/* CSS Variables for Theme System */
:root {
  /* Colors - Light Theme */
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --primary-light: #60a5fa;
  --primary-gradient: linear-gradient(135deg, #3b82f6, #1d4ed8);
  --primary-glow: rgba(59, 130, 246, 0.4);
  --accent: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #8b5cf6, #3b82f6);
  
  --background: #ffffff;
  --surface: #f8fafc;
  --surface-hover: #f1f5f9;
  --surface-elevated: #ffffff;
  --surface-glass: rgba(248, 250, 252, 0.8);
  
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  
  --border: #e2e8f0;
  --border-focus: #3b82f6;
  --border-glass: rgba(226, 232, 240, 0.3);
  
  --success: #10b981;
  --success-light: #34d399;
  --warning: #f59e0b;
  --warning-light: #fbbf24;
  --error: #ef4444;
  --error-light: #f87171;
  --info: #06b6d4;
  --info-light: #22d3ee;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 10px 10px -5px rgb(0 0 0 / 0.04);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);
  --shadow-glow-lg: 0 0 40px rgba(59, 130, 246, 0.2);
  --shadow-colored: 0 10px 30px rgba(59, 130, 246, 0.1);
  --shadow-accent: 0 10px 30px rgba(139, 92, 246, 0.15);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  
  /* Breakpoints */
  --bp-sm: 480px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1200px;
  
  /* Transitions and Animations */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  
  /* Glass morphism and Effects */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-bg-strong: rgba(255, 255, 255, 0.2);
  --glass-border: rgba(255, 255, 255, 0.2);
  --backdrop-blur: blur(12px);
  --backdrop-blur-strong: blur(20px);
  
  /* Gradients */
  --gradient-brand: linear-gradient(135deg, var(--primary), var(--accent));
  --gradient-warm: linear-gradient(135deg, #ff7e5f, #feb47b);
  --gradient-cool: linear-gradient(135deg, #667eea, #764ba2);
  --gradient-success: linear-gradient(135deg, var(--success), var(--success-light));
  --gradient-rainbow: linear-gradient(135deg, #667eea, #764ba2, #f093fb, #f5576c, #4facfe, #00f2fe);
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --background: #0f172a;
  --surface: #1e293b;
  --surface-hover: #334155;
  --surface-elevated: #2d3748;
  --surface-glass: rgba(30, 41, 59, 0.8);
  
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --border: #334155;
  --border-focus: #60a5fa;
  --border-glass: rgba(51, 65, 85, 0.3);
  
  --glass-bg: rgba(15, 23, 42, 0.1);
  --glass-border: rgba(51, 65, 85, 0.2);
}

/* Reset and Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background: linear-gradient(135deg, var(--background) 0%, var(--surface) 100%);
  background-attachment: fixed;
  transition: background var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
    linear-gradient(135deg, transparent 0%, rgba(59, 130, 246, 0.02) 50%, transparent 100%);
  pointer-events: none;
  z-index: -1;
  animation: backgroundFloat 20s ease-in-out infinite;
}

@keyframes backgroundFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -30px) rotate(1deg); }
  66% { transform: translate(-20px, 20px) rotate(-1deg); }
}

/* Container */
.container {
  max-width: var(--bp-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-5);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-4);
  }
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-glass);
  border-bottom: 1px solid var(--border-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.header:hover::before {
  opacity: 1;
}

.header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.header:hover::after {
  opacity: 0.3;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) 0;
  gap: var(--spacing-6);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary);
  text-decoration: none;
  flex-shrink: 0;
  transition: all var(--transition-normal);
  position: relative;
}

.logo::before {
  content: '';
  position: absolute;
  inset: -4px;
  background: var(--gradient-brand);
  border-radius: var(--radius-xl);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--transition-normal);
}

.logo:hover::before {
  opacity: 0.1;
}

.logo:hover {
  transform: scale(1.05);
}

.logo i {
  font-size: var(--font-size-2xl);
  transition: transform var(--transition-bounce);
}

.logo:hover i {
  transform: rotate(15deg) scale(1.1);
}

/* Main Navigation */
.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-6);
}

