---
version: alpha
name: "Patchbay"
description: "API monitoring for small engineering teams"
colors:
  background: "#faf9f6"
  surface: "#ffffff"
  border: "#dbd8ce"
  text: "#201d15"
  muted: "#676357"
  primary: "#736000"
  on-primary: "#ffffff"
  accent: "#506fdb"
  on-accent: "#000000"
  dark-background: "#11100b"
  dark-surface: "#211f17"
  dark-border: "#37352d"
  dark-text: "#f0f0ed"
  dark-muted: "#b4b1a7"
  dark-primary: "#c2a41c"
  dark-on-primary: "#111111"
  dark-accent: "#9fb9ff"
  dark-on-accent: "#000000"
typography:
  h1:
    fontFamily: "Space Grotesk"
    fontSize: "3.052rem"
    fontWeight: 700
    lineHeight: 1.15
    letterSpacing: "-0.02em"
  h2:
    fontFamily: "Space Grotesk"
    fontSize: "2.441rem"
    fontWeight: 700
    lineHeight: 1.2
    letterSpacing: "-0.01em"
  h3:
    fontFamily: "Space Grotesk"
    fontSize: "1.953rem"
    fontWeight: 600
    lineHeight: 1.25
  h4:
    fontFamily: "Space Grotesk"
    fontSize: "1.563rem"
    fontWeight: 600
    lineHeight: 1.25
  body-lg:
    fontFamily: "Space Grotesk"
    fontSize: "1.25rem"
    fontWeight: 400
    lineHeight: 1.6
  body-md:
    fontFamily: "Space Grotesk"
    fontSize: "1rem"
    fontWeight: 400
    lineHeight: 1.6
  body-sm:
    fontFamily: "Space Grotesk"
    fontSize: "0.8rem"
    fontWeight: 400
    lineHeight: 1.5
  label:
    fontFamily: "Space Grotesk"
    fontSize: "1rem"
    fontWeight: 600
    lineHeight: 1.25
  caption:
    fontFamily: "Space Grotesk"
    fontSize: "0.64rem"
    fontWeight: 600
    lineHeight: 1.4
  code:
    fontFamily: "JetBrains Mono"
    fontSize: "0.8rem"
    fontWeight: 400
    lineHeight: 1.5
rounded:
  sm: "0px"
  md: "0px"
  lg: "0px"
  full: "9999px"
spacing:
  unit: "4px"
  xs: "4px"
  sm: "8px"
  md: "16px"
  lg: "24px"
  xl: "32px"
  2xl: "48px"
  3xl: "64px"
  gutter: "16px"
  control-height: "40px"
  control-padding: "16px"
  gap: "12px"
  section: "72px"
components:
  page:
    backgroundColor: "{colors.background}"
    textColor: "{colors.text}"
    typography: "{typography.body-md}"
  text-muted:
    backgroundColor: "{colors.background}"
    textColor: "{colors.muted}"
    typography: "{typography.body-sm}"
  card:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.lg}"
    padding: "16px"
  card-muted:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.muted}"
    typography: "{typography.body-sm}"
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label}"
    rounded: "{rounded.md}"
    height: "40px"
    padding: "16px"
  button-secondary:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    typography: "{typography.label}"
    rounded: "{rounded.md}"
    height: "40px"
    padding: "16px"
  input:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    typography: "{typography.body-md}"
    rounded: "{rounded.md}"
    height: "40px"
    padding: "16px"
  divider:
    backgroundColor: "{colors.border}"
    height: "1px"
  badge:
    backgroundColor: "{colors.accent}"
    textColor: "{colors.on-accent}"
    typography: "{typography.caption}"
    rounded: "{rounded.sm}"
    padding: "2px 8px"
  page-dark:
    backgroundColor: "{colors.dark-background}"
    textColor: "{colors.dark-text}"
    typography: "{typography.body-md}"
  text-muted-dark:
    backgroundColor: "{colors.dark-background}"
    textColor: "{colors.dark-muted}"
    typography: "{typography.body-sm}"
  card-dark:
    backgroundColor: "{colors.dark-surface}"
    textColor: "{colors.dark-text}"
    rounded: "{rounded.lg}"
    padding: "16px"
  card-muted-dark:
    backgroundColor: "{colors.dark-surface}"
    textColor: "{colors.dark-muted}"
    typography: "{typography.body-sm}"
  button-primary-dark:
    backgroundColor: "{colors.dark-primary}"
    textColor: "{colors.dark-on-primary}"
    typography: "{typography.label}"
    rounded: "{rounded.md}"
    height: "40px"
    padding: "16px"
  button-secondary-dark:
    backgroundColor: "{colors.dark-surface}"
    textColor: "{colors.dark-text}"
    typography: "{typography.label}"
    rounded: "{rounded.md}"
    height: "40px"
    padding: "16px"
  input-dark:
    backgroundColor: "{colors.dark-surface}"
    textColor: "{colors.dark-text}"
    typography: "{typography.body-md}"
    rounded: "{rounded.md}"
    height: "40px"
    padding: "16px"
  divider-dark:
    backgroundColor: "{colors.dark-border}"
    height: "1px"
  badge-dark:
    backgroundColor: "{colors.dark-accent}"
    textColor: "{colors.dark-on-accent}"
    typography: "{typography.caption}"
    rounded: "{rounded.sm}"
    padding: "2px 8px"
---
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# DESIGN.md — Patchbay

