/* ============================================
   BUILDING INTELLIGENCE — Design System
   Building Safety, Compliance, Resilience & ESG
   ============================================ */

/* Google Fonts loaded via <link> in header.php — no @import needed */

/* ============================================
   1. DESIGN TOKENS (CSS Custom Properties)
   ============================================ */
:root {
  /* Brand Colors */
  --bi-charcoal: #1a1d23;
  --bi-midnight: #0f1629;
  --bi-steel: #6b7280;
  --bi-offwhite: #f8f6f3;
  --bi-amber: #e8a317;
  --bi-green: #2d8a4e;
  --bi-cyan: #00b4d8;
  --bi-cyan-light: #48cae4;
  --bi-cyan-dark: #0096c7;

  /* Neutral Scale */
  --bi-neutral-50: #f9fafb;
  --bi-neutral-100: #f3f4f6;
  --bi-neutral-200: #e5e7eb;
  --bi-neutral-300: #d1d5db;
  --bi-neutral-400: #9ca3af;
  --bi-neutral-500: #6b7280;
  --bi-neutral-600: #4b5563;
  --bi-neutral-700: #374151;
  --bi-neutral-800: #1f2937;
  --bi-neutral-900: #111827;
  --bi-neutral-950: #0a0c10;

  /* Primary Scale */
  --bi-primary-50: #ecfeff;
  --bi-primary-100: #cffafe;
  --bi-primary-200: #a5f3fc;
  --bi-primary-300: #67e8f9;
  --bi-primary-400: #22d3ee;
  --bi-primary-500: #00b4d8;
  --bi-primary-600: #0096c7;
  --bi-primary-700: #0077b6;
  --bi-primary-800: #005f8a;
  --bi-primary-900: #004d6d;

  /* Semantic */
  --bi-success: #2d8a4e;
  --bi-success-light: #d1fae5;
  --bi-warning: #e8a317;
  --bi-warning-light: #fef3c7;
  --bi-danger: #dc2626;
  --bi-danger-light: #fee2e2;
  --bi-info: #00b4d8;
  --bi-info-light: #cffafe;

  /* Risk Indicators */
  --bi-risk-critical: #dc2626;
  --bi-risk-high: #ea580c;
  --bi-risk-medium: #e8a317;
  --bi-risk-low: #2d8a4e;
  --bi-risk-info: #00b4d8;

  /* Evidence Confidence */
  --bi-evidence-verified: #2d8a4e;
  --bi-evidence-partial: #e8a317;
  --bi-evidence-unverified: #9ca3af;
  --bi-evidence-disputed: #dc2626;

  /* Spacing */
  --bi-space-xs: 0.25rem;
  --bi-space-sm: 0.5rem;
  --bi-space-md: 1rem;
  --bi-space-lg: 1.5rem;
  --bi-space-xl: 2rem;
  --bi-space-2xl: 3rem;
  --bi-space-3xl: 4rem;
  --bi-space-4xl: 6rem;
  --bi-space-5xl: 8rem;

  /* Typography */
  --bi-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --bi-font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --bi-font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  --bi-text-xs: 0.75rem;
  --bi-text-sm: 0.875rem;
  --bi-text-base: 1rem;
  --bi-text-lg: 1.125rem;
  --bi-text-xl: 1.25rem;
  --bi-text-2xl: 1.5rem;
  --bi-text-3xl: 1.875rem;
  --bi-text-4xl: 2.25rem;
  --bi-text-5xl: 3rem;
  --bi-text-display: clamp(2.5rem, 5vw, 4rem);
  --bi-leading-tight: 1.15;
  --bi-leading-snug: 1.3;
  --bi-leading-normal: 1.6;
  --bi-leading-relaxed: 1.75;

  /* Borders */
  --bi-radius-sm: 4px;
  --bi-radius-md: 8px;
  --bi-radius-lg: 12px;
  --bi-radius-xl: 16px;
  --bi-radius-2xl: 24px;
  --bi-radius-full: 9999px;

  /* Shadows */
  --bi-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --bi-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --bi-shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --bi-shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --bi-shadow-inner: inset 0 2px 4px rgba(0,0,0,0.06);
  --bi-shadow-glow: 0 0 20px rgba(0,180,216,0.15);
  --bi-shadow-glow-strong: 0 0 30px rgba(0,180,216,0.25);

  /* Transitions */
  --bi-transition-fast: 150ms ease;
  --bi-transition-base: 250ms ease;
  --bi-transition-slow: 400ms ease;

  /* Z-Index */
  --bi-z-dropdown: 100;
  --bi-z-sticky: 200;
  --bi-z-fixed: 300;
  --bi-z-modal-backdrop: 400;
  --bi-z-modal: 500;
  --bi-z-tooltip: 600;
  --bi-z-toast: 700;

  /* Containers */
  --bi-container-sm: 640px;
  --bi-container-md: 768px;
  --bi-container-lg: 1024px;
  --bi-container-xl: 1200px;
  --bi-container-2xl: 1400px;
}

/* ============================================
   2. RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

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

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

body {
  font-family: var(--bi-font-sans);
  font-size: var(--bi-text-base);
  line-height: var(--bi-leading-normal);
  color: var(--bi-neutral-900);
  background-color: var(--bi-offwhite);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background: rgba(0, 180, 216, 0.2);
  color: var(--bi-charcoal);
}

:focus-visible {
  outline: 2px solid var(--bi-cyan);
  outline-offset: 2px;
}

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

a {
  color: var(--bi-cyan-dark);
  text-decoration: none;
  transition: color var(--bi-transition-fast);
}
a:hover { color: var(--bi-cyan); }

ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--bi-cyan);
  color: var(--bi-charcoal);
  font-weight: 600;
  border-radius: var(--bi-radius-md);
  z-index: 9999;
  transition: top var(--bi-transition-fast);
}
.skip-link:focus {
  top: 1rem;
  color: var(--bi-charcoal);
}

/* ============================================
   3. TYPOGRAPHY
   ============================================ */
h1, h2, h3 { font-family: var(--bi-font-serif); }
h4, h5, h6 { font-family: var(--bi-font-sans); }

h1 {
  font-size: var(--bi-text-display);
  font-weight: 700;
  line-height: var(--bi-leading-tight);
  letter-spacing: -0.02em;
  color: var(--bi-charcoal);
}
h2 {
  font-size: var(--bi-text-4xl);
  font-weight: 600;
  line-height: var(--bi-leading-snug);
  letter-spacing: -0.01em;
  color: var(--bi-charcoal);
  margin-bottom: var(--bi-space-md);
}
h3 {
  font-size: var(--bi-text-2xl);
  font-weight: 600;
  line-height: var(--bi-leading-snug);
  color: var(--bi-charcoal);
  margin-bottom: var(--bi-space-sm);
}
h4 {
  font-size: var(--bi-text-xl);
  font-weight: 600;
  line-height: var(--bi-leading-snug);
  margin-bottom: var(--bi-space-sm);
}
h5 {
  font-size: var(--bi-text-lg);
  font-weight: 600;
  line-height: var(--bi-leading-snug);
}
h6 {
  font-size: var(--bi-text-base);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--bi-cyan), var(--bi-primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.font-sans { font-family: var(--bi-font-sans); }
.font-serif { font-family: var(--bi-font-serif); }
.font-mono { font-family: var(--bi-font-mono); }
.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

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

.tracking-tight { letter-spacing: -0.02em; }
.tracking-normal { letter-spacing: 0; }
.tracking-wide { letter-spacing: 0.05em; }
.tracking-wider { letter-spacing: 0.1em; }

.text-uppercase { text-transform: uppercase; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: var(--bi-neutral-500); }
.text-accent { color: var(--bi-cyan); }
.text-white { color: #fff; }
.text-charcoal { color: var(--bi-charcoal); }
.text-success { color: var(--bi-success); }
.text-warning { color: var(--bi-warning); }
.text-danger { color: var(--bi-danger); }

/* ============================================
   4. LAYOUT
   ============================================ */
.container {
  max-width: var(--bi-container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--bi-space-lg);
  padding-right: var(--bi-space-lg);
}
.container-narrow { max-width: 800px; margin-left: auto; margin-right: auto; padding-left: var(--bi-space-lg); padding-right: var(--bi-space-lg); }
.container-wide { max-width: var(--bi-container-2xl); margin-left: auto; margin-right: auto; padding-left: var(--bi-space-lg); padding-right: var(--bi-space-lg); }

.section { padding: var(--bi-space-5xl) 0; }
.section-sm { padding: var(--bi-space-3xl) 0; }
.section-xs { padding: var(--bi-space-2xl) 0; }

.grid { display: grid; gap: var(--bi-space-xl); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

@media (max-width: 991px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 575px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: var(--bi-space-3xl) 0; }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--bi-space-xs); }
.gap-sm { gap: var(--bi-space-sm); }
.gap-md { gap: var(--bi-space-md); }
.gap-lg { gap: var(--bi-space-lg); }
.gap-xl { gap: var(--bi-space-xl); }
.gap-2xl { gap: var(--bi-space-2xl); }
.gap-3xl { gap: var(--bi-space-3xl); }

/* ============================================
   5. NAVBAR — Bootstrap overrides
   ============================================ */
.bi-navbar {
  background: rgba(15, 22, 41, 0.97) !important;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding-top: 0.2rem !important;
  padding-bottom: 0.2rem !important;
  transition: background 0.3s, box-shadow 0.3s;
}
.bi-navbar.scrolled {
  background: rgba(15, 22, 41, 0.99) !important;
  box-shadow: 0 4px 40px rgba(0,0,0,0.4);
}

