ffffff` background, `#ffffff` text, 9999px border-radius, 8px padding, 500 weight, Inter font."
- "Design a card on `transparent` background. Border: none. Radius: 8px. Shadow: none. Padding: 40px 32px."
- "Build navigation: static on `#16171d`. Inter 16px weight 400 for links."

### Iteration Guide
1. **Canvas**: Set the dark canvas to Near-Black (`#16171d`) — every component is composited against this exact base.
2. **Typography**: All type in Inter, weight range 400–600. Never exceed 600 — heavier weights break the brand's tonal restraint.
3. **Accent**: White (`#ffffff`) is the sole interactive color. On hover → Brand (`#b39aff`). Use CSS transitions, not opacity/brightness filters.
4. **Focus**: Render focus rings in Vite (`#b39aff`) — never hide focus outlines. The ring color is distinct from the accent to avoid ambiguity.
5. **Motion**: All transitions use `cubic-bezier(0.4,0,0.2,1)`. Timing: 150ms for micro-interactions, 150ms for layout changes. Never use linear for UI transitions — preserve the brand's easing personality.
6. **Shape**: CTAs at `0px`, cards at `8px`. Apply border-radius from the extracted scale only — don't invent intermediate values.
7. **Spacing**: Use the `--ca-space-*` token scale (8px–60px). All padding, margin, and gap values are multiples from this scale — no magic numbers.
8. **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-canvas: #16171d;
  --ca-surface-2: #08060d;
  --ca-primary: #ffffff;
  --ca-ink-muted: #98989f;
  --ca-ink-subtle: #808080;
  --ca-on-primary: #111111;
  --ca-primary-hover: #414853;
  --ca-hairline: #6a6a71;
  --ca-primary-focus: #b39aff;
  --ca-semantic-error: #ef5350;
  --ca-semantic-success: #3dd68c;
  --ca-semantic-warning: #f9b44e;
}

/* Typography */
:root {
  --ca-font-primary: "APK Protocol", system-ui, sans-serif;
  --ca-text-display: 60px;
  --ca-text-body: 14px;
  --ca-text-small: 16px;
  --ca-text-button: 16px;
}

/* Spacing & Radius */
:root {
  --ca-space-xxs: 2px;
  --ca-space-xs: 8px;
  --ca-space-sm: 20px;
  --ca-space-md: 24px;
  --ca-space-base: 32px;
  --ca-space-lg: 40px;
  --ca-space-xl: 60px;
  --ca-space-2xl: 64px;
  --ca-space-3xl: 96px;
  --ca-radius-none: 0px;
  --ca-radius-xs: 4px;
  --ca-radius-sm: 8px;
  --ca-radius-md: 14px;
  --ca-radius-lg: 20px;
  --ca-radius-xl: 32px;
  --ca-radius-full: 9999px;
}

