.blog-container { max-width: 1180px; margin-inline: auto; padding-inline: var(--container-pad); }
.blog-narrow { max-width: 780px; margin-inline: auto; }

.blog-hero {
  padding-block: clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-8);
}
.blog-hero h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.25rem);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.blog-hero p {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 720px;
}

.blog-layout {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
}
@media (min-width: 1024px) {
  .blog-layout { grid-template-columns: 1fr 280px; gap: var(--space-10); }
}

.blog-main { min-width: 0; }
.blog-sidebar { display: flex; flex-direction: column; gap: var(--space-5); }

.blog-sidebar-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.blog-sidebar-card h3 {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}
.blog-sidebar-card ul { display: flex; flex-direction: column; gap: 0.5rem; }
.blog-sidebar-card a {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.5;
  transition: color var(--transition);
}
.blog-sidebar-card a:hover { color: var(--color-primary); }
.blog-sidebar-card a.is-active { color: var(--color-primary); font-weight: 600; }

.blog-card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.blog-card {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.blog-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
@media (min-width: 640px) {
  .blog-card { grid-template-columns: 1fr 160px; align-items: center; }
}
.blog-card-body { display: flex; flex-direction: column; gap: 0.5rem; }
.blog-card-category {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-teal);
  background: var(--color-teal-light);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  align-self: flex-start;
}
.blog-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
}
.blog-card-title a { color: inherit; }
.blog-card-title a:hover { color: var(--color-primary); }
.blog-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.blog-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: auto;
}
.blog-card-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  font-size: 3rem;
  color: var(--color-text);
  font-weight: 700;
}

/* ARTICLE PAGE */

.article-header {
  padding-block: var(--space-8) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
}
.article-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-teal);
  background: var(--color-teal-light);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}
.article-h1 {
  font-size: clamp(1.85rem, 3vw + 1rem, 2.75rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.article-lede {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}
.article-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  padding-block: var(--space-3);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.article-byline-item { display: flex; align-items: center; gap: 0.4rem; }
.article-byline strong { color: var(--color-text); font-weight: 600; }

/* DIRECT ANSWER BOX — GEO/AEO critical */

.article-answer {
  margin-block: var(--space-6);
  padding: var(--space-5);
  background: var(--color-teal-light);
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius-md);
}
.article-answer-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-teal);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-2);
}
.article-answer p {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
}

/* TOC */

.article-toc {
  margin-block: var(--space-6);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.article-toc summary {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.article-toc summary::after {
  content: "▾";
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.article-toc[open] summary::after { content: "▴"; }
.article-toc ol {
  list-style: none;
  padding: 0;
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  counter-reset: toc;
}
.article-toc li {
  counter-increment: toc;
  font-size: 0.9rem;
  line-height: 1.5;
}
.article-toc li::before {
  content: counter(toc) ". ";
  font-weight: 600;
  color: var(--color-text-muted);
}
.article-toc a { color: var(--color-text); }
.article-toc a:hover { color: var(--color-primary); }

/* ARTICLE BODY */

.article-body {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text);
}
.article-body > * + * { margin-top: 1.5em; }

.article-body h2 {
  font-size: clamp(1.375rem, 1.5vw + 1rem, 1.75rem);
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin-top: 2.5em;
  margin-bottom: 0.5em;
  color: var(--color-text);
  scroll-margin-top: calc(var(--header-height) + 20px);
}
.article-body h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  line-height: 1.4;
  margin-top: 2em;
  margin-bottom: 0.5em;
  color: var(--color-text);
  scroll-margin-top: calc(var(--header-height) + 20px);
}
.article-body p {
  color: var(--color-text);
  line-height: 1.75;
}
.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition);
}
.article-body a:hover { color: var(--color-primary-hover); }

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
  color: var(--color-text);
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.5em; line-height: 1.7; }
.article-body li::marker { color: var(--color-teal); }

.article-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-xs);
}
.article-body pre {
  background: #0F172A;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.65;
  color: #E2E8F0;
  margin-block: 1.5em;
}
.article-body pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 1.5em;
  font-size: 0.9375rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.article-body th,
.article-body td {
  padding: 0.75rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.article-body th {
  background: var(--color-bg);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.article-body tr:last-child td { border-bottom: none; }

.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-2) 0 var(--space-2) var(--space-5);
  margin-block: 1.5em;
  font-size: 1.0625rem;
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: 2.5em;
}

.article-callout {
  margin-block: 1.5em;
  padding: var(--space-4) var(--space-5);
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--color-text);
}
.article-callout strong { color: var(--color-primary); }

.article-callout-warn {
  background: #FEF3C7;
  border-left-color: #D97706;
}
.article-callout-warn strong { color: #92400E; }

/* FAQ accordion inside articles */

.article-faq { margin-top: 2.5em; }
.article-faq h2 { margin-top: 0; }

/* Article footer */

.article-footer {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-6);
}
.article-tag {
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
}

.article-author-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
}
.article-author-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}
.article-author-info { display: flex; flex-direction: column; gap: 0.35rem; }
.article-author-name { font-size: 1rem; font-weight: 700; color: var(--color-text); }
.article-author-bio { font-size: 0.875rem; color: var(--color-text-secondary); line-height: 1.6; }

.article-related-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .article-related-grid { grid-template-columns: repeat(3, 1fr); } }

.article-share {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: var(--space-4);
}
.article-share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
  min-height: 38px;
}
.article-share-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Sticky TOC sidebar in articles */

.article-sticky-toc {
  display: none;
}
@media (min-width: 1180px) {
  .article-sticky-toc {
    display: block;
    position: sticky;
    top: calc(var(--header-height) + 24px);
    padding: var(--space-5);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    max-height: calc(100vh - var(--header-height) - 48px);
    overflow-y: auto;
  }
  .article-sticky-toc h3 {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-3);
  }
  .article-sticky-toc ul { display: flex; flex-direction: column; gap: 0.4rem; }
  .article-sticky-toc a {
    display: block;
    padding: 0.4rem 0.6rem;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    border-left: 2px solid transparent;
    line-height: 1.4;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
  }
  .article-sticky-toc a:hover { color: var(--color-text); background: var(--color-bg); }
  .article-sticky-toc a.is-active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    background: var(--color-primary-light);
    font-weight: 600;
  }
}

.article-layout {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--container-pad);
}
@media (min-width: 1180px) {
  .article-layout { grid-template-columns: minmax(0, 1fr) 260px; gap: var(--space-10); }
}

.blog-empty {
  padding: var(--space-12) var(--space-4);
  text-align: center;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}