langchain.com

DESIGN.md

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

---
version: alpha
name: langchain.com
description: "Light product system built on #f2faff with #e5f4ff as the primary CTA accent. Type anchored in Twklausanne at 56px / weight 300. Extracted automatically from https://langchain.com/ — rendered styles via getComputedStyle() + CSS custom properties (token-only values may not be painted)."
narrative: |
  langchain.com is built on a soft, near-white canvas (rgb(242, 250, 255)).
  The system uses rgb(229, 244, 255) as a near-neutral accent (low saturation).
  Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside Twklausanne as the primary typeface.
  A restrained elevation system (1 distinct shadow) — shadows reserved for the few elements that must lift off the page.
  Motion is minimal — a few targeted transitions, no decorative animation.

colors:
  background: "#f2faff"
  surface-1: "#ffffff"
  surface-2: "#e5f4ff"
  ink: "#cce9ff"
  ink-subtle: "#030710"
  primary: "#e5f4ff"
  on-primary: "#111111"
  primary-hover: "#cce9ff"
  hairline: "#262c36"
  semantic-error: "#b42318"
  semantic-success: "#027a48"

typography:
  display-xl:
    fontFamily: "Twklausanne, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 64px
    fontWeight: 300
    lineHeight: 1.1
    letterSpacing: -1.92px
  display-md:
    fontFamily: "Twklausanne, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 56px
    fontWeight: 300
    lineHeight: 1.1
    letterSpacing: -1.68px
  headline:
    fontFamily: "Twklausanne, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 32px
    fontWeight: 300
    lineHeight: 1.1
    letterSpacing: -0.96px
  body:
    fontFamily: "Aeonik, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1
    letterSpacing: 0
  button:
    fontFamily: "Aeonik, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1
    letterSpacing: 0

rounded:
  none: 0px
  xs: 4px
  sm: 8px
  md: 16px
  lg: 20px
  xl: 32px
  pill: 9999px

spacing:
  xxs: 2px
  xs: 8px
  sm: 10px
  md: 12px
  lg: 24px
  xl: 32px
  xxl: 64px

components:
  button-ghost:
    backgroundColor: "transparent"
    textColor: "{colors.primary-hover}"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 25.6px 10px
  button-light--invert:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.ink-subtle}"
    typography: "{typography.button}"
    rounded: "{rounded.xs}"
    padding: 12px 18px
  button-outline:
    backgroundColor: "transparent"
    textColor: "{colors.primary-hover}"
    typography: "{typography.button}"
    rounded: "{rounded.xs}"
    padding: 12px 18px
  card-standard-card:
    backgroundColor: "transparent"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 0px 0px 0px 120px
  input-text-input:
    backgroundColor: "{colors.ink-subtle}"
    textColor: "{colors.primary-hover}"
    typography: "{typography.button}"
    rounded: "{rounded.xs}"
    padding: 8px 18px
  navigation-main-nav:
    backgroundColor: "transparent"
    typography: "{typography.button}"
    rounded: "{rounded.none}"
    padding: 0px 43.1875px

extracted_at: "2026-06-11T05:45:43.811Z"
completeness: 76
scoreVersion: "v2"

---

# Design System — langchain.com
> Extracted automatically by Prism from https://langchain.com
> 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**: subtle  |  **Weight**: medium  |  **Aesthetic**: product-neutral

| Dimension | Value | Signal |
|---|---|---|
| Canvas | cool | `#f2faff` |
| Type posture | sans-led (Aeonik) | "Powering theAgent Development " |
| Color assertion | dual-accent | #e5f4ff |
| Whitespace | moderate | section rhythm 48px |
| Interaction | subtle | 2 keyframes, 4 transitions |
| Radius language | 6px-rounded | from token scale |

**Prism fingerprint**: `neutral-canvas · sans-display · dual-accent · 6px-rounded · subtle-motion`

> **🤖 TL;DR for AI agents** (read this first — saves you scanning the full doc):
>
> - **Canvas**: `rgb(242, 250, 255)` is the page background. Every component composits against this.
> - **Accent**: `rgb(229, 244, 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: 24px.
> - **Default radius**: 8px on buttons/inputs. Pills (`9999px`) only for icon-buttons or status chips.
>
> **Before generating UI**: import this DESIGN.md, scan §2 (Color Palette) + §4 (Components) + §10 (Agent Guide). Skip §11–12 unless extending.

## 1. Visual Theme & Atmosphere

**Signature:** a gradient wash in the hero. This is the brand's most recognizable visual — reproduce it, don't replace it with a generic card or flat panel.

langchain.com sits on a ghost white canvas (`#f2faff`), a neutral foundation calibrated for sustained reading and component contrast. 

