# DESIGN.md: Webflow-style design system

Measured from https://webflow.com/ on 2026-10-14 by PikSpec (https://www.pikspec.com). An independent measurement of the rendered page, not Webflow's official design system, and not affiliated with Webflow.

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 webflow.com, measured from the live site: it should feel designed by the same team as webflow.com — the same temperament, colour, type and density — for a different product. Never use webflow.com'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://webflow.com/ — "webflow.com" (home page).
- Page frame: a top navigation bar, a persistent side panel beside the content and a footer. This is a tool- or docs-style layout, not a marketing page of stacked full-width bands.
- Content is grouped in cards (22 on the page, up to 7 side by side). Keep cards for grouped content only, not for every section.
- It uses 162 images, 118 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: 51 buttons and 6 form fields on one page — a working interface, so favour dense, functional controls over big marketing calls to action.
- 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)
- Almost entirely neutral: 97% of the page is painted in #FFFFFF and #F0F0F0.
- #146EF5 is an accent: 2.8% of the page, as small fills such as buttons and badges. Keep it to small areas.
- #1366E2 is an accent: under 0.1% of the page, used for text only. Don't fill large areas with it.
- The largest type (80px WF Visual Sans Variable) is semibold (600), tracked to -0.01em.
- Open: text covers 8% of the page. Sections sit about 160px apart.
- Structure comes from thin grid lines, not from shadows or filled cards.
- Share of the painted page: #FFFFFF 83% (dominant, backgrounds); #F0F0F0 7.9% (supporting, backgrounds); #080808 4.4% (supporting, text); #146EF5 2.8% (accent, backgrounds); #5A5A5A 1.1% (supporting, text); #D8D8D8 0.8% (detail, backgrounds and lines). Keep accents at these proportions; do not promote them to fills.
- Hairline grid: 1px lines in #D8D8D8 run both across and down the page (22 across, 4 down), dividing it into cells instead of cards.
- Small marks: 5 small decorative marks (dots, crosses or ticks under 16px) in #5A5A5A, placed at corners and edges.
- Large images: Photographs, video or raster artwork cover about 76% of the page.
- Type as set (size, weight and tracking measured together; use these pairs): 80px weight 600 tracking -0.01em; 56px weight 600; 40px weight 600; 32px weight 600; 20px weight 400; 16px 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 — 83% · backgrounds (var(--color-background))
- #F0F0F0 — 7.9% · backgrounds (var(--color-f0f0f0))
- #080808 — 4.4% · text (var(--color-text))
- #146EF5 — 2.8% · backgrounds (var(--color-action))
- #5A5A5A — 1.1% · text (var(--color-text-muted))
- #D8D8D8 — 0.8% · backgrounds, lines (var(--color-surface))
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=Figtree:wght@400;500;600&display=swap");
```
Font: webflow.com uses WF Visual Sans Variable (body) — its own licensed face, not available to download. This kit uses Figtree for body, the closest free match, 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: #FFFFFF; /* Background */
  --color-surface: #D8D8D8; /* Surface */
  --color-text: #080808; /* Text */
  --color-text-muted: #5A5A5A; /* Text muted */
  --color-border: #D8D8D8; /* Border */
  --color-action: #146EF5; /* Action */
  --color-on-action: #FFFFFF; /* On action */
  --color-f0f0f0: #F0F0F0; /* 7.9% of the page, as fills */