> Design rules for Patchbay: API monitoring for small engineering teams. This file is the source of truth for colour, type, spacing, shape, motion and component behaviour. People and AI coding agents should follow it exactly and should not invent new values. The YAML front matter holds the tokens in the [DESIGN.md format](https://github.com/google-labs-code/design.md) (version alpha); the sections below explain how to use them.

## Overview

- **Product type:** Marketing website
- **Personality:** Confident, Technical, Bold
- **Themes:** light and dark (follows the system setting, overridable with `data-theme`; dark tokens are the `dark-*` colours and the `*-dark` components)
- **Accessibility target:** WCAG 2.2 AA

### Rules for AI coding agents

1. Use only the tokens in this file. If something seems to need a new colour, size or shadow, reuse the nearest token and leave a TODO comment instead of inventing one.
2. Reference colours through CSS variables (`var(--color-primary)`) or the matching Tailwind classes — never raw hex in component code.
3. Build every interactive state: default, hover, active, focus-visible, disabled and loading.
4. Keep text contrast at the ratios in the Colors section. Re-check any new colour pairing before using it.
5. Respect `prefers-reduced-motion` and the tokens in the Motion section.
6. When a rule here conflicts with a framework default, this file wins.

### Personality and voice

- **Confident:** State things plainly; avoid hedging words such as “maybe” or “just”.
- **Technical:** Precise nouns and real units; show values instead of adjectives.
- **Bold:** Large type and decisive contrast; one strong colour moment per view.

## Colors

| Token | Role | Light | Dark |
|---|---|---|---|
| `background` (`--color-background`) | Page background | `#FAF9F6` | `#11100B` |
| `surface` (`--color-surface`) | Cards, menus, navigation, inputs | `#FFFFFF` | `#211F17` |
| `border` (`--color-border`) | Dividers and input borders | `#DBD8CE` | `#37352D` |
| `text` (`--color-text`) | Body text and headings | `#201D15` | `#F0F0ED` |
| `muted` (`--color-muted`) | Secondary text, captions, placeholders | `#676357` | `#B4B1A7` |
| `primary` (`--color-primary`) | Primary buttons, key links, selected states | `#736000` | `#C2A41C` |
| `on-primary` (`--color-on-primary`) | Text and icons on primary | `#FFFFFF` | `#111111` |
| `accent` (`--color-accent`) | Highlights, tags, focus ring, charts | `#506FDB` | `#9FB9FF` |
| `on-accent` (`--color-on-accent`) | Text on accent-filled tags | `#000000` | `#000000` |