/* Navbar brand */
.bi-navbar .navbar-brand {
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
  white-space: nowrap;
  line-height: 1.1;
}

/* Nav links */
.bi-navbar .nav-link {
  font-size: 0.73rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  padding: 0.5rem 0.5rem !important;
  color: rgba(255,255,255,0.75) !important;
  transition: color 0.2s;
}
.bi-navbar .nav-link:hover,
.bi-navbar .nav-link:focus {
  color: var(--bi-cyan) !important;
}
/* Dropdown dark styling */
.bi-navbar .dropdown-menu-dark {
  background: #151821;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 15px 50px rgba(0,0,0,0.5);
  border-radius: 0 0 10px 10px;
  padding: 0.4rem 0;
}
.bi-navbar .dropdown-menu-dark .dropdown-item {
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
  padding: 0.45rem 1.1rem;
}
.bi-navbar .dropdown-menu-dark .dropdown-item:hover,
.bi-navbar .dropdown-menu-dark .dropdown-item:focus {
  background: rgba(0,180,216,0.08);
  color: var(--bi-cyan);
}
.bi-navbar .dropdown-menu-dark .dropdown-header {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem 1.1rem 0.2rem;
}
.bi-navbar .dropdown-menu-dark .dropdown-divider {
  border-color: rgba(255,255,255,0.06);
}
/* CTA button in nav */
.bi-nav-cta-btn {
  display: inline-flex !important;
  align-items: center;
  background: #00b4d8 !important;
  color: #0f1629 !important;
  font-size: 0.78rem !important;
  font-weight: 700 !important;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid #00b4d8 !important;
  padding: 0.45rem 1rem !important;
  border-radius: 6px !important;
  white-space: nowrap;
  transition: all 0.2s;
  opacity: 1 !important;
  visibility: visible !important;
}
.bi-nav-cta-btn:hover {
  background: var(--bi-cyan-light) !important;
  box-shadow: 0 0 20px rgba(0,180,216,0.3);
}
/* Hover-open dropdowns on desktop */
@media (min-width: 1200px) {
  .bi-navbar .dropdown:hover > .dropdown-menu { display: block; }
  .bi-navbar .nav-link { font-size: 0.73rem; padding: 0.5rem 0.55rem !important; }
}
@media (max-width: 1199.98px) {
  .bi-navbar .nav-link { font-size: 0.7rem; padding: 0.5rem 0.4rem !important; }
}

/* Body offset for fixed nav */
body { padding-top: 62px; }

/* ============================================
   6. HERO SECTION
   ============================================ */
.bi-hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background: linear-gradient(165deg, var(--bi-midnight) 0%, var(--bi-charcoal) 50%, #1a2332 100%);
  overflow: hidden;
  margin-top: -62px;
  padding-top: 62px;
}
.bi-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 60px, rgba(255,255,255,0.015) 60px, rgba(255,255,255,0.015) 61px),
    repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(255,255,255,0.015) 60px, rgba(255,255,255,0.015) 61px);
  pointer-events: none;
}
.bi-hero::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,180,216,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.bi-hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
}
.bi-hero-title {
  font-family: var(--bi-font-serif);
  font-size: var(--bi-text-display);
  font-weight: 700;
  color: #fff;
  line-height: var(--bi-leading-tight);
  margin-bottom: var(--bi-space-lg);
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.bi-hero-title .highlight {
  color: var(--bi-cyan);
}
.bi-hero-subtitle {
  font-size: var(--bi-text-xl);
  color: var(--bi-neutral-300);
  line-height: var(--bi-leading-normal);
  max-width: 620px;
  margin-bottom: var(--bi-space-2xl);
}
.bi-hero-cta {
  display: flex;
  gap: var(--bi-space-md);
  flex-wrap: wrap;
}
.bi-hero-visual {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  max-width: 600px;
  opacity: 0.15;
  pointer-events: none;
}

/* Floating geometric shapes */
.bi-hero-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.bi-hero-shape {
  position: absolute;
  border: 1px solid rgba(0,180,216,0.08);
  border-radius: 4px;
}
.bi-hero-shape:nth-child(1) {
  width: 120px; height: 120px;
  top: 15%; right: 10%;
  transform: rotate(30deg);
  animation: float 8s ease-in-out infinite;
}
.bi-hero-shape:nth-child(2) {
  width: 80px; height: 80px;
  top: 60%; right: 25%;
  transform: rotate(-15deg);
  animation: float 6s ease-in-out infinite 1s;
}
.bi-hero-shape:nth-child(3) {
  width: 60px; height: 60px;
  top: 30%; right: 35%;
  transform: rotate(45deg);
  animation: float 10s ease-in-out infinite 2s;
}
.bi-hero-shape:nth-child(4) {
  width: 200px; height: 200px;
  bottom: 10%; right: 5%;
  border-radius: 50%;
  border-color: rgba(0,180,216,0.04);
  animation: float 12s ease-in-out infinite 0.5s;
}

/* Sub-page hero */
.bi-page-hero {
  position: relative;
  padding: var(--bi-space-4xl) 0 var(--bi-space-3xl);
  background: linear-gradient(165deg, var(--bi-midnight) 0%, var(--bi-charcoal) 100%);
  margin-top: -72px;
  padding-top: calc(62px + var(--bi-space-4xl));
  overflow: hidden;
}
.bi-page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 80px, rgba(255,255,255,0.01) 80px, rgba(255,255,255,0.01) 81px),
    repeating-linear-gradient(90deg, transparent, transparent 80px, rgba(255,255,255,0.01) 80px, rgba(255,255,255,0.01) 81px);
  pointer-events: none;
}
.bi-page-hero h1 { color: #fff; margin-bottom: var(--bi-space-md); position: relative; }
.bi-page-hero p { color: var(--bi-neutral-300); font-size: var(--bi-text-lg); max-width: 700px; position: relative; }

/* ============================================
   7. BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--bi-radius-md);
  font-family: var(--bi-font-sans);
  font-weight: 600;
  font-size: var(--bi-text-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--bi-transition-base);
  text-decoration: none;
  line-height: 1.4;
}
.btn-primary {
  background: var(--bi-cyan);
  color: var(--bi-charcoal);
  border-color: var(--bi-cyan);
}
.btn-primary:hover {
  background: var(--bi-cyan-dark);
  border-color: var(--bi-cyan-dark);
  color: #fff;
  box-shadow: 0 4px 15px rgba(0,180,216,0.3);
}
.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}
.btn-secondary:hover {
  background: #fff;
  color: var(--bi-charcoal);
  border-color: #fff;
}
.btn-dark {
  background: var(--bi-charcoal);
  color: #fff;
  border-color: var(--bi-charcoal);
}
.btn-dark:hover {
  background: var(--bi-neutral-800);
  border-color: var(--bi-neutral-800);
  color: #fff;
}
.btn-accent {
  background: var(--bi-amber);
  color: var(--bi-charcoal);
  border-color: var(--bi-amber);
}
.btn-accent:hover {
  background: #d4940f;
  border-color: #d4940f;
}
.btn-ghost {
  background: transparent;
  color: var(--bi-cyan);
  border-color: transparent;
}
.btn-ghost:hover {
  background: rgba(0,180,216,0.1);
}
.btn-outline-primary {
  background: transparent;
  color: var(--bi-cyan);
  border-color: var(--bi-cyan);
}
.btn-outline-primary:hover {
  background: var(--bi-cyan);
  color: var(--bi-charcoal);
}
.btn-outline-dark {
  background: transparent;
  color: var(--bi-charcoal);
  border-color: var(--bi-charcoal);
}
.btn-outline-dark:hover {
  background: var(--bi-charcoal);
  color: #fff;
}
.btn-sm { padding: 0.5rem 1.25rem; font-size: var(--bi-text-xs); }
.btn-lg { padding: 1rem 2.25rem; font-size: var(--bi-text-base); }
.btn-icon { padding: 0.6rem; border-radius: var(--bi-radius-md); }

.btn .btn-arrow {
  transition: transform var(--bi-transition-base);
}
.btn:hover .btn-arrow { transform: translateX(4px); }

.btn-group { display: flex; gap: var(--bi-space-sm); flex-wrap: wrap; }

/* ============================================
   8. CARDS
   ============================================ */
.bi-card {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  box-shadow: var(--bi-shadow-md);
  overflow: hidden;
  transition: transform var(--bi-transition-base), box-shadow var(--bi-transition-base);
}
.bi-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--bi-shadow-xl);
}
.bi-card-header {
  padding: var(--bi-space-lg);
  border-bottom: 1px solid var(--bi-neutral-100);
}
.bi-card-body { padding: var(--bi-space-lg); }
.bi-card-footer {
  padding: var(--bi-space-md) var(--bi-space-lg);
  border-top: 1px solid var(--bi-neutral-100);
  background: var(--bi-neutral-50);
}
.bi-card-image {
  aspect-ratio: 16/9;
  object-fit: cover;
  width: 100%;
}
.bi-card-featured {
  border-top: 3px solid var(--bi-cyan);
}
.bi-card-dark {
  background: var(--bi-neutral-800);
  color: #fff;
}
.bi-card-dark:hover {
  box-shadow: var(--bi-shadow-glow);
}
.bi-card-dark .bi-card-footer {
  background: var(--bi-neutral-900);
  border-color: var(--bi-neutral-700);
}
.bi-card-interactive {
  cursor: pointer;
}
.bi-card-interactive:hover {
  transform: translateY(-4px) scale(1.01);
}
.bi-card-stat {
  text-align: center;
  padding: var(--bi-space-2xl);
}
.bi-card-stat .stat-number {
  font-size: var(--bi-text-4xl);
  font-weight: 700;
  color: var(--bi-cyan);
  line-height: 1;
  margin-bottom: var(--bi-space-sm);
}
.bi-card-stat .stat-label {
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.bi-card-article .bi-card-body { padding: var(--bi-space-lg); }
.bi-card-article .article-meta {
  display: flex;
  gap: var(--bi-space-md);
  font-size: var(--bi-text-xs);
  color: var(--bi-neutral-500);
  margin-bottom: var(--bi-space-sm);
}
.bi-card-article h3 {
  font-size: var(--bi-text-xl);
  margin-bottom: var(--bi-space-sm);
}
.bi-card-article h3 a {
  color: var(--bi-charcoal);
  text-decoration: none;
}
.bi-card-article h3 a:hover { color: var(--bi-cyan); }
.bi-card-article p {
  color: var(--bi-neutral-600);
  font-size: var(--bi-text-sm);
  line-height: var(--bi-leading-relaxed);
}