Headlines are set in **Twklausanne**, a sans-serif display face (the dominant type signature, e.g. "Powering theAgent Development Lifecycle" at 56px). A second display voice — **Aeonik** (sans) — appears in lower bands (e.g. "Of the Fortune 10"), used for editorial accent. Body text is set in **Aeonik**. Headlines run at a remarkably light weight (300) — restraint over assertion, creating an editorial calm that invites reading rather than demanding it. Negative letter-spacing at display sizes (-1.68px at 56px) compresses headlines into engineered blocks, dense and precise. 

Body text reads in #cce9ff (`#cce9ff`). **Light Gray** (`#e5f4ff`) provides interactive distinction without visual aggression. Elevation comes from a small, deliberate set of shadows (1 distinct), each a multi-layer stack — several blurred layers at varying offsets — used sparingly rather than across the whole UI. 


**Key Characteristics:**
- Background: Ghost White (`#f2faff`)
- Primary typeface: Manrope
- Primary text: #cce9ff (`#cce9ff`)
- Accent: Light Gray (`#e5f4ff`)
- Display: 56px weight 300, letter-spacing -1.68px
- Shadow system: 1 distinct elevation levels
- Custom fonts loaded: Manrope, Museomoderno, Twklausanne, Aeonik, JetBrains Mono

## 2. Color Palette & Roles

### Background & Surface
- **Ghost White** (`#f2faff`): Page background (primary)
- **#cce9ff** (`#cce9ff`): Surface / elevated background
- **Pure White** (`#ffffff`): Surface / elevated background
- **Light Gray** (`#e5f4ff`): Surface / elevated background
- **Translucent Light Gray (16%)** (`rgba(224, 239, 254, 0.16)`): Surface / elevated background

### Text & Content
- **#cce9ff** (`#cce9ff`): Primary body text
- **Text Color  Text Success** (`#027a48`): Text (CSS var)
- **Text Color  Text Error** (`#b42318`): Text (CSS var)
- **Pure Black** (`#000000`): Secondary text
- **Jet Black** (`#030710`): Secondary text

### Accent & Interactive
- **M Tricolor Blue** (`#006ddd`): Interactive / accent
- **Slate** (`#2f4b68`): Interactive / accent
- **Baby Blue** (`#7fc8ff`): Interactive / accent
- **Baby Blue** (`#7ec7ff`): Interactive / accent
- **Light Blue** (`#b9e1ff`): Interactive / accent
- **Baby Blue** (`#91d0ff`): Interactive / accent
- **Baby Blue** (`#99d3ff`): Interactive / accent

### Border & Divider
- **Border Color  Border Secondary** (`#aaaaaa`): Border (CSS var)
- **Whitesmoke** (`#dddddd`): Borders / dividers

### Full Extracted Palette
**24 colors rendered on the page** + **29** more declared in design tokens (CSS custom properties — not necessarily painted). (18 categorized above + 35 additional below.)
Rendered values are read via `getComputedStyle()`; token values come from CSS variable declarations. Third-party logo colors are filtered out.

- `#262c36` — Charcoal
- `#161f34` — Deep Navy
- `#19222b` — Near Black
- `#9ed2fa` — Baby Blue
- `#7ec7fe` — Baby Blue
- `#7fc7ff` — Baby Blue
- `#f1e9ea` — Whitesmoke
- `#772730` — #772730
- `#ff0000` — Red
- `#fef3f2` — Warm Cream *(token)*
- `#f3cdbe` — Pink *(token)*
- `#0d1322` — Deep Navy *(token)*
- `#043e5d` — #043e5d *(token)*
- `#f8f7ff` — Off-White *(token)*
- `#e9ecec` — Whitesmoke *(token)*
- `#ecfdf3` — Off-Cream *(token)*
- `#d6bdc0` — Silver *(token)*
- `#076597` — #076597 *(token)*
- `#bbc4c4` — Light Grey *(token)*
- `#ebe8fe` — Light Gray *(token)*
- `#1d3d3c` — Charcoal *(token)*
- `#eaa990` — #eaa990 *(token)*
- `#beb4fd` — Lavender *(token)*
- `#b3d0df` — Light Blue *(token)*
- `#ba9195` — #ba9195 *(token)*
- `#fbeee9` — Warm Cream *(token)*
- `#84b3cd` — Sage *(token)*
- `#132d2d` — Warm Brown *(token)*
- `#40668d` — #40668d *(token)*
- `#cfc8fe` — Lavender *(token)*
- `#8b9c9c` — Cool Gray *(token)*
- `#d85522` — Vermillion *(token)*
- *…+3 more in `raw-css.json` (`desktop.allColors`).*

