---
version: alpha
name: ClickHouse
description: A high-performance database interface anchored on near-pure black canvas with electric yellow as the brand voltage. White typography in confident sans, yellow CTAs, and yellow-text stat numbers carry the brand voice across every page. Code blocks and product UI fragments embed directly in dark cards. The yellow + black pairing (and yellow used scarcely as accent) is the system's signature — brand identity without atmospheric decoration.

colors:
  primary: "#faff69"
  primary-active: "#e6eb52"
  primary-disabled: "#3a3a1f"
  ink: "#ffffff"
  body: "#cccccc"
  body-strong: "#e6e6e6"
  muted: "#888888"
  muted-soft: "#5a5a5a"
  hairline: "#2a2a2a"
  hairline-strong: "#3a3a3a"
  canvas: "#0a0a0a"
  surface-soft: "#121212"
  surface-card: "#1a1a1a"
  surface-elevated: "#242424"
  surface-yellow-band: "#faff69"
  on-primary: "#0a0a0a"
  on-dark: "#ffffff"
  on-yellow: "#0a0a0a"
  accent-emerald: "#22c55e"
  accent-rose: "#ef4444"
  accent-blue: "#3b82f6"
  success: "#22c55e"
  warning: "#f59e0b"
  error: "#ef4444"

typography:
  display-xl:
    fontFamily: "Inter, sans-serif"
    fontSize: 72px
    fontWeight: 700
    lineHeight: 1.05
    letterSpacing: -2.5px
  display-lg:
    fontFamily: "Inter, sans-serif"
    fontSize: 56px
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: -2px
  display-md:
    fontFamily: "Inter, sans-serif"
    fontSize: 40px
    fontWeight: 700
    lineHeight: 1.15
    letterSpacing: -1.5px
  display-sm:
    fontFamily: "Inter, sans-serif"
    fontSize: 32px
    fontWeight: 700
    lineHeight: 1.2
    letterSpacing: -1px
  title-lg:
    fontFamily: "Inter, sans-serif"
    fontSize: 24px
    fontWeight: 700
    lineHeight: 1.3
    letterSpacing: -0.3px
  title-md:
    fontFamily: "Inter, sans-serif"
    fontSize: 18px
    fontWeight: 600
    lineHeight: 1.4
    letterSpacing: 0
  title-sm:
    fontFamily: "Inter, sans-serif"
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.4
    letterSpacing: 0
  stat-display:
    fontFamily: "Inter, sans-serif"
    fontSize: 56px
    fontWeight: 700
    lineHeight: 1.0
    letterSpacing: -1.5px
  body-md:
    fontFamily: "Inter, sans-serif"
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: 0
  body-sm:
    fontFamily: "Inter, sans-serif"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: 0
  caption:
    fontFamily: "Inter, sans-serif"
    fontSize: 13px
    fontWeight: 500
    lineHeight: 1.4
    letterSpacing: 0
  caption-uppercase:
    fontFamily: "Inter, sans-serif"
    fontSize: 12px
    fontWeight: 600
    lineHeight: 1.4
    letterSpacing: 1.5px
  code:
    fontFamily: "JetBrains Mono, ui-monospace, monospace"
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: 0
  button:
    fontFamily: "Inter, sans-serif"
    fontSize: 14px
    fontWeight: 600
    lineHeight: 1
    letterSpacing: 0
  nav-link:
    fontFamily: "Inter, sans-serif"
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.4
    letterSpacing: 0

rounded:
  xs: 4px
  sm: 6px
  md: 8px
  lg: 12px
  pill: 9999px
  full: 9999px

spacing:
  xxs: 4px
  xs: 8px
  sm: 12px
  md: 16px
  lg: 24px
  xl: 32px
  xxl: 48px
  section: 96px