.nav-links a {
  display: flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-4);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a:hover {
  color: var(--primary);
  background-color: var(--surface-hover);
}

.nav-links a.active {
  color: var(--primary);
  background-color: var(--surface);
  border: 1px solid var(--border);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background-color: var(--primary);
  border-radius: 1px;
}

@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
  }
  
  .main-nav {
    order: 3;
    width: 100%;
    margin-top: var(--spacing-3);
  }
  
  .nav-links {
    justify-content: center;
    gap: var(--spacing-3);
  }
  
  .nav-links a {
    font-size: var(--font-size-xs);
    padding: var(--spacing-2) var(--spacing-3);
  }
}

/* Search */
.search-container {
  flex: 1;
  max-width: 500px;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: var(--spacing-3);
  color: var(--text-muted);
  z-index: 2;
}

.search-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-12) var(--spacing-3) var(--spacing-10);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--surface);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.clear-search {
  position: absolute;
  right: var(--spacing-3);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--spacing-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.clear-search:hover {
  color: var(--text-secondary);
}

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  overflow: hidden;
}

.theme-toggle:hover {
  background-color: var(--surface-hover);
  border-color: var(--primary);
}

.theme-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.theme-toggle i {
  position: absolute;
  transition: all var(--transition-normal);
}

.theme-toggle .fa-sun {
  opacity: 1;
  transform: rotate(0deg);
}

.theme-toggle .fa-moon {
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle .fa-sun {
  opacity: 0;
  transform: rotate(180deg);
}

[data-theme="dark"] .theme-toggle .fa-moon {
  opacity: 1;
  transform: rotate(0deg);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-16) 0 var(--spacing-12);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.3; }
  50% { transform: scale(1.1) rotate(180deg); opacity: 0.6; }
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-tight);
  position: relative;
  z-index: 1;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
  position: relative;
  z-index: 1;
}

.hero-description strong {
  color: var(--primary);
  font-weight: var(--font-weight-semibold);
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  animation: pulse 2s infinite;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.stat-badge:hover {
  transform: translateY(-2px) scale(1.05);
}

@media (max-width: 768px) {
  .hero {
    padding: var(--spacing-12) 0 var(--spacing-8);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-description {
    font-size: var(--font-size-base);
  }
}

/* Category Navigation */
.category-nav {
  margin-bottom: var(--spacing-8);
}

.category-tabs {
  display: flex;
  gap: var(--spacing-2);
  overflow-x: auto;
  padding-bottom: var(--spacing-2);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.category-tabs::-webkit-scrollbar {
  display: none;
}

.category-tab {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-5);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background-color: var(--surface);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.category-tab:hover {
  background-color: var(--surface-hover);
  border-color: var(--primary);
  color: var(--text-primary);
}

.category-tab.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: white;
}

.category-tab:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

/* Calculator Grid */
.calculator-grid {
  margin-bottom: var(--spacing-16);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-6);
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

/* Calculator Card */
.calculator-card {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-3xl);
  padding: var(--spacing-6);
  cursor: pointer;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  height: 100%;
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  position: relative;
  overflow: hidden;
}

.calculator-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.calculator-card::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: all var(--transition-slow);
  transform: scale(0);
}

.calculator-card:hover {
  transform: translateY(-12px) scale(1.03);
  box-shadow: var(--shadow-2xl), var(--shadow-glow-lg);
  border-color: var(--primary);
}

.calculator-card:hover::before {
  opacity: 0.05;
}

.calculator-card:hover::after {
  opacity: 1;
  transform: scale(1);
}

.calculator-card:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2), var(--shadow-xl);
}

.card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-brand);
  color: white;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  flex-shrink: 0;
  position: relative;
  transition: all var(--transition-bounce);
}

.card-icon::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-xl);
  z-index: -1;
  opacity: 0;
  filter: blur(8px);
  transition: opacity var(--transition-normal);
}

.calculator-card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.calculator-card:hover .card-icon::before {
  opacity: 0.6;
}

.card-content {
  flex: 1;
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
  line-height: var(--line-height-tight);
}

