:root {
  --bg: #141218;
  --surface: #201e25;
  --surface-card: #27242e;
  --surface-elevated: #312e3a;
  --text: #e6e0e9;
  --text-secondary: #b3afba;
  --accent: #c1d447;
  --accent-hover: #d2e458;
  --accent-text: #141218;
  --border: #36343e;
  --border-focus: #c1d447;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --container-max: 1120px;
  --article-max: 42rem;
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1.0625rem; /* ~17px */
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem; /* 20px */
}

/* Demo Banner */
.demo-banner {
  background-color: #3b3011;
  color: #f7df94;
  border-bottom: 1px solid #735e22;
  padding: 0.5rem 1rem;
  text-align: center;
  font-size: 0.875rem;
}

/* Header */
.site-header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: block;
  width: 2rem;
  height: 2rem;
  flex: 0 0 auto;
}

.brand-link:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-link:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Main Layout */
.site-main {
  flex: 1;
  padding: 2.5rem 0 4rem;
}

/* Breadcrumbs */
.breadcrumb {
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: 0.5rem;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--border);
}

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

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

/* Article Page */
.article-container {
  max-width: var(--article-max);
}

.article-header {
  margin-bottom: 2rem;
}

.article-meta-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.category-badge {
  background-color: var(--surface-card);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.read-time {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.article-title {
  font-size: 2.25rem;
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text);
}

.article-byline-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.article-lead {
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--text);
  font-weight: 400;
}

.article-hero {
  margin: 1.5rem 0 2.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--surface-card);
  border: 1px solid var(--border);
}

.article-hero img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.hero-caption {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  background-color: var(--surface);
  border-top: 1px solid var(--border);
}

/* Article Body Typography */
.article-body h2 {
  font-size: 1.625rem;
  line-height: 1.3;
  margin: 2.5rem 0 1rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}

.article-body h3 {
  font-size: 1.3125rem;
  line-height: 1.35;
  margin: 2rem 0 0.75rem;
  color: var(--text);
}

.article-body p {
  margin-bottom: 1.25rem;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.4rem;
}

.article-body blockquote {
  border-left: 3px solid var(--accent);
  background-color: var(--surface);
  padding: 0.875rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-secondary);
  font-style: italic;
}

.article-body pre {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--surface-card);
  padding: 0.15em 0.35em;
  border-radius: 4px;
}

/* Table Responsive Scrolling */
.table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

th, td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

th {
  background-color: var(--surface);
  color: var(--text);
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

/* Related Searches Preview (Local Design Mock Only) */
.related-searches-preview {
  margin: 3rem 0;
  padding: 1.5rem;
  background-color: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.preview-badge {
  font-size: 0.75rem;
  color: #f7df94;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.related-searches-title {
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.related-search-chips {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.search-chip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--surface-card);
  border: 1px solid var(--border);
  padding: 0.875rem 1rem;
  border-radius: var(--radius);
  color: #79c0ff;
  font-weight: 500;
  min-height: 48px;
}

/* Sources Section */
.article-sources {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.sources-title {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.sources-list {
  list-style: none;
  font-size: 0.875rem;
}

.source-item {
  margin-bottom: 0.5rem;
}

.source-pub, .source-date {
  color: var(--text-secondary);
  margin-left: 0.35rem;
}

/* Related Articles Grid */
.related-articles-section {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.related-title {
  font-size: 1.375rem;
  margin-bottom: 1.25rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.card {
  background-color: var(--surface-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  border-color: var(--border-focus);
}

.card-title {
  font-size: 1.0625rem;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.card-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Service Pages */
.page-container {
  max-width: var(--article-max);
}

.page-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}

.page-title {
  font-size: 2.25rem;
  font-weight: 800;
}

.page-body h2 {
  font-size: 1.5rem;
  margin: 2rem 0 0.75rem;
}

.page-body p {
  margin-bottom: 1.25rem;
}

/* Footer */
.site-footer {
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  margin-top: auto;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-secondary);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

/* Responsive Breakpoints & Utilities */
.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;
}

/* Homepage Styles */
.home-intro-section {
  margin-bottom: 2.5rem;
  max-width: 800px;
}

.home-intro-text {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.featured-section {
  margin-bottom: 3.5rem;
}

.featured-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .featured-grid {
    grid-template-columns: 7fr 5fr;
  }
}

.card-lead {
  display: flex;
  flex-direction: column;
}

.card-media {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1rem;
}

.card-media img, .card-media-secondary img, .card-media-compact img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.card-title-lead {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0.75rem 0 0.5rem;
}

.card-title-lead a {
  color: var(--text);
}

.card-title-lead a:hover {
  color: var(--accent);
}

.card-excerpt-lead {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1rem;
}

.secondary-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card-secondary {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card-title-secondary {
  font-size: 1.1875rem;
  line-height: 1.35;
  margin-top: 0.4rem;
}

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

.card-title-secondary a:hover {
  color: var(--accent);
}

/* Sections */
.topic-group-section, .latest-section {
  margin-bottom: 3.5rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.section-more-link {
  font-size: 0.875rem;
  font-weight: 500;
}

.topic-grid, .latest-grid, .catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card-meta {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  display: flex;
  gap: 0.75rem;
}

/* Catalog Listing & Pagination */
.listing-header, .topic-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.25rem;
}

.listing-title, .topic-title {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.listing-subtitle, .topic-subtitle {
  color: var(--text-secondary);
}

.pagination {
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.pagination-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-link {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.page-link:hover {
  background-color: var(--surface-card);
  border-color: var(--border-focus);
  text-decoration: none;
}

.page-link.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.page-info {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Topics Directory */
.topics-directory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card-topic-dir {
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card-topic-dir:hover {
  border-color: var(--border-focus);
}

.topic-dir-link {
  display: block;
}

.card-count {
  font-size: 0.875rem;
  color: var(--accent);
  margin-top: 0.5rem;
}

/* 404 Not Found */
.notfound-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4rem 1.25rem;
}

.notfound-card {
  max-width: 600px;
  text-align: center;
  padding: 3rem 2rem;
}

.notfound-title {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.notfound-lead {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.notfound-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

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

.btn-secondary {
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

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

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (max-width: 600px) {
  .nav-category {
    display: none;
  }

  .article-title, .listing-title, .topic-title {
    font-size: 1.75rem;
  }
}