.book-rich-content {
  display: block;
  height: auto;
  min-height: 0;
  overflow: visible;
  color: #172033;
  line-height: 1.7;
  margin: 0 0 16px;
}
.book-rich-content p { margin: 0 0 10px; }
.book-rich-content ul,
.book-rich-content ol { padding-left: 24px; margin-bottom: 12px; }
.book-stock { margin: 12px 0; color: #187348; }
.product-tabs {
  grid-column: 1 / -1;
  border-top: 1px solid #e1e6ee;
  margin-top: 8px;
  padding-top: 24px;
}
.product-tab-list {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid #d8dee8;
  overflow-x: auto;
}
.product-tab {
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: #5c677a;
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
  padding: 12px 18px;
  white-space: nowrap;
}
.product-tab:hover { color: #173d7a; }
.product-tab.active {
  border-bottom-color: #f2a900;
  color: #173d7a;
}
.product-tab-panel { padding: 24px 8px 4px; }
.product-tab-panel[hidden] { display: none; }
.product-tab-panel .book-rich-content { margin-bottom: 0; }
@media (max-width: 520px) {
  .product-tab { font-size: 15px; padding: 11px 12px; }
  .product-tab-panel { padding: 18px 2px 2px; }
}