:root {
  /* Color System */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-300: #a5b4fc;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4361ee;
  --primary-700: #3730a3;
  --primary-800: #312e81;
  --primary-900: #1e1b4b;
  --primary-950: #111034;
  
  --secondary-50: #fbf6ff;
  --secondary-100: #f5eaff;
  --secondary-200: #edd5ff;
  --secondary-300: #dbb4fe;
  --secondary-400: #c384fc;
  --secondary-500: #ac56f7;
  --secondary-600: #9333ea;
  --secondary-700: #7209b7;
  --secondary-800: #6b21a8;
  --secondary-900: #581c87;
  --secondary-950: #330a5f;
  
  --accent-50: #ecfdff;
  --accent-100: #cff9fe;
  --accent-200: #a5f0fb;
  --accent-300: #67e3f9;
  --accent-400: #22ccef;
  --accent-500: #4cc9f0;
  --accent-600: #088ab7;
  --accent-700: #0b6e94;
  --accent-800: #0d5a7a;
  --accent-900: #124b67;
  --accent-950: #073247;
  
  /* Functional Colors */
  --success-500: #4bb543;
  --warning-500: #f0ad4e;
  --danger-500: #d9534f;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;
  
  /* Spacing System */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Roboto Mono', Menlo, monospace;
  
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  
  /* Effects */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 600ms cubic-bezier(0.25, 0.1, 0.25, 1.4);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  --radius-sm: 0.125rem;
  --radius: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Light Theme (default) */
  --bg-primary: var(--gray-50);
  --bg-secondary: white;
  --bg-tertiary: var(--gray-100);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-700);
  --text-tertiary: var(--gray-500);
  --border-color: var(--gray-200);
  --layer-01: rgba(255, 255, 255, 0.7);
  --layer-02: rgba(255, 255, 255, 0.85);
  --layer-03: rgba(255, 255, 255, 0.95);
  --glass-effect: saturate(180%) blur(20px);
  --inverse-bg: var(--gray-900);
  --inverse-text: white;
}

/* Dark Theme */
.dark {
  --bg-primary: var(--gray-950);
  --bg-secondary: var(--gray-900);
  --bg-tertiary: var(--gray-800);
  --text-primary: white;
  --text-secondary: var(--gray-300);
  --text-tertiary: var(--gray-500);
  --border-color: var(--gray-800);
  --layer-01: rgba(17, 24, 39, 0.7);
  --layer-02: rgba(17, 24, 39, 0.85);
  --layer-03: rgba(17, 24, 39, 0.95);
  --glass-effect: saturate(180%) blur(20px);
  --inverse-bg: white;
  --inverse-text: var(--gray-900);
}

/* Modern Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: var(--space-4);
}

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
  cursor: pointer;
}

a:hover {
  color: var(--primary-500);
}

/* Images */
img, picture, video, canvas, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Forms */
input, button, textarea, select {
  font: inherit;
}

/* Buttons */
button {
  cursor: pointer;
  background: none;
  border: none;
}

/* Lists */
ul, ol {
  list-style: none;
}

/* 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-width: 0;
}

/* ==========================================================================
   LAYOUT & UTILITIES
   ========================================================================== */

/* Container System */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* Spacing System */
.section {
  padding: var(--space-16) 0;
  position: relative;
}

@media (min-width: 1024px) {
  .section {
    padding: var(--space-24) 0;
  }
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .sm\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Positioning */
.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.fixed {
  position: fixed;
}

.sticky {
  position: sticky;
}

.inset-0 {
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-50 { z-index: 50; }

/* Spacing Utilities */
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.ml-2 { margin-left: var(--space-2); }
.mr-2 { margin-right: var(--space-2); }

/* Text Utilities */
.text-center {
  text-align: center;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Background Utilities */
.bg-gradient-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
}

.bg-gradient-secondary {
  background: linear-gradient(135deg, var(--secondary-600), var(--accent-600));
}

/* Visibility */
.hidden {
  display: none;
}

@media (max-width: 767px) {
  .mobile-hidden {
    display: none;
  }
}

@media (min-width: 768px) {
  .desktop-hidden {
    display: none;
  }
}

/* ==========================================================================
   ENHANCED COMPONENTS
   ========================================================================== */

/* Enhanced Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--text-base);
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
}

.btn:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary-600);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
  border-color: var(--gray-300);
}

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

.btn-ghost:hover:not(:disabled) {
  background-color: var(--bg-tertiary);
}

.btn-gradient {
  background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
  color: white;
  border: none;
}