  --font-body: "WF Visual Sans Variable", "Figtree", sans-serif; /* WF Visual Sans Variable on the site; Figtree renders */
  --type-display-large: 80px; /* Display Large, weight 600 */
  --type-display-large-leading: 83.2px;
  --type-display-large-tracking: -0.01em;
  --type-display-medium: 56px; /* Display Medium, weight 600 */
  --type-display-medium-leading: 58.24px;
  --type-display-small: 40px; /* Display Small, weight 600 */
  --type-display-small-leading: 48px;
  --type-headline: 32px; /* Headline, weight 600 */
  --type-headline-leading: 38.4px;
  --type-title: 20px; /* Title, weight 400 */
  --type-title-leading: 30px;
  --type-body-1: 16px; /* Body 1, weight 400 */
  --type-body-1-leading: 25.6px;
  --type-body-2: 15.98px; /* Body 2, weight 500 */
  --type-body-2-leading: 19.177px;
  --type-body-2-tracking: -0.01em;
  --type-body-3: 14.4px; /* Body 3, weight 400 */
  --type-body-3-leading: 23.04px;
  --type-body-4: 14px; /* Body 4, weight 400 */
  --type-body-4-leading: 22.4px;
  --type-label: 10px; /* Label, weight 500 */
  --type-label-leading: 13px;
  --type-label-tracking: 0.1em;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-25: 100px;
  --space-30: 120px;
  --radius-sm: 2.08px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --radius-xl: 8px;
  --radius-full: 9999px;
  --elevation-1: rgba(8, 8, 8, 0.08) 0px 4px 4px 0px, rgba(8, 8, 8, 0.2) 0px 1px 2px 0px, rgba(255, 255, 255, 0.12) 0px 6px 12px 0px inset, rgba(255, 255, 255, 0.2) 0px 1px 1px 0px inset;
  --elevation-2: rgba(0, 0, 0, 0) 0px 61px 18px 0px, rgba(0, 0, 0, 0.02) 0px 39px 16px 0px, rgba(0, 0, 0, 0.06) 0px 22px 13px 0px, rgba(0, 0, 0, 0.12) 0px 2px 5px 0px, rgba(0, 0, 0, 0.1) 0px 10px 10px 0px;
  --elevation-3: rgba(0, 0, 0, 0.12) 0px 9px 4px 0px, rgba(0, 0, 0, 0.1) 0px 17px 17px 0px, rgba(0, 0, 0, 0.06) 0px 38px 23px 0px, rgba(0, 0, 0, 0.02) 0px 67px 27px 0px, rgba(0, 0, 0, 0) 0px 105px 30px 0px;
  --elevation-4: rgba(0, 0, 0, 0.29) 0px 6px 13px 0px, rgba(0, 0, 0, 0.26) 0px 24px 24px 0px, rgba(0, 0, 0, 0.15) 0px 53px 32px 0px, rgba(0, 0, 0, 0.04) 0px 95px 38px 0px, rgba(0, 0, 0, 0.01) 0px 148px 42px 0px;
  --duration-1: 0.2s;
  --duration-2: 0.3s;
  --duration-3: 0.45s;
  --ease-1: cubic-bezier(0.165, 0.84, 0.44, 1);
  --ease-2: cubic-bezier(0.455, 0.03, 0.515, 0.955);
  --ease-3: cubic-bezier(0.645, 0.045, 0.355, 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: #FFFFFF;
  --color-surface: #D8D8D8;
  --color-text: #080808;
  --color-text-muted: #5A5A5A;
  --color-border: #D8D8D8;
  --color-action: #146EF5;
  --color-on-action: #FFFFFF;
  --color-f0f0f0: #F0F0F0;
  --font-body: "WF Visual Sans Variable", "Figtree", sans-serif;
  --text-display-large: 80px;
  --text-display-large--line-height: 83.2px;
  --text-display-large--letter-spacing: -0.01em;
  --text-display-medium: 56px;
  --text-display-medium--line-height: 58.24px;
  --text-display-small: 40px;
  --text-display-small--line-height: 48px;
  --text-headline: 32px;
  --text-headline--line-height: 38.4px;
  --text-title: 20px;
  --text-title--line-height: 30px;
  --text-body-1: 16px;
  --text-body-1--line-height: 25.6px;
  --text-body-2: 15.98px;
  --text-body-2--line-height: 19.177px;
  --text-body-2--letter-spacing: -0.01em;
  --text-body-3: 14.4px;
  --text-body-3--line-height: 23.04px;
  --text-body-4: 14px;
  --text-body-4--line-height: 22.4px;
  --text-label: 10px;
  --text-label--line-height: 13px;
  --text-label--letter-spacing: 0.1em;
  --radius-sm: 2.08px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --radius-xl: 8px;
  --radius-full: 9999px;
