/* ===================================
   Article Page Styles
   =================================== */

/* ---------- Article Container ---------- */
.article-container {
  padding-top: 100px;
  max-width: 900px;
  margin: 0 auto;
}

/* ---------- Breadcrumb ---------- */
.article-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.article-breadcrumb a:hover {
  color: var(--text-primary);
}

.article-breadcrumb .current {
  color: var(--text-primary);
}

/* ---------- Article Header ---------- */
.article-header {
  margin-bottom: 2rem;
}

.article-category-tag {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.article-category-tag .tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 14px;
  border-radius: 50px;
  background: rgba(0, 229, 255, 0.08);
  color: var(--accent);
  border: 1px solid rgba(0, 229, 255, 0.15);
  transition: var(--transition);
}

.article-category-tag .tag:hover {
  background: rgba(0, 229, 255, 0.18);
  box-shadow: 0 0 12px var(--accent-glow);
}

.article-title {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.article-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-weight: 300;
}

/* ---------- Article Meta ---------- */
.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.meta-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.author-avatar-lg {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
  flex-shrink: 0;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 600;
  font-size: 1rem;
}

.author-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.meta-details {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.meta-item svg {
  flex-shrink: 0;
  color: var(--text-secondary);
}

/* ---------- Article Cover ---------- */
.article-cover {
  margin-bottom: 2.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.cover-placeholder {
  height: 360px;
  position: relative;
  background: linear-gradient(135deg, #0a1628 0%, #0d1f3c 30%, #1a0a28 70%, #0d1f3c 100%);
}

.cover-pattern {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(0, 229, 255, 0.25) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(180, 77, 255, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(255, 60, 172, 0.12) 0%, transparent 40%);
}

.cover-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.06) 1px, transparent 1px);
  background-size: 50px 50px;
}

.cover-glow-top {
  position: absolute;
  top: -50%;
  left: 20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
}

.cover-glow-bottom {
  position: absolute;
  bottom: -30%;
  right: 10%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(180, 77, 255, 0.06) 0%, transparent 70%);
}

/* ---------- Article Layout (TOC + Body) ---------- */
.article-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  position: relative;
}

/* ---------- TOC Sidebar ---------- */
.article-toc {
  position: relative;
}

.toc-sticky {
  position: sticky;
  top: 100px;
}

.toc-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.toc-list {
  list-style: none;
  border-left: 1px solid var(--border-subtle);
  padding-left: 1rem;
}

.toc-list li {
  margin-bottom: 0.5rem;
}

.toc-list a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: var(--transition);
  display: block;
  line-height: 1.5;
}

.toc-list a:hover,
.toc-list li.active a {
  color: var(--accent);
}

/* ---------- Article Body ---------- */
.article-body {
  min-width: 0;
}

.article-body > section {
  margin-bottom: 3rem;
}

.article-body h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.article-body h2::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--gradient-1);
  border-radius: 1px;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
}

.article-body p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---------- Article Figure ---------- */
.article-figure {
  margin: 2rem 0;
}

.figure-placeholder {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 2rem;
}

.figure-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.diagram-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.diagram-row.split {
  gap: 1rem;
}

.diagram-node {
  padding: 10px 24px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  border: 1px solid var(--border-glow);
  text-align: center;
}

.diagram-node.input,
.diagram-node.output {
  background: rgba(0, 229, 255, 0.05);
  color: var(--accent);
}

.diagram-node.router {
  background: rgba(180, 77, 255, 0.05);
  color: var(--accent2);
  border-color: rgba(180, 77, 255, 0.25);
}

.diagram-node.expert {
  background: rgba(0, 229, 255, 0.03);
  color: var(--text-primary);
  font-size: 0.75rem;
  min-width: 80px;
}

.diagram-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
  font-family: var(--font-mono);
}

.article-figure figcaption {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  font-family: var(--font-mono);
}

/* ---------- Blockquote ---------- */
.article-quote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--accent);
  background: rgba(0, 229, 255, 0.03);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.article-quote p {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.article-quote cite {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ---------- Code Block ---------- */
.article-code-block {
  margin: 1.5rem 0;
  background: #0a0a16;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-subtle);
}

