/* ═══════════════════════════════════════════════════════════
   PRIMELINK – สาระน่ารู้ (Knowledge Hub) – PAGE CSS
   knowledge-articles.css
═══════════════════════════════════════════════════════════ */

/* ── PAGE HERO ── */
.kb-hero {
  background: linear-gradient(135deg, #111111 0%, #1B1B1B 60%, #2a2010 100%);
  padding: 120px 0 56px;
  position: relative;
  overflow: hidden;
}

.kb-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(215,166,92,0.12) 0%, transparent 70%);
}

.kb-hero-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(215,166,92,0.1);
  border: 1px solid rgba(215,166,92,0.22);
  border-radius: 50px;
  padding: 6px 16px;
  margin-bottom: 18px;
}

.kb-hero-title {
  font-family: 'Prompt', sans-serif;
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.25;
  margin-bottom: 14px;
}

.kb-hero-title span { color: var(--gold); }

.kb-hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ── HERO SEARCH ── */
.kb-search-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 540px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 14px;
  padding: 8px 8px 8px 18px;
  transition: var(--transition);
}

.kb-search-wrap:focus-within {
  border-color: rgba(215,166,92,0.5);
  background: rgba(255,255,255,0.1);
}

.kb-search-wrap input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.92rem;
  color: #fff;
}

.kb-search-wrap input::-moz-placeholder { color: rgba(255,255,255,0.38); }

.kb-search-wrap input::placeholder { color: rgba(255,255,255,0.38); }

.kb-search-btn {
  flex-shrink: 0;
  padding: 10px 20px;
  background: var(--gold);
  color: var(--dark);
  border: none;
  border-radius: 10px;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.kb-search-btn:hover { background: var(--gold-dark); }

/* ── HERO STATS ── */
.kb-hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.kb-stat {
  text-align: left;
}

.kb-stat-num {
  display: block;
  font-family: 'Prompt', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.kb-stat-label {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
  margin-top: 3px;
  display: block;
}

.kb-stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,0.1);
}

/* ═══════════════════════════════════════════════════════════
   STICKY CATEGORY BAR
═══════════════════════════════════════════════════════════ */
.kb-cat-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 68px;
  z-index: 90;
}

.kb-cat-inner {
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 0 4px;
}

.kb-cat-inner::-webkit-scrollbar { display: none; }

.kb-cat-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 16px 18px;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.87rem;
  font-weight: 500;
  color: var(--text-muted);
  background: none;
  border: none;
  border-bottom: 2.5px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  text-decoration: none !important;
}

.kb-cat-btn i { font-size: 1rem; }

.kb-cat-btn:hover {
  color: var(--text);
}

.kb-cat-btn.active {
  color: var(--gold-dark);
  border-bottom-color: var(--gold);
  font-weight: 600;
}

.kb-cat-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 18px;
  background: var(--bg-light);
  border-radius: 50px;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 0 5px;
  transition: var(--transition);
}

.kb-cat-btn.active .kb-cat-count {
  background: rgba(215,166,92,0.15);
  color: var(--gold-dark);
}

/* ═══════════════════════════════════════════════════════════
   MAIN CONTENT LAYOUT
═══════════════════════════════════════════════════════════ */
.kb-main {
  padding: 48px 0 64px;
  background: #f8f8f8;
}

.kb-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: start;
}

@media (max-width: 991px) {
  .kb-layout {
    grid-template-columns: 1fr;
  }
  .kb-sidebar { order: -1; }
}

/* ═══════════════════════════════════════════════════════════
   SORT BAR
═══════════════════════════════════════════════════════════ */
.kb-sort-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.kb-result-count {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.kb-result-count strong {
  color: var(--text);
  font-weight: 700;
}

.kb-sort-select {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.kb-sort-select select {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.84rem;
  color: var(--text);
  background: #fff;
  cursor: pointer;
  outline: none;
}

/* ═══════════════════════════════════════════════════════════
   FEATURED ARTICLE (HERO CARD – TOP)
═══════════════════════════════════════════════════════════ */
.kb-featured {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 28px;
  min-height: 320px;
  text-decoration: none;
  transition: var(--transition);
}

