Sketch Style

STYLEKIT_STYLE_REFERENCE
style_name: Sketch Style
style_slug: sketch-style
style_source: /styles/sketch-style

# 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 Sketch Style design frontend development expert. All generated code must strictly follow these constraints:

## Absolute Prohibitions

- Using perfect straight-line borders border-solid (prefer border-dashed)
- Using pure white backgrounds bg-white
- Using gradients bg-gradient-*
- Using glass blur backdrop-blur
- Using perfect rounded corners rounded-xl, rounded-2xl
- Using overly saturated colors

## Must Follow

- Paper-colored background bg-[#f5f0e8]
- Dashed or irregular borders border-2 border-dashed border-[#2c2c2c]
- Serif italic fonts font-serif italic
- Slight tilt rotate-[-0.5deg] or rotate-[0.5deg]
- Pencil gray primary color #2c2c2c
- Hand-drawn feel shadows shadow-[3px_3px_0_rgba(44,44,44,0.15)]

## Color Palette

Primary:
- Pencil gray: #2c2c2c
- Paper beige: #f5f0e8

Accent colors (low saturation):
- Red: #e74c3c
- Blue: #3498db
- Green: #27ae60
- Yellow: #f39c12

## Special Effects

Paper texture: Using SVG texture backgrounds
Cross-hatching shadows: Line-style semi-transparent shadows
Hand-drawn annotations: Dashed circles, wavy underlines
Irregular arrangement: Elements slightly tilted

## Self-Check

After generating code, verify:
1. Using paper-colored background not pure white
2. Borders are dashed or irregular style
3. Text uses serif italic
4. Elements have slight tilt
5. Overall feel is like a hand-drawn sketchbook

## Animation & Interaction Rules

- Pencil Shading: Hover can quickly shade line elements to pencil gray with inverted white text, simulating pencil smudging.
- Stroke Jitter: Interactions allow slight rotation and displacement jitter, preserving hand-drawn brush stroke instability.
- Scribble Reveal: Text emphasis prioritizes dashed/wavy underlines or hand-drawn trajectory styles.
- Paper Press: Active state should reduce shadow and enhance tilt, expressing pen-tip paper-pressing damping feel.

---

# Sketch Style Design System

> A design style simulating pencil hand-drawing, with irregular line borders, paper texture backgrounds, handwritten font feel, sketch shadows, and doodle decorations, conveying a warm and approachable handcrafted texture.

## Design Philosophy

Sketch Style is a design style simulating hand-drawn pencil sketches, injecting warm handcrafted texture into digital interfaces through irregular lines, paper textures, and handwritten-feel elements.

Core principles:
- Handcrafted feel: Lines and shapes don't pursue perfect alignment, preserving the irregularity of hand-drawing
- Paper texture: Warm beige backgrounds simulating sketchbook paper
- Pencil lines: Borders use uneven hand-drawn style lines
- Sketch shadows: Using cross-hatching to simulate shadow effects

---

## Token Dictionary (exact class mapping)

### Border
```
Width: border-2
Color: border-[#2c2c2c]
Radius: rounded-sm
```

### Shadow
```
sm: shadow-[1px_1px_0px_rgba(44,44,44,0.3)]
md: shadow-[2px_2px_0px_rgba(44,44,44,0.3)]
lg: shadow-[3px_3px_0px_rgba(44,44,44,0.3)]
hover: hover:shadow-[2px_2px_0px_rgba(44,44,44,0.5)]
focus: focus:shadow-[2px_2px_0px_rgba(44,44,44,0.4)]
```

### Interaction
```
Hover translate: (none)
Hover scale: (none)
Hover opacity: hover:opacity-90
Transition: transition-opacity duration-200
Active: active:opacity-80
```

### Typefaces
```
Heading: font-sans font-semibold tracking-normal
Body: font-sans
Mono: font-mono
```

### Type scale
```
Hero: text-3xl md:text-5xl lg:text-6xl
H1: text-2xl md:text-4xl
H2: text-xl md:text-2xl
H3: text-lg md:text-xl
Body: text-sm md:text-base
Small: text-xs md:text-sm
```

### Spacing
```
Section: py-10 md:py-16 lg:py-24
Container: px-4 md:px-6 lg:px-10
Card: p-4 md:p-6
Gap sm: gap-2 md:gap-3
Gap md: gap-3 md:gap-5
Gap lg: gap-5 md:gap-8
```

