Fathom — decoded design system

fathom.video · dark · modern · custom · deep decode — measured live

Fathom's design system, decoded live by Mozaika: measured color roles, type scale, buttons with real hover/focus states, motion and the brand's own tokens.

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

Decoded design system

Fathom's decoded design system: background #000000, text #FAF5F5, accent #00BEFF, link #000000, primary #00BEFF; type scale h1 112px / h2 57px / body 17px; 8px spacing base; 20px base radius. The single interactive/action color is #00BEFF — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #00BEFF — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent, button_bg are all #00BEFF — one role, not several (the action color).
• accent #00BEFF — 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 #000000 — fails contrast on the background (~1.0:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
• secondary #FFF58C — 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.

Typography

• Heading: Ttroundsneuecond Md
• Body: Sora
• h1: 112px
• h2: 57px
• body: 17px

Spacing

• base unit: 8px
• scale: 3px, 5px, 8px, 9px, 10px, 14px, 16px, 20px, 24px, 32px

Radii

• base: 20px
• button: 56px

Shadows (elevation)

• card: rgba(172, 171, 171, 0.3) 0px -1px 10px 0px

Motion

Micro-interactions run at 300ms (dominant) with ease.

• durations: 300ms · 2000ms · 200ms
• easings: ease · cubic-bezier(0.2, 0.8, 0.2, 1)
• animated properties: color, transform, opacity, max-height

Native design tokens

Button states (measured)

• primary focus: outline 1px auto rgb(16, 16, 16)

Layout (measured)

• container max-width: 1020px
• nav: 89px relative
• common grid: 3 columns

Motion choreography (measured)

Load order: div.padding-global → div.padding-global → div.padding-global → div.accordion2_component

Scroll reveal: 3 elements rest at opacity 0, animate in over 1000ms.

Overlay recipe (measured)

dialog panel: #121212 · radius 6px

Responsive (measured)

• breakpoints: 352px · 425px · 440px · 479px · 576px · 768px
• mobile (390px): hero 57px · nav hamburger

Install it

Drop this measured system into any shadcn/Tailwind project in one command:

npx shadcn add mozaika.design/r/decode/fathom.video

registry item · or query it over MCP: get_design_system("Fathom")

Export: DESIGN.md

# Fathom — Design System

> dark, modern, high, custom — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#000000` |
| surface | `#0F0E0E` |
| border | `#252424` |
| text | `#FAF5F5` |
| text_muted | `#9B9797` |
| primary | `#00BEFF` |
| accent | `#00BEFF` |
| link | `#000000` |
| secondary | `#FFF58C` |
| button_bg | `#00BEFF` |
| button_text | `#000000` |

**Using these colors**

- **Action color** `#00BEFF` — 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`, `button_bg` are all `#00BEFF` — one role, not several (your action color).
- **accent** `#00BEFF` — 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** `#000000` — fails contrast on the background (~1.0:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
- **secondary** `#FFF58C` — 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): `#000000` 70.4% · `#121212` 9.8% · `#292B2B` 6.3% · `#AEBCD2` 4.6%

## Typography

- Heading: **Ttroundsneuecond Md** _(free fallback: Newsreader)_
- Body: **Sora**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 112px / 300 · lh 134px · tracking -0.36px |
| h2 | 57px / 300 · lh 62px · tracking -1.92px |
| h3 | 43px / 300 · lh 52px · tracking -1.44px |
| body | 17px / 300 · lh 21px · tracking -0.36px |
| small | 15px / 300 · lh 15px |

- Weight ladder: 300 · 400 · 500 · 700 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Ttroundsneuecond Md may be proprietary — safe free fallback: Newsreader (Google Fonts). Sora — free, on Google.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 3px, 5px, 8px, 9px, 10px, 14px, 16px, 20px, 24px, 32px — snap all gaps/padding to these
- section rhythm: 64px top/bottom padding per section (measured)

## Radius
- base: 20px
- button: 56px
- card: 56px
- pill: 9999px
- sharp: 2px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#00BEFF` / `#000000` | none | 56px | 16px 32px 16px 32px | 400 17.4px / 0.18px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#00BEFF` | none | 56px | 13.6px 32px 13.6px 32px | 400 17.4px / 0.18px | none |

**States (measured, not guessed)**

- primary focus: outline `1px auto rgb(16, 16, 16)`
- secondary hover: color `#FFF58C`

## Shadows (elevation)
- card: `rgba(172, 171, 171, 0.3) 0px -1px 10px 0px`

## Motion
- durations: 300ms (dominant) · 2000ms · 200ms
- easings: `ease` (dominant) · `cubic-bezier(0.2, 0.8, 0.2, 1)`
- animated properties: color, transform, opacity, max-height

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 |
|-------|-------|
| `--link-color--link-primary` | `#00beff` |
| `--base-color-brand--purple` | `#9600ff` |
| `--base-color-brand--pink` | `#ffa8bb` |
| `--base-color-brand--yellow` | `#fff58c` |
| `--base-color-brand--cyan` | `#00beff` |
| `--background-color--background-secondary` | `#00beff` |
| `--background-color--background-tertiary` | `#ffa8bb` |
| `--base-color-brand--orange` | `#f55200` |
| `--base-color-brand--offwhite` | `#faf5f5` |
| `--base-color-brand--off-black` | `#191919` |

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

## Layout (measured)
- container max 1020px · common grid: 3-col
- nav: 89px relative

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 181 | 840 | — | — | 0/0 | — |
| 1574 | 246 | 3 | — | 48/0 | — |
| 1820 | 863 | — | — | 0/0 | — |
| 2684 | 2330 | — | — | 0/0 | — |

## Motion choreography (measured)
Load order: `div.padding-global` @0ms → `div.padding-global` @0ms → `div.padding-global` @0ms → `div.accordion2_component` @0ms
- scroll reveal: 3 elements rest at opacity 0, animate in over 1000ms (2 revealed during the drive).
- overlay dialog (auto-opened): panel #121212 · r 6px

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

## Components (measured)
- link: #000000 · no underline
- disabled: bg rgba(0, 0, 0, 0) · text #FFF58C

## Responsive (measured)
- breakpoints: 352px · 425px · 440px · 479px · 576px · 768px
- mobile (390px): hero 57px · 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.

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An automated reading of Fathom's publicly-visible CSS (colors, fonts, spacing, motion) — not affiliated with fathom.video. No screenshots stored. Removal requests: hello@mozaika.design.