---
name: Arc Browser
description: "This site is worth including for its masterful blend of warmth, playfulness, and modern design that feels genuinely approachable."
version: alpha

colors:
  background: "#FFFCF7"
  primary: "#000000"
  tertiary: "#3139FB"
  neutral: "#696969"
  line: "rgba(0, 0, 0, 0.1)"

typography:
  display:
    fontFamily: transitional-serif
    fontSize: 56px
    lineHeight: 1.0
    fontWeight: 700
    letterSpacing: "-1.4px"
  heading:
    fontFamily: humanist-sans
    fontSize: 28px
    lineHeight: 1.2
    fontWeight: 700
    letterSpacing: "-0.28px"
  body:
    fontFamily: humanist-sans
    fontSize: 16px
    lineHeight: 1.6
    fontWeight: 400
    letterSpacing: "0.4px"
  caption:
    fontFamily: humanist-sans
    fontSize: 12px
    lineHeight: 1.4
    fontWeight: 500
    letterSpacing: "0.4px"

rounded:
  sm: 4px
  md: 8px
  lg: 22px
  pill: 999px

spacing:
  xs: 4px
  sm: 8px
  md: 12px
  lg: 16px
  xl: 24px
  2xl: 32px
  3xl: 48px

---

## Overview

A warm, expressive browser experience that blends playful personality with modern productivity.

*A friendly, creative studio workspace that feels personal and inviting.*

## Colors

Warm off-white base with vibrant blue accent, using subtle noise textures for depth.

- **Background (`#FFFCF7`)** — uses `bg` token
- **Primary text (`#000000`)** — uses `ink` token
- **Accent (`#3139FB`)** — uses `accent` token
- **Muted (`#696969`)** — uses `muted` token
- **Borders (`rgba(0, 0, 0, 0.1)`)** — uses `line` token

## Typography

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

- Use transitional-serif for large display headlines to create warmth.
- Use humanist-sans for body copy to maintain readability.
- Apply generous negative tracking to display sizes.

## Layout

Standard 12-column grid with responsive behavior, generous whitespace.

*Rhythm:* Consistent 4px base with generous padding around interactive elements.

## Elevation & Depth

- 0px 5px 5px 0px rgba(0, 0, 0, 0.1)
- 0px 2px 8px 0px rgba(0, 0, 0, 0.25)
- Borders: Subtle 1px solid borders, often using the accent blue for emphasis.

## Shapes

- `sm`: 4px
- `md`: 8px
- `lg`: 22px
- `pill`: 999px

## Components

- **button:** Dark filled buttons with pill shape and playful icon integration.
- **card:** Light cards with subtle noise texture and soft shadows.
- **chip:** Small rounded labels with accent colors.
- **input:** Clean text inputs with minimal styling.
- **hero:** Large expressive headline with warm gradient background and noise overlay.

## Do's and Don'ts

**Don't:**
- Don't use cold grays — screenshot shows warm off-white (#FFFCF7) as primary background.
- Don't use sharp corners everywhere — screenshot shows generous pill shapes and rounded corners.
- Don't use stark white backgrounds — screenshot shows warm, slightly yellowed whites.
- Don't use thin, lightweight typography — screenshot shows bold, expressive serif headlines.
- Don't use aggressive shadows — screenshot shows soft, subtle shadows for depth.
- Don't use rigid, corporate layout — screenshot shows playful, expressive compositions with noise textures.

---

## System Prompt (paste into AI agent)

```
This is a warm, friendly browser product website that uses playful serif typography and expressive color to feel approachable. Key colors include warm off-white (#FFFCF7), vibrant blue (#3139FB), and black text. Font categories are transitional-serif for display and humanist-sans for body. Critical donts: don't use cold gray backgrounds, don't use sharp corners everywhere, don't use stark white (#FFFFFF), don't use thin typography, don't use aggressive shadows, don't use corporate layouts. The design balances modern productivity with playful personality through noise textures and warm tones.
```