/* Performance Optimizations and Cross-Browser Compatibility */

/* Critical CSS Performance Optimizations */
/* Reduce layout thrashing and improve rendering performance */
html {
  /* Enable hardware acceleration */
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  /* Optimize font rendering */
  text-rendering: optimizeSpeed;
}

/* Optimize critical rendering path */
body {
  /* Prevent layout shifts */
  min-height: 100vh;
  /* Optimize repaints */
  contain: layout style paint;
}

/* Performance-critical elements */
.container {
  /* Contain layout calculations */
  contain: layout;
}

/* Optimize animations and transitions */
@media (prefers-reduced-motion: no-preference) {
  * {
    /* Enable hardware acceleration for smooth animations */
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }
}

/* Optimize images and media */
img, video, iframe {
  /* Prevent layout shifts */
  height: auto;
  max-width: 100%;
  /* Optimize rendering */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

/* Critical font loading optimization */
@font-face {
  font-family: 'Inter-fallback';
  src: local('Arial'), local('Helvetica'), local('sans-serif');
  font-display: swap;
  size-adjust: 107%;
  ascent-override: 90%;
  descent-override: 22%;
  line-gap-override: 0%;
}

@font-face {
  font-family: 'Poppins-fallback';
  src: local('Arial'), local('Helvetica'), local('sans-serif');
  font-display: swap;
  size-adjust: 110%;
  ascent-override: 92%;
  descent-override: 24%;
  line-gap-override: 0%;
}

/* CSS Custom Properties with Fallbacks for Older Browsers */
:root {
  /* Primary Color Palette with IE11 Fallbacks */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  
  /* Primary Colors (Legacy Support) */
  --primary-blue: var(--primary-600);
  --primary-blue-light: var(--primary-400);
  --primary-blue-dark: var(--primary-800);
  
  /* Secondary Color Palette */
  --secondary-50: #f8fafc;
  --secondary-100: #f1f5f9;
  --secondary-200: #e2e8f0;
  --secondary-300: #cbd5e1;
  --secondary-400: #94a3b8;
  --secondary-500: #64748b;
  --secondary-600: #475569;
  --secondary-700: #334155;
  --secondary-800: #1e293b;
  --secondary-900: #0f172a;
  
  /* Secondary Colors (Legacy Support) */
  --secondary-gray: var(--secondary-50);
  --secondary-gray-dark: var(--secondary-200);
  
  /* Accent Color Palettes */
  --accent-green-50: #f0fdf4;
  --accent-green-500: #22c55e;
  --accent-green-600: #16a34a;
  --accent-green-700: #15803d;
  
  --accent-orange-50: #fff7ed;
  --accent-orange-500: #f97316;
  --accent-orange-600: #ea580c;
  --accent-orange-700: #c2410c;
  
  --accent-purple-50: #faf5ff;
  --accent-purple-500: #a855f7;
  --accent-purple-600: #9333ea;
  --accent-purple-700: #7c3aed;
  
  /* Accent Colors (Legacy Support) */
  --accent-green: var(--accent-green-600);
  --accent-orange: var(--accent-orange-600);
  
  /* Semantic Text Colors */
  --text-primary: var(--secondary-900);
  --text-secondary: var(--secondary-600);
  --text-light: var(--secondary-400);
  --text-muted: var(--secondary-500);
  --text-inverse: var(--secondary-50);
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: var(--secondary-50);
  --bg-tertiary: var(--secondary-100);
  --bg-accent: var(--primary-50);
  --bg-muted: var(--secondary-100);
  
  /* Surface Colors */
  --surface-primary: #ffffff;
  --surface-secondary: var(--secondary-50);
  --surface-elevated: #ffffff;
  
  /* Border Colors */
  --border-light: var(--secondary-200);
  --border-medium: var(--secondary-300);
  --border-dark: var(--secondary-400);
  
  /* State Colors */
  --success-50: #f0fdf4;
  --success-500: #22c55e;
  --success-600: #16a34a;
  
  --warning-50: #fffbeb;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  
  --error-50: #fef2f2;
  --error-500: #ef4444;
  --error-600: #dc2626;
  
  --info-50: #eff6ff;
  --info-500: #3b82f6;
  --info-600: #2563eb;
  
  /* Font Families */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  /* Font Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  
  /* Line Heights */
  --lh-tight: 1.25;
  --lh-normal: 1.5;
  --lh-relaxed: 1.75;
  
  /* Font Weights */
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  
  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Letter Spacing */
  --ls-tighter: -0.05em;
  --ls-tight: -0.025em;
  --ls-normal: 0em;
  --ls-wide: 0.025em;
  --ls-wider: 0.05em;
  --ls-widest: 0.1em;
  
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-max: 1200px;
  
  /* Breakpoints */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  /* Enhanced Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
  --gradient-primary-soft: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--secondary-100) 0%, var(--secondary-200) 100%);
  --gradient-accent: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple-600) 100%);
  --gradient-hero: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 50%, var(--accent-purple-50) 100%);
  --gradient-hero-dark: linear-gradient(135deg, var(--primary-900) 0%, var(--secondary-900) 100%);
  --gradient-card: linear-gradient(145deg, var(--surface-primary) 0%, var(--bg-secondary) 100%);
  --gradient-card-hover: linear-gradient(145deg, var(--surface-primary) 0%, var(--primary-50) 100%);
  --gradient-success: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
  --gradient-warning: linear-gradient(135deg, var(--warning-500) 0%, var(--warning-600) 100%);
  --gradient-error: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
  --gradient-info: linear-gradient(135deg, var(--info-500) 0%, var(--info-600) 100%);
  
  /* Overlay Gradients */
  --gradient-overlay-light: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
  --gradient-overlay-dark: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.5) 100%);
  --gradient-overlay-primary: linear-gradient(135deg, rgba(59, 130, 246, 0.9) 0%, rgba(37, 99, 235, 0.7) 100%);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Animation Curves */
  --ease-in-out-back: cubic-bezier(0.68, -0.6, 0.32, 1.6);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Optimized Font Loading with Cross-Browser Support */

/* Critical font loading optimization with fallbacks */
@supports (font-display: swap) {
  @font-face {
    font-family: 'Inter';
    font-display: swap;
    font-weight: 300 700;
    font-style: normal;
  }
  @font-face {
    font-family: 'Poppins';
    font-display: swap;
    font-weight: 300 800;
    font-style: normal;
  }
}

/* Fallback for browsers that don't support font-display */
@supports not (font-display: swap) {
  @font-face {
    font-family: 'Inter';
    font-weight: 300 700;
    font-style: normal;
  }
  @font-face {
    font-family: 'Poppins';
    font-weight: 300 800;
    font-style: normal;
  }
}

/* Enhanced Font Face Declarations with Better Fallbacks */
@font-face {
  font-family: 'Inter Fallback';
  src: local('system-ui'), local('-apple-system'), local('BlinkMacSystemFont'), local('Segoe UI'), local('Roboto'), local('Arial'), local('Helvetica'), local('sans-serif');
  font-display: swap;
  font-weight: 300 700;
  font-style: normal;
}

@font-face {
  font-family: 'Poppins Fallback';
  src: local('system-ui'), local('-apple-system'), local('BlinkMacSystemFont'), local('Segoe UI'), local('Roboto'), local('Arial'), local('Helvetica'), local('sans-serif');
  font-display: swap;
  font-weight: 300 800;
  font-style: normal;
}

/* Font Loading States for Better UX */
.fonts-loading {
  visibility: hidden;
}

.fonts-loaded {
  visibility: visible;
}

/* Critical font loading optimization */
@supports (font-display: optional) {
  @font-face {
    font-family: 'Inter';
    font-display: optional;
  }
  @font-face {
    font-family: 'Poppins';
    font-display: optional;
  }
}

/* Optimized Base Reset with Cross-Browser Support */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  /* Smooth scrolling with fallback */
  scroll-behavior: smooth;
  -webkit-scroll-behavior: smooth;
  /* Performance optimization */
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
}

/* Fallback for browsers that don't support smooth scrolling */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
    -webkit-scroll-behavior: auto;
  }
}

body {
  margin: 0;
  padding-top: 80px;
  /* Font stack with comprehensive fallbacks */
  font-family: var(--font-primary, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif);
  font-size: clamp(1rem, 0.5vw + 0.875rem, 1.125rem);
  font-weight: var(--fw-normal, 400);
  line-height: var(--lh-normal, 1.5);
  letter-spacing: var(--ls-normal, 0em);
  color: var(--text-primary, #212529);
  background-color: var(--bg-primary, #ffffff);
  /* Cross-browser font smoothing */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  /* Font features with fallbacks */
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  -webkit-font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  font-variant-ligatures: common-ligatures;
  font-kerning: normal;
  -webkit-font-kerning: normal;
  /* Text size adjustment */
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  /* Performance optimizations */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

/* Enhanced Typography System with Advanced Features */

/* Typography Performance Optimizations */
.font-loading {
  font-display: swap;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}

/* Heading Styles with Fluid Sizing and Enhanced Readability */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading), 'Poppins Fallback', system-ui, -apple-system, sans-serif;
  font-weight: var(--fw-semibold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--text-primary);
  margin: 0 0 var(--space-md) 0;
  text-wrap: balance;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
}

/* Enhanced Heading Hierarchy with Improved Fluid Scaling */
h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-tighter);
  line-height: 1.1;
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: clamp(1.5rem, 3vw + 1rem, 2.75rem);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  line-height: 1.15;
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: clamp(1.25rem, 2vw + 1rem, 2.25rem);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-tight);
  line-height: 1.25;
  margin-bottom: var(--space-md);
}

h4 {
  font-size: clamp(1.125rem, 1.5vw + 0.5rem, 1.75rem);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-normal);
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

h5 {
  font-size: clamp(1rem, 1vw + 0.25rem, 1.375rem);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-normal);
  line-height: 1.35;
  margin-bottom: var(--space-sm);
}

h6 {
  font-size: clamp(0.875rem, 0.5vw + 0.25rem, 1.125rem);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  line-height: 1.4;
  margin-bottom: var(--space-sm);
}

/* Enhanced Body Text Styles with Improved Readability */
p {
  font-size: clamp(1rem, 0.5vw + 0.875rem, 1.125rem);
  line-height: var(--lh-normal);
  letter-spacing: var(--ls-normal);
  color: var(--text-secondary);
  margin: 0 0 var(--space-md) 0;
  text-wrap: pretty;
  font-feature-settings: "kern" 1, "liga" 1;
  hyphens: auto;
  word-break: break-word;
}

/* Enhanced Lead Text with Better Scaling */
.lead {
  font-size: clamp(1.125rem, 1.5vw + 0.5rem, 1.375rem);
  line-height: var(--lh-relaxed);
  font-weight: var(--fw-normal);
  color: var(--text-secondary);
  letter-spacing: var(--ls-normal);
  margin-bottom: var(--space-lg);
  text-wrap: balance;
}

/* Enhanced Small Text */
small, .small {
  font-size: clamp(0.75rem, 0.25vw + 0.7rem, 0.875rem);
  line-height: var(--lh-normal);
  color: var(--text-light);
  letter-spacing: var(--ls-normal);
}

/* Caption Text */
.caption {
  font-size: var(--fs-xs);
  line-height: var(--lh-tight);
  color: var(--text-light);
  letter-spacing: var(--ls-wide);
}

/* ===== ACCESSIBILITY STYLES ===== */

/* Skip Link for Screen Readers */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-600, #2563eb);
  color: var(--text-inverse, #ffffff);
  padding: var(--space-sm, 0.5rem) var(--space-md, 1rem);
  text-decoration: none;
  border-radius: var(--radius-md, 0.375rem);
  font-weight: var(--fw-semibold, 600);
  font-size: var(--fs-sm, 0.875rem);
  z-index: 10000;
  transition: all var(--transition-fast, 150ms ease-in-out);
}

