/* ==========================================================================
   BookHaven — Production Legal & Compliance Design System
   Jurisdictions: India (DPDP Act 2023, IT Act 2000), United States (CCPA/CPRA, COPPA),
                  European Union & UK (GDPR, ePrivacy), Australia (Privacy Act 1988)
   Palette: Royal Blue (#2563EB), Deep Navy (#1D4ED8), Amber (#FF9800), Slate (#0F172A)
   Responsive: Mobile (<640px), Tablet (768px-1024px), Desktop (1280px+)
   Accessibility: WCAG 2.2 AA Compliant | Print Ready | Self-Contained
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Merriweather", "Georgia", "Cambria", serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* BookHaven Brand Color Palette */
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF6FF;
  --primary-border: #BFDBFE;
  --accent: #FF9800;
  --accent-light: #FFF8E1;
  --accent-border: #FFE082;
  --emerald: #10B981;
  --emerald-light: #ECFDF5;

  /* Surfaces & Backgrounds */
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-subtle: #F1F5F9;
  --bg-elevated: #E2E8F0;
  --border-color: #E2E8F0;
  --border-subtle: #CBD5E1;

  /* Typography */
  --text-main: #0F172A;
  --text-muted: #475569;
  --text-light: #64748B;
  --text-inverse: #FFFFFF;

  /* Badges */
  --badge-blue-bg: #EFF6FF;
  --badge-blue-text: #1D4ED8;
  --badge-blue-border: #DBEAFE;

  --badge-green-bg: #F0FDF4;
  --badge-green-text: #15803D;
  --badge-green-border: #DCFCE7;

  --badge-amber-bg: #FFFBEB;
  --badge-amber-text: #B45309;
  --badge-amber-border: #FDE68A;

  /* Shadows & Radius */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --container-max-width: 1080px;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.68;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-page);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

/* Site Header */
.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-xs);
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  font-size: 1.75rem;
  background: var(--primary-light);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--primary-border);
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  transition: all 0.2s;
}

.header-btn:hover {
  background: var(--bg-subtle);
  text-decoration: none;
}

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

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

/* Breadcrumb */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.breadcrumb-separator {
  color: var(--text-light);
}

/* Layout */
.main-wrapper {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 32px 20px 60px;
  width: 100%;
  flex: 1;
}

.legal-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 36px;
  align-items: start;
}

@media (max-width: 960px) {
  .legal-layout {
    grid-template-columns: 1fr;
  }
  .toc-sidebar {
    display: none;
  }
}

/* Sidebar TOC */
.toc-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: sticky;
  top: 96px;
  box-shadow: var(--shadow-xs);
}

.toc-sidebar h4 {
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-light);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: 8px;
}

.toc-list a {
  font-size: 0.88rem;
  color: var(--text-muted);
  display: block;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  transition: all 0.15s;
}

.toc-list a:hover {
  background: var(--primary-light);
  color: var(--primary);
  text-decoration: none;
}

/* Document Content */
.doc-article {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

@media (max-width: 640px) {
  .doc-article {
    padding: 24px 18px;
  }
}

.doc-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.doc-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 12px;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.meta-item strong {
  color: var(--text-muted);
}

/* Callout Box */
.callout {
  padding: 20px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.callout.primary {
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  color: var(--primary-hover);
}

.callout.amber {
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: #92400E;
}

.callout.green {
  background: var(--emerald-light);
  border: 1px solid #A7F3D0;
  color: #065F46;
}

.callout-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.callout-text h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.callout-text p {
  font-size: 0.92rem;
  line-height: 1.55;
  margin: 0;
}

/* Headings in Content */
.doc-article h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.doc-article h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 24px 0 12px;
}

.doc-article p {
  margin-bottom: 16px;
  font-size: 0.96rem;
  color: var(--text-muted);
}

.doc-article ul,
.doc-article ol {
  margin: 0 0 20px 24px;
  color: var(--text-muted);
}

.doc-article li {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

/* Compliance Tables */
.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.92rem;
}

.legal-table th,
.legal-table td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border-color);
}

.legal-table th {
  background: var(--bg-subtle);
  font-weight: 700;
  color: var(--text-main);
}

.legal-table tr:nth-child(even) td {
  background: #FCFDFE;
}

/* Hub Grid on Index Page */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 24px;
  margin: 36px 0;
}

.hub-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-xs);
}

.hub-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.hub-card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.hub-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.hub-card:hover .hub-card-title {
  color: var(--primary);
}

.hub-card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 18px;
  flex: 1;
}

.hub-card-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Footer */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 32px 20px;
  font-size: 0.88rem;
  color: var(--text-light);
  text-align: center;
  margin-top: auto;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-bottom: 16px;
}

.footer-links a {
  color: var(--text-muted);
}

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