Customer.io
MIT
Dark SaaS design system with mint-green accents and clean typography, built for product dashboards and developer-focused platforms
Published by Layout11 importsminimal tierLayout StudioImport this kit into a Studio project and start editing.
CLI installRun it in any project. No account needed.
npx @layoutdesign/context install customer-ioUI themeReskin shadcn or Layout UI components to match Customer.io.
npx shadcn add https://layout.design/r/customer-io/theme.json# layout.md — Customer.io Design System
---
## 0. Quick Reference
> Inject into `CLAUDE.md` or `.cursorrules` for immediate AI context.
**Stack:** Next.js · Tailwind CSS · Custom font (`saansFont`) · Token source: reconstructed-from-computed (low confidence, 0 native CSS vars)
**How to apply:** Use as `var(--token-name)` in CSS, `style={{ prop: 'var(--token-name)' }}` in JSX, or `bg-[var(--token-name)]` in Tailwind.
```css
:root {
/* Brand */
--customer-accent: rgb(197, 252, 195); /* mint green brand mark */
--customer-bg-app: rgb(14, 70, 77); /* deep teal brand mark / dark bg */
/* Semantic colours */
--color-bg-dark: oklch(0.245 0.042 207.2); /* ≈ #1a3d44 — page/section dark bg */
--color-bg-surface: oklch(0.3068 0.046 206.34); /* ≈ #2e5c63 — card/button surface */
--color-text-on-dark: oklch(1 0 0); /* white — headings on dark bg */
--color-text-body: rgb(255, 255, 255); /* white — body on dark bg */
--color-text-muted: rgb(153, 153, 153); /* mid-grey — links/secondary text */
--color-badge-text: oklch(0.5158 0.094 81.3); /* warm amber — badge label */
--color-badge-bg: oklch(0.9914 0.0088 86.2); /* near-white amber — badge bg */
/* Typography */
--font-primary: 'saansFont', 'saansFont Fallback', Arial, sans-serif;
--customer-font-size-xs: 12px;
--customer-font-size-sm: 14px;
--customer-font-size-md: 16px;
--customer-font-size-lg: 18px;
--customer-font-size-xl: 24px;
--customer-font-size-2xl: 40px;
--customer-font-size-3xl: 96px;
--customer-font-weight-regular: 475;
--customer-font-weight-medium: 500;
--customer-font-weight-semibold: 600;
--customer-font-weight-bold: 700;
/* Spacing (4px grid) */
--customer-space-sm: 4px;
--customer-space-md: 8px;
--customer-space-lg: 16px;
--customer-space-xl: 24px;
--customer-space-2xl: 32px;
--customer-space-3xl: 96px;
/* Radius */
--customer-radius-sm: 2px; /* badges */
--customer-radius-md: 4px; /* cards, cookie banner */
--customer-radius-lg: 9999px; /* pill buttons — ALL primary CTAs */
/* Motion */
--customer-duration-fast: 0.2s;
--customer-duration-base: 0.4s;
--customer-ease-default: ease;
--customer-ease-decel: cubic-bezier(0, 0, 0.35, 1);
}
```
```tsx
// Primary button — pill shape, teal bg, white text, green ring on focus
<button className="flex items-center justify-center gap-2 px-7 py-2 rounded-full font-semibold text-base text-white transition-all duration-200"
style={{ backgroundColor: 'var(--color-bg-surface)', border: '2px solid var(--color-bg-surface)', borderRadius: 'var(--customer-radius-lg)' }}>
Get started
</button>
```
**NEVER rules:**
- NEVER use `border-radius` values other than `2px`, `4px`, or `9999px` — the brand has three exact radii only
- NEVER set a primary CTA to `border-radius: 8px` — all pill buttons use `9999px`
- NEVER use `Arial` or `Inter` as the primary font — always load `saansFont` first
- NEVER hardcode hex colours — always reference a `--customer-*` or `--color-*` token
- NEVER use spacing values off the 4px grid — only `4 / 8 / 16 / 24 / 32 / 96px`
- NEVER render body text in `font-weight: 400` — the brand minimum is `475`
- NEVER omit the `letter-spacing: 0.2px` — it is applied universally across all type
**Full design system → see layout.md**
<!-- Quick Reference truncated to fit the 75-line cap. See later sections for the full design system. -->
## 1. Design Direction & Philosophy
### Character & Mood
Customer.io presents as a **precision-engineering brand for technical marketers**. The aesthetic is dark, confident, and data-driven — the visual language of a B2B SaaS product that trusts its users to be intelligent. It combines deep teal near-blacks with a single vivid mint-green accent, creating a palette that reads as "sophisticated tech" without the cold sterility of pure black-and-white.
Typography is set in `saansFont`, a custom geometric sans-serif with unusually precise weight values (`475` for regular, not the standard `400`). This signals intentional craft. Headlines run very large (96px) with tight line-heights (1:1 ratio at H1), projecting authority and product confidence.