### Measured contrast

| Pair (light) | Colours | Ratio | Needs | Result |
|---|---|---|---|---|
| Text on background | #201D15 on #FAF9F6 | 15.98:1 | 4.5:1 | Pass |
| Text on surface | #201D15 on #FFFFFF | 16.83:1 | 4.5:1 | Pass |
| Muted text on background | #676357 on #FAF9F6 | 5.70:1 | 4.5:1 | Pass |
| Muted text on surface | #676357 on #FFFFFF | 6.00:1 | 4.5:1 | Pass |
| Primary on background | #736000 on #FAF9F6 | 5.86:1 | 3:1 | Pass |
| Label on primary button | #FFFFFF on #736000 | 6.17:1 | 4.5:1 | Pass |
| Accent on surface | #506FDB on #FFFFFF | 4.53:1 | 3:1 | Pass |

| Pair (dark) | Colours | Ratio | Needs | Result |
|---|---|---|---|---|
| Text on background | #F0F0ED on #11100B | 16.68:1 | 4.5:1 | Pass |
| Text on surface | #F0F0ED on #211F17 | 14.45:1 | 4.5:1 | Pass |
| Muted text on background | #B4B1A7 on #11100B | 8.88:1 | 4.5:1 | Pass |
| Muted text on surface | #B4B1A7 on #211F17 | 7.69:1 | 4.5:1 | Pass |
| Primary on background | #C2A41C on #11100B | 7.82:1 | 3:1 | Pass |
| Label on primary button | #111111 on #C2A41C | 7.75:1 | 4.5:1 | Pass |
| Accent on surface | #9FB9FF on #211F17 | 8.53:1 | 3:1 | Pass |

### Colour rules

- One primary action per view uses `--color-primary` with `--color-on-primary` text.
- `--color-accent` is for small highlights (tags, focus rings, charts). Never use it for body text.
- Errors, warnings and success states use text plus an icon, not colour alone.

## Typography

- **Headings:** Space Grotesk (600–700)
- **Body:** Space Grotesk (400; 600 for emphasis)
- **Code and data:** JetBrains Mono
- **Base size:** 16px, scale ratio 1.25, body line-height 1.6, headings 1.15–1.25
- Maximum line length: about 70 characters (`max-width: 68ch`).

| Token | Size | rem | Typical use |
|---|---|---|---|
| `--text-xs` | 10.2px | 0.64rem | Fine print, badges (`caption`) |
| `--text-sm` | 12.8px | 0.8rem | Captions, table cells, helper text (`body-sm`, `code`) |
| `--text-base` | 16px | 1rem | Body text, inputs, buttons (`body-md`, `label`) |
| `--text-lg` | 20px | 1.25rem | Lead paragraph, card titles (`body-lg`) |
| `--text-xl` | 25px | 1.563rem | H4 / section titles (`h4`) |
| `--text-2xl` | 31.3px | 1.953rem | H3 (`h3`) |
| `--text-3xl` | 39.1px | 2.441rem | H2 (`h2`) |
| `--text-4xl` | 48.8px | 3.052rem | H1 / hero (`h1`) |

## Layout

Base unit **4px**. Use only these steps: `2`, `4`, `6`, `8`, `12`, `16`, `24`, `32`, `48`, `64` (px).

- **Density:** comfortable — controls 40px tall, 16px inner padding, 12px gaps between related items.
- **Section spacing:** 72px between page sections on desktop, about half on mobile.
- **Layout:** 12-column grid, max content width 1200px, 16px side gutter on phones; no horizontal scrolling at 320px.

## Elevation & Depth

Flat: hierarchy comes from `--color-surface` on `--color-background` and `--color-border` outlines, not shadows.

| Token | Value | Use |
|---|---|---|
| `--border-width` | 1px | Inputs, dividers, outline buttons |
| `--shadow-sm` | `none` | Inputs, small cards |
| `--shadow-md` | `none` | Dropdowns, popovers |
| `--shadow-lg` | `none` | Dialogs |

## Shapes

| Token | Value | Use |
|---|---|---|
| `--radius-sm` | 0px | Badges, checkboxes, small chips |
| `--radius-md` | 0px | Buttons, inputs |
| `--radius-lg` | 0px | Cards, dialogs, images |
| `--radius-full` | 9999px | Avatars, pills |

Square corners everywhere.

## Components

The `components` tokens in the front matter give the base atoms (page, text-muted, card, button-primary, button-secondary, input, divider, badge, each with a `-dark` variant). Behaviour:

### Buttons
- Height 40px, horizontal padding 16px, radius `--radius-md`, label in `--text-base` 600.
- **Primary:** `--color-primary` background, `--color-on-primary` label. **Secondary:** transparent with a `--border-width` `--color-border` outline and `--color-text` label. **Ghost:** text only.
- Hover: darken or lighten the fill by about 8% lightness; active: a further 4%. Disabled: 50% opacity, no pointer events. Loading: keep the width, show a spinner, block repeat clicks.