.kb-featured:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.kb-featured-img {
  position: relative;
  overflow: hidden;
}

.kb-featured-img img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  transition: transform 0.5s ease;
}

.kb-featured:hover .kb-featured-img img {
  transform: scale(1.04);
}

.kb-featured-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0,0,0,0.15), transparent);
}

.kb-featured-body {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.kb-featured-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--gold-dark);
  background: rgba(215,166,92,0.12);
  border: 1px solid rgba(215,166,92,0.2);
  border-radius: 6px;
  padding: 4px 10px;
  margin-bottom: 14px;
  width: -moz-fit-content;
  width: fit-content;
}

.kb-featured-title {
  font-family: 'Prompt', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.4;
  margin-bottom: 12px;
}

.kb-featured-excerpt {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-featured-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.kb-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.kb-meta-item i { font-size: 0.82rem; }

.kb-featured-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

@media (max-width: 767px) {
  .kb-featured {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .kb-featured-img {
    height: 200px;
  }
  .kb-featured-body {
    padding: 22px 20px;
  }
  .kb-featured-title { font-size: 1.1rem; }
}

/* ═══════════════════════════════════════════════════════════
   ARTICLE GRID
═══════════════════════════════════════════════════════════ */
.kb-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

@media (max-width: 575px) {
  .kb-grid {
    grid-template-columns: 1fr;
  }
}

/* ── ARTICLE CARD ── */
.kb-card {
  background: #fff;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  border: 1px solid transparent;
}

.kb-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(215,166,92,0.15);
}

.kb-card-img {
  position: relative;
  height: 185px;
  overflow: hidden;
  flex-shrink: 0;
}

.kb-card-img img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
  transition: transform 0.5s ease;
}

.kb-card:hover .kb-card-img img { transform: scale(1.05); }

.kb-card-badges {
  position: absolute;
  top: 10px;
  left: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.kb-card-body {
  padding: 18px 18px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.kb-card-title {
  font-family: 'Prompt', sans-serif;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--dark);
  line-height: 1.45;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-card-excerpt {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.kb-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin-top: auto;
}

.kb-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.kb-card-readmore {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gold-dark);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 3px;
}

/* ── LIST CARD (alternative layout) ── */
.kb-card--list {
  flex-direction: row;
  height: 130px;
}

.kb-card--list .kb-card-img {
  width: 160px;
  height: 100%;
  flex-shrink: 0;
}

.kb-card--list .kb-card-body {
  padding: 14px 16px;
}

.kb-card--list .kb-card-title {
  font-size: 0.9rem;
  -webkit-line-clamp: 2;
}

.kb-card--list .kb-card-excerpt { display: none; }

/* ═══════════════════════════════════════════════════════════
   BADGES / TAGS
═══════════════════════════════════════════════════════════ */
.kb-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: 6px;
  padding: 3px 8px;
  white-space: nowrap;
}

.kb-badge--article {
  background: rgba(59,130,246,0.1);
  color: #2563eb;
}

.kb-badge--data {
  background: rgba(16,185,129,0.1);
  color: #059669;
}

.kb-badge--news {
  background: rgba(239,68,68,0.1);
  color: #dc2626;
}

.kb-badge--review {
  background: rgba(168,85,247,0.1);
  color: #7c3aed;
}

.kb-badge--hot {
  background: linear-gradient(135deg, #ff6b35, #e74c3c);
  color: #fff;
}

.kb-badge--new {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #fff;
}

.kb-tag {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-light);
  border-radius: 4px;
  padding: 2px 7px;
  transition: var(--transition);
}

.kb-tag:hover {
  background: rgba(215,166,92,0.12);
  color: var(--gold-dark);
}

/* ═══════════════════════════════════════════════════════════
   PAGINATION
═══════════════════════════════════════════════════════════ */
.kb-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 32px;
}

.kb-page-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kb-page-btn:hover { border-color: var(--gold); color: var(--gold-dark); }

