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design language·neubrutalist-black-white-interfaces

Neubrutalist Black-and-White Interfaces

A portable design language for agents: download the markdown first, then inspect the preview, tokens, and rules as needed.

Download DESIGN.md

Portable DESIGN.md source of truth for most agents and apps.

the spec

specification

philosophy
summary
A loud monochrome interface language that turns every screen into a posterized workstation: paper-white fields, dense black outlines, oversized grotesk headlines, and playful accent blocks used like marker strokes rather than gentle decoration.
values
Instant legibility through harsh black-on-white contrast and oversized hierarchy.Playful confrontation: interfaces should feel bold, tactile, and slightly irreverent rather than neutral.Structural honesty where borders, offsets, shadows, and labels visibly explain containment and interaction.
anti-values
×Soft gradients, tasteful subtlety, and invisible chrome.×Corporate slickness that hides structure behind polish.
tokens
colors12 items
primary
#111111
secondary
#F5F1E8
accent
#D8FF36
background
#FCFAF5
surface
#FFFFFF
text
#111111
muted
#6A6862
border
#111111
error
#FF5A36
success
#1F9D55
warning
#FF8A00
info
#111111
typography8 items
heading font
Archivo Black
body font
Space Grotesk
mono font
IBM Plex Mono
base size
16px
scale ratio
1.25
line height
1.5
letter spacing
-0.02em
google fonts url
https://fonts.googleapis.com/css2?family=Archivo+Black&family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;700&display=swap
spacing2 items
base
8px
scale
4, 8, 12, 16, 24, 32, 48, 64
radii5 items
none
0
sm
0
md
0
lg
0
full
9999px
shadows3 items
sm
4px 4px 0 #111111
md
8px 8px 0 #111111
lg
12px 12px 0 #111111
surfaces3 items
treatment
paper
card style
Flat paper-white panels with severe black outlines, offset black shadows, and occasional acid accent slabs tucked behind content blocks.
bg pattern
grid
borders4 items
default width
3px
accent width
5px
style
solid
character
Borders are not separators but the main graphic voice: heavy, uncompromising, cartoon-bold, and always visible at a distance.
motion3 items
duration
160ms
easing
cubic-bezier(0.2, 0.9, 0.2, 1)
philosophy
snappy
rules
composition
Build scenes as poster-like boards of nested modules, with one dominant headline zone, one dense operational workspace, and supporting notes or stats arranged as offset stacks.
hierarchy
Hierarchy should come from scale shock first, then border weight, then accent slabs and monospace labels; body text remains restrained so headlines and controls do the shouting.
density

Medium-high density with many visible controls and summaries, but each group boxed clearly so the screen feels energetic rather than chaotic.

signature patterns
Primary buttons and interactive chips must use heavy bottom-right shadow offsets that collapse to a smaller offset on hover, making every control feel like a movable printed block.Section titles should pair massive uppercase grotesk text with acid or orange highlight bars placed behind only part of the phrase, never full-width washes or subtle fades.Information cards should include small monospace corner tags inside bordered capsules, reinforcing an annotated zine-like system rather than anonymous product UI.At least one panel in every major region should use slight rotation or translation on a pseudo-layer behind the card, creating a stacked paper collision effect with hard edges.
layout
grid
Use a bold editorial dashboard grid: wide main workspace columns with narrower side stacks, strong gutters, and internal card grids that collapse from 3 columns to 2 to 1.
breakpoints
Desktop at 1440px supports multi-column board layout; tablet at 768px reduces to stacked main and side regions; mobile at 375px becomes a single vertical flow with full-width controls.
whitespace
Whitespace is deliberate but not luxurious: keep tight internal padding, roomy external gaps between modules, and preserve breathing room around giant headlines so the composition still reads.
guidance
do
  • Use black outlines and offset shadows on all primary structural elements.
  • Keep the palette mostly monochrome, then deploy accent color in short, loud blocks.
  • Mix oversized display typography with compact monospace labels to emphasize contrast.
  • Let modules overlap visually through offsets, rotated backing plates, and stacked borders.
avoid
  • Do not round corners or soften borders into generic SaaS cards.
  • Do not use gradients, glass, blur, or low-contrast gray-on-gray surfaces.
  • Do not let accent colors dominate the whole canvas; they should puncture the composition.
  • Do not hide form controls in minimal chrome or browser defaults.
katagami spec
# Neubrutalist Black-and-White Interfaces

## Philosophy

A loud monochrome interface language that turns every screen into a posterized workstation: paper-white fields, dense black outlines, oversized grotesk headlines, and playful accent blocks used like marker strokes rather than gentle decoration.

### Values

- Instant legibility through harsh black-on-white contrast and oversized hierarchy.
- Playful confrontation: interfaces should feel bold, tactile, and slightly irreverent rather than neutral.
- Structural honesty where borders, offsets, shadows, and labels visibly explain containment and interaction.

### Anti-Values

- Soft gradients, tasteful subtlety, and invisible chrome.
- Corporate slickness that hides structure behind polish.

### Visual Character

- Every major container uses thick 3px to 5px black borders with hard rectangular corners and exaggerated offset drop shadows that look screen-printed rather than photoreal.
- Hero headlines are set in an ultra-bold grotesk uppercase style, tightly packed and oversized, while labels and metadata use compact monospace tags in bordered capsules.
- Accent color appears only in blunt rectangular blocks, underlines, badges, and sticky-note panels so the white-and-black foundation remains dominant and the color feels like a loud interruption.
- Cards, buttons, filters, and data modules use visibly stacked layers with slight rotation, translation, or shadow offsets to create a cut-paper collage feeling without using skeuomorphic textures.

