# DESIGN.md: Zed-style design system

Measured from https://zed.dev/ on 2026-10-15 by PikSpec (https://www.pikspec.com). An independent measurement of the rendered page, not Zed's official design system, and not affiliated with Zed.

Use it to build your own product in this design language: put this file in your project root and tell your AI tool (Claude Code, Cursor, Codex, Lovable, v0) to follow DESIGN.md. Never use the original's name, logo, copy or images; licensed fonts are replaced with the closest free Google Fonts.

To capture any other page, or get a ready project for your tool: https://www.pikspec.com/build-with-ai

HOW IT SHOULD LOOK
Build it in the design language of zed.dev, measured from the live site: it should feel designed by the same team as zed.dev — the same temperament, colour, type and density — for a different product. Never use zed.dev's name, logo, words or images.

Stack: use the one your project already has. Starting fresh: React + Vite + TypeScript + Tailwind CSS v4, with no UI kit (no shadcn/ui, MUI or Chakra) — their defaults would override this system. In a chat that shows one file (an artifact or canvas), build one HTML file instead, with the tokens below in its <style> block.
Use every value exactly as written. Do not round, rename, approximate or substitute a colour, size, radius, shadow or easing (fonts: see section 1). Anything not listed here does not exist in this system.

THE WEBSITE THIS SYSTEM COMES FROM
- Reference page: https://zed.dev/ — "zed.dev" (home page).
- Page frame: a top navigation bar and a footer.
- Content is grouped in cards (5 on the page). Keep cards for grouped content only, not for every section.
- It uses 417 images including 6 videos, 7 of them large. Large, real product imagery is part of the look — leave clearly labelled image slots at those sizes rather than stock photos or abstract 3D shapes.
- Interaction: 63 buttons and 1 form field on one page.
- The page runs about 9 screens long at 1440px wide.
- Density is moderate.

HOW IT LOOKS (WHAT MAKES IT LOOK LIKE ITSELF, BEYOND THE VALUES)
- Mostly neutral: 75% of the page is #FFFFFF and #F4F4F2 and other neutrals.
- #1348DC is an accent: 11.5% of the page, as one of a few coloured bands or panels. Use it for a band or two, never as the page ground.
- #2B7FFF is an accent: 10% of the page, used for drawings only. Don't fill large areas with it.
- The largest type (48px plexSerif) is light, not bold (340), tracked to -0.02em.
- Balanced: text covers 14% of the page. Sections sit about 14px apart.
- Line drawings alongside large images.
- Structure comes from thin grid lines, not from shadows or filled cards.
- Share of the painted page: #FFFFFF 44% (dominant, backgrounds); #1348DC 11.5% (accent, backgrounds and drawings); #2B7FFF 10% (accent, drawings); #F4F4F2 9.1% (supporting, backgrounds); #000000 5% (supporting, text and drawings); #DCDCDD 3.7% (detail, backgrounds); #393D45 3.3% (supporting, text); #EBEBEC 2.6% (detail, backgrounds). Keep accents at these proportions; do not promote them to fills.
- Hairline grid: 1px lines in #CBCFD4 run both across and down the page (148 across, 58 down), dividing it into cells instead of cards.
- Line drawings: 14 large drawings made of lines, not filled shapes: 1.5px strokes in #2B7FFF, #1348DC and #2B7FFF, with dashed lines in #2B7FFF.
- Dashed lines: Dashed lines in #2B7FFF, drawn as routes or paths in the illustrations.
- Small marks: 162 small decorative marks (dots, crosses or ticks under 16px) in #FFFFFF and #58585A, placed at corners and edges.
- Large images: Photographs, video or raster artwork cover about 115% of the page.
- Type as set (size, weight and tracking measured together; use these pairs): 48px weight 340 tracking -0.02em; 25.6px weight 390; 24px weight 400; 16.8px weight 400; 16px weight 400 tracking -0.025em; 15.2px weight 400.

