---
version: alpha
name: fly.io
description: "Light product system built on #ffffff with #7c3aed as the primary CTA accent. Type anchored in Mackinac at 64px / weight 500. Extracted automatically from https://fly.io/ — rendered styles via getComputedStyle() + CSS custom properties (token-only values may not be painted)."
narrative: |
fly.io is built on a pure-white canvas (rgb(255,255,255)).
The system uses rgb(124, 58, 237) as the high-saturation accent for primary actions.
Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside Mackinac as the primary typeface.
A layered elevation system (11 distinct shadows) building a clear front-to-back hierarchy.
Motion is a first-class concern — 17 keyframe animations plus transition-driven interactions.
colors:
background: "#ffffff"
surface-1: "#ffffff"
surface-2: "rgba(255, 255, 255, 0.75)"
ink: "rgba(40, 25, 80, 0.75)"
ink-subtle: "#202237"
primary: "#7c3aed"
on-primary: "#ffffff"
primary-hover: "rgba(40, 25, 80, 0.75)"
hairline: "rgba(255, 255, 255, 0)"
typography:
display-xl:
fontFamily: "Mackinac, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
fontSize: 64px
fontWeight: 500
lineHeight: 1.15
letterSpacing: -2.88px
body:
fontFamily: "Fricolage Grotesque, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
fontSize: 16px
fontWeight: 325
lineHeight: 1.5
letterSpacing: 0
button:
fontFamily: "Fricolage Grotesque, 'SF Pro Display', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif"
fontSize: 15.5px
fontWeight: 450
lineHeight: 1.5
letterSpacing: 0
rounded:
none: 0px
xs: 8px
sm: 10px
md: 16px
lg: 9999px
xl: 10007px
pill: 9999px
spacing:
xxs: 2px
xs: 6px
sm: 20px
md: 32px
lg: 48px
xl: 56px
xxl: 72px
components:
button-pill:
backgroundColor: "{colors.hairline}"
textColor: "{colors.primary-hover}"
typography: "{typography.button}"
rounded: "{rounded.lg}"
button-ghost:
backgroundColor: "{colors.hairline}"
textColor: "{colors.primary-hover}"
typography: "{typography.button}"
rounded: "{rounded.none}"
padding: 10px 12px
button-pill-2:
backgroundColor: "{colors.on-primary}"
textColor: "{colors.ink-subtle}"
typography: "{typography.button}"
rounded: "{rounded.md}"
padding: 0px 10px 0px 12px
navigation-main-nav:
backgroundColor: "{colors.hairline}"
typography: "{typography.button}"
rounded: "{rounded.none}"
padding: 0px 32px
extracted_at: "2026-06-11T06:09:49.647Z"
completeness: 71
scoreVersion: "v2"
---
# Design System — fly.io
> Extracted automatically by Prism from https://fly.io
> Date: 2026-06-11
> Viewport: Desktop 1440x900 + Mobile 390x844
> Values are extracted, not hand-written: rendered styles via getComputedStyle() + colors declared in CSS custom properties (token-only values are marked `(token)` and may not be painted).
## 0. Design DNA
**Density**: sparse | **Motion**: expressive | **Weight**: medium | **Aesthetic**: soft-rounded
| Dimension | Value | Signal |
|---|---|---|
| Canvas | neutral | `#ffffff` |
| Type posture | sans-led (Fricolage Grotesque) | "Build fast. Run any code" |
| Color assertion | dual-accent | #7c3aed |
| Whitespace | sparse | section rhythm 70px |
| Interaction | expressive | 17 keyframes, 12 transitions |
| Radius language | soft-pill | from token scale |
**Prism fingerprint**: `neutral-canvas · sans-display · dual-accent · soft-pill · expressive-motion`
> **🤖 TL;DR for AI agents** (read this first — saves you scanning the full doc):
>
> - **Canvas**: `rgb(255,255,255)` is the page background. Every component composits against this.
> - **Accent**: `rgb(124, 58, 237)` for primary CTAs ONLY. Never decorative.
> - **Body type**: 16px (token: `typography.body`). Default for ALL text not in a heading role.
> - **Section rhythm**: 70px between major bands. Card padding: 48px.
> - **Default radius**: 10px on buttons/inputs. Pills (`9999px`) only for icon-buttons or status chips.
>
> **Before generating UI**: import this DESIGN.md, scan §2 (Color Palette) + §4 (Components) + §10 (Agent Guide). Skip §11–12 unless extending.
## 1. Visual Theme & Atmosphere
**Signature:** a gradient wash in the hero. This is the brand's most recognizable visual — reproduce it, don't replace it with a generic card or flat panel.
fly.io uses a pure-white canvas (`#ffffff`), letting typography, color and imagery carry the visual weight.
Headlines are set in **Mackinac**, a sans-serif display face (the dominant type signature, e.g. "Build fast. Run any code" at 64px). Body text is set in **Fricolage Grotesque**. Negative letter-spacing at display sizes (-2.88px at 64px) compresses headlines into engineered blocks, dense and precise.
Body text reads in Translucent #281950 (75%) (`rgba(40, 25, 80, 0.75)`) — softened from pure black, a small but deliberate detail that lowers reading friction. **Violet** (`#7c3aed`) is the single high-saturation color in the system — it earns its presence only on interactive elements, making CTAs and links the unmistakable focal points against the otherwise neutral palette. Elevation is built from multi-layer shadow stacks (11 distinct) — each combines several blurred layers at varying offsets to build a clear front-to-back hierarchy.