### CSS Custom Properties (Design Tokens)

- `--background-color--background-alternate`: `black`
- `--colors--violet--violet-200`: `#edeafdbf`
- `--_v-2-colors---c-blue-dark--400`: `#006ddd`
- `--border-color--border-primary`: `black`
- `--colors--orange--orange-200`: `#f3cdbe`
- `--_v-2-colors---c-blue-dark--800`: `#0d1322`
- `--colors--red--red-100`: `#f1e9ea`
- `--_v-2-colors---c-white--60-p`: `#fff9`
- `--_v-2-colors---c-blue-light--900`: `#7fc8ff`
- `--text-color--text-success`: `#027a48`
- `--colors--blue--blue-500`: `#043e5d`
- `--_v-2-colors---c-black--8p`: `#00000014`
- `--_v-2-colors---c-black--16-p`: `#03071029`
- `--colors--green--green-100`: `#e9ecec`
- `--text-color--text-secondary`: `black`

## 3. Typography Rules

### Font Families
- **Primary**: `Aeonik`
- **Secondary**: `Twklausanne`
- **Font 3**: `webflow-icons`
- **Font 4**: `Manrope`
- **Font 5**: `Museomoderno`

### Custom Fonts Loaded
- **webflow-icons** weight 400 (normal)
- **Manrope** weight 700 (normal)
- **Manrope** weight 500 (normal)
- **Manrope** weight 400 (normal)
- **Manrope** weight 200 (normal)
- **Manrope** weight 800 (normal)
- **Manrope** weight 600 (normal)
- **Manrope** weight 300 (normal)
- **Museomoderno** weight 600 (normal)
- **Twklausanne** weight 300 (normal)
- **Twklausanne** weight 700 (normal)
- **Aeonik** weight 400 (normal)
- **Twklausanne** weight 500 (normal)
- **Aeonik** weight 300 (normal)
- **JetBrains Mono** weight 300 (normal)
- **JetBrains Mono** weight 400 (normal)
- **JetBrains Mono** weight 500 (normal)
- **JetBrains Mono** weight 600 (normal)
- **JetBrains Mono** weight 700 (normal)

### Typography Hierarchy

| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | Twklausanne | 64px | 300 | 1.1 | -1.92px | Main headline (h2) |
| Sub-heading | Twklausanne | 56px | 300 | 1.1 | -1.68px | Third-level heading (h3) |
| Label Heading | Twklausanne | 32px | 300 | 1.1 | -0.96px | Small heading (H4) |
| Label Heading | Twklausanne | 24px | 300 | 1.1 | -0.72px | Small heading (H6) |
| Card Title | Aeonik | 16px | 400 | 1.5 | normal | Card headings |
| Button | Aeonik | 14px | 400 | 1 | normal | Button label (14px) |

### Full Font Size Scale

Sizes detected in the design (descending): `80px`, `64px`, `56px`, `48px`, `32px`, `24px`, `22.40px`, `19.20px`, `18px`, `16px`, `14px`

> 5 size(s) detected outside the sampled hierarchy (80px, 48px, 22.4px, 19.2px, 18px). These appear on elements not in the sampled set — likely additional display sizes, marketing-section overrides, or third-party-widget styles.

## 4. Component Stylings

### Buttons

**Ghost**
- Background: `transparent`
- Text: `#cce9ff` `{colors.primary-hover}`
- Padding: 25.6px 10px
- Radius: 0px
- Font: 16px weight 400
- Use: Subtle action, toolbar, nav button

**Light / Invert**
- Background: `#e5f4ff` `{colors.primary}`
- Text: `#030710` `{colors.ink-subtle}`
- Padding: 12px 18px
- Radius: 6px
- Font: 14px weight 400
- Use: Bright CTA on dark sections

**Outline**
- Background: `transparent`
- Text: `#cce9ff` `{colors.primary-hover}`
- Padding: 12px 18px
- Radius: 6px
- Border: 1px solid rgb(47, 75, 104)
- Font: 14px weight 400
- Use: Secondary action with border

**Dark / Solid**
- Background: `#030710` `{colors.ink-subtle}`
- Text: `#cce9ff` `{colors.primary-hover}`
- Padding: 12px 18px
- Radius: 6px
- Font: 14px weight 400
- Use: Solid dark CTA

**Icon Button**
- Background: `transparent`
- Text: `#030710` `{colors.ink-subtle}`
- Padding: 0px
- Radius: 6px
- Border: 1px solid rgba(47, 75, 104, 0.16)
- Font: 16px weight 400
- Use: Toolbar/UI icons

### Cards & Containers

**Standard Card**
- Background: `transparent`
- Padding: 0px 0px 0px 120px
- Radius: 0px
- Use: Content containers, listing items

### Inputs & Forms

**Text Input**
- Background: `#030710` `{colors.ink-subtle}`
- Text: `#cce9ff` `{colors.primary-hover}`
- Padding: 8px 18px
- Radius: 6px
- Border: 1px solid rgba(224, 239, 254, 0.16)
- Font: 14px weight 400
- Use: Text fields, search inputs

### Navigation

**Main Nav**
- Background: `transparent`
- Padding: 0px 43.1875px
- Radius: none
- Font: 16px weight 400
- Use: Fixed/sticky flex nav — N/A items