## Tokens

### Colors

| Name | Value |
|------|-------|
| primary | `#111111` |
| secondary | `#F5F1E8` |
| accent | `#D8FF36` |
| background | `#FCFAF5` |
| surface | `#FFFFFF` |
| text | `#111111` |
| muted | `#6A6862` |
| border | `#111111` |
| error | `#FF5A36` |
| success | `#1F9D55` |
| warning | `#FF8A00` |
| info | `#111111` |

### Typography

- **Heading Font**: Archivo Black
- **Body Font**: Space Grotesk
- **Mono Font**: IBM Plex Mono
- **Base Size**: 16px
- **Scale Ratio**: 1.25
- **Line Height**: 1.5
- **Letter Spacing**: -0.02em
- **Google Fonts Url**: https://fonts.googleapis.com/css2?family=Archivo+Black&family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;700&display=swap

### Spacing

- **Base**: 8px
- **Scale**: [4,8,12,16,24,32,48,64]

### Radii

- **None**: 0
- **Sm**: 0
- **Md**: 0
- **Lg**: 0
- **Full**: 9999px

### Shadows

- **Sm**: 4px 4px 0 #111111
- **Md**: 8px 8px 0 #111111
- **Lg**: 12px 12px 0 #111111

### Surfaces

- **Treatment**: paper
- **Card Style**: Flat paper-white panels with severe black outlines, offset black shadows, and occasional acid accent slabs tucked behind content blocks.
- **Bg Pattern**: grid

### Borders

- **Default Width**: 3px
- **Accent Width**: 5px
- **Style**: solid
- **Character**: Borders are not separators but the main graphic voice: heavy, uncompromising, cartoon-bold, and always visible at a distance.

### Motion

- **Duration**: 160ms
- **Easing**: cubic-bezier(0.2, 0.9, 0.2, 1)
- **Philosophy**: snappy

## Rules

### Composition

Build scenes as poster-like boards of nested modules, with one dominant headline zone, one dense operational workspace, and supporting notes or stats arranged as offset stacks.

### Hierarchy

Hierarchy should come from scale shock first, then border weight, then accent slabs and monospace labels; body text remains restrained so headlines and controls do the shouting.

### Density

Medium-high density with many visible controls and summaries, but each group boxed clearly so the screen feels energetic rather than chaotic.

### Signature Patterns

- Primary buttons and interactive chips must use heavy bottom-right shadow offsets that collapse to a smaller offset on hover, making every control feel like a movable printed block.
- Section titles should pair massive uppercase grotesk text with acid or orange highlight bars placed behind only part of the phrase, never full-width washes or subtle fades.
- Information cards should include small monospace corner tags inside bordered capsules, reinforcing an annotated zine-like system rather than anonymous product UI.
- At least one panel in every major region should use slight rotation or translation on a pseudo-layer behind the card, creating a stacked paper collision effect with hard edges.

## Layout

### Grid

Use a bold editorial dashboard grid: wide main workspace columns with narrower side stacks, strong gutters, and internal card grids that collapse from 3 columns to 2 to 1.

### Breakpoints

Desktop at 1440px supports multi-column board layout; tablet at 768px reduces to stacked main and side regions; mobile at 375px becomes a single vertical flow with full-width controls.

### Whitespace

Whitespace is deliberate but not luxurious: keep tight internal padding, roomy external gaps between modules, and preserve breathing room around giant headlines so the composition still reads.

## Guidance

### Do

- Use black outlines and offset shadows on all primary structural elements.
- Keep the palette mostly monochrome, then deploy accent color in short, loud blocks.
- Mix oversized display typography with compact monospace labels to emphasize contrast.
- Let modules overlap visually through offsets, rotated backing plates, and stacked borders.

### Don't

- Do not round corners or soften borders into generic SaaS cards.
- Do not use gradients, glass, blur, or low-contrast gray-on-gray surfaces.
- Do not let accent colors dominate the whole canvas; they should puncture the composition.
- Do not hide form controls in minimal chrome or browser defaults.
DESIGN.md
---
version: "alpha"
name: "Neubrutalist Black-and-White Interfaces"
description: "Agent-curated design language exported from Katagami as DESIGN.md."
colors:
  primary: "#111111"
  secondary: "#F5F1E8"
  accent: "#D8FF36"
  background: "#FCFAF5"
  surface: "#FFFFFF"
  text: "#111111"
  muted: "#6A6862"
  border: "#111111"
  error: "#FF5A36"
  success: "#1F9D55"
  warning: "#FF8A00"
  info: "#111111"
typography:
  headline-lg:
    fontFamily: "Archivo Black"
    fontSize: "1.953rem"
    fontWeight: 700
    lineHeight: 1.1
    letterSpacing: "-0.02em"
  headline-md:
    fontFamily: "Archivo Black"
    fontSize: "1.563rem"
    fontWeight: 600
    lineHeight: 1.15
    letterSpacing: "-0.02em"
  body-md:
    fontFamily: "Space Grotesk"
    fontSize: "16px"
    fontWeight: 400
    lineHeight: 1.5
    letterSpacing: "-0.02em"
  label-md:
    fontFamily: "IBM Plex Mono"
    fontSize: "0.75rem"
    fontWeight: 600
    lineHeight: 1
    letterSpacing: "0.08em"
rounded:
  none: "0px"
  sm: "0px"
  md: "0px"
  lg: "0px"
  full: "9999px"
spacing:
  base: "8px"
  xs: "4px"
  sm: "8px"
  md: "12px"
  lg: "16px"
  xl: "24px"
  2xl: "32px"
  3xl: "48px"
  4xl: "64px"
components:
  color-reference-primary:
    backgroundColor: "{colors.primary}"
  color-reference-secondary:
    backgroundColor: "{colors.secondary}"
  color-reference-accent:
    backgroundColor: "{colors.accent}"
  color-reference-background:
    backgroundColor: "{colors.background}"
  color-reference-surface:
    backgroundColor: "{colors.surface}"
  color-reference-text:
    backgroundColor: "{colors.text}"
  color-reference-muted:
    backgroundColor: "{colors.muted}"
  color-reference-border:
    backgroundColor: "{colors.border}"
  color-reference-error:
    backgroundColor: "{colors.error}"
  color-reference-success:
    backgroundColor: "{colors.success}"
  color-reference-warning:
    backgroundColor: "{colors.warning}"
  color-reference-info:
    backgroundColor: "{colors.info}"
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "#ffffff"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: "{spacing.md}"
  card-surface:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    padding: "{spacing.md}"
  input-default:
    backgroundColor: "{colors.surface}"
    textColor: "{colors.text}"
    rounded: "{rounded.md}"
    height: "44px"
---

# Neubrutalist Black-and-White Interfaces

## Overview

A loud monochrome interface language that turns every screen into a posterized workstation: paper-white fields, dense black outlines, oversized grotesk headlines, and playful accent blocks used like marker strokes rather than gentle decoration.