.skip-link:focus {
  top: 6px;
  text-decoration: none;
  color: var(--text-inverse, #ffffff);
}

/* Screen Reader Only Content */
.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;
}

/* ===== HEADER AND NAVIGATION STYLES ===== */

/* Header Styles with Cross-Browser Support */
header[role="banner"] {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-primary, #ffffff);
  border-bottom: 1px solid var(--border-light, #e2e8f0);
  box-shadow: var(--shadow-sm, 0 1px 2px 0 rgba(0, 0, 0, 0.05));
  transition: all var(--transition-normal, 300ms ease-in-out);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
}

/* Header scrolled state */
header[role="banner"].header-scrolled {
  box-shadow: var(--shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.1));
  background-color: rgba(255, 255, 255, 0.98);
}

/* Header container - Enhanced for Better Logo Display */
header .container {
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  min-height: 80px;
  width: 100%;
  position: relative;
}

/* Ensure header has proper background and visibility */
header[role="banner"] {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #ffffff !important;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  transition: all 300ms ease-in-out;
  height: 80px;
  display: block !important;
}

/* Logo Styles - Enhanced for Better Visibility */
.logo {
  display: flex !important;
  align-items: center;
  text-decoration: none;
  color: #212529;
  transition: all 150ms ease-in-out;
  padding: 0.5rem 0;
  min-height: 60px;
  margin-right: auto;
}

/* Navigation Toggle Button */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  position: relative;
  width: 30px;
  height: 30px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  margin: 6px 0;
  transition: all 0.3s ease;
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  nav[role="navigation"] {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: flex-start;
    padding: 2rem;
    transition: left 0.3s ease;
    overflow-y: auto;
  }

  nav[role="navigation"].active {
    left: 0;
  }

  nav[role="navigation"] ul {
    flex-direction: column;
    width: 100%;
    text-align: center;
    gap: 1rem;
  }

  nav[role="navigation"] a {
    padding: 1rem;
    width: 100%;
    box-sizing: border-box;
  }
}

.logo h1 {
  font-size: 1.5rem;
  margin: 0;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  position: relative;
  z-index: 100;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  position: relative;
  transition: all 0.3s ease;
}

.mobile-menu-toggle span::before,
.mobile-menu-toggle span::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all 0.3s ease;
}

.mobile-menu-toggle span::before {
  top: -6px;
}

.mobile-menu-toggle span::after {
  bottom: -6px;
}

.mobile-menu-toggle.active span {
  background-color: transparent;
}

.mobile-menu-toggle.active span::before {
  transform: rotate(45deg);
  top: 0;
}

.mobile-menu-toggle.active span::after {
  transform: rotate(-45deg);
  bottom: 0;
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
  header .container {
    padding: 0.5rem 1rem;
  }

  .logo h1 {
    font-size: 1.25rem;
  }

  nav ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul.active {
    display: flex;
  }

  nav ul li {
    margin: 0.5rem 0;
    width: 100%;
  }

  nav ul li a {
    display: block;
    padding: 0.5rem 0;
    width: 100%;
  }
}

.logo:hover {
  color: #2563eb;
  text-decoration: none;
  transform: scale(1.02);
}

.logo h1 {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
  font-size: 1.5rem !important;
  font-weight: 700 !important;
  color: #1e293b !important;
  margin: 0 !important;
  padding: 0 !important;
  letter-spacing: -0.025em;
  line-height: 1.2;
  display: inline-block;
  visibility: visible !important;
  opacity: 1 !important;
  text-transform: none;
  white-space: nowrap;
}

/* Ensure logo is visible on all screen sizes */
@media (max-width: 768px) {
  .logo h1 {
    font-size: 1.25rem !important;
  }
  
  .logo {
    flex: 1;
    max-width: 60%;
  }
}

@media (min-width: 769px) {
  .logo h1 {
    font-size: 1.75rem !important;
  }
}

/* Logo styles are now in critical CSS for immediate visibility */

/* Navigation Styles */
nav[role="navigation"] {
  display: flex;
  align-items: center;
}

nav[role="navigation"] ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-lg, 1.5rem);
}

nav[role="navigation"] ul[role="menubar"] {
  align-items: center;
}

nav[role="navigation"] li {
  margin: 0;
}

nav[role="navigation"] a {
  display: block;
  padding: var(--space-sm, 0.5rem) var(--space-md, 1rem);
  color: var(--text-secondary, #64748b);
  text-decoration: none;
  font-weight: var(--fw-medium, 500);
  font-size: var(--fs-base, 1rem);
  border-radius: var(--radius-md, 0.375rem);
  transition: all var(--transition-fast, 150ms ease-in-out);
  position: relative;
}

nav[role="navigation"] a:hover,
nav[role="navigation"] a:focus {
  color: var(--primary-600, #2563eb);
  background-color: var(--primary-50, #eff6ff);
  text-decoration: none;
}

nav[role="navigation"] a.active,
nav[role="navigation"] a[aria-current="page"] {
  color: var(--primary-600, #2563eb);
  background-color: var(--primary-100, #dbeafe);
  font-weight: var(--fw-semibold, 600);
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  border-radius: var(--radius-md, 0.375rem);
  transition: all var(--transition-fast, 150ms ease-in-out);
}

.nav-toggle:hover,
.nav-toggle:focus {
  background-color: var(--primary-50, #eff6ff);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary, #212529);
  margin: 3px 0;
  transition: all var(--transition-fast, 150ms ease-in-out);
  border-radius: 1px;
}

.nav-toggle.nav-open span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle.nav-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.nav-open span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  nav[role="navigation"] {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--bg-primary, #ffffff);
    border-top: 1px solid var(--border-light, #e2e8f0);
    box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal, 300ms ease-in-out);
    z-index: 999;
  }
  
  nav[role="navigation"].nav-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  nav[role="navigation"] ul {
    flex-direction: column;
    padding: var(--space-lg, 1.5rem);
    gap: 0;
  }
  
  nav[role="navigation"] li {
    width: 100%;
    border-bottom: 1px solid var(--border-light, #e2e8f0);
  }
  
  nav[role="navigation"] li:last-child {
    border-bottom: none;
  }
  
  nav[role="navigation"] a {
    padding: var(--space-lg, 1.5rem) var(--space-md, 1rem);
    font-size: var(--fs-lg, 1.125rem);
    border-radius: 0;
  }
}

/* Text Utilities */
.text-xs { font-size: var(--fs-xs); }
.text-sm { font-size: var(--fs-sm); }
.text-base { font-size: var(--fs-base); }
.text-lg { font-size: var(--fs-lg); }
.text-xl { font-size: var(--fs-xl); }
.text-2xl { font-size: var(--fs-2xl); }
.text-3xl { font-size: var(--fs-3xl); }
.text-4xl { font-size: var(--fs-4xl); }

.font-light { font-weight: 300; }
.font-normal { font-weight: var(--fw-normal); }
.font-medium { font-weight: var(--fw-medium); }
.font-semibold { font-weight: var(--fw-semibold); }
.font-bold { font-weight: var(--fw-bold); }

.leading-tight { line-height: var(--lh-tight); }
.leading-normal { line-height: var(--lh-normal); }
.leading-relaxed { line-height: var(--lh-relaxed); }

.tracking-tighter { letter-spacing: var(--ls-tighter); }
.tracking-tight { letter-spacing: var(--ls-tight); }
.tracking-normal { letter-spacing: var(--ls-normal); }
.tracking-wide { letter-spacing: var(--ls-wide); }
.tracking-wider { letter-spacing: var(--ls-wider); }
.tracking-widest { letter-spacing: var(--ls-widest); }

/* Enhanced Text Color Utilities */
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-light { color: var(--text-light); }
.text-muted { color: var(--text-muted); }
.text-inverse { color: var(--text-inverse); }

/* Typography Enhancement Utilities */
.text-balance { text-wrap: balance; }
.text-pretty { text-wrap: pretty; }
.text-nowrap { white-space: nowrap; }
.text-truncate { 
  overflow: hidden; 
  text-overflow: ellipsis; 
  white-space: nowrap; 
}

/* Advanced Typography Features */
.font-feature-default { font-feature-settings: "kern" 1, "liga" 1; }
.font-feature-numbers { font-feature-settings: "kern" 1, "liga" 1, "tnum" 1; }
.font-feature-small-caps { font-feature-settings: "kern" 1, "liga" 1, "smcp" 1; }

/* Reading Experience Enhancements */
.reading-optimized {
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Responsive Typography Utilities */
.text-responsive {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  line-height: var(--lh-normal);
}

.text-responsive-lg {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  line-height: var(--lh-relaxed);
}

/* Brand Color Utilities */
.text-brand { color: var(--primary-600); }
.text-brand-light { color: var(--primary-400); }
.text-brand-dark { color: var(--primary-800); }

/* State Color Utilities */
.text-success { color: var(--success-600); }
.text-warning { color: var(--warning-600); }
.text-error { color: var(--error-600); }
.text-info { color: var(--info-600); }

/* Background Color Utilities */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }
.bg-tertiary { background-color: var(--bg-tertiary); }
.bg-accent { background-color: var(--bg-accent); }
.bg-muted { background-color: var(--bg-muted); }

/* Gradient Utilities */
.bg-gradient-primary { background: var(--gradient-primary); }
.bg-gradient-secondary { background: var(--gradient-secondary); }
.bg-gradient-accent { background: var(--gradient-accent); }
.bg-gradient-hero { background: var(--gradient-hero); }
.bg-gradient-card { background: var(--gradient-card); }

/* Border Utilities */
.border-light { border-color: var(--border-light); }
.border-medium { border-color: var(--border-medium); }
.border-dark { border-color: var(--border-dark); }

/* Spacing Utilities */

/* Margin utilities */
.m-0 { margin: 0; }
.m-xs { margin: var(--space-xs); }
.m-sm { margin: var(--space-sm); }
.m-md { margin: var(--space-md); }
.m-lg { margin: var(--space-lg); }
.m-xl { margin: var(--space-xl); }
.m-2xl { margin: var(--space-2xl); }
.m-3xl { margin: var(--space-3xl); }
.m-auto { margin: auto; }

/* Margin top */
.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mt-3xl { margin-top: var(--space-3xl); }

/* Margin bottom */
.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

/* Margin left/right */
.ml-0 { margin-left: 0; }
.ml-auto { margin-left: auto; }
.mr-0 { margin-right: 0; }
.mr-auto { margin-right: auto; }

/* Margin horizontal/vertical */
.mx-auto { margin-left: auto; margin-right: auto; }
.my-0 { margin-top: 0; margin-bottom: 0; }
.my-xs { margin-top: var(--space-xs); margin-bottom: var(--space-xs); }
.my-sm { margin-top: var(--space-sm); margin-bottom: var(--space-sm); }
.my-md { margin-top: var(--space-md); margin-bottom: var(--space-md); }
.my-lg { margin-top: var(--space-lg); margin-bottom: var(--space-lg); }
.my-xl { margin-top: var(--space-xl); margin-bottom: var(--space-xl); }
.my-2xl { margin-top: var(--space-2xl); margin-bottom: var(--space-2xl); }
.my-3xl { margin-top: var(--space-3xl); margin-bottom: var(--space-3xl); }

/* Padding utilities */
.p-0 { padding: 0; }
.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.p-2xl { padding: var(--space-2xl); }
.p-3xl { padding: var(--space-3xl); }

/* Padding top */
.pt-0 { padding-top: 0; }
.pt-xs { padding-top: var(--space-xs); }
.pt-sm { padding-top: var(--space-sm); }
.pt-md { padding-top: var(--space-md); }
.pt-lg { padding-top: var(--space-lg); }
.pt-xl { padding-top: var(--space-xl); }
.pt-2xl { padding-top: var(--space-2xl); }
.pt-3xl { padding-top: var(--space-3xl); }

