GOV.UK Design System

---
version: "alpha"
name: "GOV.UK Design System"
description: "GOV.UK Design System visual system, translated from the Claude Artisan catalog for use in digital products. Radically clear, task-focused, accessible; Transport/GDS typeface, black on white"
colors:
  primary: "#00703c"
  background: "#ffffff"
  surface: "#f3f2f1"
  text: "#0b0c0c"
  accent: "#1d70b8"
  on-primary: "#FFFFFF"
  on-surface: "#000000"
  on-accent: "#FFFFFF"
typography:
  h1:
    fontFamily: "'GDS Transport', 'Helvetica Neue', Arial, sans-serif"
    fontSize: "4rem"
    fontWeight: "700"
    lineHeight: "1.05"
  body-md:
    fontFamily: "'GDS Transport', 'Helvetica Neue', Arial, sans-serif"
    fontSize: "1rem"
    fontWeight: "400"
    lineHeight: "1.6"
  label-caps:
    fontFamily: "'GDS Transport', 'Helvetica Neue', Arial, sans-serif"
    fontSize: "0.75rem"
    fontWeight: "600"
    letterSpacing: "0.06em"
rounded:
  sm: "0px"
  md: "0px"
  lg: "0px"
spacing:
  sm: "10px"
  md: "20px"
  lg: "40px"
components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "{colors.on-primary}"
    rounded: "{rounded.md}"
    padding: "20px"
  button-secondary:
    backgroundColor: "{colors.accent}"
    textColor: "{colors.on-accent}"
    rounded: "{rounded.md}"
    padding: "20px"
  card:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.on-surface}"
    rounded: "{rounded.lg}"
    padding: "30px"
  page:
    backgroundColor: "{colors.background}"
    textColor: "{colors.text}"
    padding: "20px"
---
## Overview

GOV.UK Design System visual system, translated from the Claude Artisan catalog for use in digital products. Radically clear, task-focused, accessible; Transport/GDS typeface, black on white

- **Category:** flat-platform
- **Era:** 2012–present
- **Origin:** UK Government Digital Service.
- **Reference:** gov.uk.
- **Structural base:** hero, superfície, conteúdo e grade responsiva

**Defining traits:**
- Radically clear, task-focused, accessible
- Transport/GDS typeface, black on white
- No decoration; content and usability only
- Rigorous WCAG compliance

## Colors

- **bg** — #ffffff
- **surface** — #f3f2f1
- **surface-strong** — #ebeae9
- **border** — #0b0c0c
- **text** — #0b0c0c
- **text-muted** — #505a5f
- **primary** — #00703c
- **accent** — #1d70b8
- **focus** — #ffdd00
- **error** — #d4351c

## Typography

- Display: 'GDS Transport', 'Helvetica Neue', Arial, sans-serif
- Body: 'GDS Transport', 'Helvetica Neue', Arial, sans-serif
- Mono: 'GDS Transport Mono', ui-monospace, monospace

## Layout

- hero, superfície, conteúdo e grade responsiva
- Use a responsive grid and preserve content hierarchy.
- Collapse columns below 768px without horizontal overflow.

## Elevation & Depth

- Radically clear, task-focused, accessible; Transport/GDS typeface, black on white; No decoration; content and usability only; Rigorous WCAG compliance; sombras e elevação

## Shapes

- Radius scale: 0px, 0px, 0px.

## Components

- Buttons keep visible focus and predictable hover/pressed states.
- Cards use the surface and radius scale from the tokens.
- Forms expose persistent labels, textual errors, and keyboard focus.

## Do's and Don'ts

- Do: follow the tokens and the structural composition.
- Do: maintain WCAG AA contrast and `prefers-reduced-motion`.
- Avoid: using the style as decoration without functional hierarchy.

Act as a Senior Frontend Engineer and Expert UI Designer.
Your task is to code a complete Landing Page on the first attempt.
- Landing Page Theme: <INSERT THEME>
- Sections to add: <INSERT SECTIONS>

Generate the final code immediately following these definitions:

## Style

- **Name:** GOV.UK Design System
- **Type:** claude-artisan/flat-platform
- **Keywords:** GOV.UK Design System, GDS, GOV.UK, Radically clear, task-focused, accessible, Transport/GDS typeface, black on white, No decoration; content and usability only, Rigorous WCAG compliance, flat-platform
- **Era:** 2012–present
- **Light/Dark:** Fonte não declara modos; validar em light e dark antes de publicar

## Color Palette

- **Primary:** bg: #ffffff, surface: #f3f2f1, surface-strong: #ebeae9, border: #0b0c0c
- **Secondary:** text: #0b0c0c, text-muted: #505a5f, primary: #00703c, accent: #1d70b8, focus: #ffdd00, error: #d4351c

## Visual Effects

Radically clear, task-focused, accessible, Transport/GDS typeface, black on white, No decoration; content and usability only, Rigorous WCAG compliance, shadow

## AI Visual Direction

GOV.UK Design System, Radically clear, task-focused, accessible, Transport/GDS typeface, black on white, No decoration; content and usability only, Rigorous WCAG compliance, gov.uk.