### Values

- Instant legibility through harsh black-on-white contrast and oversized hierarchy.
- Playful confrontation: interfaces should feel bold, tactile, and slightly irreverent rather than neutral.
- Structural honesty where borders, offsets, shadows, and labels visibly explain containment and interaction.

### Anti-Values

- Soft gradients, tasteful subtlety, and invisible chrome.
- Corporate slickness that hides structure behind polish.

### Visual Character

- Every major container uses thick 3px to 5px black borders with hard rectangular corners and exaggerated offset drop shadows that look screen-printed rather than photoreal.
- Hero headlines are set in an ultra-bold grotesk uppercase style, tightly packed and oversized, while labels and metadata use compact monospace tags in bordered capsules.
- Accent color appears only in blunt rectangular blocks, underlines, badges, and sticky-note panels so the white-and-black foundation remains dominant and the color feels like a loud interruption.
- Cards, buttons, filters, and data modules use visibly stacked layers with slight rotation, translation, or shadow offsets to create a cut-paper collage feeling without using skeuomorphic textures.

## Colors

Use the YAML color tokens as the normative palette. The prose below names the roles agents should preserve when generating UI.

| Token | Value |
|-------|-------|
| primary | `#111111` |
| secondary | `#F5F1E8` |
| accent | `#D8FF36` |
| background | `#FCFAF5` |
| surface | `#FFFFFF` |
| text | `#111111` |
| muted | `#6A6862` |
| border | `#111111` |
| error | `#FF5A36` |
| success | `#1F9D55` |
| warning | `#FF8A00` |
| info | `#111111` |

## Typography

- **Headline-Lg**: Archivo Black, 1.953rem, weight 700, line-height 1.1.
- **Headline-Md**: Archivo Black, 1.563rem, weight 600, line-height 1.15.
- **Body-Md**: Space Grotesk, 16px, weight 400, line-height 1.5.
- **Label-Md**: IBM Plex Mono, 0.75rem, weight 600, line-height 1.

## Layout

### Spacing Tokens

- **Base**: `8px`
- **Xs**: `4px`
- **Sm**: `8px`
- **Md**: `12px`
- **Lg**: `16px`
- **Xl**: `24px`
- **2xl**: `32px`
- **3xl**: `48px`
- **4xl**: `64px`

### Grid

Use a bold editorial dashboard grid: wide main workspace columns with narrower side stacks, strong gutters, and internal card grids that collapse from 3 columns to 2 to 1.

### Breakpoints

Desktop at 1440px supports multi-column board layout; tablet at 768px reduces to stacked main and side regions; mobile at 375px becomes a single vertical flow with full-width controls.

### Whitespace

Whitespace is deliberate but not luxurious: keep tight internal padding, roomy external gaps between modules, and preserve breathing room around giant headlines so the composition still reads.

## Elevation & Depth

### Shadows

- **Sm**: 4px 4px 0 #111111
- **Md**: 8px 8px 0 #111111
- **Lg**: 12px 12px 0 #111111

## Shapes

### Rounded

- **None**: `0px`
- **Sm**: `0px`
- **Md**: `0px`
- **Lg**: `0px`
- **Full**: `9999px`

### Surfaces

- **Treatment**: paper
- **Card Style**: Flat paper-white panels with severe black outlines, offset black shadows, and occasional acid accent slabs tucked behind content blocks.
- **Bg Pattern**: grid

### Borders

- **Default Width**: 3px
- **Accent Width**: 5px
- **Style**: solid
- **Character**: Borders are not separators but the main graphic voice: heavy, uncompromising, cartoon-bold, and always visible at a distance.

## Components

### Composition

Build scenes as poster-like boards of nested modules, with one dominant headline zone, one dense operational workspace, and supporting notes or stats arranged as offset stacks.

### Hierarchy

Hierarchy should come from scale shock first, then border weight, then accent slabs and monospace labels; body text remains restrained so headlines and controls do the shouting.

### Density

Medium-high density with many visible controls and summaries, but each group boxed clearly so the screen feels energetic rather than chaotic.

### Signature Patterns

- Primary buttons and interactive chips must use heavy bottom-right shadow offsets that collapse to a smaller offset on hover, making every control feel like a movable printed block.
- Section titles should pair massive uppercase grotesk text with acid or orange highlight bars placed behind only part of the phrase, never full-width washes or subtle fades.
- Information cards should include small monospace corner tags inside bordered capsules, reinforcing an annotated zine-like system rather than anonymous product UI.
- At least one panel in every major region should use slight rotation or translation on a pseudo-layer behind the card, creating a stacked paper collision effect with hard edges.

## shadcn/ui Usage

When the target app uses shadcn/ui, copy DESIGN.md with shadcn instead of the plain DESIGN.md. It contains the same Katagami design-language source plus the shadcn/ui primitives, imports, theme variables, component recipes, and preview-shot guidance.

DESIGN.md with shadcn: `/language/en-019da327-3208-72a1-9bbf-e2756d826dd9/DESIGN.with-shadcn.md`.