## 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(229, 244, 255)"
      fg: "rgb(3, 7, 16)"
  input:
    default:
      bg: "rgb(3, 7, 16)"
      fg: "rgb(204, 233, 255)"
      border: "1px solid rgba(224, 239, 254, 0.16)"
  link:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(242, 250, 255)"
  card:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(204, 233, 255)"
  navLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(204, 233, 255)"
  badge:
    default:
      bg: "rgba(255, 255, 255, 0.05)"
      fg: "rgb(127, 200, 255)"
      border: "1px solid rgba(255, 255, 255, 0.08)"
  footerLink:
    default:
      bg: "rgba(0, 0, 0, 0)"
      fg: "rgb(255, 255, 255)"
```

**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: `Ghost`, `Light / Invert`, `Outline`, `Dark / Solid`, `Icon Button`
- **DO NOT introduce new buttons variants** without justification

### Cards & Containers
- **1 shape(s)** in this system: `Standard Card`
- **DO NOT introduce new cards & containers variants** without justification

### Inputs & Forms
- **1 shape(s)** in this system: `Text Input`
- **DO NOT introduce new inputs & forms variants** without justification

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

## 5. Layout Principles

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

### Grid
Single column, centered content

### Max Width
1200px

### Spacing System
Compact spacing — information density prioritized

| Token | Value |
|-------|-------|
| xxs | 2px |
| xs | 8px |
| sm | 10px |
| md | 12px |
| base | 18px |
| lg | 24px |
| xl | 32px |
| 2xl | 48px |
| 3xl | 64px |

### Border Radius Scale
| Name | Value | Use |
|------|-------|-----|
| None | 0px | No rounding |
| Xs | 4px | Tiny corners (badges, micro elements) |
| Sm | 8px | Buttons, inputs, small elements |
| Md | 16px | 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 | `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, 4px, 6px, 8px, 16px, 19px, 20px, 32px (from `allBorderRadii` scan)


## 5b. Spacing Rhythm Names

**Measured section padding**: bands use ~64px internal vertical padding (up to 182px) — **generous**. (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** | `64px` | Top/bottom of full-bleed hero sections |
| **section** | `32px` | Between major bands (color change, content shift) |
| **subsection** | `24px` | Within a section, between content groups |
| **card** | `12px` | Card padding, list-item spacing |
| **compact** | `10px` | 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:** centered — Centered composition — heading + subheading + CTAs stacked vertically, content centered horizontally. Common for SaaS marketing pages.
- **Viewport coverage:** 434px tall (not full-viewport)
- **Heading:** "Powering theAgent Development Lifecycle" — 56px center-aligned
- **Subheading:** "Make experimentation repeatable, iterate faster, and gain momentum with LangSmith."
- **CTAs:** 2 (primary: "Start building")
- **Clone instruction:** Reproduce the **centered** 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:** 65px
- **Logo:** ✓ present
- **Nav links:** 2 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:** 6 cards detected
- **Columns (desktop):** 1-up grid
- **Card dimensions:** 1007×609px (aspect 1.65:1)
- **Gap:** 0px between cards
- **Content:** ✓ image + CTA
- **Image position:** top
- **Clone instruction:** Build a 1-column grid (desktop) with cards at ~1.65:1 aspect ratio. Each card has an image at the top.

### CTA Banner Pattern

- **Banner count:** 1
- **Position:** mid-page
- **Visual treatment:** ✓ contrasting background
- **Primary CTA text:** "More customer stories"
- **Clone instruction:** Place a single CTA banner mid-page. Use contrasting solid background.

### Footer Pattern

- **Columns:** 1
- **Links:** 29 total
- **Height:** 661px
- **Includes:** ✓ newsletter signup | ✓ social icons |  
- **Clone instruction:** Build a 1-column footer with ~29 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) | <br>`rgba(127, 200, 255, 0.5) 0px 0px 32px 0px` | Cards, elevated surfaces |

**Shadow Philosophy**: Multi-layered shadow system creating natural, atmospheric depth. Each shadow level combines multiple layers for realistic elevation.

## 7. Motion & Interaction

### Duration Scale

| Value | Tier | Typical Use |
|-------|------|-------------|
| `200ms` | Normal | Panel open/close, navigation |
| `300ms` | Normal | Panel open/close, navigation |

### Copy-Paste Transition Snippets

**Opacity**
```css
transition: opacity 0.3s;
```

### Keyframe Animation Catalog

| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `spin` | Rotate / Spin | transform | Loading indicator |
| `glowIn` | Custom | text-shadow | Attention / status |

### Motion Fingerprint

- **Speed Character**: Deliberate & Calm (median duration: `300ms`)
- **Dominant Easing**: standard CSS easings
- **Animation Library**: 2 unique animations (2 total including variants)

> This design moves with deliberate & calm timing using standard CSS easings, creating a UI that feels calm and controlled.

## 8. Do's and Don'ts

### Do
- Use Ghost White (`#f2faff`) as the page background — it's intentionally not pure white
- Use Aeonik as the primary typeface — it defines the brand personality
- Keep font weights between 300-400 — the system uses a narrow weight range for subtle hierarchy
- Use negative letter-spacing (-1.68px) at display sizes for compressed, editorial headlines
- Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
- Use Light Gray (`#e5f4ff`) 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 rgba(224, 239, 254, 0.16)` border — use border-based inputs, not floating labels or underline-only
- Maintain nav height at 65.1875px — 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
- Include a newsletter signup in the footer — email capture is part of the conversion funnel

### Don't
- Don't use pure white (`#ffffff`) as a page background — the warm tone is part of the brand identity
- Don't substitute with generic sans-serif or serif — the custom font carries the brand
- Don't use weight 700 (bold) or above — 400 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 remove the input border — the border is the primary affordance indicator for form fields
- 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(242, 250, 255)` as the base canvas"
    why: "Every component is designed to composit against this exact tone"
    test: "document.body.style.backgroundColor === 'rgb(242, 250, 255)'"
  - id: brand-accent-001
    type: do
    rule: "Reserve `rgb(229, 244, 255)` for primary CTAs and brand-mark signals only"
    why: "Single chromatic assertion device — overuse dilutes meaning"
    test: "querySelectorAll('[style*=\"rgb(229, 244, 255)\"]').length <= 3 per fold"
```

