Co-Star — decoded design system

costarastrology.com · light · modern · custom · deep decode — measured live

Co-Star'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.

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/decode/costarastrology.com.

Decoded design system

Co-Star's decoded design system: background #F7F7F7, text #333333, accent #141414, link #337AB7, primary #D0021B; type scale h1 40px / h2 24px / body 23px; 10px spacing base; 4px base radius. The single interactive/action color is #141414 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #141414 — the single interactive color; only on things you click or must notice, never large fills.
• accent, button_bg are all #141414 — one role, not several (the action color).
• accent #141414 — 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 #D0021B — a brand color — but the call-to-action uses #141414, not this.
• link #337AB7 — inline text links and link-styled controls.
• secondary #F6D8D8 — 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: Romana Book
• Body: Akkurat Mono
• Mono: Akkurat-Mono
• h1: 40px
• h2: 24px
• body: 23px

Spacing

• base unit: 10px
• scale: 10px, 15px, 16px, 20px, 23px, 30px, 40px, 50px, 54px, 60px

Radii

• base: 4px
• button: 0px

Native design tokens

…and 1 more measured on the page.

Button states (measured)

• primary focus: outline 5px auto rgb(16, 16, 16)

Layout (measured)

• nav: 40px fixed

Responsive (measured)

• breakpoints: 353px · 480px · 656px · 768px · 980px · 992px
• mobile (390px): hero 40px · nav hamburger

Install it

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

npx shadcn add mozaika.design/r/decode/costarastrology.com

registry item · or query it over MCP: get_design_system("Co-Star")

Export: DESIGN.md

# Co-Star — Design System

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

## Colors

| Role | Value |
|------|-------|
| bg | `#F7F7F7` |
| surface | `#EBEBEB` |
| border | `#D9D9D9` |
| text | `#333333` |
| text_muted | `#7D7D7D` |
| primary | `#D0021B` |
| accent | `#141414` |
| link | `#337AB7` |
| secondary | `#F6D8D8` |
| button_bg | `#141414` |
| button_text | `#FBFBFB` |

**Using these colors**

- **Action color** `#141414` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `accent`, `button_bg` are all `#141414` — one role, not several (your action color).
- **accent** `#141414` — 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** `#D0021B` — a brand color — but the call-to-action uses #141414, not this.
- **link** `#337AB7` — inline text links and link-styled controls.
- **secondary** `#F6D8D8` — 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): `#F7F7F7` 90.6% · `#DADAD9` 5.2% · `#5E5D5C` 4.3%

## Typography

- Heading: **Romana Book** _(free fallback: Newsreader)_
- Body: **Akkurat Mono** _(free fallback: JetBrains Mono)_
- Mono: **Akkurat-Mono** _(measured)_

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 40px / 400 · lh 40px |
| body | 23px / 400 · lh 26px |
| small | 16px / 400 · lh 30px |

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

> **Fonts —** Romana Book may be proprietary — safe free fallback: Newsreader (Google Fonts). Akkurat Mono may be proprietary — safe free fallback: JetBrains Mono (Google Fonts).

## Spacing
- base unit: 10px (inferred from the measured scale)
- measured scale: 10px, 15px, 16px, 20px, 23px, 30px, 40px, 50px, 54px, 60px — snap all gaps/padding to these

## Radius
- base: 4px
- button: 0px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#141414` / `#FBFBFB` | 1px solid rgb(37, 37, 37) | 0px | 10px 0px 10px 0px | 400 12px | none |
| secondary | `#FBFBFB` / `#252525` | 1px solid rgb(37, 37, 37) | 0px | 10px 0px 10px 0px | 400 12px | none |

**States (measured, not guessed)**

- primary focus: outline `5px auto rgb(16, 16, 16)`

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--PhoneInput-color--focus` | `#03b2cb` |
| `--PhoneInputCountrySelectArrow-color--focus` | `#03b2cb` |
| `--PhoneInputCountryFlag-borderColor` | `rgba(0,0,0,0.5)` |
| `--PhoneInputCountryFlag-borderColor--focus` | `#03b2cb` |
| `--PhoneInputCountryFlag-backgroundColor--loading` | `rgba(0,0,0,0.1)` |
| `--PhoneInputCountrySelect-marginRight` | `0.35em` |
| `--PhoneInputCountrySelectArrow-width` | `0.3em` |
| `--PhoneInputCountrySelectArrow-marginLeft` | `0.35em` |
| `--PhoneInputCountrySelectArrow-borderWidth` | `1px` |
| `--PhoneInputCountryFlag-height` | `1em` |
| `--PhoneInputCountryFlag-borderWidth` | `1px` |

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

## Layout (measured)
- nav: 40px fixed

## Responsive (measured)
- breakpoints: 353px · 480px · 656px · 768px · 980px · 992px
- mobile (390px): hero 40px · 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.

← All decoded design systems

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