--- version: alpha name: storybook.js.org description: "Light product system built on #ffffff with #ffffff as the primary CTA accent. Type anchored in __Nunito_Sans_ee04dc at 56px / weight 700. Extracted automatically from https://storybook.js.org/ — rendered styles via getComputedStyle() + CSS custom properties (token-only values may not be painted)." narrative: | storybook.js.org is built on a pure-white canvas (rgb(255, 255, 255)). The system uses rgb(255, 255, 255) as the singular interactive color. Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside __Nunito_Sans_ee04dc as the primary typeface. A restrained elevation system (3 distinct shadows) — shadows reserved for the few elements that must lift off the page. Motion is a first-class concern — 9 keyframe animations plus transition-driven interactions. colors: background: "#ffffff" surface-1: "#ffffff" surface-2: "rgba(255, 255, 255, 0.6)" ink-subtle: "#969faf" primary: "#ffffff" on-primary: "#111111" primary-hover: "#ff4785" hairline: "rgba(255, 255, 255, 0.2)" primary-focus: "#5468ff" typography: display-xl: fontFamily: "__Nunito_Sans_ee04dc, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif" fontSize: 56px fontWeight: 700 lineHeight: 1.25 letterSpacing: 0 display-md: fontFamily: "__Nunito_Sans_ee04dc, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif" fontSize: 24px fontWeight: 700 lineHeight: 1.33 letterSpacing: 0 body: fontFamily: "__Nunito_Sans_ee04dc, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif" fontSize: 16px fontWeight: 400 lineHeight: 1.5 letterSpacing: 0 body-sm: fontFamily: "__Nunito_Sans_ee04dc, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif" fontSize: 12px fontWeight: 400 lineHeight: 1.33 letterSpacing: 0 button: fontFamily: "__Nunito_Sans_ee04dc, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif" fontSize: 16px fontWeight: 500 lineHeight: 1.5 letterSpacing: 0 rounded: none: 0px xs: 4px sm: 8px md: 12px lg: 9999px xl: 10007px pill: 9999px spacing: xxs: 2px xs: 6px sm: 8px md: 12px lg: 20px xl: 32px xxl: 56px components: button-pill: backgroundColor: "transparent" textColor: "{colors.hairline}" typography: "{typography.body}" rounded: "{rounded.lg}" padding: 0px 12px button-ghost: backgroundColor: "transparent" textColor: "#000000" typography: "{typography.body}" rounded: "{rounded.none}" padding: 0px 12px button-ghost-2: backgroundColor: "transparent" textColor: "{colors.hairline}" typography: "{typography.body}" rounded: "{rounded.xs}" padding: 0px 8px input-text-input: backgroundColor: "{colors.hairline}" textColor: "#27272a" typography: "{typography.body}" rounded: "{rounded.xs}" padding: 0px 100px 0px 16px extracted_at: "2026-06-11T06:18:23.559Z" completeness: 69 scoreVersion: "v2" --- # Design System — storybook.js.org > Extracted automatically by Prism from https://storybook.js.org > 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**: moderate  |  **Motion**: expressive  |  **Weight**: heavy  |  **Aesthetic**: soft-rounded | Dimension | Value | Signal | |---|---|---| | Canvas | neutral | `#ffffff` | | Type posture | sans-led (__Nunito_Sans_ee04dc) | "Build, test & document compone" | | Color assertion | dual-accent | #ffffff | | Whitespace | moderate | section rhythm 48px | | Interaction | expressive | 9 keyframes, 6 transitions | | Radius language | soft-pill | from token scale | **Prism fingerprint**: `neutral-canvas · sans-display · dual-accent · soft-pill · expressive-motion` > **🤖 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(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**: 48px between major bands. Card padding: 20px. > - **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 storybook.js.org uses a pure-white canvas (`#ffffff`), letting