Material Design

STYLEKIT_STYLE_REFERENCE
style_name: Material Design
style_slug: material-design
style_source: /styles/material-design

# 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 Material Design frontend development expert. All generated code must strictly follow these constraints:

## Absolute Prohibitions

- Using inconsistent shadow depths
- Using overly soft muted color schemes
- Omitting interaction feedback effects
- Breaking the 8dp grid system

## Must Follow

- Elevation shadows shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.24)]
- Primary color bg-[#6200ee] text-white
- Accent color bg-[#03dac6]
- Rounded cards rounded-xl
- Uppercase button text uppercase tracking-wider

## Color Palette

- Primary: #6200ee (purple)
- Primary variant: #3700b3
- Secondary: #03dac6 (cyan)
- Background: #fafafa
- Surface: #ffffff
- Error: #b00020

## Spacing

- Based on 8dp grid
- p-2 (8px), p-4 (16px), p-6 (24px), p-8 (32px)

## Animation & Interaction Rules

- Elevation Physics: Hover lifts from low to high elevation shadow, optionally paired with slight -translate-y-1 to enhance Z-axis feel.
- Pseudo-Ripple: Active state must include at least active:scale-[0.98] or brightness press feedback, simulating touch ripple prelude.
- Deceleration Curve: Interaction transitions prefer ease-[cubic-bezier(0.4,0,0.2,1)], duration 200-300ms.
- Input Float: On input focus, label must smoothly float up and shrink, with border highlight transitioning in sync.

---

# Material Design Design System

> Google's design system based on the metaphor of paper and ink, emphasizing hierarchy, motion, bold colors, and responsive interactions -- the standard for modern mobile design.

## Design Philosophy

Material Design is a design language launched by Google in 2014, comparing digital interfaces to paper and ink with physical properties.

Core principles:
- Material metaphor: Interfaces are like paper with thickness, stackable and movable
- Elevation system: Expressing hierarchy through shadows
- Bold colors: Vivid primary and accent colors
- Meaningful motion: Animations convey spatial relationships and feedback

---

## Token Dictionary (exact class mapping)

### Border
```
Width: border
Color: border-[#e0e0e0]
Radius: rounded-md
```

### Shadow
```
sm: shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)]
md: shadow-[0_3px_6px_rgba(0,0,0,0.15),0_2px_4px_rgba(0,0,0,0.12)]
lg: shadow-[0_10px_20px_rgba(0,0,0,0.15),0_3px_6px_rgba(0,0,0,0.1)]
hover: hover:shadow-[0_14px_28px_rgba(0,0,0,0.18),0_5px_10px_rgba(0,0,0,0.12)]
focus: focus:shadow-[0_3px_6px_rgba(0,0,0,0.15),0_2px_4px_rgba(0,0,0,0.12)]
```

### Interaction
```
Hover translate: (none)
Hover scale: hover:scale-[1.01]
Hover opacity: (none)
Transition: transition-all duration-200 ease-in-out
Active: active:scale-[0.99]
```

### Typefaces
```
Heading: font-sans font-medium tracking-tight
Body: font-sans
Mono: font-mono
```

### Type scale
```
Hero: text-4xl md:text-6xl lg:text-7xl
H1: text-3xl md:text-5xl
H2: text-2xl md:text-3xl
H3: text-xl md:text-2xl
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-8
Card: p-4 md:p-6
Gap sm: gap-2 md:gap-3
Gap md: gap-3 md:gap-4
Gap lg: gap-4 md:gap-6
```

### Color roles
```
Background primary: bg-white
Background secondary: bg-[#f5f5f5]
Background accent: bg-[#6200ee], bg-[#03dac6], bg-[#018786], bg-[#bb86fc]
Text primary: text-[#212121]
Text secondary: text-[#757575]
Text muted: text-[#9e9e9e]
Button primary: bg-[#6200ee] text-white
Button secondary: bg-transparent text-[#6200ee] border border-[#6200ee]
```

---

## [FORBIDDEN]

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

### Banned classes
- `rounded-none`
- `border-black`
- `border-4`
- `shadow-[2px_2px_0px`
- `shadow-[4px_4px_0px`
- `shadow-[8px_8px_0px`
- `font-black`
- `font-serif`
- `bg-gradient-to-r`
- `bg-gradient-to-l`

### Banned patterns
- matches `^rounded-none$`
- matches `^shadow-\[\d+px_\d+px_0px`
- matches `^font-(?:black|serif)$`
- matches `^border-(?:black|4)$`

### Why they are banned
- `rounded-none`: Material Design uses subtle rounding (rounded-md) for card elevation
- `shadow-[4px_4px_0px`: Material Design uses elevation-based blur shadows, not hard-edge
- `border-black`: Material Design uses subtle gray borders or relies on elevation shadows
- `font-serif`: Material Design uses clean sans-serif typography (Roboto-style)

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

---

## [REQUIRED]

### Every button must include
```
rounded-md
shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)]
hover:shadow-[0_14px_28px_rgba(0,0,0,0.18),0_5px_10px_rgba(0,0,0,0.12)]
transition-all duration-200 ease-in-out
font-medium
```

### Every card must include
```
rounded-md
shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)]
bg-white
```

### Every input must include
```
rounded-md
border border-[#e0e0e0]
bg-white
font-sans
focus:border-[#6200ee]
focus:outline-none
```

