:root {
  --paper: #fff;
  --ink: #243a30;
  --muted: #59635e;
  --line: #dfe5e1;
  --soft: #f4f6f4;
  --serif: Georgia, 'Times New Roman', serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 Arial, Helvetica, sans-serif; }
button, input { font: inherit; }
a { color: inherit; text-underline-offset: 4px; }
button, a, input { touch-action: manipulation; }
button { cursor: pointer; }
button, input { color: var(--ink); }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid #36745a; outline-offset: 4px; }
[hidden] { display: none !important; }
.site-header, main, footer { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.wordmark { font: 26px/1.2 var(--serif); text-decoration: none; }
.site-header > a:last-child { font-size: 14px; }
.author-intro { display: flex; align-items: center; gap: 28px; padding: 32px 0; }
.author-intro > div { max-width: 620px; min-width: 0; }
h1 { font: 38px/1.2 var(--serif); margin: 0 0 12px; text-wrap: balance; }
.author-intro p { margin: 0; color: var(--muted); }
.collection { padding: 12px 0 48px; }
h2 { font-size: 20px; font-weight: 500; margin: 0 0 16px; }
.subject-groups { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.subject-groups button { border: 1px solid var(--line); border-radius: 5px; background: var(--paper); padding: 9px 13px; font-size: 14px; min-height: 44px; }
.subject-groups button:hover { background: var(--soft); border-color: #a5b4aa; }
.subject-groups button.active { background: var(--ink); color: white; border-color: var(--ink); }
.subject-groups span { margin-left: 5px; font-size: 12px; font-variant-numeric: tabular-nums; }
.catalog-controls { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 0 18px; border-bottom: 1px solid var(--line); }
.status-tabs { display: flex; flex-wrap: wrap; gap: 16px; }
.status-tabs button { border: 0; border-bottom: 2px solid transparent; padding: 8px 0; background: none; font-size: 14px; color: var(--muted); min-height: 44px; }
.status-tabs button:hover { color: var(--ink); }
.status-tabs button.active { border-color: var(--ink); color: var(--ink); font-weight: 600; }
.status-tabs span { font-size: 12px; font-weight: normal; margin-left: 4px; }
.search { width: min(320px, 42%); }
.search input { display: block; width: 100%; min-width: 0; padding: 10px 12px; border: 1px solid var(--line); background: var(--paper); border-radius: 5px; font-size: 16px; }
.search:focus-within { border-radius: 5px; }
.group-heading { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px; margin: 24px 0 6px; }
.group-heading h3 { font: 27px/1.3 var(--serif); margin: 0; }
.group-heading p { font-size: 14px; color: var(--muted); margin: 0; }
#clear { margin-left: auto; border: 0; background: none; padding: 8px 0; font-size: 14px; text-decoration: underline; }
.amazon-note { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.book-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px 24px; }
.book-card { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; content-visibility: auto; contain-intrinsic-size: auto 430px; }
.book-art { display: flex; justify-content: center; align-items: center; width: 100%; aspect-ratio: 4/5; background: var(--soft); padding: 16px; border-radius: 4px; text-decoration: none; }
.book-art:hover { outline: 1px solid #a5b4aa; outline-offset: 2px; }
.book-art img { display: block; width: 100%; height: 100%; min-height: 0; object-fit: contain; }
.book-meta { font-size: 12px; margin: 12px 0 6px; color: var(--muted); }
.book-meta .progress { color: #895121; }
.book-card h4 { font-size: 16px; font-weight: 500; line-height: 1.5; margin: 0 0 8px; overflow-wrap: anywhere; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.details-link { border: 0; background: none; color: var(--ink); text-decoration: underline; text-underline-offset: 4px; padding: 8px 0; font-size: 14px; }
.book-card > .details-link { margin-top: auto; }
.details-link:hover { color: #36745a; }