typography, color and imagery carry the visual weight. Typography is anchored in **__Nunito_Sans_ee04dc**. Headlines use weight 700 for confident, assertive presence — the brand wants to be heard. Body text reads in Pure Black (`#000000`) (contrast ratio 21.0:1, well above WCAG AA). **Pure White** (`#ffffff`) provides interactive distinction without visual aggression. Elevation comes from a small, deliberate set of shadows (3 distinct), each a multi-layer stack — several blurred layers at varying offsets — used sparingly rather than across the whole UI. Border radius varies from pill-shaped (fully rounded) to moderately rounded elements, creating visual rhythm. Motion design uses smooth easing curves for polished state transitions. **Key Characteristics:** - Background: Pure White (`#ffffff`) - Primary typeface: __Nunito_Sans_ee04dc - Accent: Pure White (`#ffffff`) - Display: 56px weight 700 - Shadow system: 3 distinct elevation levels ## 2. Color Palette & Roles ### Background & Surface - **Pure White** (`#ffffff`): Page background (primary) - **Whitesmoke** (`#e5e7eb`): Surface / elevated background - **Off-White** (`#f7f9fc`): Surface / elevated background - **Light Gray** (`#d9e0e6`): Surface / elevated background - **Whitesmoke** (`#d8dddd`): Surface / elevated background ### Text & Content - **Pure Black** (`#000000`): Primary body text - **Deep Navy** (`#0d1026`): Secondary text - **Charcoal** (`#333333`): Secondary text - **Charcoal** (`#3d3d40`): Secondary text - **Charcoal** (`#2e3438`): Secondary text ### Accent & Interactive - **#ff4785** (`#ff4785`): Interactive / accent - **Vermillion** (`#ef4444`): Interactive / accent - **Amber** (`#eab308`): Interactive / accent - **#22c55e** (`#22c55e`): Interactive / accent - **Medium Gray** (`#73828c`): Interactive / accent - **Amber** (`#ffae00`): Interactive / accent - **Sky Bright** (`#029cfd`): Interactive / accent ### Border & Divider - **Light Blue** (`#cbd5e1`): Borders / dividers - **Light Grey** (`#babec2`): Borders / dividers - **Light Gray** (`#e2e8f0`): Borders / dividers - **Light Grey** (`#d4d4d8`): Borders / dividers - **Whitesmoke** (`#e4e4e7`): Borders / dividers ### Full Extracted Palette **79 colors rendered on the page** + **15** more declared in design tokens (CSS custom properties — not necessarily painted). (22 categorized above + 72 additional below.) Rendered values are read via `getComputedStyle()`; token values come from CSS variable declarations. Third-party logo colors are filtered out. - `#37d5d3` — #37d5d3 - `#6f2cac` — #6f2cac - `#f4c039` — #f4c039 - `#979b9b` — Grey - `#666d82` — Slate Gray - `#76828b` — Medium Gray - `#7abf39` — #7abf39 - `#818386` — Slate Grey - `#0271b6` — #0271b6 - `#1f99e5` — Sky Bright - `#16b242` — Success Green - `#5f5f5f` — Slate Grey - `#fc8047` — Coral - `#52525b` — Charcoal - `#3f3f46` — Charcoal - `#00d8ff` — #00d8ff - `#4dba87` — #4dba87 - `#435466` — Slate - `#dd0031` — Crimson - `#c3002f` — #c3002f - `#166da5` — #166da5 - `#8fdb69` — #8fdb69 - `#e44d26` — Vermillion - `#f16529` — #f16529 - `#ebebeb` — Whitesmoke - `#a1a1aa` — Grey - `#232a35` — Charcoal - `#71717a` — Slate Grey - `#fddd9c` — #fddd9c - `#79c9fc` — Baby Blue - `#1ea7fd` — Sky Bright - `#a849ff` — #a849ff - *…+40 more in `raw-css.json` (`desktop.allColors`).