Killer Sudoku

# Design Brief: Neo-Brutalism (with Soft & Friendly)

Bold black strokes, hard offset shadows, and high-saturation color blocks.

## Design Tokens

```css
:root {
  --background: #f08a6c;
  --surface: #fff8f2;
  --foreground: #1c1c1c;
  --muted-foreground: #8c7a72;
  --accent: #f15a38;
  --radius: 16px;
  --font-heading: "Nunito", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Nunito", ui-sans-serif, system-ui, sans-serif;
}
```

Color area ratio: Background #F08A6C (~52%) · Surface #FFF8F2 (~22%) · Text #1C1C1C (~10%) · Muted Text #8C7A72 (~6%) · Accent #F15A38 (~10%). Background and surface dominate the canvas; reserve the accent color for primary buttons and active states.

## Layout & Conversion Structure

- Hero layout: Full-Bleed Canvas / Video / 3D
- Navigation: Full-Width Top Bar
- Theme & density: Light · Balanced
- Border radius & elevation: Large Radius; use elevation shadows to separate layers
- Primary visual medium: Interactive Hero Demo / Tool
- Conversion CTA: Direct Input / Instant Try
- Headline hook: Category Positioning Anchor
- Hero components: Interactive Hero Tool
- Spatial layout notes: Full-Bleed Canvas / Video / 3D hero structure paired with direct input / instant try CTA and no explicit trust bar.
- Visual summary: Neo-Brutalism (Light canvas, balanced density) featuring full-bleed canvas / video / 3d layout and interactive hero demo / tool visuals.

## Avoid

- Soft blurred shadows
- Low-contrast gray-on-gray borders
- Subtle translucent glassmorphism

Implement the UI following the design tokens and layout specifications above: use only these color variables, and reserve the accent color strictly for primary actions and active states. Adopt only this visual style—never copy any reference product’s brand name, logo, copy, or imagery.