# DESIGN.md · Google Fonts (FT-001)

> Written for AI coding agents. Values marked **OFFICIAL** come from the documented source named below; values marked **ESTIMATED** were measured by us from our own screenshots and are approximate. Never treat ESTIMATED values as official brand tokens.

## Overview
- Type: Font Library · Category: F. Fonts and Typography
- Platforms: Web, Android, Desktop
- Color theme: Monochrome light · Layout pattern: Sidebar app shell · Mood: Neutral, tool-like
- License / terms: Mostly SIL OFL; some Apache-2.0 / Ubuntu Font License

Free open-source font library + CSS API; variable fonts; Noto coverage.

### Analysis (ours)
Captured fonts.google.com: an app shell with a left filter sidebar and a long list of large type specimens. Almost no color; the type specimens are the visual content, with a sample-text field at the top.

## Color tokens
No official color tokens documented for this entry.

ESTIMATED · dominant colors measured from our screenshot(s) of the source site (median-cut quantization; share = % of pixels). Approximate, not official:

- `#FFFFFF` ~50%
- `#97A5B8` ~7%

## Typography
No official type scale documented for this entry; use the product’s own typography guidance.

## Spacing, radii, shadows
Not documented for this entry. Do not invent values; derive from your own design system.

## Components
No component inventory documented for this entry.

## Layout rules
- Observed layout pattern: **Sidebar app shell** (from our captures).

## Do’s and don’ts
- Do: Keep chrome neutral and let content (images, icons, type) carry color.
- Don’t: Don’t introduce decorative color that competes with content.
- Do: follow the source’s license/terms listed above.
- Don’t: present ESTIMATED colors as official tokens.

## Sources
- https://fonts.google.com
- Library entry: https://design-library-byt.pages.dev/entry/FT-001