### What This Design IS
- **Dark-first:** Primary backgrounds are deep teal (`oklch(0.245 0.042 207.2)`), not white
- **Pill-button brand:** Every primary CTA uses `border-radius: 9999px` — a full pill shape
- **Minimalist radius scale:** Only three radius values exist: `2px` (badges), `4px` (cookie banners/cards), `9999px` (pills)
- **Motion-considered:** Transforms use a custom deceleration curve `cubic-bezier(0, 0, 0.35, 1)`, giving UI interactions a snappy-then-ease feel
- **Ambient animation:** Marquee scroll loops and gradient animations run at very slow durations (`40s`) to create atmospheric motion without distraction
### What This Design EXPLICITLY REJECTS
- Warm color palettes — teal and mint are cool-toned only
- Rounded-rectangle buttons (`8px`/`12px` radius) — the brand is pill or sharp, nothing in between
- Decorative serif or slab typefaces — pure geometric sans throughout
- High-saturation multi-colour systems — the palette is tightly controlled with one accent
- Box shadows as primary depth mechanism — elevation is achieved through background colour contrast, not shadows
- Standard weight steps (100/300/400/700) — the custom `475` weight is a brand-specific decision, not a rounding error
---
## 2. Colour System
### Tier 1: Primitive Values
```css
/* ── Primitives ── */
:root {
/* Teal scale */
--primitive-teal-900: oklch(0.245 0.042 207.2); /* ≈ #1a3d44 — deepest dark */
--primitive-teal-700: oklch(0.3068 0.046 206.34); /* ≈ #2e5c63 — surface/button */
--primitive-teal-600: rgb(14, 70, 77); /* exact brand mark teal */
/* Mint */
--primitive-mint-300: rgb(197, 252, 195); /* brand mark mint green */
/* Neutral */
--primitive-white: oklch(1 0 0); /* pure white */
--primitive-grey-400: rgb(153, 153, 153); /* mid grey */
--primitive-border: oklch(0.94 0 0); /* very light grey border */
/* Amber (badge only) */
--primitive-amber-600: oklch(0.5158 0.094 81.3); /* badge text amber */
--primitive-amber-50: oklch(0.9914 0.0088 86.2); /* badge bg near-white amber */
}
```
### Tier 2: Semantic Aliases
```css
/* ── Semantic ── */
:root {
/* Backgrounds */
--color-bg-page: var(--primitive-teal-900); /* main page background */
--color-bg-dark: var(--primitive-teal-900); /* dark section backgrounds */
--color-bg-surface: var(--primitive-teal-700); /* elevated surfaces, buttons */
--color-bg-brand: var(--primitive-teal-600); /* brand-coloured elements */
/* Text */
--color-text-primary: var(--primitive-white); /* headings and body on dark bg */
--color-text-body: var(--primitive-white); /* body copy on dark bg */
--color-text-muted: var(--primitive-grey-400); /* secondary / link text */
--color-text-heading: var(--primitive-teal-900); /* headings on light bg sections */
/* Accent / Brand */
--color-accent: var(--primitive-mint-300); /* brand mark, highlights */
--color-brand-mark: var(--primitive-teal-600); /* brand mark secondary fill */
/* Interactive */
--color-action-bg: var(--primitive-teal-700); /* primary button bg */
--color-action-border: var(--primitive-teal-700); /* primary button border */
--color-action-ring: oklch(0.9263 0.136 145.2); /* focus ring — bright green */
--color-action-text: var(--primitive-white); /* button text */
/* Feedback */
--color-badge-text: var(--primitive-amber-600); /* badge / status label */
--color-badge-bg: var(--primitive-amber-50); /* badge / status bg */
/* Structural */
--color-border: var(--primitive-border); /* default border colour */
--color-border-dark: oklch(0.3068 0.046 206.34); /* border on dark cards */
}
```
### Tier 3: Component Applications
```css
/* ── Component tokens ── */
:root {
--button-primary-bg: var(--color-action-bg);
--button-primary-border: var(--color-action-border);
--button-primary-text: var(--color-action-text);
--button-primary-ring: var(--color-action-ring);
--button-primary-radius: var(--customer-radius-lg);
--badge-bg: var(--color-badge-bg);
--badge-text: var(--color-badge-text);
--badge-radius: var(--customer-radius-sm);
--nav-text: var(--color-text-heading); /* nav on light bg */
--nav-bg: transparent;
}
```
### Colour Role Table
| Token | Value | Usage |
|---|---|---|
| `--color-bg-page` | `oklch(0.245 0.042 207.2)` | Page root background |
| `--color-bg-surface` | `oklch(0.3068 0.046 206.34)` | Cards, elevated surfaces, CTA buttons |
| `--color-accent` | `rgb(197, 252, 195)` | Brand mark mint, highlights, rings |
| `--color-action-ring` | `oklch(0.9263 0.136 145.2)` | Focus visible ring on primary buttons |
| `--color-text-primary` | `oklch(1 0 0)` | All text on dark backgrounds |
| `--color-text-muted` | `rgb(153, 153, 153)` | Links, secondary nav text |
| `--color-badge-bg` | `oklch(0.9914 0.0088 86.2)` | Badge chips background |
| `--color-badge-text` | `oklch(0.5158 0.094 81.3)` | Badge chips text (amber) |
---
## 3. Typography System
**Font stack: `saansFont, 'saansFont Fallback', Arial, sans-serif`** — always in this order.
### Composite Type Groups
```css
/* ── Display / H1 ── */
.type-display {
font-family: var(--font-primary);
font-size: var(--customer-font-size-3xl); /* 96px */
font-weight: var(--customer-font-weight-regular); /* 475 */
line-height: 96px; /* 1:1 ratio */
letter-spacing: 0.2px; /* universal */
color: var(--color-text-primary);
/* Used for: Hero H1, large typographic callouts */
}
/* ── Heading 2 / Section titles ── */
.type-h2 {
font-family: var(--font-primary);
font-size: var(--customer-font-size-2xl); /* 40px */
font-weight: var(--customer-font-weight-regular); /* 475 */
line-height: 45px; /* 1.125 ratio */
letter-spacing: 0.2px;
color: var(--color-text-primary);
/* Used for: Section headings throughout the page */
}
/* ── Heading 3 / Card title large ── */
.type-h3-lg {
font-family: var(--font-primary);
font-size: var(--customer-font-size-xl); /* 24px */
font-weight: var(--customer-font-weight-semibold); /* 600 */
line-height: 27px; /* approx 1.125 */
letter-spacing: 0.2px;
color: var(--color-text-primary);
/* Used for: Feature card titles (Activation, Retention, etc.) */
}
/* ── Heading 3 / Card title medium ── */
.type-h3-md {
font-family: var(--font-primary);
font-size: var(--customer-font-size-lg); /* 18px */
font-weight: var(--customer-font-weight-medium); /* 500 */
line-height: 22.5px;
letter-spacing: 0.2px;
color: var(--color-text-primary);
/* Used for: Feature sub-card titles */
}
/* ── Heading 3 / Dark card (white on dark) ── */
.type-h3-dark {
font-family: var(--font-primary);
font-size: 20px; /* between lg and xl */
font-weight: var(--customer-font-weight-semibold); /* 600 */
line-height: 22.5px;
letter-spacing: 0.2px;
color: var(--color-text-primary); /* white */
/* Used for: Headings on dark teal card surfaces */
}
/* ── Body / Default paragraph ── */
.type-body {
font-family: var(--font-primary);
font-size: var(--customer-font-size-md); /* 16px */
font-weight: var(--customer-font-weight-regular); /* 475 */
line-height: var(--customer-line-height-normal); /* 22px */
letter-spacing: 0.2px;
color: var(--color-text-body);
/* Used for: General paragraph copy, descriptions */
}
/* ── Body Small ── */
.type-body-sm {
font-family: var(--font-primary);
font-size: var(--customer-font-size-sm); /* 14px */
font-weight: var(--customer-font-weight-regular); /* 475 */
line-height: 19.6px;
letter-spacing: 0.2px;
color: var(--color-text-body);
/* Used for: Supporting copy, stat descriptions */
}
/* ── Button label ── */
.type-button {
font-family: var(--font-primary);
font-size: var(--customer-font-size-md); /* 16px */
font-weight: var(--customer-font-weight-semibold); /* 600 */
line-height: 22px;
letter-spacing: 0.2px;
/* Used for: All CTA button labels */
}
/* ── Badge / Label chip ── */
.type-badge {
font-family: var(--font-primary);
font-size: var(--customer-font-size-xs); /* 12px */
font-weight: var(--customer-font-weight-regular); /* 475 */
line-height: var(--customer-line-height-tight); /* 16.5px */
letter-spacing: 0.2px;
/* Used for: Badge chips (e.g. "case study") */
}
/* ── Nav / Dropdown ── */
.type-nav {
font-family: var(--font-primary);
font-size: var(--customer-font-size-md); /* 16px */
font-weight: var(--customer-font-weight-regular); /* 475 */
line-height: 22px;
letter-spacing: 0.2px;
/* Used for: Navigation items, dropdown labels */
}
/* ── Link ── */
.type-link {
font-family: var(--font-primary);
font-size: 15px; /* between sm and md */
font-weight: var(--customer-font-weight-bold); /* 700 */
line-height: 20.625px;
letter-spacing: 0.2px;
color: var(--color-text-muted);
/* Used for: Inline links, secondary nav actions */
}
```
### Weight Scale
| Token | Value | Context |
|---|---|---|
| `--customer-font-weight-regular` | `475` | Body, headings, nav, badges |
| `--customer-font-weight-medium` | `500` | Tab labels, medium emphasis |
| `--customer-font-weight-semibold` | `600` | H3 cards, buttons |
| `--customer-font-weight-bold` | `700` | Stats callouts, links |
> **Critical:** `475` is not `400`. Never substitute `font-weight: normal` or `400` — the brand custom font is tuned to `475` as its regular weight.
