/**
 * TrafficVision Blog - Base Styles
 * Shared styles for all blog templates
 */

/* ============================================
   CSS VARIABLES
   ============================================ */

:root {
  /* Colors */
  --color-bg-primary: #0c0c10;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #18181f;
  --color-bg-hover: #1e1e28;

  --color-text-primary: #e4e4e9;
  --color-text-secondary: #a0a0ae;
  --color-text-muted: #6c6c7a;

  --color-accent: #10b981;
  --color-accent-hover: #059669;
  --color-accent-subtle: rgba(16, 185, 129, 0.12);

  --color-border: #2a2a38;
  --color-border-hover: #3a3a4a;

  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 12px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* ============================================
   PROGRESS BAR
   ============================================ */

.reading-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 9999;
}

#reading-progress {
  height: 100%;
  background: var(--color-accent);
  width: 0%;
  box-shadow: 0 0 10px var(--color-accent);
  transition: width 0.1s ease-out;
}

/* ============================================
   TABLE OF CONTENTS
   ============================================ */

.toc-container {
  background: rgba(24, 24, 31, 0.4);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.toc-title {
  font-size: 0.9rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.toc-title::-webkit-details-marker {
  display: none;
}

.toc-title::after {
  content: '';
  margin-left: auto;
  width: 20px;
  height: 20px;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E") center/contain no-repeat;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.toc-container[open] > .toc-title::after {
  transform: rotate(90deg);
}

.toc-container[open] > .toc-title {
  margin-bottom: var(--spacing-md);
}

.toc-count {
  font-weight: normal;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-transform: none;
  letter-spacing: 0;
}

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

.toc-item {
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

.toc-item a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  display: block;
  padding: 2px 0;
}

.toc-item a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.toc-item.level-3 {
  padding-left: var(--spacing-md);
  font-size: 0.85rem;
}

/* ============================================
   AUTHOR SECTION
   ============================================ */

.author-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.author-avatar {
  width: 64px;
  height: 64px;
  background: var(--color-accent-subtle);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.author-info h3 {
  margin: 0 0 4px 0;
  font-size: 1.1rem;
  border: none;
  padding: 0;
}

.author-info p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ============================================
   AUTOMATIC RELATED POSTS
   ============================================ */

.automatic-related {
  margin-top: 0;
}

/* ============================================
   AUTHORITY CLUSTER
   ============================================ */

.authority-cluster {
  margin-top: 0;
}

.authority-cluster h2 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  border: none;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.authority-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
  background: var(--color-bg-tertiary);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.is-authority .authority-tag {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  border-color: var(--color-accent);
  opacity: 0.8;
}

.authority-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

@media (min-width: 768px) {
  .authority-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.authority-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-decoration: none;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.authority-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--color-accent);
  opacity: 0.3;
  transition: opacity var(--transition-fast);
}

.authority-card:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.authority-card:hover::before {
  opacity: 1;
}

.authority-card-content h4 {
  margin: 0 0 4px 0;
  font-size: 1rem;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.authority-card-content p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.authority-arrow {
  font-size: 1.25rem;
  color: var(--color-accent);
  opacity: 0.5;
  transition: transform var(--transition-fast);
}

.authority-card:hover .authority-arrow {
  opacity: 1;
  transform: translateX(4px);
}

/* ============================================
   LOCATION HUB (Hierarchy Navigation)
   ============================================ */

.location-hub {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.hub-upstream {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.hub-upstream-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.hub-separator {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.hub-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-accent);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.hub-pill:hover {
  background: var(--color-accent);
  color: #fff;
}

.hub-section {
  margin-bottom: var(--spacing-lg);
}

.hub-section:last-child {
  margin-bottom: 0;
}

.hub-section h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  border: none;
  padding: 0;
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: var(--spacing-sm);
}

.hub-card {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  font-size: 0.88rem;
  color: var(--color-text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hub-card:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-hover);
  color: var(--color-accent);
}

