/* Modern CSS with Multi-tenant Support and Web 4.0 Standards */

/* CSS Custom Properties for Dynamic Theming */
:root {
  /* Primary Brand Colors */
  --brand-primary: #1e40af;
  --brand-primary-dark: #1e3a8a;
  --brand-primary-light: #3b82f6;
  --brand-accent: #d4a017;
  --brand-accent-light: #f59e0b;
  
  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Semantic Colors */
  --color-success: #10b981;
  --color-success-light: #34d399;
  --color-warning: #f59e0b;
  --color-warning-light: #fbbf24;
  --color-error: #ef4444;
  --color-error-light: #f87171;
  --color-info: #3b82f6;
  --color-info-light: #60a5fa;
  
  /* Typography */
  --font-family-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
}

/* Multi-tenant Theme Overrides */
[data-theme="dark"] {
  --color-white: #111827;
  --color-gray-50: #1f2937;
  --color-gray-100: #374151;
  --color-gray-900: #f9fafb;
  --color-gray-800: #f3f4f6;
}

[data-theme="custom-a"] {
  --brand-primary: #7c3aed;
  --brand-primary-dark: #6d28d9;
  --brand-primary-light: #8b5cf6;
  --brand-accent: #ec4899;
  --brand-accent-light: #f472b6;
}

[data-theme="custom-b"] {
  --brand-primary: #059669;
  --brand-primary-dark: #047857;
  --brand-primary-light: #10b981;
  --brand-accent: #f59e0b;
  --brand-accent-light: #fbbf24;
}

/* GoldRavenia Typography & Layout System - CRITICAL CORRECTIVE ACTION */
[data-tenant="goldravenia"] {
  /* AUTHENTIC TYPEFACE MAPPING */
  --brand-font-serif: 'Playfair Display', serif; /* Brand Typeface - for H1, H2 headings */
  --brand-font-sans: 'Inter', sans-serif; /* Functional UI Typeface - body, forms, navigation */
  
  /* Layout Architecture */
  --brand-spacing-large: 150px; /* Negative space requirement */
  --brand-spacing-medium: 80px;
  --brand-spacing-small: 40px;
}

/* GoldRavenia Global Typography Application */
[data-tenant="goldravenia"] h1,
[data-tenant="goldravenia"] h2 {
  font-family: var(--brand-font-serif);
  font-weight: 700;
  color: var(--brand-primary);
}

[data-tenant="goldravenia"] body,
[data-tenant="goldravenia"] p,
[data-tenant="goldravenia"] nav,
[data-tenant="goldravenia"] .navigation,
[data-tenant="goldravenia"] form,
[data-tenant="goldravenia"] input,
[data-tenant="goldravenia"] button,
[data-tenant="goldravenia"] .menu,
[data-tenant="goldravenia"] .ui-element {
  font-family: var(--brand-font-sans);
  font-weight: 500;
  color: var(--brand-text);
}

/* GoldRavenia Typography Classes */
.brand-serif { 
  font-family: var(--brand-font-serif); 
  font-weight: 700;
}

.brand-sans { 
  font-family: var(--brand-font-sans); 
  font-weight: 500;
}

/* GoldRavenia Layout Classes */
.brand-central { 
  text-align: center; 
  margin: 0 auto;
  max-width: 1200px;
}

.brand-spacing { 
  padding: var(--brand-spacing-large); 
  min-height: 100vh;
}

.brand-spacing-medium {
  padding: var(--brand-spacing-medium);
}

.brand-spacing-small {
  padding: var(--brand-spacing-small);
}

.brand-divider { 
  border-top: 1px solid var(--brand-primary); 
  margin: 60px 0;
  position: relative;
}

.brand-divider::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  right: 0;
  border-top: 0.5px solid var(--brand-primary);
}

/* GoldRavenia Component Styles */
[data-tenant="goldravenia"] body {
  background-color: var(--brand-background);
  color: var(--brand-text);
  font-family: var(--brand-font-sans);
}