The shadcn page also exposes optional machine-readable files for automation, but the human-facing handoff is DESIGN.md with shadcn.

Install recommended primitives with `npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table`.

Use these primitives in shadcn apps:
- button
- card
- input
- textarea
- select
- dialog
- sheet
- tabs
- badge
- separator
- checkbox
- switch
- slider
- tooltip
- dropdown-menu
- table

Implementation rule for agents: import shadcn primitives from `@/components/ui/*`, apply the generated CSS variables first, then compose the language-specific recipes from the companion MD. Katagami remains the source of truth; shadcn names are the implementation surface.

## Do's and Don'ts

- Do Use black outlines and offset shadows on all primary structural elements.
- Do Keep the palette mostly monochrome, then deploy accent color in short, loud blocks.
- Do Mix oversized display typography with compact monospace labels to emphasize contrast.
- Do Let modules overlap visually through offsets, rotated backing plates, and stacked borders.
- Don't Do not round corners or soften borders into generic SaaS cards.
- Don't Do not use gradients, glass, blur, or low-contrast gray-on-gray surfaces.
- Don't Do not let accent colors dominate the whole canvas; they should puncture the composition.
- Don't Do not hide form controls in minimal chrome or browser defaults.
shadcn/ui theme
```json
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "neubrutalist-black-white-interfaces",
  "type": "registry:theme",
  "title": "Neubrutalist Black-and-White Interfaces shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#FCFAF5",
      "foreground": "#111111",
      "card": "#FFFFFF",
      "card-foreground": "#111111",
      "popover": "#FFFFFF",
      "popover-foreground": "#111111",
      "primary": "#111111",
      "primary-foreground": "#ffffff",
      "secondary": "#F5F1E8",
      "secondary-foreground": "#111111",
      "muted": "#6A6862",
      "muted-foreground": "#111111",
      "accent": "#D8FF36",
      "accent-foreground": "#111111",
      "destructive": "#FF5A36",
      "border": "#111111",
      "input": "#111111",
      "ring": "#D8FF36",
      "chart-1": "#111111",
      "chart-2": "#F5F1E8",
      "chart-3": "#D8FF36",
      "chart-4": "#1F9D55",
      "chart-5": "#FF8A00",
      "sidebar": "#FFFFFF",
      "sidebar-foreground": "#111111",
      "sidebar-primary": "#111111",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#111111",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#111111",
      "sidebar-ring": "#D8FF36",
      "radius": "0"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#111111",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#D8FF36",
      "accent-foreground": "#111111",
      "destructive": "#FF5A36",
      "border": "#303642",
      "input": "#303642",
      "ring": "#D8FF36",
      "chart-1": "#111111",
      "chart-2": "#F5F1E8",
      "chart-3": "#D8FF36",
      "chart-4": "#1F9D55",
      "chart-5": "#FF8A00",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#111111",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#D8FF36",
      "sidebar-accent-foreground": "#111111",
      "sidebar-border": "#303642",
      "sidebar-ring": "#D8FF36",
      "radius": "0"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019da327-3208-72a1-9bbf-e2756d826dd9",
    "slug": "neubrutalist-black-white-interfaces",
    "componentManifest": [
      "button",
      "card",
      "input",
      "textarea",
      "select",
      "dialog",
      "sheet",
      "tabs",
      "badge",
      "separator",
      "checkbox",
      "switch",
      "slider",
      "tooltip",
      "dropdown-menu",
      "table"
    ],
    "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
    "nativeTokenNames": {
      "colors": [
        "accent",
        "background",
        "border",
        "error",
        "info",
        "muted",
        "primary",
        "secondary",
        "success",
        "surface",
        "text",
        "warning"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "letter_spacing",
        "line_height",
        "mono_font",
        "scale_ratio"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none",
        "sm"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ]
    }
  }
}
```
in the wild

embodiments

the full element showcase
embodiment · neubrutalist-black-white-interfaces
DESIGN.md

at a glance

Palette

Typography

headline-lgArchivo Black · 31px · 700

The quick brown fox jumps

headline-mdArchivo Black · 25px · 600

The quick brown fox jumps

body-mdSpace Grotesk · 16px · 400

The quick brown fox jumps

label-mdIBM Plex Mono · 12px · 600

The quick brown fox jumps

Components

New
Card title

Components rendered with this language’s tokens — colors, type, and rounded corners as specified.

Spacing

  • base8px
  • xs4px
  • sm8px
  • md12px
  • lg16px
  • xl24px
  • 2xl32px
  • 3xl48px
  • 4xl64px

Shape

none0px
sm0px
md0px
lg0px
full9999px
shadcn/ui

implementation kit

needs agent-authored kitcompatibility fallback
shadcn compatibility only
The generated theme variables are available, but the polished shadcn component recipes and shots have not been authored by the Katagami agent yet.
fallbackprimitives render
Compatibility proof
Local shadcn-style primitives accept the generated theme variables.
primaryaccentsurfacemutedwarningerror
table rhythm
buttonok
cardok
inputok
recommendedcompatibility fallback

DESIGN.md with shadcn

Copy this when the target app uses shadcn/ui. It packages the Katagami DESIGN.md context with the install list, theme variables, component recipes, preview-shot contract, and starter TSX in one Markdown companion.

advanced implementation filesoptional machine-readable theme, CSS, TSX starter, recipes, and preview contract
shadcn add
npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table
theme css
:root {
  --background: #FCFAF5;
  --foreground: #111111;
  --card: #FFFFFF;
  --card-foreground: #111111;
  --popover: #FFFFFF;
  --popover-foreground: #111111;
  --primary: #111111;
  --primary-foreground: #ffffff;
  --secondary: #F5F1E8;
  --secondary-foreground: #111111;
  --muted: #6A6862;
  --muted-foreground: #111111;
  --accent: #D8FF36;
  --accent-foreground: #111111;
  --destructive: #FF5A36;
  --border: #111111;
  --input: #111111;
  --ring: #D8FF36;
  --chart-1: #111111;
  --chart-2: #F5F1E8;
  --chart-3: #D8FF36;
  --chart-4: #1F9D55;
  --chart-5: #FF8A00;
  --sidebar: #FFFFFF;
  --sidebar-foreground: #111111;
  --sidebar-primary: #111111;
  --sidebar-primary-foreground: #ffffff;
  --sidebar-accent: #111111;
  --sidebar-accent-foreground: #ffffff;
  --sidebar-border: #111111;
  --sidebar-ring: #D8FF36;
  --radius: 0;
}