/* Dimension Card */
.bi-card-dimension {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  padding: var(--bi-space-lg);
  border-left: 4px solid var(--bi-neutral-200);
  box-shadow: var(--bi-shadow-sm);
  transition: all var(--bi-transition-base);
  cursor: default;
}
.bi-card-dimension:hover {
  transform: translateX(4px);
  box-shadow: var(--bi-shadow-lg);
}
.bi-card-dimension .dimension-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  border-radius: var(--bi-radius-md);
  background: var(--bi-neutral-50);
  margin-bottom: var(--bi-space-md);
}
.bi-card-dimension .dimension-title {
  font-weight: 600;
  font-size: var(--bi-text-lg);
  margin-bottom: var(--bi-space-xs);
  color: var(--bi-charcoal);
}
.bi-card-dimension .dimension-desc {
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-600);
  line-height: var(--bi-leading-normal);
}

/* Dimension colors */
.bi-dim-legal { border-left-color: #6366f1; }
.bi-dim-legal .dimension-icon { color: #6366f1; background: #eef2ff; }
.bi-dim-structural { border-left-color: #dc2626; }
.bi-dim-structural .dimension-icon { color: #dc2626; background: #fef2f2; }
.bi-dim-fire { border-left-color: #ea580c; }
.bi-dim-fire .dimension-icon { color: #ea580c; background: #fff7ed; }
.bi-dim-electrical { border-left-color: #eab308; }
.bi-dim-electrical .dimension-icon { color: #eab308; background: #fefce8; }
.bi-dim-mechanical { border-left-color: #0891b2; }
.bi-dim-mechanical .dimension-icon { color: #0891b2; background: #ecfeff; }
.bi-dim-water { border-left-color: #2563eb; }
.bi-dim-water .dimension-icon { color: #2563eb; background: #eff6ff; }
.bi-dim-accessibility { border-left-color: #7c3aed; }
.bi-dim-accessibility .dimension-icon { color: #7c3aed; background: #f5f3ff; }
.bi-dim-environment { border-left-color: #16a34a; }
.bi-dim-environment .dimension-icon { color: #16a34a; background: #f0fdf4; }
.bi-dim-security { border-left-color: #475569; }
.bi-dim-security .dimension-icon { color: #475569; background: #f1f5f9; }
.bi-dim-continuity { border-left-color: #be185d; }
.bi-dim-continuity .dimension-icon { color: #be185d; background: #fdf2f8; }
.bi-dim-maintenance { border-left-color: #b45309; }
.bi-dim-maintenance .dimension-icon { color: #b45309; background: #fffbeb; }
.bi-dim-governance { border-left-color: var(--bi-cyan); }
.bi-dim-governance .dimension-icon { color: var(--bi-cyan); background: var(--bi-primary-50); }

/* ============================================
   9. TAGS & BADGES
   ============================================ */
.bi-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  border-radius: var(--bi-radius-full);
  font-size: var(--bi-text-xs);
  font-weight: 500;
  line-height: 1.5;
  gap: 0.25rem;
}
.bi-tag-primary { background: var(--bi-primary-100); color: var(--bi-primary-700); }
.bi-tag-success { background: var(--bi-success-light); color: var(--bi-success); }
.bi-tag-warning { background: var(--bi-warning-light); color: #92400e; }
.bi-tag-danger { background: var(--bi-danger-light); color: var(--bi-danger); }
.bi-tag-info { background: var(--bi-info-light); color: var(--bi-primary-800); }
.bi-tag-dark { background: var(--bi-neutral-700); color: #fff; }
.bi-tag-outline { background: transparent; border: 1px solid currentColor; }
.bi-tag-sm { padding: 0.1rem 0.5rem; font-size: 0.65rem; }
.bi-tag-lg { padding: 0.35rem 1rem; font-size: var(--bi-text-sm); }

.bi-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: var(--bi-radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================
   10. RISK & EVIDENCE INDICATORS
   ============================================ */
.bi-risk-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.5rem;
}
.bi-risk-dot.critical { background: var(--bi-risk-critical); }
.bi-risk-dot.high { background: var(--bi-risk-high); }
.bi-risk-dot.medium { background: var(--bi-risk-medium); }
.bi-risk-dot.low { background: var(--bi-risk-low); }
.bi-risk-dot.info { background: var(--bi-risk-info); }

.bi-risk-bar {
  height: 4px;
  border-radius: 2px;
  background: var(--bi-neutral-200);
  overflow: hidden;
}
.bi-risk-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width var(--bi-transition-slow);
}
.bi-risk-bar-fill.critical { background: var(--bi-risk-critical); }
.bi-risk-bar-fill.high { background: var(--bi-risk-high); }
.bi-risk-bar-fill.medium { background: var(--bi-risk-medium); }
.bi-risk-bar-fill.low { background: var(--bi-risk-low); }

.bi-evidence-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--bi-radius-full);
  font-size: var(--bi-text-xs);
  font-weight: 500;
}
.bi-evidence-verified { background: var(--bi-success-light); color: var(--bi-evidence-verified); }
.bi-evidence-partial { background: var(--bi-warning-light); color: #92400e; }
.bi-evidence-unverified { background: var(--bi-neutral-100); color: var(--bi-neutral-600); }
.bi-evidence-disputed { background: var(--bi-danger-light); color: var(--bi-evidence-disputed); }

/* ============================================
   11. SECTION STYLES
   ============================================ */
.bi-section-dark {
  background: var(--bi-charcoal);
  color: #fff;
}
.bi-section-dark h2, .bi-section-dark h3 { color: #fff; }
.bi-section-dark p { color: var(--bi-neutral-300); }

.bi-section-light { background: var(--bi-offwhite); }
.bi-section-white { background: #fff; }

.bi-section-gradient {
  background: linear-gradient(165deg, var(--bi-midnight) 0%, var(--bi-charcoal) 100%);
  color: #fff;
}
.bi-section-gradient h2 { color: #fff; }
.bi-section-gradient p { color: var(--bi-neutral-300); }

.bi-section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--bi-space-3xl);
}
.bi-section-label {
  display: inline-block;
  font-size: var(--bi-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--bi-cyan);
  margin-bottom: var(--bi-space-sm);
}
.bi-section-header p {
  font-size: var(--bi-text-lg);
  color: var(--bi-neutral-600);
  margin-top: var(--bi-space-md);
}
.bi-section-dark .bi-section-header p { color: var(--bi-neutral-300); }

.bi-section-engineering {
  position: relative;
}
.bi-section-engineering::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(0,0,0,0.02) 40px, rgba(0,0,0,0.02) 41px),
    repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(0,0,0,0.02) 40px, rgba(0,0,0,0.02) 41px);
  pointer-events: none;
}

/* ============================================
   12. ARTICLE STYLES
   ============================================ */
.bi-article-hero {
  position: relative;
  padding: var(--bi-space-4xl) 0 var(--bi-space-2xl);
  background: linear-gradient(165deg, var(--bi-midnight) 0%, var(--bi-charcoal) 100%);
  margin-top: -72px;
  padding-top: calc(62px + var(--bi-space-4xl));
}
.bi-article-hero h1 { color: #fff; font-size: var(--bi-text-5xl); max-width: 800px; }

.bi-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--bi-space-lg);
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-400);
  margin-top: var(--bi-space-lg);
}
.bi-article-meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.bi-article-meta-item i { font-size: 0.9rem; }

.bi-article-layout {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: var(--bi-space-2xl);
  align-items: start;
}
.bi-article-main { min-width: 0; }
@media (max-width: 991px) {
  .bi-article-layout { grid-template-columns: 1fr; }
  .bi-article-sidebar { display: none; }
}

.bi-article-sidebar {
  position: sticky;
  top: 90px;
}

/* Table of Contents */
.bi-toc {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  padding: var(--bi-space-lg);
  box-shadow: var(--bi-shadow-md);
}
.bi-toc h4 {
  font-size: var(--bi-text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bi-neutral-500);
  margin-bottom: var(--bi-space-md);
}
.bi-toc-list {
  border-left: 2px solid var(--bi-neutral-200);
}
.bi-toc-list a {
  display: block;
  padding: 0.4rem 0 0.4rem var(--bi-space-md);
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-600);
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: all var(--bi-transition-fast);
}
.bi-toc-list a:hover,
.bi-toc-list a.active {
  color: var(--bi-cyan);
  border-left-color: var(--bi-cyan);
}

