/*
 * DNT Brand CSS
 * Corporate Identity System (CIS)
 * Single Source of Truth for Brand Visual Elements
 */

/* ========================================
   CSS CUSTOM PROPERTIES (CSS VARIABLES)
   ======================================== */

:root {
  /* ===== BRAND COLORS (色彩規劃) ===== */
  
  /* Primary Brand Colors */
  --brand-primary-red: #FF7373;
  --brand-primary-grey: #5B5B5B;
  
  /* Auxiliary Blue Color System */
  --brand-blue-50: #EBF4FF;
  --brand-blue-100: #BEE3F8;
  --brand-blue-200: #90CDF4;
  --brand-blue-300: #63B3ED;
  --brand-blue-400: #4299E1;
  --brand-blue-500: #739fe8;
  --brand-blue-600: #3182CE;
  --brand-blue-700: #2C5282;
  --brand-blue-800: #2A4365;
  --brand-blue-900: #1A365D;
  
  /* Red Color Palette */
  --brand-red-50: #FFF1F1;
  --brand-red-100: #FFE3E3;
  --brand-red-200: #FFD5D5;
  --brand-red-300: #FFC7C7;
  --brand-red-400: #FFABAB;
  --brand-red-500: #FF8F8F;
  --brand-red-600: #FF7373;
  --brand-red-700: #D95C5C;
  --brand-red-800: #B34545;
  --brand-red-900: #4A1A1A;
  
  /* Neutral Colors - Enhanced for better contrast */
  --brand-white: #FFFFFF;
  --brand-black: #1A202C;
  --brand-grey-50: #F7FAFC;
  --brand-grey-100: #EDF2F7;
  --brand-grey-200: #E2E8F0;
  --brand-grey-300: #CBD5E0;
  --brand-grey-400: #A0AEC0;
  --brand-grey-500: #718096;
  --brand-grey-600: #4A5568;
  --brand-grey-700: #2D3748;
  --brand-grey-800: #1A202C;
  --brand-grey-900: #171923;
  
  /* Semantic Colors - Improved contrast */
  --brand-success: #38A169;
  --brand-warning: #D69E2E;
  --brand-error: #E53E3E;
  --brand-info: #3182CE;
  
  /* Enhanced Background Colors for better readability */
  --brand-bg-primary: #FFFFFF;
  --brand-bg-secondary: #F7FAFC;
  --brand-bg-accent: #EBF4FF;
  --brand-bg-dark: #1A202C;
  
  /* Enhanced Text Colors for better contrast */
  --brand-text-primary: #1A202C;
  --brand-text-secondary: #4A5568;
  --brand-text-muted: #718096;
  --brand-text-inverse: #FFFFFF;
  
  /* ===== TYPOGRAPHY SYSTEM (字體規範) ===== */
  
  /* Font Families */
  --font-english: 'Barlow', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-chinese: 'Noto Sans TC', 'PingFang TC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* ===== VISUAL TONE (視覺風格) ===== */
  
  /* Approachable (可親近的) - Rounded Corners */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  
  /* Modern (現代的) - Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  --shadow-brand: 0 10px 25px -3px rgba(255, 115, 115, 0.1), 0 4px 6px -2px rgba(255, 115, 115, 0.05);
  
  /* Lively (活潑的) - Spacing */
  --spacing-xs: 0.25rem;   /* 4px */
  --spacing-sm: 0.5rem;    /* 8px */
  --spacing-md: 1rem;      /* 16px */
  --spacing-lg: 1.5rem;    /* 24px */
  --spacing-xl: 2rem;      /* 32px */
  --spacing-2xl: 3rem;     /* 48px */
  --spacing-3xl: 4rem;     /* 64px */
  --spacing-4xl: 6rem;     /* 96px */
  
  /* 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;
}

/* ========================================
   BASE STYLES FROM MAIN.CSS
   ======================================== */

/* Base HTML/Body styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-english);
    line-height: 1.6;
    color: var(--brand-text-primary);
    background-color: var(--brand-bg-primary);
    margin: 0;
    padding: 0;
}

/* Typography hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
    color: var(--brand-text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

/* Base link styles */
a {
    color: var(--brand-red-600);
    text-decoration: none;
    transition: var(--transition-normal);
}

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

/* Grid system */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Section spacing */
.section {
    padding: var(--spacing-4xl) 0;
}