* ### Gradients & Decorative Fills - `linear-gradient(-225deg,#d5dbe4,#f8f8f8)` — (--docsearch-key-gradient) - `linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), conic-gradient(from 88.4565deg, rgb(71, 145…` — (badge) ### CSS Custom Properties (Design Tokens) **Shadow Token** - `--tw-ring-offset-shadow`: `0 0 #0000` - `--tw-ring-shadow`: `0 0 #0000` - `--tw-drop-shadow`: `` - `--docsearch-modal-shadow`: `inset 1px 1px 0 0 hsla(0,0%,100%,.5),0 3px 8px 0 #555a64` **Spacing Token** - `--tw-numeric-spacing`: `` - `--tw-border-spacing-x`: `0` - `--docsearch-spacing`: `12px` - `--tw-border-spacing-y`: `0` **Other tokens** - `--docsearch-primary-color`: `#5468ff` - `--tw-ring-color`: `rgba(2,156,253,.5)` - `--docsearch-logo-color`: `#5468ff` - `--tw-ring-offset-color`: `#fff` - `--docsearch-hit-active-color`: `#fff` - `--docsearch-text-color`: `#1c1e21` - `--docsearch-muted-color`: `#969faf` - `--docsearch-hit-color`: `#444950` ## 3. Typography Rules ### Font Families - **Primary**: `ui-monospace` ### Custom Fonts Loaded - **__Nunito_Sans_ee04dc** weight 200 1000 (normal) ### Typography Hierarchy | Role | Font | Size | Weight | Line Height | Letter Spacing | Notes | |------|------|------|--------|-------------|----------------|-------| | Display Hero | __Nunito_Sans_ee04dc | 56px | 700 | 1.25 | normal | Main headline (h1) | | Sub-heading | __Nunito_Sans_ee04dc | 24px | 700 | 1.33 | normal | Third-level heading (h3) | | Body | __Nunito_Sans_ee04dc | 16px | 400 | 1.5 | normal | Standard reading text | | Button Large | __Nunito_Sans_ee04dc | 16px | 500 | 1.5 | normal | Button label (16px) | | Button | __Nunito_Sans_ee04dc | 14px | 700 | 1.43 | normal | Button label (14px) | | Link Small | __Nunito_Sans_ee04dc | 12px | 400 | 1.33 | normal | Link (12px) — Decoration: none | ### Full Font Size Scale Sizes detected in the design (descending): `56px`, `24px`, `20px`, `16px`, `14px`, `13px`, `12px`, `11px` > 3 size(s) detected outside the sampled hierarchy (20px, 13px, 11px). These appear on elements not in the sampled set — likely additional display sizes, marketing-section overrides, or third-party-widget styles. ## 4. Component Stylings ### Buttons **Pill** - Background: `transparent` - Text: `#ffffff` `{colors.hairline}` - Padding: 0px 12px - Radius: 9999px - Border: 1px solid rgba(255, 255, 255, 0.3) - Font: 16px weight 500 - Use: Status pills, tags, chips - Hover: border: `1px solid rgba(255, 255, 255, 0.32)`, borderColor: `#ffffff` - Focus: boxShadow: `rgb(84, 104, 255) 0px 0px 0px 2px inset` **Ghost** - Background: `transparent` - Text: `#000000` - Padding: 0px 12px - Radius: 0px - Font: 16px weight 400 - Use: Subtle action, toolbar, nav button - Hover: border: `1px solid rgba(255, 255, 255, 0.32)`, borderColor: `#ffffff` - Focus: boxShadow: `rgb(84, 104, 255) 0px 0px 0px 2px inset` **Ghost** - Background: `transparent` - Text: `#ffffff` `{colors.hairline}` - Padding: 0px 8px - Radius: 6px - Font: 14px weight 700 - Use: Subtle action, toolbar, nav button - Hover: border: `1px solid rgba(255, 255, 255, 0.32)`, borderColor: `#ffffff` - Focus: boxShadow: `rgb(84, 104, 255) 0px 0px 0px 2px inset` **Pill** - Background: `transparent` - Text: `#ffffff` `{colors.hairline}` - Padding: 0px 24px - Radius: 9999px - Border: 1px solid rgb(255, 255, 255) - Font: 16px weight 700 - Use: Status pills, tags, chips - Hover: border: `1px solid rgba(255, 255, 255, 0.32)`, borderColor: `#ffffff` - Focus: boxShadow: `rgb(84, 104, 255) 0px 0px 0px 2px inset` ### Inputs & Forms **Text Input** - Background: `#ffffff` `{colors.hairline}` - Text: `#27272a` - Padding: 0px 100px 0px 16px - Radius: 6px - Border: 1px solid rgb(228, 228, 231) - Font: 16px weight 400 - Use: Text fields, search inputs - Focus: outline: `rgb(16, 16, 16) auto 1px` ## 4b. Component Behaviors (State Matrix) ### Interaction State Narrative - **Button**: - **hover:** shadow added, border changes - **focus:** shadow added - **FooterLink**: - **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)" border: "1px solid rgba(255, 255, 255, 0.3)" hover: bg: "transparent" fg: "inherit" border: "1px solid rgba(255, 255, 255, 0.32)" focus: bg: "transparent" fg: "inherit" shadow: "rgb(84, 104, 