/* Padding bottom */
.pb-0 { padding-bottom: 0; }
.pb-xs { padding-bottom: var(--space-xs); }
.pb-sm { padding-bottom: var(--space-sm); }
.pb-md { padding-bottom: var(--space-md); }
.pb-lg { padding-bottom: var(--space-lg); }
.pb-xl { padding-bottom: var(--space-xl); }
.pb-2xl { padding-bottom: var(--space-2xl); }
.pb-3xl { padding-bottom: var(--space-3xl); }

/* Padding horizontal/vertical */
.px-0 { padding-left: 0; padding-right: 0; }
.px-xs { padding-left: var(--space-xs); padding-right: var(--space-xs); }
.px-sm { padding-left: var(--space-sm); padding-right: var(--space-sm); }
.px-md { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-lg { padding-left: var(--space-lg); padding-right: var(--space-lg); }
.px-xl { padding-left: var(--space-xl); padding-right: var(--space-xl); }
.px-2xl { padding-left: var(--space-2xl); padding-right: var(--space-2xl); }

.py-0 { padding-top: 0; padding-bottom: 0; }
.py-xs { padding-top: var(--space-xs); padding-bottom: var(--space-xs); }
.py-sm { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-md { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-lg { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.py-xl { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
.py-2xl { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }

/* Layout Utilities */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Width utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-fit { width: fit-content; }

/* Height utilities */
.h-full { height: 100%; }
.h-auto { height: auto; }
.h-fit { height: fit-content; }

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

/* Visual Hierarchy Helpers */
.section-spacing {
  margin: var(--space-3xl) 0;
  padding: var(--space-lg) 0;
}

.content-spacing > * + * {
  margin-top: var(--space-md);
}

.content-spacing-lg > * + * {
  margin-top: var(--space-lg);
}

.content-spacing-xl > * + * {
  margin-top: var(--space-xl);
}

/* Stack layout for consistent vertical spacing */
.stack > * + * {
  margin-top: var(--space-md);
}

.stack-sm > * + * {
  margin-top: var(--space-sm);
}

.stack-lg > * + * {
  margin-top: var(--space-lg);
}

.stack-xl > * + * {
  margin-top: var(--space-xl);
}

/* Cluster layout for horizontal grouping */
.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.cluster-lg {
  gap: var(--space-lg);
}

/* Center layout */
.center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Sidebar layout */
.sidebar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.sidebar > :first-child {
  flex-basis: 250px;
  flex-grow: 1;
}

.sidebar > :last-child {
  flex-basis: 0;
  flex-grow: 999;
  min-width: 50%;
}

/* Enhanced Button System with Cross-Browser Support */
.btn {
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  padding: var(--space-md, 1rem) var(--space-xl, 2rem);
  font-family: var(--font-primary, 'Inter', -apple-system, BlinkMacSystemFont, sans-serif);
  font-size: var(--fs-base, 1rem);
  font-weight: var(--fw-semibold, 600);
  line-height: 1;
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  /* Cross-browser user-select */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  border: 2px solid transparent;
  /* Cross-browser border-radius */
  border-radius: var(--radius-lg, 0.5rem);
  -webkit-border-radius: var(--radius-lg, 0.5rem);
  -moz-border-radius: var(--radius-lg, 0.5rem);
  /* Cross-browser transitions */
  -webkit-transition: all var(--transition-normal, 300ms ease-in-out);
  -moz-transition: all var(--transition-normal, 300ms ease-in-out);
  -o-transition: all var(--transition-normal, 300ms ease-in-out);
  transition: all var(--transition-normal, 300ms ease-in-out);
  position: relative;
  overflow: hidden;
  min-width: 120px;
  letter-spacing: var(--ls-normal, 0em);
  /* Touch optimization */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.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-slow);
}

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

/* Primary Button */
.btn-primary,
.btn {
  background: var(--gradient-primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover,
.btn:hover {
  background: var(--gradient-primary-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--text-inverse);
}

.btn-primary:active,
.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Secondary Button */
.btn-secondary {
  background: var(--bg-primary);
  color: var(--primary-600);
  border-color: var(--primary-600);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--primary-50);
  color: var(--primary-700);
  border-color: var(--primary-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Outline Button */
.btn-outline {
  background: transparent;
  color: var(--primary-600);
  border-color: var(--primary-600);
}

.btn-outline:hover {
  background: var(--primary-600);
  color: var(--text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--bg-secondary);
  color: var(--primary-600);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--fs-sm);
  min-width: 100px;
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--fs-lg);
  min-width: 160px;
}

/* Button States */
.btn:disabled,
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn:focus {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

/* Enhanced Card System with Cross-Browser Support */
.card {
  background: var(--gradient-card, linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%));
  border: 1px solid var(--border-light, #e2e8f0);
  /* Cross-browser border-radius */
  border-radius: var(--radius-xl, 0.75rem);
  -webkit-border-radius: var(--radius-xl, 0.75rem);
  -moz-border-radius: var(--radius-xl, 0.75rem);
  padding: var(--space-xl, 2rem);
  /* Cross-browser box-shadow */
  box-shadow: var(--shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06));
  -webkit-box-shadow: var(--shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06));
  -moz-box-shadow: var(--shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06));
  /* Cross-browser transitions */
  -webkit-transition: all var(--transition-normal, 300ms ease-in-out);
  -moz-transition: all var(--transition-normal, 300ms ease-in-out);
  -o-transition: all var(--transition-normal, 300ms ease-in-out);
  transition: all var(--transition-normal, 300ms ease-in-out);
  position: relative;
  overflow: hidden;
  /* Performance optimization */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  will-change: transform;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  background: var(--gradient-card-hover);
  border-color: var(--primary-200);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
}

.card-subtitle {
  margin: 0;
  font-size: var(--fs-base);
  color: var(--text-secondary);
  font-weight: var(--fw-normal);
}

.card-body {
  margin-bottom: var(--space-lg);
}

.card-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
}

/* Enhanced Service Cards */
.service-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  background: var(--gradient-card-hover);
  border-color: var(--primary-200);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card i {
  font-size: 3rem;
  color: var(--primary-600);
  margin-bottom: var(--space-lg);
  display: block;
  transition: all var(--transition-normal);
}

.service-card:hover i {
  color: var(--primary-700);
  transform: scale(1.1);
}

.service-card h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
}

.service-card p {
  color: var(--text-secondary);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  margin: 0;
}

/* Enhanced Table Styling */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.data-table thead {
  background: var(--gradient-primary);
  color: var(--text-inverse);
}

.data-table th,
.data-table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.data-table th {
  font-weight: var(--fw-semibold);
  font-size: var(--fs-base);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

.data-table tbody tr {
  transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
  background-color: var(--primary-50);
}

.data-table tbody tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

.data-table tbody tr:nth-child(even):hover {
  background-color: var(--primary-100);
}

/* Enhanced Statistics Grid with Fallbacks */
.stats-grid {
  /* Fallback for older browsers */
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin: var(--space-xl, 2rem) 0;
}

/* Modern grid support */
@supports (display: grid) {
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl, 2rem);
    -ms-flex-wrap: initial;
    flex-wrap: initial;
  }
}

/* Flexbox fallback for grid items */
.stats-grid > * {
  -webkit-box-flex: 1;
  -ms-flex: 1 1 200px;
  flex: 1 1 200px;
  margin: var(--space-sm, 0.5rem);
}

@supports (display: grid) {
  .stats-grid > * {
    -webkit-box-flex: initial;
    -ms-flex: initial;
    flex: initial;
    margin: 0;
  }
}

.stat-item {
  text-align: center;
  padding: var(--space-xl);
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  background: var(--gradient-card-hover);
}

.stat-item:hover::before {
  transform: scaleX(1);
}

.stat-item h4 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
  color: var(--primary-600);
  margin: 0 0 var(--space-sm) 0;
  line-height: 1;
}

.stat-item p {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  margin: 0;
  line-height: var(--lh-normal);
}

/* Enhanced Callout Boxes */
.callout {
  background: var(--gradient-card);
  border: 1px solid var(--border-medium);
  border-left: 4px solid var(--primary-600);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  position: relative;
}

.callout::before {
  content: '';
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  width: 24px;
  height: 24px;
  background: var(--primary-600);
  border-radius: 50%;
  opacity: 0.1;
}

.callout h4 {
  color: var(--primary-700);
  margin-bottom: var(--space-md);
  font-weight: var(--fw-semibold);
}

.callout p {
  margin: 0;
  color: var(--text-secondary);
  line-height: var(--lh-normal);
}

/* Expert Tips Styling */
.expert-tips {
  background: linear-gradient(135deg, var(--success-50) 0%, var(--success-100) 100%);
  border: 1px solid var(--success-200);
  border-left: 4px solid var(--success-600);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
}

.expert-tips h4 {
  color: var(--success-700);
  margin-bottom: var(--space-md);
  font-weight: var(--fw-semibold);
  display: flex;
  align-items: center;
}

.expert-tips h4::before {
  content: '💡';
  margin-right: var(--space-sm);
  font-size: 1.2em;
}

.expert-tips ul {
  margin: 0;
  padding-left: var(--space-lg);
}

.expert-tips li {
  color: var(--success-800);
  margin-bottom: var(--space-sm);
  line-height: var(--lh-normal);
}

/* FAQ Styling */
.faq-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  transition: all var(--transition-normal);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-200);
}

.faq-item h4 {
  color: var(--primary-700);
  margin-bottom: var(--space-md);
  font-weight: var(--fw-semibold);
}

.faq-item p {
  margin: 0;
  color: var(--text-secondary);
  line-height: var(--lh-normal);
}

/* Screen Reader Only Class for 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;
}

/* Enhanced Form System */
.form-group {
  margin-bottom: var(--space-lg);
  position: relative;
}

.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: var(--ls-normal);
  line-height: var(--lh-tight);
}

.form-group label::after {
  content: ' *';
  color: var(--error-500);
  font-weight: var(--fw-bold);
  margin-left: var(--space-xs);
}

.form-group label[for="phone"]::after,
.form-group label[for="service"]::after {
  display: none;
}

/* Enhanced Input Styling */
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-normal);
  line-height: var(--lh-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-light);
  font-style: italic;
  opacity: 0.8;
}

/* Enhanced Focus States */
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100), var(--shadow-md);
  background: var(--primary-25);
  transform: translateY(-1px);
}

/* Enhanced Hover States */
.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-md);
  background: var(--primary-25);
}

/* Valid State Styling */
.form-group input:valid:not(:placeholder-shown),
.form-group textarea:valid:not(:placeholder-shown),
.form-group select:valid {
  border-color: var(--success-500);
  background: var(--success-25);
}

.form-group input:valid:not(:placeholder-shown):focus,
.form-group textarea:valid:not(:placeholder-shown):focus,
.form-group select:valid:focus {
  box-shadow: 0 0 0 3px var(--success-100), var(--shadow-md);
}

/* Error State Styling */
.form-group input.error,
.form-group textarea.error,
.form-group select.error {
  border-color: var(--error-500);
  background: var(--error-25);
  box-shadow: 0 0 0 3px var(--error-100), var(--shadow-md);
}

.form-group input.error:focus,
.form-group textarea.error:focus,
.form-group select.error:focus {
  box-shadow: 0 0 0 3px var(--error-200), var(--shadow-md);
}

/* Enhanced Textarea Styling */
.form-group textarea {
  resize: vertical;
  min-height: 120px;
  font-family: var(--font-primary);
  line-height: var(--lh-relaxed);
}

