ClickHouse design.md

## 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