Plane — Design System

light · modern · medium · tailwind · confidence 90% · deep decode

Plane plays the open-source Linear: Satoshi at 58px on a precise variable weight of 430 — deliberately between regular and medium — in near-black lab() ink, with Inter at 16px and 8px-radius charcoal buttons. Project views, self-host panels and ISO badges argue enterprise-readiness while the type stays startup-crisp; issue tracking with its tie loosened exactly one notch.

Open in Mozaika →

This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/ds/plane.

Tokens

Plane's decoded design system: background #F7F7F8, text #1D1F20, accent #006399, link #006399, primary #006399; type scale h1 58px / h2 44px / body 16px; 8px spacing base; 8px base radius. The single interactive/action color is #090B0C — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #090B0C — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent, link are all #006399 — one role, not several (the action color).
• accent #006399 — accent for emphasis — keep it rare on the page.

Typography

• Heading: Satoshi
• Body: Inter
• h1: 58px
• h2: 44px
• body: 16px

Spacing

• base unit: 8px
• scale: 2px, 4px, 6px, 8px, 12px, 16px, 20px, 24px, 28px, 32px

Radii

• base: 8px
• button: 8px

Motion

Micro-interactions run at 150ms (dominant) with cubic-bezier(0.4, 0, 0.2, 1).

• durations: 150ms · 300ms
• easings: cubic-bezier(0.4, 0, 0.2, 1)
• animated properties: color, background-color, border-color, outline-color

Native design tokens

…and 110 more measured on the page.

Button states (measured)

• primary hover: background lab(11.5955 -0.604004 -0.857303)
• primary focus: background lab(34.7974 -1.3694 -1.94997)

Layout (measured)

• container max-width: 1260px
• nav: 58px
• common grid: 3 columns

Motion choreography (measured)

Scroll reveal: 2 elements rest at opacity 0, animate in over 0.3s cubic-bezier(0.4, 0, 0.2, 1).

Responsive (measured)

• breakpoints: 640px · 768px · 1024px · 1280px · 1536px
• mobile (390px): hero 36px · nav hamburger

Per-section tokens (13)

• Hero — light · bg #FFFFFF · text #27363E · 1 col · left
• Logo Wall — light · bg #FFFFFF · text #2E424C · 2 col · split
• Bento Grid — light · bg #FFFFFF · text #D6D7D6 · 2 col · split
• Testimonial / Social Proof — light · bg #FFFFFF · text #375362 · 2 col · split
• Feature — dark · bg #0F0F0F · text #FFFFFF · 1 col · left
• Stats / Metrics — light · bg #FFFFFF · text #0F0F0F · 1 col · left
• Feature — light · bg #FFFFFF · text #0F1010 · 1 col · left
• Feature — dark · bg #0F0F0F · text #FFFFFF · 1 col · left
• Integrations — light · bg #FFFFFF · text #CCCDCB · 2 col · split
• Feature — dark · bg #0F0F0F · text #FFFFFF · 1 col · left
• Feature — dark · bg #181A1C · text #829CA9 · 1 col · left
• CTA / Sign-up — dark · bg #0F0F0F · text #9CA9AF · 1 col · left
• Footer — dark · bg #0F0F0F · text #555657 · 2 col · split

Export: DESIGN.md

# Plane — Design System

> light, modern, medium, tailwind — deep decode (measured live)

Plane plays the open-source Linear: Satoshi at 58px on a precise variable weight of 430 — deliberately between regular and medium — in near-black lab() ink, with Inter at 16px and 8px-radius charcoal buttons. Project views, self-host panels and ISO badges argue enterprise-readiness while the type stays startup-crisp; issue tracking with its tie loosened exactly one notch.