components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.button}"
    rounded: "{rounded.md}"
    padding: 12px 20px
    height: 40px
  button-primary-active:
    backgroundColor: "{colors.primary-active}"
    textColor: "{colors.on-primary}"
    rounded: "{rounded.md}"
  button-primary-disabled:
    backgroundColor: "{colors.primary-disabled}"
    textColor: "{colors.muted}"
    rounded: "{rounded.md}"
  button-secondary:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.button}"
    rounded: "{rounded.md}"
    padding: 12px 20px
    height: 40px
  button-text-link:
    backgroundColor: transparent
    textColor: "{colors.on-dark}"
    typography: "{typography.button}"
  button-icon-circular:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    rounded: "{rounded.full}"
    size: 36px
  text-link:
    backgroundColor: transparent
    textColor: "{colors.primary}"
    typography: "{typography.body-md}"
  top-nav:
    backgroundColor: "{colors.canvas}"
    textColor: "{colors.on-dark}"
    typography: "{typography.nav-link}"
    height: 64px
  hero-band:
    backgroundColor: "{colors.canvas}"
    textColor: "{colors.on-dark}"
    typography: "{typography.display-xl}"
    padding: 96px
  hero-stat-card:
    backgroundColor: "{colors.canvas}"
    textColor: "{colors.primary}"
    typography: "{typography.stat-display}"
  feature-card-yellow:
    backgroundColor: "{colors.surface-yellow-band}"
    textColor: "{colors.on-yellow}"
    typography: "{typography.title-md}"
    rounded: "{rounded.lg}"
    padding: 32px
  feature-card-dark:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.title-md}"
    rounded: "{rounded.lg}"
    padding: 32px
  code-window-card:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.code}"
    rounded: "{rounded.lg}"
    padding: 24px
  product-mockup-card:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.title-md}"
    rounded: "{rounded.lg}"
    padding: 24px
  pricing-tier-card:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.title-lg}"
    rounded: "{rounded.lg}"
    padding: 32px
  pricing-tier-card-featured:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.title-lg}"
    rounded: "{rounded.lg}"
    padding: 32px
  stat-callout:
    backgroundColor: transparent
    textColor: "{colors.primary}"
    typography: "{typography.stat-display}"
  cta-band-yellow:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.display-md}"
    rounded: "{rounded.lg}"
    padding: 64px
  text-input:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.body-md}"
    rounded: "{rounded.md}"
    padding: 10px 14px
    height: 40px
  text-input-focused:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    rounded: "{rounded.md}"
  category-tab:
    backgroundColor: transparent
    textColor: "{colors.muted}"
    typography: "{typography.nav-link}"
    rounded: "{rounded.md}"
    padding: 8px 14px
  category-tab-active:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.nav-link}"
    rounded: "{rounded.md}"
  badge-pill:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.caption}"
    rounded: "{rounded.pill}"
    padding: 4px 12px
  badge-yellow:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.caption-uppercase}"
    rounded: "{rounded.pill}"
    padding: 4px 12px
  events-card:
    backgroundColor: "{colors.surface-card}"
    textColor: "{colors.on-dark}"
    typography: "{typography.title-md}"
    rounded: "{rounded.lg}"
    padding: 24px
  customer-logo-strip:
    backgroundColor: "{colors.canvas}"
    textColor: "{colors.muted}"
    typography: "{typography.body-md}"
    padding: 32px
  footer:
    backgroundColor: "{colors.canvas}"
    textColor: "{colors.muted}"
    typography: "{typography.body-sm}"
    padding: 64px
---

## Overview

ClickHouse's marketing surface is the highest-contrast interface in the database / data-platform category. The base atmosphere is **near-pure black canvas** (`{colors.canvas}` — #0a0a0a) with **electric yellow** (`{colors.primary}` — #faff69) as the singular brand voltage. The yellow handles every primary CTA, every stat-callout number, every "GET STARTED" badge — used scarcely on individual elements but generously on full-bleed yellow CTA cards. White typography in confident weight-700 sans-serif anchors the editorial body.

The yellow + black pairing is what makes ClickHouse instantly recognizable. Where Snowflake uses cool blue gradients and Databricks uses red + slate, ClickHouse leans hard into one electric yellow that does all the brand work. Code blocks, terminal output, and product UI fragments embed directly in dark `{colors.surface-card}` (#1a1a1a) cards across every page.

Type voice runs **Inter** at confident weights — 700 for display headlines (with negative letter-spacing -1 to -2.5px), 600 for sub-titles and buttons, 400 for body. The system has no display-serif counter-voice; everything is one geometric humanist sans, scaled and weighted for hierarchy.