/* Motion */
:root {
  --ca-ease-out: cubic-bezier(0, 0, .2, 1);
  --ca-ease-smooth: cubic-bezier(.25,.8,.4,1);
  --ca-ease-fast: cubic-bezier(.45,.15,.6,.9);
  --ca-ease-in-out: cubic-bezier(.4, 0, .2, 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: hero
    tag: div
    height: 8121px
    width: full-bleed
    layout: block
    children: 1
    contains: chart/canvas (reproduce as live data-viz, not a flat image)
  - section: logo-strip
    tag: div
    classes: ["relative", "w-full", "z-50"]
    height: 81px
    width: full-bleed
    layout: block
    children: 2
  - section: header
    tag: header
    classes: ["wrapper", "px-6", "py-5", "flex"]
    height: 81px
    width: full-bleed
    layout: flex-row justify=space-between
    children: 2
    bg: "rgb(22, 23, 29)"
    tone: dark
    padding: "20px 24px"
  - section: hero
    tag: div
    classes: ["wrapper", "wrapper--ticks", "grid", "md:grid-cols-2"]
    height: 707px
    width: full-bleed
    layout: grid: 2-col gap=normal
    children: 2
    vertical-padding: ~40px
    contains: chart/canvas (reproduce as live data-viz, not a flat image)
  - section: section
    tag: section
    classes: ["wrapper", "wrapper--ticks", "border-t", "px-10"]
    height: 93px
    width: full-bleed
    layout: flex-column justify=center
    children: 1
    vertical-padding: ~32px
    padding: "32px 40px"
  - section: feature-section
    tag: section
    classes: ["wrapper", "border-t", "px-5", "sm:px-10"]
    height: 361px
    width: full-bleed
    layout: flex-column justify=center
    children: 2
    vertical-padding: ~112px (airy)
    padding: "112px 40px"
  - section: card-grid
    tag: section
    classes: ["wrapper", "wrapper--ticks", "border-t", "grid"]
    height: 1110px
    width: full-bleed
    layout: grid: 2-col gap=normal
    children: 4
    contains: chart/canvas (reproduce as live data-viz, not a flat image)
  - section: section
    tag: section
    classes: ["wrapper", "border-t", "px-5", "sm:px-10"]
    height: 321px
    width: full-bleed
    layout: flex-column justify=center
    children: 1
    vertical-padding: ~112px (airy)
    padding: "112px 40px"
  - section: card-grid
    tag: section
    classes: ["wrapper", "wrapper--ticks", "border-t", "grid"]
    height: 1056px
    width: full-bleed
    layout: grid: 2-col gap=normal
    children: 4
    vertical-padding: ~40px
    contains: chart/canvas (reproduce as live data-viz, not a flat image)
  - section: section
    tag: section
    classes: ["wrapper", "border-t", "px-5", "sm:px-10"]
    height: 321px
    width: full-bleed
    layout: flex-column justify=center
    children: 1
    vertical-padding: ~112px (airy)
    padding: "112px 40px"
  - section: section
    tag: section
    classes: ["wrapper", "wrapper--ticks", "border-t", "py-8"]
    height: 277px
    width: full-bleed
    layout: block
    children: 2
    vertical-padding: ~64px (generous)
    padding: "64px 40px"
  - section: feature-section
    tag: div
    classes: ["wrapper", "wrapper--ticks", "border-t", "pt-14"]
    height: 1042px
    width: full-bleed
    layout: block
    children: 2
    vertical-padding: ~60px (generous)
    padding: "120px 40px 0px"
  - section: feature-section
    tag: div
    classes: ["wrapper", "wrapper--ticks", "border-t", "py-14"]
    height: 473px
    width: full-bleed
    layout: block
    children: 1
    vertical-padding: ~120px (airy)
    padding: "120px 40px"
  - section: content-section
    tag: div
    classes: ["wrapper"]
    height: 1001px
    width: full-bleed
    layout: block
    children: 3
  - section: section
    tag: section
    classes: ["wrapper", "wrapper--ticks", "border-t", "h-16"]
    height: 120px
    width: full-bleed
    layout: block
    children: 0
  - section: footer
    tag: footer
    height: 1044px
    width: full-bleed
    layout: block
    children: 2
    bg: "rgb(22, 23, 29)"
    tone: dark
  - section: feature-section
    tag: section
    classes: ["wrapper"]
    height: 442px
    width: full-bleed
    layout: block
    children: 1
  - section: section
    tag: section
    classes: ["wrapper", "wrapper--ticks", "border-t"]
    height: 541px
    width: full-bleed
    layout: block
    children: 1
    vertical-padding: ~112px (airy)
```

**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:
    - "Redefining developer experience"
    - "A shared foundation to build upon"
    - "80k+"
  sub-headings:
    - "Loved by the community"
  ctas:
    - "Resources"
    - "Search Ctrl K"
    - "Get Started"
    - "Become a Sponsor"
  navigation:
    - "Guide"
    - "Config"
    - "Plugins"
  footer-links:
    - "Get Started"
    - "Guide"
    - "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: 17
    avg-ratio: 3.57
    common-aspect: "~16:6 banner"
    sample-alts:
      - "openai"
      - "shopify"
      - "stripe"
  hero:
    count: 2
    avg-ratio: 22.59
    common-aspect: "~16:6 banner"
    sample-alts:
      - "Frameworks powered by Vite"
  thumbnail:
    count: 10
    avg-ratio: 1.00
    common-aspect: "~1:1 square"
    sample-alts:
      - "Vite icon"
      - "Ryan Carniato"
      - "Rich Harris"
```