## Colors

| Role | Value |
|------|-------|
| bg | `#F7F7F8` |
| surface | `#E9EAEB` |
| border | `#D6D6D7` |
| text | `#1D1F20` |
| text_muted | `#6F7172` |
| primary | `#006399` |
| accent | `#006399` |
| link | `#006399` |
| button_bg | `#090B0C` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#090B0C` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `accent`, `link` are all `#006399` — one role, not several.
- **accent** `#006399` — accent for emphasis — keep it rare on the page.
- **Page coverage** (full-page screenshot pixels): `#FFFFFF` 83.2% · `#8EB0C1` 4.6% · `#131D22` 3.6% · `#E7E9EA` 3.6%

## Typography

- Heading: **Satoshi**
- Body: **Inter**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 58px / 430 · lh 75px · tracking -1.74px |
| h2 | 44px / 430 · lh 57px · tracking -1.32px |
| h3 | 24px / 430 · lh 36px |
| body | 14px / 430 · lh 21px |
| small | 13px / 500 · lh 20px |

- Weight ladder: 400 · 430 · 500 · 570 · 600 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Satoshi — free, on Fontshare. Inter — free, on Google.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 2px, 4px, 6px, 8px, 12px, 16px, 20px, 24px, 28px, 32px — snap all gaps/padding to these
- section rhythm: 80px top/bottom padding per section (measured)

## Radius
- base: 8px
- button: 8px
- card: 8px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `lab(2.88725 -0.35163 -0.52478)` / `lab(100 0 0)` | none | 8px | 6px 12px 6px 12px | 500 14px | none |
| secondary | `lab(100 0 0)` / `#000000` | 1px solid lab(94.7027 -0.211328 -0.296319) | 6px | 8px 12px 8px 12px | 600 14px | none |

**States (measured, not guessed)**

- primary hover: background `lab(11.5955 -0.604004 -0.857303)`
- primary focus: background `lab(34.7974 -1.3694 -1.94997)`
- secondary hover: border `1px solid lab(92.9178 -0.295669 -0.414813)` · background `lab(98.238 -0.0635386 -0.0888944)`
- transition: `color 0.15s cubic-bezier(0.4, 0, 0.2, 1)`

## Motion
- durations: 150ms (dominant) · 300ms
- easings: `cubic-bezier(0.4, 0, 0.2, 1)` (dominant)
- animated properties: color, background-color, border-color, outline-color

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--alpha-white-0` | `lab(100% 0 0/0)` |
| `--alpha-white-100` | `lab(100% 0 0/.05)` |
| `--alpha-white-200` | `lab(100% 0 0/.1)` |
| `--alpha-white-300` | `lab(100% 0 0/.15)` |
| `--alpha-white-400` | `lab(100% 0 0/.2)` |
| `--alpha-white-500` | `lab(100% 0 0/.3)` |
| `--alpha-white-600` | `lab(100% 0 0/.4)` |
| `--alpha-white-700` | `lab(100% 0 0/.5)` |
| `--alpha-white-800` | `lab(100% 0 0/.6)` |
| `--alpha-white-900` | `lab(100% 0 0/.7)` |
| `--alpha-white-1000` | `lab(100% 0 0/.8)` |
| `--alpha-white-1100` | `lab(100% 0 0/.9)` |

_…and 108 more measured on the page._

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1260px · common grid: 3-col
- nav: 58px · border-bottom 1px solid lab(92.9178 -0.295669 -0.414813) · bg lab(100 0 0)

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 58 | 1167 | — | — | 0/0 | — |
| 1225 | 281 | 6 | 24 | 64/0 | — |
| 1506 | 1404 | — | — | 80/80 | — |
| 2910 | 714 | 3 | 24 | 80/80 | — |
| 3625 | 1128 | — | — | 80/80 | — |
| 4752 | 766 | — | — | 80/80 | — |

## Motion choreography (measured)
- scroll reveal: 2 elements rest at opacity 0, animate in over 0.3s cubic-bezier(0.4, 0, 0.2, 1) (0 revealed during the drive).

Rebuild the timeline, not just the durations — order, delays and staggers above are the choreography.