.card-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  flex: 1;
}

.card-footer {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--border);
}

.card-category {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--primary);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

/* No Results */
.no-results {
  text-align: center;
  padding: var(--spacing-16) var(--spacing-8);
  color: var(--text-muted);
}

.no-results i {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-4);
  opacity: 0.5;
}

.no-results h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-2);
  color: var(--text-secondary);
}

.no-results p {
  font-size: var(--font-size-base);
}

/* Loading Overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-spinner {
  background-color: var(--surface-elevated);
  padding: var(--spacing-8);
  border-radius: var(--radius-2xl);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.loading-spinner i {
  font-size: var(--font-size-2xl);
  color: var(--primary);
  margin-bottom: var(--spacing-4);
}

.loading-spinner span {
  display: block;
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

/* Footer */
.footer {
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--spacing-16) 0 var(--spacing-8);
  margin-top: var(--spacing-20);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.footer-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary);
  margin-bottom: var(--spacing-4);
}

.footer-subtitle {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.footer-description {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-2);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

.footer-bottom a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-bottom a:hover {
  color: var(--primary);
}

/* Calculator Interface */
.calculator-interface {
  background-color: var(--surface);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  margin-bottom: var(--spacing-8);
  border: 1px solid var(--border);
}

.calculator-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-8);
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.back-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-5);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.back-button:hover {
  background-color: var(--surface-hover);
  border-color: var(--primary);
  color: var(--primary);
}

.back-button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
}

.breadcrumb-category {
  color: var(--primary);
  font-weight: var(--font-weight-medium);
}

.breadcrumb-calculator {
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.calculator-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-8);
}

@media (max-width: 1024px) {
  .calculator-content {
    grid-template-columns: 1fr;
  }
}

.calculator-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-tight);
}

.calculator-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-8);
  line-height: var(--line-height-relaxed);
}

/* Form Styles */
.calculator-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-1);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background-color: var(--background);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.form-input:invalid,
.form-select:invalid {
  border-color: var(--error);
}

.input-prefix,
.input-suffix {
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
}

.input-prefix {
  border-right: none;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.input-suffix {
  border-left: none;
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.input-prefix + .form-input {
  border-left: none;
  border-radius: 0;
}

.form-input + .input-suffix {
  border-left: none;
}

.input-prefix + .form-input + .input-suffix {
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

.form-help {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-1);
}

/* Radio and Checkbox Styles */
.radio-group,
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.radio-label,
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  cursor: pointer;
  padding: var(--spacing-3);
  border-radius: var(--radius-lg);
  transition: background-color var(--transition-fast);
}

.radio-label:hover,
.checkbox-label:hover {
  background-color: var(--surface-hover);
}

.radio-input,
.checkbox-input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.radio-text,
.checkbox-text {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  line-height: var(--line-height-normal);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-smooth);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--transition-normal);
}

.btn:hover::before {
  left: 100%;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--gradient-brand);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-colored);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
  background-color: var(--surface);
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background-color: var(--surface-hover);
  border-color: var(--primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}

.btn-outline:hover {
  background-color: var(--surface-hover);
  border-color: var(--primary);
  color: var(--primary);
}

.form-actions {
  display: flex;
  gap: var(--spacing-4);
  margin-top: var(--spacing-6);
  flex-wrap: wrap;
}

/* Results Styles */
.calculator-results {
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
}

.results-header {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-6);
  padding-bottom: var(--spacing-3);
  border-bottom: 1px solid var(--border);
}

.results-grid {
  display: grid;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-4);
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.result-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: var(--font-weight-medium);
}

.result-value {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--primary);
  text-align: right;
}

.results-details {
  margin-top: var(--spacing-6);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--border);
}

.details-header {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.details-grid {
  display: grid;
  gap: var(--spacing-2);
}

.detail-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-2) 0;
  font-size: var(--font-size-sm);
}

.detail-label {
  color: var(--text-secondary);
}

.detail-value {
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
}

.share-print-actions {
  display: flex;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

/* Error and Validation Styles */
.validation-error {
  background-color: var(--error);
  color: white;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-4);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.error-message {
  background-color: var(--surface);
  border: 1px solid var(--error);
  border-left: 4px solid var(--error);
  color: var(--error);
  padding: var(--spacing-4);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-sm);
}

