MozaikaDesign system

Fly.io — Design System

light · modern · high · tailwind · confidence 92% · deep decode

Fly.io writes infrastructure docs like a storybook: P22 Mackinac serif at 64px/500 in blurple-navy #281950, 19px body, violet #7C3AED buttons with the signature lopsided 8/20/20/8 radius, and hot-air-balloon illustrations over hard engineering copy. The whimsy is load-bearing — it's how a bare-metal platform tells developers the sharp edges are intentional and documented.

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/fly-io.

Tokens

Fly.io's decoded design system: background #F1F2F9, text #0A0A0B, accent #7C3AED, link #7C3AED, primary #5A4F7A; type scale h1 64px / h2 36px / body 18px; 4px spacing base; 8px base radius. The single interactive/action color is #7C3AED — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#F1F2F9
surface#E3E4EA
border#CECFD5
text#0A0A0B
text_muted#616265
primary#5A4F7A
accent#7C3AED
link#7C3AED
secondary#281950
button_bg#7C3AED
button_text#FFFFFF

Using these colors

Typography

Spacing

Radii

Shadow

rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset, rgba(0, 0, 0, 0) 0px 0px 0px 0px

Shadows (elevation)

Motion

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

Native design tokens

TokenValue
--dot-size6px

Button states (measured)

Layout (measured)

Motion choreography (measured)

Load order: ul.shrink-0×2

Responsive (measured)

Per-section tokens (11)

Export: DESIGN.md

# Fly.io — Design System

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

Fly.io writes infrastructure docs like a storybook: P22 Mackinac serif at 64px/500 in blurple-navy #281950, 19px body, violet #7C3AED buttons with the signature lopsided 8/20/20/8 radius, and hot-air-balloon illustrations over hard engineering copy. The whimsy is load-bearing — it's how a bare-metal platform tells developers the sharp edges are intentional and documented.

## Colors

| Role | Value |
|------|-------|
| bg | `#F1F2F9` |
| surface | `#E3E4EA` |
| border | `#CECFD5` |
| text | `#0A0A0B` |
| text_muted | `#616265` |
| primary | `#5A4F7A` |
| accent | `#7C3AED` |
| link | `#7C3AED` |
| secondary | `#281950` |
| button_bg | `#7C3AED` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#7C3AED` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `accent`, `link`, `button_bg` are all `#7C3AED` — one role, not several (your action color).
- **accent** `#7C3AED` — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
- **primary** `#5A4F7A` — a brand color — but the call-to-action uses #7C3AED, not this.
- **secondary** `#281950` — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.
- **Page coverage** (full-page screenshot pixels): `#F3F4FA` 68.5% · `#7E6CA9` 11.7% · `#C8BBC6` 11.5% · `#D6E4F1` 8.2%

## Typography


| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 64px / 500 · lh 74px · tracking -2.88px |
| h2 | 36px / 500 · lh 48px · tracking -0.9px |
| body | 19px / 325 · lh 29px |
| small | 18px / 325 · lh 27px |
| eyebrow | 12px / 500 · tracking 0.3px |

- Weight ladder: 325 · 450 · 500 · 575 — use these exact measured weights, not the 400/600 defaults.

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 8px, 10px, 12px, 16px, 20px, 24px, 28px, 32px, 40px, 64px — snap all gaps/padding to these
- section rhythm: 128px top/bottom padding per section (measured)

## Radius
- base: 8px
- button: 9999px
- card: 16px
- pill: 9999px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#7C3AED` / `#FFFFFF` | none | 8px 20px 20px 8px | 0px 12px 0px 10px | 450 14.5px | rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset, rgba(0, 0, 0, 0) 0px 0px 0px 0px |
| secondary | `#8B5CF6` / `#FFFFFF` | none | 9999px | — | — | none |

**States (measured, not guessed)**

- primary hover: background `#6D28D9`
- primary focus: box-shadow `rgba(255, 255, 255, 0.1) 0px 0px 0px 3px, rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset` · background `#6D28D9`
- transition: `all 0.2s ease`

## Shadows (elevation)
- subtle: `rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(91, 33, 182, 0.1) 0px 5px 5px -2px, rgba(91, 33, 182, 0.1) 0px 2px 4px -2px`
- card: `rgb(255, 255, 255) 0px 0px 0px 0px, rgba(32, 34, 55, 0.075) 0px 0px 0px 1px, rgba(32, 34, 55, 0.05) 0px 10px 15px -3px, rgba(32, 34, 55, 0.05) 0px 4px 6px -4px`
- button: `rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset, rgba(0, 0, 0, 0) 0px 0px 0px 0px`

## Motion
- durations: 150ms (dominant) · 200ms · 300ms
- easings: `cubic-bezier(0.4, 0, 0.2, 1)` (dominant) · `ease`
- animated properties: color, background-color, border-color, text-decoration-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 |
|-------|-------|
| `--dot-size` | `6px` |

