popular

Mono

Monospace ink on a charcoal screen.

Best for: Developer tools, CLI products, technical blogs

Not for: Consumer retail, lifestyle brands

---
version: alpha
name: Mono
description: Monospace ink on a charcoal screen.
colors:
  primary: "#16A34A"
  secondary: "#52525B"
  tertiary: "#A1A1AA"
  background: "#FAFAF9"
  surface: "#FFFFFF"
  onPrimary: "#F4F4F5"
  onSecondary: "#F4F4F5"
  onTertiary: "#F4F4F5"
  onBackground: "#18181B"
  onSurface: "#18181B"
  outline: "#D4D4D8"
  muted: "#71717A"
  success: "#16A34A"
  warning: "#CA8A04"
  error: "#DC2626"
typography:
  h1:
    fontFamily: IBM Plex Mono
    fontSize: 32px
    fontWeight: 600
    lineHeight: 1.12
    letterSpacing: -0.03em
  h2:
    fontFamily: IBM Plex Mono
    fontSize: 24px
    fontWeight: 600
    lineHeight: 1.2
    letterSpacing: -0.02em
  h3:
    fontFamily: IBM Plex Mono
    fontSize: 20px
    fontWeight: 600
    lineHeight: 1.3
    letterSpacing: -0.01em
  body:
    fontFamily: IBM Plex Mono
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.55
    letterSpacing: 0em
  label:
    fontFamily: IBM Plex Mono
    fontSize: 13px
    fontWeight: 500
    lineHeight: 1.3
    letterSpacing: 0.02em
  caption:
    fontFamily: IBM Plex Mono
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.4
    letterSpacing: 0em
  mono:
    fontFamily: IBM Plex Mono
    fontSize: 13px
    fontWeight: 500
    lineHeight: 1.45
    letterSpacing: 0em
rounded:
  sm: 0px
  md: 2px
  lg: 4px
  xl: 4px
  full: 999px
spacing:
  xs: 4px
  sm: 8px
  md: 16px
  lg: 24px
  xl: 32px
  2xl: 48px
  3xl: 64px
components:
  navbar:
    backgroundColor: "{colors.background}"
    textColor: "{colors.onBackground}"
  hero:
    backgroundColor: "{colors.background}"
    textColor: "{colors.onBackground}"
  table:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.onSurface}"
  stat:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.onSurface}"
    rounded: "{rounded.lg}"
  chart:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.primary}"
  list-item:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.onSurface}"
    height: 44px
  footer:
    backgroundColor: "{colors.background}"
    textColor: "{colors.muted}"
---

# Mono

## Overview

Monospace ink on a charcoal screen. The atmosphere is daily-app balanced, predictable and symmetric, with static and restrained. Tone: terminal, precise, dry. Density 7/10, variance 2/10, motion 2/10. Material: Monospace, square corners, optional scanlines. Semantic green/red only.

How to use: Place this file at the repository root. Tell Cursor / Claude Code / Codex: read DESIGN.md and obey its tokens and Do/Don'ts.

## Colors

Semantic roles for the light theme. Keep a single accent; do not introduce a second brand hue.

- **primary** (`#16A34A`)
- **secondary** (`#52525B`)
- **tertiary** (`#A1A1AA`)
- **background** (`#FAFAF9`)
- **surface** (`#FFFFFF`)
- **outline** (`#D4D4D8`)
- **muted** (`#71717A`)
- **success** (`#16A34A`)
- **warning** (`#CA8A04`)
- **error** (`#DC2626`)
- **onPrimary** (`#F4F4F5`)
- **onSecondary** (`#F4F4F5`)
- **onTertiary** (`#F4F4F5`)
- **onBackground** (`#18181B`)
- **onSurface** (`#18181B`)

## Typography

Hierarchy comes from weight and size, not from shouting. Body line length stays near 65 characters.

- **h1**: "IBM Plex Mono" 600 / 32px / 1.12 / -0.03em
- **h2**: "IBM Plex Mono" 600 / 24px / 1.2 / -0.02em
- **h3**: "IBM Plex Mono" 600 / 20px / 1.3 / -0.01em
- **body**: "IBM Plex Mono" 400 / 16px / 1.55 / 0em
- **label**: "IBM Plex Mono" 500 / 13px / 1.3 / 0.02em
- **caption**: "IBM Plex Mono" 400 / 12px / 1.4 / 0em
- **mono**: "IBM Plex Mono" 500 / 13px / 1.45 / 0em

## Layout

Spacing scale: xs=4px, sm=8px, md=16px, lg=24px, xl=32px, 2xl=48px, 3xl=64px.

iOS: 44pt targets, respect Safe Area and Dynamic Type, SF Symbols, Large Titles and grouped lists.

Web: mobile-first, single column below 768px, body ≥ 16px, clamp() headlines, max-width 1120–1400px, min-h-[100dvh] for full-height sections.

Every element occupies its own spatial zone. No overlapping hero text. Collapse multi-column layouts below 768px.

## Elevation & Depth

- sm: `0 1px 2px rgba(24,24,27,0.06)`
- md: `0 8px 24px rgba(24,24,27,0.08)`
- lg: `0 18px 48px rgba(24,24,27,0.12)`
- surface: `terminal`
- recipe: Monospace, square corners, optional scanlines. Semantic green/red only.

Tint shadows toward the background hue. High-density layouts may replace cards with hairline dividers.


## Shapes

Radius scale: sm=0px, md=2px, lg=4px, xl=4px, full=999px.

## Components

- **Navbar** (`web.navbar` / default / md): Desktop nav with logo, icon links, and one primary CTA.
- **Hero** (`web.hero` / left / lg): Hero uses left layout, one CTA, no "Scroll to explore".
- **Data Table** (`web.table` / default / md): Mono numbers, quiet headers, tappable rows.
- **Stat** (`stat` / default / md): Numbers in mono, labels in quiet uppercase.
- **Chart** (`chart` / bar / md): Mini area/bar chart using primary and secondary.
- **List Item** (`list-item` / chevron / md): Min 44pt rows, title + subtitle, optional chevron.
- **List Item** (`list-item` / chevron / md): Min 44pt rows, title + subtitle, optional chevron.
- **Footer** (`web.footer` / default / md): Quiet footer with clear link groups.

## Do's and Don'ts

### Do
- Use semantic color tokens, never raw hex in components.
- Keep a single accent; hierarchy comes from type weight and space.
- Define default, hover, focus-visible, pressed, disabled, and loading states.
- Meet WCAG 2.2 AA contrast for body text and interactive labels.
- Touch targets are at least 44×44pt on iOS and 44px on web.

### Don't
- Do not use Inter as the display face for premium work.
- Do not use pure black #000000 for large surfaces.
- Do not add neon outer glows or custom mouse cursors.
- Do not ship three equal feature cards as the default layout.
- Do not hide focus rings or drop below AA contrast.