/* Enhanced Select Styling */
.form-group select {
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right var(--space-lg) center;
  background-size: 16px;
  padding-right: calc(var(--space-lg) * 2.5);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.form-group select:focus {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232563eb' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e");
}

/* Form Button Enhancement */
.form-group .btn,
form .btn {
  margin-top: var(--space-lg);
  min-width: 160px;
  font-size: var(--fs-lg);
  padding: var(--space-lg) var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.form-group .btn::before,
form .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left var(--transition-slow);
}

.form-group .btn:hover::before,
form .btn:hover::before {
  left: 100%;
}

/* Enhanced Contact Form Layout */
.contact-form {
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.contact-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.contact-form h2 {
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  font-size: var(--fs-3xl);
  font-weight: var(--fw-bold);
  text-align: center;
}

.contact-form > p {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--space-xl);
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
}

/* Form Grid Layout for Better Organization */
.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
  
  .form-row .form-group:last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}

/* Form Validation Messages */
.form-group .error-message {
  display: none;
  color: var(--error-600);
  font-size: var(--fs-sm);
  margin-top: var(--space-xs);
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
}

.form-group.has-error .error-message {
  display: block;
  animation: slideDown var(--transition-normal) ease-out;
}

.form-group .success-message {
  display: none;
  color: var(--success-600);
  font-size: var(--fs-sm);
  margin-top: var(--space-xs);
  font-weight: var(--fw-medium);
  line-height: var(--lh-tight);
}

.form-group.has-success .success-message {
  display: block;
  animation: slideDown var(--transition-normal) ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Form Loading State */
.form-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.7;
}

.form-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 32px;
  margin: -16px 0 0 -16px;
  border: 3px solid var(--primary-200);
  border-top-color: var(--primary-600);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  z-index: 10;
}

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

/* Form Success State */
.form-success {
  background: var(--gradient-success);
  color: var(--text-inverse);
  text-align: center;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  margin-top: var(--space-lg);
  box-shadow: var(--shadow-md);
}

.form-success h3 {
  color: var(--text-inverse);
  margin-bottom: var(--space-md);
  font-size: var(--fs-xl);
}

.form-success p {
  color: var(--text-inverse);
  margin: 0;
  font-size: var(--fs-base);
  opacity: 0.9;
}

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

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

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

/* Enhanced Header and Navigation System */
header[role="banner"] {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  transition: all var(--transition-normal);
  height: 80px;
  display: flex;
  align-items: center;
}

header[role="banner"]::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: var(--gradient-hero);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

header[role="banner"]:hover::before {
  opacity: 0.05;
}

/* Header Container */
header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 100%;
}

/* Enhanced Logo Styling */
.logo {
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
  position: relative;
}

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

.logo h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: var(--fw-bold);
  color: var(--primary-700);
  margin: 0;
  line-height: 1;
  letter-spacing: var(--ls-tight);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  text-decoration: none;
  cursor: pointer;
}

.logo h1::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.logo:hover h1::after {
  width: 100%;
}

/* Enhanced Navigation Styling */
nav[role="navigation"] {
  display: flex;
  align-items: center;
  height: 100%;
}

nav[role="navigation"] ul {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-xs);
}

nav[role="navigation"] li {
  position: relative;
}

nav[role="navigation"] a {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  letter-spacing: var(--ls-normal);
  line-height: 1;
}

nav[role="navigation"] a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary-soft);
  transition: left var(--transition-normal);
  z-index: -1;
}

nav[role="navigation"] a:hover {
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

nav[role="navigation"] a:hover::before {
  left: 0;
}

nav[role="navigation"] a:focus {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

/* Active Navigation State */
nav[role="navigation"] a.active,
nav[role="navigation"] a[aria-current="page"] {
  background: var(--gradient-primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-md);
  font-weight: var(--fw-semibold);
}

nav[role="navigation"] a.active::before,
nav[role="navigation"] a[aria-current="page"]::before {
  left: 0;
  background: rgba(255, 255, 255, 0.1);
}

nav[role="navigation"] a.active:hover,
nav[role="navigation"] a[aria-current="page"]:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Mobile Navigation Toggle (Hidden by default, shown on mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.nav-toggle:hover {
  background: var(--primary-50);
}

.nav-toggle:focus {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary-600);
  margin: 3px 0;
  transition: all var(--transition-normal);
  border-radius: 1px;
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
  header[role="banner"] {
    height: 70px;
  }
  
  .logo h1 {
    font-size: clamp(1.25rem, 4vw, 1.5rem);
  }
  
  .nav-toggle {
    display: flex;
  }
  
  nav[role="navigation"] {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
  }
  
  nav[role="navigation"].nav-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  nav[role="navigation"] ul {
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-sm);
    width: 100%;
  }
  
  nav[role="navigation"] li {
    width: 100%;
  }
  
  nav[role="navigation"] a {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    justify-content: center;
    font-size: var(--fs-lg);
    border-radius: var(--radius-md);
  }
  
  /* Mobile Navigation Toggle Animation */
  .nav-toggle.nav-open span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }
  
  .nav-toggle.nav-open span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.nav-open span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
}

/* Tablet Navigation Adjustments */
@media (min-width: 769px) and (max-width: 1024px) {
  nav[role="navigation"] ul {
    gap: var(--space-xs);
  }
  
  nav[role="navigation"] a {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--fs-sm);
  }
}

/* Large Screen Navigation Enhancements */
@media (min-width: 1025px) {
  nav[role="navigation"] ul {
    gap: var(--space-sm);
  }
  
  nav[role="navigation"] a {
    padding: var(--space-sm) var(--space-xl);
    font-size: var(--fs-base);
  }
  
  /* Enhanced hover effects for larger screens */
  nav[role="navigation"] a:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
  }
  
  .logo:hover {
    transform: translateY(-2px);
  }
}

/* Header Scroll Behavior */
.header-scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
  height: 70px;
}

.header-scrolled .logo h1 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-600);
  color: var(--text-inverse);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--fw-semibold);
  z-index: 1001;
  transition: top var(--transition-normal);
}

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

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  header[role="banner"] {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--text-primary);
  }
  
  nav[role="navigation"] a {
    border: 1px solid transparent;
  }
  
  nav[role="navigation"] a:hover,
  nav[role="navigation"] a:focus {
    border-color: var(--text-primary);
  }
  
  nav[role="navigation"] a.active,
  nav[role="navigation"] a[aria-current="page"] {
    border-color: var(--primary-600);
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  header[role="banner"],
  .logo,
  nav[role="navigation"] a,
  .nav-toggle,
  .nav-toggle span {
    transition: none;
  }
  
  nav[role="navigation"] a:hover,
  .logo:hover {
    transform: none;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  header[role="banner"] {
    background: rgba(15, 23, 42, 0.95);
    border-bottom-color: var(--secondary-700);
  }
  
  .logo h1 {
    color: var(--primary-400);
  }
  
  nav[role="navigation"] a {
    color: var(--secondary-200);
  }
  
  nav[role="navigation"] a:hover {
    color: var(--text-inverse);
  }
  
  .nav-toggle span {
    background: var(--primary-400);
  }
  
  @media (max-width: 768px) {
    nav[role="navigation"] {
      background: rgba(15, 23, 42, 0.98);
      border-bottom-color: var(--secondary-700);
    }
  }
}

/* Print Styles */
@media print {
  header[role="banner"] {
    position: static;
    background: transparent;
    box-shadow: none;
    border-bottom: 1px solid var(--text-primary);
  }
  
  nav[role="navigation"] {
    display: none;
  }
  
  .skip-link {
    display: none;
  }
}

/* Container Variants */
.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-xl {
  max-width: var(--container-xl);
}

.container-fluid {
  max-width: none;
  width: 100%;
}

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

.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
.grid-cols-6 { grid-template-columns: repeat(6, 1fr); }

/* Auto-fit grid for responsive layouts */
.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

/* Grid gap utilities */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }
.gap-3xl { gap: var(--space-3xl); }

/* Column gap utilities */
.gap-x-xs { column-gap: var(--space-xs); }
.gap-x-sm { column-gap: var(--space-sm); }
.gap-x-md { column-gap: var(--space-md); }
.gap-x-lg { column-gap: var(--space-lg); }
.gap-x-xl { column-gap: var(--space-xl); }
.gap-x-2xl { column-gap: var(--space-2xl); }

/* Row gap utilities */
.gap-y-xs { row-gap: var(--space-xs); }
.gap-y-sm { row-gap: var(--space-sm); }
.gap-y-md { row-gap: var(--space-md); }
.gap-y-lg { row-gap: var(--space-lg); }
.gap-y-xl { row-gap: var(--space-xl); }
.gap-y-2xl { row-gap: var(--space-2xl); }

/* Grid span utilities */
.col-span-1 { grid-column: span 1; }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-full { grid-column: 1 / -1; }

.row-span-1 { grid-row: span 1; }
.row-span-2 { grid-row: span 2; }
.row-span-3 { grid-row: span 3; }
.row-span-4 { grid-row: span 4; }

/* Enhanced Flexbox System */
.flex {
  display: flex;
}

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

.flex-row {
  flex-direction: row;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

/* Flex alignment utilities */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }
.items-baseline { align-items: baseline; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

.content-start { align-content: flex-start; }
.content-center { align-content: center; }
.content-end { align-content: flex-end; }
.content-between { align-content: space-between; }
.content-around { align-content: space-around; }
.content-evenly { align-content: space-evenly; }

/* Flex grow/shrink utilities */
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }

.grow { flex-grow: 1; }
.grow-0 { flex-grow: 0; }
.shrink { flex-shrink: 1; }
.shrink-0 { flex-shrink: 0; }

/* Enhanced Layout Components */

/* Section Layout System */
.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section-sm {
  padding: var(--space-xl) 0;
}

.section-lg {
  padding: var(--space-3xl) 0 calc(var(--space-3xl) * 1.5) 0;
}

.section-xl {
  padding: calc(var(--space-3xl) * 1.5) 0 calc(var(--space-3xl) * 2) 0;
}

/* Section spacing variants */
.section-tight {
  padding: var(--space-lg) 0;
}

.section-loose {
  padding: calc(var(--space-3xl) * 2) 0;
}

/* Content Layout Patterns */

/* Two-column layout */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

/* Three-column layout */
.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  align-items: start;
}

/* Sidebar layout */
.sidebar-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.sidebar-layout.sidebar-right {
  grid-template-columns: 1fr 300px;
}

/* Hero layout */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  min-height: 60vh;
}

/* Card grid layouts */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.card-grid-sm {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.card-grid-lg {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-2xl);
}

/* Services grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-2xl) 0;
}

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

/* Testimonial grid */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

/* Enhanced Visual Hierarchy System */

/* Content spacing patterns */
.content-flow > * + * {
  margin-top: var(--space-md);
}

.content-flow-sm > * + * {
  margin-top: var(--space-sm);
}

.content-flow-lg > * + * {
  margin-top: var(--space-lg);
}

.content-flow-xl > * + * {
  margin-top: var(--space-xl);
}

/* Section header spacing */
.section-header {
  margin-bottom: var(--space-2xl);
  text-align: center;
}

.section-header h2 {
  margin-bottom: var(--space-md);
}

.section-header p {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Content blocks with consistent spacing */
.content-block {
  margin: var(--space-2xl) 0;
}

.content-block-sm {
  margin: var(--space-lg) 0;
}

.content-block-lg {
  margin: var(--space-3xl) 0;
}

/* List spacing improvements */
ul, ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
}

li {
  margin-bottom: var(--space-sm);
  line-height: var(--lh-relaxed);
}

li:last-child {
  margin-bottom: 0;
}

/* Nested list spacing */
li ul, li ol {
  margin-top: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Enhanced Table Spacing */
.data-table {
  margin: var(--space-xl) 0;
  border-spacing: 0;
}

