---

name: radix-typography description: Set up pixel-perfect typography for Radix UI using vite-plugin-capsize-radix. Helps configure fonts, choose pairings, and integrate with your project.

Radix Typography with Capsize

This skill helps you set up bulletproof typography for Radix UI applications using vite-plugin-capsize-radix. It generates CSS that trims the invisible whitespace above and below text (caused by font metrics), enabling pixel-perfect alignment.

What This Plugin Does

Traditional CSS font rendering includes invisible space above and below text based on the font's ascender/descender metrics. This makes precise layouts difficult. Capsize calculates these metrics and applies CSS pseudo-elements to trim the excess, so your text sits exactly where you specify.

This plugin:

• Generates CSS that overrides Radix UI's typography variables
• Creates font stacks with metric-aware fallbacks
• Supports separate fonts for body text, headings, and code
• Handles responsive sizing (mobile vs desktop)

Important: Spacing with Capsize

Because Capsize trims the invisible whitespace above and below text, adjacent text elements will sit directly against each other without any natural spacing. This is by design - it gives you precise control over layout.

You must explicitly add spacing between text elements using:

• Flex with gap (recommended): <Flex direction="column" gap="2">
• margin/padding: Apply to individual elements
• Radix spacing props: mt, mb, my, etc.

// Without gap - heading and text will touch
<Flex direction="column">
  <Heading>Recipes</Heading>
  <Text>Define your chocolate recipes...</Text>
</Flex>

// With gap - natural spacing between elements
<Flex direction="column" gap="2">
  <Heading>Recipes</Heading>
  <Text>Define your chocolate recipes...</Text>
</Flex>

This explicit spacing model is more predictable than relying on font metrics and gives you pixel-perfect control over your layouts.

Preserving Descenders

Capsize trims text to the cap-height (top) and alphabetic baseline (bottom). This can clip descenders (the tails of letters like "g", "y", "p") on large headings with tight line-heights.

Add the preserve-descenders class to keep descenders visible:

<Heading size="9" className="preserve-descenders">
  Signal Sky
</Heading>

This disables the bottom trim while keeping the top tight. Use this on large display headings where you notice descender clipping.

Installation

pnpm add vite-plugin-capsize-radix @capsizecss/metrics

Quick Start

1. Configure the Plugin

In vite.config.ts:

import { defineConfig } from "vite"
import react from "@vitejs/plugin-react"
import { capsizeRadixPlugin } from "vite-plugin-capsize-radix"

// Import metrics for your chosen fonts
import inter from "@capsizecss/metrics/inter"
import arial from "@capsizecss/metrics/arial"

export default defineConfig({
  plugins: [
    react(),
    capsizeRadixPlugin({
      outputPath: `./public/typography.css`,
      defaultFontStack: [inter, arial],
    }),
  ],
})

2. Install Fonts via Fontsource

For open source fonts, use @fontsource:

pnpm add @fontsource/inter

3. Import CSS in Correct Order

In your entry file (e.g., main.tsx), the import order matters:

// 1. Radix base styles FIRST
import "@radix-ui/themes/styles.css"

// 2. Your font CSS from Fontsource
import "@fontsource/inter/latin.css"

// 3. Generated typography CSS LAST (overrides Radix variables)
import "/typography.css"

// 4. Your app styles
import "./App.css"

Critical: The generated typography CSS must come AFTER @radix-ui/themes/styles.css to properly override the CSS variables.

Using Fontsource Fonts

Fontsource provides npm packages for Google Fonts and other open source fonts. Each package includes the font files and CSS.

Installation Pattern

# Install the font package
pnpm add @fontsource/[font-name]

# Install the metrics (usually same name, check @capsizecss/metrics)
# Metrics are included in @capsizecss/metrics

Import Patterns

// Full font (all weights, styles, subsets)
import "@fontsource/inter"

// Specific subset (recommended for performance)
import "@fontsource/inter/latin.css"

// Specific weight
import "@fontsource/inter/400.css"
import "@fontsource/inter/700.css"

// Variable font (if available)
import "@fontsource-variable/inter"

