/* Tabs and related items sit inside <main class="pdp">, which already pads the
   sides; padding them again pushed them ~24px in from the gallery edge. */
.pdp-tabs {
  max-width: var(--container-max);
  margin-inline: auto;
  margin-top: var(--space-10);
}
.pdp-related.section { padding-inline: 0; }

.pdp-tabs__nav {
  position: sticky;
  top: var(--header-tier2-h);
  z-index: 30;
  display: flex;
  gap: var(--space-6);
  overflow-x: auto;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.pdp-tabs__btn {
  padding: var(--space-4) 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s var(--ease-standard), border-color 0.15s var(--ease-standard);
}
.pdp-tabs__btn:hover { color: var(--color-navy); }
.pdp-tabs__btn.is-active { color: var(--color-primary); border-bottom-color: var(--color-primary); }

.pdp-tabs__panel { padding-block: var(--space-6); max-width: 78ch; }
.pdp-tabs__panel[hidden] { display: none; }

.pdp-tabs__rich-text p { margin-bottom: var(--space-3); line-height: 1.7; }
.pdp-tabs__rich-text .pdp-callout {
  background: var(--color-primary-tint);
  color: var(--color-navy);
  border: 1px solid color-mix(in srgb, var(--color-primary) 22%, transparent);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
}
.pdp-tabs__subhead { font-size: 1rem; font-weight: 700; margin: var(--space-2) 0 var(--space-3); }
.pdp-tabs__subhead:not(:first-child) { margin-top: var(--space-6); }
.pdp-tabs__empty { color: var(--color-text-muted); margin-bottom: var(--space-3); }
.pdp-tabs__link { color: var(--color-primary); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }
.pdp-tabs__link:hover { color: var(--color-primary-hover); }
.pdp-tabs__more { margin-top: var(--space-5); font-size: 0.9375rem; }

/* Specifications: strict two-column tables */
.pdp-spec-table { width: 100%; border-collapse: collapse; border: 1px solid var(--color-border); border-radius: var(--radius-sm); overflow: hidden; }
.pdp-spec-table th, .pdp-spec-table td { padding: var(--space-3) var(--space-4); text-align: left; font-size: 0.875rem; border-bottom: 1px solid var(--color-border); vertical-align: top; }
.pdp-spec-table tr:last-child th, .pdp-spec-table tr:last-child td { border-bottom: none; }
.pdp-spec-table th { background: var(--color-section-tint); font-weight: 600; width: 42%; color: var(--color-navy); }

/* Documents */
.pdp-doc {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color 0.15s var(--ease-standard), box-shadow 0.15s var(--ease-standard);
}
.pdp-doc:hover { border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.pdp-doc > svg { width: 36px; height: 36px; flex-shrink: 0; color: var(--color-primary); }
.pdp-doc strong { display: block; color: var(--color-navy); }
.pdp-doc span > span { font-size: 0.8125rem; color: var(--color-text-muted); }

/* Similar items */
.pdp-related { padding-top: var(--space-10); }
.pdp-related__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(244px, 1fr)); gap: var(--space-4); }
.pdp-related__grid .product-card { flex: none; width: auto; }
/* four related items fill four columns, not five-with-a-gap */
@media (min-width: 1100px) { .pdp-related__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

@media (max-width: 767px) {
  .pdp-tabs__nav { gap: var(--space-5); }
  .pdp-spec-table th { width: 46%; }
}