255) 0px 0px 0px 2px inset" input: default: bg: "rgb(255, 255, 255)" fg: "rgb(39, 39, 42)" border: "1px solid rgb(228, 228, 231)" focus: bg: "transparent" fg: "inherit" link: default: bg: "rgba(0, 0, 0, 0)" fg: "rgb(0, 0, 0)" navLink: default: bg: "rgba(0, 0, 0, 0)" fg: "rgb(0, 0, 0)" badge: default: bg: "rgba(0, 0, 0, 0)" fg: "rgb(255, 255, 255)" border: "1px solid rgba(0, 0, 0, 0)" footerLink: default: bg: "rgba(0, 0, 0, 0)" fg: "rgb(255, 255, 255)" border: "1px solid rgb(63, 63, 70)" 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 - **2 shape(s)** in this system: `Pill`, `Ghost` - **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 ## 5. Layout Principles ### Layout Type **top-nav + content** ### Grid Single column, centered content ### Max Width 1200px ### Spacing System Compact spacing — information density prioritized | Token | Value | |-------|-------| | xxs | 2px | | xs | 6px | | sm | 8px | | md | 12px | | base | 16px | | lg | 20px | | xl | 32px | | 2xl | 48px | | 3xl | 56px | ### Border Radius Scale | Name | Value | Use | |------|-------|-----| | None | 0px | No rounding | | Xs | 4px | Tiny corners (badges, micro elements) | | Sm | 8px | Buttons, inputs, small elements | | Md | 12px | Cards, containers | | Lg | 9999px | Large rounded elements, pill segments | | Xl | 10007px | Category strips, featured containers | | Full | 9999px | Pills, avatars, circular elements | ### Shape Language | Component | Border Radius | |-----------|---------------| | Buttons | `9999px` | | Inputs & Forms | `6px` | | Page Body | `0px` | | Navigation | `0px` | | Primary Input | `6px` | **Shape Personality**: Sharp + Pill Contrast — Angular precision with pill-shaped accents (status badges, tags). Creates strong visual hierarchy. **Full Radius Spectrum**: 0px, 2px, 4px, 6px, 8px, 12px, full/pill (from `allBorderRadii` scan) ## 5b. Spacing Rhythm Names **Measured section padding**: bands use ~56px internal vertical padding (up to 318px) — **standard**. (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** | `56px` | Top/bottom of full-bleed hero sections | | **section** | `32px` | Between major bands (color change, content shift) | | **subsection** | `20px` | Within a section, between content groups | | **card** | `12px` | Card padding, list-item spacing | | **compact** | `8px` | 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). **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:** "Build, test & document components" — 56px left-aligned - **Subheading:** "Storybook is a frontend workshop for building UI components and pages in isolation. Thousands of teams use it for UI development, testing, and documen" - **Media:** present, positioned top - **CTAs:** 3 (primary: "Introducing MCP for React") - **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:** 32px - **Logo:** ✓ present - **Nav links:** 7 primary items - **CTAs in nav:** 0 (no buttons — links only) - **Clone instruction:** Build a static unknown navigation. Link-only — no button styling needed. ### Card Grid Pattern - **Card count:** 3 cards detected - **Columns (desktop):** 1-up grid - **Card dimensions:** 1233×1233px (aspect 1:1) - **Gap:** 0px between cards - **Content:** ✗ no image - **Clone instruction:** Build a 1-column grid (desktop) with cards at ~1:1 aspect ratio. Text/icon-only cards (no photography). ### Testimonial Pattern - **Count:** 4 testimonial blocks - **Layout:** grid - **Avg quote length:** 160 chars (medium quote) - **Includes:** ✗ no avatars | ✗ no logos | ✗ no ratings - **Clone instruction:** Build a grid of 4 testimonials. ### Footer Pattern - **Columns:** 1 - **Links:** 19 total - **Height:** 541px - **Includes:** ✓ newsletter signup | ✓ social icons | - **Clone instruction:** Build a 1-column footer with ~19 links per column, newsletter signup, social media links. ## 6. Depth & Elevation | Level | Treatment | Use | |-------|-----------|-----| | Flat (Level 0) | No shadow | Page background, content blocks | | Layered (Level 1) |
