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Zhongwei Li
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skills/modern-web-design/references/design-systems.md
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skills/modern-web-design/references/design-systems.md
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# Modern Web Design Systems
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## Design Categories
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### 1. Minimalist Professional
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#### Color Palette
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```css
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/* Primary Colors */
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--primary-50: #f8fafc;
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--primary-100: #f1f5f9;
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--primary-500: #64748b;
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--primary-900: #0f172a;
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/* Accent Colors */
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--accent-500: #3b82f6;
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--accent-600: #2563eb;
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/* Semantic Colors */
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--success: #10b981;
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--warning: #f59e0b;
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--error: #ef4444;
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```
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#### Typography Scale
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```css
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/* Font Family */
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--font-sans: 'Inter', system-ui, sans-serif;
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--font-mono: 'JetBrains Mono', monospace;
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/* Font Sizes */
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--text-xs: 0.75rem; /* 12px */
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--text-sm: 0.875rem; /* 14px */
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--text-base: 1rem; /* 16px */
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--text-lg: 1.125rem; /* 18px */
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--text-xl: 1.25rem; /* 20px */
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--text-2xl: 1.5rem; /* 24px */
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--text-3xl: 1.875rem; /* 30px */
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--text-4xl: 2.25rem; /* 36px */
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```
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#### Spacing System
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```css
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--space-1: 0.25rem; /* 4px */
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--space-2: 0.5rem; /* 8px */
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--space-4: 1rem; /* 16px */
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--space-6: 1.5rem; /* 24px */
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--space-8: 2rem; /* 32px */
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--space-12: 3rem; /* 48px */
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--space-16: 4rem; /* 64px */
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--space-20: 5rem; /* 80px */
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```
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### 2. Modern SaaS
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#### Color Palette
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```css
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/* Primary Gradient */
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--primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
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--primary-500: #667eea;
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--primary-600: #5a67d8;
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/* Background Colors */
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--bg-primary: #ffffff;
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--bg-secondary: #f7fafc;
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--bg-tertiary: #edf2f7;
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/* Interactive Colors */
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--interactive-hover: #e2e8f0;
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--interactive-active: #cbd5e0;
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```
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#### Component Elevation
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```css
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/* Shadow System */
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--shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
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--shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
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--shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
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--shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
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```
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#### Animation Timing
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```css
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--duration-fast: 150ms;
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--duration-normal: 250ms;
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--duration-slow: 350ms;
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--ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
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```
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### 3. Creative Portfolio
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#### Experimental Color Scheme
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```css
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/* Vibrant Palette */
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--primary-pink: #ec4899;
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--primary-purple: #8b5cf6;
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--primary-blue: #06b6d4;
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--primary-green: #10b981;
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/* Dark Mode */
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--dark-bg: #0f0f23;
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--dark-surface: #1a1a3e;
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--dark-text: #e2e8f0;
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```
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#### Creative Typography
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```css
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/* Display Fonts */
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--font-display: 'Playfair Display', serif;
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--font-creative: 'Space Grotesk', sans-serif;
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/* Font Weights */
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--weight-light: 300;
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--weight-normal: 400;
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--weight-medium: 500;
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--weight-bold: 700;
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--weight-black: 900;
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```
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### 4. E-commerce Optimized
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#### Trust & Conversion Colors
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```css
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/* Primary Brand */
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--brand-primary: #059669;
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--brand-secondary: #0d9488;
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/* Conversion Elements */
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--cta-primary: #dc2626;
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--cta-secondary: #ea580c;
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--trust-green: #059669;
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--urgency-orange: #ea580c;
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```
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#### Product Display
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```css
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/* Product Card */
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--product-bg: #ffffff;
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--product-border: #e5e7eb;
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--product-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
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/* Price Display */
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--price-primary: #1f2937;
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--price-sale: #dc2626;
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--price-original: #9ca3af;
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```
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## Layout Systems
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### Grid Patterns
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#### 12-Column Grid
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```css
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.container {
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max-width: 1280px;
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margin: 0 auto;
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padding: 0 1rem;
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}
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.grid-12 {
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display: grid;
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grid-template-columns: repeat(12, 1fr);
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gap: 1.5rem;
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}
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```
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#### Card Grid System
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```css
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.card-grid {
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display: grid;
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grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
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gap: 2rem;
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}
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```
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### Responsive Breakpoints
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```css
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/* Mobile First */
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@media (min-width: 640px) { /* sm */ }
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@media (min-width: 768px) { /* md */ }
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@media (min-width: 1024px) { /* lg */ }
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@media (min-width: 1280px) { /* xl */ }
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@media (min-width: 1536px) { /* 2xl */ }
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```
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## Component Patterns
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### Button Variants
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```css
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/* Primary Button */
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.btn-primary {
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background: var(--primary-500);
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color: white;
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padding: 0.75rem 1.5rem;
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border-radius: 0.5rem;
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transition: all var(--duration-normal) var(--ease-in-out);
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}
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.btn-primary:hover {
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background: var(--primary-600);
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transform: translateY(-1px);
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box-shadow: var(--shadow-lg);
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}
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```
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### Card Components
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```css
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.card {
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background: var(--bg-primary);
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border-radius: 0.75rem;
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box-shadow: var(--shadow-md);
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overflow: hidden;
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transition: all var(--duration-normal) var(--ease-in-out);
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}
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.card:hover {
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transform: translateY(-4px);
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box-shadow: var(--shadow-xl);
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}
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```
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### Input Styling
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```css
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.input-field {
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width: 100%;
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padding: 0.75rem 1rem;
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border: 2px solid var(--gray-200);
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border-radius: 0.5rem;
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font-size: var(--text-base);
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transition: border-color var(--duration-fast);
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}
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.input-field:focus {
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outline: none;
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border-color: var(--primary-500);
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box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
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}
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```
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## Animation Library
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### Micro-interactions
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```css
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/* Hover Lift */
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.hover-lift {
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transition: transform var(--duration-normal) var(--ease-in-out);
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}
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.hover-lift:hover {
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transform: translateY(-2px);
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}
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/* Scale on Hover */
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.hover-scale {
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transition: transform var(--duration-normal) var(--ease-in-out);
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}
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.hover-scale:hover {
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transform: scale(1.05);
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}
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```
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### Loading States
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```css
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@keyframes pulse {
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0%, 100% { opacity: 1; }
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50% { opacity: 0.5; }
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}
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.loading {
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animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
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}
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```
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### Scroll Animations
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```css
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@keyframes fadeInUp {
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from {
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opacity: 0;
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transform: translateY(30px);
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}
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to {
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opacity: 1;
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transform: translateY(0);
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}
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}
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.animate-fade-in-up {
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animation: fadeInUp 0.6s ease-out;
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}
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```
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## Accessibility Standards
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### Color Contrast
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- AA Standard: 4.5:1 for normal text
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- AA Standard: 3:1 for large text
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- AAA Standard: 7:1 for normal text
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### Focus States
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```css
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.focus-visible {
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outline: 2px solid var(--primary-500);
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outline-offset: 2px;
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}
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```
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### Screen Reader Support
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- Use semantic HTML elements
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- Include ARIA labels where needed
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- Maintain logical heading hierarchy
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- Provide alt text for images
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