Border radius varies from pill-shaped (fully rounded) to moderately rounded elements, creating visual rhythm. Motion design uses smooth easing curves for polished state transitions. The site uses a variable font with OPSZ axes, enabling precise weight/width control across the type hierarchy.
**Key Characteristics:**
- Background: Pure White (`#ffffff`)
- Primary typeface: Fricolage Grotesque
- Primary text: Translucent #281950 (75%) (`rgba(40, 25, 80, 0.75)`)
- Accent: Violet (`#7c3aed`)
- Display: 64px weight 500, letter-spacing -2.88px
- Shadow system: 11 distinct elevation levels
- Custom fonts loaded: Fricolage Grotesque, Mackinac, Fragment Mono, FragmentMono
## 2. Color Palette & Roles
### Background & Surface
- **Pure White** (`#ffffff`): Page background (primary)
- **Light Gray** (`#e7e6f4`): Surface / elevated background
- **Transparent** (`transparent`): Surface / elevated background
- **Off-White** (`#f1f2f9`): Surface / elevated background
- **Light Gray** (`#e1e4ef`): Surface / elevated background
### Text & Content
- **Translucent #281950 (75%)** (`rgba(40, 25, 80, 0.75)`): Primary body text
- **Pure Black** (`#000000`): Secondary text
- **Warm Brown** (`#202237`): Secondary text
- **Charcoal** (`#443635`): Secondary text
- **#cc0000** (`#cc0000`): Secondary text
### Accent & Interactive
- **Violet** (`#7c3aed`): Interactive / accent
- **Slate Gray** (`#676b89`): Interactive / accent
- **#ca7ff8** (`#ca7ff8`): Interactive / accent
- **Cool Gray** (`#a39ac1`): Interactive / accent
- **Emerald** (`#10b981`): Interactive / accent
- **Ring Blue** (`#3b82f6`): Interactive / accent
- **#f97316** (`#f97316`): Interactive / accent
### Border & Divider
- **Light Blue** (`#ccd0e0`): Borders / dividers
### Full Extracted Palette
**27 colors rendered on the page** + **5** more declared in design tokens (CSS custom properties — not necessarily painted). (18 categorized above + 14 additional below.)
Rendered values are read via `getComputedStyle()`; token values come from CSS variable declarations. Third-party logo colors are filtered out.
- `#f59e0b` — #f59e0b
- `#8b5cf6` — #8b5cf6
- `#fd4f00` — Bright Orange
- `#0091e2` — Sky Bright
- `#092e20` — Near Black
- `#6d28d9` — Violet
- `rgba(91, 33, 182, 0.125)` — Translucent #5b21b6 (13%)
- `rgba(219, 39, 119, 0.2)` — Translucent Cherry (20%)
- `rgba(2, 132, 199, 0.2)` — Translucent #0284c7 (20%)
- `#191034` — Deep Navy
- `#fbcfe8` — Soft Pink *(token)*
- `#ddd6fe` — #ddd6fe *(token)*
- `#c7d2fe` — Lavender *(token)*
- `#4338ca` — #4338ca *(token)*
### Gradients & Decorative Fills
- `linear-gradient(to right bottom, rgba(18, 18, 38, 0.5), rgba(34, 24, 60, 0.5), rgba(25, 16, 52, 0.5)…` — (footer)
### CSS Custom Properties (Design Tokens)
**Shadow Token**
- `--tw-ring-offset-shadow`: `0 0 #0000`
- `--tw-ring-shadow`: `0 0 #0000`
- `--tw-shadow`: `0 0 #0000`
- `--tw-shadow-colored`: `0 0 #0000`
**Spacing Token**
- `--tw-numeric-spacing`: ``
- `--tw-border-spacing-x`: `0`
- `--tw-border-spacing-y`: `0`
**Other tokens**
- `--tw-ring-color`: `rgb(59 130 246 / 0.5)`
- `--tw-ring-offset-color`: `#fff`
- `--btn-border-color`: `rgb(255 255 255 / 0)`
- `--tw-text-opacity`: `1`
- `--btn-ring-color`: `rgb(255 255 255 / .1)`
- `--btn-bg-color-active`: `#6d28d9`
- `--btn-bg-color`: `#7c3aed`
- `--btn-text-color`: `white`
## 3. Typography Rules
### Font Families
- **Primary**: `Fricolage Grotesque`
- **Secondary**: `Mackinac`
- **Font 3**: `Fragment Mono`
- **Font 4**: `FragmentMono`
### Custom Fonts Loaded
- **Fricolage Grotesque** weight 100 900 (normal)
- **Mackinac** weight 500 (normal)
- **Mackinac** weight 700 (normal)
- **Fragment Mono** weight 400 (normal)
- **FragmentMono** weight 400 (normal)
### Typography Hierarchy
| Role | Font | Size | Weight | Line Height | Letter Spacing | Notes |
|------|------|------|--------|-------------|----------------|-------|
| Display Hero | Mackinac | 64px | 500 | 1.15 | -2.88px | Main headline (h1) |
| Body | Fricolage Grotesque | 16px | 325 | 1.5 | normal | Standard reading text |
| Button | Fricolage Grotesque | 15.5px | 450 | 1.5 | normal | Button label (15.5px) |
| Button | Fricolage Grotesque | 14.5px | 450 | 1.5 | normal | Button label (14.5px) |
| Button | Fricolage Grotesque | 14.5px | 500 | 1.5 | normal | Button label (14.5px) |
### Full Font Size Scale
Sizes detected in the design (descending): `64px`, `36px`, `22px`, `19px`, `18px`, `17px`, `16px`, `15.50px`, `14.50px`, `12px`
> 6 size(s) detected outside the sampled hierarchy (36px, 22px, 19px, 18px, 17px, 12px). These appear on elements not in the sampled set — likely additional display sizes, marketing-section overrides, or third-party-widget styles.
