---
name: Tailwind CSS
description: "A masterclass in developer-focused design that balances power with approachability through clean typography and generous spacing."
version: alpha

colors:
  background: "#ffffff"
  primary: "#111827"
  secondary: "#374151"
  tertiary: "#0ea5e9"
  neutral: "#6b7280"
  bg-soft: "#f9fafb"
  bg-quiet: "#f3f4f6"
  muted-soft: "#9ca3af"
  line: "rgba(0, 0, 0, 0.05)"

typography:
  display:
    fontFamily: humanist-sans
    fontSize: 72px
    lineHeight: 1.0
    fontWeight: 700
    letterSpacing: "-2px"
  h1:
    fontFamily: humanist-sans
    fontSize: 48px
    lineHeight: 1.1
    fontWeight: 600
    letterSpacing: "-1.5px"
  h2:
    fontFamily: humanist-sans
    fontSize: 32px
    lineHeight: 1.2
    fontWeight: 600
    letterSpacing: "-1px"
  body-lg:
    fontFamily: humanist-sans
    fontSize: 20px
    lineHeight: 1.5
    fontWeight: 400
    letterSpacing: "normal"
  body:
    fontFamily: humanist-sans
    fontSize: 16px
    lineHeight: 1.5
    fontWeight: 400
    letterSpacing: "normal"
  code:
    fontFamily: humanist-sans
    fontSize: 14px
    lineHeight: 1.6
    fontWeight: 400
    letterSpacing: "0"
  caption:
    fontFamily: humanist-sans
    fontSize: 13px
    lineHeight: 1.5
    fontWeight: 500
    letterSpacing: "0.2px"

rounded:
  sm: 4px
  md: 8px
  lg: 12px
  pill: 999px

spacing:
  xs: 4px
  sm: 8px
  md: 12px
  lg: 16px
  xl: 20px
  2xl: 24px
  3xl: 32px

---

## Overview

A utility-first CSS framework for rapidly building modern websites.

*A precision toolset for web developers that feels both powerful and approachable.*

## Colors

High-contrast, monochromatic base with a single vibrant sky-blue accent for code and interactive elements.

- **Background (`#ffffff`)** — uses `bg` token
- **Primary text (`#111827`)** — uses `ink` token
- **Secondary text (`#374151`)** — uses `ink-soft` token
- **Accent (`#0ea5e9`)** — uses `accent` token
- **Muted (`#6b7280`)** — uses `muted` token
- **Borders (`rgba(0, 0, 0, 0.05)`)** — uses `line` token

## Typography

- **Display:** humanist-sans
- **Body:** humanist-sans
- **Mono:** monospace

- Headlines use tight letter-spacing (-2px to -1px) for a modern, dense feel.
- Body text maintains a comfortable 1.5 line-height for readability.
- Code blocks use a distinct monospace font for clear differentiation.

## Layout

Centered, single-column hero flowing into a responsive grid for feature cards.

*Rhythm:* Consistent 4px grid with generous padding in feature cards and clear separation between sections.

## Elevation & Depth

- 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1)
- inset 0 0 0 1px rgba(0, 0, 0, 0.1)
- inset 0 0 0 1px rgba(255, 255, 255, 0.1)
- inset 0 0 0 1px rgba(0, 0, 0, 0.05)
- Borders: 1px solid rgba(0, 0, 0, 0.05) for containers, with subtle inset borders for interactive elements.

## Shapes

- `sm`: 4px
- `md`: 8px
- `lg`: 12px
- `pill`: 999px

## Components

- **button:** Solid black 'Get started' button with white text and rounded pill shape.
- **card:** White cards with subtle rounded corners (12-16px) and very light inset or drop shadows, containing code snippets and feature descriptions.
- **chip:** Inline code tags with light gray background, blue text, and small rounded corners.
- **input:** Search bar with light border, rounded corners, and a subtle keyboard shortcut indicator.
- **hero:** Massive left-aligned typography with a clear hierarchy, followed by two action buttons.

## Do's and Don'ts

**Don't:**
- don't use gradient backgrounds — screenshot shows a clean, solid white background with no gradients.
- don't use serif typography — screenshot shows humanist-sans fonts for all display and body text.
- don't use heavy drop shadows — screenshot shows very subtle, light shadows for depth.
- don't use multiple accent colors — screenshot shows a single sky-blue accent (#0ea5e9) for interactive code elements.
- don't use complex decorative borders — screenshot shows simple, light 1px borders or no borders at all.
- don't use centered hero text — screenshot shows a strong left-aligned headline and body copy.

---

## System Prompt (paste into AI agent)

```
This is the website for Tailwind CSS, a utility-first CSS framework. It positions itself as a modern, efficient tool for developers to build websites rapidly. The visual design is clean, professional, and content-focused. Key colors include a crisp white background (#ffffff), near-black text (#111827), and a vibrant sky-blue accent (#0ea5e9) for code highlights. Typography uses humanist-sans fonts for clarity, with a bold display style featuring tight letter-spacing. Critical design constraints include: never use centered headlines (the layout is strongly left-aligned), avoid multiple accent colors (stick to the single blue), and maintain generous whitespace. The site uses a 12-column grid with a 24px gutter and features cards with subtle rounded corners (12-16px) and minimal shadows.
```