.hub-card-icon {
  flex-shrink: 0;
}

.hub-card-highway {
  font-size: 0.82rem;
  white-space: normal;
}

.hub-grid-collapsed {
  max-height: 80px;
  overflow: hidden;
}

.hub-grid-collapsed:has(.hub-card-highway) {
  max-height: 148px;
}

.hub-grid-toggle {
  display: block;
  margin: var(--spacing-sm) auto 0;
  padding: 4px 12px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hub-grid-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

@media (max-width: 480px) {
  .hub-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hub-grid-collapsed {
    max-height: 168px;
  }
}

.automatic-related h2 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  border: none;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.related-mini-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.related-mini-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.related-mini-card h4 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  line-height: 1.4;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
  background: var(--color-bg-primary);
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  font-weight: bold;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  margin-top: var(--spacing-xl);
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
}

p {
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.75;
}

/* ============================================
   LINKS
   ============================================ */

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

a:hover {
  color: var(--color-accent-hover);
}

a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ============================================
   LISTS
   ============================================ */

ul, ol {
  color: var(--color-text-secondary);
  margin-left: var(--spacing-lg);
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.65;
}

li strong,
strong {
  color: var(--color-text-primary);
  font-weight: bold;
}

/* ============================================
   CODE
   ============================================ */

code, .code, kbd {
  font-family: var(--font-mono);
  background: var(--color-bg-tertiary);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  color: var(--color-accent);
}

/* ============================================
   SELECTION
   ============================================ */

::selection {
  background: var(--color-accent-subtle);
  color: var(--color-text-primary);
}

/* ============================================
   LAYOUT - CONTAINER
   ============================================ */

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-sm);
}

main {
  max-width: 1200px;
  margin: 0 auto;
}

/* ============================================
   HEADER
   ============================================ */

header {
  text-align: center;
}

.logo,
.brand,
header a:first-child {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.logo:hover,
.brand:hover {
  color: var(--color-accent);
}

.subtitle,
header p {
  color: var(--color-text-secondary);
  font-size: 1rem;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  text-align: center;
}

footer p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 15px;
}

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

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

/* ============================================
   BREADCRUMB
   ============================================ */

.breadcrumb,
nav[aria-label="Breadcrumb"] {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 auto var(--spacing-md);
  padding: 0;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.breadcrumb a,
nav[aria-label="Breadcrumb"] a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.breadcrumb a:hover,
nav[aria-label="Breadcrumb"] a:hover {
  color: var(--color-accent);
}

.breadcrumb span,
nav[aria-label="Breadcrumb"] span {
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* ============================================
   CATEGORY NAVIGATION
   ============================================ */

.category-nav {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: 40px;
  justify-content: center;
  padding: var(--spacing-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.category-nav-link {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.category-nav-link:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.category-nav-link.active {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================
   CATEGORY HUB INTRO
   ============================================ */

.category-hub-intro {
  background: rgba(24, 24, 31, 0.4);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  box-shadow: var(--shadow-md);
}

.hub-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.hub-icon {
  font-size: 3rem;
  background: var(--color-bg-tertiary);
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.category-hub-intro:hover .hub-icon {
  transform: scale(1.05) rotate(-2deg);
  border-color: var(--color-accent);
}

.hub-title-group h1 {
  margin: 0;
  border: none;
  padding: 0;
  font-size: 2.25rem;
  background: linear-gradient(to right, var(--color-text-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.hub-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.hub-badge {
  display: inline-block;
  background: var(--color-accent-subtle);
  color: var(--color-accent);
  font-size: 0.7rem;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 10px;
  border-radius: 20px;
  border: 1px solid var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-subtle);
}

.hub-count {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.intro-text .lead {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .category-hub-intro {
    padding: var(--spacing-lg);
  }
  
  .hub-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }
  
  .hub-icon {
    width: 60px;
    height: 60px;
    font-size: 2rem;
  }
  
  .hub-title-group h1 {
    font-size: 1.5rem;
  }
  
  .intro-text .lead {
    font-size: 1rem;
  }
}

/* ============================================
   BLOG GRID
   ============================================ */

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-top: 40px;
}

/* ============================================
   BLOG CARD
   ============================================ */

.blog-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-decoration: none;
  display: block;
  transition: all var(--transition-fast);
}

