:root {
  --bg: #0a0a0f;
  --bg-card: #13131a;
  --text: #e0e0e0;
  --text-muted: #888;
  --accent: #ff3b3b;
  --accent-dim: #cc2e2e;
  --border: #222;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Navigation */
.navbar {
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 1px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 24px;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--text);
}

/* Main */
main {
  flex: 1;
  padding: 40px 0;
}

/* Hero */
.hero {
  text-align: center;
  padding: 80px 0 60px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 60px 0;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: transform 0.2s, border-color 0.2s;
}

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

.feature-card h2 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--accent);
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Structure / Org Chart */
.structure {
  margin: 60px 0;
}

.structure h2 {
  text-align: center;
  margin-bottom: 32px;
  font-size: 1.5rem;
}

.org-chart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.org-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 24px;
  text-align: center;
  font-weight: 600;
}

.org-node.center {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  font-size: 1.1rem;
}

.org-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  width: 100%;
}

/* Sections grid */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.section-card h2 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.section-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

/* Knowledge categories */
.knowledge-categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.knowledge-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.knowledge-card h2 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.knowledge-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.doc-count {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--accent);
}

/* Docs */
.doc-list {
  list-style: none;
  margin-top: 24px;
}

.doc-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.doc-list a {
  color: var(--text);
  text-decoration: none;
}

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

.status {
  font-size: 0.8rem;
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 12px;
}

.status.draft { background: #333; color: #ffa500; }
.status.approved { background: #1a3a1a; color: #4caf50; }

/* Doc content */
.doc-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  margin-top: 24px;
}

.doc-content h2 {
  margin: 24px 0 12px;
  color: var(--accent);
}

.doc-content ol, .doc-content ul {
  margin-left: 24px;
}

.doc-content li {
  margin: 8px 0;
  color: var(--text-muted);
}

.meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* Knowledge search */
.knowledge-search {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 40px;
}

.knowledge-search h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  color: var(--accent);
}

.search-box {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.search-box input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: var(--font);
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.search-box button {
  padding: 12px 24px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: background 0.2s;
}

.search-box button:hover {
  background: var(--accent-dim);
}

.search-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.85rem;
}

.search-filters label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  cursor: pointer;
}

.search-filters input[type=checkbox] {
  accent-color: var(--accent);
}

.search-results {
  min-height: 60px;
}

.search-hint, .search-loading, .search-empty, .search-error {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 16px 0;
}

.search-error {
  color: var(--accent);
}

.search-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.search-result-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
}

.search-result-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text);
}

.result-snippet {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

.result-meta {
  font-size: 0.8rem;
  color: var(--accent);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-card);
  padding: 24px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Articles */
.page-description {
  color: var(--text-muted);
  margin-bottom: 32px;
}

.articles-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-decoration: none;
  transition: transform 0.2s, border-color 0.2s;
}

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

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

.article-section-tag {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.article-card h2 {
  color: var(--text);
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.article-card-summary {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 12px;
}

.article-read-more {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
}

.article-card-meta time {
  color: var(--text-muted);
}

/* Full article page */
.article-full {
  max-width: 760px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.article-meta-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.85rem;
}

.article-meta-top time {
  color: var(--text-muted);
}

.article-header h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}

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

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-body p {
  margin-bottom: 16px;
  color: var(--text);
}

.article-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: var(--accent);
}

.article-body ul, .article-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.article-body strong {
  color: var(--text);
}

/* Recent articles on homepage */
.recent-articles {
  margin: 40px 0;
}

.recent-articles h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.recent-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.recent-articles-grid .feature-card {
  display: block;
  text-decoration: none;
  color: inherit;
}

.recent-articles-grid .feature-card h2 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  text-align: left;
}

.recent-articles-grid .feature-card p {
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.recent-article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.recent-articles-footer {
  text-align: center;
  margin-top: 20px;
}

.btn-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 20px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  transition: background 0.2s;
}

.btn-link:hover {
  background: var(--accent);
  color: white;
}

/* Articles listing */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

.article-card {
  display: block;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s;
}

.article-card:hover {
  border-color: var(--accent-dim);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 0.82rem;
}

.article-card h2 {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.article-card-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.article-read-more {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

/* Article full page */
.article-full {
  max-width: 720px;
  margin: 32px auto;
}

.article-header {
  margin-bottom: 28px;
}

.article-meta-top {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  font-size: 0.85rem;
}