/* Prose */
.prose { max-width: 780px; }
.prose p { margin-bottom: var(--bi-space-lg); line-height: var(--bi-leading-relaxed); color: var(--bi-neutral-700); }
.prose h2 { margin-top: var(--bi-space-3xl); margin-bottom: var(--bi-space-lg); }
.prose h3 { margin-top: var(--bi-space-2xl); margin-bottom: var(--bi-space-md); }
.prose ul, .prose ol { margin-bottom: var(--bi-space-lg); padding-left: var(--bi-space-xl); }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: var(--bi-space-sm); line-height: var(--bi-leading-relaxed); color: var(--bi-neutral-700); }
.prose a { color: var(--bi-cyan-dark); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--bi-cyan); }
.prose a.bi-glossary-link { text-decoration-style: dotted; text-decoration-color: var(--bi-neutral-400); }
.prose a.bi-glossary-link:hover { text-decoration-style: solid; text-decoration-color: var(--bi-cyan); }
.prose blockquote {
  border-left: 4px solid var(--bi-cyan);
  padding: var(--bi-space-md) var(--bi-space-lg);
  background: var(--bi-neutral-50);
  border-radius: 0 var(--bi-radius-md) var(--bi-radius-md) 0;
  margin: var(--bi-space-xl) 0;
  font-style: italic;
  color: var(--bi-neutral-600);
}
.prose img { border-radius: var(--bi-radius-lg); margin: var(--bi-space-xl) 0; }
.prose table { margin: var(--bi-space-xl) 0; }
.prose table th {
  background: var(--bi-neutral-50);
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: var(--bi-text-sm);
  border-bottom: 2px solid var(--bi-neutral-200);
}
.prose table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--bi-neutral-100);
  font-size: var(--bi-text-sm);
}

/* Callouts */
.bi-callout {
  padding: var(--bi-space-lg);
  border-radius: var(--bi-radius-md);
  margin: var(--bi-space-xl) 0;
  border-left: 4px solid var(--bi-cyan);
  background: var(--bi-primary-50);
}
.bi-callout-title {
  font-weight: 600;
  margin-bottom: var(--bi-space-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.bi-callout-warning { background: var(--bi-warning-light); border-left-color: var(--bi-warning); }
.bi-callout-danger { background: var(--bi-danger-light); border-left-color: var(--bi-danger); }
.bi-callout-tip { background: var(--bi-success-light); border-left-color: var(--bi-success); }

.bi-editorial-flag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.75rem;
  background: var(--bi-warning-light);
  color: #92400e;
  border-radius: var(--bi-radius-md);
  font-size: var(--bi-text-xs);
  font-weight: 600;
  border: 1px solid rgba(232,163,23,0.3);
}

/* ============================================
   13. FORMS
   ============================================ */
.bi-form-group { margin-bottom: var(--bi-space-lg); }
.bi-form-label {
  display: block;
  font-weight: 500;
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-700);
  margin-bottom: var(--bi-space-sm);
}
.bi-form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--bi-neutral-300);
  border-radius: var(--bi-radius-md);
  font-size: var(--bi-text-base);
  transition: all var(--bi-transition-fast);
  background: #fff;
  color: var(--bi-neutral-900);
}
.bi-form-control:focus {
  outline: none;
  border-color: var(--bi-cyan);
  box-shadow: 0 0 0 3px rgba(0,180,216,0.15);
}
.bi-form-control::placeholder { color: var(--bi-neutral-400); }
.bi-form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}
textarea.bi-form-control { min-height: 120px; resize: vertical; }
.bi-form-error {
  font-size: var(--bi-text-sm);
  color: var(--bi-danger);
  margin-top: var(--bi-space-xs);
}
.bi-form-help {
  font-size: var(--bi-text-xs);
  color: var(--bi-neutral-500);
  margin-top: var(--bi-space-xs);
}
.bi-form-control.is-invalid {
  border-color: var(--bi-danger);
}
.bi-form-inline {
  display: flex;
  gap: var(--bi-space-sm);
  align-items: flex-start;
}
.bi-form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}
.bi-form-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--bi-cyan);
}

/* ============================================
   14. SEARCH
   ============================================ */
.bi-search-bar {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}
.bi-search-bar input {
  width: 100%;
  padding: 1rem 1.5rem 1rem 3rem;
  border: 2px solid var(--bi-neutral-200);
  border-radius: var(--bi-radius-full);
  font-size: var(--bi-text-lg);
  background: #fff;
  box-shadow: var(--bi-shadow-md);
  transition: all var(--bi-transition-base);
}
.bi-search-bar input:focus {
  outline: none;
  border-color: var(--bi-cyan);
  box-shadow: var(--bi-shadow-glow);
}
.bi-search-bar .search-icon {
  position: absolute;
  left: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--bi-neutral-400);
  font-size: 1.1rem;
}
.bi-search-results { margin-top: var(--bi-space-xl); }
.bi-search-result {
  padding: var(--bi-space-lg);
  border-bottom: 1px solid var(--bi-neutral-100);
  transition: background var(--bi-transition-fast);
}
.bi-search-result:hover { background: var(--bi-neutral-50); }
.bi-search-result h3 { font-size: var(--bi-text-lg); margin-bottom: var(--bi-space-xs); }
.bi-search-result h3 a { color: var(--bi-charcoal); }
.bi-search-result h3 a:hover { color: var(--bi-cyan); }
.bi-search-result p { font-size: var(--bi-text-sm); color: var(--bi-neutral-600); }
.bi-search-result .result-meta { font-size: var(--bi-text-xs); color: var(--bi-neutral-500); margin-top: var(--bi-space-sm); }
mark, .bi-search-highlight { background: rgba(0,180,216,0.15); color: inherit; padding: 0 2px; border-radius: 2px; }
.bi-search-empty {
  text-align: center;
  padding: var(--bi-space-4xl) 0;
  color: var(--bi-neutral-500);
}
.bi-search-empty i { font-size: 3rem; margin-bottom: var(--bi-space-md); display: block; color: var(--bi-neutral-300); }
.bi-search-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--bi-space-sm);
  margin: var(--bi-space-lg) 0;
}

/* Search Modal Overlay */
.bi-search-modal {
  display: none; position: fixed; inset: 0; z-index: 9999;
  align-items: flex-start; justify-content: center; padding-top: 12vh;
}
.bi-search-modal.is-open { display: flex; }
.bi-search-modal-backdrop {
  position: absolute; inset: 0; background: rgba(0,0,0,0.55); backdrop-filter: blur(4px);
}
.bi-search-modal-container {
  position: relative; width: 100%; max-width: 620px; max-height: 70vh;
  background: white; border-radius: var(--bi-radius-lg); box-shadow: 0 25px 60px rgba(0,0,0,0.3);
  display: flex; flex-direction: column; margin: 0 1rem; overflow: hidden;
}
.bi-search-modal-header {
  display: flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--bi-neutral-200);
}
.bi-search-modal-input-wrap {
  flex: 1; display: flex; align-items: center; gap: 0.6rem;
}
.bi-search-modal-input {
  flex: 1; border: none; outline: none; font-size: 1rem; padding: 0.4rem 0;
  background: transparent; color: var(--bi-charcoal); font-family: inherit;
}
.bi-search-modal-input::placeholder { color: var(--bi-neutral-400); }
.bi-search-modal-close {
  background: none; border: none; font-size: 1.5rem; color: var(--bi-neutral-400);
  cursor: pointer; padding: 0 0.25rem; line-height: 1;
}
.bi-search-modal-close:hover { color: var(--bi-charcoal); }
.bi-search-modal-results {
  flex: 1; overflow-y: auto; max-height: 50vh;
}
.bi-search-result-item:hover { background: var(--bi-neutral-50) !important; }
.bi-search-modal-footer {
  padding: 0.5rem 1rem; border-top: 1px solid var(--bi-neutral-100);
  text-align: right;
}
@keyframes bi-spin { from { transform: rotate(0); } to { transform: rotate(360deg); } }
.bi-spin { animation: bi-spin 0.8s linear infinite; display: inline-block; }

/* ============================================
   15. GLOSSARY
   ============================================ */
.bi-glossary-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: var(--bi-space-md) 0;
  position: sticky;
  top: 72px;
  background: var(--bi-offwhite);
  z-index: var(--bi-z-sticky);
  border-bottom: 1px solid var(--bi-neutral-200);
}
.bi-glossary-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--bi-radius-md);
  font-weight: 600;
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-600);
  transition: all var(--bi-transition-fast);
}
.bi-glossary-nav a:hover,
.bi-glossary-nav a.active {
  background: var(--bi-cyan);
  color: var(--bi-charcoal);
}
.bi-glossary-nav a.disabled {
  color: var(--bi-neutral-300);
  pointer-events: none;
}
.bi-glossary-letter {
  padding-top: var(--bi-space-2xl);
  margin-bottom: var(--bi-space-lg);
}
.bi-glossary-letter h2 {
  font-size: var(--bi-text-3xl);
  color: var(--bi-cyan);
  border-bottom: 2px solid var(--bi-neutral-200);
  padding-bottom: var(--bi-space-sm);
}
.bi-glossary-term {
  padding: var(--bi-space-lg);
  background: #fff;
  border-radius: var(--bi-radius-lg);
  margin-bottom: var(--bi-space-md);
  box-shadow: var(--bi-shadow-sm);
  transition: box-shadow var(--bi-transition-base);
}
.bi-glossary-term:hover { box-shadow: var(--bi-shadow-md); }
.bi-glossary-term h3 { font-size: var(--bi-text-lg); font-family: var(--bi-font-sans); color: var(--bi-charcoal); }
.bi-glossary-term .term-definition { color: var(--bi-neutral-700); margin: var(--bi-space-sm) 0; }
.bi-glossary-term .term-context { font-size: var(--bi-text-sm); color: var(--bi-neutral-500); }

