/* ========================================
   MEMSEM - Blog / Knowledge Base Styles
   ======================================== */

/* --- Blog Listing Page --- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.blog-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: white;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

.blog-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--gray-100);
}

.blog-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  font-size: 0.8125rem;
  color: var(--gray-400);
}

.blog-card-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.blog-card-tag.tag-guide { background: rgba(26,86,219,0.08); color: var(--primary); }
.blog-card-tag.tag-material { background: rgba(139,92,246,0.08); color: #7c3aed; }
.blog-card-tag.tag-process { background: rgba(16,185,129,0.08); color: #059669; }
.blog-card-tag.tag-tips { background: rgba(249,115,22,0.08); color: var(--accent); }
.blog-card-tag.tag-industry { background: rgba(220,38,38,0.08); color: #dc2626; }
.blog-card-tag.tag-faq { background: rgba(6,182,212,0.08); color: #0891b2; }

.blog-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 10px;
  line-height: 1.4;
  transition: var(--transition);
}

.blog-card:hover h3 { color: var(--primary); }

.blog-card p {
  font-size: 0.875rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
  font-size: 0.8125rem;
}

.blog-card-read {
  color: var(--primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.blog-card:hover .blog-card-read { gap: 8px; }

/* --- Blog Category Sidebar --- */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.blog-sidebar {
  position: sticky;
  top: 96px;
}

.blog-sidebar-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.blog-sidebar-card h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gray-100);
}

.blog-category-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--gray-600);
  transition: var(--transition);
  margin-bottom: 2px;
}

.blog-category-list a:hover,
.blog-category-list a.active {
  background: rgba(26,86,219,0.06);
  color: var(--primary);
}

.blog-category-count {
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  color: var(--gray-500);
}

.blog-popular-item {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-100);
}

.blog-popular-item:last-child { border-bottom: none; }

.blog-popular-num {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--gray-500);
  flex-shrink: 0;
}

.blog-popular-item:nth-child(1) .blog-popular-num { background: rgba(26,86,219,0.1); color: var(--primary); }
.blog-popular-item:nth-child(2) .blog-popular-num { background: rgba(26,86,219,0.08); color: var(--primary); }
.blog-popular-item:nth-child(3) .blog-popular-num { background: rgba(26,86,219,0.06); color: var(--primary); }

.blog-popular-text {
  font-size: 0.875rem;
  color: var(--gray-700);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- Blog Article Page --- */
.blog-article {
  max-width: 800px;
  margin: 0 auto;
}

.blog-article-header {
  text-align: center;
  margin-bottom: 48px;
}

.blog-article-header .blog-card-tag { margin-bottom: 16px; }

.blog-article-header h1 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: 16px;
  line-height: 1.3;
}

.blog-article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  font-size: 0.875rem;
  color: var(--gray-400);
}

.blog-article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.blog-article-content {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--gray-700);
}

.blog-article-content h2 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}

.blog-article-content h3 {
  font-size: 1.25rem;
  margin: 32px 0 12px;
}

.blog-article-content p {
  margin-bottom: 20px;
  color: var(--gray-600);
  line-height: 1.9;
}

.blog-article-content ul,
.blog-article-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.blog-article-content li {
  margin-bottom: 8px;
  color: var(--gray-600);
  line-height: 1.8;
  list-style: disc;
}

.blog-article-content ol li { list-style: decimal; }

.blog-article-content strong {
  color: var(--gray-800);
  font-weight: 600;
}

/* Info callout box */
.blog-callout {
  background: linear-gradient(135deg, rgba(26,86,219,0.04), rgba(26,86,219,0.08));
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  margin: 24px 0;
}

.blog-callout-title {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  font-size: 0.9375rem;
}

.blog-callout p { margin-bottom: 0; }

/* Comparison table in articles */
.blog-table-wrapper {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}

.blog-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.blog-table th {
  background: var(--gray-50);
  padding: 14px 16px;
  text-align: left;
  font-weight: 700;
  color: var(--gray-800);
  border-bottom: 2px solid var(--gray-200);
  white-space: nowrap;
}