**Key Characteristics:**
- Near-pure black canvas (`{colors.canvas}` — #0a0a0a) with white type. The system has no light-mode marketing surface.
- Electric yellow primary (`{colors.primary}` — #faff69). Used on primary CTAs, large stat-callout numbers ("2.8k+", "74k+"), and full-bleed yellow CTA bands.
- Inter at weight 700 for display, weight 600 for sub-titles + buttons, weight 400 for body. No serif counterpoint.
- Dark surface cards (`{colors.surface-card}` — #1a1a1a) for feature cards, code windows, and product mockups. Cards barely lighter than canvas — color-block contrast is subtle.
- Code blocks render in JetBrains Mono inside `{colors.surface-card}`. SQL syntax-highlighted in muted blues / yellows / grays.
- Stat numbers in yellow + sans-700 + huge size carry the credibility moment ("779+", "2.8k+", "47k+" community / contributor / star counts).
- Border radius is hierarchical: `{rounded.md}` (8px) for buttons, `{rounded.lg}` (12px) for content cards. No pill except in tag badges.
- Section rhythm `{spacing.section}` (96px) between major editorial bands.

## Colors

### Brand & Accent
- **Primary (Electric Yellow)** (`{colors.primary}` — #faff69): The signature brand color. All primary CTA backgrounds, large stat-callout numbers, full-bleed yellow CTA cards. The yellow is the brand.
- **Primary Active** (`{colors.primary-active}` — #e6eb52): Press / hover-darker variant.
- **Primary Disabled** (`{colors.primary-disabled}` — #3a3a1f): Desaturated dark-yellow on dark canvas.

### Surface
- **Canvas** (`{colors.canvas}` — #0a0a0a): The default page floor. Near-pure black.
- **Surface Soft** (`{colors.surface-soft}` — #121212): Section dividers, very-soft band tints.
- **Surface Card** (`{colors.surface-card}` — #1a1a1a): Feature cards, code windows, product mockups, pricing tier cards.
- **Surface Elevated** (`{colors.surface-elevated}` — #242424): Nested cards inside larger dark cards.
- **Surface Yellow Band** (`{colors.surface-yellow-band}` — #faff69): The yellow CTA card / band fill — same hex as primary.
- **Hairline** (`{colors.hairline}` — #2a2a2a): 1px borders on cards.
- **Hairline Strong** (`{colors.hairline-strong}` — #3a3a3a): Heavier divider on input underlines and emphasis.

### Text
- **Ink / On Dark** (`{colors.on-dark}` — #ffffff): All headline and primary text.
- **Body** (`{colors.body}` — #cccccc): Default running-text color.
- **Body Strong** (`{colors.body-strong}` — #e6e6e6): Emphasized paragraphs.
- **Muted** (`{colors.muted}` — #888888): Footer links, captions, breadcrumbs.
- **Muted Soft** (`{colors.muted-soft}` — #5a5a5a): Tertiary text — fine print.
- **On Primary / On Yellow** (`{colors.on-primary}` / `{colors.on-yellow}` — #0a0a0a): Black text on yellow CTAs and yellow CTA bands. The high-contrast yellow + black combo is the brand action signal.

### Semantic / Accent
- **Accent Emerald** (`{colors.accent-emerald}` — #22c55e): Success states, "active" status indicators in product UI.
- **Accent Rose** (`{colors.accent-rose}` — #ef4444): Error states, "down" indicators.
- **Accent Blue** (`{colors.accent-blue}` — #3b82f6): Info states, code-syntax highlighting.

## Typography

### Font Family
The system runs **Inter** for everything — display, body, navigation, buttons, captions. **JetBrains Mono** handles code blocks. The fallback stack walks `-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif`.

The single-family approach is deliberate: Inter at weight 700 + 600 + 400 covers the entire hierarchy without needing a serif or display counter-voice. The geometric humanist character of Inter at confident bold weight gives ClickHouse a precise, engineered feel that matches the database's performance-first positioning.