### Color roles
```
Background primary: bg-[#f5f0e8]
Background secondary: bg-[#e8e2d8]
Background accent: bg-[#2c2c2c], bg-[#6b6b6b], bg-[#a0a0a0]
Text primary: text-[#2c2c2c]
Text secondary: text-[#5a5a5a]
Text muted: text-[#8a8a8a]
Button primary: bg-[#2c2c2c] text-[#f5f0e8]
Button secondary: bg-transparent text-[#2c2c2c] border-2 border-dashed border-[#2c2c2c]
```

---

## [FORBIDDEN]

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

### Banned classes
- `rounded-xl`
- `rounded-2xl`
- `rounded-3xl`
- `rounded-full`
- `shadow-lg`
- `shadow-xl`
- `shadow-2xl`
- `bg-[#ff71ce]`
- `bg-[#01cdfe]`
- `bg-[#ff006e]`
- `bg-[#00ff00]`
- `text-[#ff71ce]`
- `text-[#01cdfe]`
- `text-[#ff006e]`
- `border-4`
- `font-black`
- `bg-gradient-to-r`
- `bg-gradient-to-l`

### Banned patterns
- matches `^rounded-(?:xl|2xl|3xl|full)$`
- matches `^shadow-(?:lg|xl|2xl)$`
- matches `^bg-(?:\[#ff|\[#01cd|\[#00ff)`
- matches `^bg-gradient-`

### Why they are banned
- `rounded-xl`: Sketch style uses minimal rounding (rounded-sm) for a hand-drawn feel
- `shadow-xl`: Sketch style uses very subtle pencil-like shadows, not heavy shadows
- `bg-[#ff71ce]`: Sketch style uses pencil tones (grays, cream), not neon colors
- `bg-gradient-to-r`: Sketch style uses flat paper-like surfaces, not gradients

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

---

## [REQUIRED]

### Every button must include
```
rounded-sm
border-2 border-dashed border-[#2c2c2c]
transition-opacity duration-200
font-semibold
```

### Every card must include
```
rounded-sm
border-2 border-dashed border-[#2c2c2c]
bg-[#f5f0e8]
shadow-[2px_2px_0px_rgba(44,44,44,0.3)]
```

### Every input must include
```
rounded-sm
border-2 border-dashed border-[#2c2c2c]
bg-[#faf5ed]
font-sans
focus:shadow-[2px_2px_0px_rgba(44,44,44,0.4)]
focus:outline-none
```