## CSS Technical

```css
/* GOV.UK Design System — design tokens */
/* 2012–present | UK Government Digital Service, condensed */
:root {
  /* color */
  --color-bg: #ffffff;
  --color-surface: #f3f2f1;
  --color-surface-strong: #ebeae9;
  --color-border: #0b0c0c;
  --color-text: #0b0c0c;
  --color-text-muted: #505a5f;
  --color-primary: #00703c;
  --color-accent: #1d70b8;
  --color-focus: #ffdd00;
  --color-error: #d4351c;
  /* radius: GDS is deliberately square, no rounding */
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-pill: 0px;
  /* shadow: GDS avoids drop shadows; uses a hard 2px bottom offset instead */
  --shadow-sm: 0 2px 0 #002d18;
  --shadow-md: 0 2px 0 #002d18;
  --shadow-lg: 0 2px 0 #002d18;
  /* font */
  --font-sans: 'GDS Transport', 'Helvetica Neue', Arial, sans-serif;
  --font-display: 'GDS Transport', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'GDS Transport Mono', ui-monospace, monospace;
  /* text */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1.1875rem;
  --text-lg: 1.375rem;
  --text-xl: 1.75rem;
  --text-2xl: 2rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3rem;
  --text-5xl: 3.75rem;
  /* space */
  --space-1: 5px;
  --space-2: 10px;
  --space-3: 15px;
  --space-4: 20px;
  --space-6: 30px;
  --space-8: 40px;
  --space-12: 50px;
  --space-16: 60px;
  --space-24: 80px;
  /* ease */
  --ease-standard: ease-in-out;
  /* extra: the signature move is the 3px solid yellow focus state with a
     black inset, mandated across every interactive control */
  --focus-ring: 3px solid var(--color-focus);
  --focus-shadow: 0 0 0 3px #0b0c0c;
}

/* ============================================================
   Base component classes — GOV.UK Design System
   Signature move: the yellow-on-black focus state (a thick yellow outline
   with a black inset shadow) appears identically on every interactive
   element — buttons, inputs, links — nothing else competes for attention.
   ============================================================ */
body { margin: 0; color: var(--color-text); font-family: var(--font-sans); background: var(--color-bg); line-height: 1.4; }
.nav { display: flex; gap: var(--space-4); align-items: center; padding: var(--space-3) var(--space-6);
  background: #0b0c0c; color: #fff; border-bottom: 10px solid var(--color-accent); }
.nav a { color: #fff; }
.btn { font: 400 var(--text-base)/1.19 var(--font-sans); color: #fff;
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-md);
  background: #00703c; border: 2px solid transparent; box-shadow: var(--shadow-sm);
  cursor: pointer; transition: box-shadow .1s var(--ease-standard); }
.btn:hover { background: #005a30; }
.btn:active { box-shadow: none; transform: translateY(2px); }
.btn:focus-visible { outline: var(--focus-ring); outline-offset: 0; box-shadow: var(--focus-shadow); color: var(--color-text); background: var(--color-focus); }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn--primary { background: var(--color-primary); }
.card { background: var(--color-bg); border-left: 5px solid var(--color-accent);
  border-radius: var(--radius-lg); padding: var(--space-4) var(--space-6); }
.input { width: 100%; box-sizing: border-box; color: var(--color-text); font: var(--text-base) var(--font-sans);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm);
  background: var(--color-bg); border: 2px solid var(--color-border); }
.input::placeholder { color: var(--color-text-muted); }
.input:focus { outline: var(--focus-ring); outline-offset: 0; box-shadow: var(--focus-shadow); }
.badge { display: inline-flex; align-items: center; gap: .4em; font-size: var(--text-sm); font-weight: 700;
  padding: .2em .6em; border-radius: var(--radius-pill); background: var(--color-surface);
  border: 1px solid var(--color-border); color: var(--color-text); }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } }


/* Especificação de referência: references/00-flagship-implementation-specs/govuk-design.md */
```

## Design System Variables

```css
--bg: #ffffff, --fg: #0b0c0c, --accent: #00703c, --surface: #f3f2f1, --radius: 0px, --spacing: 20px, --font-display: 'GDS Transport', 'Helvetica Neue', Arial, sans-serif, --font-body: 'GDS Transport', 'Helvetica Neue', Arial, sans-serif
```

## Implementation Checklist

- Contraste WCAG AA; foco visível; navegação por teclado; estados hover/pressed; responsividade; prefers-reduced-motion; Tailwind v4 via @theme.

## Execution Rules

1. Strictly follow the defined visual style.
2. Use high-quality inline SVG icons (Heroicons or Lucide style) — NEVER use emojis as icons.
3. Add `cursor-pointer` and smooth `hover` states (transition-all) on all interactive elements.
4. Required Page Structure:
   - Navbar (Logo + Links + CTA)
   - Hero Section (Impactful Headline + Subtitle + 2 buttons + 3D/Abstract visual element via CSS)
   - Features (3 cards with icons)
   - Testimonials (3 cards)
   - Pricing (3 tiers, highlight the middle one)
   - Final CTA
   - Full Footer with social links, privacy policy, terms of use, contact and SEO links.
5. All text content must be in English.
6. The visual must be CLEARLY distinct — do not create a "default Bootstrap" design. Force the use of the provided design system variables.
7. Use `<style>` tags in the head for custom classes (especially for complex backdrop-filter effects and animations) that Tailwind CDN doesn't cover.
8. Full Responsiveness: Layout must adapt perfectly to Mobile, Tablet and Desktop (vertical stack on mobile).
9. Include basic SEO, Viewport and Open Graph meta tags in `<head>`.
10. Footer must contain: Copyright 2026, Secondary navigation links and Social media icons.
11. Make the creative decisions needed to deliver the complete, functional result now.