---
## 4. Spacing & Layout
**Base unit: 4px.** All spacing tokens are multiples of 4px except `--customer-space-xs` (1px — edge case only, treat as a hairline/divider token, not a layout spacer).
```css
:root {
--customer-space-xs: 1px; /* hairline dividers only — NOT for layout spacing */
--customer-space-sm: 4px; /* tight internal padding, icon gaps */
--customer-space-md: 8px; /* button vertical padding, component inner gaps */
--customer-space-lg: 16px; /* section inner padding, tab vertical padding */
--customer-space-xl: 24px; /* card padding, larger component gaps */
--customer-space-2xl: 32px; /* section gap, card group spacing */
--customer-space-3xl: 96px; /* major section vertical rhythm, hero padding */
}
```
### Spacing Scale Table
| Token | Value | Grid Multiple | Usage |
|---|---|---|---|
| `--customer-space-xs` | `1px` | — | Hairline borders/dividers only |
| `--customer-space-sm` | `4px` | ×1 | Tight gaps, badge padding horizontal |
| `--customer-space-md` | `8px` | ×2 | Button padding-y, icon gaps |
| `--customer-space-lg` | `16px` | ×4 | Tab padding, section inner padding |
| `--customer-space-xl` | `24px` | ×6 | Card padding, component group gaps |
| `--customer-space-2xl` | `32px` | ×8 | Section spacing, major gaps |
| `--customer-space-3xl` | `96px` | ×24 | Hero vertical padding, section separators |
### Grid & Layout
```css
/* ── Container ── */
.container {
width: 100%;
max-width: 1280px; /* inferred from typical Next.js + Tailwind xl breakpoint */
margin-inline: auto;
padding-inline: var(--customer-space-xl); /* 24px sides */
}
/* ── Breakpoints (inferred from Tailwind defaults) ── */
/* sm: 640px — mobile landscape */
/* md: 768px — tablet */
/* lg: 1024px — small desktop */
/* xl: 1280px — wide desktop */
/* 2xl: 1536px — ultrawide */
/* ── Primary button layout ── */
.btn-layout {
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
gap: var(--customer-space-md); /* 8px between icon and label */
padding: var(--customer-space-md) 28px; /* 8px 28px — extracted exact */
}
/* ── Nav layout ── */
.nav-layout {
display: block; /* role_navigation computed style */
padding: 0px;
}
/* ── Tab layout ── */
.tab-layout {
display: flex;
flex-direction: column;
align-items: flex-start;
gap: var(--customer-space-md); /* 8px */
padding: var(--customer-space-lg) 0px; /* 16px 0px */
}
/* ── Badge layout ── */
.badge-layout {
display: flex;
flex-direction: row;
justify-content: center;
align-items: center;
gap: var(--customer-space-sm); /* 4px */
padding: var(--customer-space-sm) var(--customer-space-md); /* 4px 8px */
}
```
---
## 5. Page Structure & Layout Patterns
> Derived from LAYOUT DIGEST + component inventory. Rows marked **(inferred)** are not visually confirmed.
### 5.1 Section Map
| # | Section | Layout Type | Approx. Height | Key Elements |
|---|---|---|---|---|
| 1 | **Navigation / Header** | `display:block`, flex row (inferred full-width) | 64–80px | Logo, nav items (dropdown), "Sign in" + "Get started" pill CTAs |
| 2 | **Hero** | Full-width centered (inferred) | 480–600px | H1 96px, sub-copy, 2 pill CTAs, animated brand mark (inferred) |
| 3 | **Social proof / Logos** | Marquee scroll row (inferred) | 80–120px | Customer logo strip, `animation: scroll 40s` marquee |
| 4 | **Feature grid — "Everything you need"** | 2-col or 3-col grid (inferred) | 600–800px | H2, feature cards with H3 + body copy, icon/illustration |
| 5 | **AI Agent spotlight — "Meet your AI Agent"** | Split 2-col (inferred) | 400–600px | H2, body, pill CTA, product screenshot/animation |
| 6 | **Use cases — "Support every stage"** | Tabs + content panel (inferred) | 500–700px | Tab nav (col layout, 16px padding), content cards with badge chips |
| 7 | **Proof / Case studies** | Card grid (inferred) | 400–500px | Badge "case study" chips, stat callouts (bold, 700 weight) |
| 8 | **CTA band** | Full-width centered (inferred) | 200–300px | H2, pill CTA primary, optional secondary link |
| 9 | **Footer** | Multi-col grid (inferred) | 300–400px | Nav links (muted text), logo, legal copy (xs text) |
### 5.2 Layout Patterns
**Navigation:**
- `display: block` at the nav role level; child content likely `flex row` with space-between for logo ↔ links ↔ actions
- Nav item text: `font-size: 16px`, `font-weight: 475`, `color: oklch(0.245 0.042 207.2)` (dark teal on light bg)
- "Sign in" is a secondary pill link; "Get started" and "Book a demo" are primary pill buttons with `border-radius: 9999px` and teal bg
**Hero:**
- Single-column centered layout (inferred from H1 being the dominant element)
- H1 at `96px / 96px` line-height — no line gap, stacked tight
- Two CTAs side-by-side: primary pill + secondary pill/outline variant (inferred)
- Animated text gradient (`@keyframes text-gradient`) likely applied to a word or phrase in the headline
**Feature Cards:**
- Grid with likely 3 columns at desktop (inferred from H3 inventory: Journeys, Audiences, Data & integrations, Activation, Retention, Cross-sell & upsell)
- Card heading: `font-size: 24px`, `font-weight: 600`
- Card body: `font-size: 16px`, `font-weight: 475`, `line-height: 22px`
- Gap: `var(--customer-space-2xl)` (32px) between cards (inferred from spacing scale)
**Tabs section:**
- Tab item layout: `flex-direction: column`, `align-items: flex-start`, `gap: 8px`, `padding: 16px 0px`
- Tab text: `16px`, `font-weight: 500`
- Transition: `0.2s cubic-bezier(0, 0, 0.35, 1)`
**Badge chips:**
- `border-radius: 2px` — sharp rectangle, NOT pill
- Amber palette (`oklch(0.5158 0.094 81.3)` text on `oklch(0.9914 0.0088 86.2)` bg)
- Used to label card type ("case study", "blog", etc.)