.dark {
  --background: #0f1115;
  --foreground: #f8fafc;
  --card: #181b22;
  --card-foreground: #f8fafc;
  --popover: #181b22;
  --popover-foreground: #f8fafc;
  --primary: #111111;
  --primary-foreground: #ffffff;
  --secondary: #252a33;
  --secondary-foreground: #f8fafc;
  --muted: #252a33;
  --muted-foreground: #a1a1aa;
  --accent: #D8FF36;
  --accent-foreground: #111111;
  --destructive: #FF5A36;
  --border: #303642;
  --input: #303642;
  --ring: #D8FF36;
  --chart-1: #111111;
  --chart-2: #F5F1E8;
  --chart-3: #D8FF36;
  --chart-4: #1F9D55;
  --chart-5: #FF8A00;
  --sidebar: #181b22;
  --sidebar-foreground: #f8fafc;
  --sidebar-primary: #111111;
  --sidebar-primary-foreground: #ffffff;
  --sidebar-accent: #D8FF36;
  --sidebar-accent-foreground: #111111;
  --sidebar-border: #303642;
  --sidebar-ring: #D8FF36;
  --radius: 0;
}
tsx starter
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardFooter,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";

export function NeubrutalistBlackAndWhiteInterfacesShadcnKit() {
  return (
    <section className="grid gap-4 rounded-[var(--radius)] border bg-background p-4 text-foreground">
      <div className="flex items-start justify-between gap-4">
        <div>
          <Badge variant="outline">shadcn/ui</Badge>
          <h2 className="mt-3 text-2xl font-semibold tracking-tight">Neubrutalist Black-and-White Interfaces</h2>
          <p className="mt-1 max-w-xl text-sm text-muted-foreground">
            Use the Katagami registry theme, then compose these shadcn primitives
            with the language-specific component recipes.
          </p>
        </div>
        <Button>Apply theme</Button>
      </div>

      <Tabs defaultValue="components">
        <TabsList>
          <TabsTrigger value="components">Components</TabsTrigger>
          <TabsTrigger value="states">States</TabsTrigger>
          <TabsTrigger value="export">Export</TabsTrigger>
        </TabsList>
      </Tabs>

      <Card>
        <CardHeader>
          <CardTitle>Component recipe</CardTitle>
          <CardDescription>
            Replace this starter content with the agent-authored product scene
            from components.md and preview-shots.json.
          </CardDescription>
        </CardHeader>
        <CardContent className="grid gap-3 sm:grid-cols-[1fr_auto]">
          <Input defaultValue="Tokenized shadcn surface" aria-label="Recipe name" />
          <Button variant="secondary">Preview state</Button>
        </CardContent>
        <CardFooter className="justify-between">
          <Badge>Ready</Badge>
          <Button variant="outline">Copy recipe</Button>
        </CardFooter>
      </Card>
    </section>
  );
}
theme JSONcompatibility fallback
{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "neubrutalist-black-white-interfaces",
  "type": "registry:theme",
  "title": "Neubrutalist Black-and-White Interfaces shadcn Theme",
  "cssVars": {
    "theme": {},
    "light": {
      "background": "#FCFAF5",
      "foreground": "#111111",
      "card": "#FFFFFF",
      "card-foreground": "#111111",
      "popover": "#FFFFFF",
      "popover-foreground": "#111111",
      "primary": "#111111",
      "primary-foreground": "#ffffff",
      "secondary": "#F5F1E8",
      "secondary-foreground": "#111111",
      "muted": "#6A6862",
      "muted-foreground": "#111111",
      "accent": "#D8FF36",
      "accent-foreground": "#111111",
      "destructive": "#FF5A36",
      "border": "#111111",
      "input": "#111111",
      "ring": "#D8FF36",
      "chart-1": "#111111",
      "chart-2": "#F5F1E8",
      "chart-3": "#D8FF36",
      "chart-4": "#1F9D55",
      "chart-5": "#FF8A00",
      "sidebar": "#FFFFFF",
      "sidebar-foreground": "#111111",
      "sidebar-primary": "#111111",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#111111",
      "sidebar-accent-foreground": "#ffffff",
      "sidebar-border": "#111111",
      "sidebar-ring": "#D8FF36",
      "radius": "0"
    },
    "dark": {
      "background": "#0f1115",
      "foreground": "#f8fafc",
      "card": "#181b22",
      "card-foreground": "#f8fafc",
      "popover": "#181b22",
      "popover-foreground": "#f8fafc",
      "primary": "#111111",
      "primary-foreground": "#ffffff",
      "secondary": "#252a33",
      "secondary-foreground": "#f8fafc",
      "muted": "#252a33",
      "muted-foreground": "#a1a1aa",
      "accent": "#D8FF36",
      "accent-foreground": "#111111",
      "destructive": "#FF5A36",
      "border": "#303642",
      "input": "#303642",
      "ring": "#D8FF36",
      "chart-1": "#111111",
      "chart-2": "#F5F1E8",
      "chart-3": "#D8FF36",
      "chart-4": "#1F9D55",
      "chart-5": "#FF8A00",
      "sidebar": "#181b22",
      "sidebar-foreground": "#f8fafc",
      "sidebar-primary": "#111111",
      "sidebar-primary-foreground": "#ffffff",
      "sidebar-accent": "#D8FF36",
      "sidebar-accent-foreground": "#111111",
      "sidebar-border": "#303642",
      "sidebar-ring": "#D8FF36",
      "radius": "0"
    }
  },
  "meta": {
    "source": "katagami",
    "languageId": "en-019da327-3208-72a1-9bbf-e2756d826dd9",
    "slug": "neubrutalist-black-white-interfaces",
    "componentManifest": [
      "button",
      "card",
      "input",
      "textarea",
      "select",
      "dialog",
      "sheet",
      "tabs",
      "badge",
      "separator",
      "checkbox",
      "switch",
      "slider",
      "tooltip",
      "dropdown-menu",
      "table"
    ],
    "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
    "nativeTokenNames": {
      "colors": [
        "accent",
        "background",
        "border",
        "error",
        "info",
        "muted",
        "primary",
        "secondary",
        "success",
        "surface",
        "text",
        "warning"
      ],
      "typography": [
        "base_size",
        "body_font",
        "google_fonts_url",
        "heading_font",
        "letter_spacing",
        "line_height",
        "mono_font",
        "scale_ratio"
      ],
      "spacing": [
        "base",
        "scale"
      ],
      "radii": [
        "full",
        "lg",
        "md",
        "none",
        "sm"
      ],
      "shadows": [
        "lg",
        "md",
        "sm"
      ],
      "surfaces": [
        "bg_pattern",
        "card_style",
        "treatment"
      ],
      "borders": [
        "accent_width",
        "character",
        "default_width",
        "style"
      ],
      "motion": [
        "duration",
        "easing",
        "philosophy"
      ]
    }
  }
}
component recipescompatibility fallback
# Neubrutalist Black-and-White Interfaces shadcn/ui Components