### Hierarchy

| Token | Size | Weight | Line Height | Letter Spacing | Use |
|---|---|---|---|---|---|
| `{typography.display-xl}` | 72px | 700 | 1.05 | -2.5px | Homepage h1 ("The leading database for AI") |
| `{typography.display-lg}` | 56px | 700 | 1.1 | -2px | Section heads |
| `{typography.display-md}` | 40px | 700 | 1.15 | -1.5px | Sub-section heads, CTA-band heads |
| `{typography.display-sm}` | 32px | 700 | 1.2 | -1px | Card titles, pricing tier prices |
| `{typography.title-lg}` | 24px | 700 | 1.3 | -0.3px | Pricing plan names, larger feature titles |
| `{typography.title-md}` | 18px | 600 | 1.4 | 0 | Card titles, intro paragraphs |
| `{typography.title-sm}` | 16px | 600 | 1.4 | 0 | Small card titles, list labels |
| `{typography.stat-display}` | 56px | 700 | 1.0 | -1.5px | Stat callouts ("779+", "47k+") — ALWAYS yellow |
| `{typography.body-md}` | 16px | 400 | 1.55 | 0 | Default running-text |
| `{typography.body-sm}` | 14px | 400 | 1.55 | 0 | Footer body, fine-print |
| `{typography.caption}` | 13px | 500 | 1.4 | 0 | Badge labels, captions |
| `{typography.caption-uppercase}` | 12px | 600 | 1.4 | 1.5px | Section labels, "NEW" badges |
| `{typography.code}` | 14px | 400 | 1.55 | 0 | Code blocks — JetBrains Mono |
| `{typography.button}` | 14px | 600 | 1.0 | 0 | Standard button labels |
| `{typography.nav-link}` | 14px | 500 | 1.4 | 0 | Top-nav menu items |

### Principles
Display weights stay at 700 across all sizes. Negative letter-spacing (-1 to -2.5px) is essential — Inter at weight 700 without negative tracking reads as too wide / Apple-marketing. The tightened tracking gives ClickHouse the precise, engineered feel.

Body and labels stay at weights 400 / 500 / 600. The hierarchy is built on size + weight, not on family contrast.

### Note on Font Substitutes
Inter is open-source and the documented choice. **Söhne** is a close commercial alternative if licensed. **Geist** is another modern alternative.

## Layout

### Spacing System
- **Base unit:** 4px.
- **Tokens:** `{spacing.xxs}` 4px · `{spacing.xs}` 8px · `{spacing.sm}` 12px · `{spacing.md}` 16px · `{spacing.lg}` 24px · `{spacing.xl}` 32px · `{spacing.xxl}` 48px · `{spacing.section}` 96px.
- **Section padding:** `{spacing.section}` (96px) between major bands.
- **Card internal padding:** `{spacing.xl}` (32px) for feature cards, pricing tiers; `{spacing.lg}` (24px) for code-window cards and event cards.

### Grid & Container
- **Max content width:** ~1280px centered.
- **Editorial body:** Single 12-column grid; hero often uses 7/5 split (h1 left, code mockup right).
- **Feature card grids:** 3-up at desktop, 2-up at tablet, 1-up at mobile.
- **Pricing grid:** 3-4 up at desktop, 1-up at mobile.

### Whitespace Philosophy
ClickHouse uses dense, slightly-compressed whitespace appropriate for a developer-tooling brand — generous enough to read editorially, tight enough to feel "engineering-grade" rather than "marketing-soft." Section rhythm at 96px is standard; card internal padding stays at 32px for feature cards.

## Elevation & Depth

| Level | Treatment | Use |
|---|---|---|
| Flat | No shadow, no border | Body sections, top nav, hero |
| Soft hairline | 1px `{colors.hairline}` border | Code-window cards, content cards |
| Surface card | `{colors.surface-card}` background — no shadow | Feature cards, pricing tiers, event cards |
| Yellow band | `{colors.primary}` background — no shadow | Full-bleed yellow CTA cards / bands |

The system uses no drop shadows. Depth comes from the contrast between black canvas and `{colors.surface-card}` (a barely-lighter-than-canvas tone) — the contrast is subtle, more like an "engineering-grade dim panel" than an "elevated card."

### Decorative Depth
- Code-window cards carry their own internal product chrome — line numbers, syntax highlighting, status bars at the bottom — adding visual density without external shadows.
- The yellow-on-black contrast does most of the elevation work for CTAs.

## Shapes

### Border Radius Scale

| Token | Value | Use |
|---|---|---|
| `{rounded.xs}` | 4px | Reserved for badge accents |
| `{rounded.sm}` | 6px | Small inline buttons |
| `{rounded.md}` | 8px | Standard CTA buttons, text inputs |
| `{rounded.lg}` | 12px | Content cards, code-window cards, pricing tiers |
| `{rounded.pill}` | 9999px | Badge pills |
| `{rounded.full}` | 9999px / 50% | Avatars, icon buttons |

## Components

### Top Navigation

**`top-nav`** — Black nav bar pinned to top. 64px tall, `{colors.canvas}` background. Carries the ClickHouse logo + wordmark at left, primary horizontal menu (Product, Use Cases, Pricing, Resources, Customers) center-left, right-side cluster with "Sign in" + "Get Started" `{component.button-primary}` (yellow). Menu items in `{typography.nav-link}` (Inter 14px / 500).