### 5.3 Visual Hierarchy
1. **H1 at 96px** dominates the hero — nothing else competes at this scale
2. **Mint green (`rgb(197, 252, 195)`) accent** is the single-colour highlight, used sparingly in brand marks and possibly inline text gradients
3. **Primary CTAs** are always pill-shaped, teal background, with a **bright green focus ring** (`oklch(0.9263 0.136 145.2) 0 0 0 4px`)
4. **Whitespace rhythm:** Major section breaks use `96px` (`--customer-space-3xl`) vertical padding
5. **Muted links** (`rgb(153, 153, 153)`) provide navigation affordance without competing with CTAs
6. **Badge chips** (amber on cream) create categorical labelling contrast against the dark teal surface
### 5.4 Content Patterns
- **Stat callouts:** Bold number in `font-weight: 700`, description in `font-size: 14px` — used in case study cards (e.g. "28% increase in click-through")
- **Feature card pattern:** Badge chip → H3 title → body paragraph → (optional) secondary link
- **Marquee logos:** Infinite scroll at `40s` duration, paused on hover via `animation-play-state`
- **CTA pair pattern:** Primary pill CTA + secondary pill link/button side-by-side, gap `8px`–`16px`
- **Section header pattern:** H2 centred or left-aligned, followed by body subtext, then grid/card content below
---
## 6. Component Patterns
### 6.1 Primary Button
**Anatomy:** Container (pill, flex row) → [Optional icon] → Label text
**Token mappings:**
| State | Background | Border | Text | Shadow/Ring | Opacity |
|---|---|---|---|---|---|
| Default | `var(--color-action-bg)` | `2px solid var(--color-action-border)` | `var(--color-action-text)` | None | 1 |
| Hover | Lightened surface (inferred) | Same | Same | None | 1 |
| Focus | `var(--color-action-bg)` | `2px solid var(--color-action-border)` | Same | `0 0 0 4px var(--color-action-ring)` | 1 |
| Active | Darkened surface (inferred) | Same | Same | None | 1 |
| Disabled | `var(--color-action-bg)` | Same | Same | None | 0.5 |
| Loading | `var(--color-action-bg)` | Same | Hidden | Spinner via `nprogress-spinner` | 1 |
```tsx
// components/PrimaryButton.tsx
import { ButtonHTMLAttributes, ReactNode } from 'react';
interface PrimaryButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
children: ReactNode;
isLoading?: boolean;
icon?: ReactNode;
}
export function PrimaryButton({
children,
isLoading = false,
icon,
disabled,
...props
}: PrimaryButtonProps) {
const isDisabled = disabled || isLoading;
return (
<button
{...props}
disabled={isDisabled}
style={{
fontFamily: 'var(--font-primary)',
fontSize: 'var(--customer-font-size-md)', // 16px
fontWeight: 'var(--customer-font-weight-semibold)', // 600
lineHeight: '22px',
letterSpacing: '0.2px',
color: 'var(--color-action-text)',
backgroundColor: 'var(--color-action-bg)',
border: '2px solid var(--color-action-border)',
borderRadius: 'var(--customer-radius-lg)', // 9999px pill
padding: '8px 28px', // var(--customer-space-md) 28px
display: 'flex',
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'center',
gap: 'var(--customer-space-md)', // 8px
transition: `0.2s var(--customer-ease-decel, cubic-bezier(0, 0, 0.35, 1))`,
opacity: isDisabled ? 0.5 : 1,
cursor: isDisabled ? 'not-allowed' : 'pointer',
outline: 'none',
// Focus ring applied via CSS :focus-visible (see stylesheet)
}}
onFocus={(e) => {
(e.currentTarget as HTMLButtonElement).style.boxShadow =
'oklch(0.9263 0.136 145.2) 0px 0px 0px 4px';
}}
onBlur={(e) => {
(e.currentTarget as HTMLButtonElement).style.boxShadow = 'none';
}}
>
{isLoading ? (
<svg
aria-hidden="true"
style={{ width: 16, height: 16, animation: 'spin 1s linear infinite' }}
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
strokeWidth={2}
>
<path d="M12 2v4M12 18v4M4.93 4.93l2.83 2.83M16.24 16.24l2.83 2.83" />
</svg>
) : icon}
<span style={{ visibility: isLoading ? 'hidden' : 'visible' }}>
{children}
</span>
</button>
);
}
```
> In a stylesheet, add: `.btn-primary:focus-visible { box-shadow: oklch(0.9263 0.136 145.2) 0px 0px 0px 4px; }`
---
### 6.2 Badge / Label Chip
**Anatomy:** Container (flex row, amber bg, 2px radius) → [Optional icon] → Label text
| State | Background | Text | Border |
|---|---|---|---|
| Default | `var(--color-badge-bg)` | `var(--color-badge-text)` | None |
| Hover | No change (static label) | No change | — |
| Disabled | Same + `opacity: 0.5` | Same | — |
```tsx
// components/Badge.tsx
interface BadgeProps {
label: string;
icon?: React.ReactNode;
}
export function Badge({ label, icon }: BadgeProps) {
return (
<span
style={{
fontFamily: 'var(--font-primary)',
fontSize: 'var(--customer-font-size-xs)', // 12px
fontWeight: 'var(--customer-font-weight-regular)', // 475
lineHeight: 'var(--customer-line-height-tight)', // 16.5px
letterSpacing: '0.2px',
color: 'var(--color-badge-text)',
backgroundColor: 'var(--color-badge-bg)',
borderRadius: 'var(--customer-radius-sm)', // 2px — NOT pill
padding: '4px 8px', // sm lg
display: 'inline-flex',
flexDirection: 'row',
alignItems: 'center',
justifyContent: 'center',
gap: 'var(--customer-space-sm)', // 4px
}}
>
{icon}
{label}
</span>
);
}
```
---
### 6.3 Navigation Item
**Anatomy:** Nav container → Nav link / Dropdown trigger → [Dropdown panel]
| State | Text colour | Background |
|---|---|---|
| Default | `var(--color-text-heading)` (`oklch(0.245 0.042 207.2)`) | Transparent |
| Hover | `var(--color-text-heading)` (unchanged, inferred) | Transparent / subtle tint (inferred) |
| Focus | Same | Transparent | Focus ring via outline |
| Active / Current | `var(--color-text-heading)` | Transparent |
```tsx
// components/NavItem.tsx
interface NavItemProps {
label: string;
href: string;
isActive?: boolean;
}
export function NavItem({ label, href, isActive }: NavItemProps) {
return (
<a
href={href}
aria-current={isActive ? 'page' : undefined}
style={{
fontFamily: 'var(--font-primary)',
fontSize: 'var(--customer-font-size-md)', // 16px
