/* ============================================================
   ARTICLE DETAIL PAGE (bai-viet.php)
   ============================================================ */

/* Layout grid: main content + sidebar */
.article-layout {
  padding: 60px 0 80px;
}
.article-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
}

/* ---- Meta bar (tag + time/serve/diff) ---- */
.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.article-tag {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--primary);
  padding: 4px 12px;
  border-radius: 20px;
}
.article-meta-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  color: var(--text-light);
}
.article-meta-items span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ---- Featured image ---- */
.article-featured-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 36px;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16/9;
}
.article-featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---- Article body typography ---- */
.article-body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text);
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--dark);
  margin: 36px 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}
.article-body h2:first-child {
  margin-top: 0;
}
.article-body p {
  margin-bottom: 16px;
}
.article-body ul {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}
.article-body ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
  font-size: 0.97rem;
  line-height: 1.75;
}
.article-body ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.6;
}
.article-body strong {
  font-weight: 600;
  color: var(--dark);
}

/* ---- Footer nav (back buttons) ---- */
.article-footer-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

/* ---- Sidebar widgets ---- */
.article-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-widget {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  padding: 24px;
}
.sidebar-widget-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}

/* Sidebar related posts list */
.sidebar-posts {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.sidebar-post-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  text-decoration: none;
  padding: 8px;
  margin: -8px;
  border-radius: var(--radius);
  transition: background var(--transition);
}
.sidebar-post-item:hover {
  background: var(--bg-2);
}
.sidebar-post-img {
  width: 80px;
  min-width: 80px;
  height: 56px;
  border-radius: 6px;
  overflow: hidden;
}
.sidebar-post-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.sidebar-post-item:hover .sidebar-post-img img {
  transform: scale(1.08);
}
.sidebar-post-info {
  flex: 1;
  min-width: 0;
}
.sidebar-post-tag {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 4px;
}
.sidebar-post-title {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sidebar-post-meta {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: var(--text-light);
}

/* Sidebar CTA widget */
.sidebar-cta {
  text-align: center;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  color: white;
}
.sidebar-cta-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}
.sidebar-cta h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.sidebar-cta p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
  margin-bottom: 20px;
}

/* Small button variant */
.btn-sm {
  font-size: 0.8rem !important;
  padding: 8px 20px !important;
}

/* btn-primary & btn-outline (ensure defined if missing) */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-ui); font-size: 0.88rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  background: var(--primary); color: white;
  padding: 12px 28px; border-radius: 30px;
  border: none; cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(181,72,72,0.3);
}
.btn-primary:hover {
  background: var(--primary-dk);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(181,72,72,0.4);
}
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-ui); font-size: 0.85rem; font-weight: 500;
  letter-spacing: 0.06em; text-transform: uppercase;
  border: 1.5px solid var(--primary); color: var(--primary);
  padding: 10px 24px; border-radius: 30px;
  transition: background var(--transition), color var(--transition);
}
.btn-outline:hover {
  background: var(--primary); color: white;
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .article-grid {
    grid-template-columns: 1fr 300px;
    gap: 36px;
  }
}
@media (max-width: 800px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
  }
}
@media (max-width: 600px) {
  .article-layout {
    padding: 40px 0 60px;
  }
  .article-meta-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .article-footer-nav {
    flex-direction: column;
  }
}