/**
 * BALL X PIT Game Tool Website - Main Stylesheet
 * Mobile-First Responsive Design
 * Last Updated: 2025-10-25
 */

/* ===================================
   CSS VARIABLES (DESIGN TOKENS)
   =================================== */
:root {
  /* Color Palette - Dark Gaming Theme */
  --color-primary: #8b5cf6;        /* Purple */
  --color-primary-dark: #7c3aed;
  --color-primary-light: #a78bfa;
  
  --color-secondary: #3b82f6;      /* Blue */
  --color-secondary-dark: #2563eb;
  --color-secondary-light: #60a5fa;
  
  --color-accent: #fbbf24;         /* Yellow/Gold */
  --color-accent-dark: #f59e0b;
  
  --color-success: #10b981;        /* Green */
  --color-warning: #f59e0b;        /* Orange */
  --color-error: #ef4444;          /* Red */
  
  --color-bg-primary: #0f172a;     /* Dark navy */
  --color-bg-secondary: #1e293b;   /* Slightly lighter */
  --color-bg-tertiary: #334155;    /* Cards/boxes */
  
  --color-text-primary: #f1f5f9;   /* Off-white */
  --color-text-secondary: #cbd5e1; /* Gray */
  --color-text-muted: #94a3b8;     /* Lighter gray */
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
  
  --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 */
  
  /* Spacing */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  --radius-full: 9999px; /* Fully rounded */
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  
  /* Layout */
  --max-width-sm: 640px;
  --max-width-md: 768px;
  --max-width-lg: 1024px;
  --max-width-xl: 1280px;
  --max-width-2xl: 1536px;
  
  --header-height: 60px;
  --mobile-header-height: 56px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

strong, b {
  font-weight: 600;
  color: var(--color-text-primary);
}

em, i {
  font-style: italic;
}

/* ===================================
   LAYOUT CONTAINERS
   =================================== */
.container {
  width: 100%;
  max-width: var(--max-width-xl);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

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

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

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

.container-full {
  max-width: 100%;
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-bg-tertiary);
  box-shadow: var(--shadow-md);
  min-height: var(--mobile-header-height);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--mobile-header-height);
  padding: var(--space-3) 0;
  gap: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.site-logo img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.site-logo-text {
  display: none;
  font-weight: 700;
  color: var(--color-text-primary);
  white-space: nowrap;
}

.site-logo:hover {
  text-decoration: none;
  opacity: 0.9;
}

.site-logo:hover img {
  transform: scale(1.05);
  transition: transform var(--transition-fast);
}

.main-nav {
  display: contents;
}

.nav-menu {
  display: none; /* Mobile: hidden by default */
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-menu.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-bg-tertiary);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  gap: var(--space-2);
}

.nav-link {
  display: inline-block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-weight: 500;
  white-space: nowrap;
}

.nav-link:hover {
  background-color: rgba(139, 92, 246, 0.1);
  color: var(--color-primary-light);
  text-decoration: none;
}

.nav-link.active {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(59, 130, 246, 0.2));
  color: var(--color-primary-light);
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.mobile-menu-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--space-2);
}

/* ===================================
   FOOTER
   =================================== */
.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-bg-tertiary);
  padding: var(--space-8) 0 var(--space-4);
  margin-top: var(--space-16);
}

.footer-content {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  list-style: none;
  margin-bottom: var(--space-4);
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
}

/* ===================================
   CARDS
   =================================== */
.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-3);
}

.card-content {
  color: var(--color-text-secondary);
}

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

/* Spacing */
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-16 { margin-top: var(--space-16); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-16 { margin-bottom: var(--space-16); }

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

/* Display */
.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

/* Flex Utilities */
.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* ===================================
   RESPONSIVE - TABLET (768px+)
   =================================== */
@media (min-width: 768px) {
  .site-header {
    min-height: var(--header-height);
  }
  
  .header-content {
    min-height: var(--header-height);
    padding: var(--space-2) 0;
  }
  
  .site-logo img {
    height: 42px;
  }
  
  .site-logo-text {
    display: inline-block;
    font-size: var(--font-size-lg);
  }
  
  .mobile-menu-toggle {
    display: none;
  }
  
  .nav-menu {
    display: flex;
    flex-direction: row;
    gap: var(--space-2);
    position: static;
    background: none;
    border: none;
    padding: 0;
    box-shadow: none;
    flex-wrap: nowrap;
  }
  