fontWeight: 'var(--customer-font-weight-regular)', // 475
lineHeight: '22px',
letterSpacing: '0.2px',
color: 'var(--color-text-heading)', // oklch(0.245 0.042 207.2)
backgroundColor: 'transparent',
textDecoration: 'none',
transition: `all var(--customer-duration-fast) var(--customer-ease-default)`,
display: 'inline-block',
padding: '0',
}}
>
{label}
</a>
);
}
```
---
### 6.4 Tab
**Anatomy:** Tab item (flex col) → [Badge chip] → Label text → [Active indicator underline]
| State | Text | Transition |
|---|---|---|
| Default | `var(--color-text-heading)` | `0.2s cubic-bezier(0, 0, 0.35, 1)` |
| Hover | Inferred: slight opacity or colour shift | Same |
| Active / Selected | Inferred: indicator line or accent colour | Same |
```tsx
// components/Tab.tsx
interface TabProps {
label: string;
badge?: string;
isActive?: boolean;
onClick: () => void;
}
export function Tab({ label, badge, isActive, onClick }: TabProps) {
return (
<button
role="tab"
aria-selected={isActive}
onClick={onClick}
style={{
fontFamily: 'var(--font-primary)',
fontSize: 'var(--customer-font-size-md)', // 16px
fontWeight: 'var(--customer-font-weight-medium)', // 500
lineHeight: '22px',
letterSpacing: '0.2px',
color: 'var(--color-text-heading)',
backgroundColor: 'transparent',
border: 'none',
borderBottom: isActive
? `2px solid var(--color-action-bg)`
: '2px solid transparent',
padding: '16px 0', // var(--customer-space-lg) 0
display: 'flex',
flexDirection: 'column',
alignItems: 'flex-start',
gap: 'var(--customer-space-md)', // 8px
cursor: 'pointer',
transition: '0.2s cubic-bezier(0, 0, 0.35, 1)',
}}
>
{badge && <Badge label={badge} />}
{label}
</button>
);
}
```
---
### 6.5 Marquee / Logo Strip
**Anatomy:** Outer container → Inner scrolling flex row → Logo items (repeated)
- Animation: `@keyframes scroll / marquee` — `translateX(0)` → `translateX(calc(-100% - var(--gap)))`
- Duration: `var(--customer-duration-slow)` = `40s`
- Paused on hover via `animation-play-state: paused`
```tsx
// components/LogoMarquee.tsx
export function LogoMarquee({ logos }: { logos: { src: string; alt: string }[] }) {
return (
<div
className="marquee-container"
style={{ overflow: 'hidden', display: 'flex' }}
>
<div
className="animate-marquee"
style={{
display: 'flex',
gap: 'var(--customer-space-3xl)', // 96px between logos
animation: `scroll var(--customer-duration-slow) linear infinite`, // 40s
animationPlayState: 'running',
}}
>
{[...logos, ...logos].map((logo, i) => (
<img key={i} src={logo.src} alt={logo.alt} height={32} />
))}
</div>
<style>{`
.marquee-container:hover .animate-marquee {
animation-play-state: paused;
}
@keyframes scroll {
0% { transform: translateX(0); }
100% { transform: translateX(calc(-50% - var(--customer-space-3xl) / 2)); }
}
`}</style>
</div>
);
}
```
---
## 7. Elevation & Depth
Customer.io achieves depth primarily through **background colour contrast** (dark teal page vs. slightly lighter teal surface) rather than drop shadows. Shadows appear only as **focus rings** on interactive elements.
```css
:root {
/* ── Shadows ── */
--shadow-none: none;
--shadow-focus-ring: oklch(0.9263 0.136 145.2) 0px 0px 0px 4px;
/* reconstructed: moderate confidence — only shadow value found in extraction */
/* Used exclusively as :focus-visible ring on primary buttons */
/* ── Borders ── */
--border-default: 0px solid var(--color-border); /* structural: 0px = no visible border */
--border-button: 2px solid var(--color-action-border); /* primary button stroke */
--border-dark-card: 1px solid oklch(0.3068 0.046 206.34); /* dark surface card border (inferred) */
/* ── Z-index scale ── */
--z-base: 0;
--z-raised: 10; /* cards, dropdowns */
--z-overlay: 100; /* modals, drawers */
--z-nav: 200; /* sticky navigation */
--z-toast: 300; /* toast notifications */
--z-top: 9999; /* priority overlays */
}
```
### Elevation Principles
- **Cards:** Use `background: var(--color-bg-surface)` on `var(--color-bg-page)` — colour differential creates perceived lift
- **Buttons:** Border (`2px solid`) outlines the pill; no box-shadow in default state — shadow only on focus
- **Dropdowns / nav panels:** Elevated via `z-index: var(--z-raised)` + background `var(--color-bg-surface)`
- **NEVER use `box-shadow: 0 4px 16px rgba(0,0,0,0.2)` style drop shadows** — not present in the extracted design system
---
## 8. Motion
```css
:root {
/* ── Durations ── */
--customer-duration-fast: 0.2s; /* micro-interactions: hover, focus, transforms */
--customer-duration-base: 0.4s; /* page transitions, panel open/close */
--customer-duration-slow: 40s; /* ambient loops: marquee scroll, gradient shift */
/* ── Easing ── */
--customer-ease-default: ease; /* general transitions */
--customer-ease-decel: cubic-bezier(0, 0, 0.35, 1); /* UI motion — snappy start, gentle stop */
/* Note: decel curve used on buttons, tabs, card transforms */
}
/* ── Keyframe library ── */
/* Accordion open/close (Radix UI) */
@keyframes accordion-down {
0% { height: 0px; }
100% { height: var(--radix-accordion-content-height); }
}
@keyframes accordion-up {
0% { height: var(--radix-accordion-content-height); }
100% { height: 0px; }
}
/* Headline text gradient shift */
@keyframes text-gradient {
0%, 100% { background-position: 0px 0px; background-size: 470% 200%; }
50% { background-position: 100% 0px; background-size: 470% 200%; }
}
/* Background gradient animation */
@keyframes gradient {
100% { background-position: var(--bg-size) 0; }
}
/* Logo/content marquee horizontal */
@keyframes marquee {
0% { transform: translateX(0px); }
100% { transform: translateX(calc(-100% - var(--gap))); }
}
/* Marquee vertical variant */
@keyframes marquee-vertical {
0% { transform: translateY(0px); }
100% { transform: translateY(calc(-100% - var(--gap))); }
}
/* Shooting star / meteor effect */
@keyframes meteor {
0% { opacity: 1; transform: rotate(215deg) translate(0px); }