/* Inline tooltip */
.bi-tooltip-term {
  border-bottom: 1px dotted var(--bi-neutral-400);
  cursor: help;
  position: relative;
}
.bi-tooltip-term:hover .bi-tooltip-content,
.bi-tooltip-term:focus .bi-tooltip-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.bi-tooltip-content {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(5px);
  min-width: 250px;
  max-width: 350px;
  padding: var(--bi-space-md);
  background: var(--bi-charcoal);
  color: #fff;
  border-radius: var(--bi-radius-md);
  font-size: var(--bi-text-sm);
  line-height: var(--bi-leading-normal);
  box-shadow: var(--bi-shadow-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--bi-transition-fast);
  z-index: var(--bi-z-tooltip);
  pointer-events: none;
}
.bi-tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--bi-charcoal);
}

/* ============================================
   16. COMPARISON TABLE
   ============================================ */
.bi-comparison-wrapper {
  overflow-x: auto;
  border-radius: var(--bi-radius-lg);
  box-shadow: var(--bi-shadow-lg);
}
.bi-comparison-table {
  min-width: 800px;
  background: #fff;
}
.bi-comparison-table th {
  background: var(--bi-charcoal);
  color: #fff;
  padding: 1rem;
  font-size: var(--bi-text-sm);
  font-weight: 600;
  text-align: left;
  position: sticky;
  top: 72px;
  z-index: 10;
}
.bi-comparison-table th:first-child {
  position: sticky;
  left: 0;
  z-index: 11;
}
.bi-comparison-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--bi-neutral-100);
  font-size: var(--bi-text-sm);
  vertical-align: top;
}
.bi-comparison-table td:first-child {
  font-weight: 600;
  background: var(--bi-neutral-50);
  position: sticky;
  left: 0;
  z-index: 5;
}
.bi-comparison-table tr:nth-child(even) td { background: var(--bi-neutral-50); }
.bi-comparison-table tr:nth-child(even) td:first-child { background: var(--bi-neutral-100); }
.bi-comparison-table tr:hover td { background: rgba(0,180,216,0.03); }

/* Rating indicators in table */
.rating-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: var(--bi-text-xs);
  font-weight: 500;
}
.rating-indicator .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.rating-none .dot { background: var(--bi-neutral-300); }
.rating-low .dot { background: var(--bi-risk-medium); }
.rating-medium .dot { background: var(--bi-cyan); }
.rating-high .dot { background: var(--bi-success); }
.rating-full .dot { background: var(--bi-success); box-shadow: 0 0 4px var(--bi-success); }

/* ============================================
   17. FOOTER
   ============================================ */
.bi-footer {
  background: var(--bi-neutral-900);
  color: var(--bi-neutral-300);
  padding: var(--bi-space-4xl) 0 var(--bi-space-xl);
}
.bi-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--bi-space-xl) var(--bi-space-2xl);
}
.bi-footer-brand-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--bi-space-2xl);
  padding-bottom: var(--bi-space-xl);
  margin-bottom: var(--bi-space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.bi-footer-brand-row .bi-footer-description {
  max-width: 420px;
  margin: 0;
}
@media (max-width: 991px) {
  .bi-footer-grid { grid-template-columns: repeat(2, 1fr); }
  .bi-footer-brand-row { flex-direction: column; }
}
@media (max-width: 575px) {
  .bi-footer-grid { grid-template-columns: 1fr; }
}
/* Footer brand */
.bi-footer-brand {
  text-decoration: none;
  display: block;
  margin-bottom: var(--bi-space-md);
}
.bi-footer-brand .footer-logo,
.bi-footer-logo {
  font-family: var(--bi-font-sans);
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: var(--bi-space-sm);
}
.bi-footer-brand .footer-logo span,
.bi-footer-logo span { color: var(--bi-cyan); }
.bi-footer-brand p,
.bi-footer-description {
  font-size: var(--bi-text-sm);
  line-height: var(--bi-leading-relaxed);
  color: var(--bi-neutral-400);
}
/* Footer headings — target h3, h5 and the specific class */
.bi-footer h5,
.bi-footer h3,
.bi-footer-heading,
.bi-footer-col h3,
.bi-footer-col .bi-footer-heading {
  color: #ffffff !important;
  opacity: 1 !important;
  font-family: var(--bi-font-sans);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--bi-space-lg);
}
.bi-footer-col { min-width: 0; }
.bi-footer-links { list-style: none; }
.bi-footer-links li { margin-bottom: 0.6rem; }
.bi-footer-links a {
  color: var(--bi-neutral-400);
  font-size: var(--bi-text-sm);
  transition: color var(--bi-transition-fast);
}
.bi-footer-links a:hover { color: var(--bi-cyan); }
.bi-footer-bottom {
  border-top: 1px solid var(--bi-neutral-800);
  margin-top: var(--bi-space-2xl);
  padding-top: var(--bi-space-lg);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--bi-space-md);
  font-size: var(--bi-text-xs);
  color: var(--bi-neutral-500);
}
.bi-footer-disclaimer {
  font-size: var(--bi-text-xs);
  color: var(--bi-neutral-500);
  max-width: 800px;
  margin-top: var(--bi-space-xl);
  line-height: var(--bi-leading-relaxed);
  border-top: 1px solid var(--bi-neutral-800);
  padding-top: var(--bi-space-lg);
}

/* ============================================
   18. NEWSLETTER SECTION
   ============================================ */
/* Newsletter — both class names for compatibility */
.bi-newsletter,
.bi-newsletter-section {
  background: linear-gradient(135deg, var(--bi-midnight) 0%, #141b2d 50%, var(--bi-charcoal) 100%);
  padding: var(--bi-space-3xl) 0;
  position: relative;
  overflow: hidden;
}
.bi-newsletter::before,
.bi-newsletter-section::before {
  content: '';
  position: absolute;
  top: -30%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,180,216,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.bi-newsletter-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--bi-space-2xl);
  position: relative;
}
.bi-newsletter-text {
  flex: 0 0 auto;
  max-width: 380px;
}
.bi-newsletter h2, .bi-newsletter-heading {
  font-family: var(--bi-font-sans);
  color: #fff;
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  line-height: 1.3;
}
.bi-newsletter p, .bi-newsletter-subtitle {
  color: var(--bi-neutral-400);
  margin-bottom: 0;
  font-size: var(--bi-text-sm);
  line-height: 1.5;
}
.bi-newsletter-form {
  flex: 1;
  max-width: 520px;
  position: relative;
}
.bi-newsletter-fields {
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  gap: 0.5rem;
  align-items: stretch;
}
.bi-newsletter-fields input,
.bi-newsletter-fields .form-control {
  flex: 1 1 0 !important;
  min-width: 0 !important;
  width: 0 !important;
  max-width: none !important;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--bi-radius-md);
  background: rgba(255,255,255,0.07);
  color: #fff;
  font-size: var(--bi-text-sm);
  font-family: var(--bi-font-sans);
}
.bi-newsletter-fields .btn,
.bi-newsletter-fields .bi-btn-subscribe {
  flex: 0 0 auto !important;
}
.bi-newsletter-fields input::placeholder { color: rgba(255,255,255,0.4); }
.bi-newsletter-fields input:focus {
  outline: none;
  border-color: var(--bi-cyan);
  background: rgba(255,255,255,0.1);
  box-shadow: 0 0 0 3px rgba(0,180,216,0.15);
}
.bi-btn-subscribe {
  padding: 0.75rem 1.75rem;
  background: var(--bi-cyan);
  color: #0f1629;
  font-weight: 700;
  font-size: var(--bi-text-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: none;
  border-radius: var(--bi-radius-md);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.bi-btn-subscribe:hover {
  background: var(--bi-cyan-light);
  box-shadow: 0 0 20px rgba(0,180,216,0.3);
}
.bi-newsletter-privacy {
  font-size: 0.7rem;
  color: var(--bi-neutral-500);
  margin-top: 0.5rem;
  text-align: right;
}
@media (max-width: 991px) {
  .bi-newsletter-inner { flex-direction: column; text-align: center; }
  .bi-newsletter-text { max-width: 100%; }
  .bi-newsletter-form { max-width: 100%; width: 100%; }
  .bi-newsletter-privacy { text-align: center; }
}
@media (max-width: 575px) {
  .bi-newsletter-fields { flex-direction: column; }
}

/* ============================================
   19. TOOL PREVIEW
   ============================================ */
.bi-tool-preview {
  position: relative;
  overflow: hidden;
}
.bi-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(0,180,216,0.1);
  border: 1px solid rgba(0,180,216,0.2);
  border-radius: var(--bi-radius-full);
  color: var(--bi-cyan);
  font-size: var(--bi-text-sm);
  font-weight: 600;
}
.bi-status-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--bi-cyan);
  animation: pulse 2s ease-in-out infinite;
}
.bi-tool-feature-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--bi-radius-lg);
  padding: var(--bi-space-lg);
  transition: all var(--bi-transition-base);
}
.bi-tool-feature-card:hover {
  border-color: rgba(0,180,216,0.2);
  box-shadow: var(--bi-shadow-glow);
  background: rgba(255,255,255,0.05);
}
.bi-tool-feature-card .feature-icon {
  font-size: 1.5rem;
  margin-bottom: var(--bi-space-md);
  color: var(--bi-cyan);
}
.bi-tool-feature-card h4 { color: #fff; font-size: var(--bi-text-lg); margin-bottom: var(--bi-space-sm); }
.bi-tool-feature-card p { color: var(--bi-neutral-400); font-size: var(--bi-text-sm); }

