MozaikaDesign system

CodeSandbox — Design System

dark · modern · high · custom · confidence 90% · deep decode

CodeSandbox compiles its pitch in TWK Everett at 120px/500 on studio black #0E0E0E, Inter at 18-28px for the reading, and acid lime #EAFF96 buttons at a sharp 4px radius. Editor frames and template grids provide the interface texture — cloud development presented with the outsized, confident type of a tool that boots faster than your laptop.

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/codesandbox.

Tokens

CodeSandbox's decoded design system: background #0E0E0E, text #ECECEE, accent #EAFF96, link #DCFF50, primary #EAFF96; type scale h1 120px / h2 24px / body 18px; 8px spacing base; 4px base radius. The single interactive/action color is #EAFF96 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#0E0E0E
surface#1B1B1B
border#2F2F2F
text#ECECEE
text_muted#979798
primary#EAFF96
accent#EAFF96
link#DCFF50
button_bg#EAFF96
button_text#343434

Using these colors

Typography

Spacing

Radii

Shadows (elevation)

Motion

Micro-interactions run at 150ms (dominant) with ease.

Native design tokens

TokenValue
--cc-link-color#30363c
--cc-bg#fff
--cc-primary-color#2c2f31
--cc-secondary-color#5e6266
--cc-btn-primary-bg#30363c
--cc-btn-primary-color#fff
--cc-btn-primary-border-color#30363c
--cc-btn-primary-hover-bg#000
--cc-btn-primary-hover-color#fff
--cc-btn-primary-hover-border-color#000

…and 110 more measured on the page.

Button states (measured)

Layout (measured)

Motion choreography (measured)

Load order: div.cm--box → div.cm--box → div.cm--box → div.rfm-marquee×12 → span.c-PJLV×24 → span.c-PJLV×24

Overlay recipe (measured)

dialog panel: #333333 · radius 5px

Responsive (measured)

Per-section tokens (9)

Export: DESIGN.md

# CodeSandbox — Design System

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

CodeSandbox compiles its pitch in TWK Everett at 120px/500 on studio black #0E0E0E, Inter at 18-28px for the reading, and acid lime #EAFF96 buttons at a sharp 4px radius. Editor frames and template grids provide the interface texture — cloud development presented with the outsized, confident type of a tool that boots faster than your laptop.

## Colors

| Role | Value |
|------|-------|
| bg | `#0E0E0E` |
| surface | `#1B1B1B` |
| border | `#2F2F2F` |
| text | `#ECECEE` |
| text_muted | `#979798` |
| primary | `#EAFF96` |
| accent | `#EAFF96` |
| link | `#DCFF50` |
| button_bg | `#EAFF96` |
| button_text | `#343434` |

**Using these colors**

- **Action color** `#EAFF96` — 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 `#EAFF96` — one role, not several (your action color).
- **accent** `#EAFF96` — 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** `#DCFF50` — inline text links and link-styled controls.
- **Page coverage** (full-page screenshot pixels): `#161616` 68.3% · `#F4FFC2` 10.2% · `#2E2E2E` 9% · `#D9EB92` 7.7%

## Typography

- Heading: **Inter**
- Body: **Inter**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 96px / 500 · lh 96px · tracking -4.8px |
| h2 | 88px / 500 · lh 88px · tracking -4.4px |
| h3 | 56px / 500 · lh 56px · tracking -2.8px |
| body | 18px / 400 · lh 25px · tracking -0.45px |
| small | 17px / 600 · lh 19px |

- Weight ladder: 200 · 400 · 500 · 600 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Inter — free, on Google.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 4px, 7px, 8px, 10px, 12px, 13px, 16px, 24px, 32px, 48px — snap all gaps/padding to these
- section rhythm: 128px top/bottom padding per section (measured)

## Radius
- base: 4px
- button: 6px
- card: 10px
- pill: 9999px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#EAFF96` / `#343434` | none | 4px | 8px 12px 8px 12px | 500 12px | none |
| secondary | `#333333` / `#E5E5E5` | 1px solid rgb(82, 82, 82) | 4px | 6.56px 23.616px 6.56px 23.616px | 600 13.12px | none |

**States (measured, not guessed)**

- primary hover: background `#F5FFCB`
- primary focus: outline `2px solid rgb(176, 160, 255)`
- secondary hover: background `rgba(255, 255, 255, 0.1)`
- transition: `background-color 0.3s ease`

## Shadows (elevation)
- card: `rgba(0, 0, 2, 0.3) 0px 10px 30px 0px`

## Motion
- durations: 150ms (dominant) · 1000ms · 2000ms
- easings: `ease` (dominant) · `ease-in-out`
- animated properties: opacity, color, background-color, border-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 |
|-------|-------|
| `--cc-link-color` | `#30363c` |
| `--cc-bg` | `#fff` |
| `--cc-primary-color` | `#2c2f31` |
| `--cc-secondary-color` | `#5e6266` |
| `--cc-btn-primary-bg` | `#30363c` |
| `--cc-btn-primary-color` | `#fff` |
| `--cc-btn-primary-border-color` | `#30363c` |
| `--cc-btn-primary-hover-bg` | `#000` |
| `--cc-btn-primary-hover-color` | `#fff` |
| `--cc-btn-primary-hover-border-color` | `#000` |
| `--cc-btn-secondary-bg` | `#eaeff2` |
| `--cc-btn-secondary-color` | `#2c2f31` |