### Buttons

**`button-primary`** — The signature yellow CTA. Background `{colors.primary}` (#faff69), text `{colors.on-primary}` (black), type `{typography.button}` (Inter 14px / 600), padding 12px × 20px, height 40px, rounded `{rounded.md}` (8px). The yellow + black combination is iconic.

**`button-secondary`** — Dark surface card button. Background `{colors.surface-card}`, text `{colors.on-dark}`, same shape as primary.

**`button-text-link`** — Inline text button, no background. Used for "Sign in" and inline link CTAs.

**`text-link`** — Inline body links in `{colors.primary}` (yellow on dark). Underlined.

**`button-icon-circular`** — 36 × 36 circular icon button on dark.

### Cards & Containers

**`hero-band`** — Black-canvas hero with 7-5 grid: h1 + sub-headline + button row on the left, code-window or product mockup on the right. Vertical padding `{spacing.section}` (96px).

**`hero-stat-card`** — Yellow stat-display numbers ("779+", "47k+") inline on the canvas. No card surface — just yellow text in `{typography.stat-display}` (56px / 700).

**`feature-card-yellow`** — Full-bleed yellow card ("Built for every modern data challenge"). Background `{colors.primary}`, text `{colors.on-yellow}` (black), rounded `{rounded.lg}` (12px), padding `{spacing.xl}` (32px). The yellow card IS the visual emphasis.

**`feature-card-dark`** — Standard dark feature card. Background `{colors.surface-card}`, text `{colors.on-dark}`, rounded `{rounded.lg}`, padding `{spacing.xl}` (32px).

**`code-window-card`** — Dark card showing a SQL code block. Background `{colors.surface-card}`, code in JetBrains Mono with syntax highlighting, rounded `{rounded.lg}`, padding `{spacing.lg}` (24px). Often the hero's right-side artifact on developer-focused pages.

**`product-mockup-card`** — Card showing actual ClickHouse product UI (query editor, dashboard, monitoring panel). Same shape as `{component.feature-card-dark}` but with embedded product chrome inside.

**`pricing-tier-card`** — Standard tier card. Background `{colors.surface-card}`, rounded `{rounded.lg}`, padding `{spacing.xl}` (32px).

**`pricing-tier-card-featured`** — The featured tier flips to `{colors.primary}` (yellow). The yellow surface IS the featured signal.

**`stat-callout`** — Inline yellow stat numbers ("779+", "2.8k+", "47k+"). Transparent background, text `{colors.primary}`, type `{typography.stat-display}`. Used as a flat layout block, not a card with surface.

**`events-card`** — Used on /company/events. Dark card with event title, date in `{typography.caption-uppercase}`, location, and a "Register" CTA. Rounded `{rounded.lg}`, padding `{spacing.lg}`.

**`customer-logo-strip`** — Horizontal monochrome customer-logo strip. Background `{colors.canvas}`, logos in `{colors.muted}`, vertical padding `{spacing.xl}` (32px).

### Inputs & Forms

**`text-input`** — Dark text input. Background `{colors.surface-card}`, text `{colors.on-dark}`, rounded `{rounded.md}` (8px), padding 10px × 14px, height 40px.

**`text-input-focused`** — Border thickens to `{colors.primary}` (yellow) for emphasis.

### Tags / Badges

**`badge-pill`** — Small dark pill label. Background `{colors.surface-card}`, text `{colors.on-dark}`, type `{typography.caption}`, rounded `{rounded.pill}`.

**`badge-yellow`** — Yellow pill for "NEW", "GET STARTED" emphasis. Background `{colors.primary}`, text `{colors.on-primary}`, type `{typography.caption-uppercase}`, rounded `{rounded.pill}`.

### Tab / Filter

**`category-tab`** + **`category-tab-active`** — Dark tab navigation. Inactive: transparent + muted text. Active: surface-card background + on-dark text. Padding 8px × 14px, rounded `{rounded.md}`.

### CTA / Footer

**`cta-band-yellow`** — A pre-footer "Deploy your way" CTA band. Full yellow fill, black type, rounded `{rounded.lg}`, padding 64px. Carries an h2 in `{typography.display-md}` and a CTA — usually a black-button on the yellow surface.