[data-tenant="goldravenia"] .brand-surface {
  background-color: var(--brand-surface);
  border: 1px solid var(--brand-border);
  border-radius: 8px;
}

[data-tenant="goldravenia"] .brand-button {
  background-color: var(--brand-primary);
  color: var(--brand-accent);
  border: none;
  padding: 12px 24px;
  font-family: var(--brand-font-sans);
  font-weight: 600;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
}

[data-tenant="goldravenia"] .brand-button:hover {
  background-color: var(--brand-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--brand-shadow);
}

[data-tenant="goldravenia"] .brand-text-primary {
  color: var(--brand-text);
}

[data-tenant="goldravenia"] .brand-text-secondary {
  color: var(--brand-text-secondary);
}

[data-tenant="goldravenia"] .brand-logo-display {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto;
  display: block;
}

[data-tenant="goldravenia"] .brand-crest-display {
  width: 60px;
  height: 60px;
}

/* Remove all gradients for flat design */
[data-tenant="goldravenia"] .brand-gradient,
[data-tenant="goldravenia"] .brand-gradient-text {
  background: none !important;
  background-image: none !important;
  -webkit-background-clip: unset !important;
  background-clip: unset !important;
  -webkit-text-fill-color: var(--brand-primary) !important;
}

/* GoldRavenia Theme - ZERO TOLERANCE DEFINITIVE COLOR SYSTEM */
[data-tenant="goldravenia"] {
  /* ABSOLUTE EXTRACTIVE COLORS FROM GolDarveniaFinalLogo.png - ZERO TOLERANCE */
  --brand-primary: #B69B60; /* Core Brand Gold - Rich bronze gold */
  --brand-primary-dark: #775B3A; /* Shadow Gold - Cool Umber Sepia Gold */
  --brand-primary-light: #C8A970;
  --brand-primary-hover: #775B3A; /* Shadow definitions */
  --brand-accent: #000000; /* Core Background - Absolute Pitch Black */
  --brand-accent-light: #000000; /* NO VARIATION - ABSOLUTE PITCH BLACK */
  --brand-accent-dark: #000000; /* NO VARIATION - ABSOLUTE PITCH BLACK */
  --brand-secondary: #000000; /* NO VARIATION - ABSOLUTE PITCH BLACK */
  --brand-text: #FFFFFF;
  --brand-text-secondary: #E1E1E1;
  --brand-text-muted: #B8B8C8;
  --brand-background: #000000; /* Core Background - Absolute Pitch Black */
  --brand-surface: #000000; /* NO VARIATION - ABSOLUTE PITCH BLACK */
  --brand-border: #B69B60; /* Core Brand Gold for borders */
  --brand-logo: url('/assets/tenants/goldravenia-logo-winner.svg?v=20250308002');
  --brand-shadow: 0 4px 20px rgba(182, 155, 96, 0.3); /* Core Brand Gold shadow */
  --brand-shadow-deep: 0 6px 25px rgba(119, 91, 58, 0.4); /* Umber Sepia Gold for depth */
}

/* BlackRavenia Theme - Premium SUV */
[data-tenant="blackravenia"] {
  --brand-primary: #1a1a1a;
  --brand-primary-dark: #000000;
  --brand-primary-light: #333333;
  --brand-accent: #d4af37;
  --brand-accent-light: #f4d03f;
  --brand-secondary: #666666;
  --brand-text: #ffffff;
  --brand-text-muted: #cccccc;
  --brand-background: #0a0a0a;
  --brand-surface: #1a1a1a;
  --brand-border: #333333;
  --brand-logo: url('/assets/tenants/blackravenia-logo.svg');
  --brand-gradient: linear-gradient(135deg, #1a1a1a 0%, #d4af37 100%);
  --brand-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
}