.kb-page-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--dark);
  font-weight: 700;
}

.kb-page-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ═══════════════════════════════════════════════════════════
   SIDEBAR
═══════════════════════════════════════════════════════════ */
.kb-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.kb-widget {
  background: #fff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.kb-widget-head {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 9px;
}

.kb-widget-head i {
  font-size: 1.05rem;
  color: var(--gold-dark);
}

.kb-widget-head h6 {
  font-family: 'Prompt', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--dark);
  margin: 0;
}

/* Popular articles */
.kb-popular-list {
  padding: 12px 16px;
  list-style: none;
  margin: 0;
}

.kb-popular-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

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

.kb-popular-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--bg-light);
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.kb-popular-item:nth-child(1) .kb-popular-num { background: var(--gold); color: var(--dark); }
.kb-popular-item:nth-child(2) .kb-popular-num { background: #d1d5db; color: var(--dark); }
.kb-popular-item:nth-child(3) .kb-popular-num { background: #d97706; color: #fff; }

.kb-popular-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-popular-item:hover .kb-popular-title { color: var(--gold-dark); }

.kb-popular-meta {
  font-size: 0.7rem;
  color: var(--text-light);
  margin-top: 3px;
}

/* Tags cloud */
.kb-tag-cloud {
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.kb-tag-cloud-item {
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-light);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.kb-tag-cloud-item:hover, .kb-tag-cloud-item.active {
  background: rgba(215,166,92,0.15);
  color: var(--gold-dark);
}

/* Newsletter widget */
.kb-newsletter {
  padding: 20px;
}

.kb-newsletter-img {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 14px;
}

.kb-newsletter h6 {
  font-family: 'Prompt', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}

.kb-newsletter p {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.kb-newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kb-newsletter-form input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.84rem;
  color: var(--text);
  outline: none;
  transition: var(--transition);
}

.kb-newsletter-form input:focus { border-color: var(--gold); }

.kb-newsletter-form button {
  width: 100%;
  padding: 11px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--dark);
  border: none;
  border-radius: 10px;
  font-family: 'IBM Plex Sans Thai', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.kb-newsletter-form button:hover { box-shadow: var(--shadow-gold); }

/* ═══════════════════════════════════════════════════════════
   SPONSOR BANNER (non-intrusive – bottom of content)
═══════════════════════════════════════════════════════════ */
.kb-sponsor-strip {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
  text-decoration: none;
  transition: var(--transition);
}

.kb-sponsor-strip:hover {
  border-color: rgba(215,166,92,0.3);
  box-shadow: var(--shadow-sm);
}

.kb-sponsor-label {
  flex-shrink: 0;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-light);
  background: var(--bg-light);
  border-radius: 4px;
  padding: 3px 7px;
}

.kb-sponsor-content {
  flex: 1;
}

.kb-sponsor-content h6 {
  font-family: 'Prompt', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--dark);
  margin: 0 0 2px;
}

.kb-sponsor-content p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
}

.kb-sponsor-cta {
  flex-shrink: 0;
  padding: 8px 16px;
  background: var(--gold);
  color: var(--dark);
  border-radius: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

/* ── HIDE ARTICLE CARDS ── */
.kb-card[data-hidden] { display: none; }

/* ── EMPTY STATE ── */
.kb-empty {
  text-align: center;
  padding: 60px 20px;
  display: none;
}

.kb-empty i {
  font-size: 3rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.kb-empty p { color: var(--text-muted); }

/* ── VIEW TOGGLE ── */
.kb-view-toggle {
  display: flex;
  gap: 4px;
}

.kb-view-btn {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.kb-view-btn.active, .kb-view-btn:hover {
  background: var(--gold-pale);
  border-color: var(--gold);
  color: var(--gold-dark);
}

/* ─── RESPONSIVE SIDEBAR ─── */
@media (max-width: 991px) {
  .kb-sidebar {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 575px) {
  .kb-sidebar {
    grid-template-columns: 1fr;
  }
  .kb-cat-btn {
    padding: 14px 13px;
    font-size: 0.82rem;
  }
}