<!-- SPDX-License-Identifier: MIT -->
<!-- SPDX-FileCopyrightText: 2025-2026 Marcus Quinn -->

# Design System: Developer Dark

Terminal-native dark interface for developers. Deep grey backgrounds (`#111827`), terminal-green accent (`#4ade80`), monospace-first typography (JetBrains Mono), 4px spacing grid, border-driven depth.

## Chapters

| File | Contents |
|------|----------|
| [01-theme.md](01-theme.md) | Visual theme, atmosphere, key characteristics |
| [02-colours.md](02-colours.md) | Full colour palette — backgrounds, text, accent, semantic, borders, shadows |
| [03-typography.md](03-typography.md) | Font families, type scale, typography principles |
| [04-components.md](04-components.md) | Buttons, inputs, links, cards, navigation |
| [05-layout.md](05-layout.md) | Spacing scale, grid, breakpoints, border radius |
| [06-elevation.md](06-elevation.md) | Depth levels, shadow values, elevation philosophy |
| [07-dos-donts.md](07-dos-donts.md) | Usage rules — what to do and avoid |
| [08-responsive.md](08-responsive.md) | Breakpoint behaviour, touch targets, mobile rules |
| [09-agent-prompts.md](09-agent-prompts.md) | CSS variable quick reference, ready-to-use prompts |

## Quick Reference

**Colours:** `#111827` bg · `#4ade80` accent (green) · `#fbbf24` secondary (amber) · `#ef4444` error · `#f9fafb` text

**Type:** JetBrains Mono (headings/code/buttons) · Inter (body) · Display 36px/700 · Body 15px/400

**Radius:** 4px default · 6px code blocks · 9999px pills

**Spacing:** 4px base unit · compact by default

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