.btn-gradient:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.btn-icon {
  padding: var(--space-3);
  width: var(--space-10);
  height: var(--space-10);
}

/* Card System */
.card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
}

.card-glass {
  background: var(--layer-02);
  backdrop-filter: var(--glass-effect);
  -webkit-backdrop-filter: var(--glass-effect);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-xl);
}

/* Form Components */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  font-size: var(--text-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-tertiary);
}

.form-textarea {
  resize: vertical;
  min-height: var(--space-24);
}

/* Alert System */
.alert {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid;
  margin-bottom: var(--space-4);
}

.alert-success {
  background-color: #ecfccb;
  border-color: var(--success-500);
  color: #15803d;
}

.alert-warning {
  background-color: #fefce8;
  border-color: var(--warning-500);
  color: #b45309;
}

.alert-danger {
  background-color: #fef2f2;
  border-color: var(--danger-500);
  color: #b91c1c;
}

.alert-info {
  background-color: #eff6ff;
  border-color: #3b82f6;
  color: #1d4ed8;
}

/* Badge System */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-primary {
  background-color: var(--primary-100);
  color: var(--primary-700);
}

.badge-secondary {
  background-color: var(--gray-100);
  color: var(--gray-700);
}

.badge-success {
  background-color: #ecfccb;
  color: #15803d;
}

.badge-warning {
  background-color: #fefce8;
  color: #b45309;
}

.badge-danger {
  background-color: #fef2f2;
  color: #b91c1c;
}

/* Navigation Components */
.nav {
  display: flex;
  list-style: none;
}

.nav-item {
  margin-right: var(--space-6);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-600);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-600);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Dropdown Component */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: 50;
}

.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  text-decoration: none;
  transition: background-color var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--bg-tertiary);
}

/* Modal Component */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.modal.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.modal.open .modal-content {
  transform: scale(1);
}

.modal-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: var(--space-6);
}

.modal-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* Progress Bar */
.progress {
  width: 100%;
  height: var(--space-2);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

/* Loading States */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

.spinner {
  width: var(--space-6);
  height: var(--space-6);
  border: 2px solid var(--bg-tertiary);
  border-top: 2px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* ==========================================================================
   ENHANCED UTILITIES
   ========================================================================== */

/* Width & Height */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-fit { width: fit-content; }
.w-screen { width: 100vw; }
.w-1\/2 { width: 50%; }
.w-1\/3 { width: 33.333333%; }
.w-2\/3 { width: 66.666667%; }
.w-1\/4 { width: 25%; }
.w-3\/4 { width: 75%; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.h-fit { height: fit-content; }
.h-screen { height: 100vh; }
.h-1\/2 { height: 50%; }

.min-w-0 { min-width: 0; }
.min-w-full { min-width: 100%; }
.min-h-0 { min-height: 0; }
.min-h-full { min-height: 100%; }
.min-h-screen { min-height: 100vh; }

.max-w-none { max-width: none; }
.max-w-xs { max-width: 20rem; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-w-4xl { max-width: 56rem; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-7xl { max-width: 80rem; }
.max-w-full { max-width: 100%; }

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }
.hidden { display: none; }

/* Overflow */
.overflow-auto { overflow: auto; }
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-scroll { overflow: scroll; }
.overflow-x-auto { overflow-x: auto; }
.overflow-x-hidden { overflow-x: hidden; }
.overflow-y-auto { overflow-y: auto; }
.overflow-y-hidden { overflow-y: hidden; }

/* Border Utilities */
.border { border: 1px solid var(--border-color); }
.border-0 { border: none; }
.border-2 { border: 2px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-r { border-right: 1px solid var(--border-color); }
.border-b { border-bottom: 1px solid var(--border-color); }
.border-l { border-left: 1px solid var(--border-color); }

.border-primary { border-color: var(--primary-500); }
.border-secondary { border-color: var(--secondary-500); }
.border-white { border-color: white; }
.border-transparent { border-color: transparent; }

.rounded-none { border-radius: 0; }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded { border-radius: var(--radius); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-3xl { border-radius: var(--radius-3xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow Utilities */
.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* Text Utilities */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }
.text-6xl { font-size: var(--text-6xl); }

.font-thin { font-weight: 100; }
.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }
.font-black { font-weight: 900; }

.leading-none { line-height: 1; }
.leading-tight { line-height: 1.25; }
.leading-snug { line-height: 1.375; }
.leading-normal { line-height: 1.5; }
.leading-relaxed { line-height: 1.625; }
.leading-loose { line-height: 2; }