1. DESIGN TOKENS — PASTE INTO YOUR GLOBAL CSS
Allowed colours, with how the original uses each. Use no other colour, including in hover states:
- #FFFFFF — 44% · backgrounds (var(--color-on-action))
- #1348DC — 11.5% · backgrounds, drawings (var(--color-action))
- #2B7FFF — 10% · drawings (var(--color-2b7fff))
- #F4F4F2 — 9.1% · backgrounds (var(--color-f4f4f2))
- #000000 — 5% · text, drawings (var(--color-000000))
- #DCDCDD — 3.7% · backgrounds (var(--color-background))
- #393D45 — 3.3% · text (var(--color-text-muted))
- #EBEBEC — 2.6% · backgrounds (var(--color-border))
- #FAFAFA — 2.1% · backgrounds (var(--color-fafafa))
- #BDC1C9 — 1.9% · drawings (var(--color-bdc1c9))
- #CBCFD4 — hairlines and grid lines
- #DADDE2 — hairlines and grid lines (var(--color-surface))
- #C9C9CA — hairlines and grid lines
- #E5E7EB — hairlines and grid lines
- #58585A — small marks
- #C6CAD0 — small marks
- #5C78E2 — small marks
- #242529 — Text (var(--color-text))
- #0997B3 — Positive (var(--color-positive))
- #D3604F — Negative (var(--color-negative))
- #AD6E25 — Warning (var(--color-warning))
Fonts — put these first in your global CSS (one import per font, so one that fails cannot stop the others):
```css
@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Figtree:wght@400;500&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@300;400;500&display=swap");
```
Font: zed.dev uses zedMono (body), writer (interface) and plexSerif (display) — its own licensed faces, not available to download. This kit uses JetBrains Mono for body, Figtree for interface and Source Serif 4 for display, the closest free matches, already in the tokens. If you own the original, add it with @font-face and it is used first; to use another font, change the --font-* variables.
Keep every size, weight, line height and tracking exactly as listed whichever font renders.
```css
:root {
  --color-background: #DCDCDD; /* Background */
  --color-surface: #DADDE2; /* Surface */
  --color-text: #242529; /* Text */
  --color-text-muted: #393D45; /* Text muted */
  --color-border: #EBEBEC; /* Border */
  --color-action: #1348DC; /* Action */
  --color-on-action: #FFFFFF; /* On action */
  --color-positive: #0997B3; /* Positive */
  --color-negative: #D3604F; /* Negative */
  --color-warning: #AD6E25; /* Warning */
  --color-2b7fff: #2B7FFF; /* 10% of the page, as drawings */
  --color-f4f4f2: #F4F4F2; /* 9.1% of the page, as fills */
  --color-000000: #000000; /* 5% of the page, as drawings */
  --color-fafafa: #FAFAFA; /* 2.1% of the page, as fills */
  --color-bdc1c9: #BDC1C9; /* 1.9% of the page, as drawings */
  --color-8ec5ff: #8EC5FF; /* 1.4% of the page, as drawings */
  --font-body: "zedMono", "JetBrains Mono", monospace; /* zedMono on the site; JetBrains Mono renders */
  --font-interface: writer, "Figtree", sans-serif; /* writer on the site; Figtree renders */
  --font-display: "plexSerif", "Source Serif 4", serif; /* plexSerif on the site; Source Serif 4 renders */
  --type-display: 48px; /* Display, weight 340 */
  --type-display-leading: 57.6px;
  --type-display-tracking: -0.02em;
  --type-headline: 25.6px; /* Headline, weight 390 */
  --type-headline-leading: 32px;
  --type-body-1: 16.8px; /* Body 1, weight 400 */
  --type-body-1-leading: 18.48px;
  --type-body-2: 16px; /* Body 2, weight 400 */
  --type-body-2-leading: 24px;
  --type-body-2-tracking: -0.025em;
  --type-body-3: 15.2px; /* Body 3, weight 400 */
  --type-body-3-leading: 16.72px;
  --type-body-4: 15px; /* Body 4, weight 400 */
  --type-body-4-leading: 22.5px;
  --type-body-5: 14px; /* Body 5, weight 400 */
  --type-body-5-leading: 20px;
  --type-body-5-tracking: -0.025em;
  --type-label-1: 13px; /* Label 1, weight 400 */
  --type-label-1-leading: 19.5px;
  --type-label-2: 12px; /* Label 2, weight 400 */
  --type-label-2-leading: 18px;
  --type-label-3: 11px; /* Label 3, weight 400 */
  --type-label-3-leading: 15.125px;
  --type-label-4: 10px; /* Label 4, weight 400 */
  --type-label-4-leading: 15px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-9: 36px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-19: 76px;
  --space-21: 84px;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-3xl: 32px;
  --radius-full: 9999px;
  --elevation-1: rgba(111, 123, 144, 0.05) 0px -2px 0px 0px inset;
  --elevation-2: rgba(111, 123, 144, 0.1) 0px -2px 0px 0px inset;
  --elevation-3: rgb(5, 55, 148) 0px -2px 0px 0px inset, rgb(230, 239, 254) 0px 1px 3px 0px;
  --elevation-4: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 1px 3px 0px, rgba(0, 0, 0, 0.1) 0px 1px 2px -1px;
  --elevation-5: rgba(7, 77, 207, 0.06) 6px 6px 0px 0px;
  --elevation-6: rgba(7, 77, 207, 0.06) 6px 6px 0px 0px, rgba(7, 77, 207, 0.06) -6px -6px 0px 0px;
  --elevation-7: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px;