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

### Generic Card
```html
<div class="card">
  <!-- content -->
</div>
```
_Source pattern detected: padding `40px 32px` · radius `8px` · shadow `none`_

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


## 17. Content Architecture & Resources (Links by Purpose)

*The page's links classified by purpose — the information architecture to reproduce. Categories, featured images, devices and projects are extracted from the rendered DOM, not guessed.*

**By purpose:** **nav** 6 · **cta** 1 · **docs** 2 · **blog** 2 · **social** 8 · **footer** 10 · **other** 20

**Primary actions (conversion path):**
- Primary call-to-action — "Get Started" (the conversion path) → `https://vite.dev/guide/`

**Projects / case studies detected** (clustered by URL + featured image):

*Vitejs* — medium confidence, 2 items:

| Title | Featured image | Link |
|---|---|---|
| Vite | — | https://github.com/vitejs/vite |
| Releases | — | https://github.com/vitejs/vite/releases |

**Signals:** 33/49 links carry a featured image · device mockups detected: laptop ×1 · dominant link roles: content-card (25), footer-link (14), navigation (6).


---
## Extraction Completeness: 87/100 (B)

| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 17 | 25 | 12 named colors |
| Typography | 20 | 20 | 8 roles defined |
| Components | 20 | 20 | 6 specs extracted |
| Motion & Interaction | 15 | 15 | Keyframes, easing vars |
| CSS Custom Properties | 10 | 10 | 407 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.

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

- **Licensed web fonts (APK Protocol, KH Teka Mono, Inter)** — detected but not downloaded. Substitute with your licensed copy or a close fallback (see Typography section for metrics).

| Category | What's missing | Fallback strategy |
|----------|----------------|-------------------|
| **Hero imagery** | No dominant hero image detected above the fold | Use the canonical brand visual from §9b (OG image) for hero composition |
| **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 | 407 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 8 typography roles inferred |
| §4 Components | High | 6 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 23 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 6 breakpoints detected |
| §9b Photography | Medium | 19 images, hero not detected |

## 11.1 CSS Implementation Guide (CSS Interception Engine v2.15+)

*Ready-to-use CSS from Prism's CSS Interception Engine — intercepted directly from the site's CSS files (bypasses CORS). Copy-paste into your `<style>` block.*

### Font Loading

4 font file(s) captured (183KB total). When running `prism add`, fonts are saved to `extractions/vitejs.dev/fonts/` and embedded as base64 in the output HTML.

**@font-face declarations to use:**
```css
@font-face {
  font-family: 'APK Protocol';
  /* src: url('/fonts/APK-Protocol.woff2') format('woff2'); */
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'APK Protocol';
  /* src: url('/fonts/APK-Protocol.woff2') format('woff2'); */
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'KH Teka Mono';
  /* src: url('/fonts/KH-Teka-Mono.woff2') format('woff2'); */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'KH Teka Mono';
  /* src: url('/fonts/KH-Teka-Mono.woff2') format('woff2'); */
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  /* src: url('/fonts/Inter.woff2') format('woff2'); */
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Inter';
  /* src: url('/fonts/Inter.woff2') format('woff2'); */
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: 'Punctuation SC';
  /* src: url('/fonts/Punctuation-SC.woff2') format('woff'); */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Punctuation SC';
  /* src: url('/fonts/Punctuation-SC.woff2') format('woff'); */
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Punctuation SC';
  /* src: url('/fonts/Punctuation-SC.woff2') format('woff'); */
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Punctuation SC';
  /* src: url('/fonts/Punctuation-SC.woff2') format('woff'); */
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
```