`rgba(0, 0, 0, 0.1) 0px 4px 6px -1px`,
`rgba(0, 0, 0, 0.1) 0px 2px 4px -2px` | Cards, elevated surfaces | | Layered (Level 2) |
`rgba(0, 0, 0, 0.05) 0px 1px 2px 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 | |-------|---------------| | `cubic-bezier(0.4,0,0.2,1)` | Material Standard — Balanced | ### Duration Scale | Value | Tier | Typical Use | |-------|------|-------------| | `150ms` | Fast | Hover states, micro-interactions | | `200ms` | Normal | Panel open/close, navigation | | `300ms` | Normal | Panel open/close, navigation | ### Copy-Paste Transition Snippets **All Props** ```css transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1); ``` **Color / Background** ```css transition: color 0.15s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.15s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.15s cub...; ``` **All Props** ```css transition: 0.15s cubic-bezier(0.4, 0, 0.2, 1); ``` **All Props** ```css transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1); ``` ### Keyframe Animation Catalog | Animation Name | Type | Animated Props | Use Hint | |----------------|------|----------------|----------| | `fade-in` | Fade | opacity | Element entrance | | `enter` | Fade + Move | opacity, transform | Element entrance | | `exit` | Fade + Move | opacity, transform | Element exit | | `slideUpAndFade` | Fade + Move | opacity, transform | Panel / drawer enter | | `slideRightAndFade` | Fade + Move | opacity, transform | UI transition | | `slideLeftAndFade` | Fade + Move | opacity, transform | UI transition | | `slideDownAndFade` | Fade + Move | opacity, transform | Panel / drawer enter | | `ui-gradient-badge-rotate` | Custom | --gradient-badge-angle | Loading indicator | | `ui-slideUpAndFade` | Fade + Move | opacity, transform | Panel / drawer enter | ### Motion Fingerprint - **Speed Character**: Balanced Pacing (median duration: `200ms`) - **Dominant Easing**: custom cubic-bezier curves - **Animation Library**: 9 unique animations (9 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 the extracted shadow patterns for elevation — they are tuned to match the brand palette - Use full-pill radius (9999px) only for specific elements (avatars, pills, toggles) - Use Pure White (`#ffffff`) 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 - Style form inputs with a `1px solid rgb(228, 228, 231)` border — use border-based inputs, not floating labels or underline-only - Make the hero full-viewport (≥70% screen height) — this design uses an immersive hero, not a tall navbar - Include exactly 3 CTAs in the hero (primary + secondary) — this design pattern is multi-action, not single-purpose - Lay out testimonials in a grid (4+ items) — quantity signals scale and trust - Include a newsletter signup in the footer — email capture is part of the conversion funnel ### Don't - Don't invent new shadow values — use only the extracted shadow levels - Don't apply pill radius on rectangular buttons or cards — it's reserved for specific interactive elements - Don't introduce additional saturated accent colors — the palette is intentionally controlled - Don't remove the input border — the border is the primary affordance indicator for form fields - 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(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 | 360px | Single column, compact spacing | | Mobile Large | 640px | Expanded mobile layout | | Tablet | 768px | Multi-column grids begin | | Tablet | 1024px | Multi-column grids begin | | Desktop | 