  --elevation-8: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.642147 -0.00263254 -0.0210819 / 0.5) 0px 20px 25px -5px, oklab(0.642147 -0.00263254 -0.0210819 / 0.5) 0px 8px 10px -6px;
  --elevation-9: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.871997 -0.00203001 -0.00977266 / 0.8) 0px 20px 25px -5px, oklab(0.871997 -0.00203001 -0.00977266 / 0.8) 0px 8px 10px -6px;
  --elevation-10: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.810546 -0.0013966 -0.0111843 / 0.6) 0px 0px 0px 1px, oklab(0.578998 -0.00309601 -0.0247935 / 0.2) 0px 20px 25px -5px, oklab(0.578998 -0.00309601 -0.0247935 / 0.2) 0px 8px 10px -6px;
  --duration-1: 0.07s;
  --duration-2: 0.1s;
  --duration-3: 0.15s;
  --ease-1: cubic-bezier(0.4, 0, 0.2, 1);
}
```
Tailwind CSS v4 (the default for new projects): put this after `@import "tailwindcss";`. It removes Tailwind's own palette, so only these colours exist as utilities:
```css
@theme {
  --color-*: initial;
  --color-background: #DCDCDD;
  --color-surface: #DADDE2;
  --color-text: #242529;
  --color-text-muted: #393D45;
  --color-border: #EBEBEC;
  --color-action: #1348DC;
  --color-on-action: #FFFFFF;
  --color-positive: #0997B3;
  --color-negative: #D3604F;
  --color-warning: #AD6E25;
  --color-2b7fff: #2B7FFF;
  --color-f4f4f2: #F4F4F2;
  --color-000000: #000000;
  --color-fafafa: #FAFAFA;
  --color-bdc1c9: #BDC1C9;
  --color-8ec5ff: #8EC5FF;
  --font-body: "zedMono", "JetBrains Mono", monospace;
  --font-interface: writer, "Figtree", sans-serif;
  --font-display: "plexSerif", "Source Serif 4", serif;
  --text-display: 48px;
  --text-display--line-height: 57.6px;
  --text-display--letter-spacing: -0.02em;
  --text-headline: 25.6px;
  --text-headline--line-height: 32px;
  --text-body-1: 16.8px;
  --text-body-1--line-height: 18.48px;
  --text-body-2: 16px;
  --text-body-2--line-height: 24px;
  --text-body-2--letter-spacing: -0.025em;
  --text-body-3: 15.2px;
  --text-body-3--line-height: 16.72px;
  --text-body-4: 15px;
  --text-body-4--line-height: 22.5px;
  --text-body-5: 14px;
  --text-body-5--line-height: 20px;
  --text-body-5--letter-spacing: -0.025em;
  --text-label-1: 13px;
  --text-label-1--line-height: 19.5px;
  --text-label-2: 12px;
  --text-label-2--line-height: 18px;
  --text-label-3: 11px;
  --text-label-3--line-height: 15.125px;
  --text-label-4: 10px;
  --text-label-4--line-height: 15px;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-3xl: 32px;
  --radius-full: 9999px;
  --shadow-e1: rgba(111, 123, 144, 0.05) 0px -2px 0px 0px inset;
  --shadow-e2: rgba(111, 123, 144, 0.1) 0px -2px 0px 0px inset;
  --shadow-e3: rgb(5, 55, 148) 0px -2px 0px 0px inset, rgb(230, 239, 254) 0px 1px 3px 0px;
  --shadow-e4: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 1px 3px 0px, rgba(0, 0, 0, 0.1) 0px 1px 2px -1px;
  --shadow-e5: rgba(7, 77, 207, 0.06) 6px 6px 0px 0px;
  --shadow-e6: rgba(7, 77, 207, 0.06) 6px 6px 0px 0px, rgba(7, 77, 207, 0.06) -6px -6px 0px 0px;
  --shadow-e7: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px;
  --shadow-e8: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.642147 -0.00263254 -0.0210819 / 0.5) 0px 20px 25px -5px, oklab(0.642147 -0.00263254 -0.0210819 / 0.5) 0px 8px 10px -6px;
  --shadow-e9: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.871997 -0.00203001 -0.00977266 / 0.8) 0px 20px 25px -5px, oklab(0.871997 -0.00203001 -0.00977266 / 0.8) 0px 8px 10px -6px;
  --shadow-e10: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, oklab(0.810546 -0.0013966 -0.0111843 / 0.6) 0px 0px 0px 1px, oklab(0.578998 -0.00309601 -0.0247935 / 0.2) 0px 20px 25px -5px, oklab(0.578998 -0.00309601 -0.0247935 / 0.2) 0px 8px 10px -6px;
  --ease-1: cubic-bezier(0.4, 0, 0.2, 1);
}
```
Tailwind CSS v3 only: extend the theme with these instead, and use no other palette:
```js
// tailwind.config — theme.extend
{
  colors: { "background": "var(--color-background)", "surface": "var(--color-surface)", "text": "var(--color-text)", "text-muted": "var(--color-text-muted)", "border": "var(--color-border)", "action": "var(--color-action)", "on-action": "var(--color-on-action)", "positive": "var(--color-positive)", "negative": "var(--color-negative)", "warning": "var(--color-warning)" },
  fontFamily: { "body": ["var(--font-body)"], "interface": ["var(--font-interface)"], "display": ["var(--font-display)"] },
  borderRadius: { "xs": "var(--radius-xs)", "sm": "var(--radius-sm)", "md": "var(--radius-md)", "3xl": "var(--radius-3xl)", "full": "var(--radius-full)" },
  boxShadow: { "e1": "var(--elevation-1)", "e2": "var(--elevation-2)", "e3": "var(--elevation-3)", "e4": "var(--elevation-4)", "e5": "var(--elevation-5)", "e6": "var(--elevation-6)", "e7": "var(--elevation-7)", "e8": "var(--elevation-8)", "e9": "var(--elevation-9)", "e10": "var(--elevation-10)" },
}
```