## 9. Responsive Behavior

### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 479px | Single column, compact spacing |
| Mobile Large | 540px | Expanded mobile layout |
| Mobile Large | 767px | Expanded mobile layout |
| Tablet | 900px | Multi-column grids begin |
| Desktop | 1279px | Full feature layout |
| Large Desktop | 1440px | Maximum content width |

### Token Diff — Desktop vs Mobile

| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| heading | font-size | `56px` | `36px` |
| heading | line-height | `61.6px` | `43.2px` |
| heading | letter-spacing | `-1.68px` | `-1.08px` |
| nav | display | `flex` | `none` |
| nav | height | `65.1875px` | `705.594px` |
| hero | height | `433.594px` | `378.422px` |
| button | padding | `25.6px 10px` | `12px 0px` |
| button | font-size | `16px` | `18px` |
| button | width | `106px` | `auto` |
| card | padding | `0px 0px 0px 120px` | `0px` |
| card | width | `1353.62px` | `358px` |

### Collapsing Strategy
- Headlines: 56px → 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: 25.6px 10px 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.*


## 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.*

- **Glassmorphism** — 5 frosted/blur layer(s) (e.g. `blur(12px)`).
- **Clip-path shapes** — 8 non-rectangular cut(s).

> **Motion fingerprint**: glassmorphism (6 layers), non-rectangular shapes (10)

## 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://cdn.prod.website-files.com/65b8cd72835ceeacd4449a53/69a1e9409d6b1c287c69da0d_Website%20preview.png
  *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): 10 (71%)
- Portrait (<0.87): 0 (0%)
- Square (0.87–1.15): 1 (7%)
- Ultra-wide (>2.3): 3 (21%)

**Media Format Mix:**
- WebP: 4 (optimized photo/illustration hybrid)
- SVG: 8 (icons, illustrations, decorative geometry)

**Average rendered image size:** 424×297px
**Above-fold image count:** 0 / 14

**Decorative Patterns Detected:**
- 19 multi-stop linear gradients (mesh-like, 3+ color stops) — the brand leans on rich color transitions for visual depth
- 3 large decorative SVG shapes (≥200×200px, non-icon) — likely blob/illustration accents
- **Glassmorphism** detected (`backdrop-filter: blur`) — layered transparent surfaces with blur, modern OS-like aesthetic

**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: Ghost White (`#f2faff`)
- Primary text: #cce9ff (`#cce9ff`)
- Accent: Light Gray (`#e5f4ff`)
- Border: Charcoal (`#262c36`)
- Font: Aeonik
- Body: 16px weight 400

### Example Component Prompts
- "Create a hero section on Ghost White background (#f2faff). Headline at 56px Aeonik weight 300, line-height 1.1, letter-spacing -1.68px, color #cce9ff."
- "Create the primary CTA button: `#e5f4ff` background, `#cce9ff` text, 9999px border-radius, 25.6px 10px padding, 400 weight, Aeonik font."
- "Design a card on `transparent` background. Border: none. Radius: 0px. Shadow: none. Padding: 0px 0px 0px 120px."
- "Build navigation: static on `#f2faff`. Aeonik 16px weight 400 for links."