1120px | Full feature layout | | Desktop | 1280px | Full feature layout | | Large Desktop | 1416px | Maximum content width | ### Token Diff — Desktop vs Mobile | Element | Property | Desktop | Mobile | |---------|----------|---------|--------| | heading | font-size | `56px` | `36px` | | heading | line-height | `70px` | `40px` | | nav | display | `block` | `none` | | nav | height | `32px` | `auto` | | button | width | `176px` | `100%` | ### Collapsing Strategy - Headlines: 56px → 36px on mobile - Navigation: block → none on mobile - Cards: multi-column → stacked vertical on mobile - Footer: multi-column → stacked single column on mobile ### Touch Targets - Buttons: 0px 12px 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 CTAs:** 3 on desktop → 2 on mobile (secondary CTAs dropped on small screens). ## 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.* - **Mesh gradients** — 1 multi-stop organic color field(s) as background atmosphere. - **Clip-path shapes** — 1 non-rectangular cut(s). - **CSS-variable animations** (3) — animated custom properties. > **Motion fingerprint**: mesh gradients, non-rectangular shapes (1) ## 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://storybook.js.org/opengraph-image.jpg?841db310ba5a3a1e (1200×630px) *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): 18 (35%) - Portrait (<0.87): 3 (6%) - Square (0.87–1.15): 30 (59%) **Media Format Mix:** - WebP: 8 (optimized photo/illustration hybrid) - PNG: 4 (logos, transparent UI elements, mockups) - SVG: 41 (icons, illustrations, decorative geometry) **Average rendered image size:** 259×225px **Above-fold image count:** 0 / 51 **Decorative Patterns Detected:** - 2 multi-stop linear gradients (mesh-like, 3+ color stops) — the brand leans on rich color transitions for visual depth - 15 radial gradients — circular color blooms used for spotlight/glow effects - 2 large decorative SVG shapes (≥200×200px, non-icon) — likely blob/illustration accents - 3 background patterns (non-photo url() backgrounds) — textures/illustrations as backdrops **Clone instruction for decorative work:** This is a gradient-rich design — invest in multi-stop CSS gradients (3+ color stops), not solid backgrounds. **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: Pure White (`#ffffff`) - Primary text: Pure Black (`#000000`) - Accent: Pure White (`#ffffff`) - Border: Translucent Pure White (20%) (`rgba(255, 255, 255, 0.2)`) - Font: __Nunito_Sans_ee04dc - Body: 16px weight 400 ### Example Component Prompts - "Create a hero section on Pure White background (#ffffff). Headline at 56px __Nunito_Sans_ee04dc weight 700, line-height 1.25, color #000000." - "Create the primary CTA button: `#ffffff` background, `#ffffff` text, 9999px border-radius, 0px 12px padding, 500 weight, __Nunito_Sans_ee04dc font." - "Build navigation: static on `#ffffff`. __Nunito_Sans_ee04dc 16px weight 400 for links." ### Iteration Guide 1. **Canvas**: Set the light canvas to Pure White (`#ffffff`) — every component is composited against this exact base. 2. **Typography**: All type in __Nunito_Sans_ee04dc, weight range 400–700. Never exceed 700 — heavier weights break the brand's tonal restraint. 3. **Accent**: Pure White (`#ffffff`) is the sole interactive color. On hover → #ff4785 (`#ff4785`). Use CSS transitions, not opacity/brightness filters. 4. **Motion**: All transitions use `cubic-bezier(0.4,0,0.2,1)`. Never use linear for UI transitions — preserve the brand's easing personality. 