  .nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
  }
  
  .nav-menu.active {
    flex-direction: row;
  }
  
  h1 {
    font-size: var(--font-size-5xl);
  }
  
  .container {
    padding: 0 var(--space-6);
  }
}

/* ===================================
   RESPONSIVE - DESKTOP (1024px+)
   =================================== */
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
  
  .site-logo img {
    height: 45px;
  }
  
  .site-logo-text {
    font-size: var(--font-size-xl);
  }
  
  .nav-menu {
    gap: var(--space-3);
  }
  
  .nav-link {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-base);
  }
}

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

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn var(--transition-base);
}

.slide-up {
  animation: slideUp var(--transition-base);
}

/* ===================================
   PRINT STYLES
   =================================== */
@media print {
  .site-header,
  .site-footer,
  .mobile-menu-toggle,
  .btn {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}

/* ===================================
   BACK TO TOP BUTTON
   =================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
  transition: all var(--transition-base);
  opacity: 0;
  visibility: hidden;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(139, 92, 246, 0.6);
}

.back-to-top:active {
  transform: translateY(-2px);
}

/* Mobile adjustment */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
    font-size: 1.25rem;
  }
}

/* ===================================
   SIDE NAVIGATION (COLLAPSIBLE)
   =================================== */
.side-nav {
  position: fixed;
  left: 0;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  width: 280px;
  background: var(--color-bg-secondary);
  border-right: 2px solid rgba(139, 92, 246, 0.2);
  padding: var(--space-6) 0;
  overflow-y: auto;
  transition: transform var(--transition-base);
  z-index: 998;
  transform: translateX(-100%);
}

.side-nav.active {
  transform: translateX(0);
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
}

.side-nav-toggle {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 2px 0 8px rgba(139, 92, 246, 0.4);
  transition: all var(--transition-base);
  z-index: 997;
}

.side-nav-toggle:hover {
  transform: translateY(-50%) translateX(4px);
  box-shadow: 4px 0 12px rgba(139, 92, 246, 0.6);
}

.side-nav.active ~ .side-nav-toggle {
  left: 280px;
}

.side-nav-header {
  padding: 0 var(--space-6) var(--space-4) var(--space-6);
  border-bottom: 1px solid rgba(139, 92, 246, 0.2);
  margin-bottom: var(--space-4);
}

.side-nav-header h3 {
  font-size: var(--font-size-lg);
  color: var(--color-primary-light);
  margin-bottom: var(--space-2);
}

.side-nav-header p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.side-nav-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.side-nav-item {
  margin-bottom: var(--space-1);
}

.side-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.side-nav-link:hover {
  background: rgba(139, 92, 246, 0.1);
  color: var(--color-text-primary);
  border-left-color: var(--color-primary);
}

.side-nav-link.active {
  background: rgba(139, 92, 246, 0.15);
  color: var(--color-primary-light);
  border-left-color: var(--color-primary);
  font-weight: 600;
}

.side-nav-icon {
  font-size: var(--font-size-xl);
  width: 24px;
  text-align: center;
}

/* Side nav overlay for mobile */
.side-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 996;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.side-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile side nav adjustments */
@media (max-width: 768px) {
  .side-nav {
    top: var(--mobile-header-height);
    height: calc(100vh - var(--mobile-header-height));
    width: 260px;
  }
  
  .side-nav.active ~ .side-nav-toggle {
    left: 260px;
  }
  
  .side-nav-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
}

/* Hide side nav on very small screens when closed */
@media (max-width: 480px) {
  .side-nav-toggle {
    left: 10px;
  }
}

/* ===================================
   BREADCRUMB NAVIGATION
   =================================== */
.breadcrumb {
  padding: var(--space-4) 0;
  background: linear-gradient(to bottom, rgba(30, 41, 59, 0.5), transparent);
  border-bottom: 1px solid rgba(139, 92, 246, 0.1);
  margin-bottom: var(--space-6);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--font-size-sm);
  align-items: center;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
}

.breadcrumb-list li::after {
  content: "›";
  margin-left: var(--space-2);
  color: var(--color-text-muted);
  font-weight: bold;
  opacity: 0.5;
}