.data-table th,
.data-table td {
  padding: var(--space-md) var(--space-lg);
  vertical-align: top;
}

.data-table th {
  padding-bottom: var(--space-lg);
}

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

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--fw-medium);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
}

/* Enhanced Responsive Breakpoints */
@media (max-width: 640px) {
  .container {
    padding: 0 var(--space-md);
  }
  
  .section {
    padding: var(--space-xl) 0;
  }
  
  .section-lg {
    padding: var(--space-2xl) 0;
  }
  
  .two-column,
  .three-column,
  .sidebar-layout,
  .hero-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }
  
  .testimonial-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (min-width: 641px) and (max-width: 768px) {
  .three-column {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .sidebar-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Enhanced Tablet Responsive Behavior (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
  /* Container optimizations for tablet */
  .container {
    padding: 0 var(--space-xl);
    max-width: 90%;
  }
  
  /* Section spacing optimizations */
  .section {
    padding: var(--space-2xl) 0 var(--space-3xl) 0;
  }
  
  .section-lg {
    padding: var(--space-3xl) 0 calc(var(--space-3xl) * 1.25) 0;
  }
  
  /* Layout optimizations */
  .hero-layout {
    gap: var(--space-xl);
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
  }
  
  .two-column {
    gap: var(--space-xl);
    grid-template-columns: 1fr 1fr;
  }
  
  .three-column {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
  }
  
  .sidebar-layout {
    grid-template-columns: 280px 1fr;
    gap: var(--space-xl);
  }
  
  /* Grid optimizations */
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
  
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
  
  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
  
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
  
  /* Typography adjustments for tablet */
  h1 {
    font-size: clamp(2.25rem, 4vw + 0.5rem, 3rem);
  }
  
  h2 {
    font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem);
  }
  
  h3 {
    font-size: clamp(1.5rem, 2.5vw + 0.25rem, 2rem);
  }
  
  /* Enhanced button sizing for tablet */
  .btn {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--fs-lg);
    min-width: 140px;
  }
  
  .btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--fs-xl);
    min-width: 180px;
  }
  
  /* Table optimizations for tablet */
  .data-table {
    font-size: var(--fs-base);
  }
  
  .data-table th,
  .data-table td {
    padding: var(--space-md) var(--space-lg);
  }
  
  /* Card optimizations */
  .service-card {
    padding: var(--space-xl) var(--space-lg);
  }
  
  .service-card i {
    font-size: 3.5rem;
    margin-bottom: var(--space-xl);
  }
  
  /* Enhanced hover effects for tablet */
  .service-card:hover {
    transform: translateY(-8px);
  }
  
  .card:hover {
    transform: translateY(-6px);
  }
  
  .stat-item:hover {
    transform: translateY(-6px);
  }
}

/* Enhanced Desktop Responsive Behavior (1025px+) */
@media (min-width: 1025px) {
  /* Container optimizations for desktop */
  .container {
    padding: 0 var(--space-2xl);
    max-width: var(--container-max);
  }
  
  /* Large container variant for wide screens */
  .container-wide {
    max-width: 1400px;
  }
  
  /* Section spacing optimizations */
  .section {
    padding: var(--space-3xl) 0 calc(var(--space-3xl) * 1.5) 0;
  }
  
  .section-lg {
    padding: calc(var(--space-3xl) * 1.5) 0 calc(var(--space-3xl) * 2) 0;
  }
  
  .section-xl {
    padding: calc(var(--space-3xl) * 2) 0 calc(var(--space-3xl) * 2.5) 0;
  }
  
  /* Layout optimizations */
  .hero-layout {
    gap: var(--space-2xl);
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
    min-height: 70vh;
  }
  
  .two-column {
    gap: var(--space-2xl);
    grid-template-columns: 1fr 1fr;
  }
  
  .three-column {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
  }
  
  .sidebar-layout {
    grid-template-columns: 320px 1fr;
    gap: var(--space-2xl);
  }
  
  /* Grid optimizations */
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
  }
  
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
  }
  
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
  }
  
  .testimonial-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2xl);
  }
  
  /* Typography optimizations for desktop */
  h1 {
    font-size: clamp(2.5rem, 4vw + 1rem, 4rem);
    line-height: 1.1;
  }
  
  h2 {
    font-size: clamp(2rem, 3vw + 1rem, 3.25rem);
    line-height: 1.15;
  }
  
  h3 {
    font-size: clamp(1.5rem, 2vw + 1rem, 2.5rem);
    line-height: 1.2;
  }
  
  /* Enhanced button sizing for desktop */
  .btn {
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--fs-lg);
    min-width: 160px;
  }
  
  .btn-lg {
    padding: var(--space-xl) calc(var(--space-2xl) * 1.5);
    font-size: var(--fs-xl);
    min-width: 200px;
  }
  
  /* Enhanced hover effects for desktop */
  .service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  }
  
  .card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  }
  
  .stat-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  }
  
  /* Enhanced navigation for desktop */
  nav[role="navigation"] ul {
    gap: var(--space-md);
  }
  
  nav[role="navigation"] a {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--fs-base);
  }
  
  /* Table optimizations for desktop */
  .data-table {
    font-size: var(--fs-base);
    margin: var(--space-2xl) 0;
  }
  
  .data-table th,
  .data-table td {
    padding: var(--space-lg) var(--space-xl);
  }
  
  /* Card optimizations */
  .service-card {
    padding: var(--space-2xl);
  }
  
  .service-card i {
    font-size: 4rem;
    margin-bottom: var(--space-xl);
  }
  
  /* Enhanced visual effects for desktop */
  .service-card::before {
    height: 6px;
  }
  
  .card::before {
    height: 6px;
  }
  
  /* Content width optimizations */
  .section-header p {
    max-width: 700px;
    font-size: var(--fs-xl);
  }
  
  /* Enhanced spacing for desktop */
  .content-flow-xl > * + * {
    margin-top: var(--space-2xl);
  }
  
  .section-header {
    margin-bottom: var(--space-3xl);
  }
}

/* Ultra-wide Desktop Optimizations (1400px+) */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
    padding: 0 var(--space-3xl);
  }
  
  .hero-layout {
    gap: var(--space-3xl);
    min-height: 75vh;
  }
  
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
  }
  
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-2xl);
  }
  
  .section {
    padding: calc(var(--space-3xl) * 1.5) 0 calc(var(--space-3xl) * 2) 0;
  }
  
  .section-lg {
    padding: calc(var(--space-3xl) * 2) 0 calc(var(--space-3xl) * 2.5) 0;
  }
}

/* Enhanced Alignment System */
.align-start { align-items: flex-start; }
.align-center { align-items: center; }
.align-end { align-items: flex-end; }
.align-stretch { align-items: stretch; }

.self-start { align-self: flex-start; }
.self-center { align-self: center; }
.self-end { align-self: flex-end; }
.self-stretch { align-self: stretch; }

/* Content alignment */
.content-left { text-align: left; }
.content-center { text-align: center; }
.content-right { text-align: right; }

/* Enhanced Visual Separation */
.divider {
  height: 1px;
  background: var(--border-light);
  margin: var(--space-xl) 0;
  border: none;
}

.divider-thick {
  height: 2px;
  background: var(--border-medium);
}

.divider-dashed {
  background: none;
  border-top: 1px dashed var(--border-medium);
  height: 0;
}

/* Section dividers */
.section-divider {
  margin: var(--space-3xl) 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-light), transparent);
}

/* Enhanced Spacing Utilities for Specific Components */

/* Header spacing */
header {
  margin-bottom: var(--space-lg);
}

/* Footer spacing */
footer {
  margin-top: var(--space-3xl);
  padding: var(--space-2xl) 0 var(--space-lg) 0;
}

/* Navigation spacing */
nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

nav li {
  margin: 0;
}

/* Button group spacing */
.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.btn-group-sm {
  gap: var(--space-sm);
}

.btn-group-lg {
  gap: var(--space-lg);
}

/* Enhanced Content Organization */

/* Article spacing */
article {
  margin: var(--space-2xl) 0;
}

article header {
  margin-bottom: var(--space-lg);
}

article footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
}

/* Aside spacing */
aside {
  margin: var(--space-xl) 0;
}

/* Figure spacing */
figure {
  margin: var(--space-xl) 0;
}

figcaption {
  margin-top: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  text-align: center;
}

/* Blockquote spacing */
blockquote {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  border-left: 4px solid var(--primary-600);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

blockquote p {
  margin: 0;
  font-style: italic;
  font-size: var(--fs-lg);
}

blockquote cite {
  display: block;
  margin-top: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  font-style: normal;
}

/* Enhanced Responsive Container Padding */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-sm);
  }
  
  .section {
    padding: var(--space-lg) 0;
  }
}

@media (min-width: 1200px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

/* Layout debugging utilities (remove in production) */
.debug * {
  outline: 1px solid red;
}

.debug-grid {
  background-image: 
    linear-gradient(rgba(255, 0, 0, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 0, 0, 0.1) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* Container Variants */
.container-sm {
  max-width: var(--container-sm);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-md {
  max-width: var(--container-md);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-lg {
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-xl {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--space-md);
}

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

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Auto-fit grids for responsive layouts */
.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-auto-fit-sm {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.grid-auto-fit-lg {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* Grid gaps */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }
.gap-3xl { gap: var(--space-3xl); }

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

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

.flex-row {
  flex-direction: row;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

/* Flex alignment */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

/* Flex grow/shrink */
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }

/* Responsive Container Adjustments */
@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-lg);
  }
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-2xl);
  }
}

.container header {
    position: relative;
    box-shadow: none;
    margin: var(--space-lg) 0;
}

.container header h1 {
    /* Uses global h1 styles with fluid sizing */
    margin-bottom: var(--space-sm);
}

.container header p {
    /* Uses lead text styling for better hierarchy */
    font-size: clamp(1.125rem, 1.5vw + 0.5rem, var(--fs-xl));
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    line-height: var(--lh-relaxed);
    font-weight: var(--fw-normal);
}

section {
    margin: var(--space-3xl) 0;
    padding: var(--space-lg) 0;
    position: relative;
}

/* Enhanced Hero Section */
.hero {
    padding: var(--space-3xl) 0;
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    margin: var(--space-2xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::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="50" cy="50" r="1" fill="%23ffffff" opacity="0.05"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero h2 {
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: var(--fw-bold);
    line-height: 1.1;
    letter-spacing: var(--ls-tight);
}

.hero p {
    color: var(--text-secondary);
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--space-xl);
}

/* Enhanced section layouts */
.section-hero {
    padding: var(--space-3xl) 0;
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    margin: var(--space-2xl) 0;
    position: relative;
    overflow: hidden;
}

.section-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary-300) 50%, transparent 100%);
}

.section-content {
    padding: var(--space-2xl) 0;
    position: relative;
}

.section-feature {
    padding: var(--space-xl) 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin: var(--space-lg) 0;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.section-feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
    opacity: 0.7;
}

/* Services Grid Enhancement */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.services-highlight {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.services-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary-200) 50%, transparent 100%);
}

.services-cta {
    text-align: center;
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-light);
}

/* About Preview Section */
.about-preview {
    padding: var(--space-3xl) 0;
    background: var(--bg-primary);
    position: relative;
}

.about-preview .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-content {
    padding: var(--space-lg);
}

.about-image {
    position: relative;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0.1;
    z-index: -1;
}

/* Testimonials Section */
.testimonials {
    padding: var(--space-3xl) 0;
    background: linear-gradient(135deg, var(--secondary-50) 0%, var(--primary-50) 100%);
    position: relative;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary-300) 50%, transparent 100%);
}

