App — decoded design system

app.rocketseat.com.br · dark · modern · tailwind · deep decode — measured live

App'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/app.rocketseat.com.br.

Decoded design system

App's decoded design system: background #13131B, text #000000, accent #8234E9, link #E0E0EE, primary #8234E9; type scale h1 20px / h2 18px / body 12px; 4px spacing base; 5px base radius. The single interactive/action color is #8234E9 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #8234E9 — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent, button_bg are all #8234E9 — one role, not several (the action color).
• accent #8234E9 — 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 #E0E0EE — reads as a neutral UI color, not a link accent — verify against the reference (action = #8234E9).
• secondary #2B2B3B — 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: Plus Jakarta Sans
• Body: Inter
• h1: 20px
• h2: 18px
• body: 12px

Spacing

• base unit: 4px
• scale: 2px, 4px, 8px, 10px, 12px, 16px, 20px, 24px, 32px, 40px

Radii

• base: 5px
• button: 5px

Motion

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

• durations: 150ms · 200ms · 400ms
• easings: cubic-bezier(0.4, 0, 0.2, 1) · ease-out
• animated properties: color, background-color, border-color, text-decoration-color

Native design tokens

…and 4 more measured on the page.

Button states (measured)

• primary hover: background #9956F6
• primary focus: outline 1px auto rgb(16, 16, 16)

Layout (measured)

• container max-width: 1600px
• nav: 80px
• common grid: 2 columns

Motion choreography (measured)

Load order: div.animate-pulse×15 → span.flex×8

Overlay recipe (measured)

dialog panel: rgba(0, 0, 0, 0) · radius 0px · enter 200ms linear

Input (measured)

height 46px · radius 0px · focus ring 0px auto rgb(16, 16, 16)

Responsive (measured)

• breakpoints: 640px · 768px · 1024px · 1280px · 1536px
• mobile (390px): hero 18px · nav inline

Install it

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

npx shadcn add https://mozaika.design/r/decode/app.rocketseat.com.br

Or as a Meta Astryx theme — a ready defineTheme file with the measured hover/press states baked in:

curl -o src/themes/app.theme.ts https://mozaika.design/api/astryx/decode/app.rocketseat.com.br.ts

registry item · astryx theme · or query it over MCP: get_design_system("App")

Export: DESIGN.md

# App — Design System

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

## Colors

| Role | Value |
|------|-------|
| bg | `#13131B` |
| surface | `#111119` |
| border | `#101016` |
| text | `#000000` |
| text_muted | `#07070A` |
| primary | `#8234E9` |
| accent | `#8234E9` |
| link | `#E0E0EE` |
| secondary | `#2B2B3B` |
| button_bg | `#8234E9` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#8234E9` — 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 `#8234E9` — one role, not several (your action color).
- **accent** `#8234E9` — 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** `#E0E0EE` — reads as a neutral UI color, not a link accent — verify against the reference (action = #8234E9).
- **secondary** `#2B2B3B` — 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): `#13131B` 89.6% · `#67558A` 5.6% · `#2C2641` 4.8%

## Typography

- Heading: **Plus Jakarta Sans**
- Body: **Inter**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 20px / 700 · lh 32px |
| h2 | 18px / 700 · lh 29px |
| h3 | 16px / 600 · lh 24px |
| body | 12px / 400 · lh 19px |
| small | 10px / 500 · lh 16px |

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

> **Fonts —** Plus Jakarta Sans — free, on Google. Inter — free, on Google.

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 2px, 4px, 8px, 10px, 12px, 16px, 20px, 24px, 32px, 40px — snap all gaps/padding to these
- section rhythm: 40px top/bottom padding per section (measured)

## Radius
- base: 5px
- button: 5px
- card: 5px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#8234E9` / `#FFFFFF` | none | 5px | 10px 12px 10px 12px | 600 14px | none |
| secondary | `#22222F` / `#8B8B9A` | none | 5px | 0px 8px 0px 8px | 400 14px | none |

**States (measured, not guessed)**

- primary hover: background `#9956F6`
- primary focus: outline `1px auto rgb(16, 16, 16)`
- transition: `color 0.2s cubic-bezier(0.4, 0, 0.2, 1)`

## Motion
- durations: 150ms (dominant) · 200ms · 400ms
- easings: `cubic-bezier(0.4, 0, 0.2, 1)` (dominant) · `ease-out`
- 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 |
|-------|-------|
| `--PhoneInput-color--focus` | `#03b2cb` |
| `--PhoneInputCountrySelectArrow-color--focus` | `#03b2cb` |
| `--PhoneInputCountryFlag-borderColor` | `#00000080` |
| `--PhoneInputCountryFlag-borderColor--focus` | `#03b2cb` |
| `--PhoneInputCountryFlag-backgroundColor--loading` | `#0000001a` |
| `--font-dela-gothic-one` | `"delaGothicOne", "delaGothicOne Fallback"` |
| `--font-inter` | `"Inter", "Inter Fallback"` |
| `--font-plus-jakarta-sans` | `"Plus Jakarta Sans", "Plus Jakarta Sans Fallback"` |
| `--PhoneInputCountrySelect-marginRight` | `.35em` |
| `--PhoneInputCountrySelectArrow-width` | `.3em` |
| `--PhoneInputCountrySelectArrow-marginLeft` | `.35em` |
| `--PhoneInputCountrySelectArrow-borderWidth` | `1px` |

_…and 2 more measured on the page._

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

## Layout (measured)
- container max 1600px · common grid: 2-col
- nav: 80px

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 80 | 1618 | 2 | 32 | 24/40 | 69/31 |
| 344 | 222 | 2 | — | 0/0 | 81/19 |
| 648 | 915 | 2 | 12 | 0/0 | 83/17 |

## Motion choreography (measured)
Load order: `div.animate-pulse`×15 @0ms → `span.flex`×8 @170ms
- `span.flex` ×8 — opacity 0→1 — 400ms ease-out (delay 200ms)
- overlay dialog (auto-opened): panel rgba(0, 0, 0, 0) · r 0px
  - enter: transform+opacity from translateY(5px),0 · 200ms linear | opacity from 1 · 2000ms linear

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

## Components (measured)
- input: h 46px · r 0px · bg rgba(0, 0, 0, 0) · placeholder #79798A
  - focus ring: `0px auto rgb(16, 16, 16)` — this exact construction, don't invent your own
- link: #E0E0EE · no underline

## Responsive (measured)
- breakpoints: 640px · 768px · 1024px · 1280px · 1536px
- mobile (390px): hero 18px · 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/decode/app.rocketseat.com.br

← All decoded design systems

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