_…and 108 more measured on the page._

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

## Layout (measured)
- container max 1200px · common grid: 4-col
- nav: 48px relative

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 901 | 1130 | 6 | — | 128/128 | — |
| 2031 | 820 | 4 | — | 128/128 | — |
| 4144 | 248 | 4 | — | 0/0 | — |
| 4392 | 769 | — | — | 80/0 | — |

## Motion choreography (measured)
Load order: `div.cm--box` @0ms → `div.cm--box` @0ms → `div.cm--box` @0ms → `div.rfm-marquee`×12 @79ms → `span.c-PJLV`×24 @210ms → `span.c-PJLV`×24 @210ms
- overlay dialog (auto-opened): panel #333333 · r 5px · shadow rgba(0, 0, 2, 0.3) 0px 10px 30px 0px

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

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

## Responsive (measured)
- breakpoints: 420px · 640px · 734px · 1068px · 1441px
- mobile (390px): hero 48px · 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/codesandbox

Export: Tailwind v4 (@theme)

@theme {
  /* action color #EAFF96 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #0E0E0E;
  --color-surface: #1B1B1B;
  --color-border: #2F2F2F;
  --color-text: #ECECEE;
  --color-text-muted: #979798;
  --color-primary: #EAFF96;  /* primary brand / action color. */
  --color-accent: #EAFF96;  /* 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: #DCFF50;  /* inline text links and link-styled controls. */
  --color-button-bg: #EAFF96;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #343434;
  /* fonts: Inter — free, on Google. */
  --font-heading: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  /* measured weights: 200, 400, 500, 600 — use these, not 400/600 */
  --text-hero: 96px; --font-weight-hero: 500; --leading-hero: 96px; --tracking-hero: -4.8px;
  --text-h2: 88px; --font-weight-h2: 500; --leading-h2: 88px; --tracking-h2: -4.4px;
  --text-h3: 56px; --font-weight-h3: 500; --leading-h3: 56px; --tracking-h3: -2.8px;
  --text-body: 18px; --font-weight-body: 400; --leading-body: 25px; --tracking-body: -0.45px;
  --text-small: 17px; --font-weight-small: 600; --leading-small: 19px;
  --radius-base: 4px;
  --radius-button: 6px;
  --radius-card: 10px;
  --radius-pill: 9999px;
  --shadow-card: rgba(0, 0, 2, 0.3) 0px 10px 30px 0px;
  --color-btn-hover: #F5FFCB;  /* measured primary hover fill */
  --outline-focus: 2px solid rgb(176, 160, 255);  /* measured focus ring */
  --ease-brand: ease;
  --duration-fast: 150ms;  /* use: duration-[var(--duration-fast)] */
  --duration-base: 1000ms;
  --duration-slow: 2000ms;
  --section-y: 128px;  /* per-section vertical padding (measured) */
  --spacing: 8px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 4, 7, 8, 10, 12, 13, 16, 24, 32, 48px */
}

Export: CSS variables

:root {
  /* action color #EAFF96 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #0E0E0E;
  --surface: #1B1B1B;
  --border: #2F2F2F;
  --text: #ECECEE;
  --text-muted: #979798;
  --primary: #EAFF96;  /* primary brand / action color. */
  --accent: #EAFF96;  /* 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: #DCFF50;  /* inline text links and link-styled controls. */
  --button-bg: #EAFF96;  /* primary-button fill — the main call-to-action color. */
  --button-text: #343434;
  --font-heading: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --text-hero: 96px; --weight-hero: 500; --leading-hero: 96px; --tracking-hero: -4.8px;
  --text-h2: 88px; --weight-h2: 500; --leading-h2: 88px; --tracking-h2: -4.4px;
  --text-h3: 56px; --weight-h3: 500; --leading-h3: 56px; --tracking-h3: -2.8px;
  --text-body: 18px; --weight-body: 400; --leading-body: 25px; --tracking-body: -0.45px;
  --text-small: 17px; --weight-small: 600; --leading-small: 19px;
  --radius: 4px;
  --radius-button: 6px;
  --radius-card: 10px;
  --radius-pill: 9999px;
  --shadow-card: rgba(0, 0, 2, 0.3) 0px 10px 30px 0px;
  --btn-bg-hover: #F5FFCB;
  --focus-ring: 2px solid rgb(176, 160, 255);
  --ease: ease;
  --duration-fast: 150ms;
  --duration-base: 1000ms;
  --duration-slow: 2000ms;
  --section-y: 128px;
}

/* their own tokens, verbatim from the site's :root */
:root {
  --cc-link-color: #30363c;
  --cc-bg: #fff;
  --cc-primary-color: #2c2f31;
  --cc-secondary-color: #5e6266;
  --cc-btn-primary-bg: #30363c;
  --cc-btn-primary-color: #fff;
  --cc-btn-primary-border-color: #30363c;
  --cc-btn-primary-hover-bg: #000;
  --cc-btn-primary-hover-color: #fff;
  --cc-btn-primary-hover-border-color: #000;
  --cc-btn-secondary-bg: #eaeff2;
  --cc-btn-secondary-color: #2c2f31;
}
/* fonts: Inter — free, on Google. */