.testimonial {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-200);
}

.testimonial-image img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid var(--primary-200);
    transition: border-color var(--transition-normal);
}

.testimonial:hover .testimonial-image img {
    border-color: var(--primary-400);
}

.testimonial blockquote {
    margin: 0;
    font-style: italic;
    color: var(--text-secondary);
    line-height: var(--lh-relaxed);
}

.testimonial cite h4 {
    color: var(--primary-700);
    margin: var(--space-sm) 0 0 0;
    font-weight: var(--fw-semibold);
}

/* CTA Section */
.cta {
    padding: var(--space-3xl) 0;
    background: var(--gradient-primary);
    color: var(--text-inverse);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::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="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    pointer-events: none;
}

.cta h2 {
    color: var(--text-inverse);
    margin-bottom: var(--space-lg);
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--fs-lg);
    margin-bottom: var(--space-xl);
}

.cta .btn {
    background: var(--bg-primary);
    color: var(--primary-600);
    border: 2px solid var(--bg-primary);
}

.cta .btn:hover {
    background: transparent;
    color: var(--text-inverse);
    border-color: var(--text-inverse);
}

section h2 {
    /* Uses global h2 styles with fluid sizing */
    margin-bottom: var(--space-lg);
}

section p {
    /* Enhanced paragraph styling with better readability */
    color: var(--text-secondary);
    font-size: clamp(1rem, 1vw + 0.5rem, var(--fs-lg));
    margin-bottom: var(--space-md);
    line-height: var(--lh-normal);
    letter-spacing: var(--ls-normal);
}

section ul {
    list-style-type: disc;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-lg);
}

section ul li {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: clamp(1rem, 1vw + 0.5rem, var(--fs-lg));
    line-height: var(--lh-normal);
    letter-spacing: var(--ls-normal);
}

section strong {
    color: var(--text-primary);
    font-weight: var(--fw-semibold);
}

header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    padding: var(--space-md) 0;
}

.logo h1 {
    margin: 0;
    font-family: var(--font-heading), 'Poppins Fallback', system-ui, -apple-system, sans-serif;
    font-size: clamp(1.25rem, 2vw + 0.5rem, var(--fs-2xl));
    font-weight: var(--fw-bold);
    color: var(--text-primary);
    line-height: var(--lh-tight);
    letter-spacing: var(--ls-tight);
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--space-xl);
}

nav ul li a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: var(--fw-medium);
    font-size: var(--fs-base);
    letter-spacing: var(--ls-normal);
    padding: var(--space-sm) 0;
    position: relative;
    transition: color var(--transition-normal);
    font-family: var(--font-primary), 'Inter Fallback', system-ui, -apple-system, sans-serif;
}

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

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: width var(--transition-normal);
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

.nlp-term {
    margin-bottom: var(--space-lg);
}

.nlp-term p {
    color: var(--text-secondary);
    font-size: var(--fs-lg);
    line-height: var(--lh-normal);
}

footer {
    background: linear-gradient(135deg, var(--secondary-900) 0%, var(--secondary-800) 100%);
    color: var(--text-inverse);
    padding: var(--space-3xl) 0;
    margin-top: var(--space-3xl);
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, var(--primary-400) 50%, transparent 100%);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    align-items: start;
    text-align: left;
}

.footer-content h3 {
    font-family: var(--font-heading), 'Poppins Fallback', system-ui, -apple-system, sans-serif;
    color: var(--text-inverse);
    margin-bottom: var(--space-lg);
    font-size: var(--fs-xl);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-normal);
    line-height: var(--lh-tight);
}

.footer-content p,
.footer-content ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer-content ul li {
    margin-bottom: var(--space-sm);
}

.footer-content ul li a {
    color: var(--secondary-300);
    text-decoration: none;
    font-size: var(--fs-base);
    letter-spacing: var(--ls-normal);
    line-height: var(--lh-normal);
    transition: all var(--transition-normal);
    font-family: var(--font-primary), 'Inter Fallback', system-ui, -apple-system, sans-serif;
    position: relative;
}

.footer-content ul li a:hover {
    color: var(--primary-300);
    transform: translateX(4px);
}
/* R
esponsive Design System */

/* Mobile First - Base styles above are mobile */

/* Small devices (landscape phones, 640px and up) */
@media (min-width: 640px) {
  html {
    font-size: 17px;
  }
  
  /* Enhanced typography for small tablets */
  body {
    line-height: 1.6;
  }
  
  /* Typography scales naturally with fluid sizing */
  nav ul {
    gap: var(--space-2xl);
  }
  
  /* Enhanced letter spacing for larger screens */
  h1, h2, h3 {
    letter-spacing: var(--ls-tight);
  }
  
  /* Improved paragraph spacing for better readability */
  p {
    margin-bottom: var(--space-lg);
  }
  
  /* Enhanced lead text for tablets */
  .lead {
    font-size: clamp(1.25rem, 2vw + 0.5rem, 1.5rem);
    line-height: 1.7;
  }
  
  /* Responsive grid utilities */
  .grid-sm-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-sm-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  
  /* Responsive spacing adjustments */
  .section-spacing {
    padding: var(--space-xl) 0;
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  html {
    font-size: 18px;
  }
  
  body {
    padding-top: 90px;
    line-height: 1.65;
  }
  
  header .container {
    height: 90px;
  }
  
  /* Enhanced navigation typography for tablets */
  nav ul li a {
    font-size: var(--fs-lg);
    letter-spacing: var(--ls-normal);
    font-weight: var(--fw-medium);
  }
  
  section {
    margin: var(--space-3xl) 0;
    padding: var(--space-2xl) 0;
  }
  
  /* Enhanced typography for better readability on tablets */
  h1 {
    line-height: 1.05;
    margin-bottom: var(--space-xl);
  }
  
  h2 {
    line-height: 1.1;
    margin-bottom: var(--space-xl);
  }
  
  h3 {
    line-height: 1.2;
    margin-bottom: var(--space-lg);
  }
  
  /* Better line height for larger screens */
  p {
    line-height: var(--lh-relaxed);
    margin-bottom: var(--space-lg);
  }
  
  .lead {
    line-height: 1.75;
    font-size: clamp(1.375rem, 2.5vw + 0.5rem, 1.625rem);
  }
  
  /* Enhanced small text readability */
  small, .small {
    line-height: 1.5;
  }
  
  /* Responsive grid utilities for tablets */
  .grid-md-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-md-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-md-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  
  /* Enhanced spacing for tablets */
  .section-hero {
    padding: 4rem 0;
  }
  
  .sidebar {
    gap: var(--space-xl);
  }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
  body {
    line-height: 1.7;
  }
  
  section {
    margin: 4rem 0;
    padding: var(--space-3xl) 0;
  }
  
  /* Optimal typography for desktop reading */
  h1 {
    line-height: 1.0;
    letter-spacing: var(--ls-tighter);
  }
  
  h2 {
    line-height: 1.05;
    letter-spacing: var(--ls-tight);
  }
  
  h3 {
    line-height: 1.15;
  }
  
  /* Enhanced paragraph typography for desktop */
  p {
    line-height: 1.75;
    font-size: clamp(1rem, 0.75vw + 0.875rem, 1.125rem);
    margin-bottom: var(--space-xl);
  }
  
  .lead {
    line-height: 1.8;
    font-size: clamp(1.5rem, 2vw + 1rem, 1.75rem);
    margin-bottom: var(--space-2xl);
  }
  
  /* Enhanced navigation typography for desktop */
  nav ul li a {
    font-size: 1.125rem;
    letter-spacing: var(--ls-normal);
  }
  
  .footer-content {
    gap: var(--space-2xl);
  }
  
  /* Enhanced grid layouts for larger screens */
  .grid-lg-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-lg-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid-lg-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  
  /* Larger spacing for desktop */
  .section-spacing {
    margin: 5rem 0;
    padding: var(--space-2xl) 0;
  }
}

/* Extra large devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --text-primary: #000000;
    --text-secondary: #000000;
    --text-light: #333333;
    --primary-600: #0000ff;
    --primary-500: #0000ff;
    --bg-primary: #ffffff;
    --bg-secondary: #ffffff;
    --border-light: #000000;
    --border-medium: #000000;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode color overrides */
    --text-primary: var(--secondary-50);
    --text-secondary: var(--secondary-300);
    --text-light: var(--secondary-400);
    --text-muted: var(--secondary-400);
    --text-inverse: var(--secondary-900);
    
    --bg-primary: var(--secondary-900);
    --bg-secondary: var(--secondary-800);
    --bg-tertiary: var(--secondary-700);
    --bg-accent: var(--primary-900);
    --bg-muted: var(--secondary-800);
    
    --surface-primary: var(--secondary-800);
    --surface-secondary: var(--secondary-700);
    --surface-elevated: var(--secondary-700);
    
    --border-light: var(--secondary-700);
    --border-medium: var(--secondary-600);
    --border-dark: var(--secondary-500);
    
    /* Adjust gradients for dark mode */
    --gradient-hero: linear-gradient(135deg, var(--secondary-800) 0%, var(--secondary-700) 50%, var(--primary-900) 100%);
    --gradient-card: linear-gradient(145deg, var(--secondary-800) 0%, var(--secondary-700) 100%);
  }
  
  /* Dark mode specific adjustments */
  header {
    background-color: rgba(15, 23, 42, 0.95);
    border-bottom-color: var(--border-light);
  }
  
  .card {
    background: var(--surface-primary);
    border-color: var(--border-light);
  }
}

/* Enhanced Visual Elements */

/* Card Components */
.card {
  background: var(--surface-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

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

.card-gradient {
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  line-height: 1;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--border-dark);
}

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

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

/* Highlight Elements */
.highlight {
  background: linear-gradient(120deg, var(--primary-100) 0%, var(--primary-200) 100%);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary-500);
}

/* Accent Borders */
.border-accent {
  border-left: 4px solid var(--primary-500);
  padding-left: var(--space-md);
}

/* Focus styles for accessibility */
*:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

*:focus:not(:focus-visible) {
  outline: none;
}

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

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-blue);
  color: var(--bg-primary);
  padding: 8px;
  text-decoration: none;
  transition: top var(--transition-fast);
  z-index: 1001;
}

.skip-link:focus {
  top: 6px;
}/* 
Enhanced Color Application and Visual Elements */

/* Skip Link Enhancement */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-600);
    color: var(--text-inverse);
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: var(--fw-semibold);
    z-index: 10000;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
    outline: 2px solid var(--primary-300);
    outline-offset: 2px;
}

/* Enhanced Image Styling */
.img-fluid {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.img-fluid:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* Enhanced Link Styling */
a {
    color: var(--primary-600);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
}

a:hover {
    color: var(--primary-700);
}

a:focus {
    outline: 2px solid var(--primary-400);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Content Links with Underline Effect */
.content a:not(.btn):not(.skip-link) {
    background: linear-gradient(to right, var(--primary-600), var(--primary-600)) no-repeat;
    background-size: 0% 2px;
    background-position: left bottom;
    transition: background-size var(--transition-normal);
}

.content a:not(.btn):not(.skip-link):hover {
    background-size: 100% 2px;
}

/* Enhanced List Styling */
ul:not(.synonyms-list):not([role="menubar"]):not([role="list"]) {
    list-style: none;
    padding-left: 0;
}

ul:not(.synonyms-list):not([role="menubar"]):not([role="list"]) li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
}

ul:not(.synonyms-list):not([role="menubar"]):not([role="list"]) li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-600);
    font-size: 0.8em;
    top: 0.1em;
}

ol {
    padding-left: var(--space-lg);
    counter-reset: custom-counter;
}

ol li {
    counter-increment: custom-counter;
    position: relative;
    margin-bottom: var(--space-sm);
    list-style: none;
}

ol li::before {
    content: counter(custom-counter);
    position: absolute;
    left: -var(--space-lg);
    top: 0;
    background: var(--gradient-primary);
    color: var(--text-inverse);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-sm);
    font-weight: var(--fw-bold);
}