.section-hero {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--brand-red-50) 0%, var(--brand-blue-50) 100%);
}

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-4 { margin-bottom: var(--spacing-md); }
.mb-8 { margin-bottom: var(--spacing-xl); }
.mt-4 { margin-top: var(--spacing-md); }
.mt-8 { margin-top: var(--spacing-xl); }

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Enhanced focus states for accessibility */
*:focus {
    outline: 2px solid var(--brand-red-600);
    outline-offset: 2px;
}

/* Skip to content link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--brand-red-600);
    color: var(--brand-white);
    padding: var(--spacing-sm);
    text-decoration: none;
    border-radius: var(--radius-xs);
    z-index: var(--z-tooltip);
    transition: var(--transition-fast);
}

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

/* ========================================
   BRAND COLOR UTILITIES
   ======================================== */

/* Background Colors */
.bg-brand-red { background-color: var(--brand-primary-red); }
.bg-brand-grey { background-color: var(--brand-primary-grey); }
.bg-brand-white { background-color: var(--brand-white); }
.bg-brand-black { background-color: var(--brand-black); }

.bg-brand-red-50 { background-color: var(--brand-red-50); }
.bg-brand-red-100 { background-color: var(--brand-red-100); }
.bg-brand-red-200 { background-color: var(--brand-red-200); }
.bg-brand-red-300 { background-color: var(--brand-red-300); }
.bg-brand-red-400 { background-color: var(--brand-red-400); }
.bg-brand-red-500 { background-color: var(--brand-red-500); }
.bg-brand-red-600 { background-color: var(--brand-red-600); }
.bg-brand-red-700 { background-color: var(--brand-red-700); }
.bg-brand-red-800 { background-color: var(--brand-red-800); }

/* Blue color backgrounds */
.bg-brand-blue { background-color: var(--brand-blue-500); }
.bg-brand-blue-50 { background-color: var(--brand-blue-50); }
.bg-brand-blue-100 { background-color: var(--brand-blue-100); }
.bg-brand-blue-200 { background-color: var(--brand-blue-200); }
.bg-brand-blue-300 { background-color: var(--brand-blue-300); }
.bg-brand-blue-400 { background-color: var(--brand-blue-400); }
.bg-brand-blue-500 { background-color: var(--brand-blue-500); }
.bg-brand-blue-600 { background-color: var(--brand-blue-600); }
.bg-brand-blue-700 { background-color: var(--brand-blue-700); }
.bg-brand-blue-800 { background-color: var(--brand-blue-800); }
.bg-brand-blue-900 { background-color: var(--brand-blue-900); }

/* Enhanced semantic backgrounds */
.bg-brand-primary { background-color: var(--brand-bg-primary); }
.bg-brand-secondary { background-color: var(--brand-bg-secondary); }
.bg-brand-accent { background-color: var(--brand-bg-accent); }

/* Text Colors */
.text-brand-red { color: var(--brand-primary-red); }
.text-brand-grey { color: var(--brand-primary-grey); }
.text-brand-white { color: var(--brand-white); }
.text-brand-black { color: var(--brand-black); }

.text-brand-red-50 { color: var(--brand-red-50); }
.text-brand-red-100 { color: var(--brand-red-100); }
.text-brand-red-200 { color: var(--brand-red-200); }
.text-brand-red-300 { color: var(--brand-red-300); }
.text-brand-red-400 { color: var(--brand-red-400); }
.text-brand-red-500 { color: var(--brand-red-500); }
.text-brand-red-600 { color: var(--brand-red-600); }
.text-brand-red-700 { color: var(--brand-red-700); }
.text-brand-red-800 { color: var(--brand-red-800); }
.text-brand-red-900 { color: var(--brand-red-900); }

/* Blue text colors */
.text-brand-blue { color: var(--brand-blue-500); }
.text-brand-blue-50 { color: var(--brand-blue-50); }
.text-brand-blue-100 { color: var(--brand-blue-100); }
.text-brand-blue-200 { color: var(--brand-blue-200); }
.text-brand-blue-300 { color: var(--brand-blue-300); }
.text-brand-blue-400 { color: var(--brand-blue-400); }
.text-brand-blue-500 { color: var(--brand-blue-500); }
.text-brand-blue-600 { color: var(--brand-blue-600); }
.text-brand-blue-700 { color: var(--brand-blue-700); }
.text-brand-blue-800 { color: var(--brand-blue-800); }
.text-brand-blue-900 { color: var(--brand-blue-900); }