2. BASE STYLES
```css
html { background: var(--color-background); }
body { margin: 0; font-family: var(--font-body); color: var(--color-text); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
h1, h2, h3 { font-family: var(--font-display); margin: 0; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--color-action); outline-offset: 2px; }
```

3. COMPONENTS — MATCH THESE EXACTLY
```css
.card { /* Default */
  background: var(--color-background);
  border-radius: var(--radius-md);
  box-shadow: var(--elevation-10);
  color: var(--color-text);
  font-family: var(--font-interface);
  font-size: var(--type-body-2);
  font-weight: 400;
  line-height: 24px;
}
.card-2 { /* Alternative 1 */
  background: #FFFFFF;
  border-radius: var(--radius-xs);
  padding: var(--space-6);
  min-height: 456px;
  font-family: var(--font-interface);
  font-size: var(--type-body-2);
  font-weight: 400;
  line-height: 24px;
}
.link { /* Inline */
  background: transparent;
  border-radius: var(--radius-sm);
  padding: 10px 10px 10px 10px;
  min-height: 82px;
  box-shadow: var(--elevation-2);
  font-family: var(--font-interface);
  font-size: var(--type-body-2);
  font-weight: 400;
  line-height: 24px;
  /* recorded states: focus, focus-visible, hover */
}
.link-3 { /* Inline 3 */
  background: transparent;
  padding: 8px 64px 8px 64px;
  min-height: 36px;
  font-family: var(--font-interface);
  font-size: var(--type-body-2);
  font-weight: 400;
  line-height: 24px;
  /* recorded states: focus, focus-visible, hover */
}
.button-2 { /* Tertiary 2 */
  background: transparent;
  padding: 8px 12px 8px 12px;
  min-height: 32px;
  font-family: var(--font-interface);
  font-size: var(--type-label-2);
  font-weight: 400;
  line-height: 16px;
  /* recorded states: collapsed, hover, focus, focus-visible */
}
.button-3 { /* Tertiary 3 */
  background: transparent;
  border-radius: var(--radius-sm);
  padding: 0px 8px 0px 10px;
  min-height: 32px;
  color: var(--color-000000);
  font-family: var(--font-interface);
  font-size: var(--type-body-5);
  font-weight: 400;
  line-height: 20px;
  /* recorded states: collapsed, focus, focus-visible, hover, disabled */
}
.nav { /* Default */
  background: transparent;
  padding: 0px 12px 0px 14px;
  min-height: 56px;
  font-family: var(--font-interface);
  font-size: var(--type-body-2);
  font-weight: 400;
  line-height: 24px;
}
.input { /* Default */
  background: transparent;
  min-height: 56px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--type-label-3);
  font-weight: 400;
  line-height: 16.5px;
  /* recorded states: focus */
}
```
Where a component lists recorded states, write those states using only the colours above; the capture saw that the state exists, not its values. Never invent a state colour.