### Keyframe Animations (Intercepted from CSS)

**9 @keyframes found** — these are the real animation definitions:

```
@keyframes fadeIn-d05aa6b7 { ... }
@keyframes move-background { ... }
@keyframes scroll-horizontal-0d857a7f { ... }
@keyframes event-card-hover { ... }
@keyframes fade-in { ... }
@keyframes slideDown { ... }
@keyframes shimmerText { ... }
@keyframes fadeIn { ... }
@keyframes pulse { ... }
```

<details><summary>Full keyframes CSS (9 animations)</summary>

```css
@keyframes fadeIn-d05aa6b7{0%{opacity:0}
@keyframes move-background{0%,to{background-position:40% 40%}50%{background-position:60% 60%}}
@keyframes scroll-horizontal-0d857a7f{0%{transform:translate(0)}
@keyframes event-card-hover{0%{background-position:100% 200%}50%{background-position:-100% 200%}
@keyframes fade-in{0%{opacity:0}
@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}
@keyframes shimmerText{0%{background-position:200% 0}
@keyframes fadeIn{0%{opacity:0}
@keyframes pulse{0%,to{opacity:.3}50%{opacity:.6}}
```
</details>

### Brand Gradient Palette

**3 complex gradients captured** from the site's CSS. The first few are the most prominent visual decorations:

```css
/* Gradient 1 */
background: linear-gradient(90deg,#8c00ff8a 0% 38%,#ba189a94 48%,#f4563adb 60%,#fa7444fa 64% 100%);

/* Gradient 2 */
background: linear-gradient(transparent, var(--vp-local-search-result-bg);

/* Gradient 3 */
background: linear-gradient(90deg,#e0e3e8 0%,var(--docsearch-muted-color);

```

### Hover State CSS (Intercepted)

**1 hover rule lines** captured from CSS files. Key interactive transitions from real CSS (not inferred):

```css
.dep-item a[data-v-cdde475b]:hover{text-decoration:underline}

.authors-table .sponsor-link[data-v-cdde475b]:hover{text-decoration:underline}

.VPNavBarAskAiButton[data-v-4492443a]:hover{color:var(--vp-c-brand-1)}

.link.active[data-v-d97e860b],.link[data-v-d97e860b]:hover{color:var(--vp-c-brand-1)}

.link[data-v-d2f1d2aa]:hover{color:var(--vp-c-brand-1);background-color:var(--vp-c-default-soft)}

button[aria-expanded=true]+.menu[data-v-8dbacad0],.VPFlyout:hover .menu[data-v-8dbacad0]{display:block}

.VPSwitch[data-v-7597ae23]:hover{border-color:var(--vp-c-brand-1)}

.VPSocialLink[data-v-7a0bfc57]:hover{color:var(--vp-c-text-1);transition:color .25s}

.link[data-v-7753d7cf]:hover{border-color:var(--vp-c-brand-2);color:var(--vp-c-brand-2)}

.outline-link[data-v-26ac7b13]:hover,.outline-link.active[data-v-26ac7b13]{color:var(--vp-c-text-1);transition:color .25s}

.edit-link-button[data-v-1311d8f4]:hover{color:var(--vp-c-brand-2)}

.pager-link[data-v-1311d8f4]:hover{border-color:var(--vp-c-brand-1)}

.VPButton.brand[data-v-906679dd]:hover{border-color:var(--vp-button-brand-hover-border);color:var(--vp-button-brand-hover-text);background-color:var(--vp-button-brand-hover-bg)}

.VPButton.alt[data-v-906679dd]:hover{border-color:var(--vp-button-alt-hover-border);color:var(--vp-button-alt-hover-text);background-color:var(--vp-button-alt-hover-bg)}

.VPButton.sponsor[data-v-906679dd]:hover{border-color:var(--vp-button-sponsor-hover-border);color:var(--vp-button-sponsor-hover-text);background-color:var(--vp-button-sponsor-hover-bg)}

.VPFeature.link[data-v-28ffcec2]:hover{border-color:var(--vp-c-brand-1)}

.VPFooter[data-v-20d16048] a:hover{color:var(--vp-c-text-1)}

.VPLocalNavOutlineDropdown button[data-v-05bc48e0]:hover{color:var(--vp-c-text-1);transition:color .25s}

.menu[data-v-e7c88c0c]:hover{color:var(--vp-c-text-1);transition:color .25s}

.VPSidebarItem.level-0.is-link>.item>.link:hover .text[data-v-4ce3463c],.VPSidebarItem.level-1.is-link>.item>.link:hover .text[data-v-4ce3463c],.VPSidebarItem.level-2.is-link>.item>.link:hover .text[data-v-4ce3463c],.VPSidebarItem.level-3.is-link>.item>.link:hover .text[data-v-4ce3463c],.VPSidebarItem.level-4.is-link>.item>.link:hover .text[data-v-4ce3463c],.VPSidebarItem.level-5.is-link>.item>.link:hover .text[data-v-4ce3463c]{color:var(--vp-c-brand-1)}
```

