.catalog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 15px; }
.catalog-grid .catalog-item { grid-template-columns: 95px minmax(0, 1fr); gap: 14px; padding: 14px; align-items: start; }
.theme-english { --book-tint: #e8efe4; }
.theme-math { --book-tint: #e4edf7; }
.theme-science { --book-tint: #f8ecdb; }
.catalog-grid .catalog-cover { background: var(--book-tint); padding: 9px; }
.catalog-grid .catalog-cover img { width: 100%; }
.catalog-grid .catalog-copy { align-self: start; padding: 1px 0 0; }
.catalog-grid .catalog-meta { color: var(--muted); font-size: 11px; font-weight: 700; margin: 0; }
.catalog-grid .catalog-copy h3 { font-size: clamp(1.2rem, 2vw, 1.55rem); margin: 4px 0 6px; }
.catalog-grid .catalog-copy h3 a:hover { text-decoration: underline; text-underline-offset: 3px; }
.catalog-grid .catalog-copy p:not(.catalog-meta) { font-size: 12px; line-height: 1.55; }
.catalog-grid .catalog-copy .card-price { color: var(--ink); margin-top: 8px; }
.card-price strong, .product-price strong { font-size: 1.22em; font-weight: 700; }
.card-price small, .product-price small { font-size: .79em; }
.card-actions { grid-column: 1/-1; align-self: end; gap: 8px 12px; margin: 0; }
.card-actions .button { padding-inline: 12px; }
.card-actions .text-button { padding-inline: 1px; }
.filter-reset { border: 0; color: var(--accent); background: transparent; min-height: 44px; font-size: 12px; text-decoration: underline; text-underline-offset: 3px; }
.book-scene .scene-orbit { background: var(--book-tint, var(--peach)); }
.product-scene { max-width: 100%; }
.product-price { margin-bottom: 13px; color: var(--ink); font-weight: 700; }
.dialogue-lines { display: grid; gap: 8px; margin-top: 9px; }
.dialogue-lines p { display: flex; align-items: baseline; gap: 9px; margin: 0; padding: 9px 10px; border-radius: 8px; background: var(--sand); font-size: clamp(14px, 1.65vw, 16px); }
.dialogue-lines strong { flex: none; color: var(--accent); }
.dialogue-lines p:last-child { background: var(--leaf); }
.dialogue-lines p:last-child strong { color: var(--leaf-ink); }
.sample-scope br { display: initial; }
.sample-lesson { margin-top: 15px; }
.sample-note { margin-top: 8px; }
.sample-downloads { margin-top: 15px; }
.sample-buy-link { display: inline-flex; min-height: 44px; align-items: center; gap: 6px; margin-top: 5px; color: var(--accent); font-size: 14px; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.pager-top { padding-block: 5px 9px; }
.reader-heading { scroll-margin-top: 88px; }
.toc-chapters { display: grid; gap: 8px; margin-top: 18px; }
.toc-chapter { overflow: hidden; border: 1px solid var(--rule); border-radius: 11px; }
.toc-chapter summary { padding: 11px 14px; background: var(--sand); color: var(--ink); font-weight: 700; cursor: pointer; }
.toc-chapter table { width: 100%; border-collapse: collapse; table-layout: fixed; font-size: 13px; line-height: 1.5; }
.toc-chapter th, .toc-chapter td { padding: 7px 10px; border-top: 1px solid var(--rule); }
.toc-chapter th { font-weight: 400; text-align: left; }
.toc-chapter thead th { color: var(--ink); font-weight: 700; }
.toc-chapter thead th:first-child { width: 60%; }
.toc-chapter td, .toc-chapter thead th:not(:first-child) { text-align: center; }
.toc-chapter .toc-section { background: var(--leaf); color: var(--leaf-ink); }
.purchase-section { background: var(--sand); border-block: 1px solid var(--rule); }
.purchase-intro { margin-top: 9px; }
.purchase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-block: 17px; }
.buy-card { display: flex; flex-direction: column; align-items: start; gap: 9px; border: 1px solid var(--rule); border-radius: 14px; padding: clamp(15px, 3vw, 24px); }
.buy-card .eyebrow { margin: 0; }
.buy-card h3 { line-height: 1.5; }
.buy-card h3 span { white-space: nowrap; margin-left: .25em; }
.buy-card h3 small { color: var(--muted); font-size: .58em; }
.buy-card p:not(.eyebrow) { margin: 0; }
.buy-card .button { margin-top: auto; }
.buy-home { background: var(--white); }
.buy-pro { background: #f3f7fa; border-color: #dce6ec; }
.download-note { margin-top: 20px; padding: 15px; border: 1px solid var(--rule); border-radius: 12px; background: var(--white); font-size: 14px; }
.download-note h3 { margin-bottom: 7px; font-size: 17px; }
.download-note a { display: inline-block; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 1000px) {
  .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  .catalog-grid { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .catalog-grid .catalog-item { grid-template-columns: 88px minmax(0, 1fr); gap: 7px 12px; padding: 9px; border-radius: 12px; }
  .catalog-grid .catalog-cover { min-height: 103px; padding: 8px; }
  .catalog-grid .catalog-cover img { width: 61px; }
  .catalog-grid .catalog-copy h3 { font-size: 1.13rem; }
  .card-actions { margin-top: 0; gap: 5px 12px; }
  .card-actions .button { padding-inline: 8px; }
  .product-price { margin: 0 0 9px; }
  .reader-heading { scroll-margin-top: 105px; }
  .preview-art { height: clamp(91px, 25vw, 152px); }
  .toc-chapter table { font-size: 12px; }
  .toc-chapter th, .toc-chapter td { padding-inline: 5px; overflow-wrap: anywhere; }
  .toc-chapter thead th:first-child { width: 56%; }
  .purchase-grid { grid-template-columns: 1fr; gap: 9px; }
  .buy-card .button { width: 100%; }
}