/* Enhanced semantic text colors for better readability */
.text-brand-primary { color: var(--brand-text-primary); }
.text-brand-secondary { color: var(--brand-text-secondary); }
.text-brand-muted { color: var(--brand-text-muted); }
.text-brand-inverse { color: var(--brand-text-inverse); }

/* Border Colors */
.border-brand-red { border-color: var(--brand-primary-red); }
.border-brand-grey { border-color: var(--brand-primary-grey); }
.border-brand-white { border-color: var(--brand-white); }
.border-brand-black { border-color: var(--brand-black); }

/* Blue border colors */
.border-brand-blue { border-color: var(--brand-blue-500); }
.border-brand-blue-200 { border-color: var(--brand-blue-200); }
.border-brand-blue-300 { border-color: var(--brand-blue-300); }
.border-brand-blue-400 { border-color: var(--brand-blue-400); }
.border-brand-blue-500 { border-color: var(--brand-blue-500); }
.border-brand-blue-600 { border-color: var(--brand-blue-600); }

/* ========================================
   TYPOGRAPHY UTILITIES
   ======================================== */

/* Font Families */
.font-english { font-family: var(--font-english); }
.font-chinese { font-family: var(--font-chinese); }
.font-mono { font-family: var(--font-mono); }

/* Font Weights */
.font-light { font-weight: var(--font-weight-light); }
.font-regular { font-weight: var(--font-weight-regular); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

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

/* Line Heights */
.leading-tight { line-height: var(--line-height-tight); }
.leading-snug { line-height: var(--line-height-snug); }
.leading-normal { line-height: var(--line-height-normal); }
.leading-relaxed { line-height: var(--line-height-relaxed); }
.leading-loose { line-height: var(--line-height-loose); }

/* ========================================
   VISUAL TONE UTILITIES
   ======================================== */

/* Approachable - Rounded Corners */
.rounded-brand-xs { border-radius: var(--radius-xs); }
.rounded-brand-sm { border-radius: var(--radius-sm); }
.rounded-brand { border-radius: var(--radius-md); }
.rounded-brand-lg { border-radius: var(--radius-lg); }
.rounded-brand-xl { border-radius: var(--radius-xl); }
.rounded-brand-full { border-radius: var(--radius-full); }

/* Modern - Shadows */
.shadow-brand-xs { box-shadow: var(--shadow-xs); }
.shadow-brand-sm { box-shadow: var(--shadow-sm); }
.shadow-brand { box-shadow: var(--shadow-md); }
.shadow-brand-lg { box-shadow: var(--shadow-lg); }
.shadow-brand-xl { box-shadow: var(--shadow-xl); }
.shadow-brand-colored { box-shadow: var(--shadow-brand); }

/* Lively - Spacing */
.space-brand-xs { gap: var(--spacing-xs); }
.space-brand-sm { gap: var(--spacing-sm); }
.space-brand { gap: var(--spacing-md); }
.space-brand-lg { gap: var(--spacing-lg); }
.space-brand-xl { gap: var(--spacing-xl); }
.space-brand-2xl { gap: var(--spacing-2xl); }

/* Transitions */
.transition-brand-fast { transition: all var(--transition-fast); }
.transition-brand { transition: all var(--transition-normal); }
.transition-brand-slow { transition: all var(--transition-slow); }

/* ========================================
   BRAND COMPONENT CLASSES
   ======================================== */

/* Primary Button */
.btn-brand-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-english);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: var(--line-height-tight);
  color: var(--brand-white);
  background-color: var(--brand-primary-red);
  border: 2px solid var(--brand-primary-red);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  min-height: 44px; /* Improved accessibility */
}

.btn-brand-primary:hover {
  background-color: var(--brand-red-600);
  border-color: var(--brand-red-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: var(--brand-white);
}

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

/* Secondary Button */
.btn-brand-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-english);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: var(--line-height-tight);
  color: var(--brand-primary-red);
  background-color: transparent;
  border: 2px solid var(--brand-primary-red);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  min-height: 44px; /* Improved accessibility */
}