### OpenType & Variable Font Features
**Variable font axes:**
- OPSZ axis
## 4. Component Stylings
### Buttons
**Pill**
- Background: `transparent` `{colors.hairline}`
- Text: `#281950` `{colors.primary-hover}`
- Padding: 0px
- Radius: 9999px
- Font: 14.5px weight 450
- Use: Status pills, tags, chips
**Ghost**
- Background: `transparent` `{colors.hairline}`
- Text: `#281950` `{colors.primary-hover}`
- Padding: 10px 12px
- Radius: 0px
- Font: 14.5px weight 500
- Use: Subtle action, toolbar, nav button
**Pill**
- Background: `rgba(255, 255, 255, 0.4)` `{colors.on-primary}`
- Text: `#202237` `{colors.ink-subtle}`
- Padding: 0px 10px 0px 12px
- Radius: 20px 8px 8px 20px
- Border: 1px solid rgba(255, 255, 255, 0.9)
- Shadow: `rgba(0, 0, 0, 0.1) 0px 1px 3px 0px, rgba(0, 0, 0, 0.1) 0px 1px 2px -1px`
- Font: 14.5px weight 450
- Use: Status pills, tags, chips
**Primary Brand**
- Background: `#7c3aed` `{colors.primary}`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 0px 12px 0px 10px
- Radius: 8px 20px 20px 8px
- Shadow: `rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset`
- Font: 14.5px weight 450
- Use: Primary CTA / brand action
**Outline**
- Background: `transparent` `{colors.hairline}`
- Text: `#ffffff` `{colors.on-primary}`
- Padding: 32px 16px
- Radius: 16px
- Border: 1px solid rgba(255, 255, 255, 0.25)
- Shadow: `rgba(91, 33, 182, 0.1) 0px 5px 5px -2px, rgba(91, 33, 182, 0.1) 0px 2px 4px -2px`
- Font: 16px weight 450
- Use: Secondary action with border
### Navigation
**Main Nav**
- Background: `transparent` `{colors.hairline}`
- Padding: 0px 32px
- Radius: none
- Font: 14.5px weight 450
- Use: Fixed/sticky flex nav — N/A items
## 4b. Component Behaviors (State Matrix)
### Interaction State Narrative
*State transitions extracted via Playwright simulation — exact values in the YAML matrix below.*
```yaml
component-behaviors:
button:
default:
bg: "rgba(0, 0, 0, 0)"
fg: "rgb(40, 25, 80)"
link:
default:
bg: "rgba(0, 0, 0, 0)"
fg: "rgb(40, 25, 80)"
navLink:
default:
bg: "rgba(0, 0, 0, 0)"
fg: "rgb(40, 25, 80)"
badge:
default:
bg: "rgba(0, 0, 0, 0)"
fg: "rgba(40, 25, 80, 0.75)"
footerLink:
default:
bg: "rgba(0, 0, 0, 0)"
fg: "rgb(163, 154, 193)"
```
**Agent usage**: Validate generated components against this matrix. If your output's `:hover` state changes properties not listed here, you are off-brand.
## 4c. Component Vocabulary (Closed System)
*This brand uses ONLY the following component vocabulary. Introducing new variants without justification breaks the system's tonal coherence.*
### Buttons
- **4 shape(s)** in this system: `Pill`, `Ghost`, `Primary Brand`, `Outline`
- **DO NOT introduce new buttons variants** without justification
### Navigation
- **1 shape(s)** in this system: `Main Nav`
- **DO NOT introduce new navigation variants** without justification
## 5. Layout Principles
### Layout Type
**top-nav + content**
### Grid
Single column, centered content
### Max Width
1200px
### Spacing System
Generous spacing — editorial breathing room
| Token | Value |
|-------|-------|
| xxs | 2px |
| xs | 6px |
| sm | 20px |
| md | 32px |
| base | 40px |
| lg | 48px |
| xl | 56px |
| 2xl | 70px |
| 3xl | 72px |
### Border Radius Scale
| Name | Value | Use |
|------|-------|-----|
| None | 0px | No rounding |
| Xs | 8px | Tiny corners (badges, micro elements) |
| Sm | 10px | Buttons, inputs, small elements |
| Md | 16px | Cards, containers |
| Lg | 9999px | Large rounded elements, pill segments |
| Xl | 10007px | Category strips, featured containers |
| Full | 9999px | Pills, avatars, circular elements |
### Shape Language
| Component | Border Radius |
|-----------|---------------|
| Buttons | `9999px` |
| Navigation | `none` |
| Page Body | `0px` |
**Shape Personality**: Sharp + Pill Contrast — Angular precision with pill-shaped accents (status badges, tags). Creates strong visual hierarchy.