Common Fontsource Packages

Font	Package	Metrics Import
Albert Sans	@fontsource/albert-sans	@capsizecss/metrics/albertSans
Alegreya	@fontsource/alegreya	@capsizecss/metrics/alegreya
Alegreya Sans	@fontsource/alegreya-sans	@capsizecss/metrics/alegreyaSans
Archivo	@fontsource/archivo	@capsizecss/metrics/archivo
Arvo	@fontsource/arvo	@capsizecss/metrics/arvo
Atkinson Hyperlegible	@fontsource/atkinson-hyperlegible	@capsizecss/metrics/atkinsonHyperlegible
Be Vietnam Pro	@fontsource/be-vietnam-pro	@capsizecss/metrics/beVietnamPro
Bodoni Moda	@fontsource/bodoni-moda	@capsizecss/metrics/bodoniModa
Bricolage Grotesque	@fontsource/bricolage-grotesque	@capsizecss/metrics/bricolageGrotesque
Cabin	@fontsource/cabin	@capsizecss/metrics/cabin
Cabin Condensed	@fontsource/cabin-condensed	@capsizecss/metrics/cabinCondensed
Commissioner	@fontsource/commissioner	@capsizecss/metrics/commissioner
Crimson Text	@fontsource/crimson-text	@capsizecss/metrics/crimsonText
DM Sans	@fontsource/dm-sans	@capsizecss/metrics/dmSans
DM Serif Display	@fontsource/dm-serif-display	@capsizecss/metrics/dmSerifDisplay
DM Serif Text	@fontsource/dm-serif-text	@capsizecss/metrics/dmSerifText
Domine	@fontsource/domine	@capsizecss/metrics/domine
Epilogue	@fontsource/epilogue	@capsizecss/metrics/epilogue
Exo	@fontsource/exo	@capsizecss/metrics/exo
Figtree	@fontsource/figtree	@capsizecss/metrics/figtree
Fira Sans	@fontsource/fira-sans	@capsizecss/metrics/firaSans
Fraunces	@fontsource/fraunces	@capsizecss/metrics/fraunces
Geist	@fontsource/geist-sans	@capsizecss/metrics/geist
Instrument Sans	@fontsource/instrument-sans	@capsizecss/metrics/instrumentSans
Instrument Serif	@fontsource/instrument-serif	@capsizecss/metrics/instrumentSerif
Inter	@fontsource/inter	@capsizecss/metrics/inter
Josefin Sans	@fontsource/josefin-sans	@capsizecss/metrics/josefinSans
Lato	@fontsource/lato	@capsizecss/metrics/lato
Lexend	@fontsource/lexend	@capsizecss/metrics/lexend
Libre Baskerville	@fontsource/libre-baskerville	@capsizecss/metrics/libreBaskerville
Literata	@fontsource/literata	@capsizecss/metrics/literata
Lora	@fontsource/lora	@capsizecss/metrics/lora
Manrope	@fontsource/manrope	@capsizecss/metrics/manrope
Merriweather	@fontsource/merriweather	@capsizecss/metrics/merriweather
Merriweather Sans	@fontsource/merriweather-sans	@capsizecss/metrics/merriweatherSans
Montserrat	@fontsource/montserrat	@capsizecss/metrics/montserrat
Neuton	@fontsource/neuton	@capsizecss/metrics/neuton
Newsreader	@fontsource/newsreader	@capsizecss/metrics/newsreader
Open Sans	@fontsource/open-sans	@capsizecss/metrics/openSans
Oswald	@fontsource/oswald	@capsizecss/metrics/oswald
Outfit	@fontsource/outfit	@capsizecss/metrics/outfit
Patua One	@fontsource/patua-one	@capsizecss/metrics/patuaOne
Playfair Display	@fontsource/playfair-display	@capsizecss/metrics/playfairDisplay
Plus Jakarta Sans	@fontsource/plus-jakarta-sans	@capsizecss/metrics/plusJakartaSans
PT Sans	@fontsource/pt-sans	@capsizecss/metrics/pTSans
Quattrocento Sans	@fontsource/quattrocento-sans	@capsizecss/metrics/quattrocentoSans
Raleway	@fontsource/raleway	@capsizecss/metrics/raleway
Roboto	@fontsource/roboto	@capsizecss/metrics/roboto
Roboto Condensed	@fontsource/roboto-condensed	@capsizecss/metrics/robotoCondensed
Roboto Slab	@fontsource/roboto-slab	@capsizecss/metrics/robotoSlab
Rosario	@fontsource/rosario	@capsizecss/metrics/rosario
Sora	@fontsource/sora	@capsizecss/metrics/sora
Source Sans 3	@fontsource/source-sans-3	@capsizecss/metrics/sourceSans3
Source Serif 4	@fontsource/source-serif-4	@capsizecss/metrics/sourceSerif4
Space Grotesk	@fontsource/space-grotesk	@capsizecss/metrics/spaceGrotesk
Varela Round	@fontsource/varela-round	@capsizecss/metrics/varelaRound
Vollkorn	@fontsource/vollkorn	@capsizecss/metrics/vollkorn
Work Sans	@fontsource/work-sans	@capsizecss/metrics/workSans
Yrsa	@fontsource/yrsa	@capsizecss/metrics/yrsa