**`footer`** — Black footer that closes every page. Background `{colors.canvas}`, text `{colors.muted}`. 4-column link list at desktop covering Product / Use Cases / Resources / Company. Vertical padding 64px. The ClickHouse wordmark sits at the top in `{colors.on-dark}`.

## Do's and Don'ts

### Do
- Anchor every page on the black canvas. The yellow + black pairing is the brand voltage.
- Reserve `{colors.primary}` (yellow) for primary CTAs, stat-callout numbers, and full-bleed yellow CTA bands. The yellow's scarcity at the element level + abundance at the band level is what makes it powerful.
- Use Inter at weight 700 for every display headline, with -1 to -2.5px letter-spacing.
- Show actual SQL code blocks inside `{component.code-window-card}` — ClickHouse is a database; show the query, don't paint marketing illustrations of queries.
- Use `{component.stat-callout}` numbers to establish credibility (community size, contributors, performance benchmarks). The yellow stat numbers are signature.
- Anchor every band with `{spacing.section}` (96px) vertical rhythm.

### Don't
- Don't introduce a second brand color. ClickHouse is monochromatic + yellow.
- Don't bold display weight beyond 700 or use weight 500 for headlines. The hierarchy depends on size, not on weight gradation.
- Don't use yellow for body text or large surface fills outside of intentional yellow cards.
- Don't use rounded buttons / pills outside of small badges. The standard button radius is 8px (md).
- Don't repeat the same surface mode in two consecutive bands. Black canvas → dark feature card → yellow CTA card → black canvas → code-window card.
- Don't replace SQL code mockups with abstract illustrations. The code IS the marketing voltage.
- Don't add hover state styling beyond what the system already encodes.

## Responsive Behavior

### Breakpoints

| Name | Width | Key Changes |
|---|---|---|
| Mobile | < 768px | Hamburger nav; hero h1 72→36px; code-window-card stacks below; feature grids 1-up; pricing 1-up |
| Tablet | 768–1024px | Top nav tightens; feature cards 2-up; pricing 2-up |
| Desktop | 1024–1440px | Full top-nav; 3-up feature cards; 3-4 up pricing tiers |
| Wide | > 1440px | Same as desktop with more breathing room; max content 1280px |

### Touch Targets
- `{component.button-primary}` at minimum 40 × 40px.
- `{component.button-icon-circular}` at exactly 36 × 36 — slightly under WCAG 44, visually centered.
- `{component.text-input}` height is 40px.

### Collapsing Strategy
- Top nav collapses to hamburger at < 768px.
- Hero 7-5 grid → single-column on mobile.
- Feature card grids reduce columns rather than scaling.
- Code-window cards retain font-size; horizontal scroll inside the card on mobile.
- Pricing tier cards collapse 4 → 2 → 1; featured tier yellow stays distinct.

### Image Behavior
- Code blocks inside dark mockups stay at fixed font-size; horizontal scroll on mobile rather than wrapping.
- Customer logos in monochrome strip retain native widths; row wraps on mobile.

## Iteration Guide

1. Focus on ONE component at a time. Reference its YAML key (`{component.code-window-card}`, `{component.pricing-tier-card-featured}`).
2. Variants of an existing component (`-active`, `-disabled`, `-focused`) live as separate entries.
3. Use `{token.refs}` everywhere — never inline hex.
4. Never document hover. Default and Active/Pressed states only.
5. Display headlines stay Inter 700 with negative letter-spacing. Body stays Inter 400.
6. The yellow + black pairing is the brand contract. Don't soften with secondary accents.
7. When in doubt about emphasis: bigger Inter 700 before adding color.

## Known Gaps

- The exact yellow hex (#faff69) was sampled from the screenshot; ClickHouse may publish an official brand color slightly differently.
- Inter weight axis values beyond 400 / 500 / 600 / 700 are not formalized — only the static weights observed are documented.
- Animation and transition timings (code typewriter effects, stat counter animations) are not in scope.
- Form validation states beyond `{component.text-input-focused}` are not extracted.
- The actual ClickHouse Cloud product surface (query console, monitoring dashboards, table browser) shares some tokens with the marketing site but adds many product-specific components that are out of scope.
- The customer logo strip's exact opacity / treatment varies — the muted gray is approximate.
