MozaikaDesign system

Bilt — Design System

dark · modern · medium · custom · confidence 92% · deep decode

The full decoded design system for Bilt: color roles, type scale, spacing, radii and paste-ready DESIGN.md / Tailwind / CSS exports.

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/bilt.

Tokens

Bilt's decoded design system: background #010A13, text #CCCED0, accent #97C6EA, link #010A13, primary #97C6EA; type scale h1 24px / h2 32px / body 11.2px; 8px spacing base; 0px base radius. The single interactive/action color is #97C6EA — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#010A13
surface#0D151E
border#1F272F
text#CCCED0
text_muted#7E8388
primary#97C6EA
accent#97C6EA
link#010A13
secondary#CCCED0
button_bg#97C6EA
button_text#0000EE

Using these colors

Typography

Spacing

Radii

Shadows (elevation)

Motion

Micro-interactions run at 200ms (dominant) with cubic-bezier(0, 0, 1, 1).

Button states (measured)

Motion choreography (measured)

Scroll reveal: 9 elements rest at opacity 0, translateY(24px), animate in over 400ms.

Responsive (measured)

Per-section tokens (10)

Export: DESIGN.md

# Bilt — Design System

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

## Colors

| Role | Value |
|------|-------|
| bg | `#010A13` |
| surface | `#0D151E` |
| border | `#1F272F` |
| text | `#CCCED0` |
| text_muted | `#7E8388` |
| primary | `#97C6EA` |
| accent | `#97C6EA` |
| link | `#010A13` |
| secondary | `#CCCED0` |
| button_bg | `#97C6EA` |
| button_text | `#0000EE` |

**Using these colors**

- **Action color** `#97C6EA` — 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 `#97C6EA` — one role, not several (your action color).
- **accent** `#97C6EA` — 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** `#010A13` — 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** `#CCCED0` — 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): `#091119` 94% · `#282F33` 6%

## Typography

- Heading: **GT America Medium** _(free fallback: Newsreader)_
- Body: **GT America VF Variable** _(free fallback: Inter)_
- Mono: **GT America Mono VF Variable**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 48px / 400 · lh 55px · tracking -1.44px |
| h2 | 32px / 400 · lh 38px · tracking -0.96px |
| h3 | 24px / 400 · lh 31px · tracking -0.24px |
| body | 16px / 400 · lh 21px · tracking -0.16px |
| small | 14px / 400 · lh 20px |

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

> **Fonts —** GT America Medium may be proprietary — safe free fallback: Newsreader (Google Fonts). GT America VF Variable is proprietary — closest free match: Inter (Google). Load Inter; keep GT America VF Variable first so licensed users still get it.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 4px, 6px, 8px, 10px, 12px, 14px, 16px, 20px, 24px, 28px — snap all gaps/padding to these

## Radius
- base: 0px
- button: 8px
- card: 12px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#97C6EA` / `#0000EE` | none | 6px | 6px 12px 6px 12px | 400 12px | none |
| secondary | `#030C15` / `#0000EE` | none | 6px | — | — | none |

**States (measured, not guessed)**

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

## Shadows (elevation)
- subtle: `rgba(0, 0, 0, 0.16) 0px 0.602187px 0.602187px -0.583333px, rgba(0, 0, 0, 0.18) 0px 2.28853px 2.28853px -1.16667px, rgba(0, 0, 0, 0.28) 0px 10px 10px -1.75px`
- card: `rgba(0, 0, 0, 0.13) 0px 0.662406px 1.72226px -0.833333px, rgba(0, 0, 0, 0.13) 0px 2.51739px 6.54521px -1.66667px, rgba(0, 0, 0, 0.13) 0px 11px 28.6px -2.5px`
- overlay: `rgba(0, 0, 0, 0.2) 0px 40px 80px -40px`

## Motion
- durations: 200ms (dominant)
- easings: `cubic-bezier(0, 0, 1, 1)` (dominant)
- animated properties: color, text-decoration-color, text-decoration-thickness, text-underline-offset

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Motion choreography (measured)
- scroll reveal: 9 elements rest at opacity 0, translateY(24px), animate in over 400ms (8 revealed during the drive).