### Iteration Guide
1. **Canvas**: Set the light canvas to Ghost White (`#f2faff`) — every component is composited against this exact base.
2. **Typography**: All type in Aeonik, weight range 300–400. Never exceed 400 — heavier weights break the brand's tonal restraint.
3. **Accent**: Light Gray (`#e5f4ff`) is the sole interactive color. On hover → #cce9ff (`#cce9ff`). Use CSS transitions, not opacity/brightness filters.
4. **Shape**: CTAs at `0px`, cards at `0px`. Apply border-radius from the extracted scale only — don't invent intermediate values.
5. **Spacing**: Use the `--ca-space-*` token scale (8px–32px). All padding, margin, and gap values are multiples from this scale — no magic numbers.
6. **Tokens**: Import from §11 CSS Export (`--ca-*` vars). Never hardcode hex values — always reference a token so theming remains consistent.

## 11. CSS Design Tokens Raw Export

*Copy-paste ready `:root {}` block — all values extracted directly from the live site.*

```css
/* Colors */
:root {
  --ca-background: #f2faff;
  --ca-surface-1: #ffffff;
  --ca-primary: #e5f4ff;
  --ca-primary-hover: #cce9ff;
  --ca-ink-subtle: #030710;
  --ca-on-primary: #111111;
  --ca-hairline: #262c36;
  --ca-semantic-error: #b42318;
  --ca-semantic-success: #027a48;
}

/* Typography */
:root {
  --ca-font-primary: "Twklausanne", system-ui, sans-serif;
  --ca-text-display: 64px;
  --ca-text-body: 14px;
  --ca-text-button: 14px;
}

/* Spacing & Radius */
:root {
  --ca-space-xxs: 2px;
  --ca-space-xs: 8px;
  --ca-space-sm: 10px;
  --ca-space-md: 12px;
  --ca-space-base: 18px;
  --ca-space-lg: 24px;
  --ca-space-xl: 32px;
  --ca-space-2xl: 48px;
  --ca-space-3xl: 64px;
  --ca-radius-none: 0px;
  --ca-radius-xs: 4px;
  --ca-radius-sm: 8px;
  --ca-radius-md: 16px;
  --ca-radius-lg: 20px;
  --ca-radius-xl: 32px;
  --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: ["page-wrapper"]
    height: 9724px
    width: full-bleed
    layout: block
    children: 6
  - section: unknown
    tag: div
    height: 900px
    width: full-bleed
    layout: block
    children: 1
  - section: feature-section
    tag: section
    classes: ["home_hero-section"]
    height: 434px
    width: full-bleed
    layout: block
    children: 1
  - section: feature-section
    tag: main
    classes: ["main-wrapper"]
    height: 8937px
    width: full-bleed
    layout: block
    children: 5
  - section: feature-section
    tag: div
    classes: ["w-layout-blockcontainer"]
    height: 434px
    width: 1354px
    layout: block
    children: 1
    vertical-padding: ~78px (generous)
  - section: feature-section
    tag: div
    classes: ["home-hero-wrapper"]
    height: 434px
    width: 800px
    layout: flex-column justify=normal
    children: 6
    vertical-padding: ~78px (generous)
    padding: "78px 0px"
  - section: content-section
    tag: div
    classes: ["w-layout-blockcontainer"]
    height: 514px
    width: 1354px
    layout: block
    children: 2
  - section: content-section
    tag: div
    classes: ["home_animation-words-wrapper"]
    height: 514px
    width: full-bleed
    layout: block
    children: 1
  - section: feature-section
    tag: section
    classes: ["home_animation-section"]
    height: 1302px
    width: full-bleed
    layout: flex-column justify=normal
    children: 5
  - section: feature-section
    tag: div
    classes: ["w-layout-blockcontainer"]
    height: 800px
    width: 1354px
    layout: block
    children: 3
    vertical-padding: ~40px
  - section: feature-section
    tag: div
    classes: ["home_text-animation-wrapper"]
    height: 154px
    width: 1354px
    layout: grid: 1-col gap=48px
    children: 2
    bg: "rgb(3, 7, 16)"
    tone: dark
    vertical-padding: ~24px
    padding: "0px 0px 48px"
  - section: logo-strip
    tag: div
    classes: ["home_logos-wrapper"]
    height: 200px
    width: 1354px
    layout: flex-column justify=center
    children: 5
    bg: "rgba(3, 7, 16, 0.16)"
    vertical-padding: ~32px
    padding: "32px 0px"
  - section: feature-section
    tag: div
    classes: ["home_text-wrapper"]
    height: 126px
    width: 1354px
    layout: grid: 2-col gap=32px
    children: 2
  - section: content-section
    tag: section
    classes: ["home_cards-section"]
    height: 3658px
    width: full-bleed
    layout: block
    children: 1
  - section: content-section
    tag: div
    classes: ["home_card-grid", "more-gap", "is-first"]
    height: 756px
    width: 1007px
    layout: grid: 2-col gap=80px
    children: 2
    vertical-padding: ~128px (airy)
    padding: "128px 0px"
  - section: content-section
    tag: div
    classes: ["w-layout-blockcontainer"]
    height: 3656px
    width: 1354px
    layout: block
    children: 1
  - section: content-section
    tag: div
    classes: ["home-cards-wrapper"]
    height: 3656px
    width: 1354px
    layout: grid: 2-col gap=24px
    children: 2
    padding: "0px 0px 0px 120px"
  - section: content-section
    tag: div
    classes: ["home_cards-wrapper"]
    height: 3656px
    width: 1007px
    layout: flex-column justify=normal
    children: 6
    vertical-padding: ~139px (airy)
  - section: unknown
    tag: div
    classes: ["feature-card-wrapper"]
    height: 500px
    width: 646px
    layout: flex-row justify=center
    children: 2
    bg-treatment: linear-gradient
    vertical-padding: ~24px
    padding: "24px 22px"
  - section: unknown
    tag: div
    height: 422px
    width: 204px
    layout: flex-column justify=normal
    children: 5
    vertical-padding: ~160px (airy)
    padding: "0px 0px 320px"
  - section: content-section
    tag: div
    height: 128px
    width: 432px
    layout: block
    children: 1
  - section: content-section
    tag: div
    classes: ["home_card-grid", "more-gap"]
    height: 701px
    width: 1007px
    layout: grid: 2-col gap=80px
    children: 2
    vertical-padding: ~64px (generous)
    padding: "64px 0px"
  - section: unknown
    tag: div
    classes: ["feature-card-wrapper"]
    height: 500px
    width: 646px
    layout: flex-row justify=center
    children: 2
    bg-treatment: linear-gradient
    vertical-padding: ~24px
    padding: "24px 22px"
  - section: content-section
    tag: div
    height: 294px
    width: 432px
    layout: block
    children: 2
  - section: testimonials
    tag: div
    classes: ["home_card-grid", "more-gap"]
    height: 628px
    width: 1007px
    layout: grid: 2-col gap=80px
    children: 2
    vertical-padding: ~64px (generous)
    padding: "64px 0px"
```