**Full Radius Spectrum**: 4px, 8px, 10px, 16px, 20px, full/pill (from `allBorderRadii` scan)
## 5b. Spacing Rhythm Names
**Measured section padding**: bands use ~128px internal vertical padding (up to 198px) — **very airy / premium**. (Distinct from the gap *between* sections above.) Reproduce this generous vertical breathing room; cramped spacing is the #1 tell of a cheap clone.
*Named spacing tokens with explicit use cases. Use these names in YOUR code instead of raw pixels for consistency.*
| Name | Value | Use case |
|------|-------|----------|
| **hero** | `72px` | Top/bottom of full-bleed hero sections |
| **section** | `56px` | Between major bands (color change, content shift) |
| **subsection** | `48px` | Within a section, between content groups |
| **card** | `32px` | Card padding, list-item spacing |
| **compact** | `20px` | Form fields, tight clusters, badge padding |
| **micro** | `6px` | Icon-text gap, tag inner padding |
**Agent rule**: NEVER hardcode raw pixel values for spacing in generated UI. Always reference these named tokens (`spacing-rhythm.section`, etc.).
## 5c. Widget & Structure Library
Structural patterns extracted from the page DOM — these are the **blueprints** an agent should follow to reproduce the page architecture (not just CSS values).
**5/8 structural patterns detected.**
### Hero Pattern
- **Composition:** centered — Centered composition — heading + subheading + CTAs stacked vertically, content centered horizontally. Common for SaaS marketing pages.
- **Viewport coverage:** full-viewport hero (≥70% screen height)
- **Heading:** "Build fast. Run any code fearlessly." — 64px center-aligned
- **Subheading:** "The platform for devs who just want to ship. Powered by sandboxes that let you deploy any code with confidence."
- **Media:** present, positioned top
- **CTAs:** 1 (primary: "Deploy your app")
- **Clone instruction:** Reproduce the **centered** layout. Use the heading font-size token at the documented size. Place media top of text.
### Navigation Pattern
- **Position:** static (scrolls with page)
- **Layout:** unknown — Layout not classified
- **Height:** 36px
- **Logo:** ✓ present
- **Nav links:** 0 primary items
- **CTAs in nav:** 0 (no buttons — links only)
- **Clone instruction:** Build a static unknown navigation. Link-only — no button styling needed.
### Card Grid Pattern
- **Card count:** 4 cards detected
- **Columns (desktop):** 3-up grid
- **Card dimensions:** 536×122px (aspect 4.41:1)
- **Gap:** 64px between cards
- **Content:** ✗ no image + icon
- **Clone instruction:** Build a 3-column grid (desktop) with cards at ~4.41:1 aspect ratio. Text/icon-only cards (no photography).
### CTA Banner Pattern
- **Banner count:** 5
- **Position:** multiple
- **Visual treatment:** ✓ contrasting background✓ gradient fill
- **Primary CTA text:** "Check Em Out!"
- **Clone instruction:** Place multiple CTA banners across page sections. Use gradient background.
### Footer Pattern
- **Columns:** 2
- **Links:** 23 total
- **Height:** 408px
- **Includes:** ✗ no newsletter | ✓ social icons | ✓ copyright
- **Clone instruction:** Build a 2-column footer with ~12 links per column, social media links, and a copyright line.
## 6. Depth & Elevation
| Level | Treatment | Use |
|-------|-----------|-----|
| Flat (Level 0) | No shadow | Page background, content blocks |
| Layered (Level 1) |
`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` | Cards, elevated surfaces |
| Layered (Level 2) |
`rgba(0, 0, 0, 0.1) 0px 1px 3px 0px`,
`rgba(0, 0, 0, 0.1) 0px 1px 2px -1px` | Cards, elevated surfaces |
| Inset (Level 3) |
`rgba(67, 56, 202, 0.25) 0px 0px 0px 1px inset` | Buttons, pressed-state elements |
| Layered (Level 4) |
`rgba(86, 75, 128, 0.1) 1px 0px 0px 0px` | Cards, elevated surfaces |
**Shadow Philosophy**: Multi-layered shadow system creating natural, atmospheric depth. Each shadow level combines multiple layers for realistic elevation.
## 7. Motion & Interaction
### Dominant Easing Curves
| Curve | Semantic Name |
|-------|---------------|
| `cubic-bezier(0.4,0,0.2,1)` | Material Standard — Balanced |
| `cubic-bezier(0,0,0.2,1)` | Material Decelerate — Entrance |
### Duration Scale
| Value | Tier | Typical Use |
|-------|------|-------------|
| `150ms` | Fast | Hover states, micro-interactions |
| `200ms` | Normal | Panel open/close, navigation |
| `300ms` | Normal | Panel open/close, navigation |
| `400ms` | Slow | Hero animations, page transitions |
| `500ms` | Slow | Hero animations, page transitions |
### Copy-Paste Transition Snippets
**Color / Background**
```css
transition: color 0.15s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.15s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.15s cub...;
```
**Transform**
```css
transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
```
**All Props**
```css
transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
```
**Color / Background**
```css
transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s cubic-...;
```
### Keyframe Animation Catalog
| Animation Name | Type | Animated Props | Use Hint |
|----------------|------|----------------|----------|
| `fpFadeInDown` | Fade + Move | opacity, transform | Element entrance |
| `ping-badge` | Fade + Move | transform, opacity | Attention / status |
| `dot-one` | Fade + Move | transform, opacity | UI transition |
| `dot-two` | Slide | transform | UI transition |
| `dot-three` | Fade + Move | transform, opacity | UI transition |
| `shimmer` | Slide | transform | Loading placeholder |
| `spin` | Rotate / Spin | transform | Loading indicator |
| `bounce` | Slide | transform, animation-timing-function | Playful feedback |
| `fade` | Fade | opacity | UI transition |
| `slideY` | Slide | transform | UI transition |
| `infinite-scroll` | Slide | transform | UI transition |
| `ping` | Fade + Move | transform, opacity | Attention / status |
| `pulse` | Fade | opacity | Attention / status |
| `blink-animation` | Custom | visibility | Attention / status |
| `subtle-ping` | Fade + Move | opacity, transform | Attention / status |
| `progress-bar-stripes` | Custom | background-position-x, background-position-y | UI transition |
| `indeterminate` | Slide | transform | UI transition |
### Motion Fingerprint
- **Speed Character**: Deliberate & Calm (median duration: `300ms`)
- **Dominant Easing**: custom cubic-bezier curves
- **Animation Library**: 17 unique animations (17 total including variants)
> This design moves with deliberate & calm timing using custom cubic-bezier curves, creating a UI that feels calm and controlled.