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

## Responsive (measured)
- breakpoints: 809px · 1200px · 1439px
- mobile (390px): hero 20px · body 12px · 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/bilt

Export: Tailwind v4 (@theme)

@theme {
  /* action color #97C6EA — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #010A13;
  --color-surface: #0D151E;
  --color-border: #1F272F;
  --color-text: #CCCED0;
  --color-text-muted: #7E8388;
  --color-primary: #97C6EA;  /* primary brand / action color. */
  --color-accent: #97C6EA;  /* 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: #010A13;  /* 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). */
  --color-secondary: #CCCED0;  /* 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. */
  --color-button-bg: #97C6EA;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #0000EE;
  /* fonts: GT America Medium may be proprietary — safe free fallback: Newsreader (Google Fonts). GT America VF Variable is proprietary — closest free match: Inter (Google). Load Inter; keep GT America VF Variable first so licensed users still get it. */
  --font-heading: "GT America Medium", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "GT America VF Variable", "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "GT America Mono VF Variable", ui-monospace, monospace;
  /* measured weights: 400, 500 — use these, not 400/600 */
  --text-hero: 48px; --font-weight-hero: 400; --leading-hero: 55px; --tracking-hero: -1.44px;
  --text-h2: 32px; --font-weight-h2: 400; --leading-h2: 38px; --tracking-h2: -0.96px;
  --text-h3: 24px; --font-weight-h3: 400; --leading-h3: 31px; --tracking-h3: -0.24px;
  --text-body: 16px; --font-weight-body: 400; --leading-body: 21px; --tracking-body: -0.16px;
  --text-small: 14px; --font-weight-small: 400; --leading-small: 20px;
  --radius-base: 0px;
  --radius-button: 8px;
  --radius-card: 12px;
  --shadow-card: rgba(0, 0, 0, 0.13) 0px 0.662406px 1.72226px -0.833333px, rgba(0, 0, 0, 0.13) 0px 2.51739px 6.54521px -1.66667px, rgba(0, 0, 0, 0.13) 0px 11px 28.6px -2.5px;
  --shadow-overlay: rgba(0, 0, 0, 0.2) 0px 40px 80px -40px;
  --shadow-subtle: rgba(0, 0, 0, 0.16) 0px 0.602187px 0.602187px -0.583333px, rgba(0, 0, 0, 0.18) 0px 2.28853px 2.28853px -1.16667px, rgba(0, 0, 0, 0.28) 0px 10px 10px -1.75px;
  --outline-focus: 1px auto rgb(16, 16, 16);  /* measured focus ring */
  --ease-brand: cubic-bezier(0, 0, 1, 1);
  --duration-fast: 200ms;  /* use: duration-[var(--duration-fast)] */
  --spacing: 8px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 4, 6, 8, 10, 12, 14, 16, 20, 24, 28px */
}

Export: CSS variables

:root {
  /* action color #97C6EA — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #010A13;
  --surface: #0D151E;
  --border: #1F272F;
  --text: #CCCED0;
  --text-muted: #7E8388;
  --primary: #97C6EA;  /* primary brand / action color. */
  --accent: #97C6EA;  /* 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: #010A13;  /* 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: #CCCED0;  /* 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. */
  --button-bg: #97C6EA;  /* primary-button fill — the main call-to-action color. */
  --button-text: #0000EE;
  --font-heading: "GT America Medium", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "GT America VF Variable", "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "GT America Mono VF Variable", ui-monospace, monospace;
  --text-hero: 48px; --weight-hero: 400; --leading-hero: 55px; --tracking-hero: -1.44px;
  --text-h2: 32px; --weight-h2: 400; --leading-h2: 38px; --tracking-h2: -0.96px;
  --text-h3: 24px; --weight-h3: 400; --leading-h3: 31px; --tracking-h3: -0.24px;
  --text-body: 16px; --weight-body: 400; --leading-body: 21px; --tracking-body: -0.16px;
  --text-small: 14px; --weight-small: 400; --leading-small: 20px;
  --radius: 0px;
  --radius-button: 8px;
  --radius-card: 12px;
  --shadow-card: rgba(0, 0, 0, 0.13) 0px 0.662406px 1.72226px -0.833333px, rgba(0, 0, 0, 0.13) 0px 2.51739px 6.54521px -1.66667px, rgba(0, 0, 0, 0.13) 0px 11px 28.6px -2.5px;
  --shadow-overlay: rgba(0, 0, 0, 0.2) 0px 40px 80px -40px;
  --shadow-subtle: rgba(0, 0, 0, 0.16) 0px 0.602187px 0.602187px -0.583333px, rgba(0, 0, 0, 0.18) 0px 2.28853px 2.28853px -1.16667px, rgba(0, 0, 0, 0.28) 0px 10px 10px -1.75px;
  --focus-ring: 1px auto rgb(16, 16, 16);
  --ease: cubic-bezier(0, 0, 1, 1);
  --duration-fast: 200ms;
}
/* fonts: GT America Medium may be proprietary — safe free fallback: Newsreader (Google Fonts). GT America VF Variable is proprietary — closest free match: Inter (Google). Load Inter; keep GT America VF Variable first so licensed users still get it. */