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neubrutalism

Creates bold interface components with thick black borders, vivid colors, sharp corners, and solid offset shadows. Uses shared CSS settings to coordinate cards, buttons, navigation, inputs, and badges, including interaction states and accessibility considerations.

OriginalShow the original description

Neubrutalism design system skill. Use when building bold UI with thick borders, offset solid shadows, high saturation colors, and minimal border radius.

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Good for

  • Creating cards with bold borders and solid shadows
  • Adding hover and pressed states to buttons
  • Coordinating navigation, inputs, and badges
  • Checking color contrast and reducing interface motion

Files included (2)

  • SKILL.md3.2 KB
  • references/tokens.css1.0 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Neubrutalism Design Spec

Core Principles

  1. Thick Borders — Bold 3–5px solid black outlines on all elements
  2. Offset Solid Shadows — Hard-edge box-shadow with zero blur (e.g. 5px 5px 0 #000)
  3. High Saturation Colors — Vivid, punchy fills: pinks, yellows, blues, greens
  4. Minimal Radius — 0–8px border-radius; sharp or barely rounded corners
  5. Flat Aesthetic — No gradients, no blur, no transparency

CSS Tokens

Reference: references/tokens.css

@import 'references/tokens.css';

.nb-card {
  background: var(--nb-yellow);
  border: var(--nb-border-thick);
  border-radius: var(--nb-radius);
  box-shadow: var(--nb-shadow);
}

Component Examples

Card

.nb-card {
  background: var(--nb-white);
  border: var(--nb-border-thick);
  border-radius: var(--nb-radius);
  box-shadow: var(--nb-shadow);
  padding: 1.5rem;
}

Button

.nb-btn {
  background: var(--nb-yellow);
  border: var(--nb-border);
  border-radius: var(--nb-radius);
  box-shadow: var(--nb-shadow-sm);
  padding: 0.6rem 1.4rem;
  font-family: var(--nb-font);
  font-weight: var(--nb-font-weight);
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
}
.nb-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--nb-shadow);
}
.nb-btn:active {
  transform: translate(3px, 3px);
  box-shadow: none;
}

Navbar

.nb-nav {
  background: var(--nb-bg);
  border-bottom: var(--nb-border-thick);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

Input

.nb-input {
  background: var(--nb-white);
  border: var(--nb-border);
  border-radius: var(--nb-radius);
  box-shadow: var(--nb-shadow-sm);
  padding: 0.6rem 1rem;
  font-family: var(--nb-font);
  font-weight: var(--nb-font-weight-body);
}
.nb-input:focus {
  outline: none;
  box-shadow: var(--nb-shadow);
}

Badge

.nb-badge {
  background: var(--nb-pink);
  border: var(--nb-border);
  border-radius: var(--nb-radius);
  padding: 0.2rem 0.8rem;
  font-family: var(--nb-font);
  font-weight: var(--nb-font-weight);
  font-size: 0.85rem;
}

Typography

  • Use bold, geometric sans-serif fonts (Space Grotesk, Inter, etc.)
  • Headings: font-weight: 700, letter-spacing: -0.02em
  • Body: font-weight: 500
  • Uppercase sparingly for labels/badges
h1, h2, h3 {
  font-family: var(--nb-font-heading);
  font-weight: var(--nb-font-weight);
  letter-spacing: var(--nb-letter-spacing);
}
body {
  font-family: var(--nb-font);
  font-weight: var(--nb-font-weight-body);
}

Accessibility Notes

  • Thick borders provide strong visual boundaries — good for low-vision users
  • Ensure color contrast ≥ 4.5:1 for text on colored backgrounds
  • Active/hover states use transform shifts — provide prefers-reduced-motion fallback
@media (prefers-reduced-motion: reduce) {
  .nb-btn:hover, .nb-btn:active {
    transform: none;
  }
}

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