.product-lede strong { display: inline; }

.sales-status {
  margin-top: 18px;
  padding: 12px 15px;
  border: 1px solid #dbe7d7;
  border-radius: 10px;
  background: #f4f8f2;
  font-size: 13px;
  line-height: 1.65;
}
.sales-status strong {
  display: inline-block;
  margin-right: 5px;
  color: var(--leaf-ink);
}
.sales-update { margin-top: 4px; color: var(--muted); font-size: 12px; }
.sales-update time { display: inline-block; margin-right: 8px; }
.sales-update a, .plan-note a, #plans .micro a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

.series-section h2 { font-size: clamp(1.52rem, 2.8vw, 2.1rem); }
.series-section .live-copy > p:not(.eyebrow) { margin-top: 13px; }
.series-section .dialogue-sample h3 { margin: 2px 0 8px 4px; font-size: 1.25rem; }
.study-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}
.study-flow li {
  display: grid;
  gap: 4px;
  padding: 13px 15px;
  border: 1px solid var(--rule);
  border-radius: 11px;
  font-size: 13px;
}
.study-flow strong { color: var(--ink); font-size: 15px; }

.plan-points { margin: 0; padding-left: 1.3em; font-size: 14px; }
.plan-points li + li { margin-top: 6px; }
.buy-card .plan-points + .button { margin-top: auto; }
.plan-note { color: var(--muted); font-size: 13px; }

@media (max-width: 680px) {
  .site-header nav { flex-wrap: wrap; gap: 4px clamp(8px, 3vw, 16px); }
  .site-header nav a { padding-block: 6px; }
  .study-flow { grid-template-columns: 1fr; gap: 7px; }
  .plan-points { font-size: 13px; }
}

@media (max-width: 355px) {
  .filters label { flex: 0 1 130px; min-width: 0; }
  .filters select { width: 100%; min-width: 0; }
}