Plugin Configuration Options

capsizeRadixPlugin({
  // Required: where to write the generated CSS
  outputPath: `./public/typography.css`,

  // Body text font stack (first font = primary, rest = fallbacks)
  defaultFontStack: [inter, arial],

  // Heading font stack (defaults to defaultFontStack if not specified)
  headingFontStack: [playfairDisplay, arial],

  // Code/monospace font stack
  codingFontStack: [sourceCodePro],

  // Custom text sizes (fontSize = cap-height, lineHeight = total)
  textStyles: [
    { fontSize: 9, lineHeight: 19 },   // size 1
    { fontSize: 11, lineHeight: 23 },  // size 2
    { fontSize: 12, lineHeight: 25 },  // size 3 (mobile default)
    { fontSize: 14, lineHeight: 28 },  // size 4 (desktop default)
    { fontSize: 18, lineHeight: 30 },  // size 5
    { fontSize: 24, lineHeight: 36 },  // size 6
    { fontSize: 36, lineHeight: 44 },  // size 7
    { fontSize: 48, lineHeight: 52 },  // size 8
    { fontSize: 64, lineHeight: 64 },  // size 9
  ],
})

Font Pairing Recommendations

These pairings are drawn from typography.js themes, a collection of carefully designed typographic systems. Choose based on your app's personality.

Quick Reference Table

Theme	Body	Heading	Vibe
Alton	Open Sans	Domine	Professional, authoritative
De Young	Alegreya	Alegreya Sans	Literary, sophisticated
Doelger	Cabin	Arvo	Friendly, sturdy
Elk Glen	PT Sans	Oswald	Bold, industrial
Fairy Gates	Quattrocento Sans	Work Sans	Warm, inviting
Funston	Cabin Condensed	Patua One	Playful, distinctive
Grand View	Arvo	Montserrat	Modern slab, geometric
Irving	Yrsa	Exo	Editorial, futuristic
Judah	Vollkorn	Roboto Condensed	Classic, efficient
Kirkham	Fira Sans	Playfair Display	Elegant contrast
Lawton	Libre Baskerville	Raleway	Traditional meets modern
Legible	Fira Sans	Merriweather	Highly readable
Lincoln	Lora	Varela Round	Bookish, friendly
Moraga	Source Sans Pro	Source Sans Pro	Clean, unified
Noriega	Lato	Lato	Simple, warm
Ocean Beach	Roboto	Roboto Slab	Technical, solid
Parnassus	Merriweather	Merriweather Sans	Literary, premium
St. Annes	Source Sans 3	Source Serif 4	Adobe superfamily
Stardust	Merriweather	Josefin Sans	Dreamy, vintage
Stern Grove	Georgia	Montserrat	Classic body, modern heads
Stow Lake	Lato	Neuton	Contemporary, refined
Sutro	Merriweather	Open Sans	Readable, friendly
Twin Peaks	Crimson Text	Rosario	Book typography
US Web Design	Source Sans 3	Merriweather	Government standard

---

Clean & Modern (SaaS, Dashboards, Tools)

Inter - The gold standard for UI typography

import inter from "@capsizecss/metrics/inter"
import arial from "@capsizecss/metrics/arial"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [inter, arial],
})

Lato (Noriega theme) - Warm, humanist sans-serif

import lato from "@capsizecss/metrics/lato"

Roboto + Roboto Slab (Ocean Beach theme) - Material Design inspired

import roboto from "@capsizecss/metrics/roboto"
import robotoSlab from "@capsizecss/metrics/robotoSlab"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [roboto, arial],
  headingFontStack: [robotoSlab, georgia],
})