.cover-type { display: flex; flex-direction: column; justify-content: space-between; gap: 12px; width: 100%; height: 100%; border: 1px solid var(--line); padding: 14px; background: white; font: 20px/1.3 var(--serif); overflow: hidden; }
.cover-type small, .cover-type em { font: normal 12px/1.4 Arial, Helvetica, sans-serif; color: var(--muted); }
.cover-type > span { overflow: hidden; display: -webkit-box; -webkit-line-clamp: 5; -webkit-box-orient: vertical; }
.more-row { text-align: center; margin-top: 32px; }
.more-row:has(button[hidden]) { display: none; }
.primary { display: inline-flex; align-items: center; justify-content: center; gap: 16px; border: 1px solid var(--ink); background: var(--ink); color: white; border-radius: 5px; padding: 11px 18px; font-size: 14px; text-decoration: none; }
.primary:hover { background: #375846; }
.empty, .error { padding: 32px 16px; text-align: center; }
.empty h3 { font: 26px var(--serif); }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding: 24px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
footer p { margin: 0; }
dialog { width: min(860px, calc(100% - 32px)); max-height: 90dvh; padding: 44px 32px 32px; border: 1px solid var(--line); border-radius: 8px; background: white; color: var(--ink); overscroll-behavior: contain; }
dialog::backdrop { background: #17231ba6; }
.close { position: absolute; top: 6px; right: 8px; width: 44px; height: 44px; border: 0; background: white; font-size: 28px; }
.detail-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 28px; }
.detail-cover { display: block; width: 100%; height: auto; max-height: 310px; object-fit: contain; }
.detail-layout .cover-type { height: 280px; }
.detail-layout h2 { font: 28px/1.25 var(--serif); overflow-wrap: anywhere; }
.eyebrow { font-size: 14px; color: var(--muted); margin: 0 0 12px; }
.detail-subtitle, .detail-description { font-size: 16px; overflow-wrap: anywhere; }
.detail-subtitle, .detail-note { color: var(--muted); }
.detail-facts { display: flex; flex-wrap: wrap; gap: 6px 16px; padding: 12px 0; border-block: 1px solid var(--line); font-size: 14px; }
.detail-note { font-size: 14px; }
#copy-result { margin-left: 8px; }
.sr-only, .skip { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip:focus { width: auto; height: auto; clip: auto; padding: 12px; background: white; z-index: 100; }
@media (max-width: 900px) {
  .book-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 650px) {
  .site-header, main, footer { width: calc(100% - 32px); }
  .site-header { padding: 18px 0; }
  .wordmark { font-size: 24px; }
  .author-intro { gap: 16px; padding: 24px 0; align-items: flex-start; }
  h1 { font-size: 27px; }
  .author-intro p { font-size: 16px; }
  .catalog-controls { align-items: stretch; flex-direction: column; gap: 12px; }
  .search { width: 100%; }
  .status-tabs { gap: 20px; }
  .subject-groups { gap: 6px; }
  .subject-groups button { padding: 8px 10px; }
  .book-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 16px; }
  .book-art { padding: 10px; }
  .cover-type { padding: 10px; font-size: 17px; }
  .detail-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .detail-cover { width: auto; max-width: 100%; max-height: 240px; margin: auto; }
  .detail-layout .cover-type { width: 180px; height: 240px; margin: auto; }
  dialog { padding: 44px 20px 24px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.newsletter { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 32px 0; border-top: 1px solid var(--line); }
.newsletter h2 { font: 27px/1.3 var(--serif); margin-bottom: 8px; }
.newsletter p { color: var(--muted); margin: 0; }
.newsletter-form label { display: block; margin-bottom: 6px; font-size: 14px; }
.newsletter-fields { display: flex; gap: 8px; }
.newsletter-fields input { width: 100%; min-width: 0; border: 1px solid var(--line); border-radius: 5px; padding: 10px 12px; }
.newsletter-form .newsletter-note { font-size: 12px; margin-top: 10px; }
@media (max-width: 650px) {
  .newsletter { grid-template-columns: 1fr; }
  .newsletter-fields { flex-wrap: wrap; }
  .newsletter-fields input { flex: 1 1 180px; }
}

#signup-link { margin-top: 12px; }