70% { opacity: 1; }
100% { opacity: 0; transform: rotate(215deg) translate(-500px); }
}
/* Border beam (animated gradient border) */
@keyframes border-beam {
100% { offset-distance: 100%; }
}
/* Generic spin */
@keyframes spin {
100% { transform: rotate(1turn); }
}
/* Pulse (opacity throb) */
@keyframes pulse {
50% { opacity: 0.5; }
}
/* Shine sweep */
@keyframes shine {
0% { background-position: 0px 0px; }
50% { background-position: 100% 100%; }
100% { background-position: 0px 0px; }
}
```
### Motion Rules
- **Fast interactions** (`0.2s ease-decel`): hover colour, focus ring, button press, tab switch, card transform
- **Base transitions** (`0.4s ease`): nav panel open, accordion, page-level transitions
- **Ambient loops** (`40s linear`): marquee logo strip, background gradient drift — always use `animation-play-state: paused` on hover
- **Respect `prefers-reduced-motion`:** Ambient loops and gradient animations should be disabled; micro-interactions may be retained at reduced intensity
```css
@media (prefers-reduced-motion: reduce) {
.animate-marquee,
.animate-marquee-vertical {
animation: none;
}
* {
transition-duration: 0.01ms !important;
animation-duration: 0.01ms !important;
}
}
```
---
## 9. Anti-Patterns & Constraints
1. **Hardcoded hex colours → Why it fails → Token instead**
Hardcoding `#2e5c63` means the value exists in 47 places with no single source of truth. When the brand updates its teal, every instance breaks independently and the AI regenerating components will invent a slightly different shade each time.
**Do instead:** Always use `var(--color-bg-surface)` — defined once in `:root`, updated in one place.
2. **`border-radius: 8px` on buttons → Why it fails → Pill only**
AI agents default to `8px` or `12px` rounded rectangles for buttons because it's the most common pattern in training data. Customer.io's brand identity is defined by pill-shaped CTAs (`border-radius: 9999px`). Using `8px` produces a fundamentally different visual character — more generic SaaS, less distinctive brand.
**Do instead:** Always use `var(--customer-radius-lg)` (which resolves to `9999px`) for any primary or secondary CTA button.
3. **`font-weight: 400` (normal) for body text → Why it fails → 475 minimum**
`saansFont` is tuned as a variable font with `weight: 100 800`. Its "regular" reading weight is `475`, not `400`. Rendering at `400` uses a lighter variant that breaks the intended typographic colour and rhythm — text appears too thin against dark backgrounds and loses legibility at small sizes.
**Do instead:** Use `var(--customer-font-weight-regular)` (475) as the minimum weight for all body copy.
4. **Off-grid spacing values → Why it fails → 4px grid strictly**
The extraction found spacing tokens only at 4, 8, 16, 24, 32, 96px. Using arbitrary values like `12px`, `20px`, or `48px` introduces visual inconsistency that compounds — every component drifts slightly off rhythm, making the page feel unpolished even when individual components look correct.
**Do instead:** Choose the nearest token — `--customer-space-sm` (4px), `--customer-space-md` (8px), `--customer-space-lg` (16px), `--customer-space-xl` (24px), `--customer-space-2xl` (32px), `--customer-space-3xl` (96px).
5. **Using `Inter`, `Roboto`, or `Arial` as primary font → Why it fails → saansFont first**
AI agents frequently fall back to `Inter` because it's in most Tailwind/Next.js starters. The Customer.io brand uses `saansFont` — a purpose-built custom variable font with unique weight steps (`475`) that other fonts don't match. Using a substitute changes the entire typographic character of the product.
**Do instead:** Always declare `font-family: var(--font-primary)` which resolves to `'saansFont', 'saansFont Fallback', Arial, sans-serif`. Ensure the font is loaded via `@font-face` with the `/_next/static/media/` WOFF2 path.
6. **Missing `letter-spacing: 0.2px` → Why it fails → Universal tracking**
The extraction shows `letter-spacing: 0.2px` applied to every computed text element — H1 through badge chips. Omitting this makes text appear slightly cramped and inconsistent with the site's optical spacing. AI agents rarely include custom letter-spacing unless explicitly told.
**Do instead:** Include `letter-spacing: 0.2px` in every typography token application — it is not optional.
7. **Applying drop shadows for depth → Why it fails → Use surface colour**
The only `box-shadow` in the extracted system is the focus ring (`oklch(0.9263 0.136 145.2) 0 0 0 4px`). Standard drop-shadow depth (`box-shadow: 0 4px 16px rgba(0,0,0,0.2)`) is absent from the design system. Using it introduces a foreign visual language inconsistent with the brand's depth approach.
**Do instead:** Create depth through background colour contrast — `var(--color-bg-surface)` on `var(--color-bg-page)` — and reserve `box-shadow` exclusively for focus-visible rings.
8. **Dynamic Tailwind class construction → Why it fails → Static classes only**
Writing `` className={`bg-${variant}`} `` or `` `text-${size}-px` `` breaks Tailwind's compile-time class scanning. The JIT compiler cannot detect dynamically constructed class strings, so those classes are stripped from the production bundle and styles are silently missing.
**Do instead:** Use the full class string statically (e.g. `className="bg-teal-900"`) or use `style={{ backgroundColor: 'var(--color-bg-page)' }}` with CSS custom properties, which work at runtime without compilation.
9. **Badge `border-radius: 9999px` → Why it fails → Sharp corners for badges**
The brand uses pill shapes exclusively for CTAs. Badge chips use `border-radius: 2px` (`var(--customer-radius-sm)`). An AI that sees pill buttons will incorrectly apply pill radius to badges — changing them from sharp categorical labels into floating pills that lose their structural grounding within cards.