/* SilverPeak Theme - Executive Chauffeur */
[data-tenant="silverpeak"] {
  --brand-primary: #6b7280;
  --brand-primary-dark: #4b5563;
  --brand-primary-light: #9ca3af;
  --brand-accent: #c0c0c0;
  --brand-accent-light: #e5e5e5;
  --brand-secondary: #8b8c8e;
  --brand-text: #ffffff;
  --brand-text-muted: #d1d5db;
  --brand-background: #374151;
  --brand-surface: #4b5563;
  --brand-border: #6b7280;
  --brand-logo: url('/assets/tenants/silverpeak-logo.svg');
  --brand-gradient: linear-gradient(135deg, #6b7280 0%, #c0c0c0 100%);
  --brand-shadow: 0 4px 20px rgba(192, 192, 192, 0.3);
}

/* MetroFleet Theme - Standard Rideshare */
[data-tenant="metrofleet"] {
  --brand-primary: #2563eb;
  --brand-primary-dark: #1d4ed8;
  --brand-primary-light: #3b82f6;
  --brand-accent: #f59e0b;
  --brand-accent-light: #fbbf24;
  --brand-secondary: #64748b;
  --brand-text: #ffffff;
  --brand-text-muted: #cbd5e1;
  --brand-background: #1e293b;
  --brand-surface: #334155;
  --brand-border: #475569;
  --brand-logo: url('/assets/tenants/metrofleet-logo.svg');
  --brand-gradient: linear-gradient(135deg, #2563eb 0%, #f59e0b 100%);
  --brand-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

/* NightOwl Theme - Late-Night */
[data-tenant="nightowl"] {
  --brand-primary: #7c3aed;
  --brand-primary-dark: #6d28d9;
  --brand-primary-light: #8b5cf6;
  --brand-accent: #f472b6;
  --brand-accent-light: #f9a8d4;
  --brand-secondary: #a855f7;
  --brand-text: #ffffff;
  --brand-text-muted: #e9d5ff;
  --brand-background: #2e1065;
  --brand-surface: #4c1d95;
  --brand-border: #6d28d9;
  --brand-logo: url('/assets/tenants/nightowl-logo.svg');
  --brand-gradient: linear-gradient(135deg, #7c3aed 0%, #f472b6 100%);
  --brand-shadow: 0 4px 20px rgba(124, 58, 237, 0.3);
}

/* AeroTransit Theme - Airport Specialist */
[data-tenant="aerotransit"] {
  --brand-primary: #0ea5e9;
  --brand-primary-dark: #0284c7;
  --brand-primary-light: #38bdf8;
  --brand-accent: #0f172a;
  --brand-accent-light: #1e293b;
  --brand-secondary: #64748b;
  --brand-text: #ffffff;
  --brand-text-muted: #bae6fd;
  --brand-background: #0369a1;
  --brand-surface: #0284c7;
  --brand-border: #0ea5e9;
  --brand-logo: url('/assets/tenants/aerotransit-logo.svg');
  --brand-gradient: linear-gradient(135deg, #0ea5e9 0%, #0f172a 100%);
  --brand-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

/* CorporateRide Theme - B2B Corporate */
[data-tenant="corporateride"] {
  --brand-primary: #1e293b;
  --brand-primary-dark: #0f172a;
  --brand-primary-light: #334155;
  --brand-accent: #22c55e;
  --brand-accent-light: #4ade80;
  --brand-secondary: #475569;
  --brand-text: #ffffff;
  --brand-text-muted: #cbd5e1;
  --brand-background: #0f172a;
  --brand-surface: #1e293b;
  --brand-border: #334155;
  --brand-logo: url('/assets/tenants/corporateride-logo.svg');
  --brand-gradient: linear-gradient(135deg, #1e293b 0%, #22c55e 100%);
  --brand-shadow: 0 4px 20px rgba(34, 197, 94, 0.3);
}