Artifact: `component-recipes-v1`
Author: `katagami-ui-projection`
Language ID: `en-019da327-3208-72a1-9bbf-e2756d826dd9`
Slug: `neubrutalist-black-white-interfaces`

## Intent

A loud monochrome interface language that turns every screen into a posterized workstation: paper-white fields, dense black outlines, oversized grotesk headlines, and playful accent blocks used like marker strokes rather than gentle decoration.

## Required primitives

- button
- card
- input
- textarea
- select
- dialog
- sheet
- tabs
- badge
- separator
- checkbox
- switch
- slider
- tooltip
- dropdown-menu
- table

Install with `npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table`.

## Token cues

Colors:

{
  "primary": "#111111",
  "secondary": "#F5F1E8",
  "accent": "#D8FF36",
  "background": "#FCFAF5",
  "surface": "#FFFFFF",
  "text": "#111111",
  "muted": "#6A6862",
  "border": "#111111",
  "error": "#FF5A36",
  "success": "#1F9D55",
  "warning": "#FF8A00",
  "info": "#111111"
}

Typography:

{
  "heading_font": "Archivo Black",
  "body_font": "Space Grotesk",
  "mono_font": "IBM Plex Mono",
  "base_size": "16px",
  "scale_ratio": 1.25,
  "line_height": 1.5,
  "letter_spacing": "-0.02em",
  "google_fonts_url": "https://fonts.googleapis.com/css2?family=Archivo+Black&family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;700&display=swap"
}

## Visual character to preserve

- Every major container uses thick 3px to 5px black borders with hard rectangular corners and exaggerated offset drop shadows that look screen-printed rather than photoreal.
- Hero headlines are set in an ultra-bold grotesk uppercase style, tightly packed and oversized, while labels and metadata use compact monospace tags in bordered capsules.
- Accent color appears only in blunt rectangular blocks, underlines, badges, and sticky-note panels so the white-and-black foundation remains dominant and the color feels like a loud interruption.
- Cards, buttons, filters, and data modules use visibly stacked layers with slight rotation, translation, or shadow offsets to create a cut-paper collage feeling without using skeuomorphic textures.

## ShadSync visual profile

{
  "family": "paper-collage",
  "material": "paper",
  "contour": "default",
  "border": "solid",
  "underlay": true,
  "grain": true,
  "stickerBadges": true,
  "motion": "still",
  "density": "dense",
  "accents": [
    "primary",
    "accent",
    "secondary",
    "muted"
  ]
}

## Signature component recipes

### Button
Use `Button` for primary, secondary, outline, and ghost actions. Primary actions must expose the language's strongest contrast pair, while secondary and ghost actions should preserve the surface treatment instead of falling back to default neutral SaaS styling.

### Card
Use `Card`, `CardHeader`, `CardContent`, `CardFooter`, and `CardAction` as the main composition frame. Cards should demonstrate the language's surface, border, hierarchy, and density rules rather than appearing as generic rounded rectangles.

### Input and Textarea
Use `Input` and `Textarea` with visible focus rings, field labels, validation states, and the language's rhythm. Forms should show real product content, not placeholder-only controls.

### Select, Tabs, and Table
Use `Select`, `Tabs`, and `Table` to prove navigation, filtering, and dense data states. The table should show row rhythm, separators, hover/focus states, and an empty or status state when the language calls for it.

### Dialog and Sheet
Use `Dialog` for centered decisions and `Sheet` for contextual editing. Both should inherit the language's spacing, border, overlay, and motion rules.

## Preview shots

- `application-shell`: dashboard or workspace shell with navigation, cards, forms, and state badges.
- `detail-editor`: focused editing flow using input, textarea, select, switch/checkbox, dialog or sheet, and action buttons.
- `data-operations`: table-heavy operational view with tabs, dropdown menu affordances, badges, and destructive/empty states.
- Each preview shot must include a renderable `scene` payload with concrete headline, description, actions, and rows/fields/stats for the UI preview.