/* ============================================
   20. BREADCRUMBS
   ============================================ */
.bi-breadcrumbs,
.bi-breadcrumb {
  padding: var(--bi-space-md) 0;
}
.bi-breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-500);
  list-style: none;
}
.bi-breadcrumb-list li + li::before {
  content: '/';
  margin-right: 0.5rem;
  color: var(--bi-neutral-400);
}
.bi-breadcrumb-list a { color: var(--bi-cyan-dark); text-decoration: underline; text-decoration-color: var(--bi-neutral-400); text-underline-offset: 2px; }
.bi-breadcrumb-list a:hover { color: var(--bi-cyan); text-decoration-color: var(--bi-cyan); }
.bi-breadcrumb-list .current { font-weight: 500; color: var(--bi-neutral-800); }

/* ============================================
   21. ACCORDION
   ============================================ */
.bi-accordion-item {
  border: 1px solid var(--bi-neutral-200);
  border-radius: var(--bi-radius-lg);
  margin-bottom: var(--bi-space-sm);
  overflow: hidden;
  background: #fff;
}
.bi-accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--bi-space-md) var(--bi-space-lg);
  cursor: pointer;
  font-weight: 600;
  color: var(--bi-charcoal);
  transition: background var(--bi-transition-fast);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: var(--bi-text-base);
  font-family: var(--bi-font-sans);
}
.bi-accordion-header:hover { background: var(--bi-neutral-50); }
.bi-accordion-header .accordion-icon {
  transition: transform var(--bi-transition-base);
  font-size: 0.8rem;
  color: var(--bi-neutral-400);
}
.bi-accordion-item.is-open .accordion-icon { transform: rotate(180deg); }
.bi-accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--bi-transition-slow);
}
.bi-accordion-item.is-open .bi-accordion-body { max-height: 1000px; }
.bi-accordion-body-inner {
  padding: 0 var(--bi-space-lg) var(--bi-space-lg);
  color: var(--bi-neutral-600);
  line-height: var(--bi-leading-relaxed);
}

/* ============================================
   22. MODAL
   ============================================ */
.bi-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: var(--bi-z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--bi-transition-base);
}
.bi-modal-backdrop.active { opacity: 1; visibility: visible; }
.bi-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: #fff;
  border-radius: var(--bi-radius-xl);
  box-shadow: var(--bi-shadow-xl);
  max-width: 600px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
  z-index: var(--bi-z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--bi-transition-base);
}
.bi-modal.active { opacity: 1; visibility: visible; transform: translate(-50%, -50%) scale(1); }
.bi-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--bi-space-lg);
  border-bottom: 1px solid var(--bi-neutral-100);
}
.bi-modal-body { padding: var(--bi-space-lg); }
.bi-modal-footer {
  padding: var(--bi-space-md) var(--bi-space-lg);
  border-top: 1px solid var(--bi-neutral-100);
  display: flex;
  justify-content: flex-end;
  gap: var(--bi-space-sm);
}
.bi-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--bi-neutral-400);
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
}
.bi-modal-close:hover { color: var(--bi-neutral-800); }

/* ============================================
   23. LOADING & SKELETON
   ============================================ */
.bi-skeleton {
  background: linear-gradient(90deg, var(--bi-neutral-100) 25%, var(--bi-neutral-200) 50%, var(--bi-neutral-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--bi-radius-md);
}
.bi-skeleton-text { height: 1rem; margin-bottom: 0.5rem; }
.bi-skeleton-text:last-child { width: 60%; }
.bi-skeleton-heading { height: 2rem; width: 70%; margin-bottom: 1rem; }
.bi-skeleton-card { height: 200px; }
.bi-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--bi-space-3xl);
}
.bi-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--bi-neutral-200);
  border-top-color: var(--bi-cyan);
  border-radius: 50%;
  animation: rotate 0.8s linear infinite;
}

/* ============================================
   24. ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes shimmer {
  from { background-position: -200% 0; }
  to { background-position: 200% 0; }
}
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(var(--rotate, 0deg)); }
  50% { transform: translateY(-15px) rotate(var(--rotate, 0deg)); }
}
@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes borderGlow {
  0%, 100% { border-color: var(--bi-cyan); box-shadow: 0 0 10px rgba(0,180,216,0.2); }
  50% { border-color: var(--bi-primary-700); box-shadow: 0 0 20px rgba(0,180,216,0.4); }
}

.animate-fade-in-up { animation: fadeInUp 0.6s ease both; }
.animate-fade-in { animation: fadeIn 0.6s ease both; }
.animate-slide-right { animation: slideInRight 0.6s ease both; }

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}
.animate-delay-1 { transition-delay: 0.1s; animation-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; animation-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; animation-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; animation-delay: 0.4s; }
.animate-delay-5 { transition-delay: 0.5s; animation-delay: 0.5s; }

/* ============================================
   25. UTILITY CLASSES
   ============================================ */
.sr-only, .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.line-clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.aspect-16-9 { aspect-ratio: 16/9; }
.aspect-4-3 { aspect-ratio: 4/3; }
.aspect-1-1 { aspect-ratio: 1/1; }

.rounded-sm { border-radius: var(--bi-radius-sm); }
.rounded-md { border-radius: var(--bi-radius-md); }
.rounded-lg { border-radius: var(--bi-radius-lg); }
.rounded-xl { border-radius: var(--bi-radius-xl); }
.rounded-full { border-radius: var(--bi-radius-full); }

.shadow-sm { box-shadow: var(--bi-shadow-sm); }
.shadow-md { box-shadow: var(--bi-shadow-md); }
.shadow-lg { box-shadow: var(--bi-shadow-lg); }
.shadow-xl { box-shadow: var(--bi-shadow-xl); }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }
.mx-auto { margin-left: auto; margin-right: auto; }

.bg-dark { background-color: var(--bi-charcoal); }
.bg-light { background-color: var(--bi-offwhite); }
.bg-white { background-color: #fff; }
.bg-accent { background-color: var(--bi-cyan); }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-inline-flex { display: inline-flex; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--bi-space-sm); }
.mt-md { margin-top: var(--bi-space-md); }
.mt-lg { margin-top: var(--bi-space-lg); }
.mt-xl { margin-top: var(--bi-space-xl); }
.mt-2xl { margin-top: var(--bi-space-2xl); }
.mt-3xl { margin-top: var(--bi-space-3xl); }
.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--bi-space-sm); }
.mb-md { margin-bottom: var(--bi-space-md); }
.mb-lg { margin-bottom: var(--bi-space-lg); }
.mb-xl { margin-bottom: var(--bi-space-xl); }
.mb-2xl { margin-bottom: var(--bi-space-2xl); }
.mb-3xl { margin-bottom: var(--bi-space-3xl); }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }
.p-md { padding: var(--bi-space-md); }
.p-lg { padding: var(--bi-space-lg); }
.p-xl { padding: var(--bi-space-xl); }
.p-2xl { padding: var(--bi-space-2xl); }

/* Responsive display */
@media (max-width: 575px) {
  .d-sm-none { display: none; }
  .d-sm-block { display: block; }
}
@media (min-width: 576px) and (max-width: 767px) {
  .d-md-none { display: none; }
}
@media (max-width: 991px) {
  .d-lg-none { display: none; }
  .d-lg-block { display: block; }
}
@media (min-width: 992px) {
  .d-lg-only-none { display: none; }
  .d-lg-flex { display: flex; }
}

/* ============================================
   26. ADMIN STYLES
   ============================================ */
.bi-admin-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  min-height: 100vh;
}
.bi-admin-sidebar {
  background: var(--bi-charcoal);
  color: #fff;
  padding: var(--bi-space-lg) 0;
}
.bi-admin-sidebar .admin-logo {
  padding: 0 var(--bi-space-lg);
  margin-bottom: var(--bi-space-xl);
  font-weight: 700;
  font-size: var(--bi-text-lg);
  color: #fff;
}
.bi-admin-sidebar .admin-logo span { color: var(--bi-cyan); }
.bi-admin-nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem var(--bi-space-lg);
  color: var(--bi-neutral-400);
  font-size: var(--bi-text-sm);
  transition: all var(--bi-transition-fast);
}
.bi-admin-nav a:hover,
.bi-admin-nav a.active {
  background: rgba(255,255,255,0.06);
  color: var(--bi-cyan);
}
.bi-admin-content {
  background: var(--bi-neutral-50);
  padding: var(--bi-space-xl);
}
.bi-admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--bi-space-xl);
}
.bi-admin-card {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  box-shadow: var(--bi-shadow-sm);
  padding: var(--bi-space-lg);
  margin-bottom: var(--bi-space-lg);
}

/* Admin Table */
.bi-admin-table {
  width: 100%;
  border-collapse: collapse;
}
.bi-admin-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: var(--bi-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--bi-neutral-500);
  border-bottom: 2px solid var(--bi-neutral-200);
  background: var(--bi-neutral-50);
}
.bi-admin-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--bi-neutral-100);
  font-size: var(--bi-text-sm);
}
.bi-admin-table tr:hover td { background: var(--bi-neutral-50); }

