/* =============================================
   TRAINING DATASETS PAGE
   ============================================= */

.featured-section { padding: 0 0 var(--section-pad); }

.featured-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.dataset-card {
  background: var(--poc-white);
  border: 1px solid var(--poc-warm-gray);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
  display: block;
  color: inherit;
}

.dataset-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.08);
  border-color: transparent;
}

.dataset-card .thumb {
  aspect-ratio: 3/4;
  overflow: hidden;
  position: relative;
}

.dataset-card .thumb .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  padding: 4px 10px;
  border-radius: 6px;
  color: var(--poc-teal);
}

.dataset-card .body {
  padding: 16px 18px 20px;
}

.dataset-card .body h3 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.dataset-card .body .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dataset-card .body .cat {
  font-size: 12px;
  color: var(--poc-mid-gray);
  font-weight: 500;
}

.dataset-card .body .count {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--poc-accent);
}

/* Browse section */
.browse-section {
  padding: var(--section-pad) 0;
  background: var(--poc-white);
}

.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--poc-warm-gray);
  background: transparent;
  color: var(--poc-dark-gray);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--poc-black);
  color: white;
  border-color: var(--poc-black);
}

.browse-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

/* Face samples strip */
.sample-strip {
  padding: 60px 0;
  background: var(--poc-white);
  border-top: 1px solid var(--poc-warm-gray);
  border-bottom: 1px solid var(--poc-warm-gray);
}

.sample-faces {
  display: flex;
  gap: 4px;
  justify-content: center;
  margin-top: 32px;
}

.sample-faces img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 8px;
  transition: transform 0.3s;
}

.sample-faces img:hover {
  transform: scale(1.1);
  z-index: 2;
  position: relative;
}

@media (max-width: 1024px) {
  .featured-grid, .browse-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .featured-grid, .browse-grid { grid-template-columns: 1fr; }
  .sample-faces img { width: 56px; height: 56px; }
}