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

## Layout (measured)
- container max 1200px · common grid: 2-col
- nav: 96px relative

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 1000 | 561 | 2 | 64 | 0/0 | — |
| 1561 | 602 | 2 | 64 | 128/128 | — |
| 2164 | 548 | 2 | 64 | 128/128 | — |
| 2712 | 548 | 2 | 64 | 128/128 | — |
| 3260 | 563 | — | — | 0/0 | — |
| 3823 | 568 | 2 | 80 | 128/128 | — |
| 4391 | 643 | 2 | 64 | 128/128 | — |

## Motion choreography (measured)
Load order: `ul.shrink-0`×2 @0ms

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

## Components (measured)
- link: #FFFFFF · no underline

## Responsive (measured)
- mobile (390px): hero 32px · body 16px · nav: inline

## 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/fly-io

Export: Tailwind v4 (@theme)

@theme {
  /* action color #7C3AED — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #F1F2F9;
  --color-surface: #E3E4EA;
  --color-border: #CECFD5;
  --color-text: #0A0A0B;
  --color-text-muted: #616265;
  --color-primary: #5A4F7A;  /* a brand color — but the call-to-action uses #7C3AED, not this. */
  --color-accent: #7C3AED;  /* THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed. */
  --color-link: #7C3AED;  /* inline text links — shares the action color. */
  --color-secondary: #281950;  /* optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two. */
  --color-button-bg: #7C3AED;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* measured weights: 325, 450, 500, 575 — use these, not 400/600 */
  --text-hero: 64px; --font-weight-hero: 500; --leading-hero: 74px; --tracking-hero: -2.88px;
  --text-h2: 36px; --font-weight-h2: 500; --leading-h2: 48px; --tracking-h2: -0.9px;
  --text-body: 19px; --font-weight-body: 325; --leading-body: 29px;
  --text-small: 18px; --font-weight-small: 325; --leading-small: 27px;
  --text-eyebrow: 12px; --font-weight-eyebrow: 500; --tracking-eyebrow: 0.3px;
  --radius-base: 8px;
  --radius-button: 9999px;
  --radius-card: 16px;
  --radius-pill: 9999px;
  --shadow-card: rgb(255, 255, 255) 0px 0px 0px 0px, rgba(32, 34, 55, 0.075) 0px 0px 0px 1px, rgba(32, 34, 55, 0.05) 0px 10px 15px -3px, rgba(32, 34, 55, 0.05) 0px 4px 6px -4px;
  --shadow-subtle: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(91, 33, 182, 0.1) 0px 5px 5px -2px, rgba(91, 33, 182, 0.1) 0px 2px 4px -2px;
  --color-btn-hover: #6D28D9;  /* measured primary hover fill */
  --shadow-focus: rgba(255, 255, 255, 0.1) 0px 0px 0px 3px, rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset;  /* measured focus ring */
  --ease-brand: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;  /* use: duration-[var(--duration-fast)] */
  --duration-base: 200ms;
  --duration-slow: 300ms;
  --section-y: 128px;  /* per-section vertical padding (measured) */
  --spacing: 4px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 8, 10, 12, 16, 20, 24, 28, 32, 40, 64px */
}

Export: CSS variables

:root {
  /* action color #7C3AED — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #F1F2F9;
  --surface: #E3E4EA;
  --border: #CECFD5;
  --text: #0A0A0B;
  --text-muted: #616265;
  --primary: #5A4F7A;  /* a brand color — but the call-to-action uses #7C3AED, not this. */
  --accent: #7C3AED;  /* THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed. */
  --link: #7C3AED;  /* inline text links — shares the action color. */
  --secondary: #281950;  /* optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two. */
  --button-bg: #7C3AED;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --text-hero: 64px; --weight-hero: 500; --leading-hero: 74px; --tracking-hero: -2.88px;
  --text-h2: 36px; --weight-h2: 500; --leading-h2: 48px; --tracking-h2: -0.9px;
  --text-body: 19px; --weight-body: 325; --leading-body: 29px;
  --text-small: 18px; --weight-small: 325; --leading-small: 27px;
  --text-eyebrow: 12px; --weight-eyebrow: 500; --tracking-eyebrow: 0.3px;
  --radius: 8px;
  --radius-button: 9999px;
  --radius-card: 16px;
  --radius-pill: 9999px;
  --shadow-card: rgb(255, 255, 255) 0px 0px 0px 0px, rgba(32, 34, 55, 0.075) 0px 0px 0px 1px, rgba(32, 34, 55, 0.05) 0px 10px 15px -3px, rgba(32, 34, 55, 0.05) 0px 4px 6px -4px;
  --shadow-subtle: rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(91, 33, 182, 0.1) 0px 5px 5px -2px, rgba(91, 33, 182, 0.1) 0px 2px 4px -2px;
  --btn-bg-hover: #6D28D9;
  --focus-ring: rgba(255, 255, 255, 0.1) 0px 0px 0px 3px, rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
  --section-y: 128px;
}

/* their own tokens, verbatim from the site's :root */
:root {
  --dot-size: 6px;
}