.tracking-tighter { letter-spacing: -0.05em; }
.tracking-tight { letter-spacing: -0.025em; }
.tracking-normal { letter-spacing: 0em; }
.tracking-wide { letter-spacing: 0.025em; }
.tracking-wider { letter-spacing: 0.05em; }
.tracking-widest { letter-spacing: 0.1em; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-white { color: white; }
.text-black { color: black; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }
.normal-case { text-transform: none; }

.italic { font-style: italic; }
.not-italic { font-style: normal; }

.underline { text-decoration: underline; }
.line-through { text-decoration: line-through; }
.no-underline { text-decoration: none; }

/* Background Utilities */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-white { background-color: white; }
.bg-black { background-color: black; }
.bg-transparent { background-color: transparent; }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Transition Utilities */
.transition-none { transition: none; }
.transition-all { transition: all var(--transition-fast); }
.transition { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-colors { transition-property: color, background-color, border-color; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-opacity { transition-property: opacity; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-shadow { transition-property: box-shadow; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
.transition-transform { transition-property: transform; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }

.duration-75 { transition-duration: 75ms; }
.duration-100 { transition-duration: 100ms; }
.duration-150 { transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }
.duration-300 { transition-duration: 300ms; }
.duration-500 { transition-duration: 500ms; }

.ease-linear { transition-timing-function: linear; }
.ease-in { transition-timing-function: cubic-bezier(0.4, 0, 1, 1); }
.ease-out { transition-timing-function: cubic-bezier(0, 0, 0.2, 1); }
.ease-in-out { transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); }

/* Transform Utilities */
.transform { transform: var(--transform); }
.transform-none { transform: none; }

.scale-0 { transform: scale(0); }
.scale-50 { transform: scale(0.5); }
.scale-75 { transform: scale(0.75); }
.scale-90 { transform: scale(0.9); }
.scale-95 { transform: scale(0.95); }
.scale-100 { transform: scale(1); }
.scale-105 { transform: scale(1.05); }
.scale-110 { transform: scale(1.1); }
.scale-125 { transform: scale(1.25); }

.rotate-0 { transform: rotate(0deg); }
.rotate-1 { transform: rotate(1deg); }
.rotate-2 { transform: rotate(2deg); }
.rotate-3 { transform: rotate(3deg); }
.rotate-6 { transform: rotate(6deg); }
.rotate-12 { transform: rotate(12deg); }
.rotate-45 { transform: rotate(45deg); }
.rotate-90 { transform: rotate(90deg); }
.rotate-180 { transform: rotate(180deg); }

.translate-x-0 { transform: translateX(0); }
.translate-x-1 { transform: translateX(var(--space-1)); }
.translate-x-2 { transform: translateX(var(--space-2)); }
.translate-x-4 { transform: translateX(var(--space-4)); }
.-translate-x-1 { transform: translateX(calc(-1 * var(--space-1))); }
.-translate-x-2 { transform: translateX(calc(-1 * var(--space-2))); }
.-translate-x-4 { transform: translateX(calc(-1 * var(--space-4))); }

.translate-y-0 { transform: translateY(0); }
.translate-y-1 { transform: translateY(var(--space-1)); }
.translate-y-2 { transform: translateY(var(--space-2)); }
.translate-y-4 { transform: translateY(var(--space-4)); }
.-translate-y-1 { transform: translateY(calc(-1 * var(--space-1))); }
.-translate-y-2 { transform: translateY(calc(-1 * var(--space-2))); }
.-translate-y-4 { transform: translateY(calc(-1 * var(--space-4))); }

/* Hover Effects */
.hover\:scale-105:hover { transform: scale(1.05); }
.hover\:scale-110:hover { transform: scale(1.1); }
.hover\:-translate-y-1:hover { transform: translateY(calc(-1 * var(--space-1))); }
.hover\:-translate-y-2:hover { transform: translateY(calc(-1 * var(--space-2))); }
.hover\:shadow-lg:hover { box-shadow: var(--shadow-lg); }
.hover\:shadow-xl:hover { box-shadow: var(--shadow-xl); }
.hover\:opacity-80:hover { opacity: 0.8; }
.hover\:opacity-90:hover { opacity: 0.9; }

/* Focus States */
.focus\:outline-none:focus { outline: none; }
.focus\:ring:focus { box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1); }
.focus\:ring-2:focus { box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.5); }

/* Group Hover */
.group:hover .group-hover\:scale-105 { transform: scale(1.05); }
.group:hover .group-hover\:opacity-100 { opacity: 1; }
.group:hover .group-hover\:translate-x-1 { transform: translateX(var(--space-1)); }

