---
version: alpha
name: Nextjs
description: Light design system extracted from nextjs.org (DOM-true values, Emblematic extractor 0.2.0, 2026-11-12).
colors:
  background: "#FAFAFA"
  on-surface: "#171717"
  on-surface-variant: "#4D4D4D"
  surface: "#E6E6E6"
  primary: "#0057FF"
  background-dark: "#000000"
  on-surface-dark: "#EDEDED"
  on-surface-variant-dark: "#A1A1A1"
  primary-dark: "#0057FF"
  outline-dark: "#292929"
typography:
  display-lg:
    fontFamily: Geist
    fontSize: 64px
    fontWeight: 450
    lineHeight: 1
    letterSpacing: -0.06em
  headline-md:
    fontFamily: Geist
    fontSize: 56px
    fontWeight: 450
    lineHeight: 1
    letterSpacing: -0.06em
  body-md:
    fontFamily: Geist
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  body-sm:
    fontFamily: Geist
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.429
  label-md:
    fontFamily: Geist
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.429
  mono-md:
    fontFamily: Geist Mono
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.429
rounded:
  sm: 2px
  md: 4px
  lg: 6px
  full: 9999px
spacing:
  xxs: 4px
  xs: 6px
  sm: 8px
  md: 10px
  lg: 12px
  xl: 14px
  2xl: 16px
  3xl: 24px
  4xl: 32px
  5xl: 40px
  6xl: 72px
  7xl: 144px
  base: 4px
  container: 648px
components:
  card:
    rounded: "{rounded.sm}"
    padding: 0px
  input:
    backgroundColor: "#FFFFFF"
    rounded: 0px
    padding: 0px
    height: 32px
---

# Nextjs

> Extracted from [https://nextjs.org/](https://nextjs.org/) on 2026-11-12 by Emblematic. Every value below was read from the rendered DOM (computed styles, `document.fonts`, and the fonts Chrome actually used to paint text), not estimated from pixels. When the YAML front matter and this prose disagree, the YAML wins. Copy values from this file exactly; don't transcribe them from memory. Don't copy logos, imagery, illustrations or marketing copy.

## Overview

Nextjs uses a light canvas (#FAFAFA) with a palette led by #0057FF. Type is set in **Geist** (display + body), **Geist Mono** (mono), with 16px body text. Layout: 648px container, top-sticky navigation, 10 sections. Built with next.js, tailwind, radix-ui, shadcn/ui, vercel.

## Colors

Area-weighted from painted backgrounds, text and borders on the 1440px light capture. Roles are inferred from usage (largest background, most text, interactive fills). Every hex is an exact computed value; a role marked *unverified* is a best guess that has not passed review, so its canonical token (e.g. `primary`) is left out of the front matter.

| Token | Hex | OKLCH | Role | Share of paint | CSS variable |
|---|---|---|---|---|---|
| `background` | `#FAFAFA` | 0.985 0 0 | bg | 84.8% | `--ds-background-200` |
| `on-surface` | `#171717` | 0.205 0 0 | text | 6.8% | `--shiki-color-text` |
| `on-surface-variant` | `#4D4D4D` | 0.42 0 0 | muted | 3.9% | `--ds-gray-900` |
| `surface` | `#E6E6E6` | 0.925 0 0 | surface | 2.3% | `--ds-gray-300` |
| `primary` | `#0057FF` | 0.537 0.257 262.5 | accent | 1.7% | `--color-next-blue` |

Contrast: text on background 17.18:1, muted text 8.1:1, accent 5.28:1.

Gradients in use: `linear-gradient(in srgb, color(srgb 0.98 0.98 0.98 / 0), color(srgb 0.98 0.98 0.98 / 0.57) 50%, rgb(250, 250, 250) 88%)`; `linear-gradient(to right, rgba(0, 0, 0, 0) 0%, rgb(235, 235, 235) 10%, rgb(235, 235, 235) 90%, rgba(0, 0, 0, 0) 100%)`.

The site responds to `prefers-color-scheme: dark`; the `-dark` tokens hold the dark-mode roles.

## Typography

| Family | Role | Weights | Share of text | Source |
|---|---|---|---|---|
| **Geist** (CSS: `GeistSans`) | display, body | 400, 450, 500, 550, 600 | 99.6% | webfont |
| **Geist Mono** | mono | 400 | 0.40% | webfont |

Scale (px): 14, 16, 18, 24, 32, 56, 64. Effective ratio ≈ 1.32 (close to a perfect fourth). Body 16px at line-height 1.5; display 64px with tracking -0.06em. Headings are sentence case. On a 390px viewport the body is 16px and display 40px.

## Layout

Spacing follows a 4px base unit; the most used steps are 4, 6, 8, 10, 12, 14, 16, 24, 32, 40, 72, 144px. Sections open with about 144px of space before their first line of text. Content sits in a 648px container on a 12-column grid. Text density 0.116 (text area / page area).

Section order (desktop). Kinds below the review threshold are shown as *section*:

1. **nav** (64px, bg #FAFAFA)
2. **logos** (64px, bg #FAFAFA)
3. **hero** — “The React Framework for the Web” (694px, bg #FAFAFA)
4. **section** — “Everything you need to build great products on the web” (1406px, bg #FAFAFA)
5. **section** — “Built on a foundation of fast, production-grade tooling” (856px, bg #FAFAFA)
6. **section** — “The framework of choice when it matters” (912px, bg #FAFAFA)
7. **testimonials** (704px, bg #FAFAFA)
8. **section** — “Get started in seconds” (876px, bg #FAFAFA)
9. **section** — “Ready to deploy?” (249px, bg #FAFAFA)
10. **footer** — “Legal” (560px, bg #FAFAFA)

## Elevation & Depth

Style: flat. Most used shadows:

- `rgba(0, 0, 0, 0.04) 0px 2px 2px 0px`

## Shapes

Dominant corner radius 2px; radii in use: 2px, 4px, 6px, pill. Borders: hairline (1px).

## Components

- **card**: rounded `2px`, padding `0px`, border `1px solid #E6E6E6`
- **input**: rounded `0px`, height `32px`, padding `0px 12px`, backgroundColor `#FFFFFF`

## Do's and Don'ts

- Do reserve `#0057FF` for primary actions and highlights; it covers only 1.7% of the painted page.
- Do set body copy in Geist at 16px / 1.5.
- Do tighten large headlines (-0.06em at 64px).
- Don't introduce font weights beyond 400, 450, 500, 550, 600.
- Don't add drop shadows; depth comes from tone and borders.
- Do keep corners at 2px for most controls, and use the larger radii only for cards and media.
- Do snap spacing to multiples of 4px.
- Don't copy this site's logos, illustrations, photography or copy; use the system, not the brand assets.

## Provenance

Spec v2, extractor 0.2.0. Render quality: **ok**. Vision pass: not run. Fields below confidence 0.7 are hedged or left out above: `color.accent_strategy`, `components`, `layout.columns`, `layout.hero`, `layout.section_count`, `sections[].kind`, `space.section_padding_px`. Full per-field provenance is in `spec.json`.