.breadcrumb-list li:last-child::after {
  content: "";
}

.breadcrumb-list a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.breadcrumb-list a:hover {
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.1);
  text-decoration: none;
}

.breadcrumb-list .active {
  color: var(--color-text-primary);
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
}

/* Breadcrumb icon (home icon) */
.breadcrumb-home-icon {
  font-size: var(--font-size-base);
  margin-right: var(--space-1);
}

/* Mobile breadcrumb adjustments */
@media (max-width: 640px) {
  .breadcrumb {
    padding: var(--space-3) 0;
  }
  
  .breadcrumb-list {
    font-size: var(--font-size-xs);
    gap: var(--space-1);
  }
  
  .breadcrumb-list li::after {
    margin-left: var(--space-1);
  }
}

/* ===================================
   RELATED CONTENT SECTION
   =================================== */
.related-content {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.3), rgba(15, 23, 42, 0.5));
  padding: var(--space-12) 0;
  border-radius: var(--radius-lg);
  margin-top: var(--space-12);
  border: 1px solid rgba(139, 92, 246, 0.1);
}

.related-content .section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
  color: var(--color-text-primary);
  text-align: center;
}

.related-content .section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-8);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.related-card {
  display: block;
  padding: var(--space-6);
  text-decoration: none;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.related-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(139, 92, 246, 0.2);
  border-color: var(--color-primary);
  text-decoration: none;
}

.related-card h3 {
  color: var(--color-primary-light);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xl);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.related-card:hover h3 {
  color: var(--color-primary);
}

.related-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  margin-bottom: 0;
}

.related-icon {
  font-size: var(--font-size-2xl);
  opacity: 0.8;
}

/* Responsive grid for related content */
@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===================================
   PAGE TABLE OF CONTENTS
   =================================== */
.page-toc {
  position: sticky;
  top: calc(var(--header-height) + 20px);
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-md);
}

.page-toc h3 {
  margin-top: 0;
  margin-bottom: var(--space-4);
  color: var(--color-primary-light);
  font-size: var(--font-size-xl);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-toc li {
  margin-bottom: var(--space-3);
}

.page-toc a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  width: 100%;
}

.page-toc a::before {
  content: '▸';
  color: var(--color-primary);
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition-fast);
}

.page-toc a:hover {
  color: var(--color-primary-light);
  background: rgba(139, 92, 246, 0.1);
  text-decoration: none;
  padding-left: var(--space-3);
}

.page-toc a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.page-toc a.active {
  color: var(--color-primary);
  font-weight: 600;
  background: rgba(139, 92, 246, 0.15);
}

/* Mobile TOC adjustments */
@media (max-width: 1024px) {
  .page-toc {
    position: relative;
    top: auto;
  }
}

/* ===================================
   IN-CONTENT CONTEXTUAL LINKS
   =================================== */
.content-body a:not(.btn):not(.related-card):not(.breadcrumb-list a) {
  color: var(--color-primary-light);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-color: rgba(139, 92, 246, 0.4);
  text-underline-offset: 3px;
  transition: all var(--transition-fast);
  padding: 0 2px;
  border-radius: 2px;
}

.content-body a:not(.btn):not(.related-card):not(.breadcrumb-list a):hover {
  color: var(--color-primary);
  text-decoration-style: solid;
  text-decoration-color: var(--color-primary);
  background: rgba(139, 92, 246, 0.1);
}

/* ===================================
   NEXT/PREVIOUS PAGE NAVIGATION
   =================================== */
.page-navigation {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 2px solid rgba(139, 92, 246, 0.2);
}

.page-nav-link {
  flex: 1;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.page-nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

.page-nav-link:hover::before {
  transform: scaleY(1);
}

.page-nav-link:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  text-decoration: none;
}

.page-nav-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.page-nav-title {
  font-size: var(--font-size-lg);
  color: var(--color-primary-light);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.page-nav-link:hover .page-nav-title {
  color: var(--color-primary);
}

.page-nav-link.prev {
  align-items: flex-start;
}

.page-nav-link.next {
  align-items: flex-end;
  text-align: right;
}

/* Mobile page navigation */
@media (max-width: 640px) {
  .page-navigation {
    flex-direction: column;
  }
  
  .page-nav-link {
    max-width: 100%;
  }
  
  .page-nav-link.next {
    align-items: flex-start;
    text-align: left;
  }
}