/* ==========================================================================
   ANIMATIONS & KEYFRAMES
   ========================================================================== */

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(-25%);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }
  50% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
  }
}

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

@keyframes ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes skeleton-loading {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Animation Classes */
.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-ping {
  animation: ping 1s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.animate-fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

.animate-slide-up {
  animation: slideUp 0.5s ease-out;
}

.animate-slide-down {
  animation: slideDown 0.5s ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft 0.5s ease-out;
}

.animate-slide-in-right {
  animation: slideInRight 0.5s ease-out;
}

.animate-scale-in {
  animation: scaleIn 0.3s ease-out;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Interactive Elements */
.interactive {
  transition: all var(--transition-fast);
  cursor: pointer;
}

.interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Glass Morphism */
.glass {
  background: var(--layer-02);
  backdrop-filter: var(--glass-effect);
  -webkit-backdrop-filter: var(--glass-effect);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Gradient Backgrounds */
.bg-gradient-to-r {
  background: linear-gradient(to right, var(--primary-500), var(--secondary-500));
}

.bg-gradient-to-br {
  background: linear-gradient(to bottom right, var(--primary-500), var(--secondary-500));
}

.bg-gradient-radial {
  background: radial-gradient(circle, var(--primary-500), var(--secondary-500));
}

/* Enhanced Responsive Design */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root:not(.light) {
    color-scheme: dark;
  }
}

/* Print Styles */
@media print {
  * {
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .no-print {
    display: none !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border-color: black;
    --text-secondary: black;
  }
  
  .dark {
    --border-color: white;
    --text-secondary: white;
  }
}

/* Responsive Typography */
@media (min-width: 1024px) {
  h1 { font-size: var(--text-6xl); }
  h2 { font-size: var(--text-5xl); }
  h3 { font-size: var(--text-4xl); }
}

/* Additional Responsive Grid Utilities */
@media (min-width: 1280px) {
  .xl\:grid-cols-5 {
    grid-template-columns: repeat(5, 1fr);
  }
  
  .xl\:grid-cols-6 {
    grid-template-columns: repeat(6, 1fr);
  }
}

<style>
  /* Header clarity */
  .site-header{background:#fff;border-bottom:1px solid rgba(17,24,39,.06)}
  @media (prefers-color-scheme: dark){
    .site-header{background:#0b1220;border-bottom:1px solid rgba(255,255,255,.08)}
  }
  .nav-desktop ul{display:flex;gap:28px;align-items:center}
  .nav-link{color:#1f2937;font-weight:600;opacity:1;text-decoration:none}
  .nav-link:hover,.nav-link:focus{opacity:1;filter:none}
  @media (prefers-color-scheme: dark){
    .nav-link{color:#e5e7eb}
  }

  /* Contact dropdown */
  .nav-has-sub{position:relative}
  .nav-has-sub>.nav-link{display:flex;align-items:center;gap:.3rem}
  .nav-sub{
    position:absolute;top:120%;left:-10px;min-width:160px;
    background:#fff;border:1px solid rgba(17,24,39,.08);border-radius:14px;
    box-shadow:0 10px 30px rgba(0,0,0,.08);padding:8px;display:none;z-index:50
  }
  .nav-has-sub:hover .nav-sub,.nav-has-sub:focus-within .nav-sub{display:block}
  .nav-sub a{
    display:flex;align-items:center;gap:.5rem;
    padding:10px 12px;border-radius:10px;color:#111827;text-decoration:none
  }
  .nav-sub a:hover{background:rgba(17,24,39,.05)}
  .flag{font-size:18px;line-height:1}
  @media (prefers-color-scheme: dark){
    .nav-sub{background:#0b1220;border-color:rgba(255,255,255,.12)}
    .nav-sub a{color:#e5e7eb}
    .nav-sub a:hover{background:rgba(255,255,255,.06)}
  }

  /* Mobile menu */
  .nav-mobile .nav-sub{display:none}
  .nav-mobile .has-sub.open .nav-sub{display:block}
  .nav-mobile .nav-sub a{padding:12px 16px}
</style>

<style>
  .nav-mobile .nav-sub { display:none; margin-left: 8px; border-radius:12px; }
  .nav-mobile .has-sub.open .nav-sub { display:block; }
  .nav-mobile .nav-sub a { display:flex; align-items:center; gap:.5rem; padding:10px 12px; }
  .flag { font-size:18px; line-height:1; }
</style>