## Responsive (measured)
- breakpoints: 640px · 768px · 1024px · 1280px · 1536px
- mobile (390px): hero 36px · body 16px · nav: hamburger

## How to apply
Paste the Tailwind `@theme` (or CSS variables) as your base, then build each
section to its spec — verify every color, radius, and font against these tokens.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

---

> **Decoded with Mozaika** — measured live, not guessed. Full decoded design system + one-command install: mozaika.design/ds/plane

Export: Tailwind v4 (@theme)

@theme {
  /* action color #090B0C — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #F7F7F8;
  --color-surface: #E9EAEB;
  --color-border: #D6D6D7;
  --color-text: #1D1F20;
  --color-text-muted: #6F7172;
  --color-primary: #006399;  /* a brand color — but the call-to-action uses #090B0C, not this. */
  --color-accent: #006399;  /* accent for emphasis — keep it rare on the page. */
  --color-link: #006399;  /* inline text links and link-styled controls. */
  --color-button-bg: #090B0C;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* fonts: Satoshi — free, on Fontshare. Inter — free, on Google. */
  --font-heading: "Satoshi", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  /* measured weights: 400, 430, 500, 570, 600 — use these, not 400/600 */
  --text-hero: 58px; --font-weight-hero: 430; --leading-hero: 75px; --tracking-hero: -1.74px;
  --text-h2: 44px; --font-weight-h2: 430; --leading-h2: 57px; --tracking-h2: -1.32px;
  --text-h3: 24px; --font-weight-h3: 430; --leading-h3: 36px;
  --text-body: 14px; --font-weight-body: 430; --leading-body: 21px;
  --text-small: 13px; --font-weight-small: 500; --leading-small: 20px;
  --radius-base: 8px;
  --radius-button: 8px;
  --radius-card: 8px;
  --color-btn-hover: lab(11.5955 -0.604004 -0.857303);  /* measured primary hover fill */
  --ease-brand: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;  /* use: duration-[var(--duration-fast)] */
  --duration-base: 300ms;
  --section-y: 80px;  /* per-section vertical padding (measured) */
  --spacing: 8px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 2, 4, 6, 8, 12, 16, 20, 24, 28, 32px */
}

Export: CSS variables

:root {
  /* action color #090B0C — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #F7F7F8;
  --surface: #E9EAEB;
  --border: #D6D6D7;
  --text: #1D1F20;
  --text-muted: #6F7172;
  --primary: #006399;  /* a brand color — but the call-to-action uses #090B0C, not this. */
  --accent: #006399;  /* accent for emphasis — keep it rare on the page. */
  --link: #006399;  /* inline text links and link-styled controls. */
  --button-bg: #090B0C;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --font-heading: "Satoshi", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --text-hero: 58px; --weight-hero: 430; --leading-hero: 75px; --tracking-hero: -1.74px;
  --text-h2: 44px; --weight-h2: 430; --leading-h2: 57px; --tracking-h2: -1.32px;
  --text-h3: 24px; --weight-h3: 430; --leading-h3: 36px;
  --text-body: 14px; --weight-body: 430; --leading-body: 21px;
  --text-small: 13px; --weight-small: 500; --leading-small: 20px;
  --radius: 8px;
  --radius-button: 8px;
  --radius-card: 8px;
  --btn-bg-hover: lab(11.5955 -0.604004 -0.857303);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 300ms;
  --section-y: 80px;
}

/* their own tokens, verbatim from the site's :root */
:root {
  --alpha-white-0: lab(100% 0 0/0);
  --alpha-white-100: lab(100% 0 0/.05);
  --alpha-white-200: lab(100% 0 0/.1);
  --alpha-white-300: lab(100% 0 0/.15);
  --alpha-white-400: lab(100% 0 0/.2);
  --alpha-white-500: lab(100% 0 0/.3);
  --alpha-white-600: lab(100% 0 0/.4);
  --alpha-white-700: lab(100% 0 0/.5);
  --alpha-white-800: lab(100% 0 0/.6);
  --alpha-white-900: lab(100% 0 0/.7);
  --alpha-white-1000: lab(100% 0 0/.8);
  --alpha-white-1100: lab(100% 0 0/.9);
}
/* fonts: Satoshi — free, on Fontshare. Inter — free, on Google. */