  --shadow-e1: rgba(8, 8, 8, 0.08) 0px 4px 4px 0px, rgba(8, 8, 8, 0.2) 0px 1px 2px 0px, rgba(255, 255, 255, 0.12) 0px 6px 12px 0px inset, rgba(255, 255, 255, 0.2) 0px 1px 1px 0px inset;
  --shadow-e2: rgba(0, 0, 0, 0) 0px 61px 18px 0px, rgba(0, 0, 0, 0.02) 0px 39px 16px 0px, rgba(0, 0, 0, 0.06) 0px 22px 13px 0px, rgba(0, 0, 0, 0.12) 0px 2px 5px 0px, rgba(0, 0, 0, 0.1) 0px 10px 10px 0px;
  --shadow-e3: rgba(0, 0, 0, 0.12) 0px 9px 4px 0px, rgba(0, 0, 0, 0.1) 0px 17px 17px 0px, rgba(0, 0, 0, 0.06) 0px 38px 23px 0px, rgba(0, 0, 0, 0.02) 0px 67px 27px 0px, rgba(0, 0, 0, 0) 0px 105px 30px 0px;
  --shadow-e4: rgba(0, 0, 0, 0.29) 0px 6px 13px 0px, rgba(0, 0, 0, 0.26) 0px 24px 24px 0px, rgba(0, 0, 0, 0.15) 0px 53px 32px 0px, rgba(0, 0, 0, 0.04) 0px 95px 38px 0px, rgba(0, 0, 0, 0.01) 0px 148px 42px 0px;
  --ease-1: cubic-bezier(0.165, 0.84, 0.44, 1);
  --ease-2: cubic-bezier(0.455, 0.03, 0.515, 0.955);
  --ease-3: cubic-bezier(0.645, 0.045, 0.355, 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)" },
  fontFamily: { "body": ["var(--font-body)"] },
  borderRadius: { "sm": "var(--radius-sm)", "md": "var(--radius-md)", "lg": "var(--radius-lg)", "xl": "var(--radius-xl)", "full": "var(--radius-full)" },
  boxShadow: { "e1": "var(--elevation-1)", "e2": "var(--elevation-2)", "e3": "var(--elevation-3)", "e4": "var(--elevation-4)" },
}
```

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-body); margin: 0; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--color-action); outline-offset: 2px; }
```

3. COMPONENTS — MATCH THESE EXACTLY
```css
.button { /* Primary */
  background: var(--color-action);
  border-radius: var(--radius-full);
  padding: var(--space-1);
  min-height: 40px;
  color: var(--color-on-action);
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 25.6px;
}
.button-2 { /* Secondary */
  background: #080808;
  border-radius: 50%;
  min-height: 36px;
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 25.6px;
  /* recorded states: disabled, focus-visible, hover */
}
.button-3 { /* Secondary 2 */
  background: var(--color-action);
  padding: 12px 0px 12px 0px;
  min-height: 46px;
  color: var(--color-on-action);
  font-family: var(--font-body);
  font-size: var(--type-body-4);
  font-weight: 500;
  line-height: 22.4px;
  /* recorded states: active, hover, focus-visible */
}
.link-3 { /* Inline 3 */
  background: transparent;
  min-height: 24px;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 24px;
  /* recorded states: active, hover, focus-visible */
}
.card { /* Default */
  background: var(--color-f0f0f0);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 25.6px;
}
.card-2 { /* Alternative 1 */
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  min-height: 330px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 25.6px;
}
.card-3 { /* Alternative 2 */
  background: var(--color-background);
  border: 1px solid #D8D8D8;
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  min-height: 82px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 25.6px;
}
.input { /* Default */
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  min-height: 74px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--type-body-1);
  font-weight: 400;
  line-height: 24px;
}
```
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 #FFFFFF. 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 right. Leave a [content: hero image or video] slot there, at least half the screen wide; the opening is not text alone.
- #146EF5 is the action colour. Fill the primary action with it and little else — at most one #146EF5-filled element per screen; other accents keep to the uses listed above.