**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:
    - "LangSmith powers top AI teams, from startups to global enterprises"
    - "Learn from teams running agents in production"
    - "Trusted by the largest builder community in AI"
    - "Get started with LangSmith"
  sub-headings:
    - "LangSmith Agent Engineering Platform"
    - "Build with our open source frameworks"
  ctas:
    - "Products"
    - "Try LangSmith"
    - "Get a demo"
    - "More customer stories"
  navigation:
    - "Try LangSmith"
    - "Get a demo"
    - "Docs"
    - "Pricing"
  footer-links:
    - "LangSmith Platform"
    - "Events"
    - "All systems operational"
    - "Privacy policy"
```

**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: 15
    avg-ratio: 2.49
    common-aspect: "~16:9 landscape"
    sample-alts:
      - "Klarna"
      - "Vanta"
      - "clay"
  thumbnail:
    count: 2
    avg-ratio: 1.01
    common-aspect: "~1:1 square"
    sample-alts:
      - "lyft"
      - "NU"
```

**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">
  Products
</button>
```
_Source pattern detected: padding `25.6px 10px` · radius `0px` · weight `400`_

### Generic Card
```html
<div class="card">
  <!-- content -->
</div>
```
_Source pattern detected: padding `0px` · radius `0px` · 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** 2 · **cta** 1 · **pricing** 1 · **docs** 1 · **blog** 3 · **project** 2 · **social** 3 · **footer** 19 · **other** 18

**Primary actions (conversion path):**
- Primary call-to-action — "Try LangSmith" (the conversion path) → `https://smith.langchain.com/`

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

*Langsmith* — medium confidence, 5 items:

| Title | Featured image | Link |
|---|---|---|
| LangSmith Observability | `698afeb61612bb3b1af6e9ee_Frame%20214` (ar 1) | https://www.langchain.com/langsmith/observability |
| LangSmith Evaluation | `698afeb8f6d6d95dc67c49c2_Frame%20214` (ar 1) | https://www.langchain.com/langsmith/evaluation |
| LangSmith Deployment | `698afeb61aa4c669a370f8ca_updated.svg` (ar 1) | https://www.langchain.com/langsmith/deployment |
| LangSmith Fleet | `69bae20e727b24b507666efe_LangSmith%2` (ar 1) | https://www.langchain.com/langsmith/fleet |
| LangSmith Sandboxes | — | https://www.langchain.com/langsmith/sandboxes |

**Signals:** 22/50 links carry a featured image · device mockups detected: laptop ×4 · dominant link roles: footer-link (24), content-card (16), inline-link (7).


---
## Extraction Completeness: 76/100 (B)

| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 25 | 25 | 19 named colors |
| Typography | 15 | 20 | 6 roles defined |
| Components | 16 | 20 | 4 specs extracted |
| Motion & Interaction | 10 | 15 | Keyframes |
| CSS Custom Properties | 5 | 10 | 93 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 (webflow-icons, Manrope, Museomoderno)** — 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.
- **1 parasitic shadow(s) detected** — colored box-shadows (not near-black) found in allShadows. These likely originate from browser extensions or third-party injected widgets (e.g. Grammarly, chat overlays), not from the site's own design system. Discard them when building.

| 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 |

### Per-section confidence

| Section | Confidence | Reason |
|---------|------------|--------|
| §1 Visual Theme | High | Body bg extracted via getComputedStyle() |
| §2 Colors | High | 93 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 6 typography roles inferred |
| §4 Components | Medium | 4 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 22 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 6 breakpoints detected |
| §9b Photography | Medium | 14 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

3 font file(s) captured (228KB total). When running `prism add`, fonts are saved to `extractions/langchain.com/fonts/` and embedded as base64 in the output HTML.

**@font-face declarations to use:**
```css
@font-face {
  font-family: 'webflow-icons';
  /* src: url('/fonts/webflow-icons.woff2') format('woff'); */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 200;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Manrope';
  /* src: url('/fonts/Manrope.woff2') format('woff2'); */
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Museomoderno';
  /* src: url('/fonts/Museomoderno.woff2') format('truetype'); */
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Twklausanne';
  /* src: url('/fonts/Twklausanne.woff2') format('opentype'); */
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Twklausanne';
  /* src: url('/fonts/Twklausanne.woff2') format('opentype'); */
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Aeonik';
  /* src: url('/fonts/Aeonik.woff2') format('opentype'); */
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Twklausanne';
  /* src: url('/fonts/Twklausanne.woff2') format('opentype'); */
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Aeonik';
  /* src: url('/fonts/Aeonik.woff2') format('opentype'); */
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
```

### Keyframe Animations (Intercepted from CSS)

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