.blog-card:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.blog-icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.blog-card h2 {
  font-size: 1.05rem;
  color: var(--color-text-primary);
  margin: 0 0 0.75rem;
  border-bottom: none;
  padding-bottom: 0;
}

.blog-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.category-tag {
  display: inline-block;
  background: var(--color-accent-subtle);
  border: none;
  padding: var(--spacing-xs) 0.625rem;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  font-weight: bold;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.read-more {
  display: inline-block;
  margin-top: var(--spacing-md);
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.85rem;
}

.blog-card:hover .read-more {
  color: var(--color-accent);
}

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-2xl);
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.625rem var(--spacing-md);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination a:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-hover);
  color: var(--color-text-primary);
}

.pagination span.current {
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================
   POST COUNT
   ============================================ */

.post-count {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 30px;
}

/* ============================================
   BLOG ARTICLE
   ============================================ */

.blog-article {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  max-width: 900px;
  margin: var(--spacing-xl) auto;
}

.article-header {
  margin-bottom: var(--spacing-xl);
}

.article-meta {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-top: var(--spacing-sm);
}

.article-content {
  margin-bottom: 0;
}

.article-footer {
  margin-top: var(--spacing-md);
  text-align: left;
}

.intro {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   INFO & WARNING BOXES
   ============================================ */

.info-box {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 0 1.25rem;
  margin: var(--spacing-lg) 0;
}

.warning-box {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-error);
  border-radius: var(--radius-md);
  padding: 0 1.25rem;
  margin: var(--spacing-lg) 0;
}

.warning-box h3 {
  color: var(--color-error);
}

.tip-box {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 1.25rem var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.tip-box h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1rem;
  color: var(--color-accent);
}

.tip-box p {
  margin-bottom: 0;
}

/* ============================================
   CTA BOXES & BUTTONS
   ============================================ */

.cta-box {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  margin: var(--spacing-lg) 0;
}

.cta-box h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

.cta-box p {
  margin-bottom: var(--spacing-lg);
}

.cta-button {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 0.875rem 1.75rem;
  border: none;
  border-radius: var(--radius-md);
  font-weight: bold;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.cta-button:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* ============================================
   HERO SECTIONS
   ============================================ */

.hero {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.hero h2 {
  color: var(--color-text-primary);
  border: none;
  margin-top: 0;
}

.hero p {
  color: var(--color-text-secondary);
  margin: 20px 0 30px;
}

/* ============================================
   FINAL CTA
   ============================================ */

.final-cta {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  margin: var(--spacing-2xl) 0 var(--spacing-md) 0;
}

.final-cta h2 {
  color: var(--color-text-primary);
  border: none;
  margin-top: 0;
}

.final-cta p {
  color: var(--color-text-secondary);
  margin: 20px 0 30px;
}

.final-cta ul {
  list-style-position: inside;
  padding-left: 0;
}

/* ============================================
   FEATURE GRID
   ============================================ */

.feature-grid,
.features .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.feature-card,
.features .card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
}

.feature-card h3,
.features .card h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  color: var(--color-accent);
}

.feature-card p,
.features .card p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

.features .icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   CARD GRID (Coverage cards)
   ============================================ */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: var(--spacing-lg);
}

.card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  padding: 20px;
  border-radius: var(--radius-lg);
}

.card h3 {
  font-size: 1.1rem;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.card .count {
  font-size: 0.95rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
  font-weight: bold;
}

.card .highlights {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ============================================
   STEP-BY-STEP
   ============================================ */

.step-container {
  margin: var(--spacing-xl) 0;
}

.step {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: 1.25rem;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1rem;
}

.step-content h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
}

.step-content p {
  margin-bottom: 0;
}

/* ============================================
   FAQ SECTION
   ============================================ */

.faq-section {
  margin: var(--spacing-xl) 0;
}

.faq-item,
.faq-section details {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.faq-item h3,
.faq-section summary {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1rem;
  color: var(--color-text-primary);
  cursor: pointer;
}