.article-section-tag {
  background: var(--accent-dim);
  color: white;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article-full h1 {
  font-size: 1.75rem;
  line-height: 1.3;
  margin-bottom: 8px;
}

.article-author {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.article-body {
  font-size: 1rem;
  line-height: 1.7;
}

.article-body h2 {
  font-size: 1.25rem;
  margin: 28px 0 12px;
  color: var(--accent);
}

.article-body h3 {
  font-size: 1.1rem;
  margin: 20px 0 8px;
}

.article-body p {
  margin-bottom: 14px;
}

.article-body ul, .article-body ol {
  margin: 12px 0 12px 24px;
}

.article-body li {
  margin-bottom: 6px;
}

.article-body a {
  color: var(--accent);
}

.article-body blockquote {
  border-left: 3px solid var(--accent-dim);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-muted);
  font-style: italic;
}

.article-body pre {
  background: var(--bg-card);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
  font-size: 0.9rem;
  border: 1px solid var(--border);
}

/* Verification badges */
.article-verification {
  display: inline-flex;
  gap: 4px;
  flex-wrap: wrap;
}

.verification-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.verification-badge.L1 {
  background: #1a4a1a;
  color: #4ade80;
}

.verification-badge.L1.pending {
  background: #4a3a1a;
  color: #fbbf24;
}

.verification-badge.L2 {
  background: #1a2a4a;
  color: #60a5fa;
}

.verification-badge.L2.pending {
  background: #3a1a3a;
  color: #c084fc;
}

.verification-badge.L3 {
  background: #3a1a1a;
  color: #f87171;
}

.verification-badge.L3.pending {
  background: #3a2a1a;
  color: #fb923c;
}

/* Verification table */
.verification-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.85rem;
}

.verification-table th {
  text-align: left;
  padding: 10px 12px;
  background: var(--bg-card);
  border-bottom: 2px solid var(--border);
  font-weight: 600;
}

.verification-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.verification-table td.verif-ok {
  color: #4ade80;
}

.verification-table td.verif-pending {
  color: #fbbf24;
}

.verification-table td.verif-na {
  color: var(--text-muted);
}

.verification-table a {
  color: var(--accent);
  text-decoration: none;
}

.verification-table a:hover {
  text-decoration: underline;
}

/* Doc content styling */
.doc-content h2 {
  margin: 28px 0 12px;
  color: var(--accent);
}

.doc-content h3 {
  margin: 20px 0 10px;
}

.doc-content p {
  margin-bottom: 12px;
}

.doc-content ul, .doc-content ol {
  margin: 12px 0 12px 24px;
}

.doc-content li {
  margin-bottom: 6px;
}

.doc-content pre {
  background: var(--bg-card);
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin: 16px 0;
  font-size: 0.88rem;
}

.doc-content blockquote {
  border-left: 3px solid var(--accent-dim);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--text-muted);
}

/* Doc list */
.doc-list {
  list-style: none;
  margin: 20px 0;
}

.doc-list li {
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
}

.doc-list a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.doc-list a:hover {
  text-decoration: underline;
}

.status {
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 8px;
}

.status.draft {
  background: #3a3a1a;
  color: #fbbf24;
}

.status.published {
  background: #1a4a1a;
  color: #4ade80;
}

/* Courses page */
.course-track {
  margin-bottom: 48px;
}

.course-track h2 {
  font-size: 1.5rem;
  margin-bottom: 8px;
  color: var(--accent);
}

.course-track > p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  transition: border-color 0.2s;
}

.course-card:hover {
  border-color: var(--accent-dim);
}

.course-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--text);
}

.course-card.external h3 {
  color: var(--accent);
}

.course-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.course-level {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.course-level.basic {
  background: #1a3a1a;
  color: #4ade80;
}

.course-level.advanced {
  background: #3a1a3a;
  color: #c084fc;
}

.course-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.course-card ul {
  list-style: none;
  margin: 12px 0 0;
}

.course-card ul li {
  padding: 6px 0;
  font-size: 0.9rem;
}

.course-card ul li a {
  color: var(--accent);
  text-decoration: none;
}

.course-card ul li a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .features { grid-template-columns: 1fr; }
  .org-row { grid-template-columns: repeat(2, 1fr); }
  .sections-grid { grid-template-columns: 1fr; }
  .knowledge-categories { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .nav-links a { margin-left: 16px; font-size: 0.8rem; }
}