/* GreenWave Theme - EV-Only Eco */
[data-tenant="greenwave"] {
  --brand-primary: #16a34a;
  --brand-primary-dark: #15803d;
  --brand-primary-light: #22c55e;
  --brand-accent: #86efac;
  --brand-accent-light: #bbf7d0;
  --brand-secondary: #4ade80;
  --brand-text: #ffffff;
  --brand-text-muted: #dcfce7;
  --brand-background: #14532d;
  --brand-surface: #166534;
  --brand-border: #16a34a;
  --brand-logo: url('/assets/tenants/greenwave-logo.svg');
  --brand-gradient: linear-gradient(135deg, #16a34a 0%, #86efac 100%);
  --brand-shadow: 0 4px 20px rgba(22, 163, 74, 0.3);
}

/* LegacyLuxe Theme - Premium 24/7 */
[data-tenant="legacyluxe"] {
  --brand-primary: #78350f;
  --brand-primary-dark: #451a03;
  --brand-primary-light: #92400e;
  --brand-accent: #fbbf24;
  --brand-accent-light: #fde68a;
  --brand-secondary: #b45309;
  --brand-text: #ffffff;
  --brand-text-muted: #fef3c7;
  --brand-background: #451a03;
  --brand-surface: #78350f;
  --brand-border: #92400e;
  --brand-logo: url('/assets/tenants/legacyluxe-logo.svg');
  --brand-gradient: linear-gradient(135deg, #78350f 0%, #fbbf24 100%);
  --brand-shadow: 0 4px 20px rgba(120, 53, 15, 0.3);
}

/* UrbanRush Theme - Budget Volume */
[data-tenant="urbanrush"] {
  --brand-primary: #dc2626;
  --brand-primary-dark: #b91c1c;
  --brand-primary-light: #ef4444;
  --brand-accent: #fca5a5;
  --brand-accent-light: #fecaca;
  --brand-secondary: #ef4444;
  --brand-text: #ffffff;
  --brand-text-muted: #fee2e2;
  --brand-background: #991b1b;
  --brand-surface: #b91c1c;
  --brand-border: #dc2626;
  --brand-logo: url('/assets/tenants/urbanrush-logo.svg');
  --brand-gradient: linear-gradient(135deg, #dc2626 0%, #fca5a5 100%);
  --brand-shadow: 0 4px 20px rgba(220, 38, 38, 0.3);
}

/* GoldRavenia Universal Accent Color Application - FORCED CORRECTION */
[data-tenant="goldravenia"] {
  background-color: #000000 !important; /* ABSOLUTE PITCH BLACK - NO VARIATION */
}

/* FORCED ABSOLUTE BACKGROUND OVERRIDE */
[data-tenant="goldravenia"] body,
[data-tenant="goldravenia"] html,
[data-tenant="goldravenia"] .container,
[data-tenant="goldravenia"] .main,
[data-tenant="goldravenia"] .section,
[data-tenant="goldravenia"] .background {
  background-color: #000000 !important;
  background-image: none !important;
}

/* Universal Accent Color (Core Brand Gold #B69B60) - FORCED */
[data-tenant="goldravenia"] .btn-primary,
[data-tenant="goldravenia"] .btn-primary:hover,
[data-tenant="goldravenia"] button.primary,
[data-tenant="goldravenia"] a.primary,
[data-tenant="goldravenia"] .active,
[data-tenant="goldravenia"] .selected {
  background-color: #B69B60 !important; /* FORCED CORE BRAND GOLD */
  border-color: #B69B60 !important;
  color: #000000 !important; /* ABSOLUTE PITCH BLACK TEXT */
}

[data-tenant="goldravenia"] a,
[data-tenant="goldravenia"] .link,
[data-tenant="goldravenia"] .text-link {
  color: #B69B60 !important; /* FORCED CORE BRAND GOLD */
}

[data-tenant="goldravenia"] .border-accent,
[data-tenant="goldravenia"] input:focus,
[data-tenant="goldravenia"] textarea:focus,
[data-tenant="goldravenia"] select:focus {
  border-color: #B69B60 !important; /* FORCED CORE BRAND GOLD */
  box-shadow: 0 0 0 2px rgba(182, 155, 96, 0.2) !important;
}