- Type: Figtree (standing in for WF Visual Sans Variable) for body. Hierarchy comes from size and weight, not colour or decoration.
- Everything sits on a 4px grid.
- Corner radii are 2.08px, 4px, 6px, 8px, fully round (pill) — nothing else.
- Body text uses WF Visual Sans Variable at around 16px, weights 400, 500, 550, 600.
- Headings use the same family as body text; the largest heading is 80px.
- Primary buttons are #146EF5, square-cornered, weight 500.
- Cards use 4px corners.
- Corner radii in use: 8px, 4px, 9999px (pill), 6px, 2.08px.

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 — 812px tall, 2 equal columns, left-aligned 80px heading (weight 600), image on the right.
2. Text — 84px tall, image on the left.
3. Split — 1268px tall, split 7 / 5, 110px gap, left-aligned 32px heading (weight 600) set low in the band, image behind the content.
4. Cards — 1162px tall, 6 equal columns, left-aligned 56px heading (weight 600), image on the left.
5. Split — 994px tall, split 5 / 7, 110px gap, left-aligned 56px heading (weight 600), image on the right.
6. Cards — 566px tall, 3 equal columns, 164px gap, left-aligned 40px heading (weight 600), image on the left.
7. Statement — 900px tall, centred 80px heading (weight 600), image on the left.
8. Footer — 1306px tall, 4 equal columns, left-aligned 20px heading (weight 500).
- Content runs 1354px wide with 71px side margins at 1440px; there is no narrower centred container.
- A 68px header stays fixed at the top.
- The hero is 812px (0.9 screens): 2 equal columns, left-aligned 80px heading (weight 600), image on the right.
- Column splits on a 12-column grid: halves, 7/5, sixths, 5/7; gaps of 110px.
- Headings align left (6 of 7 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 994px 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 5 words.
- Headings are in sentence case (only the first word capitalised).
- The page describes itself in about 25 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 1315px wide, centred, with var(--space-4) (16px) side padding on small screens.
- The largest heading scales fluidly: font-size: clamp(40px, 5.6vw, 80px). 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 (20:1), Text muted on Background (6.9:1), Action on Background (4.6:1), Text on Surface (14.1:1), Text muted on Surface (4.8:1) and On action on Action (4.6:1).
- Only for text 24px and up, or 18.66px bold: Action on Surface (3.2:1).
- 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)
- Corners at most 8px, plus fully rounded pills where the components use them. No 12–24px "friendly" rounding. (The largest measured radius is 8px.)
- No gradients: not in backgrounds, text, buttons or borders. (No gradient was measured.)
- Only these colours: #FFFFFF, #F0F0F0, #080808, #146EF5, #5A5A5A, #D8D8D8. 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.)
- #146EF5 only as small fills (buttons, badges) — never a section background or a large panel. (It covers 2.8% of the page.)
- #1366E2 only for text — never as a section background or a large panel. (It covers under 0.1% of the page.)
- Only the fonts in the tokens: Figtree for body. No other typeface, and no Inter, Roboto or system UI font unless it is one of these. (The page is set in WF Visual Sans Variable; the tokens carry what stands in for them.)
- Headings and large text never heavier than weight 600. Do not make headlines bold to add emphasis. (Every size from 24px up is set at weight 600 or lighter.)
- Large headlines tracked tight (letter-spacing -0.01em), not at the browser default. (The 80px headline is set at -0.01em.)
- 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.)
- The hero is left-aligned. Do not centre it. (The captured hero sets its heading on the left.)
- Build the sections your product needs, not the original's list. Give each one this system's look: its kinds of section (hero, text, split, cards, 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 shadows other than the levels listed.
- Do not use webflow.com'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.
- No border-radius above 8px except pills.
- 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.
- #146EF5 covers about 2.8% of the page or less, as on the original.
- #1366E2 covers about 0.1% of the page or less, as on the original.
- No text 24px or larger has a font-weight above 600.
- The largest headline uses letter-spacing -0.01em.
- 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.