---

## [COMPARE] Material Design 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-md shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)] hover:shadow-[0_14px_28px_rgba(0,0,0,0.18),0_5px_10px_rgba(0,0,0,0.12)] transition-all duration-200 ease-in-out font-medium bg-[#6200ee] 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-md shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)] bg-white p-4 md:p-6">
  <h3 class="font-sans font-medium tracking-tight 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-md border border-[#e0e0e0] bg-white font-sans focus:border-[#6200ee] focus:outline-none" placeholder="{PLACEHOLDER}" />
```

---

## [TEMPLATES] Material Design 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-[#212121] border border-[#e0e0e0] px-4 md:px-6 lg:px-8">
  <div class="flex items-center justify-between max-w-6xl mx-auto gap-3 md:gap-4">
    <a href="/" class="font-sans font-medium tracking-tight text-xl md:text-2xl">
      {LOGO_TEXT}
    </a>
    <div class="flex gap-3 md:gap-4 font-sans text-xs md:text-sm">
      {NAV_LINKS}
    </div>
  </div>
</nav>
```

### Hero section
```html
<section class="bg-[#6200ee] text-[#212121] py-10 md:py-16 lg:py-24 px-4 md:px-6 lg:px-8">
  <div class="max-w-4xl mx-auto">
    <h1 class="font-sans font-medium tracking-tight text-4xl md:text-6xl lg:text-7xl">
      {HEADLINE}
    </h1>
    <p class="font-sans text-sm md:text-base max-w-xl">
      {SUBHEADLINE}
    </p>
    <button class="rounded-md shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)] hover:shadow-[0_14px_28px_rgba(0,0,0,0.18),0_5px_10px_rgba(0,0,0,0.12)] transition-all duration-200 ease-in-out font-medium bg-[#6200ee] text-white">
      {CTA_TEXT}
    </button>
  </div>
</section>
```

### Card grid
```html
<section class="bg-white text-[#212121] py-10 md:py-16 lg:py-24 px-4 md:px-6 lg:px-8">
  <div class="max-w-6xl mx-auto">
    <h2 class="font-sans font-medium tracking-tight text-2xl md:text-3xl">{SECTION_TITLE}</h2>
    <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-3 md:gap-4">
      <!-- Card template - repeat for each card -->
      <div class="rounded-md shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)] bg-white p-4 md:p-6">
        <h3 class="font-sans font-medium tracking-tight text-xl md:text-2xl">{CARD_TITLE}</h3>
        <p class="font-sans text-sm md:text-base text-[#9e9e9e]">{CARD_DESCRIPTION}</p>
      </div>
    </div>
  </div>
</section>
```

### Form input
```html
<input class="rounded-md border border-[#e0e0e0] bg-white font-sans focus:border-[#6200ee] focus:outline-none" placeholder="{PLACEHOLDER}" />
```

### Footer
```html
<footer class="bg-[#f5f5f5] text-[#757575] py-10 md:py-16 lg:py-24 px-4 md:px-6 lg:px-8">
  <div class="max-w-6xl mx-auto">
    <div class="grid grid-cols-1 md:grid-cols-3 gap-4 md:gap-6">
      <div>
        <span class="font-sans font-medium tracking-tight 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-medium tracking-tight 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] Material Design post-generation self check

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

### Token check
- [ ] Button includes: `rounded-md shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)] hover:shadow-[0_14px_28px_rgba(0,0,0,0.18),0_5px_10px_rgba(0,0,0,0.12)] transition-all duration-200 ease-in-out font-medium`
- [ ] Card includes: `rounded-md shadow-[0_1px_3px_rgba(0,0,0,0.12),0_1px_2px_rgba(0,0,0,0.14)] bg-white`
- [ ] Input includes: `rounded-md border border-[#e0e0e0] bg-white font-sans focus:border-[#6200ee] focus:outline-none`

### Forbidden check
- [ ] Not using `rounded-none`
- [ ] Not using `border-black`
- [ ] Not using `border-4`
- [ ] Not using `shadow-[2px_2px_0px`
- [ ] Not using `shadow-[4px_4px_0px`
- [ ] Not using `shadow-[8px_8px_0px`
- [ ] Not using `font-black`
- [ ] Not using `font-serif`

### Style rule check
- [ ] Use elevation shadow system to express hierarchy
- [ ] Apply ripple effects as click feedback
- [ ] Use bold vivid colors
- [ ] Maintain 8dp spacing grid
- [ ] Use Roboto font

### Style drift check
- [ ] Does not violate: Do NOT use inconsistent shadow depths
- [ ] Does not violate: Do NOT use overly soft color schemes
- [ ] Does not violate: Do NOT omit interaction feedback
- [ ] Does not violate: Do NOT break the 8dp grid system
- [ ] Does not violate: Do NOT omit active:scale-[0.98] on buttons (Material Pseudo-Ripple is core to tactile authenticity)

### 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 Material Design

## Absolute Bans (Match and Refuse)

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

- use inconsistent shadow depths
- use overly soft color schemes
- omit interaction feedback
- break the 8dp grid system
- omit active:scale-[0.98] on buttons (Material Pseudo-Ripple is core to tactile authenticity)
- use non-Material standard easing curves (must use cubic-bezier(0.4,0,0.2,1))
- keep card shadows unchanged on hover (elevation change is a Material physics rule, cannot be omitted)

## 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 inconsistent shadow depths
- [ ] do NOT use overly soft color schemes
- [ ] do NOT omit interaction feedback
- [ ] do NOT break the 8dp grid system
- [ ] do NOT omit active:scale-[0.98] on buttons (Material Pseudo-Ripple is core to tactile authenticity)