.btn-brand-secondary:hover {
  background-color: var(--brand-primary-red);
  color: var(--brand-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* New Blue Button Variants */
.btn-brand-blue {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-english);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: var(--line-height-tight);
  color: var(--brand-white);
  background-color: var(--brand-blue-500);
  border: 2px solid var(--brand-blue-500);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  min-height: 44px;
}

.btn-brand-blue:hover {
  background-color: var(--brand-blue-600);
  border-color: var(--brand-blue-600);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: var(--brand-white);
}

.btn-brand-blue-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-english);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: var(--line-height-tight);
  color: var(--brand-blue-600);
  background-color: transparent;
  border: 2px solid var(--brand-blue-500);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  min-height: 44px;
}

.btn-brand-blue-outline:hover {
  background-color: var(--brand-blue-500);
  color: var(--brand-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* Brand Card */
.card-brand {
  background-color: var(--brand-white);
  border: 1px solid var(--brand-grey-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.card-brand:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--brand-grey-300);
}

.card-brand-blue {
  background-color: var(--brand-blue-50);
  border: 1px solid var(--brand-blue-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.card-brand-blue:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--brand-blue-300);
  background-color: var(--brand-blue-100);
}

/* Brand Input */
.input-brand {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-english);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--brand-text-primary);
  background-color: var(--brand-white);
  border: 2px solid var(--brand-grey-300);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  min-height: 44px; /* Improved accessibility */
}

.input-brand:focus {
  outline: none;
  border-color: var(--brand-blue-500);
  box-shadow: 0 0 0 3px rgba(115, 159, 232, 0.1);
  background-color: var(--brand-white);
}

.input-brand::placeholder {
  color: var(--brand-text-muted);
}

/* Brand Navigation Link */
.nav-link-brand {
  position: relative;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--brand-primary-grey);
  font-family: var(--font-english);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  text-decoration: none;
  transition: all var(--transition-normal);
}

.nav-link-brand::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--brand-primary-red);
  transition: width var(--transition-normal);
}

.nav-link-brand:hover {
  color: var(--brand-primary-red);
}

.nav-link-brand:hover::before {
  width: 100%;
}

/* ========================================
   BRAND PATTERN ELEMENTS (輔助圖形)
   ======================================== */

/* Linear Wave Pattern */
.pattern-wave {
  background-image: linear-gradient(
    45deg,
    var(--brand-red-100) 25%,
    transparent 25%,
    transparent 75%,
    var(--brand-red-100) 75%
  );
  background-size: 20px 20px;
}

/* Diagonal Stripes */
.pattern-diagonal {
  background-image: repeating-linear-gradient(
    45deg,
    var(--brand-red-50),
    var(--brand-red-50) 10px,
    var(--brand-red-100) 10px,
    var(--brand-red-100) 20px
  );
}

/* Geometric Dots */
.pattern-dots {
  background-image: radial-gradient(
    circle at 2px 2px,
    var(--brand-red-300) 1px,
    transparent 0
  );
  background-size: 20px 20px;
}

/* Brand Gradient Backgrounds */
.bg-brand-gradient-primary {
  background: linear-gradient(135deg, var(--brand-red-400) 0%, var(--brand-red-600) 100%);
}

.bg-brand-gradient-soft {
  background: linear-gradient(135deg, var(--brand-red-50) 0%, var(--brand-red-100) 100%);
}

.bg-brand-gradient-vibrant {
  background: linear-gradient(135deg, var(--brand-red-500) 0%, var(--brand-red-700) 50%, var(--brand-red-800) 100%);
}

/* New Blue Gradients */
.bg-brand-gradient-blue {
  background: linear-gradient(135deg, var(--brand-blue-400) 0%, var(--brand-blue-600) 100%);
}

.bg-brand-gradient-blue-soft {
  background: linear-gradient(135deg, var(--brand-blue-50) 0%, var(--brand-blue-100) 100%);
}

.bg-brand-gradient-mixed {
  background: linear-gradient(135deg, var(--brand-blue-500) 0%, var(--brand-red-500) 100%);
}

/* ========================================
   RESPONSIVE UTILITIES
   ======================================== */

/* Mobile-first responsive breakpoints */
@media (min-width: 640px) {
  .sm\:text-brand-lg { font-size: var(--font-size-lg); }
  .sm\:rounded-brand-lg { border-radius: var(--radius-lg); }
}