## 8. Do's and Don'ts
### Do
- Use Translucent #281950 (75%) (`rgba(40, 25, 80, 0.75)`) for text — not pure black, it's warmer and more readable
- Use Fricolage Grotesque as the primary typeface — it defines the brand personality
- Keep font weights between 325-500 — the system uses a narrow weight range for subtle hierarchy
- Use negative letter-spacing (-2.88px) at display sizes for compressed, editorial headlines
- Use the extracted shadow patterns for elevation — they are tuned to match the brand palette
- Use full-pill radius (9999px) only for specific elements (avatars, pills, toggles)
- Use Violet (`#7c3aed`) as the primary accent — it's the brand's signature interactive color
- Use 8px 20px 20px 8px border-radius on buttons — the standard corner rounding for interactive elements
- Respect the 6px–56px spacing range — the design uses a wide scale for visual breathing room
- Make the hero full-viewport (≥70% screen height) — this design uses an immersive hero, not a tall navbar
- Use a single primary CTA in the hero — the design intentionally avoids choice paralysis
- Each card uses an icon (not photo) — the visual language is illustrative, not photographic
- Use a 3-column grid on desktop — density matters for this content type
- Repeat the primary CTA across 5 banner sections — conversion paths are layered, not single
### Don't
- Don't use pure black (`#000000`) for text — the near-black adds warmth
- Don't substitute with generic sans-serif or serif — the custom font carries the brand
- Don't use weight 700 (bold) or above — 500 is the maximum weight in this system
- Don't increase letter-spacing on headings — the type is designed to run tight at scale
- Don't invent new shadow values — use only the extracted shadow levels
- Don't apply pill radius on rectangular buttons or cards — it's reserved for specific interactive elements
- Don't introduce additional saturated accent colors — the palette is intentionally controlled
- Don't make the nav sticky — this design lets it scroll away to maximize content focus
## 7b. Enforceable Brand Rules
*Structured Do/Don't with reasoning and validation tests. Agents can programmatically verify generated UI.*
```yaml
rules:
- id: brand-canvas-001
type: do
rule: "Always use the page background `rgb(255,255,255)` as the base canvas"
why: "Every component is designed to composit against this exact tone"
test: "document.body.style.backgroundColor === 'rgb(255,255,255)'"
- id: brand-accent-001
type: do
rule: "Reserve `rgb(124, 58, 237)` for primary CTAs and brand-mark signals only"
why: "Single chromatic assertion device — overuse dilutes meaning"
test: "querySelectorAll('[style*=\"rgb(124, 58, 237)\"]').length <= 3 per fold"
```
## 9. Responsive Behavior
### Breakpoints
| Name | Width | Key Changes |
|------|-------|-------------|
| Mobile | 480px | Single column, compact spacing |
| Mobile Large | 640px | Expanded mobile layout |
| Tablet | 768px | Multi-column grids begin |
| Tablet | 1024px | Multi-column grids begin |
| Desktop | 1200px | Full feature layout |
| Large Desktop | 1367px | Maximum content width |
### Token Diff — Desktop vs Mobile
| Element | Property | Desktop | Mobile |
|---------|----------|---------|--------|
| heading | font-size | `64px` | `32px` |
| heading | line-height | `73.6px` | `38.4px` |
| heading | letter-spacing | `-2.88px` | `-1.44px` |
### Collapsing Strategy
- Headlines: 64px → 32px on mobile
- Navigation: horizontal links → hamburger menu on mobile
- Cards: multi-column → stacked vertical on mobile
- Footer: multi-column → stacked single column on mobile
### Touch Targets
- Buttons: 0px padding
- Navigation: adequate spacing between items
- Interactive elements: minimum 44px touch target recommended
### Collapsing Narrative
How the structural patterns adapt from desktop to mobile (extracted from both viewport extractions):
- **Card grid: 3-up → 1-up** — cards stack as viewport narrows, becoming a vertical list on mobile.
- **Footer columns collapse:** 2 columns (desktop) → 1 column (mobile).