```
@keyframes spin { ... }
```

<details><summary>Full keyframes CSS (1 animations)</summary>

```css
@keyframes spin{0%{transform:rotate(0)}
```
</details>

### Brand Gradient Palette

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

```css
/* Gradient 1 */
background: linear-gradient(135deg,#ff744826,#ff484826 50%,#6248ff26);

/* Gradient 2 */
background: radial-gradient(circle farthest-corner at 50% 50%,var(--colors--orange--orange-100);

/* Gradient 3 */
background: linear-gradient(180deg,var(--colors--violet--violet-200-full);

/* Gradient 4 */
background: radial-gradient(circle farthest-corner at 50% 50%,var(--colors--violet--violet-200);

/* Gradient 5 */
background: radial-gradient(circle farthest-corner at 50% 50%,var(--colors--red--red-400);

```

### Hover State CSS (Intercepted)

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

```css
a:active,a:hover{outline:0}

.w-lightbox-control:hover{opacity:1}

.w-lightbox-inactive,.w-lightbox-inactive:hover{opacity:0}
```

> **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 1723 rendered nodes** — not a sample. These are the values the page *actually paints*, weighted by how often they appear.

### Real Responsive Breakpoints
**11 breakpoints** read from the live `@media` rules (not guessed):
`479px` · `540px` · `767px` · `768px` · `900px` · `991px` · `992px` · `1279px` · `1280px` · `1440px` · `1920px`

### Measured Design Scale
**Type scale by usage** (× = paint count): `16px`×1218 · `14px`×238 · `48px`×134 · `64px`×56 · `18px`×18 · `24px`×18 · `32px`×16 · `56px`×10

**Radius scale** (× = paint count): `6px`×24 · `50%`×15 · `16px`×10 · `80px`×8 · `32px`×5 · `8px`×3 · `20px`×2 · `19px`×1

**Weights** (× = paint count): `400`×1298 · `300`×420

**Layout gaps** (× = paint count): `16px`×15 · `24px`×11 · `12px`×8 · `20px`×7 · `80px`×5 · `56px`×5 · `32px`×4 · `8px`×4

**Elevation (real shadows)**:
```css
rgba(127, 200, 255, 0.5) 0px 0px 32px 0px
```

### 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 { color:#333; background-color:#fff; font-family:Arial,sans-serif; font-size:14px }
body { background-color:var(--colors--violet--violet-100); color:var(--colors--green--green-400); font-family:Manrope,sans-serif; font-size:1rem }
body { background-color:var(--_v-2-colors---c-blue-dark--900); color:var(--_v-2-colors---c-blue-light--500); font-family:Aeonik,Tahoma,sans-serif }
h1 { font-size:2em }
h1 { font-size:38px }
h1 { font-family:Manrope,sans-serif; font-size:5.5rem; font-weight:400 }
h1 { font-family:Twklausanne,Tahoma,sans-serif; font-size:4.5rem; font-weight:300 }
h1 { color:#7fc8ff }
h1 { font-size:3.5rem }
h2 { font-size:32px }
h2 { font-size:3.5rem; font-weight:400 }
h2 { font-family:Twklausanne,Tahoma,sans-serif; font-size:3rem; font-weight:300 }
```

> 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://langchain.com | 2026-06-11T05:45:43.838Z*
*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.*