5. **Shape**: CTAs 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-hairline: #ffffff; --ca-ink-subtle: #969faf; --ca-on-primary: #111111; --ca-primary-hover: #ff4785; --ca-primary-focus: #5468ff; } /* Typography */ :root { --ca-font-primary: "__Nunito_Sans_ee04dc", system-ui, sans-serif; --ca-text-display: 56px; --ca-text-body: 16px; --ca-text-small: 12px; --ca-text-button: 16px; } /* Spacing & Radius */ :root { --ca-space-xxs: 2px; --ca-space-xs: 6px; --ca-space-sm: 8px; --ca-space-md: 12px; --ca-space-base: 16px; --ca-space-lg: 20px; --ca-space-xl: 32px; --ca-space-2xl: 48px; --ca-space-3xl: 56px; --ca-radius-none: 0px; --ca-radius-xs: 4px; --ca-radius-sm: 8px; --ca-radius-md: 12px; --ca-radius-lg: 9999px; --ca-radius-xl: 10007px; --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: hero tag: div classes: ["relative"] height: 15030px width: full-bleed layout: block children: 2 bg: "rgb(13, 16, 38)" tone: dark - section: hero tag: div classes: ["ui-mx-auto", "ui-px-4", "sm:ui-px-8", "ui-max-w-8xl"] height: 1622px width: full-bleed layout: block children: 7 vertical-padding: ~48px padding: "96px 32px 0px" - section: feature-section tag: section classes: ["border-b", "border-zinc-700", "pt-[calc(3rem-40px)]", "sm:pt-[calc(5rem-40px)]"] height: 4911px width: full-bleed layout: block children: 4 padding: "40px 0px 0px" - section: feature-section tag: div classes: ["ui-mx-auto", "ui-px-4", "sm:ui-px-8", "ui-max-w-8xl"] height: 168px width: full-bleed layout: flex-row justify=space-between children: 2 padding: "0px 32px" - section: unknown tag: figure classes: ["sticky", "top-[34%]", "z-[999]", "-order-1"] height: 636px width: 920px layout: block children: 1 vertical-padding: ~318px (airy) - section: feature-section tag: div classes: ["ui-mx-auto", "ui-px-4", "sm:ui-px-8", "ui-max-w-8xl"] height: 722px width: full-bleed layout: grid: 2-col gap=96px children: 2 vertical-padding: ~56px (generous) padding: "112px 32px 0px" - section: content-section tag: div classes: ["ui-mx-auto", "ui-px-4", "sm:ui-px-8", "ui-max-w-8xl"] height: 424px width: full-bleed layout: block children: 1 vertical-padding: ~112px (airy) padding: "0px 32px" - section: feature-section tag: div height: 1397px width: full-bleed layout: block children: 1 vertical-padding: ~56px (generous) - section: feature-section tag: div height: 1397px width: full-bleed layout: block children: 1 vertical-padding: ~56px (generous) - section: feature-section tag: div height: 2196px width: full-bleed layout: block children: 1 vertical-padding: ~56px (generous) - section: feature-section tag: div height: 1005px width: full-bleed layout: block children: 1 vertical-padding: ~96px (airy) - section: feature-section tag: div height: 1888px width: full-bleed layout: block children: 1 vertical-padding: ~56px (generous) - section: feature-section tag: section classes: ["pt-12", "sm:pt-20", "md:pt-28"] height: 1888px width: full-bleed layout: block children: 5 vertical-padding: ~56px (generous) padding: "112px 0px 0px" - section: footer tag: footer classes: ["ui-text-white", "ui-border-t", "border-zinc-700"] height: 541px width: full-bleed layout: block children: 1 bg: "rgb(13, 16, 38)" tone: dark vertical-padding: ~48px ``` **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: - "Develop durable user interfaces" - "Test UIs with less effort and no flake" - "Automate UI workflows" sub-headings: - "Build UI components and pages in isolation" ctas: - "Docs" - "89,935" - "Search docs K" - "Get Started" - "npm create storybook@latest" - "Development" - "Interaction testing" - "Learn about UI tests" navigation: - "Visual Test" - "Enterprise" - "89,935" - "Docs" - "AI" - "Addons" - "Showcase" - "Blog" - "Get Started" footer-links: - "Why Storybook" - "Netlify" ``` **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: 5 avg-ratio: 3.11 common-aspect: "~16:6 banner" sample-alts: - "EU" - "Github" - "Airbnb" editorial: count: 3 avg-ratio: 0.30 common-aspect: "~9:21 tall" thumbnail: count: 33 avg-ratio: 