.faq-section summary {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  list-style: none;
  margin-bottom: 0;
}

.faq-section summary::-webkit-details-marker {
  display: none;
}

.faq-section summary h3 {
  margin: 0;
}

.faq-section summary::before {
  content: '▶';
  font-size: 0.65em;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.faq-section details[open] > summary::before {
  transform: rotate(90deg);
}

.faq-item p,
.faq-section details p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ============================================
   TABLES
   ============================================ */

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  font-size: 0.95rem;
}

th, td {
  padding: 0.875rem var(--spacing-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

th {
  background: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  font-weight: bold;
}

tr:nth-child(even) {
  background: var(--color-bg-tertiary);
}

td {
  color: var(--color-text-secondary);
}

/* ============================================
   IMAGES
   ============================================ */

img.emoji {
  height: 1.2em;
  width: 1.2em;
  vertical-align: -0.2em;
  display: inline-block;
  margin: 0 0.05em;
}

article img {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  max-width: 100%;
  height: auto;
}

.featured-image {
  background-color: var(--color-bg-tertiary);
  background-size: cover;
  background-position: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

/* ============================================
   RELATED ARTICLES
   ============================================ */

.related-articles,
.related-links {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.related-articles h3,
.related-links h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  padding-bottom: 0;
  border-bottom: none;
}

.related-articles ul,
.related-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-articles li,
.related-links li {
  margin-bottom: var(--spacing-sm);
}

.related-articles a,
.related-links a {
  color: var(--color-text-secondary);
}

.related-articles a:hover,
.related-links a:hover {
  color: var(--color-accent);
}

/* ============================================
   ROUTE BOX
   ============================================ */

.route-box {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 1.25rem var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.route-box h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1rem;
  color: var(--color-accent);
}

.route-box ul {
  margin-bottom: 0;
  padding-left: var(--spacing-lg);
}

.route-box li {
  margin-bottom: var(--spacing-xs);
}

/* ============================================
   RANK BOX
   ============================================ */

.rank-box {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-lg) 0;
}

.rank-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.rank-number {
  flex-shrink: 0;
  font-size: 2rem;
  font-weight: bold;
  color: var(--color-accent);
  line-height: 1;
}

.rank-name {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.rank-stats {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.rank-stats p {
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
}

.rank-description {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-md);
}

.rank-description p {
  margin-bottom: 0;
}

/* ============================================
   STATE/PROVINCE GRID
   ============================================ */

.state-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-xl) 0;
}

.state-card {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.state-card strong {
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

.state-card span {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

.state-card .count {
  color: var(--color-accent);
  font-weight: bold;
  font-size: 0.85rem;
}

/* ============================================
   META INFO
   ============================================ */

.meta-info {
  background: var(--color-bg-tertiary);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 0.875rem 1.25rem;
  margin-bottom: var(--spacing-xl);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ============================================
   HEADER ADS
   ============================================ */

.ad-horizontal {
  text-align: center;
  margin: 10px 0;
}

/* Desktop: show responsive, hide mobile */
.ad-desktop { display: block; }
.ad-mobile { display: none; }

@media (max-width: 767px) {
  .ad-desktop { display: none; }
  .ad-mobile { display: block; }
}

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

.ad-footer-responsive {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

@media (max-width: 768px) {

  body {
    padding: var(--spacing-md);
  }

  /* .container, */
  .blog-article {
    padding: var(--spacing-md) 0;
    margin: var(--spacing-md) auto;
    border-radius: var(--radius-lg);
    background: none;
    border: none;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
    margin-top: var(--spacing-xl);
  }

  h3 {
    font-size: 1.1rem;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .category-nav {
    padding: 0.75rem;
  }

  .category-nav-link {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
  }

  .hero,
  .final-cta {
    padding: 30px 20px;
  }

  .cta-button {
    padding: 12px 30px;
    font-size: 1rem;
  }

  .step {
    flex-direction: column;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  table {
    font-size: 0.8rem;
  }

  th, td {
    padding: var(--spacing-sm);
  }
}