**Do instead:** Badges always use `var(--customer-radius-sm)` (2px). Only buttons use `var(--customer-radius-lg)` (9999px).
10. **Omitting `prefers-reduced-motion` for marquee/ambient animations → Why it fails → Accessibility**
The `40s` marquee loops and gradient animations are continuous movement. For users with vestibular disorders, constant scrolling content triggers nausea and disorientation. AI agents generating marquee components almost never include reduced-motion handling unprompted.
**Do instead:** Wrap all `@keyframes` on ambient/loop animations in `@media (not prefers-reduced-motion: reduce) { ... }` or explicitly set `animation: none` in the reduced-motion media query.
11. **`!important` to override component styles → Why it fails → Token cascade**
Using `!important` to force a style overrides the cascade that the `--customer-*` token system relies on. It makes the component impossible to theme, test in different states, or override intentionally. It also signals the component's token application is architecturally broken.
**Do instead:** Resolve specificity conflicts by correcting selector depth or scoping — never with `!important`.
---
## Appendix A: Complete Token Reference
Every token extracted from the source. §0 CORE TOKENS is the primary AI signal; this appendix is reference material an AI can cross-check against when a curated role is missing.
```css
/* Colours (39) */
--brand-mark-1: rgb(197, 252, 195); /* Brand mark fill on 6 svg shapes — e.g. "path" /* mined from svg fill */ */
--brand-mark-2: rgb(14, 70, 77); /* Brand mark fill on 1 svg shape — e.g. "path" /* mined from svg fill */ */
--customer-accent: rgb(197, 252, 195);
--customer-bg-app: rgb(14, 70, 77);
--color-bg-dark: oklch(0.245 0.042 207.2);
--color-bg-surface: oklch(0.3068 0.046 206.34);
--color-text-on-dark: oklch(1 0 0);
--color-text-body: rgb(255, 255, 255);
--color-text-muted: rgb(153, 153, 153);
--color-badge-text: oklch(0.5158 0.094 81.3);
--color-badge-bg: oklch(0.9914 0.0088 86.2);
--primitive-teal-900: oklch(0.245 0.042 207.2);
--primitive-teal-700: oklch(0.3068 0.046 206.34);
--primitive-teal-600: rgb(14, 70, 77);
--primitive-mint-300: rgb(197, 252, 195);
--primitive-white: oklch(1 0 0);
--primitive-grey-400: rgb(153, 153, 153);
--primitive-border: oklch(0.94 0 0);
--primitive-amber-600: oklch(0.5158 0.094 81.3);
--primitive-amber-50: oklch(0.9914 0.0088 86.2);
--color-bg-page: oklch(0.245 0.042 207.2);
--color-bg-brand: rgb(14, 70, 77);
--color-text-primary: oklch(1 0 0);
--color-text-heading: oklch(0.245 0.042 207.2);
--color-accent: rgb(197, 252, 195);
--color-brand-mark: var(--primitive-teal-600);
--color-action-bg: oklch(0.3068 0.046 206.34);
--color-action-border: oklch(0.3068 0.046 206.34);
--color-action-ring: oklch(0.9263 0.136 145.2);
--color-action-text: oklch(1 0 0);
--color-border: oklch(0.94 0 0);
--color-border-dark: oklch(0.3068 0.046 206.34);
--button-primary-bg: var(--color-action-bg);
--button-primary-border: var(--color-action-border);
--badge-bg: var(--color-badge-bg);
--nav-bg: transparent;
--border-default: 0px solid var(--color-border);
--border-button: 2px solid var(--color-action-border);
--border-dark-card: 1px solid oklch(0.3068 0.046 206.34);
/* Typography (30) */
--font-size-xs: 12px; /* 38 elements — e.g. span "case study", span "case study", span "case study" /* mined from computed styles */ */
--font-size-sm: 14px; /* 22 elements — e.g. p "The customer engagem", p "Increase in click-th", p "Increase in email co" /* mined from computed styles */ */
--font-size-md: 16px; /* 151 elements — e.g. p "Build automated camp", p "Reach the right peop", p "Use your customer da" /* mined from computed styles */ */
--font-size-lg: 18px; /* 9 elements — e.g. h3 "Build campaigns in a", h3 "Analyze performance ", h3 "Remember everything " /* mined from computed styles */ */
--font-size-xl: 24px; /* 12 elements — e.g. h3 "Activation", h3 "Retention", h3 "Cross-sell & upsell" /* mined from computed styles */ */
--font-size-2xl: 40px; /* 12 elements — e.g. h2 "Everything you need ", h2 "Meet your AI Agent", h2 "Support every stage " /* mined from computed styles */ */
--font-size-3xl: 96px; /* 17 elements — e.g. h1 "More impactfrom ever", span "messagemessage", span "message" /* mined from computed styles */ */
--font-weight-regular: 475; /* 217 elements — e.g. h1 "More impactfrom ever", h2 "Everything you need ", h2 "Meet your AI Agent" /* mined from computed styles */ */
--font-weight-medium: 500; /* 14 elements — e.g. h3 "Build campaigns in a", h3 "Analyze performance ", h3 "Remember everything " /* mined from computed styles */ */
--font-weight-semibold: 600; /* 33 elements — e.g. h3 "Journeys", h3 "Audiences", h3 "Data & integrations" /* mined from computed styles */ */
--font-weight-bold: 700; /* 5 elements — e.g. p "28%", p "22%", p "3.36%" /* mined from computed styles */ */
--line-height-tight: 16.5px; /* 38 elements — e.g. span "case study", span "case study", span "case study" /* mined from computed styles */ */
--line-height-normal: 22px; /* 139 elements — e.g. p "Build automated camp", p "Reach the right peop", p "Use your customer da" /* mined from computed styles */ */
--font-primary: 'saansFont', 'saansFont Fallback', Arial, sans-serif;
--customer-font-size-xs: 12px;
--customer-font-size-sm: 14px;
--customer-font-size-md: 16px;
--customer-font-size-lg: 18px;
--customer-font-size-xl: 24px;
--customer-font-size-2xl: 40px;
--customer-font-size-3xl: 96px;
--customer-font-weight-regular: 475;
--customer-font-weight-medium: 500;
--customer-font-weight-semibold: 600;
--customer-font-weight-bold: 700;
--button-primary-text: var(--color-action-text);
--badge-text: var(--color-badge-text);
--nav-text: var(--color-text-heading);
--customer-line-height-tight: 16.5px;
--customer-line-height-normal: 22px;
/* Spacing (14) */
--space-xs: 1px; /* 48 elements — e.g. ul .bg-stroke, ul .bg-stroke, ul .bg-stroke /* mined from computed styles */ */
--space-sm: 4px; /* 105 elements — e.g. div .flex, div .flex, li .flex /* mined from computed styles */ */