.code-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dot.red { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #27c93f; }

.code-lang {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.article-code-block pre {
  padding: 1.5rem;
  overflow-x: auto;
  margin: 0;
}

.article-code-block code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: #c9d1d9;
}

.code-block code .kw { color: #ff7b72; }
.code-block code .cls { color: #d2a8ff; }
.code-block code .func { color: #d2a8ff; }
.code-block code .self { color: #ff7b72; }
.code-block code .cm { color: #8b949e; font-style: italic; }

/* ---------- Table ---------- */
.article-table-wrapper {
  margin: 1.5rem 0;
  overflow-x: auto;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.article-table thead {
  border-bottom: 2px solid var(--border-glow);
}

.article-table th {
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
}

.article-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

.article-table tbody tr:hover td {
  background: rgba(0, 229, 255, 0.02);
}

/* ---------- Article List ---------- */
.article-list {
  margin: 1rem 0;
  padding-left: 1.25rem;
}

.article-list li {
  margin-bottom: 0.65rem;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 0.98rem;
}

.article-list li strong {
  color: var(--text-primary);
}

/* ---------- Tags Footer ---------- */
.article-tags-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-subtle);
  margin-top: 2rem;
}

.article-tags-footer .tag {
  text-decoration: none;
  transition: var(--transition);
}

.article-tags-footer .tag:hover {
  background: rgba(0, 229, 255, 0.18);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ---------- Share ---------- */
.article-share {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.share-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  padding: 6px 14px;
  border: 1px solid var(--border-subtle);
  border-radius: 50px;
  transition: var(--transition);
}

.share-btn:hover {
  border-color: var(--accent);
  background: rgba(0, 229, 255, 0.05);
}

/* ---------- Author Card ---------- */
.author-card {
  display: flex;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0 3rem;
}

.author-card-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.5rem;
  color: #fff;
  flex-shrink: 0;
}

.author-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.author-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.author-card-social {
  display: flex;
  gap: 1rem;
}

.author-card-social a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  transition: var(--transition);
}

.author-card-social a:hover {
  color: var(--text-primary);
}

/* ---------- Comments ---------- */
.comments-section {
  padding-top: 1rem;
}

.comments-section h3 {
  font-size: 1.3rem;
  margin-bottom: 1.5rem;
}

.comments-section h3 span {
  color: var(--text-muted);
  font-weight: 400;
}

.comment-form-wrapper {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.comment-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  flex-shrink: 0;
}

.comment-form {
  flex: 1;
}

.comment-form textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  color: var(--text-primary);
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  resize: vertical;
  outline: none;
  transition: var(--transition);
}

.comment-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.comment-form textarea::placeholder {
  color: var(--text-muted);
}

.comment-form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
}

.comment-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Comment List */
.comment-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.comment {
  display: flex;
  gap: 1rem;
}

.comment-body {
  flex: 1;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

.comment-author {
  font-weight: 600;
  font-size: 0.9rem;
}

.comment-badge {
  font-size: 0.7rem;
  background: var(--gradient-1);
  color: #000;
  padding: 1px 8px;
  border-radius: 50px;
  font-weight: 600;
}

.comment-time {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.comment-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

.comment-actions {
  display: flex;
  gap: 1rem;
}

.comment-actions button {
  background: none;
  border: none;
  font-size: 0.78rem;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-mono);
  transition: var(--transition);
  padding: 0;
}

.comment-actions button:hover {
  color: var(--accent);
}

/* ---------- Related Posts ---------- */
.related-posts {
  margin: 4rem 0 3rem;
}

.related-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
}

.related-title::before {
  content: '// ';
  color: var(--accent);
  font-weight: 400;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.related-grid .blog-card .card-image {
  height: 150px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-toc {
    display: none;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .article-title {
    font-size: 1.8rem;
  }

  .article-subtitle {
    font-size: 1rem;
  }

  .article-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-details {
    gap: 1rem;
  }

  .cover-placeholder {
    height: 220px;
  }

  .article-body h2 {
    font-size: 1.3rem;
  }

  .author-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .author-card-social {
    justify-content: center;
  }

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