---

Editorial & Content-Heavy (Blogs, Documentation)

Source Serif 4 + Source Sans 3 (St. Annes theme) - Adobe's superfamily

import sourceSerif from "@capsizecss/metrics/sourceSerif4"
import sourceSans from "@capsizecss/metrics/sourceSans3"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  headingFontStack: [sourceSerif, georgia],
  defaultFontStack: [sourceSans, arial],
})

Merriweather + Merriweather Sans (Parnassus theme) - Screen-optimized serif

import merriweather from "@capsizecss/metrics/merriweather"
import merriweatherSans from "@capsizecss/metrics/merriweatherSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [merriweather, georgia],
  headingFontStack: [merriweatherSans, arial],
})

Merriweather + Open Sans (Sutro theme) - Readable body, friendly headings

import merriweather from "@capsizecss/metrics/merriweather"
import openSans from "@capsizecss/metrics/openSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [merriweather, georgia],
  headingFontStack: [openSans, arial],
})

Source Sans 3 + Merriweather (US Web Design Standards) - Government-grade clarity

import sourceSans from "@capsizecss/metrics/sourceSans3"
import merriweather from "@capsizecss/metrics/merriweather"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [sourceSans, arial],
  headingFontStack: [merriweather, georgia],
})

Fira Sans + Merriweather (Legible theme) - Maximum readability

import firaSans from "@capsizecss/metrics/firaSans"
import merriweather from "@capsizecss/metrics/merriweather"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [firaSans, arial],
  headingFontStack: [merriweather, georgia],
})

---

Bold & Distinctive (Marketing, Landing Pages)

Fira Sans + Playfair Display (Kirkham theme) - Elegant contrast

import firaSans from "@capsizecss/metrics/firaSans"
import playfairDisplay from "@capsizecss/metrics/playfairDisplay"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [firaSans, arial],
  headingFontStack: [playfairDisplay, georgia],
})

Arvo + Montserrat (Grand View theme) - Slab serif meets geometric

import arvo from "@capsizecss/metrics/arvo"
import montserrat from "@capsizecss/metrics/montserrat"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [arvo, georgia],
  headingFontStack: [montserrat, arial],
})

Libre Baskerville + Raleway (Lawton theme) - Classic meets modern

import libreBaskerville from "@capsizecss/metrics/libreBaskerville"
import raleway from "@capsizecss/metrics/raleway"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [libreBaskerville, georgia],
  headingFontStack: [raleway, arial],
})

Open Sans + Domine (Alton theme) - Professional authority

import openSans from "@capsizecss/metrics/openSans"
import domine from "@capsizecss/metrics/domine"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [openSans, arial],
  headingFontStack: [domine, georgia],
})

---

Literary & Sophisticated (Publishing, Portfolios)

Alegreya + Alegreya Sans (De Young theme) - Designed for literature

import alegreya from "@capsizecss/metrics/alegreya"
import alegreyaSans from "@capsizecss/metrics/alegreyaSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [alegreya, georgia],
  headingFontStack: [alegreyaSans, arial],
})

Crimson Text + Rosario (Twin Peaks theme) - Classic book typography

import crimsonText from "@capsizecss/metrics/crimsonText"
import rosario from "@capsizecss/metrics/rosario"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [crimsonText, georgia],
  headingFontStack: [rosario, arial],
})

Vollkorn + Roboto Condensed (Judah theme) - Old-style meets modern

import vollkorn from "@capsizecss/metrics/vollkorn"
import robotoCondensed from "@capsizecss/metrics/robotoCondensed"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [vollkorn, georgia],
  headingFontStack: [robotoCondensed, arial],
})

Lora + Varela Round (Lincoln theme) - Bookish warmth

import lora from "@capsizecss/metrics/lora"
import varelaRound from "@capsizecss/metrics/varelaRound"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [lora, georgia],
  headingFontStack: [varelaRound, arial],
})

Merriweather + Josefin Sans (Stardust theme) - Dreamy, vintage feel

import merriweather from "@capsizecss/metrics/merriweather"
import josefinSans from "@capsizecss/metrics/josefinSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [merriweather, georgia],
  headingFontStack: [josefinSans, arial],
})