/* Animation and Transitions */
.search-highlight {
  animation: highlightPulse 0.3s ease-in-out;
}

@keyframes highlightPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1000;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 6px;
}

/* Search Results Count */
.search-results-count {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-1);
  text-align: center;
}

/* Popular Badge */
.card-badge {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-2);
  background-color: var(--warning);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  margin-left: var(--spacing-2);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .calculator-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .breadcrumb {
    order: -1;
  }
  
  .calculator-title {
    font-size: var(--font-size-2xl);
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .share-print-actions {
    flex-direction: column;
  }
  
  .result-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-2);
  }
  
  .result-value {
    text-align: left;
  }
}

/* Print Styles */
@media print {
  .header,
  .category-nav,
  .footer,
  .theme-toggle,
  .search-container,
  .back-button,
  .form-actions,
  .share-print-actions,
  .no-print {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .calculator-interface {
    box-shadow: none !important;
    border: none !important;
  }
}

/* Page-Specific Styles */

/* Page Hero */
.page-hero {
  text-align: center;
  padding: var(--spacing-16) 0 var(--spacing-12);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--spacing-12);
}

.page-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-tight);
}

.page-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-4);
  line-height: var(--line-height-relaxed);
}

.last-updated {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  background-color: var(--surface);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

/* Page Content */
.page-content {
  max-width: 800px;
  margin: 0 auto;
}

.content-section {
  margin-bottom: var(--spacing-16);
}

.section-header {
  margin-bottom: var(--spacing-8);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.section-title i {
  color: var(--primary);
  font-size: var(--font-size-xl);
}

.section-content {
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.section-content p {
  margin-bottom: var(--spacing-4);
}

.section-content .lead {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-6);
}

/* About Page Styles */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.feature-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  text-align: center;
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background-color: var(--primary);
  color: white;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  margin: 0 auto var(--spacing-4);
}

.feature-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.value-item {
  padding: var(--spacing-4) 0;
}

.value-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.value-title i {
  color: var(--primary);
}

.value-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  margin-top: var(--spacing-4);
}

.tech-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.tech-item i {
  color: var(--primary);
}

/* CTA Section */
.cta-section {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-12);
  text-align: center;
}

.cta-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.cta-description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-8);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  gap: var(--spacing-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Contact Page Styles */
.contact-methods {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.contact-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  text-align: center;
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.contact-icon {
  width: 56px;
  height: 56px;
  background-color: var(--primary);
  color: white;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  margin: 0 auto var(--spacing-4);
}

.contact-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.contact-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-relaxed);
}

.contact-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.contact-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* Contact Form */
.contact-form {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  margin-top: var(--spacing-6);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-6);
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

.field-error {
  color: var(--error);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-1);
  display: none;
}

.form-input.field-error,
.form-select.field-error,
.form-textarea.field-error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.1);
}

/* FAQ Styles */
.faq-list {
  margin-top: var(--spacing-6);
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-4);
  overflow: hidden;
}

.faq-toggle {
  width: 100%;
  background: var(--surface);
  border: none;
  padding: var(--spacing-4) var(--spacing-6);
  text-align: left;
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  transition: background-color var(--transition-fast);
}

.faq-toggle:hover {
  background-color: var(--surface-hover);
}

.faq-toggle i {
  color: var(--primary);
  transition: transform var(--transition-fast);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  background-color: var(--background);
  padding: 0 var(--spacing-4);
  transition: all var(--transition-normal);
}

.faq-answer p {
  margin: 0;
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Response Notice */
.response-notice {
  background-color: var(--surface);
  border: 1px solid var(--primary);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
}

.notice-content {
  display: flex;
  gap: var(--spacing-4);
  align-items: flex-start;
}

.notice-icon {
  color: var(--primary);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.notice-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.notice-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin: 0;
}

/* Privacy Page Styles */
.privacy-content {
  max-width: 900px;
}

.privacy-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-4);
  margin-top: var(--spacing-6);
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
}