## 7c. Visual Effects & Dynamic Behavior
*The live/dynamic layer beyond static CSS — reproduce these, not flat substitutes. This is often what separates a faithful clone from a wireframe.*
- **Glassmorphism** — 3 frosted/blur layer(s) (e.g. `blur(24px)`).
> **Motion fingerprint**: glassmorphism (3 layers)
## 9b. Visual Tone & Photography
**Tone:** Mixed photography + illustration
A balanced mix of photographic content and vector graphics. Photos likely carry product/lifestyle context while SVG handles icons, logos, and decorative accents.
**Canonical Brand Image (OG):**
- https://fly.io/phx/images/preview/og-7ea9380853220ced249aaf88c2332937.jpg?vsn=d (1200×630px)
*This is the image shown when the site is shared on social media — represents the brand visual essence.*
**Hero Image (above-fold dominant visual):**
- Aspect: 1.78:1 (landscape (16:9-ish))
- Rendered size: 1400×787px
- *Use this aspect ratio + composition for your clone's hero — mimicking the proportion preserves the visual hierarchy.*
**Aspect Ratio Distribution:**
- Landscape (1.15–2.3): 5 (71%)
- Portrait (<0.87): 0 (0%)
- Square (0.87–1.15): 2 (29%)
**Media Format Mix:**
- WebP: 7 (optimized photo/illustration hybrid)
- SVG: 1 (icons, illustrations, decorative geometry)
**Average rendered image size:** 529×394px
**Above-fold image count:** 1 / 7
**Decorative Patterns Detected:**
- 47 multi-stop linear gradients (mesh-like, 3+ color stops) — the brand leans on rich color transitions for visual depth
- 1 large decorative SVG shape (≥200×200px, non-icon) — likely blob/illustration accents
- 1 background pattern (non-photo url() backgrounds) — textures/illustrations as backdrops
- **Glassmorphism** detected (`backdrop-filter: blur`) — layered transparent surfaces with blur, modern OS-like aesthetic
**Clone instruction for decorative work:** This is a gradient-rich design — invest in multi-stop CSS gradients (3+ color stops), not solid backgrounds.
**Imagery Guidance for clones:**
- Mix photography and illustration intentionally: photos for product/context, vectors for icons + decorative accents.
- Respect the format split — replacing JPGs with illustrations (or vice versa) will shift the brand tone.
## 10. Agent Prompt Guide
### Quick Reference
- Background: Pure White (`#ffffff`)
- Primary text: Translucent #281950 (75%) (`rgba(40, 25, 80, 0.75)`)
- Accent: Violet (`#7c3aed`)
- Border: Transparent (`transparent`)
- Font: Fricolage Grotesque
- Body: 16px weight 325
### Example Component Prompts
- "Create a hero section on Pure White background (#ffffff). Headline at 64px Fricolage Grotesque weight 500, line-height 1.15, letter-spacing -2.88px, color rgba(40, 25, 80, 0.75)."
- "Create the primary CTA button: `#7c3aed` background, `#ffffff` text, 8px 20px 20px 8px border-radius, 0px 12px 0px 10px padding, 450 weight, Fricolage Grotesque font."
- "Build navigation: relative on `#ffffff`. Fricolage Grotesque 14.5px weight 450 for links."
### Iteration Guide
1. **Canvas**: Set the light canvas to Pure White (`#ffffff`) — every component is composited against this exact base.
2. **Typography**: All type in Fricolage Grotesque, weight range 325–500. Never exceed 500 — heavier weights break the brand's tonal restraint.
3. **Accent**: Violet (`#7c3aed`) is the sole interactive color. On hover → Translucent #281950 (75%) (`rgba(40, 25, 80, 0.75)`). Use CSS transitions, not opacity/brightness filters.
4. **Motion**: All transitions use `cubic-bezier(0.4,0,0.2,1)`. Never use linear for UI transitions — preserve the brand's easing personality.
5. **Shape**: CTAs at `0px`. Apply border-radius from the extracted scale only — don't invent intermediate values.
6. **Spacing**: Use the `--ca-space-*` token scale (6px–56px). All padding, margin, and gap values are multiples from this scale — no magic numbers.
7. **Tokens**: Import from §11 CSS Export (`--ca-*` vars). Never hardcode hex values — always reference a token so theming remains consistent.