1.00 common-aspect: "~1:1 square" sample-alts: - "VSCode" - "Vite" - "Chromatic" ``` **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 ``` _Source pattern detected: padding `0px 12px` · radius `0px` · weight `400`_ **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** 5 · **cta** 1 · **docs** 14 · **blog** 3 · **project** 7 · **social** 10 · **footer** 12 · **other** 8 **Primary actions (conversion path):** - Primary call-to-action — "Get Started" (the conversion path) → `https://storybook.js.org/docs` **Projects / case studies detected** (clustered by URL + featured image): *Docs* — medium confidence, 11 items: | Title | Featured image | Link | |---|---|---| | /logo/react | — | https://storybook.js.org/docs/get-started/install/?renderer=react | | /logo/vue | — | https://storybook.js.org/docs/get-started/install/?renderer=vue | | /logo/angular | — | https://storybook.js.org/docs/get-started/install/?renderer=angular | | Install | — | https://storybook.js.org/docs/get-started/install/?renderer=web-components | | HTML5 Logo | — | https://storybook.js.org/docs/get-started/install/?renderer=html | | Why build UIs in isolation? | — | https://storybook.js.org/docs/get-started/why-storybook | | How to write a story | — | https://storybook.js.org/docs/get-started/whats-a-story | | Learn about UI tests | — | https://storybook.js.org/docs/writing-tests | *Showcase* — high confidence, 6 items: | Title | Featured image | Link | |---|---|---| | Polaris | `shopify.svg` (ar 3.57) | https://storybook.js.org/showcase/shopify-polaris-react | | Psammead | `bbc.svg` (ar 3.64) | https://storybook.js.org/showcase/bbc-psammead | | UI React | `audi.svg` (ar 2.93) | https://storybook.js.org/showcase/audi-ui-react | | Fluent UI Web Compnents | `fluent.svg` (ar 0.57) | https://storybook.js.org/showcase/microsoft-fluent-ui-web-components | | Gutenberg | `wordpress.svg` (ar 1) | https://storybook.js.org/showcase/wordpress-gutenberg | | Explorer 1 | `nasa.svg` (ar 3.57) | https://storybook.js.org/showcase/nasa-jpl-explorer-1 | *Storybookjs* — medium confidence, 2 items: | Title | Featured image | Link | |---|---|---| | 89,935 | — | https://github.com/storybookjs/storybook | | Version | `version.svg` (ar 1.34) | https://github.com/storybookjs/storybook/releases | **Signals:** 44/60 links carry a featured image · device mockups detected: phone ×1 · dominant link roles: footer-link (27), content-card (24), navigation (5). --- ## Extraction Completeness: 69/100 (C) | Category | Score | Max | Detail | |----------|-------|-----|--------| | Colors & Palette | 25 | 25 | 22 named colors | | Typography | 15 | 20 | 6 roles defined | | Components | 8 | 20 | 2 specs extracted | | Motion & Interaction | 12 | 15 | Keyframes | | CSS Custom Properties | 4 | 10 | 84 vars | | Responsive Breakpoints | 5 | 5 | 7 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 (__Nunito_Sans_ee04dc)** — detected but not downloaded. Substitute with your licensed copy or a close fallback (see Typography section for metrics). - **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. | 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 | | **Dark mode** | No dark-mode CSS variables or media queries detected | Light mode is canonical; do not generate dark-mode variants unless explicitly requested | ### Per-section confidence | Section | Confidence | Reason | |---------|------------|--------| | §1 Visual Theme | High | Body bg extracted via getComputedStyle() | | §2 Colors | High | 84 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 | 15 rules generated; design-decisions.json has evidence per rule | | §9 Responsive | High | 7 breakpoints detected | | §9b Photography | Medium | 51 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 `