/* Accent Depth (Shadow Gold #775B3A) - FORCED */
[data-tenant="goldravenia"] .btn-primary:hover,
[data-tenant="goldravenia"] button.primary:hover,
[data-tenant="goldravenia"] .cta-button:hover {
  background-color: #775B3A !important; /* FORCED SHADOW GOLD */
  box-shadow: 0 6px 25px rgba(119, 91, 58, 0.4) !important;
  transform: translateY(-1px);
}

[data-tenant="goldravenia"] .btn-primary:focus,
[data-tenant="goldravenia"] button.primary:focus {
  box-shadow: 0 0 0 3px rgba(182, 155, 96, 0.3), 0 6px 25px rgba(119, 91, 58, 0.4) !important;
}

/* Golden Divider Lines - FORCED */
[data-tenant="goldravenia"] .divider,
[data-tenant="goldravenia"] .section-divider {
  border-color: #B69B60 !important; /* FORCED CORE BRAND GOLD */
  border-width: 1px;
  opacity: 0.8;
}

/* Theme transition utilities */
.theme-transition {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.theme-transition-slow {
  transition: background-color 0.5s ease, color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

/* Skip Links */
.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;
}

/* Hero Gradient */
.hero-gradient {
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-primary-dark) 50%, #4c1d95 100%);
  position: relative;
  overflow: hidden;
}

.hero-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(212, 160, 23, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

/* Animations */
@keyframes float {
  0%, 100% { 
    transform: translateY(0px); 
  }
  50% { 
    transform: translateY(-20px); 
  }
}

@keyframes pulse {
  0%, 100% { 
    opacity: 1; 
  }
  50% { 
    opacity: 0.8; 
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Utility Classes */
.float-animation {
  animation: float 6s ease-in-out infinite;
}

.pulse-animation {
  animation: pulse 2s ease-in-out infinite;
}

.gradient-text {
  background: linear-gradient(135deg, var(--brand-accent) 0%, var(--brand-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.card-hover {
  transition: all var(--transition-normal);
}

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

/* Loading States */
.loading {
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.loaded {
  opacity: 1;
}

/* Responsive Images */
img {
  max-width: 100%;
  height: auto;
  loading: lazy;
}

/* Form Elements */
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  margin: 0;
}

/* Touch Targets */
@media (hover: none) and (pointer: coarse) {
  button, a, input, select, textarea {
    min-height: 44px;
    min-width: 44px;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #e9ecef;
    --color-gray-900: #000000;
    --color-gray-800: #212529;
  }
  
  .hero-gradient {
    background: linear-gradient(135deg, #0066cc 0%, #004499 50%, #003366 100%);
  }
}

/* Reduced Motion */
@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;
  }
  
  .hero-gradient::before {
    animation: none;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-white: #111827;
    --color-gray-50: #1f2937;
    --color-gray-100: #374151;
    --color-gray-900: #f9fafb;
    --color-gray-800: #f3f4f6;
  }
}

/* Print Styles */
@media print {
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  .no-print {
    display: none !important;
  }
  
  a, a:visited {
    text-decoration: underline;
  }
  
  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
}

/* Performance Optimizations */
.will-change-transform {
  will-change: transform;
}

.will-change-opacity {
  will-change: opacity;
}

.gpu-accelerated {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Container Queries Support */
@container (width > 768px) {
  .container-query-demo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

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

@supports (aspect-ratio: 16/9) {
  .aspect-video {
    aspect-ratio: 16/9;
  }
}

/* Container Queries */
@container (min-width: 400px) {
  .responsive-card {
    padding: var(--space-lg);
  }
}

/* Logical Properties */
.logical-margin {
  margin-inline: auto;
  margin-block: var(--space-lg);
}

.logical-padding {
  padding-inline: var(--space-lg);
  padding-block: var(--space-md);
}

/* Modern Grid and Flexbox */
.modern-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.modern-flex {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-400);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-500);
}

/* Selection Color */
::selection {
  background-color: var(--brand-primary);
  color: var(--color-white);
}

/* Focus Ring */
.focus-ring:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}