## 11. CSS Design Tokens Raw Export
*Copy-paste ready `:root {}` block — all values extracted directly from the live site.*
```css
/* Colors */
:root {
--ca-on-primary: #ffffff;
--ca-primary-hover: #281950;
--ca-ink-subtle: #202237;
--ca-primary: #7c3aed;
--ca-hairline: transparent;
}
/* Typography */
:root {
--ca-font-primary: "Mackinac", system-ui, sans-serif;
--ca-text-display: 64px;
--ca-text-body: 16px;
--ca-text-button: 15.5px;
}
/* Spacing & Radius */
:root {
--ca-space-xxs: 2px;
--ca-space-xs: 6px;
--ca-space-sm: 20px;
--ca-space-md: 32px;
--ca-space-base: 40px;
--ca-space-lg: 48px;
--ca-space-xl: 56px;
--ca-space-2xl: 70px;
--ca-space-3xl: 72px;
--ca-radius-none: 0px;
--ca-radius-xs: 8px;
--ca-radius-sm: 10px;
--ca-radius-md: 16px;
--ca-radius-lg: 9999px;
--ca-radius-xl: 10007px;
--ca-radius-full: 9999px;
}
```
## 13. Page Structure Skeleton
*The actual layout the source site uses. Reproduce these sections in order to match the site structure.*
```yaml
page-skeleton:
- section: header
tag: header
classes: ["navbar", "relative", "z-[500]", "container"]
height: 96px
width: 1200px
layout: flex-row justify=normal
children: 5
padding: "0px 32px"
- section: hero
tag: div
classes: ["relative", "w-full", "h-full", "overflow-hidden"]
height: 6321px
width: full-bleed
layout: block
children: 8
vertical-padding: ~48px
padding: "96px 0px 0px"
- section: header
tag: header
classes: ["hero", "relative", "flex", "flex-col"]
height: 1000px
width: full-bleed
layout: flex-column justify=normal
children: 2
vertical-padding: ~169px (airy)
padding: "70px 0px 268px"
- section: feature-section
tag: main
height: 6321px
width: full-bleed
layout: block
children: 10
vertical-padding: ~198px (airy)
- section: feature-section
tag: div
classes: ["relative", "container", "lg:max-w-4xl", "m-auto"]
height: 619px
width: 896px
layout: block
children: 1
vertical-padding: ~170px (airy)
padding: "340px 32px 0px"
- section: feature-section
tag: section
classes: ["relative", "bg-white", "overflow-hidden"]
height: 561px
width: full-bleed
layout: block
children: 3
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
- section: feature-section
tag: div
classes: ["relative", "container", "mx-auto", "py-24"]
height: 561px
width: 1200px
layout: grid: 1-col gap=80px
children: 1
vertical-padding: ~128px (airy)
padding: "128px 32px"
- section: feature-section
tag: section
classes: ["relative", "bg-white", "py-24", "xl:py-32"]
height: 602px
width: full-bleed
layout: block
children: 1
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
padding: "128px 0px"
- section: feature-section
tag: div
classes: ["relative", "container", "mx-auto", "px-4"]
height: 346px
width: 1200px
layout: grid: 2-col gap=normal 64px
children: 2
padding: "0px 32px"
- section: feature-section
tag: section
classes: ["relative", "bg-white", "overflow-hidden", "py-24"]
height: 548px
width: full-bleed
layout: block
children: 3
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
padding: "128px 0px"
- section: feature-section
tag: div
classes: ["relative", "container", "mx-auto", "px-4"]
height: 292px
width: 1200px
layout: grid: 2-col gap=normal 64px
children: 2
padding: "0px 32px"
- section: feature-section
tag: section
classes: ["relative", "bg-white", "py-24", "xl:py-32"]
height: 548px
width: full-bleed
layout: block
children: 1
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
padding: "128px 0px"
- section: feature-section
tag: div
classes: ["relative", "container", "mx-auto", "px-4"]
height: 292px
width: 1200px
layout: grid: 2-col gap=normal 64px
children: 2
padding: "0px 32px"
- section: content-section
tag: section
classes: ["relative", "bg-white", "overflow-hidden"]
height: 563px
width: full-bleed
layout: block
children: 3
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
- section: content-section
tag: div
classes: ["relative", "container", "mx-auto", "py-24"]
height: 563px
width: 1200px
layout: block
children: 1
vertical-padding: ~128px (airy)
padding: "128px 32px"
- section: navigation
tag: section
classes: ["relative", "py-16", "lg:py-24", "xl:py-32"]
height: 568px
width: full-bleed
layout: block
children: 1
bg: "rgb(139, 92, 246)"
bg-treatment: linear-gradient
vertical-padding: ~128px (airy)
padding: "128px 0px"
- section: feature-section
tag: div
classes: ["container", "mx-auto", "px-4", "sm:px-6"]
height: 312px
width: 1200px
layout: block
children: 1
padding: "0px 32px"
- section: header
tag: header
classes: ["drop-shadow", "lg:max-w-xl", "xl:max-w-lg", "xl:mx-auto"]
height: 254px
width: 512px
layout: block
children: 3
- section: feature-section
tag: section
classes: ["relative", "bg-white", "py-24", "xl:py-32"]
height: 643px
width: full-bleed
layout: block
children: 1
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
padding: "128px 0px"
- section: feature-section
tag: div
classes: ["relative", "container", "mx-auto", "px-4"]
height: 387px
width: 1200px
layout: grid: 2-col gap=normal 64px
children: 2
padding: "0px 32px"
- section: feature-section
tag: section
classes: ["relative", "py-16", "lg:py-24", "xl:py-32"]
height: 644px
width: full-bleed
layout: block
children: 1
bg: "rgb(255, 255, 255)"
vertical-padding: ~72px (generous)
padding: "48px 0px 96px"
- section: feature-section
tag: div
classes: ["container", "mx-auto", "px-4", "sm:px-6"]
height: 500px
width: 1200px
layout: block
children: 4
padding: "0px 32px"
- section: logo-strip
tag: div
classes: ["container", "overflow-hidden", "mx-auto", "relative"]
height: 110px
width: 1136px
layout: block
children: 2
- section: header
tag: header
classes: ["space-y-3", "lg:max-w-xl", "xl:max-w-lg", "xl:mx-auto"]
height: 217px
width: 512px
layout: block
children: 3
- section: feature-section
tag: section
classes: ["relative", "bg-white", "py-24", "xl:py-32"]
height: 643px
width: full-bleed
layout: block
children: 1
bg: "rgb(255, 255, 255)"
vertical-padding: ~128px (airy)
padding: "128px 0px"
```
**Agent rule**: rebuild sections in this order (sorted by vertical position). Match the layout primitive (grid N-col / flex direction / block).