Yrsa + Exo (Irving theme) - Editorial meets sci-fi

import yrsa from "@capsizecss/metrics/yrsa"
import exo from "@capsizecss/metrics/exo"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [yrsa, georgia],
  headingFontStack: [exo, arial],
})

---

Technical & Industrial

PT Sans + Oswald (Elk Glen theme) - Bold, industrial feel

import pTSans from "@capsizecss/metrics/pTSans"
import oswald from "@capsizecss/metrics/oswald"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [pTSans, arial],
  headingFontStack: [oswald, arial],
})

Lato + Neuton (Stow Lake theme) - Contemporary refinement

import lato from "@capsizecss/metrics/lato"
import neuton from "@capsizecss/metrics/neuton"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [lato, arial],
  headingFontStack: [neuton, georgia],
})

---

Approachable & Friendly (Consumer Apps)

Quattrocento Sans + Work Sans (Fairy Gates theme) - Warm and inviting

import quattrocentoSans from "@capsizecss/metrics/quattrocentoSans"
import workSans from "@capsizecss/metrics/workSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [quattrocentoSans, arial],
  headingFontStack: [workSans, arial],
})

Cabin + Arvo (Doelger theme) - Friendly humanist with sturdy slab

import cabin from "@capsizecss/metrics/cabin"
import arvo from "@capsizecss/metrics/arvo"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [cabin, arial],
  headingFontStack: [arvo, georgia],
})

Cabin Condensed + Patua One (Funston theme) - Playful, distinctive

import cabinCondensed from "@capsizecss/metrics/cabinCondensed"
import patuaOne from "@capsizecss/metrics/patuaOne"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [cabinCondensed, arial],
  headingFontStack: [patuaOne, georgia],
})

Josefin Sans - Geometric elegance with vintage charm

import josefinSans from "@capsizecss/metrics/josefinSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [josefinSans, arial],
})

---

Modern Fonts (2015-2025)

These fonts represent the best typography additions from the last decade, featuring variable font support and modern design sensibilities.

Modern Sans-Serifs

Plus Jakarta Sans - Geometric warmth, variable font

import plusJakartaSans from "@capsizecss/metrics/plusJakartaSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [plusJakartaSans, arial],
})

Outfit - Clean geometric, perfect for design systems

import outfit from "@capsizecss/metrics/outfit"

Manrope - Humanist geometric, friendly and modern

import manrope from "@capsizecss/metrics/manrope"

Sora - Futuristic, UI-optimized

import sora from "@capsizecss/metrics/sora"

Figtree - Clean yet friendly, great for UI

import figtree from "@capsizecss/metrics/figtree"

Space Grotesk - Tech-forward, futuristic

import spaceGrotesk from "@capsizecss/metrics/spaceGrotesk"

Geist - Vercel's font, optimized for code/web apps

import geist from "@capsizecss/metrics/geist"

---

Modern Serifs

Instrument Serif + Instrument Sans - Rising star, editorial elegance

import instrumentSerif from "@capsizecss/metrics/instrumentSerif"
import instrumentSans from "@capsizecss/metrics/instrumentSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  headingFontStack: [instrumentSerif, georgia],
  defaultFontStack: [instrumentSans, arial],
})

DM Serif Display + DM Sans - Google/DeepMind family, cohesive

import dmSerifDisplay from "@capsizecss/metrics/dmSerifDisplay"
import dmSans from "@capsizecss/metrics/dmSans"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  headingFontStack: [dmSerifDisplay, georgia],
  defaultFontStack: [dmSans, arial],
})

Newsreader + Figtree - Designed for long-form reading

import newsreader from "@capsizecss/metrics/newsreader"
import figtree from "@capsizecss/metrics/figtree"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [newsreader, georgia],
  headingFontStack: [figtree, arial],
})

Literata - Google Play Books default, exceptional for reading

import literata from "@capsizecss/metrics/literata"

Fraunces + Epilogue - Expressive soft-serif with unique "wonk" axis

import fraunces from "@capsizecss/metrics/fraunces"
import epilogue from "@capsizecss/metrics/epilogue"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  headingFontStack: [fraunces, georgia],
  defaultFontStack: [epilogue, arial],
})

