Bauhaus

STYLEKIT_STYLE_REFERENCE
style_name: Bauhaus
style_slug: bauhaus
style_source: /styles/bauhaus

# Hard Prompt

## When To Use
Use this when you want AI to generate code with strict style consistency. It is the safest default for production UI.

## How To Use
- Copy the full prompt into ChatGPT, Claude, Cursor, or another coding assistant.
- Append the concrete product/page requirement after the prompt.
- After generation, check the forbidden rules and interaction states before accepting the output.

Strictly follow the style rules below and maintain consistency. No style drift allowed.

## Requirements

- Prioritize style consistency first, then creative extension.
- When conflicts arise, treat prohibitions as the highest priority.
- Self-check before output: verify colors, typography, spacing, and interactions still match this style.

## Style Rules

You are a Bauhaus design style frontend development expert. All generated code must strictly follow these constraints:

## Absolute Prohibitions

- Using complex gradient effects
- Using decorative elements
- Using serif fonts
- Using complex non-primary color schemes
- Using soft slow ease-in-out or duration-500+
- Using border radii (rounded-lg, rounded-xl), only rounded-full for pure circles

## Must Follow

- Primary color scheme bg-red-600, bg-yellow-400, bg-blue-600
- Black and white base bg-black, bg-white, text-black
- Thick borders border-4 border-black
- Sans-serif fonts font-bold, font-black
- Uppercase letters uppercase
- Geometric shape decorations

## Animation & Interaction Rules

- Structural Shifts: Animations reveal "structure", using sharp displacement or large solid color overlays.
- Mechanical Precision: Transition times are short and powerful duration-150 or duration-200, using ease-out.
- Primary Color Swaps: Interactions flip between red(#ff0000), yellow(#ffcc00), blue(#0000ff), black, and white in high-contrast color inversions.
- Geometric Reveals: Use pseudo-elements (e.g., absolute inset-0 bg-yellow-400) that slide in like a rail from -translate-x-full to translate-x-0 on hover, covering the original color block.
- Geometric Animation: Geometric decorative elements scale-125 or rotate-45 on hover, expressing mechanical operation feel.

## Color Palette

Only use:
- Red: #ff0000, bg-red-600
- Yellow: #ffcc00, bg-yellow-400
- Blue: #0000ff, bg-blue-600
- Black: #000000, bg-black
- White: #ffffff, bg-white

## Geometric Elements

- Circle rounded-full
- Square (no border radii)
- Triangle (using border)

---

# Bauhaus Design System

> The design philosophy of the German Bauhaus school, emphasizing functionalism, geometric forms, and primary color usage -- a modernist classic where form follows function.

## Design Philosophy

Bauhaus is a design school founded in Germany in 1919, whose core principle "form follows function" profoundly influenced modern design.

Core principles:
- Functionalism: Design serves function, removing excess decoration
- Geometric forms: Pure use of circles, squares, and triangles
- Primary colors: Red, yellow, blue primaries + black and white
- Unity: The combination of art and craft
- Mechanical precision: Interactions operate like precision instruments, short and powerful

---

## Token Dictionary (exact class mapping)

### Border
```
Width: border-2
Color: border-black
Radius: rounded-none
```

### Shadow
```
sm: shadow-none
md: shadow-none
lg: shadow-none
hover: hover:shadow-none
focus: focus:shadow-none
```

### Interaction
```
Hover translate: (none)
Hover scale: (none)
Hover opacity: hover:opacity-80
Transition: transition-opacity duration-200
Active: active:opacity-70
```

### Typefaces
```
Heading: font-sans font-bold uppercase tracking-widest
Body: font-sans
Mono: font-mono
```

### Type scale
```
Hero: text-5xl md:text-7xl lg:text-9xl
H1: text-4xl md:text-6xl
H2: text-2xl md:text-4xl
H3: text-xl md:text-2xl
Body: text-sm md:text-base
Small: text-xs md:text-sm
```

### Spacing
```
Section: py-12 md:py-24 lg:py-32
Container: px-4 md:px-8 lg:px-16
Card: p-6 md:p-8
Gap sm: gap-2 md:gap-4
Gap md: gap-4 md:gap-8
Gap lg: gap-8 md:gap-12
```

### Color roles
```
Background primary: bg-white
Background secondary: bg-black
Background accent: bg-[#dd0000], bg-[#ffd700], bg-[#0057b8]
Text primary: text-black
Text secondary: text-white
Text muted: text-gray-600
Button primary: bg-[#dd0000] text-white
Button secondary: bg-black text-white
```

---

## [FORBIDDEN]

These classes are banned in this style. Check for them before returning code:

### Banned classes
- `font-serif`
- `rounded-lg`
- `rounded-xl`
- `rounded-2xl`
- `rounded-3xl`
- `rounded-full`
- `shadow-sm`
- `shadow`
- `shadow-md`
- `shadow-lg`
- `shadow-xl`
- `shadow-2xl`
- `bg-gradient-to-r`
- `bg-gradient-to-l`
- `bg-gradient-to-b`
- `bg-gradient-to-t`
- `border-dashed`
- `border-dotted`
- `italic`

### Banned patterns
- matches `^font-serif`
- matches `^rounded-(?!none)`
- matches `^shadow-(?!none)`
- matches `^bg-gradient-`
- matches `^border-(?:dashed|dotted)`

### Why they are banned
- `font-serif`: Bauhaus uses geometric sans-serif typography only (font-sans)
- `rounded-xl`: Bauhaus uses strict geometric forms with sharp angles (rounded-none)
- `shadow-lg`: Bauhaus rejects decorative shadows; form follows function
- `bg-gradient-to-r`: Bauhaus uses flat solid primary colors (red, yellow, blue), no gradients

> WARNING: if your code contains any of the above, replace it before shipping.

---

## [REQUIRED]

### Every button must include
```
rounded-none
border-2 border-black
font-sans font-bold uppercase
transition-opacity duration-200
```

### Every card must include
```
rounded-none
border-2 border-black
bg-white
```

### Every input must include
```
rounded-none
border-2 border-black
font-sans
focus:outline-none
```

---

## [COMPARE] Bauhaus wrong vs right

The wrong examples below stand for generic library defaults that were never adapted to this style. Do not read them as visual suggestions.

### Button

[WRONG] **Wrong** (generic component library default, do not copy):
```html
<button class="{GENERIC_LIBRARY_BUTTON_DEFAULT}">
  Click me
</button>
```

[CORRECT] **Right** (uses this style's tokens):
```html
<button class="rounded-none border-2 border-black font-sans font-bold uppercase transition-opacity duration-200 bg-[#dd0000] text-white">
  Click me
</button>
```

### Card

[WRONG] **Wrong** (generic card, not adapted to this style):
```html
<div class="{GENERIC_LIBRARY_CARD_DEFAULT}">
  <h3>{TITLE}</h3>
</div>
```

[CORRECT] **Right** (uses this style's card tokens):
```html
<div class="rounded-none border-2 border-black bg-white p-6 md:p-8">
  <h3 class="font-sans font-bold uppercase tracking-widest text-xl md:text-2xl">{TITLE}</h3>
</div>
```

### Input

[WRONG] **Wrong** (generic input, not adapted to this style):
```html
<input class="{GENERIC_LIBRARY_INPUT_DEFAULT}" />
```

[CORRECT] **Right** (uses this style's input tokens):
```html
<input class="rounded-none border-2 border-black font-sans focus:outline-none" placeholder="{PLACEHOLDER}" />
```

---

## [TEMPLATES] Bauhaus page skeletons

These skeletons use this style's tokens only. Replace `{PLACEHOLDER}` values, but keep every token in place:

### Navigation
```html
<nav class="bg-white text-black border-2 border-black px-4 md:px-8 lg:px-16">
  <div class="flex items-center justify-between max-w-6xl mx-auto gap-4 md:gap-8">
    <a href="/" class="font-sans font-bold uppercase tracking-widest text-xl md:text-2xl">
      {LOGO_TEXT}
    </a>
    <div class="flex gap-4 md:gap-8 font-sans text-xs md:text-sm">
      {NAV_LINKS}
    </div>
  </div>
</nav>
```

### Hero section
```html
<section class="bg-[#dd0000] text-black py-12 md:py-24 lg:py-32 px-4 md:px-8 lg:px-16">
  <div class="max-w-4xl mx-auto">
    <h1 class="font-sans font-bold uppercase tracking-widest text-5xl md:text-7xl lg:text-9xl">
      {HEADLINE}
    </h1>
    <p class="font-sans text-sm md:text-base max-w-xl">
      {SUBHEADLINE}
    </p>
    <button class="rounded-none border-2 border-black font-sans font-bold uppercase transition-opacity duration-200 bg-[#dd0000] text-white">
      {CTA_TEXT}
    </button>
  </div>
</section>
```