4. PAGE COMPOSITION
- Light interface on #DCDCDD. Keep that ground; do not add a dark mode or alternate section backgrounds the system does not have.
- The opening screen carries a large image or video on the middle. Leave a [content: hero image or video] slot there, at least half the screen wide; the opening is not text alone.
- #1348DC is the action colour. Fill the primary action with it and little else — at most one #1348DC-filled element per screen; other accents keep to the uses listed above.
- Type: JetBrains Mono (standing in for zedMono) for body; Figtree (standing in for writer) for interface; Source Serif 4 (standing in for plexSerif) for display. Hierarchy comes from size and weight, not colour or decoration.
- Everything sits on a 4px grid.
- Corner radii are 2px, 4px, 6px, 32px, fully round (pill) — nothing else.
- Body text uses zedMono at around 12px, weights 400.
- Headings use plexSerif; the largest heading is 48px.
- Cards use 6px corners with a soft shadow.
- Corner radii in use: 2px, 4px, 9999px (pill), 6px, 40px.

HOW THE ORIGINAL PACES ITS PAGE (BORROW THE RHYTHM — THE OPENING, THE COLOURED BANDS, THE CARD GRIDS — NOT THE LIST; BUILD THE SECTIONS YOUR PRODUCT NEEDS)
1. Hero — 448px tall, centred 48px heading (weight 340), artwork centred.
2. Cards — 868px tall, split 1 / 10 / 1, left-aligned 15px heading (weight 400).
3. Grid — 728px tall, 5 items in 3 columns with 16px gaps, centred 25.6px heading (weight 390), artwork centred.
4. Grid — 1115px tall, 5 items in 2 columns with 0px gaps, left-aligned 25.6px heading (weight 390), artwork on the right.
5. Cards — 450px tall, 4 equal columns, centred 25.6px heading (weight 390), artwork centred.
6. Split — 567px tall, split 5 / 7, left-aligned 25.6px heading (weight 390), artwork on the right.
7. Grid — 755px tall, 20 items in 4 columns with 16px gaps, left-aligned 25.6px heading (weight 390).
8. Split — 809px tall, split 5 / 7, left-aligned 25.6px heading (weight 390), artwork on the right.
9. Text — 586px tall, left-aligned 25.6px heading (weight 390), artwork centred.
10. Cards — 579px tall, 3 equal columns, 16px gap, left-aligned 25.6px heading (weight 390), artwork centred.
11. Statement — 450px tall, centred 25.6px heading (weight 390) set low in the band, artwork centred.
12. Footer — 632px tall, split 4 / 2 / 2 / 2 / 2, 24px gap, left-aligned 15.2px heading (weight 400), artwork centred, on #1348DC.
- Content runs 1120px wide with 182px side margins at 1440px; there is no narrower centred container.
- A 57px header stays fixed at the top.
- The hero is 448px (0.5 screens): centred 48px heading (weight 340), artwork centred.
- Column splits on a 12-column grid: thirds (2×), quarters (2×), 5/7 (2×), 1/10/1; gaps of 16px.
- Headings align left (8 of 12 sections); centre only the occasional statement.
- Sections share one background; they are separated by space and lines, not colour bands.
- A typical section is about 728px tall.

COPY SHAPE (MATCH THE LENGTH AND CASE; WRITE YOUR OWN WORDS)
- The main heading is 4 words long.
- Section headings are medium length: typically 4 words.
- Heading case varies.
- The page describes itself in about 14 words; keep your intro paragraph to about that length.

5. MOTION
Interactive elements change colour, background, border and opacity with the measured timing. Animate nothing else.
```css
a, button, [role="button"], input { transition: color var(--duration-1) var(--ease-1), background-color var(--duration-1) var(--ease-1), border-color var(--duration-1) var(--ease-1), opacity var(--duration-1) var(--ease-1); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
```
No scroll-triggered fade-ins, parallax, typewriter text or bouncing elements.