/* Enhanced Blockquote Styling */
blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(135deg, var(--secondary-50) 0%, var(--primary-50) 100%);
    border-left: 4px solid var(--primary-600);
    border-radius: var(--radius-lg);
    position: relative;
    font-style: italic;
    color: var(--text-secondary);
}

blockquote::before {
    content: '"';
    position: absolute;
    top: var(--space-sm);
    left: var(--space-md);
    font-size: 3rem;
    color: var(--primary-300);
    font-family: serif;
    line-height: 1;
}

blockquote p {
    margin: 0;
    font-size: var(--fs-lg);
    line-height: var(--lh-relaxed);
    position: relative;
    z-index: 1;
}

/* Enhanced Code Styling */
code {
    background: var(--secondary-100);
    color: var(--secondary-800);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9em;
    border: 1px solid var(--secondary-200);
}

pre {
    background: var(--secondary-900);
    color: var(--secondary-100);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--space-xl) 0;
    border: 1px solid var(--secondary-700);
}

pre code {
    background: none;
    color: inherit;
    padding: 0;
    border: none;
    font-size: var(--fs-sm);
}

/* Enhanced Form Elements */
input, textarea, select {
    background: var(--bg-primary);
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    width: 100%;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px var(--primary-100);
}

input:hover, textarea:hover, select:hover {
    border-color: var(--primary-400);
}

/* Enhanced Selection Styling */
::selection {
    background: var(--primary-200);
    color: var(--primary-900);
}

::-moz-selection {
    background: var(--primary-200);
    color: var(--primary-900);
}

/* Enhanced Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-100);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-700);
}

/* Enhanced Print Styles */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .btn {
        border: 2px solid black !important;
        background: white !important;
        color: black !important;
    }
    
    .card, .service-card, .stat-item {
        border: 1px solid black !important;
        background: white !important;
    }
    
    .tldr-section, .entity-info, .synonyms-section, .nlp-terms {
        border: 2px solid black !important;
        background: white !important;
    }
}

/* Enhanced High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-600: #0000ff;
        --primary-700: #000080;
        --text-primary: #000000;
        --text-secondary: #333333;
        --bg-primary: #ffffff;
        --border-light: #000000;
        --border-medium: #000000;
        --border-dark: #000000;
    }
    
    .btn {
        border-width: 3px;
        font-weight: var(--fw-bold);
    }
    
    .card, .service-card, .stat-item {
        border-width: 2px;
        border-color: #000000;
    }
    
    a {
        text-decoration: underline;
        font-weight: var(--fw-semibold);
    }
}

/* Enhanced Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .btn::before,
    .card::before,
    .service-card::before,
    .stat-item::before {
        display: none;
    }
}

/* Enhanced Color Scheme Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: var(--secondary-100);
        --text-secondary: var(--secondary-300);
        --text-light: var(--secondary-400);
        --bg-primary: var(--secondary-900);
        --bg-secondary: var(--secondary-800);
        --bg-tertiary: var(--secondary-700);
        --surface-primary: var(--secondary-800);
        --surface-secondary: var(--secondary-700);
        --border-light: var(--secondary-600);
        --border-medium: var(--secondary-500);
        --border-dark: var(--secondary-400);
    }
    
    header {
        background-color: rgba(15, 23, 42, 0.95);
        border-bottom-color: var(--secondary-600);
    }
    
    .hero {
        background: linear-gradient(135deg, var(--secondary-800) 0%, var(--secondary-700) 100%);
    }
    
    .services-highlight {
        background: linear-gradient(135deg, var(--secondary-900) 0%, var(--secondary-800) 100%);
    }
    
    .testimonials {
        background: linear-gradient(135deg, var(--secondary-800) 0%, var(--secondary-700) 100%);
    }
    
    .img-fluid {
        filter: brightness(0.9);
    }
    
    .img-fluid:hover {
        filter: brightness(1);
    }
}

/* Enhanced Layout Styles for Existing Components */

/* Header Layout Enhancement */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-primary);
  box-shadow: var(--shadow-md);
  padding: var(--space-md) 0;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

header .logo h1 {
  margin: 0;
  font-size: var(--fs-xl);
  color: var(--primary-600);
}

header nav ul {
  display: flex;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

header nav a {
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: var(--fw-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

header nav a:hover,
header nav a.active {
  background: var(--primary-50);
  color: var(--primary-700);
}

/* Hero Section Layout Enhancement */
.hero {
  padding: calc(var(--space-3xl) + 80px) 0 var(--space-3xl) 0;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.hero-content h2 {
  margin: 0 0 var(--space-md) 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: var(--lh-tight);
  color: var(--text-primary);
}

.hero-content > p {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  margin: 0 0 var(--space-xl) 0;
  line-height: var(--lh-relaxed);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.1));
}

/* Services Section Layout Enhancement */
.services-highlight {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

.services-highlight .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.services-highlight header {
  text-align: center;
  margin-bottom: 0;
}

.services-highlight h2 {
  margin: 0 0 var(--space-md) 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-primary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.services-cta {
  text-align: center;
  margin-top: var(--space-lg);
}

/* About Section Layout Enhancement */
.about-preview {
  padding: var(--space-3xl) 0;
  background: var(--bg-primary);
}

.about-preview .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-content header {
  margin-bottom: 0;
}

.about-content h2 {
  margin: 0 0 var(--space-md) 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-primary);
}

.about-content p {
  margin: 0;
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
}

.about-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* Detailed Content Layout Enhancement */
.detailed-content {
  padding: var(--space-3xl) 0;
  background: var(--bg-primary);
}

.detailed-content .container {
  max-width: var(--container-lg);
}

.detailed-content header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.detailed-content h2 {
  margin: 0 0 var(--space-md) 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-primary);
}

.detailed-content section {
  margin: var(--space-3xl) 0;
}

.detailed-content section h3 {
  margin: 0 0 var(--space-lg) 0;
  font-size: var(--fs-2xl);
  color: var(--text-primary);
  border-bottom: 2px solid var(--primary-200);
  padding-bottom: var(--space-md);
}

.detailed-content section p {
  margin: var(--space-md) 0;
  line-height: var(--lh-relaxed);
}

.detailed-content ul,
.detailed-content ol {
  margin: var(--space-lg) 0;
  padding-left: var(--space-xl);
}

.detailed-content li {
  margin-bottom: var(--space-md);
  line-height: var(--lh-relaxed);
}

/* Testimonials Section Layout Enhancement */
.testimonials {
  padding: var(--space-3xl) 0;
  background: var(--bg-secondary);
}

.testimonials .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.testimonials header {
  text-align: center;
  margin-bottom: 0;
}

.testimonials h2 {
  margin: 0 0 var(--space-md) 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-primary);
}

.testimonial-slider {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
}

.testimonial {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  transition: all var(--transition-normal);
}

.testimonial:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.testimonial-image {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.testimonial-image img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--primary-200);
}

.testimonial-content blockquote {
  margin: 0;
  padding: 0;
  border: none;
  background: none;
}

.testimonial-content p {
  margin: 0 0 var(--space-lg) 0;
  font-style: italic;
  font-size: var(--fs-lg);
  line-height: var(--lh-relaxed);
  color: var(--text-secondary);
}

.testimonial-content cite {
  display: block;
  font-style: normal;
  text-align: center;
}

.testimonial-content cite h4 {
  margin: 0 0 var(--space-xs) 0;
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
}

.testimonial-content cite p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--text-light);
}

/* CTA Section Layout Enhancement */
.cta {
  padding: var(--space-3xl) 0;
  background: var(--gradient-primary);
  color: var(--text-inverse);
  text-align: center;
}

.cta .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  align-items: center;
}

.cta header {
  margin-bottom: 0;
}

.cta h2 {
  margin: 0 0 var(--space-md) 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--text-inverse);
}

.cta p {
  margin: 0;
  font-size: var(--fs-lg);
  color: var(--text-inverse);
  opacity: 0.9;
}

/* Footer Layout Enhancement */
footer {
  background: var(--secondary-900);
  color: var(--text-inverse);
  padding: var(--space-3xl) 0 var(--space-lg) 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-logo h3 {
  margin: 0 0 var(--space-md) 0;
  color: var(--primary-400);
  font-size: var(--fs-xl);
}

.footer-logo p {
  margin: 0;
  color: var(--secondary-300);
  line-height: var(--lh-relaxed);
}

.footer-links h4,
.footer-services h4,
.footer-contact h4 {
  margin: 0 0 var(--space-lg) 0;
  color: var(--text-inverse);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
}

.footer-links ul,
.footer-services ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li,
.footer-services li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: var(--secondary-300);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.footer-links a:hover {
  color: var(--primary-400);
}

.footer-contact p {
  margin: 0 0 var(--space-sm) 0;
  color: var(--secondary-300);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.footer-contact a {
  color: var(--secondary-300);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.footer-contact a:hover {
  color: var(--primary-400);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--secondary-700);
  color: var(--secondary-400);
}

/* Enhanced Responsive Layout Adjustments */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  header nav ul {
    gap: var(--space-md);
  }
  
  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }
  
  .hero-content {
    order: 2;
  }
  
  .hero-image {
    order: 1;
  }
  
  .about-preview .container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }
  
  .about-image {
    order: 1;
  }
  
  .about-content {
    order: 2;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .testimonial-slider {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: calc(var(--space-2xl) + 80px) 0 var(--space-2xl) 0;
  }
  
  .services-highlight,
  .about-preview,
  .detailed-content,
  .testimonials,
  .cta {
    padding: var(--space-2xl) 0;
  }
  
  .detailed-content section {
    margin: var(--space-2xl) 0;
  }
  
  footer {
    padding: var(--space-2xl) 0 var(--space-lg) 0;
  }
}

/* Enhanced Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-600);
  color: var(--text-inverse);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: 1001;
  transition: top var(--transition-normal);
}

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

/* Enhanced Image Utilities */
.img-fluid {
  max-width: 100%;
  height: auto;
  display: block;
}

.img-responsive {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.img-rounded {
  border-radius: var(--radius-lg);
}

.img-circle {
  border-radius: 50%;
}

/* Enhanced Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible improvements */
*:focus-visible {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .hero {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--border-dark);
  }
  
  .services-highlight {
    background: var(--bg-primary);
    border-top: 2px solid var(--border-dark);
    border-bottom: 2px solid var(--border-dark);
  }
  
  .testimonials {
    background: var(--bg-primary);
    border-top: 2px solid var(--border-dark);
    border-bottom: 2px solid var(--border-dark);
  }
}
/* Device-Specific Performance Optimizations */

/* High-DPI Display Optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Enhanced shadows for high-DPI displays */
  .card:hover,
  .service-card:hover,
  .stat-item:hover {
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  }
  
  /* Sharper borders for high-DPI */
  .card,
  .service-card,
  .data-table {
    border-width: 0.5px;
  }
  
  /* Enhanced gradients for high-DPI */
  .btn {
    background-image: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 50%, var(--primary-800) 100%);
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  /* Larger touch targets for mobile */
  .btn {
    min-height: 48px;
    padding: var(--space-lg) var(--space-xl);
  }
  
  nav[role="navigation"] a {
    min-height: 44px;
    padding: var(--space-md) var(--space-lg);
  }
  
  .synonym-tag {
    min-height: 40px;
    padding: var(--space-md) var(--space-lg);
  }
  
  /* Remove hover effects on touch devices */
  .service-card:hover,
  .card:hover,
  .stat-item:hover,
  .nlp-term:hover,
  .synonym-tag:hover {
    transform: none;
    box-shadow: var(--shadow-md);
  }
  