Bodoni Moda + Outfit - High-fashion luxury

import bodoniModa from "@capsizecss/metrics/bodoniModa"
import outfit from "@capsizecss/metrics/outfit"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  headingFontStack: [bodoniModa, georgia],
  defaultFontStack: [outfit, arial],
})

---

Tech & Developer

Space Grotesk + Space Mono - Cohesive tech aesthetic

import spaceGrotesk from "@capsizecss/metrics/spaceGrotesk"
import spaceMono from "@capsizecss/metrics/spaceMono"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [spaceGrotesk, arial],
  codingFontStack: [spaceMono],
})

Geist + Geist Mono - Vercel's Next.js default

import geist from "@capsizecss/metrics/geist"
import geistMono from "@capsizecss/metrics/geistMono"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [geist, arial],
  codingFontStack: [geistMono],
})

Be Vietnam Pro - Neo-grotesque for tech companies

import beVietnamPro from "@capsizecss/metrics/beVietnamPro"

Bricolage Grotesque - Editorial tech, variable width

import bricolageGrotesque from "@capsizecss/metrics/bricolageGrotesque"

---

Accessibility-Focused

Atkinson Hyperlegible - Braille Institute, maximizes character recognition

import atkinsonHyperlegible from "@capsizecss/metrics/atkinsonHyperlegible"
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [atkinsonHyperlegible, arial],
})

Lexend - Reduces visual stress, improves reading performance

import lexend from "@capsizecss/metrics/lexend"

---

Versatile Modern Choices

Commissioner - Humanist with unique "flair" axis

import commissioner from "@capsizecss/metrics/commissioner"

Epilogue - Clean variable sans, works at all sizes

import epilogue from "@capsizecss/metrics/epilogue"

Albert Sans - Contemporary humanist warmth

import albertSans from "@capsizecss/metrics/albertSans"

Archivo - Neo-grotesque superfamily (normal, condensed, black)

import archivo from "@capsizecss/metrics/archivo"

---

Modern Quick Reference

Font	Type	Year	Best For	Variable
Plus Jakarta Sans	Sans	2020	Body/UI	Yes
Outfit	Sans	2021	Branding	Yes
Manrope	Sans	2019	UI/Body	Yes
Sora	Sans	2020	Apps/UI	Yes
Figtree	Sans	2022	UI/Body	Yes
Space Grotesk	Sans	2018	Tech/Display	No
Geist	Sans	2024	Web Apps	Yes
DM Sans	Sans	2019	Small Text	Yes
Instrument Sans	Sans	2023	Branding	Yes
Be Vietnam Pro	Sans	2021	Tech	Yes
Bricolage Grotesque	Sans	2023	Editorial	Yes
Instrument Serif	Serif	2023	Display	No
Newsreader	Serif	2020	Long-form	Yes
Literata	Serif	2015	Reading	Yes
DM Serif Display	Serif	2019	Headlines	No
Bodoni Moda	Serif	2020	Luxury	Yes
Fraunces	Serif	2020	Expressive	Yes
Atkinson Hyperlegible	Sans	2021	Accessibility	Yes
Lexend	Sans	2019	Readability	Yes
Commissioner	Sans	2020	Multilingual	Yes
Epilogue	Sans	2018	Versatile	Yes
Albert Sans	Sans	2022	Body/Heads	Yes
Archivo	Sans	2017	Headlines	Yes

---

System Fonts (Zero Network Requests)

For maximum performance, use system fonts. The plugin defaults to a carefully ordered system font stack:

// No font imports needed - plugin uses built-in system font metrics
capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  // omit defaultFontStack to use system fonts:
  // Apple System, Segoe UI, Roboto, Ubuntu, Noto Sans
})

Adding Custom Fonts

For fonts not in Fontsource or proprietary fonts:

1. Get Font Metrics

Use @capsizecss/unpack to extract metrics from a font file:

pnpm add -D @capsizecss/unpack

// scripts/extract-metrics.ts
import { fromFile } from "@capsizecss/unpack"

const metrics = await fromFile("./fonts/MyCustomFont.woff2")
console.log(JSON.stringify(metrics, null, 2))

2. Create a Metrics File

Save the output as a TypeScript file:

// src/fonts/my-custom-font-metrics.ts
import type { FontMetrics } from "@capsizecss/core"

const myCustomFont: FontMetrics = {
  familyName: "My Custom Font",
  category: "sans-serif",
  capHeight: 700,
  ascent: 935,
  descent: -265,
  lineGap: 0,
  unitsPerEm: 1000,
  xHeight: 520,
  xWidthAvg: 500,
}

export default myCustomFont

3. Add Font-Face CSS

/* src/fonts/my-custom-font.css */
@font-face {
  font-family: "My Custom Font";
  src: url("/fonts/MyCustomFont.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

4. Configure the Plugin

import myCustomFont from "./src/fonts/my-custom-font-metrics"
import arial from "@capsizecss/metrics/arial"

capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [myCustomFont, arial],
})

5. Import the Font CSS

// main.tsx
import "@radix-ui/themes/styles.css"
import "./src/fonts/my-custom-font.css"  // Your @font-face rules
import "/typography.css"                  // Generated capsize CSS

Validating Your Setup

After configuration, verify:

1. Build succeeds: pnpm build generates the CSS file
2. CSS file exists: Check outputPath location
3. Variables are overridden: Inspect .radix-themes in browser DevTools
4. Text is trimmed: Text should align precisely to grid lines

Common Issues

CSS not applying: Check import order - typography CSS must come after Radix styles

Font not loading: Verify Fontsource import path and that font files are bundled

Metrics mismatch: Ensure the metrics package matches your font version

Missing fallback: Always include a fallback font (arial, georgia) for consistent rendering

Code Font Configuration

For code blocks and inline code, choose a monospace font:

Font	Package	Metrics Import	Notes
Source Code Pro	@fontsource/source-code-pro	@capsizecss/metrics/sourceCodePro	Adobe, clean
Fira Code	@fontsource/fira-code	@capsizecss/metrics/firaCode	Ligatures
JetBrains Mono	@fontsource/jetbrains-mono	@capsizecss/metrics/jetBrainsMono	IDE-optimized
Geist Mono	@fontsource/geist-mono	@capsizecss/metrics/geistMono	Vercel/Next.js
Space Mono	@fontsource/space-mono	@capsizecss/metrics/spaceMono	Retro-tech
DM Mono	@fontsource/dm-mono	@capsizecss/metrics/dmMono	DeepMind family
IBM Plex Mono	@fontsource/ibm-plex-mono	@capsizecss/metrics/ibmPlexMono	Corporate
Inconsolata	@fontsource/inconsolata	@capsizecss/metrics/inconsolata	Compact
Roboto Mono	@fontsource/roboto-mono	@capsizecss/metrics/robotoMono	Material Design

import sourceCodePro from "@capsizecss/metrics/sourceCodePro"

capsizeRadixPlugin({
  outputPath: `./public/typography.css`,
  defaultFontStack: [inter, arial],
  codingFontStack: [sourceCodePro],
})

Don't forget to import the font CSS:

import "@fontsource/source-code-pro/latin.css"

Full Example

// vite.config.ts
import { defineConfig } from "vite"
import react from "@vitejs/plugin-react"
import { capsizeRadixPlugin } from "vite-plugin-capsize-radix"
import playfairDisplay from "@capsizecss/metrics/playfairDisplay"
import firaSans from "@capsizecss/metrics/firaSans"
import sourceCodePro from "@capsizecss/metrics/sourceCodePro"
import georgia from "@capsizecss/metrics/georgia"
import arial from "@capsizecss/metrics/arial"

export default defineConfig({
  plugins: [
    react(),
    capsizeRadixPlugin({
      outputPath: `./public/typography.css`,
      headingFontStack: [playfairDisplay, georgia],
      defaultFontStack: [firaSans, arial],
      codingFontStack: [sourceCodePro],
    }),
  ],
})

// main.tsx
import React from "react"
import ReactDOM from "react-dom/client"
import { Theme } from "@radix-ui/themes"
import App from "./App"

// CSS imports in correct order
import "@radix-ui/themes/styles.css"
import "@fontsource/playfair-display/latin.css"
import "@fontsource/fira-sans/latin.css"
import "@fontsource/source-code-pro/latin.css"
import "/typography.css"
import "./App.css"

ReactDOM.createRoot(document.getElementById("root")!).render(
  <React.StrictMode>
    <Theme accentColor="indigo">
      <App />
    </Theme>
  </React.StrictMode>
)