> **Note**: All values above are extracted from the live site's CSS files. The font files are saved locally by Prism and embedded in the output HTML. Use them as-is for maximum fidelity.

## 11.2 Measured Reality (CDP Engine)

Captured directly from Chrome's engine across **all 635 rendered nodes** — not a sample. These are the values the page *actually paints*, weighted by how often they appear.

### Real Responsive Breakpoints
**12 breakpoints** read from the live `@media` rules (not guessed):
`375px` · `410px` · `550px` · `639px` · `640px` · `767px` · `768px` · `769px` · `960px` · `1024px` · `1280px` · `1440px`

### Measured Design Scale
**Type scale by usage** (× = paint count): `16px`×453 · `14px`×69 · `18px`×49 · `12px`×25 · `24px`×16 · `48px`×12 · `40px`×4 · `13px`×2

**Radius scale** (× = paint count): `8px`×39 · `4px`×11 · `2px`×10 · `11px`×2

**Weights** (× = paint count): `400`×558 · `500`×76

**Layout gaps** (× = paint count): `12px`×32 · `8px`×14 · `20px`×14 · `16px`×12 · `24px`×9 · `4px`×7 · `80px`×4 · `40px`×2

**Elevation (real shadows)**:
```css
rgb(0, 0, 0) 0px -1px 0px 0px inset
```

### Provenance — measured styles on key elements
Read from the live CSSOM (includes runtime-injected CSS). This is *what actually styles the page*, by element:

```css
body { background-color:var(--vp-c-bg) }
header { background-color:var(--color-white) }
header { background-color:var(--color-primary) }
h1 { font-family:var(--font-heading); font-size:var(--text-4xl); font-weight:var(--font-weight-medium); color:var(--color-primary) }
@media (width >= 40rem) h1 { font-size:var(--text-5xl) }
@media (width >= 48rem) h1 { font-size:var(--text-6xl) }
h1 { color:var(--color-white) }
h2 { font-family:var(--font-heading); font-size:var(--text-3xl); font-weight:var(--font-weight-medium); color:var(--color-primary) }
@media (width >= 48rem) h2 { font-size:var(--text-5xl) }
h2 { color:var(--color-white) }
button { color:var(--color-white) }
a { color:var(--color-white) }
```

> Selectors normalised to their semantic element — source class names are often build-hashed (`.bgDIHX`) and not reusable. The declarations + CSS vars are the transferable part.

---
*Generated by Prism — automated Playwright extraction + design analysis.*
*Source: https://vitejs.dev | 2026-06-11T06:20:37.052Z*
*Values extracted via getComputedStyle() (rendered) + CSS custom properties (tokens, marked `(token)`). Token-only values may not be painted — verify against the live site before shipping.*