## Implementation contract

- Start from local `ui/src/components/ui` shadcn-style primitives; do not create a second component system.
- Apply `/katagami/shadcn/neubrutalist-black-white-interfaces/registry-theme.json` variables, then use these recipes for composition and state design.
- Preserve Katagami token names as source metadata; shadcn semantic names are only the export surface.
- Do: Use black outlines and offset shadows on all primary structural elements.; Keep the palette mostly monochrome, then deploy accent color in short, loud blocks.; Mix oversized display typography with compact monospace labels to emphasize contrast.; Let modules overlap visually through offsets, rotated backing plates, and stacked borders.
- Do not: Do not round corners or soften borders into generic SaaS cards.; Do not use gradients, glass, blur, or low-contrast gray-on-gray surfaces.; Do not let accent colors dominate the whole canvas; they should puncture the composition.; Do not hide form controls in minimal chrome or browser defaults.

## Copy-paste component example

This generated starter proves the import shape. Production Katagami agents should replace it with a language-specific product composition.

```tsx
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Card,
  CardContent,
  CardDescription,
  CardFooter,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Tabs, TabsList, TabsTrigger } from "@/components/ui/tabs";

export function NeubrutalistBlackAndWhiteInterfacesShadcnKit() {
  return (
    <section className="grid gap-4 rounded-[var(--radius)] border bg-background p-4 text-foreground">
      <div className="flex items-start justify-between gap-4">
        <div>
          <Badge variant="outline">shadcn/ui</Badge>
          <h2 className="mt-3 text-2xl font-semibold tracking-tight">Neubrutalist Black-and-White Interfaces</h2>
          <p className="mt-1 max-w-xl text-sm text-muted-foreground">
            Use the Katagami registry theme, then compose these shadcn primitives
            with the language-specific component recipes.
          </p>
        </div>
        <Button>Apply theme</Button>
      </div>

      <Tabs defaultValue="components">
        <TabsList>
          <TabsTrigger value="components">Components</TabsTrigger>
          <TabsTrigger value="states">States</TabsTrigger>
          <TabsTrigger value="export">Export</TabsTrigger>
        </TabsList>
      </Tabs>

      <Card>
        <CardHeader>
          <CardTitle>Component recipe</CardTitle>
          <CardDescription>
            Replace this starter content with the agent-authored product scene
            from components.md and preview-shots.json.
          </CardDescription>
        </CardHeader>
        <CardContent className="grid gap-3 sm:grid-cols-[1fr_auto]">
          <Input defaultValue="Tokenized shadcn surface" aria-label="Recipe name" />
          <Button variant="secondary">Preview state</Button>
        </CardContent>
        <CardFooter className="justify-between">
          <Badge>Ready</Badge>
          <Button variant="outline">Copy recipe</Button>
        </CardFooter>
      </Card>
    </section>
  );
}
```