## 14. Copy Library (Real Content from Source)
*Actual text content extracted from the live page. Use these strings verbatim when reproducing the site — they carry the brand voice.*
```yaml
copy:
section-headings:
- "Modern Compute Without the Complexity"
- "Storage That Keeps Up"
- "VMs That Do Everything You Need"
- "Use the Tech You Love"
- "TRUSTED BY TEAMS AT"
- "Build Whatever You Can Think Up (and Give Your Users The Same Power)"
ctas:
- "Machines"
- "Sign In"
- "Get Started"
- "Deploy your app"
- "Check Em Out!"
- "Learn More"
- "Phoenix Framework"
- "Docker"
navigation:
- "Deploy your app"
- "Learn More"
- "Phoenix Framework"
- "SvelteKit"
- "Ruby on Rails"
- "Docker"
- "Django"
- "Laravel"
- "NextJS"
- "Enterprise Features"
footer-links:
- "About"
```
**Agent rule**: reuse these exact strings when generating UI. Do NOT translate or rephrase — brand voice is preserved through the original wording.
## 15. Asset Inventory (Image Roles & Ratios)
*Image inventory classified by role and aspect ratio. When reproducing the site, allocate this number of assets per role.*
```yaml
assets:
logo:
count: 12
avg-ratio: 4.19
common-aspect: "~16:6 banner"
sample-alts:
- "Builder.io"
- "Mercor"
- "Context"
product:
count: 2
avg-ratio: 0.99
common-aspect: "~1:1 square"
```
**Agent rule**: when generating placeholder images, match these counts and aspect ratios. Use neutral placeholder backgrounds for `product` (e.g. `#f5f5f5`), full-color photography hints for `hero` and `editorial`.
## 16. Component HTML Templates
*Suggested HTML markup for reproducing the key components — based on what was detected in the source DOM.*
### Button (primary action)
```html
```
_Source pattern detected: padding `10px 12px` · radius `0px` · weight `500`_
**Agent rule**: use these markup skeletons as the structural baseline. Apply tokens from §2-3 for visual styling.
## 17. Content Architecture & Resources (Links by Purpose)
*The page's links classified by purpose — the information architecture to reproduce. Categories, featured images, devices and projects are extracted from the rendered DOM, not guessed.*
**By purpose:** **nav** 20 · **cta** 1 · **auth** 1 · **pricing** 1 · **docs** 4 · **blog** 1 · **project** 1 · **social** 2 · **legal** 3 · **footer** 4 · **other** 22
**Primary actions (conversion path):**
- Account access — "Sign In" (login/signup) → `https://fly.io/app/sign-in`
- Primary call-to-action — "Get Started" (the conversion path) → `https://fly.io/app/sign-up`
**Signals:** 26/60 links carry a featured image · dominant link roles: content-card (23), navigation (20), footer-link (12).
---
## Extraction Completeness: 71/100 (C)
| Category | Score | Max | Detail |
|----------|-------|-----|--------|
| Colors & Palette | 25 | 25 | 18 named colors |
| Typography | 13 | 20 | 5 roles defined |
| Components | 8 | 20 | 2 specs extracted |
| Motion & Interaction | 12 | 15 | Keyframes |
| CSS Custom Properties | 3 | 10 | 66 vars |
| Responsive Breakpoints | 5 | 5 | 6 breakpoints |
| Variable Fonts | 5 | 5 | OPSZ axes |
## 12. Known Gaps & Confidence
Explicit list of what this extraction could NOT capture. Agents should not invent values for these — either skip the feature or use the documented baseline + heuristic fallback.
*Auto-detected extraction limitations — understand before building:*
- **Sparse component extraction** — fewer than 5 component types detected. Highly dynamic sections (modals, datepickers, carousels) require interaction to render and are not captured in a static pass.
- **3 parasitic shadow(s) detected** — colored box-shadows (not near-black) found in allShadows. These likely originate from browser extensions or third-party injected widgets (e.g. Grammarly, chat overlays), not from the site's own design system. Discard them when building.
| Category | What's missing | Fallback strategy |
|----------|----------------|-------------------|
| **Dark mode** | No dark-mode CSS variables or media queries detected | Light mode is canonical; do not generate dark-mode variants unless explicitly requested |
| **Form inputs** | No text input fields detected on this page | Use the documented border-radius + accent border on focus; 12-16px padding inside |
### Per-section confidence
| Section | Confidence | Reason |
|---------|------------|--------|
| §1 Visual Theme | High | Body bg extracted via getComputedStyle() |
| §2 Colors | High | 66 CSS vars (semantic naming requires ≥20 for high) |
| §3 Typography | High | 5 typography roles inferred |
| §4 Components | Low | 2 component variants captured |
| §7 Motion | High | Keyframes + transitions |
| §8 Do's/Don'ts | High | 22 rules generated; design-decisions.json has evidence per rule |
| §9 Responsive | High | 6 breakpoints detected |
| §9b Photography | High | 7 images, hero present |
## 11.1 CSS Implementation Guide (CSS Interception Engine v2.15+)
*Ready-to-use CSS from Prism's CSS Interception Engine — intercepted directly from the site's CSS files (bypasses CORS). Copy-paste into your `