.blog-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-600);
}

.blog-table tr:last-child td { border-bottom: none; }
.blog-table tr:hover td { background: var(--gray-50); }

/* Blog navigation */
.blog-nav {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--gray-200);
}

.blog-nav-item {
  flex: 1;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.blog-nav-item:hover {
  border-color: var(--primary);
  background: rgba(26,86,219,0.02);
}

.blog-nav-label {
  font-size: 0.75rem;
  color: var(--gray-400);
  margin-bottom: 4px;
}

.blog-nav-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--gray-700);
}

/* Blog CTA */
.blog-cta {
  background: linear-gradient(135deg, #1e3a5f, #1a56db);
  border-radius: var(--radius-xl);
  padding: 48px;
  text-align: center;
  margin-top: 48px;
  position: relative;
  overflow: hidden;
}

.blog-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(249,115,22,0.15), transparent 60%);
}

.blog-cta > * { position: relative; z-index: 1; }

.blog-cta h3 {
  color: white;
  margin-bottom: 12px;
  font-size: 1.5rem;
}

.blog-cta p {
  color: rgba(255,255,255,0.7);
  margin-bottom: 24px;
}

/* --- Homepage Blog Preview (mobile-first) --- */
.blog-preview-flex {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.blog-preview-left {
  display: flex;
}

.blog-preview-left .blog-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
}

.blog-preview-left .blog-card-img {
  height: 100%;
  min-height: 220px;
  object-fit: cover;
}

.blog-preview-left .blog-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
}

.blog-preview-left .blog-card-body p {
  font-size: 0.9375rem;
  line-height: 1.85;
  margin-top: 10px;
  display: block !important;
  -webkit-line-clamp: unset !important;
  overflow: visible !important;
}

.blog-preview-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.blog-preview-right .blog-card-img {
  height: 160px;
  object-fit: cover;
}

.blog-preview-right .blog-card-body {
  padding: 16px;
}

.blog-preview-right .blog-card h3 {
  font-size: 0.9375rem;
  margin-bottom: 6px;
}

.blog-preview-right .blog-card p {
  font-size: 0.8125rem;
  margin-bottom: 0;
}

.blog-preview-right .blog-card-footer {
  margin-top: 12px;
  padding-top: 10px;
  font-size: 0.75rem;
}

/* Blog Preview Grid — 2×2 cards, all horizontal */
@media (min-width: 768px) {
  .blog-preview-flex {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .blog-preview-left,
  .blog-preview-right {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .blog-preview-left .blog-card,
  .blog-preview-right .blog-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    height: 100%;
    overflow: hidden;
  }
  .blog-preview-left .blog-card-img,
  .blog-preview-right .blog-card-img {
    height: 100%;
    min-height: 150px;
    object-fit: cover;
  }
  .blog-preview-left .blog-card-body,
  .blog-preview-right .blog-card-body {
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}@media (min-width: 1024px) {
  .blog-preview-left .blog-card-img,
  .blog-preview-right .blog-card-img {
    min-height: 170px;
  }
}
@media (min-width: 1200px) {
  .blog-preview-left .blog-card-img,
  .blog-preview-right .blog-card-img {
    min-height: 190px;
  }
}

@media (min-width: 1200px) {
  .blog-preview-left .blog-card-img {
    height: 220px;
  }
  .blog-preview-right .blog-card-img {
    height: 220px;
  }
}

/* Mobile: stack vertically, featured card full width */
@media (max-width: 768px) {
  .blog-preview-left .blog-card {
    grid-template-columns: 1fr !important;
    display: flex !important;
    flex-direction: column !important;
  }
  .blog-preview-left .blog-card-img {
    min-height: 180px !important;
    height: 180px !important;
  }
}

@media (max-width: 1024px) {
  .blog-layout { grid-template-columns: 1fr; }
  .blog-sidebar { position: static; }
}

@media (max-width: 768px) {
  .blog-grid { grid-template-columns: 1fr; }
  .blog-nav { flex-direction: column; }
  .blog-cta { padding: 32px 24px; }
}