---

## [COMPARE] Sketch Style 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-sm border-2 border-dashed border-[#2c2c2c] transition-opacity duration-200 font-semibold bg-[#2c2c2c] text-[#f5f0e8]">
  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-sm border-2 border-dashed border-[#2c2c2c] bg-[#f5f0e8] shadow-[2px_2px_0px_rgba(44,44,44,0.3)] p-4 md:p-6">
  <h3 class="font-sans font-semibold tracking-normal text-lg md:text-xl">{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-sm border-2 border-dashed border-[#2c2c2c] bg-[#faf5ed] font-sans focus:shadow-[2px_2px_0px_rgba(44,44,44,0.4)] focus:outline-none" placeholder="{PLACEHOLDER}" />
```

---

## [TEMPLATES] Sketch Style page skeletons

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

### Navigation
```html
<nav class="bg-[#f5f0e8] text-[#2c2c2c] border-2 border-[#2c2c2c] px-4 md:px-6 lg:px-10">
  <div class="flex items-center justify-between max-w-6xl mx-auto gap-3 md:gap-5">
    <a href="/" class="font-sans font-semibold tracking-normal text-lg md:text-xl">
      {LOGO_TEXT}
    </a>
    <div class="flex gap-3 md:gap-5 font-sans text-xs md:text-sm">
      {NAV_LINKS}
    </div>
  </div>
</nav>
```

### Hero section
```html
<section class="bg-[#2c2c2c] text-[#2c2c2c] py-10 md:py-16 lg:py-24 px-4 md:px-6 lg:px-10">
  <div class="max-w-4xl mx-auto">
    <h1 class="font-sans font-semibold tracking-normal text-3xl md:text-5xl lg:text-6xl">
      {HEADLINE}
    </h1>
    <p class="font-sans text-sm md:text-base max-w-xl">
      {SUBHEADLINE}
    </p>
    <button class="rounded-sm border-2 border-dashed border-[#2c2c2c] transition-opacity duration-200 font-semibold bg-[#2c2c2c] text-[#f5f0e8]">
      {CTA_TEXT}
    </button>
  </div>
</section>
```

### Card grid
```html
<section class="bg-[#f5f0e8] text-[#2c2c2c] py-10 md:py-16 lg:py-24 px-4 md:px-6 lg:px-10">
  <div class="max-w-6xl mx-auto">
    <h2 class="font-sans font-semibold tracking-normal text-xl md:text-2xl">{SECTION_TITLE}</h2>
    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-3 md:gap-5">
      <!-- Card template - repeat for each card -->
      <div class="rounded-sm border-2 border-dashed border-[#2c2c2c] bg-[#f5f0e8] shadow-[2px_2px_0px_rgba(44,44,44,0.3)] p-4 md:p-6">
        <h3 class="font-sans font-semibold tracking-normal text-lg md:text-xl">{CARD_TITLE}</h3>
        <p class="font-sans text-sm md:text-base text-[#8a8a8a]">{CARD_DESCRIPTION}</p>
      </div>
    </div>
  </div>
</section>
```

### Form input
```html
<input class="rounded-sm border-2 border-dashed border-[#2c2c2c] bg-[#faf5ed] font-sans focus:shadow-[2px_2px_0px_rgba(44,44,44,0.4)] focus:outline-none" placeholder="{PLACEHOLDER}" />
```

### Footer
```html
<footer class="bg-[#e8e2d8] text-[#5a5a5a] py-10 md:py-16 lg:py-24 px-4 md:px-6 lg:px-10">
  <div class="max-w-6xl mx-auto">
    <div class="grid grid-cols-1 md:grid-cols-3 gap-5 md:gap-8">
      <div>
        <span class="font-sans font-semibold tracking-normal text-lg md:text-xl">{LOGO_TEXT}</span>
        <p class="font-sans text-xs md:text-sm">{TAGLINE}</p>
      </div>
      <div>
        <h4 class="font-sans font-semibold tracking-normal text-lg md:text-xl">{COLUMN_TITLE}</h4>
        <ul class="font-sans text-xs md:text-sm">
          {FOOTER_LINKS}
        </ul>
      </div>
    </div>
  </div>
</footer>
```

---

## [CHECKLIST] Sketch Style post-generation self check

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

### Token check
- [ ] Button includes: `rounded-sm border-2 border-dashed border-[#2c2c2c] transition-opacity duration-200 font-semibold`
- [ ] Card includes: `rounded-sm border-2 border-dashed border-[#2c2c2c] bg-[#f5f0e8] shadow-[2px_2px_0px_rgba(44,44,44,0.3)]`
- [ ] Input includes: `rounded-sm border-2 border-dashed border-[#2c2c2c] bg-[#faf5ed] font-sans focus:shadow-[2px_2px_0px_rgba(44,44,44,0.4)] focus:outline-none`

### Forbidden check
- [ ] Not using `rounded-xl`
- [ ] Not using `rounded-2xl`
- [ ] Not using `rounded-3xl`
- [ ] Not using `rounded-full`
- [ ] Not using `shadow-lg`
- [ ] Not using `shadow-xl`
- [ ] Not using `shadow-2xl`
- [ ] Not using `bg-[#ff71ce]`

### Style rule check
- [ ] Use paper-colored background bg-[#f5f0e8]
- [ ] Use irregular style borders border-2 border-dashed or wavy
- [ ] Use handwritten-style or serif fonts
- [ ] Use cross-hatching effects for shadows instead of solid colors
- [ ] Keep elements slightly tilted rotate-[-1deg] for hand-drawn feel

### Style drift check
- [ ] Does not violate: Do NOT use perfect straight lines and rounded corners
- [ ] Does not violate: Do NOT use pure white backgrounds (should use paper color)
- [ ] Does not violate: Do NOT use gradient effects
- [ ] Does not violate: Do NOT use glass blur effects
- [ ] Does not violate: Do NOT use overly saturated colors

### 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 Sketch Style

## Absolute Bans (Match and Refuse)

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

- use perfect straight lines and rounded corners
- use pure white backgrounds (should use paper color)
- use gradient effects
- use glass blur effects
- use overly saturated colors
- use long smooth animations (hand-drawn feedback should be short and direct)
- use overly regular hover changes (need to preserve rough brush stroke feel)

## 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 perfect straight lines and rounded corners
- [ ] do NOT use pure white backgrounds (should use paper color)
- [ ] do NOT use gradient effects
- [ ] do NOT use glass blur effects
- [ ] do NOT use overly saturated colors