### Card grid
```html
<section class="bg-white text-black py-12 md:py-24 lg:py-32 px-4 md:px-8 lg:px-16">
  <div class="max-w-6xl mx-auto">
    <h2 class="font-sans font-bold uppercase tracking-widest text-2xl md:text-4xl">{SECTION_TITLE}</h2>
    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4 md:gap-8">
      <!-- Card template - repeat for each card -->
      <div class="rounded-none border-2 border-black bg-white p-6 md:p-8">
        <h3 class="font-sans font-bold uppercase tracking-widest text-xl md:text-2xl">{CARD_TITLE}</h3>
        <p class="font-sans text-sm md:text-base text-gray-600">{CARD_DESCRIPTION}</p>
      </div>
    </div>
  </div>
</section>
```

### Form input
```html
<input class="rounded-none border-2 border-black font-sans focus:outline-none" placeholder="{PLACEHOLDER}" />
```

### Footer
```html
<footer class="bg-black text-white py-12 md:py-24 lg:py-32 px-4 md:px-8 lg:px-16">
  <div class="max-w-6xl mx-auto">
    <div class="grid grid-cols-1 md:grid-cols-3 gap-8 md:gap-12">
      <div>
        <span class="font-sans font-bold uppercase tracking-widest text-xl md:text-2xl">{LOGO_TEXT}</span>
        <p class="font-sans text-xs md:text-sm">{TAGLINE}</p>
      </div>
      <div>
        <h4 class="font-sans font-bold uppercase tracking-widest text-xl md:text-2xl">{COLUMN_TITLE}</h4>
        <ul class="font-sans text-xs md:text-sm">
          {FOOTER_LINKS}
        </ul>
      </div>
    </div>
  </div>
</footer>
```

---

## [CHECKLIST] Bauhaus post-generation self check

**Before returning code, verify every token and rule below. Fix any violation before delivering:**

### Token check
- [ ] Button includes: `rounded-none border-2 border-black font-sans font-bold uppercase transition-opacity duration-200`
- [ ] Card includes: `rounded-none border-2 border-black bg-white`
- [ ] Input includes: `rounded-none border-2 border-black font-sans focus:outline-none`

### Forbidden check
- [ ] Not using `font-serif`
- [ ] Not using `rounded-lg`
- [ ] Not using `rounded-xl`
- [ ] Not using `rounded-2xl`
- [ ] Not using `rounded-3xl`
- [ ] Not using `rounded-full`
- [ ] Not using `shadow-sm`
- [ ] Not using `shadow`

### Style rule check
- [ ] Use primary colors (red, yellow, blue) + black and white
- [ ] Apply basic geometric shapes (circle, square, triangle)
- [ ] Maintain clean functional design
- [ ] Use sans-serif fonts
- [ ] Emphasize grid and alignment

### Style drift check
- [ ] Does not violate: Do NOT use complex gradients
- [ ] Does not violate: Do NOT use decorative elements
- [ ] Does not violate: Do NOT use serif fonts
- [ ] Does not violate: Do NOT use complex non-primary color schemes
- [ ] Does not violate: Do NOT use soft slow duration-500+ transitions

### Delivery check
- [ ] Responsive layout holds on phone, tablet and desktop with no horizontal overflow
- [ ] Every interactive element has a visible focus state, an accessible name and a reduced-motion path
- [ ] Text contrast meets WCAG AA and colour alone never carries state
- [ ] The result is still recognizable at a glance as Bauhaus

## Absolute Bans (Match and Refuse)

If any of the following patterns appear, it is a style violation — rewrite without exception.

- use complex gradients
- use decorative elements
- use serif fonts
- use complex non-primary color schemes
- use soft slow duration-500+ transitions
- use ease-in-out (use ease-out)
- use border radii (rounded-lg etc.), only rounded-full for circles

## Self-Check (Verify Before Shipping)

If any item fails, the style has drifted — fix before shipping.

- [ ] No purple-to-blue gradients
- [ ] No overused fonts (Inter, Roboto, Geist, Fraunces, Plus Jakarta Sans)
- [ ] No nested cards (cards inside cards)
- [ ] No gray text on colored backgrounds
- [ ] Body text contrast meets WCAG AA (>= 4.5:1)
- [ ] No bounce or elastic easing curves
- [ ] Animations have a prefers-reduced-motion fallback
- [ ] Body text line length capped at 65-75 characters
- [ ] No side-stripe accent borders (border-left/right > 1px)
- [ ] No gradient text (background-clip: text)
- [ ] No glassmorphism used as the default surface treatment
- [ ] No tiny uppercase tracked eyebrow labels above every section heading
- [ ] do NOT use complex gradients
- [ ] do NOT use decorative elements
- [ ] do NOT use serif fonts
- [ ] do NOT use complex non-primary color schemes
- [ ] do NOT use soft slow duration-500+ transitions