.highlight-item i {
  color: var(--success);
  font-size: var(--font-size-base);
}

.subsection-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin: var(--spacing-6) 0 var(--spacing-3) 0;
}

.privacy-list {
  margin: var(--spacing-3) 0;
  padding-left: var(--spacing-6);
}

.privacy-list li {
  margin-bottom: var(--spacing-2);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.usage-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  text-align: center;
}

.usage-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
}

.usage-title i {
  color: var(--primary);
}

.protection-measures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.measure-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
}

.measure-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.measure-title i {
  color: var(--primary);
}

.third-party-list {
  margin-top: var(--spacing-6);
}

.third-party-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  margin-bottom: var(--spacing-4);
}

.third-party-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.third-party-purpose {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-1);
}

.third-party-data {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-3);
}

.third-party-link {
  color: var(--primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
}

.third-party-link:hover {
  text-decoration: underline;
}

.third-party-note {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-2);
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.rights-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
  margin-top: var(--spacing-6);
}

.right-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
}

.right-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.right-title i {
  color: var(--primary);
}

.cookies-table {
  margin-top: var(--spacing-4);
  overflow-x: auto;
}

.privacy-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-4);
}

.privacy-table th,
.privacy-table td {
  padding: var(--spacing-3) var(--spacing-4);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.privacy-table th {
  background-color: var(--surface);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

.privacy-table td {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.contact-privacy {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  text-align: center;
}

.contact-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
}

.contact-title i {
  color: var(--primary);
}

.contact-description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: var(--line-height-relaxed);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  align-items: center;
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.contact-method i {
  color: var(--primary);
}

.contact-method a {
  color: var(--primary);
  text-decoration: none;
}

.contact-method a:hover {
  text-decoration: underline;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .page-hero {
    padding: var(--spacing-12) 0 var(--spacing-8);
  }
  
  .page-title {
    font-size: var(--font-size-3xl);
  }
  
  .page-subtitle {
    font-size: var(--font-size-base);
  }
  
  .section-title {
    font-size: var(--font-size-xl);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-2);
  }
  
  .features-grid,
  .values-grid,
  .contact-methods,
  .usage-grid,
  .protection-measures,
  .rights-list {
    grid-template-columns: 1fr;
  }
  
  .tech-stack {
    justify-content: center;
  }
  
  .cta-title {
    font-size: var(--font-size-2xl);
  }
  
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-actions .btn {
    width: 100%;
    max-width: 300px;
  }
  
  .contact-form {
    padding: var(--spacing-6);
  }
  
  .notice-content {
    flex-direction: column;
    text-align: center;
  }
  
  .contact-info {
    align-items: center;
  }
}

/* Creator Section Styles */
.creator-section {
  background: linear-gradient(135deg, var(--surface) 0%, var(--background) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-12);
  position: relative;
  overflow: hidden;
}

.creator-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: linear-gradient(45deg, var(--primary), var(--primary-light));
  opacity: 0.1;
  border-radius: 50%;
  transform: translate(30px, -30px);
}

.creator-card {
  position: relative;
  z-index: 1;
}

.creator-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-6);
}

.creator-avatar {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-3xl);
  color: white;
  flex-shrink: 0;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.creator-avatar::after {
  content: '';
  position: absolute;
  inset: -3px;
  background: linear-gradient(45deg, var(--primary), var(--primary-light), var(--primary));
  border-radius: 50%;
  z-index: -1;
  animation: rotate 3s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.creator-details {
  flex: 1;
}

.creator-name {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-1);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.creator-title-text {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-3);
  font-weight: var(--font-weight-medium);
}

.creator-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.skill-tag {
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--primary);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.skill-tag:hover {
  transform: translateY(-1px);
}

.creator-description {
  margin-bottom: var(--spacing-8);
  padding: var(--spacing-6);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
}

.creator-description::before {
  content: '💡';
  position: absolute;
  top: var(--spacing-4);
  right: var(--spacing-4);
  font-size: var(--font-size-lg);
  opacity: 0.7;
}

.creator-description p {
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-relaxed);
  color: var(--text-secondary);
}