### Inputs and forms
- Height 40px, `--color-surface` fill, `--border-width` `--color-border` border, radius `--radius-md`.
- Every input has a visible label above it; helper text below in `--text-sm` `--color-muted`.
- Error: message under the field with an icon, border switches to an error colour that passes 3:1, and focus moves to the first invalid field on submit.

### Cards
- `--color-surface`, radius `--radius-lg`, 16px padding, a `--color-border` outline instead of a shadow.
- A whole-card link has one clear target and a visible focus ring.

### Navigation
- Top bar on `--color-surface` with a `--color-border` bottom edge; current page marked with weight and an underline or indicator, not colour alone.
- Below 768px, collapse to a menu button with an accessible name; the open menu traps focus and closes on Escape.

### Tables and lists
- Header row in `--text-sm` 600 `--color-muted`; rows separated by `--color-border` lines; numbers right-aligned in JetBrains Mono.
- On phones, tables scroll inside their own container or collapse to stacked cards.

### Tags and badges
- `--text-xs` 600, radius `--radius-sm`, padding 2px 8px. Accent-filled tags use `--color-on-accent` (black) text.

## Motion

Motion confirms an action or shows where something came from. Fade and short slides (4–8 px); no bounces.

| Token | Value |
|---|---|
| `--duration-fast` | 120ms (hover, press) |
| `--duration-base` | 200ms (menus, toasts) |
| `--duration-slow` | 320ms (dialogs, page sections) |
| `--ease` | `cubic-bezier(0.2, 0.8, 0.2, 1)` |

With `prefers-reduced-motion: reduce`, replace movement with an instant change or a fade of 100ms or less.

## Accessibility

- Text contrast at least 4.5:1 (3:1 for 24px+ or 18.7px+ bold); UI parts and focus rings at least 3:1.
- Visible focus on everything interactive: 2px `--color-accent` outline with a 2px offset.
- Touch targets at least 24×24px (44×44px preferred) with 8px between targets.
- Every image has alt text (empty `alt=""` if decorative); icons-only buttons have an accessible name.
- Pages work with keyboard only and at 200% zoom; headings are in order (one H1 per page).

## Tokens as CSS

Check this file with `npx @google/design.md lint DESIGN.md`; export the front-matter tokens with `npx @google/design.md export --format css-tailwind DESIGN.md` (Tailwind v4 `@theme`) or `--format dtcg` (W3C design tokens). The same tokens as plain CSS:

```css
:root {
  --color-background: #faf9f6;
  --color-surface: #ffffff;
  --color-border: #dbd8ce;
  --color-text: #201d15;
  --color-muted: #676357;
  --color-primary: #736000;
  --color-on-primary: #ffffff;
  --color-accent: #506fdb;
  --color-on-accent: #000000;
  --font-heading: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --text-xs: 0.64rem;
  --text-sm: 0.8rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.563rem;
  --text-2xl: 1.953rem;
  --text-3xl: 2.441rem;
  --text-4xl: 3.052rem;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-full: 9999px;
  --border-width: 1px;
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
  --duration-fast: 120ms;
  --duration-base: 200ms;
  --duration-slow: 320ms;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-background: #11100b;
    --color-surface: #211f17;
    --color-border: #37352d;
    --color-text: #f0f0ed;
    --color-muted: #b4b1a7;
    --color-primary: #c2a41c;
    --color-on-primary: #111111;
    --color-accent: #9fb9ff;
    --color-on-accent: #000000;
  }
}
:root[data-theme="dark"] {
  --color-background: #11100b;
  --color-surface: #211f17;
  --color-border: #37352d;
  --color-text: #f0f0ed;
  --color-muted: #b4b1a7;
  --color-primary: #c2a41c;
  --color-on-primary: #111111;
  --color-accent: #9fb9ff;
  --color-on-accent: #000000;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
```

<!-- Generated with the free DESIGN.md generator at madegooddesigns.com/tools/design-md-generator/ -->