/* ===== Product Detail Page ===== */

/* Header reuses sr-header from search-results.css */
.pd-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.pd-main {
  max-width: 72rem; margin: 0 auto;
  padding: 4.75rem 1.5rem 4rem;
}

/* Breadcrumb */
.pd-breadcrumb {
  font-size: 0.75rem; color: var(--muted-fg); margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: 0.375rem; flex-wrap: wrap;
}
.pd-breadcrumb a { transition: color 0.15s; }
.pd-breadcrumb a:hover { color: var(--primary); }
.pd-bc-sep { color: var(--border); }

/* Layout */
.pd-layout {
  display: grid; grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 768px) {
  .pd-layout { grid-template-columns: 1fr 18rem; }
}
@media (min-width: 1024px) {
  .pd-layout { grid-template-columns: 1fr 20rem; }
}

/* Product Info */
.pd-product-name {
  font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 0.375rem;
}
@media (min-width: 640px) { .pd-product-name { font-size: 2rem; } }

.pd-mfr-line {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 0.375rem;
}
.pd-mfr { font-size: 0.875rem; color: var(--muted-fg); }
.pd-verified-badge {
  display: inline-flex; align-items: center; gap: 0.25rem;
  font-size: 0.6875rem; font-weight: 600; color: var(--primary);
  padding: 0.125rem 0.5rem; background: var(--secondary);
  border-radius: 0.25rem;
}

.pd-meta-line {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 0.8125rem; color: var(--muted-fg);
  margin-bottom: 1.5rem;
}
.pd-form {
  padding: 0.125rem 0.5rem;
  background: var(--muted); border-radius: 0.25rem;
  font-size: 0.75rem; font-weight: 500;
}

/* Tabs */
.pd-tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.pd-tab {
  padding: 0.625rem 1rem; font-size: 0.8125rem; font-weight: 500;
  color: var(--muted-fg); border-bottom: 2px solid transparent;
  transition: all 0.15s; white-space: nowrap; flex-shrink: 0;
}
.pd-tab:hover { color: var(--fg); }
.pd-tab.active {
  color: var(--primary); border-bottom-color: var(--primary);
}

/* Tab Content */
.pd-tab-content { display: none; }
.pd-tab-content.active { display: block; }

.pd-tab-text p {
  font-size: 0.875rem; line-height: 1.7; color: var(--fg);
  margin-bottom: 0.875rem;
}
.pd-tab-text strong { font-weight: 600; }
.pd-tab-text ul {
  margin: 0.5rem 0 1rem 1.25rem; font-size: 0.875rem;
  line-height: 1.7;
}

/* Composition Table */
.pd-comp-table-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 1rem;
}
.pd-comp-table {
  width: 100%; border-collapse: collapse; font-size: 0.8125rem;
}
.pd-comp-table thead { background: var(--muted); }
.pd-comp-table th {
  padding: 0.75rem 1rem; text-align: left;
  font-size: 0.6875rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.04em; color: var(--muted-fg);
  border-bottom: 1px solid var(--border);
}
.pd-comp-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid hsla(210, 15%, 90%, 0.5);
}
.pd-comp-table tbody tr:last-child td { border-bottom: none; }
.pd-comp-summary {
  font-size: 0.8125rem; color: var(--muted-fg); line-height: 1.6;
  margin-top: 0.5rem;
}

/* Reviews */
.pd-reviews-note {
  font-size: 0.75rem; color: var(--muted-fg); margin-bottom: 1rem;
  font-style: italic;
}
.pd-review-item {
  padding: 1rem 0; border-bottom: 1px solid var(--border);
}
.pd-review-item:last-child { border-bottom: none; }
.pd-review-author {
  font-size: 0.8125rem; font-weight: 600; margin-bottom: 0.25rem;
}
.pd-review-date {
  font-size: 0.6875rem; color: var(--muted-fg); margin-bottom: 0.5rem;
}
.pd-review-text {
  font-size: 0.8125rem; line-height: 1.6;
}

/* Similar Medicines */
.pd-similar-section { margin-top: 2.5rem; }
.pd-similar-heading {
  font-size: 1.125rem; font-weight: 700; margin-bottom: 0.375rem;
}
.pd-similar-note {
  font-size: 0.75rem; color: var(--muted-fg); margin-bottom: 1.25rem;
  line-height: 1.5;
}
.pd-similar-grid {
  display: grid; grid-template-columns: 1fr; gap: 0.75rem;
}
@media (min-width: 480px) { .pd-similar-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px) { .pd-similar-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .pd-similar-grid { grid-template-columns: repeat(4, 1fr); } }