  /* Enhanced focus states for touch */
  .btn:focus,
  nav[role="navigation"] a:focus,
  .synonym-tag:focus {
    outline: 3px solid var(--primary-400);
    outline-offset: 3px;
  }
}

/* Hover-capable Device Enhancements */
@media (hover: hover) and (pointer: fine) {
  /* Enhanced hover animations for precise pointers */
  .service-card {
    transition: all var(--transition-normal), transform var(--transition-bounce);
  }
  
  .card {
    transition: all var(--transition-normal), transform var(--transition-bounce);
  }
  
  .stat-item {
    transition: all var(--transition-normal), transform var(--transition-bounce);
  }
  
  /* Subtle cursor interactions */
  .service-card:hover,
  .card:hover,
  .stat-item:hover {
    cursor: pointer;
  }
  
  .synonym-tag:hover {
    cursor: pointer;
    transform: translateY(-3px) scale(1.05);
  }
  
  /* Enhanced button hover effects */
  .btn:hover {
    transform: translateY(-3px) scale(1.02);
  }
  
  .btn-lg:hover {
    transform: translateY(-4px) scale(1.02);
  }
}

/* Landscape Tablet Optimizations */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
  .hero-layout {
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-2xl);
    min-height: 60vh;
  }
  
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }
  
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
  }
  
  .section {
    padding: var(--space-xl) 0 var(--space-2xl) 0;
  }
}

/* Portrait Tablet Optimizations */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: portrait) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }
  
  .three-column {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

/* Large Desktop Optimizations (1440px+) */
@media (min-width: 1440px) {
  .container {
    max-width: 1400px;
  }
  
  /* Enhanced spacing for large screens */
  .section {
    padding: calc(var(--space-3xl) * 2) 0 calc(var(--space-3xl) * 2.5) 0;
  }
  
  /* Optimized grid layouts */
  .services-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3xl);
  }
  
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3xl);
  }
  
  /* Enhanced typography scaling */
  h1 {
    font-size: clamp(3rem, 5vw + 1rem, 5rem);
  }
  
  h2 {
    font-size: clamp(2.5rem, 4vw + 1rem, 4rem);
  }
  
  /* Larger interactive elements */
  .btn-lg {
    padding: var(--space-xl) calc(var(--space-3xl) * 1.5);
    font-size: var(--fs-2xl);
    min-width: 240px;
  }
}

/* Ultra-wide Display Optimizations (1920px+) */
@media (min-width: 1920px) {
  .container {
    max-width: 1600px;
  }
  
  .hero-layout {
    gap: var(--space-3xl);
    min-height: 80vh;
  }
  
  .services-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-3xl);
  }
  
  .section {
    padding: calc(var(--space-3xl) * 2.5) 0 calc(var(--space-3xl) * 3) 0;
  }
}

/* Performance Optimizations */

/* GPU Acceleration for Smooth Animations */
.service-card,
.card,
.stat-item,
.btn,
.synonym-tag,
.nlp-term {
  will-change: transform;
  transform: translateZ(0);
}

/* Optimize repaints during animations */
.service-card:hover,
.card:hover,
.stat-item:hover,
.btn:hover,
.synonym-tag:hover,
.nlp-term:hover {
  will-change: transform, box-shadow;
}

/* Reset will-change after animations */
.service-card,
.card,
.stat-item,
.btn,
.synonym-tag,
.nlp-term {
  transition: all var(--transition-normal), will-change 0s var(--transition-normal);
}

/* Contain layout shifts */
.services-grid,
.card-grid,
.stats-grid,
.testimonial-grid {
  contain: layout style;
}

/* Optimize font rendering */
@supports (font-display: optional) {
  * {
    font-display: optional;
  }
}

/* Reduce motion for users who prefer it */
@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;
  }
  
  .service-card:hover,
  .card:hover,
  .stat-item:hover,
  .btn:hover,
  .synonym-tag:hover,
  .nlp-term:hover {
    transform: none;
  }
}

/* Print Optimizations */
@media print {
  /* Hide interactive elements */
  .btn,
  .nav-toggle,
  nav[role="navigation"] {
    display: none;
  }
  
  /* Optimize spacing for print */
  .section {
    padding: var(--space-lg) 0;
    break-inside: avoid;
  }
  
  .service-card,
  .card,
  .stat-item {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--border-dark);
  }
  
  /* Ensure readable text */
  body {
    font-size: 12pt;
    line-height: 1.4;
    color: black;
    background: white;
  }
  
  h1, h2, h3, h4, h5, h6 {
    color: black;
    page-break-after: avoid;
  }
  
  /* Optimize tables for print */
  .data-table {
    font-size: 10pt;
    border-collapse: collapse;
  }
  
  .data-table th,
  .data-table td {
    border: 1px solid black;
    padding: 4pt 8pt;
  }
}

/* Accessibility Enhancements */

/* High contrast mode support */
@media (prefers-contrast: high) {
  .service-card,
  .card,
  .stat-item {
    border: 2px solid;
    border-color: currentColor;
  }
  
  .btn {
    border: 2px solid;
    border-color: currentColor;
  }
  
  .synonym-tag {
    border: 2px solid;
    border-color: currentColor;
  }
}

/* Focus management improvements */
.service-card:focus,
.card:focus,
.stat-item:focus {
  outline: 3px solid var(--primary-400);
  outline-offset: 3px;
}

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

/* Focus visible improvements */
@supports selector(:focus-visible) {
  .btn:focus:not(:focus-visible),
  nav[role="navigation"] a:focus:not(:focus-visible),
  .service-card:focus:not(:focus-visible),
  .card:focus:not(:focus-visible) {
    outline: none;
  }
  
  .btn:focus-visible,
  nav[role="navigation"] a:focus-visible,
  .service-card:focus-visible,
  .card:focus-visible {
    outline: 3px solid var(--primary-400);
    outline-offset: 3px;
  }
}

/* Internet Explorer 11 Specific Fixes */
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
  /* IE11 flexbox fixes */
  .btn {
    -ms-flex-negative: 0;
    flex-shrink: 0;
  }
  
  .card {
    -ms-flex: 1 1 auto;
    flex: 1 1 auto;
  }
  
  /* IE11 grid fallback */
  .stats-grid {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  
  .stats-grid > * {
    -ms-flex: 1 1 200px;
    flex: 1 1 200px;
    margin: var(--space-sm, 0.5rem);
  }
  
  /* IE11 CSS custom properties fallback */
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #212529;
    background-color: #ffffff;
  }
  
  .btn {
    background: #2563eb;
    color: #ffffff;
    border-radius: 0.5rem;
    padding: 1rem 2rem;
  }
  
  .card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  }
}

/* Safari-specific optimizations */
@supports (-webkit-appearance: none) {
  /* Safari font smoothing */
  body {
    -webkit-font-smoothing: antialiased;
  }
  
  /* Safari flexbox fixes */
  .btn {
    -webkit-box-flex: 0;
    -webkit-flex-shrink: 0;
    flex-shrink: 0;
  }
  
  /* Safari transform optimization */
  .card:hover {
    -webkit-transform: translateY(-4px);
    transform: translateY(-4px);
  }
}

/* Firefox-specific optimizations */
@-moz-document url-prefix() {
  /* Firefox font rendering */
  body {
    -moz-osx-font-smoothing: grayscale;
  }
  
  /* Firefox flexbox fixes */
  .stats-grid {
    display: -moz-box;
    display: flex;
  }
}

/* Edge Legacy specific fixes */
@supports (-ms-ime-align: auto) {
  .card {
    -ms-flex: 1 1 auto;
    flex: 1 1 auto;
  }
  
  .btn {
    -ms-flex-negative: 0;
    flex-shrink: 0;
  }
}

/* Performance optimizations for older browsers */
.no-cssanimations .card:hover,
.no-csstransitions .card:hover {
  /* Fallback for browsers without animation support */
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.no-cssgradients .card {
  /* Fallback for browsers without gradient support */
  background: #ffffff;
}

.no-cssgradients .btn {
  /* Fallback for browsers without gradient support */
  background: #2563eb;
}

/* Critical CSS for above-the-fold content */
.hero {
  /* Ensure hero section renders quickly */
  contain: layout style paint;
  will-change: auto;
}

.hero-content {
  /* Optimize hero content rendering */
  contain: layout;
}

/* Optimize font loading for critical text */
.hero h2,
.hero p {
  /* Use system fonts as fallback during font loading */
  font-family: var(--font-heading, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
}

/* Preload critical images */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB2aWV3Qm94PSIwIDAgMSAxIiBmaWxsPSJub25lIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjxyZWN0IHdpZHRoPSIxIiBoZWlnaHQ9IjEiIGZpbGw9InRyYW5zcGFyZW50Ii8+PC9zdmc+');
  opacity: 0;
  pointer-events: none;
}

/* Optimize critical rendering path */
@media (max-width: 768px) {
  /* Mobile-first critical CSS */
  .container {
    padding: 0 1rem;
    contain: layout;
  }
  
  .hero {
    padding: 2rem 0;
    contain: layout style;
  }
}

/* Performance monitoring and optimization */
.perf-monitor {
  /* Hidden element for performance monitoring */
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Optimize for high-DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize borders for retina displays */
  .card,
  .btn {
    border-width: 0.5px;
  }
}

/* Optimize for print */
@media print {
  /* Remove animations and transitions for print */
  *,
  *::before,
  *::after {
    animation-duration: 0s !important;
    animation-delay: 0s !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
  
  /* Optimize colors for print */
  .card {
    background: white !important;
    box-shadow: none !important;
    border: 1px solid #000 !important;
  }
  
  .btn {
    background: white !important;
    color: black !important;
    border: 2px solid black !important;
  }
}

/* Resource hints for performance */
.preload-fonts {
  /* Preload critical fonts */
  font-family: 'Inter', 'Poppins';
  position: absolute;
  left: -9999px;
  visibility: hidden;
}

/* Optimize for reduced data usage */
@media (prefers-reduced-data: reduce) {
  /* Disable non-essential animations */
  .card::before,
  .btn::before {
    display: none;
  }
  
  /* Use simpler gradients */
  .card {
    background: var(--bg-primary, #ffffff);
  }
}

/* Container queries fallback */
@supports not (container-type: inline-size) {
  /* Fallback for browsers without container query support */
  .card {
    width: 100%;
    max-width: 400px;
  }
}

/* Modern CSS features with fallbacks */
@supports (backdrop-filter: blur(10px)) {
  .modal-backdrop {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
}

@supports not (backdrop-filter: blur(10px)) {
  .modal-backdrop {
    background: rgba(0, 0, 0, 0.8);
  }
}

/* Optimize for touch devices */
@media (hover: none) and (pointer: coarse) {
  /* Optimize touch targets */
  .btn {
    min-height: 44px;
    min-width: 44px;
    padding: 1rem 1.5rem;
  }
  
  /* Remove hover effects on touch devices */
  .card:hover {
    transform: none;
  }
}

/* Optimize for keyboard navigation */
@media (hover: none) {
  /* Ensure focus states are visible */
  .btn:focus,
  .card:focus {
    outline: 3px solid #2563eb;
    outline-offset: 2px;
  }
}

/* Critical CSS loading optimization */
.fonts-loading {
  /* Hide text during font loading to prevent FOIT */
  visibility: hidden;
}

.fonts-loaded {
  /* Show text after fonts are loaded */
  visibility: visible;
}

/* Optimize for slow connections */
@media (prefers-reduced-motion: reduce) and (prefers-reduced-data: reduce) {
  /* Minimal styles for slow connections */
  .card {
    background: white;
    border: 1px solid #ccc;
    padding: 1rem;
  }
  
  .btn {
    background: #2563eb;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
  }
}