6. RESPONSIVE
- The design was measured at 1440px wide. Lay it out for that width first, then let it reflow down to 360px.
- Content sits in a column at most 1120px wide, centred, with var(--space-4) (16px) side padding on small screens.
- The largest heading scales fluidly: font-size: clamp(25.6px, 3.3vw, 48px). Every other size stays fixed.
- Break on composition, not device names: a row of columns drops a column when any column would be narrower than 240px; side-by-side splits stack when either side would be narrower than 320px.
- Spacing steps never change between sizes; use smaller steps from the same list where space is tight.
- On touch screens, every link and button has a hit area of at least 44 × 44px without changing its drawn size.

7. ACCESSIBILITY
- Text pairs that pass for body copy: Text on Background (11.2:1), Text muted on Background (8:1), Action on Background (5.1:1), Text on Surface (11.2:1), Text muted on Surface (8:1), Action on Surface (5.2:1) and On action on Action (7:1).
- Use no other text-on-background pairing.
- One h1 per page, headings in order, landmarks (header, nav, main, footer), real buttons and links, a label on every field, alt text on every image, an aria-label on icon-only buttons.
- Every interactive element shows the :focus-visible outline above.

8. DO NOT (THESE ARE WHAT MAKE AI-BUILT SITES LOOK GENERIC)
- No gradients: not in backgrounds, text, buttons or borders. (No gradient was measured.)
- Only these colours: #FFFFFF, #1348DC, #2B7FFF, #F4F4F2, #000000, #DCDCDD, #393D45, #EBEBEC, #FAFAFA, #BDC1C9, #CBCFD4, #DADDE2, #C9C9CA, #E5E7EB, #58585A, #C6CAD0, #5C78E2, #242529, #0997B3, #D3604F, #AD6E25. No new tints, no Tailwind defaults (slate, indigo, violet). (They are every colour that covers a measurable part of the page, and the colours its lines and drawings use.)
- #1348DC fills a few coloured bands or panels, as in the layout — a handful at most, never the page ground and never body text. (It covers 11.5% of the page, all of it in those panels.)
- #2B7FFF only for drawings — never as a section background or a large panel. (It covers 10% of the page.)
- Only the fonts in the tokens: JetBrains Mono for body; Figtree for interface; Source Serif 4 for display. No other typeface, and no Inter, Roboto or system UI font unless it is one of these. (The page is set in zedMono and writer and plexSerif; the tokens carry what stands in for them.)
- Headings and large text never heavier than weight 400. Do not make headlines bold to add emphasis. (Every size from 24px up is set at weight 400 or lighter.)
- Large headlines tracked tight (letter-spacing -0.02em), not at the browser default. (The 48px headline is set at -0.02em.)
- No icon above every feature, no emoji, no decorative blobs, sparkles or glows. (None of these is part of the captured design; they are a coding model's defaults.)
- Build the sections your product needs, not the original's list. Give each one this system's look: its kinds of section (hero, cards, grid, split, text, statement, footer), its colours, type, shapes and spacing. (The style carries to any kind of site; the original's page was for a different product.)
- No glassmorphism, backdrop blur, glowing orbs, noise blobs or neon outlines.
- No row of three identical feature cards as the default section. Vary the layout from section to section: a split, a list, a single large statement, a table.
- No centred-everything hero with a pill badge, a gradient headline and two buttons. Lead with the most specific thing about the product.
- No filler copy: no "Unlock your potential", "Revolutionize", "Seamless", "Elevate", "Supercharge", "Next-gen" or lorem ipsum. Write plain, specific sentences a real company would publish.
- No made-up statistics, testimonials or customer logos. Leave a clearly marked [content: …] slot instead.
- No radius larger than the largest one listed.
- No shadows other than the levels listed.
- Do not use zed.dev's name, logo, copy or images. This is its design system, not its content.

BEFORE YOU FINISH
- Search your code for every colour, font size, spacing value, radius, shadow and easing, and replace anything that is not a variable above.
- Check that no [content: …] slot has been filled with invented facts.
- Search your CSS for gradient(. There should be none.
- Every colour value in your CSS is one of the allowed colours. Nothing else, including in hover states.
- #2B7FFF covers about 10% of the page or less, as on the original.
- No text 24px or larger has a font-weight above 400.
- The largest headline uses letter-spacing -0.02em.
- Every section, including ones the original does not have, uses only this system's colours, type, shapes and spacing.
- There is no placeholder copy (lorem ipsum, "Feature one", "Your headline here"). Every word is real.
- Take a screenshot at 1440px and put it beside the original. List every difference in colour, weight, spacing, alignment and imagery, and fix each before finishing. Then check 390px wide: nothing scrolls sideways and no heading runs off the screen.