## Layout notes

{
  "grid": "Use a bold editorial dashboard grid: wide main workspace columns with narrower side stacks, strong gutters, and internal card grids that collapse from 3 columns to 2 to 1.",
  "breakpoints": "Desktop at 1440px supports multi-column board layout; tablet at 768px reduces to stacked main and side regions; mobile at 375px becomes a single vertical flow with full-width controls.",
  "whitespace": "Whitespace is deliberate but not luxurious: keep tight internal padding, roomy external gaps between modules, and preserve breathing room around giant headlines so the composition still reads."
}
preview shotscompatibility fallback
{
  "artifact": "katagami:shadcn-preview-shots",
  "version": "preview-shots-v1",
  "generator": "katagami-ui-compatibility-projection",
  "generatedBy": "katagami-ui-projection",
  "requiresVisualProfile": true,
  "schema": "katagami:shadcn-preview-shots/renderable-v1",
  "renderable": true,
  "language": {
    "id": "en-019da327-3208-72a1-9bbf-e2756d826dd9",
    "name": "Neubrutalist Black-and-White Interfaces",
    "slug": "neubrutalist-black-white-interfaces"
  },
  "installCommand": "npx shadcn@latest add button card input textarea select dialog sheet tabs badge separator checkbox switch slider tooltip dropdown-menu table",
  "primitives": [
    "button",
    "card",
    "input",
    "textarea",
    "select",
    "dialog",
    "sheet",
    "tabs",
    "badge",
    "separator",
    "checkbox",
    "switch",
    "slider",
    "tooltip",
    "dropdown-menu",
    "table"
  ],
  "identityNotes": [
    "Every major container uses thick 3px to 5px black borders with hard rectangular corners and exaggerated offset drop shadows that look screen-printed rather than photoreal.",
    "Hero headlines are set in an ultra-bold grotesk uppercase style, tightly packed and oversized, while labels and metadata use compact monospace tags in bordered capsules.",
    "Accent color appears only in blunt rectangular blocks, underlines, badges, and sticky-note panels so the white-and-black foundation remains dominant and the color feels like a loud interruption.",
    "Cards, buttons, filters, and data modules use visibly stacked layers with slight rotation, translation, or shadow offsets to create a cut-paper collage feeling without using skeuomorphic textures."
  ],
  "visualProfile": {
    "family": "paper-collage",
    "material": "paper",
    "contour": "default",
    "border": "solid",
    "underlay": true,
    "grain": true,
    "stickerBadges": true,
    "motion": "still",
    "density": "dense",
    "accents": [
      "primary",
      "accent",
      "secondary",
      "muted"
    ]
  },
  "shots": [
    {
      "id": "application-shell",
      "title": "Application shell",
      "viewport": "desktop",
      "primitives": [
        "button",
        "card",
        "input",
        "select",
        "tabs",
        "badge",
        "separator",
        "table"
      ],
      "composition": "A real product workspace with navigation, summary cards, filtering controls, and one dense content region.",
      "mustShow": [
        "primary and secondary actions",
        "card hierarchy",
        "filterable state",
        "table or list density"
      ],
      "avoid": [
        "component inventory walls",
        "placeholder-only content",
        "generic rounded SaaS chrome"
      ],
      "scene": {
        "eyebrow": "workspace spread",
        "headline": "Neubrutalist Black-and-White Interfaces launch room",
        "description": "A product team workspace where navigation, filters, metrics, and dense rows carry the language's visible structure.",
        "primaryAction": "Apply theme",
        "secondaryAction": "Review states",
        "stats": [
          {
            "label": "components",
            "value": "16",
            "tone": "accent"
          },
          {
            "label": "states",
            "value": "ready"
          },
          {
            "label": "density",
            "value": "balanced",
            "tone": "warning"
          }
        ],
        "rows": [
          {
            "label": "Primary flow",
            "value": "mapped",
            "status": "active"
          },
          {
            "label": "Token coverage",
            "value": "semantic",
            "status": "synced"
          },
          {
            "label": "Responsive proof",
            "value": "queued",
            "status": "review"
          }
        ],
        "statuses": [
          "Active",
          "Synced",
          "Draft"
        ]
      }
    },
    {
      "id": "detail-editor",
      "title": "Detail editor",
      "viewport": "tablet",
      "primitives": [
        "button",
        "card",
        "input",
        "textarea",
        "select",
        "checkbox",
        "switch",
        "slider",
        "dialog",
        "sheet"
      ],
      "composition": "A focused editing flow with form fields, validation, confirmation, and a contextual side panel.",
      "mustShow": [
        "focus ring",
        "error or destructive state",
        "dialog or sheet treatment",
        "written guidance content"
      ],
      "avoid": [
        "unstyled browser controls",
        "floating cards inside cards",
        "missing labels"
      ],
      "scene": {
        "eyebrow": "editing flow",
        "headline": "Language recipe editor",
        "description": "A focused form proving labels, validation, toggles, panel rhythm, and action hierarchy.",
        "primaryAction": "Save recipe",
        "secondaryAction": "Open sheet",
        "fields": [
          {
            "label": "Component family",
            "value": "Narrative cards"
          },
          {
            "label": "State treatment",
            "value": "Visible focus + validation"
          },
          {
            "label": "Motion",
            "value": "Small lift, no opacity-only fade"
          }
        ],
        "statuses": [
          "Focus",
          "Invalid",
          "Confirmed"
        ]
      }
    },
    {
      "id": "data-operations",
      "title": "Data operations",
      "viewport": "mobile",
      "primitives": [
        "button",
        "tabs",
        "badge",
        "dropdown-menu",
        "table",
        "tooltip",
        "separator"
      ],
      "composition": "A compact operational view proving row rhythm, stacked actions, menu states, badges, and empty/destructive states.",
      "mustShow": [
        "responsive reflow",
        "dense row styling",
        "menu affordance",
        "status badge system"
      ],
      "avoid": [
        "desktop-only tables",
        "text overflow",
        "default shadcn spacing without Katagami character"
      ],
      "scene": {
        "eyebrow": "operations",
        "headline": "Compact review queue",
        "description": "A narrow viewport scene with rows, menus, tooltips, badges, and destructive affordances.",
        "primaryAction": "Resolve",
        "secondaryAction": "Filter",
        "rows": [
          {
            "label": "Button hierarchy",
            "value": "approved",
            "status": "ok"
          },
          {
            "label": "Table rhythm",
            "value": "needs pass",
            "status": "watch"
          },
          {
            "label": "Empty state",
            "value": "designed",
            "status": "done"
          }
        ],
        "statuses": [
          "Queued",
          "Blocked",
          "Done"
        ]
      }
    }
  ],
  "componentRecipes": [
    {
      "primitive": "button",
      "intent": "Prove action hierarchy, focus, disabled, and destructive states."
    },
    {
      "primitive": "card",
      "intent": "Carry the language surface, border, elevation, and density rules."
    },
    {
      "primitive": "input",
      "intent": "Show labels, focus rings, validation, and spacing rhythm."
    },
    {
      "primitive": "textarea",
      "intent": "Show longer guidance, validation copy, and writing density."
    },
    {
      "primitive": "select",
      "intent": "Show filtering, selection contrast, and menu trigger styling."
    },
    {
      "primitive": "dialog",
      "intent": "Show centered decision states and overlay treatment."
    },
    {
      "primitive": "sheet",
      "intent": "Show contextual side panels and responsive editing."
    },
    {
      "primitive": "tabs",
      "intent": "Show navigational structure and active/inactive contrast."
    },
    {
      "primitive": "badge",
      "intent": "Show compact status vocabulary and semantic colors."
    },
    {
      "primitive": "separator",
      "intent": "Show section rhythm without generic gray dividers."
    },
    {
      "primitive": "checkbox",
      "intent": "Show binary selection with visible focus and checked states."
    },
    {
      "primitive": "switch",
      "intent": "Show settings toggles and on/off contrast."
    },
    {
      "primitive": "slider",
      "intent": "Show numeric adjustment with track/thumb styling."
    },
    {
      "primitive": "tooltip",
      "intent": "Show concise explanation styling above compact controls."
    },
    {
      "primitive": "dropdown-menu",
      "intent": "Show action menus, destructive items, and grouped choices."
    },
    {
      "primitive": "table",
      "intent": "Show dense operational data, separators, row states, and responsive behavior."
    }
  ],
  "qualityRules": {
    "do": [
      "Use black outlines and offset shadows on all primary structural elements.",
      "Keep the palette mostly monochrome, then deploy accent color in short, loud blocks.",
      "Mix oversized display typography with compact monospace labels to emphasize contrast.",
      "Let modules overlap visually through offsets, rotated backing plates, and stacked borders."
    ],
    "dont": [
      "Do not round corners or soften borders into generic SaaS cards.",
      "Do not use gradients, glass, blur, or low-contrast gray-on-gray surfaces.",
      "Do not let accent colors dominate the whole canvas; they should puncture the composition.",
      "Do not hide form controls in minimal chrome or browser defaults."
    ]
  }
}
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