--space-md: 8px; /* 111 elements — e.g. div .flex, div .flex, div .flex /* mined from computed styles */ */
--space-lg: 16px; /* 24 elements — e.g. div .flex, div .flex, div .flex /* mined from computed styles */ */
--space-xl: 24px; /* 117 elements — e.g. div .container, div .container, div .container /* mined from computed styles */ */
--space-2xl: 32px; /* 104 elements — e.g. div .relative, div .relative, div .container /* mined from computed styles */ */
--space-3xl: 96px; /* 31 elements — e.g. section .overflow-x-clip, section .relative, section .relative /* mined from computed styles */ */
--customer-space-sm: 4px;
--customer-space-md: 8px;
--customer-space-lg: 16px;
--customer-space-xl: 24px;
--customer-space-2xl: 32px;
--customer-space-3xl: 96px;
--customer-space-xs: 1px;
/* Radius (8) */
--radius-sm: 2px; /* 37 elements — e.g. button .group/badge "case study", button .group/badge "case study", button .group/badge "case study" /* mined from computed styles */ */
--radius-md: 4px; /* 2 elements — e.g. a .c-button "I accept", a .c-button "I accept" /* mined from computed styles */ */
--radius-lg: 3.35544e+07px; /* 20 elements — e.g. a .group "Sign in", a .group "Get startedGet start", a .group "Book a demoBook a de" /* mined from computed styles */ */
--customer-radius-sm: 2px;
--customer-radius-md: 4px;
--customer-radius-lg: 9999px;
--button-primary-radius: var(--customer-radius-lg);
--badge-radius: var(--customer-radius-sm);
/* Effects (2) */
--shadow-none: none;
--shadow-focus-ring: oklch(0.9263 0.136 145.2) 0px 0px 0px 4px;
/* Motion (17) */
----motion-accordion-down: @keyframes accordion-down {
0% { height: 0px; }
100% { height: var(--radix-accordion-content-height); }
}; /* @keyframes accordion-down */
----motion-accordion-up: @keyframes accordion-up {
0% { height: var(--radix-accordion-content-height); }
100% { height: 0px; }
}; /* @keyframes accordion-up */
----motion-text-gradient: @keyframes text-gradient {
0%, 100% { background-position: 0px 0px; background-size: 470% 200%; }
50% { background-position: 100% 0px; background-size: 470% 200%; }
}; /* @keyframes text-gradient */
----motion-gradient: @keyframes gradient {
100% { background-position: var(--bg-size) 0; }
}; /* @keyframes gradient */
----motion-meteor: @keyframes meteor {
0% { opacity: 1; transform: rotate(215deg) translate(0px); }
70% { opacity: 1; }
100% { opacity: 0; transform: rotate(215deg) translate(-500px); }
}; /* @keyframes meteor */
----motion-shine: @keyframes shine {
0% { background-position: 0px 0px; }
50% { background-position: 100% 100%; }
100% { background-position: 0px 0px; }
}; /* @keyframes shine */
----motion-border-beam: @keyframes border-beam {
100% { offset-distance: 100%; }
}; /* @keyframes border-beam */
----motion-spin: @keyframes spin {
100% { transform: rotate(1turn); }
}; /* @keyframes spin */
----motion-pulse: @keyframes pulse {
50% { opacity: 0.5; }
}; /* @keyframes pulse */
----motion-scroll: @keyframes scroll {
100% { transform: translate(calc(-50% - 0.5rem)); }
}; /* @keyframes scroll */
----motion-nprogress-spinner: @keyframes nprogress-spinner {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}; /* @keyframes nprogress-spinner */
----motion-marquee: @keyframes marquee {
0% { transform: translateX(0px); }
100% { transform: translateX(calc(-100% - var(--gap))); }
}; /* @keyframes marquee */
----motion-marquee-vertical: @keyframes marquee-vertical {
0% { transform: translateY(0px); }
100% { transform: translateY(calc(-100% - var(--gap))); }
}; /* @keyframes marquee-vertical */
--duration-fast: 0.2s; /* 46 elements — e.g. button, button, button /* mined from computed styles */ */
--duration-base: 0.4s; /* 6 elements — e.g. a, a, a /* mined from computed styles */ */
--duration-slow: 40s; /* 8 elements — e.g. div, div, div /* mined from computed styles */ */
--ease-default: ease; /* 117 elements — e.g. button, button, button /* mined from computed styles */ */
```
## Appendix B: Token Source Metadata
```yaml
tokenSource: reconstructed-from-computed
confidence: low
nativeCSSVarsFound: 0
curatedTokensApplied: 29
syntheticTokensAdded: ~35 (primitive + semantic tiers)
reconstructionMethod:
colours: Clustered by oklch hue angle (≈207° = teal family, ≈81° = amber family)
and by luminance (dark surface vs. light badge bg).
Dark backgrounds confirmed by body color: rgb(255,255,255) on dark bg.
spacing: 4px grid confirmed by tokens [4, 8, 16, 24, 32, 96px].
1px treated as hairline/edge-case, not layout unit.
radius: Three-value scale confirmed by element census:
2px (37 elements — badges), 4px (2 elements — cookie/card),
3.35544e+07px (20 elements — pill buttons, normalised to 9999px).
typography: Composite groups assembled from computed element styles (h1–body).
Custom weight 475 confirmed on 217 elements — not a rounding error.
motion: Duration values extracted from computed transition properties.
40s confirmed on 8 div elements — ambient animation, not error.
fontDeclaration:
family: saansFont (custom variable font, weight 100–800)
fallback: 'saansFont Fallback' → local('Arial')
format: woff2
path: /_next/static/media/13d948bc5b1ae448-s.p.woff2
display: swap
radiusNote: |
The extracted value 3.35544e+07px is a browser-rendered value for CSS `border-radius: 50%`
or an extremely large pixel value used as a pill shorthand. Normalised to 9999px for
cross-browser compatibility. Do not use 3.35544e+07px in generated code.
confidenceAnnotations:
button_primary_ring_colour: moderate # single element, critical for brand
h3_dark_card_font_size: moderate # 20px computed, between xl and lg scale
container_max_width: low/inferred # not extracted, inferred from Tailwind xl
section_heights: low/inferred # no screenshots provided
hover_states: low/inferred # CSS rules only showed marquee pause, not button hover
detectedLibraries:
- tailwind (v3 assumed — no CSS vars in @theme block found)
- bootstrap (detected but minimal influence on extracted tokens)
- radix-ui (inferred from accordion keyframe variable names)
figmaSource: none
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