/* ============================================
   27. RESPONSIVE
   ============================================ */
@media (max-width: 991px) {
  h1 { font-size: var(--bi-text-4xl); }
  h2 { font-size: var(--bi-text-3xl); }
  .bi-hero { min-height: 70vh; }
  .bi-hero-title { font-size: var(--bi-text-4xl); }
  .bi-hero-subtitle { font-size: var(--bi-text-lg); }
  .bi-hero-shapes { display: none; }
  .bi-article-hero h1 { font-size: var(--bi-text-4xl); }
  .bi-newsletter-inner { flex-direction: column; text-align: center; }
  .bi-admin-layout { grid-template-columns: 1fr; }
  .bi-admin-sidebar { display: none; }
}
@media (max-width: 575px) {
  h1 { font-size: var(--bi-text-3xl); }
  h2 { font-size: var(--bi-text-2xl); }
  .bi-hero { min-height: 60vh; }
  .bi-hero-title { font-size: var(--bi-text-3xl); }
  .bi-hero-cta { flex-direction: column; }
  .bi-hero-cta .btn { width: 100%; justify-content: center; }
  .bi-article-meta { flex-direction: column; gap: var(--bi-space-sm); }
  .container { padding-left: var(--bi-space-md); padding-right: var(--bi-space-md); }
  .bi-comparison-table th,
  .bi-comparison-table td { padding: 0.5rem 0.75rem; font-size: var(--bi-text-xs); }
}

/* ============================================
   28. PRINT STYLES
   ============================================ */
@media print {
  .bi-navbar, .bi-footer, .bi-newsletter,
  .bi-search-bar, .bi-mobile-overlay,
  .btn, .bi-hero-shapes, .skip-link,
  .bi-article-sidebar, .bi-breadcrumbs, .bi-breadcrumb {
    display: none !important;
  }
  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
    padding-top: 0;
  }
  a { text-decoration: underline; color: #000; }
  .bi-hero, .bi-page-hero, .bi-article-hero {
    background: #fff !important;
    color: #000 !important;
    min-height: auto;
    padding: 1rem 0;
    margin-top: 0;
  }
  .bi-hero-title, .bi-page-hero h1, .bi-article-hero h1 { color: #000 !important; text-shadow: none; }
  .bi-hero-subtitle, .bi-page-hero p { color: #333 !important; }
  .bi-card { box-shadow: none; border: 1px solid #ddd; break-inside: avoid; }
  .prose { max-width: 100%; }
}

/* ============================================
   29. ARTICLE CONTENT ENHANCEMENTS
   ============================================ */
.prose table {
  border: 1px solid var(--bi-neutral-200);
  border-radius: var(--bi-radius-md);
  overflow: hidden;
}
.prose .table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--bi-space-xl) 0;
  border-radius: var(--bi-radius-md);
  box-shadow: var(--bi-shadow-sm);
}
.prose table.table-bordered th {
  background: var(--bi-charcoal);
  color: #fff;
  font-size: var(--bi-text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border-color: var(--bi-neutral-700);
}
.prose table.table-bordered td {
  vertical-align: top;
  font-size: var(--bi-text-sm);
  line-height: var(--bi-leading-normal);
}
.prose table.table-sm th { padding: 0.5rem 0.75rem; }
.prose table.table-sm td { padding: 0.5rem 0.75rem; }
.prose table tr:last-child td { border-bottom: none; }
.prose table .table-danger { background: #fef2f2; }
.prose table .table-warning { background: #fffbeb; }
.prose table .table-success { background: #f0fdf4; }
.prose table .table-info { background: #ecfeff; }
.prose strong { color: var(--bi-charcoal); }
.prose h2 {
  padding-top: var(--bi-space-md);
  border-top: 1px solid var(--bi-neutral-200);
}
.prose h2:first-child { border-top: none; padding-top: 0; }
.prose h3 { color: var(--bi-neutral-800); }

.bi-article-content-box {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  padding: var(--bi-space-2xl) var(--bi-space-2xl);
  box-shadow: var(--bi-shadow-md);
  margin-bottom: var(--bi-space-xl);
}
@media (max-width: 575px) {
  .bi-article-content-box { padding: var(--bi-space-lg) var(--bi-space-md); }
}

.bi-key-takeaways {
  background: linear-gradient(135deg, #ecfeff 0%, #f0fdf4 100%);
  border: 1px solid var(--bi-primary-200);
  border-left: 4px solid var(--bi-cyan);
  border-radius: var(--bi-radius-md);
  padding: var(--bi-space-lg);
  margin: var(--bi-space-xl) 0;
}
.bi-key-takeaways h3 {
  font-size: var(--bi-text-base);
  font-family: var(--bi-font-sans);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--bi-primary-700);
  margin-bottom: var(--bi-space-md);
}
.bi-key-takeaways ul { list-style: none; padding-left: 0; margin-bottom: 0; }
.bi-key-takeaways li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: var(--bi-space-sm);
  font-size: var(--bi-text-sm);
  line-height: var(--bi-leading-normal);
  color: var(--bi-neutral-700);
}
.bi-key-takeaways li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--bi-success);
  font-weight: 700;
}

.bi-why-matters {
  background: var(--bi-neutral-50);
  border-radius: var(--bi-radius-md);
  padding: var(--bi-space-lg);
  margin: var(--bi-space-xl) 0;
  border-left: 4px solid var(--bi-amber);
}

.bi-what-wrong {
  background: #fef2f2;
  border-radius: var(--bi-radius-md);
  padding: var(--bi-space-lg);
  margin: var(--bi-space-xl) 0;
  border-left: 4px solid var(--bi-danger);
}

.bi-article-section-title {
  font-family: var(--bi-font-sans);
  font-size: var(--bi-text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bi-neutral-500);
  margin-bottom: var(--bi-space-sm);
}

.bi-hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--bi-space-xl);
}
@media (max-width: 575px) {
  .bi-hub-grid { grid-template-columns: 1fr; }
}

.bi-article-card {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  box-shadow: var(--bi-shadow-sm);
  padding: var(--bi-space-lg);
  transition: all var(--bi-transition-base);
  border-left: 3px solid transparent;
  display: flex;
  flex-direction: column;
}
.bi-article-card:hover {
  box-shadow: var(--bi-shadow-lg);
  border-left-color: var(--bi-cyan);
  transform: translateY(-2px);
}
.bi-article-card h3 {
  font-size: var(--bi-text-lg);
  font-family: var(--bi-font-sans);
  margin-bottom: var(--bi-space-sm);
}
.bi-article-card h3 a {
  color: var(--bi-charcoal);
  text-decoration: none;
}
.bi-article-card h3 a:hover { color: var(--bi-cyan); }
.bi-article-card p {
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-600);
  line-height: var(--bi-leading-normal);
  flex-grow: 1;
}
.bi-article-card .card-meta {
  font-size: var(--bi-text-xs);
  color: var(--bi-neutral-500);
  margin-top: var(--bi-space-md);
  padding-top: var(--bi-space-sm);
  border-top: 1px solid var(--bi-neutral-100);
  display: flex;
  gap: var(--bi-space-md);
}

.bi-cornerstone-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.5rem;
  background: linear-gradient(135deg, var(--bi-primary-100), var(--bi-primary-200));
  color: var(--bi-primary-800);
  border-radius: var(--bi-radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Back to top button */
.bi-back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bi-charcoal);
  color: #fff;
  border: none;
  border-radius: var(--bi-radius-full);
  box-shadow: var(--bi-shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--bi-transition-base);
  z-index: var(--bi-z-fixed);
}
.bi-back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.bi-back-to-top:hover {
  background: var(--bi-cyan);
  color: var(--bi-charcoal);
  transform: translateY(-3px);
}

/* Cookie consent */
.bi-cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bi-charcoal);
  color: var(--bi-neutral-300);
  padding: var(--bi-space-md) var(--bi-space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--bi-space-lg);
  font-size: var(--bi-text-sm);
  z-index: var(--bi-z-fixed);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
  transform: translateY(100%);
  transition: transform var(--bi-transition-base);
}
.bi-cookie-consent.visible { transform: translateY(0); }
.bi-cookie-consent a { color: var(--bi-cyan); }
@media (max-width: 575px) {
  .bi-cookie-consent { flex-direction: column; text-align: center; gap: var(--bi-space-sm); }
}

/* Stat counters on hub/home pages */
.bi-stat-strip {
  display: flex;
  justify-content: center;
  gap: var(--bi-space-3xl);
  padding: var(--bi-space-2xl) 0;
}
.bi-stat-item { text-align: center; }
.bi-stat-number {
  font-size: var(--bi-text-4xl);
  font-weight: 700;
  color: var(--bi-cyan);
  line-height: 1;
}
.bi-stat-label {
  font-size: var(--bi-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bi-neutral-500);
  margin-top: var(--bi-space-xs);
}
@media (max-width: 575px) {
  .bi-stat-strip { flex-wrap: wrap; gap: var(--bi-space-xl); }
  .bi-stat-number { font-size: var(--bi-text-2xl); }
}

/* Framework comparison page styles */
.bi-framework-card {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  padding: var(--bi-space-lg);
  box-shadow: var(--bi-shadow-sm);
  transition: all var(--bi-transition-base);
  border-top: 3px solid var(--bi-neutral-200);
}
.bi-framework-card:hover {
  box-shadow: var(--bi-shadow-lg);
  transform: translateY(-2px);
}
.bi-framework-card h3 { font-family: var(--bi-font-sans); font-size: var(--bi-text-lg); }
.bi-framework-card .fw-category {
  font-size: var(--bi-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bi-cyan);
  font-weight: 600;
}

