Cel Shading

STYLEKIT_STYLE_REFERENCE
style_name: Cel Shading
style_slug: cel-shading
style_source: /styles/cel-shading

# 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 designing in Cel Shading (Toon Shading) style.
- All elements MUST have 3px solid black borders: border-[3px] border-[#1a1a2e]
- Use hard offset shadows ONLY: shadow-[3px_3px_0_#1a1a2e] or shadow-[4px_4px_0_#1a1a2e]
- NO gradients, NO blur shadows, NO soft edges
- Flat saturated colors: #e63946, #4ea8de, #2ecc71, #f1c40f
- Text is always bold/black weight and uppercase
- Light background #fafaf5 with dark ink outlines
- Think "video game menu" or "cartoon UI"

Animation & Interaction Rules:
- Anime Physics: Use extremely short transitions (duration-75) to simulate 2D animation keyframes. Avoid silky smooth easing.
- Squash & Stretch: On :active, use cartoon physics -- active:scale-x-110 active:scale-y-90 -- combined with translate toward click direction.
- Zero-Blur Impact: On :active, hard shadow must instantly snap to zero (active:shadow-none), creating a strong physical "hit" sensation.
- Toon Highlight: On hover, a white diagonal stripe (bg-white/30 -skew-x-12) sweeps across the button via translate-x from off-screen to [200%], simulating cel shading's hard specular highlight.
- Hover Lift: Elements can hover:-translate-y-1 with expanded shadow to "charge up" before clicking.

## Absolute Bans (Match and Refuse)

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

- use gradient colors (maintain flat color fills)
- use blurred shadows shadow-lg
- use thin borders border
- use low-saturation or grayish tones
- use smooth transitions above duration-300 (too soft)
- use ease-in-out (cartoon physics uses linear or ease-in)

## 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 gradient colors (maintain flat color fills)
- [ ] do not use blurred shadows shadow-lg
- [ ] do not use thin borders border
- [ ] do not use low-saturation or grayish tones
- [ ] do not use smooth transitions above duration-300 (too soft)