@media (min-width: 768px) {
  .md\:text-brand-xl { font-size: var(--font-size-xl); }
  .md\:rounded-brand-xl { border-radius: var(--radius-xl); }
}

@media (min-width: 1024px) {
  .lg\:text-brand-2xl { font-size: var(--font-size-2xl); }
}

@media (min-width: 1280px) {
  .xl\:text-brand-3xl { font-size: var(--font-size-3xl); }
}

/* ========================================
   ACCESSIBILITY & PRINT STYLES
   ======================================== */

/* High contrast mode support - Enhanced */
@media (prefers-contrast: high) {
  :root {
    --brand-primary-red: #CC0000;
    --brand-primary-grey: #000000;
    --brand-blue-500: #0066CC;
    --brand-text-primary: #000000;
    --brand-text-secondary: #333333;
  }
  
  .btn-brand-primary,
  .btn-brand-blue {
    border-width: 3px;
  }
  
  .input-brand:focus {
    border-width: 3px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .transition-brand-fast,
  .transition-brand,
  .transition-brand-slow {
    transition: none;
  }
  
  .btn-brand-primary:hover,
  .btn-brand-secondary:hover,
  .card-brand:hover {
    transform: none;
  }
}

/* Print styles */
@media print {
  .btn-brand-primary,
  .btn-brand-secondary {
    background-color: transparent !important;
    color: var(--brand-black) !important;
    border: 2px solid var(--brand-black) !important;
    box-shadow: none !important;
  }
  
  .card-brand {
    box-shadow: none !important;
    border: 1px solid var(--brand-black) !important;
  }
  
  .pattern-wave,
  .pattern-diagonal,
  .pattern-dots {
    background-image: none !important;
  }
}

/* ========================================
   DARK MODE SUPPORT
   ======================================== */

@media (prefers-color-scheme: dark) {
  :root {
    --brand-white: #1A202C;
    --brand-black: #FFFFFF;
    --brand-grey-50: #374151;
    --brand-grey-100: #4B5563;
    --brand-grey-200: #6B7280;
    --brand-grey-300: #9CA3AF;
    --brand-bg-primary: #1A202C;
    --brand-bg-secondary: #2D3748;
    --brand-bg-accent: #2A4365;
    --brand-text-primary: #FFFFFF;
    --brand-text-secondary: #E2E8F0;
    --brand-text-muted: #A0AEC0;
  }
  
  .card-brand {
    background-color: var(--brand-grey-800);
    border-color: var(--brand-grey-700);
  }
  
  .card-brand-blue {
    background-color: var(--brand-blue-900);
    border-color: var(--brand-blue-700);
  }
  
  .input-brand {
    background-color: var(--brand-grey-800);
    border-color: var(--brand-grey-600);
    color: var(--brand-white);
  }
  
  .input-brand:focus {
    border-color: var(--brand-blue-400);
    background-color: var(--brand-grey-700);
  }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

/* Brand-specific utility classes */
.brand-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.brand-section {
  padding: var(--spacing-4xl) 0;
}

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

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

.brand-text-center {
  text-align: center;
}

/* Animation utilities */
@keyframes brand-fade-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes brand-slide-in {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-brand-fade-in {
  animation: brand-fade-in 0.6s ease-out;
}

.animate-brand-slide-in {
  animation: brand-slide-in 0.6s ease-out;
}

/* Focus styles for accessibility */
.focus-brand:focus {
  outline: 2px solid var(--brand-primary-red);
  outline-offset: 2px;
}

/* 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;
}

/* Enhanced focus styles for better accessibility */
.focus-brand:focus,
.btn-brand-primary:focus,
.btn-brand-secondary:focus,
.btn-brand-blue:focus,
.btn-brand-blue-outline:focus,
.input-brand:focus {
  outline: 3px solid var(--brand-blue-400);
  outline-offset: 2px;
}

/* Improved text contrast utilities */
.text-high-contrast {
  color: var(--brand-black);
  text-shadow: none;
}

.text-medium-contrast {
  color: var(--brand-grey-700);
}

.text-low-contrast {
  color: var(--brand-grey-500);
}

/* Background contrast helpers */
.bg-high-contrast {
  background-color: var(--brand-white);
  color: var(--brand-black);
}

.bg-medium-contrast {
  background-color: var(--brand-grey-50);
  color: var(--brand-grey-800);
}