/* Building type cards */
.bi-building-type-card {
  background: #fff;
  border-radius: var(--bi-radius-lg);
  overflow: hidden;
  box-shadow: var(--bi-shadow-md);
  transition: all var(--bi-transition-base);
}
.bi-building-type-card:hover {
  box-shadow: var(--bi-shadow-xl);
  transform: translateY(-4px);
}
.bi-building-type-card .card-icon {
  background: linear-gradient(135deg, var(--bi-midnight), var(--bi-charcoal));
  padding: var(--bi-space-xl);
  text-align: center;
  font-size: 2.5rem;
  color: var(--bi-cyan);
}
.bi-building-type-card .card-content { padding: var(--bi-space-lg); }
.bi-building-type-card h3 {
  font-family: var(--bi-font-sans);
  font-size: var(--bi-text-lg);
  margin-bottom: var(--bi-space-sm);
}
.bi-building-type-card p {
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-600);
}

/* ============================================
   VISUAL KNOWLEDGE COMPONENTS
   Reusable visual elements for structured content
   ============================================ */

/* --- Annotated Image --- */
.bi-annotated-image {
  position: relative;
  display: inline-block;
  max-width: 100%;
  margin: var(--bi-space-lg) 0;
  border-radius: var(--bi-radius-lg);
  overflow: hidden;
  box-shadow: var(--bi-shadow-md);
}
.bi-annotated-image img {
  display: block;
  width: 100%;
  height: auto;
}
.bi-annotated-image .bi-annotation {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bi-cyan);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  transition: transform 0.15s ease;
  z-index: 2;
}
.bi-annotated-image .bi-annotation:hover {
  transform: scale(1.2);
}
.bi-annotated-image .bi-annotation-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bi-charcoal);
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: var(--bi-radius-sm);
  font-size: 0.8rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
  z-index: 3;
}
.bi-annotated-image .bi-annotation:hover .bi-annotation-tooltip {
  opacity: 1;
}
.bi-annotation-legend {
  margin-top: var(--bi-space-md);
  padding: var(--bi-space-md) var(--bi-space-lg);
  background: var(--bi-neutral-50);
  border-radius: var(--bi-radius-md);
  border: 1px solid var(--bi-neutral-200);
}
.bi-annotation-legend ol {
  margin: 0;
  padding-left: 1.25rem;
}
.bi-annotation-legend li {
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-700);
  padding: 0.25rem 0;
}

/* --- Document Specimen --- */
.bi-document-specimen {
  position: relative;
  background: #fff;
  border: 2px dashed var(--bi-neutral-300);
  border-radius: var(--bi-radius-lg);
  padding: var(--bi-space-xl);
  margin: var(--bi-space-lg) 0;
  overflow: hidden;
}
.bi-document-specimen::before {
  content: 'ILLUSTRATIVE EXAMPLE';
  position: absolute;
  top: 12px;
  right: -28px;
  background: var(--bi-amber);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.25rem 2.5rem;
  transform: rotate(45deg);
  z-index: 1;
}
.bi-document-specimen-header {
  text-align: center;
  border-bottom: 2px solid var(--bi-neutral-200);
  padding-bottom: var(--bi-space-md);
  margin-bottom: var(--bi-space-md);
}
.bi-document-specimen-header h3 {
  font-size: var(--bi-text-lg);
  font-weight: 700;
  margin: 0 0 0.25rem;
  color: var(--bi-charcoal);
}
.bi-document-specimen-header .doc-issuer {
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-500);
}
.bi-document-specimen-field {
  display: flex;
  gap: var(--bi-space-sm);
  padding: 0.4rem 0;
  border-bottom: 1px dotted var(--bi-neutral-200);
  font-size: var(--bi-text-sm);
}
.bi-document-specimen-field .field-label {
  flex: 0 0 35%;
  font-weight: 600;
  color: var(--bi-neutral-600);
}
.bi-document-specimen-field .field-value {
  flex: 1;
  color: var(--bi-neutral-700);
}
.bi-document-specimen-footer {
  margin-top: var(--bi-space-md);
  padding-top: var(--bi-space-sm);
  font-size: 0.7rem;
  color: var(--bi-neutral-400);
  text-align: center;
  font-style: italic;
}

/* --- Process Map --- */
.bi-process-map {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin: var(--bi-space-lg) 0;
  overflow-x: auto;
  padding-bottom: var(--bi-space-sm);
}
.bi-process-step {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.bi-process-step-content {
  text-align: center;
  min-width: 140px;
  max-width: 180px;
}
.bi-process-step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bi-cyan);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--bi-space-sm);
}
.bi-process-step-title {
  font-size: var(--bi-text-sm);
  font-weight: 600;
  color: var(--bi-charcoal);
  margin-bottom: 0.15rem;
}
.bi-process-step-desc {
  font-size: 0.75rem;
  color: var(--bi-neutral-500);
  line-height: 1.3;
}
.bi-process-arrow {
  flex-shrink: 0;
  width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bi-neutral-300);
  font-size: 1.25rem;
  padding-top: 10px;
}

/* Vertical variant */
.bi-process-map-vertical {
  flex-direction: column;
  gap: 0;
}
.bi-process-map-vertical .bi-process-step {
  flex-direction: row;
  gap: var(--bi-space-md);
}
.bi-process-map-vertical .bi-process-step-content {
  text-align: left;
}
.bi-process-map-vertical .bi-process-arrow {
  width: auto;
  height: 24px;
  padding-top: 0;
  padding-left: 16px;
  transform: rotate(90deg);
}

@media (max-width: 767px) {
  .bi-process-map {
    flex-direction: column;
    align-items: stretch;
  }
  .bi-process-step-content {
    min-width: auto;
    max-width: none;
    text-align: left;
    display: flex;
    align-items: center;
    gap: var(--bi-space-md);
  }
  .bi-process-step-number {
    margin: 0;
    flex-shrink: 0;
  }
  .bi-process-arrow {
    width: auto;
    height: 20px;
    padding: 0 0 0 16px;
    transform: rotate(90deg);
  }
}

/* --- Comparison (Current vs Required) --- */
.bi-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: var(--bi-space-lg) 0;
  border-radius: var(--bi-radius-lg);
  overflow: hidden;
  border: 1px solid var(--bi-neutral-200);
}
.bi-comparison-column {
  padding: var(--bi-space-lg);
}
.bi-comparison-column.current {
  background: #fef2f2;
  border-right: 2px solid var(--bi-neutral-200);
}
.bi-comparison-column.required {
  background: #ecfdf5;
}
.bi-comparison-column h4 {
  font-size: var(--bi-text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin: 0 0 var(--bi-space-md);
}
.bi-comparison-column.current h4 { color: #b91c1c; }
.bi-comparison-column.required h4 { color: #047857; }
.bi-comparison-item {
  display: flex;
  align-items: baseline;
  gap: var(--bi-space-sm);
  padding: 0.35rem 0;
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-700);
}
.bi-comparison-item .bi-icon {
  flex-shrink: 0;
  font-size: 0.85rem;
}
.bi-comparison-column.current .bi-icon { color: #dc2626; }
.bi-comparison-column.required .bi-icon { color: #059669; }
@media (max-width: 767px) {
  .bi-comparison {
    grid-template-columns: 1fr;
  }
  .bi-comparison-column.current {
    border-right: none;
    border-bottom: 2px solid var(--bi-neutral-200);
  }
}

/* --- Standards Context Card --- */
.bi-standards-context {
  background: linear-gradient(135deg, #f0f9ff 0%, #ecfdf5 100%);
  border: 1px solid var(--bi-neutral-200);
  border-left: 4px solid var(--bi-cyan);
  border-radius: var(--bi-radius-md);
  padding: var(--bi-space-lg);
  margin: var(--bi-space-lg) 0;
}
.bi-standards-context h4 {
  font-size: var(--bi-text-base);
  font-weight: 700;
  color: var(--bi-charcoal);
  margin: 0 0 var(--bi-space-sm);
}
.bi-standards-context-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.bi-standards-context-list li {
  display: flex;
  align-items: center;
  gap: var(--bi-space-sm);
  padding: 0.4rem 0;
  font-size: var(--bi-text-sm);
  color: var(--bi-neutral-700);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}
.bi-standards-context-list li:last-child {
  border-bottom: none;
}
.bi-adoption-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.bi-adoption-badge.adopted {
  background: #d1fae5;
  color: #065f46;
}
.bi-adoption-badge.referenced {
  background: #e0f2fe;
  color: #075985;
}
.bi-adoption-badge.differs {
  background: #fef3c7;
  color: #92400e;
}
.bi-adoption-badge.silent {
  background: #f3f4f6;
  color: #6b7280;
}

/* ============================================
   USER MENU FIX
   ============================================ */
.bi-navbar .navbar-nav .dropdown-menu-end {
  right: 0 !important;
  left: auto !important;
  transform: none !important;
}

/* ============================================
   TIER GATING
   ============================================ */
.bi-tier-locked {
  position: relative;
  filter: blur(4px);
  user-select: none;
  pointer-events: none;
}
.bi-tier-locked::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(15,22,41,0.5);
  border-radius: var(--bi-radius-md,8px);
}
.bi-tier-upgrade-banner {
  background: linear-gradient(135deg, var(--bi-navy, #0f1629) 0%, #1a2744 100%);
  color: #fff;
  border-radius: var(--bi-radius-md,8px);
  padding: var(--bi-space-xl,2rem);
  text-align: center;
  margin: var(--bi-space-lg,1.5rem) 0;
}
.bi-tier-upgrade-banner h3 {
  color: var(--bi-cyan,#06b6d4);
  margin-bottom: var(--bi-space-sm,0.5rem);
}
.bi-tier-upgrade-banner .btn {
  margin-top: var(--bi-space-md,1rem);
}