.creator-description p:last-child {
  margin-bottom: 0;
}

.creator-social {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
  align-items: center;
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-4) var(--spacing-6);
  background: linear-gradient(135deg, #833AB4, #FD1D1D, #FCB045);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-xl);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-width: 280px;
  justify-content: center;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.social-link:hover::before {
  left: 100%;
}

.social-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(131, 58, 180, 0.3);
}

.social-link i {
  font-size: var(--font-size-xl);
}

.social-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.social-text strong {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-1);
}

.social-text small {
  font-size: var(--font-size-xs);
  opacity: 0.9;
  font-weight: var(--font-weight-normal);
}

.creator-stats {
  display: flex;
  gap: var(--spacing-6);
  justify-content: center;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-width: 100px;
  transition: all var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.stat-item i {
  color: var(--primary);
  font-size: var(--font-size-lg);
}

.stat-item span {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  text-align: center;
}

/* Mobile Creator Section */
@media (max-width: 768px) {
  .creator-info {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-4);
  }
  
  .creator-avatar {
    width: 60px;
    height: 60px;
    font-size: var(--font-size-2xl);
  }
  
  .creator-name {
    font-size: var(--font-size-xl);
  }
  
  .creator-description {
    padding: var(--spacing-4);
  }
  
  .social-link {
    min-width: auto;
    width: 100%;
    max-width: 300px;
  }
  
  .creator-stats {
    gap: var(--spacing-3);
  }
  
  .stat-item {
    min-width: 80px;
    padding: var(--spacing-2);
  }
}

/* Creator Banner Styles */
.creator-banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: var(--spacing-8) 0;
  margin-top: var(--spacing-8);
  position: relative;
  overflow: hidden;
}

.creator-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="90" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.3;
}

.banner-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
  gap: var(--spacing-6);
}

.banner-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.banner-avatar {
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  color: white;
  flex-shrink: 0;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.banner-text {
  flex: 1;
}

.banner-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: white;
  margin-bottom: var(--spacing-1);
}

.creator-highlight {
  background: linear-gradient(45deg, #FFD700, #FFA500);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: var(--font-weight-bold);
}

.banner-description {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
  margin: 0;
}

.banner-cta {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  background: rgba(255, 255, 255, 0.15);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-xl);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

.banner-cta:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.banner-cta i {
  font-size: var(--font-size-base);
}

/* Mobile Banner */
@media (max-width: 768px) {
  .creator-banner {
    padding: var(--spacing-6) 0;
  }
  
  .banner-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-4);
  }
  
  .banner-info {
    flex-direction: column;
    gap: var(--spacing-3);
  }
  
  .banner-avatar {
    width: 48px;
    height: 48px;
    font-size: var(--font-size-lg);
  }
  
  .banner-title {
    font-size: var(--font-size-base);
  }
  
  .banner-description {
    font-size: var(--font-size-xs);
  }
  
  .banner-cta {
    width: 100%;
    max-width: 250px;
    justify-content: center;
  }
}

/* Advanced Animations and Micro-interactions */

/* Floating Animation for Cards */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.calculator-card:nth-child(odd) {
  animation: float 6s ease-in-out infinite;
  animation-delay: 0s;
}

.calculator-card:nth-child(even) {
  animation: float 6s ease-in-out infinite;
  animation-delay: 3s;
}

/* Ripple Effect for Buttons */
@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

.btn {
  position: relative;
  overflow: hidden;
}

.btn:active::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  animation: ripple 0.6s ease-out;
}

/* Pulse Animation for Important Elements */
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

.pulse-animation {
  animation: pulse 2s infinite;
}

/* Gradient Text Animation */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.gradient-text {
  background: linear-gradient(-45deg, var(--primary), var(--accent), var(--primary-light), var(--accent));
  background-size: 400% 400%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 3s ease infinite;
}

/* Enhanced Hover States */
.calculator-card:hover .card-title {
  color: var(--primary);
  transition: color var(--transition-fast);
}

.calculator-card:hover .card-description {
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

/* Performance Optimizations */
.calculator-card,
.btn,
.nav-links a,
.category-tab {
  will-change: transform;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .calculator-card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}