.pd-similar-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem;
  transition: all 0.2s;
}
.pd-similar-card:hover {
  border-color: hsla(174, 55%, 40%, 0.35);
  box-shadow: 0 4px 16px -4px hsla(174, 40%, 80%, 0.3);
  transform: translateY(-1px);
}
.pd-sim-name { font-size: 0.875rem; font-weight: 600; margin-bottom: 0.25rem; }
.pd-sim-mfr { font-size: 0.75rem; color: var(--muted-fg); margin-bottom: 0.25rem; }
.pd-sim-salt { font-size: 0.6875rem; color: var(--muted-fg); margin-bottom: 0.5rem; }
.pd-sim-price { font-size: 0.8125rem; font-weight: 500; margin-bottom: 0.625rem; }
.pd-sim-view-btn {
  font-size: 0.6875rem; font-weight: 500; color: var(--primary);
  padding: 0.3125rem 0.75rem; border: 1px solid hsla(174, 55%, 40%, 0.3);
  border-radius: 0.375rem; transition: all 0.15s; display: inline-block;
}
.pd-sim-view-btn:hover { background: var(--secondary); }

/* Right Column */
.pd-side-col { align-self: start; }
@media (min-width: 768px) {
  .pd-side-col { position: sticky; top: 5rem; }
}

/* Product Image */
.pd-image-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  margin-bottom: 1rem;
}
.pd-image-card.hidden { display: none; }
.pd-image-card img {
  width: 100%; height: auto; display: block;
}

/* Price Card */
.pd-price-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  margin-bottom: 1rem;
}
.pd-price-row {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 0.375rem;
}
.pd-price-label {
  font-size: 0.75rem; color: var(--muted-fg); font-weight: 400;
}
.pd-price-value {
  font-size: 1.25rem; font-weight: 700;
}
.pd-price-pack {
  font-size: 0.75rem; color: var(--muted-fg); text-align: right;
}

/* Action Buttons */
.pd-actions {
  display: flex; flex-direction: column; gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.pd-action-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.5rem;
  width: 100%; padding: 0.75rem 1rem;
  font-size: 0.8125rem; font-weight: 600;
  border-radius: var(--radius); transition: all 0.15s;
}
.pd-action-primary {
  background: var(--primary); color: var(--primary-fg);
}
.pd-action-primary:hover { opacity: 0.9; }
.pd-action-secondary {
  background: var(--card); color: var(--fg);
  border: 1px solid var(--border);
}
.pd-action-secondary:hover { background: var(--muted); }

/* Ad Banners */
.pd-ad-banner {
  margin-top: 2rem; padding: 1.25rem 1.5rem;
  background: hsla(210, 15%, 97%, 0.7);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.pd-ad-label {
  display: inline-block;
  font-size: 0.5625rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--muted-fg);
  margin-bottom: 0.5rem;
}
.pd-ad-content {}
.pd-ad-title {
  font-size: 0.8125rem; font-weight: 600; margin-bottom: 0.25rem;
}
.pd-ad-text {
  font-size: 0.75rem; color: var(--muted-fg); line-height: 1.5;
}

/* Sidebar Ad */
.pd-ad-sidebar {
  padding: 1.25rem;
  background: hsla(210, 15%, 97%, 0.7);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}
.pd-ad-sidebar-content { text-align: center; }
.pd-ad-s-icon {
  width: 2.5rem; height: 2.5rem; border-radius: 0.5rem;
  background: var(--secondary); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin: 0.75rem auto 0.625rem;
}
.pd-ad-s-title {
  font-size: 0.8125rem; font-weight: 600; margin-bottom: 0.25rem;
}
.pd-ad-s-text {
  font-size: 0.6875rem; color: var(--muted-fg); line-height: 1.5;
  margin-bottom: 0.75rem;
}
.pd-ad-s-cta {
  font-size: 0.6875rem; font-weight: 500; color: var(--primary);
  transition: opacity 0.15s;
}
.pd-ad-s-cta:hover { opacity: 0.8; }