/* Keep reading text and controls comfortable at every screen size. */
:root {
  --reading-size: 1.0625rem;
  --body-size: 1.125rem;
  --control-size: 1rem;
  --secondary-size: .875rem;
  --label-size: .75rem;
  --muted: #62665b;
}

body { font-size: var(--body-size); }
.header { gap: 20px; flex-wrap: wrap; }
.brand-name { font-size: 25px; }
.brand-name small { font-size: var(--label-size); letter-spacing: 1.3px; line-height: 1.5; }
.header nav { gap: 24px; font-size: var(--control-size); }
.header nav > a { display: inline-flex; align-items: center; min-height: 44px; }
.private, .header nav .private, footer .private { font-size: var(--secondary-size); color: #665f51; }
.private svg, .header nav .private svg { width: 16px; height: 16px; }
.header .private { padding: 7px 12px; white-space: nowrap; }

.eyebrow, .hero .eyebrow, .section-heading .eyebrow, .book-copy .eyebrow {
  font-size: var(--label-size);
  line-height: 1.6;
  letter-spacing: 1.6px;
}
.hero-description { font-size: var(--body-size); color: #626458; max-width: 420px; line-height: 1.8; }
.primary { font-size: var(--control-size); min-height: 48px; padding: 14px 22px; }
.hero-footnote { font-size: var(--secondary-size); color: #65665a; line-height: 1.7; }
.art-caption { font-size: var(--label-size); letter-spacing: .8px; gap: 8px 16px; flex-wrap: wrap; }
.section-heading { gap: 24px; }
.section-heading > p, .books .section-heading > p { font-size: var(--secondary-size); max-width: none; }

.tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; overflow: visible; }
.tabs button { min-height: 56px; font-size: var(--control-size); line-height: 1.4; gap: 8px; white-space: normal; }
.tabs button svg { width: 20px; height: 20px; }
.tab-count, .tabs .tab-count { font-size: var(--label-size); min-width: 24px; height: 23px; padding: 0 4px; }
.toolbar { display: grid; grid-template-columns: minmax(0, 1fr) minmax(220px, 290px) auto; gap: 12px; }
.search input { font-size: var(--control-size); min-height: 48px; }
.search input::placeholder { color: #6c6f65; opacity: 1; }
.search > svg { width: 20px; height: 20px; }
.search button { min-width: 44px; min-height: 44px; justify-content: center; }
.book-filter { min-width: 0; }
.book-filter select { max-width: none; width: 100%; min-width: 0; min-height: 48px; font-size: var(--control-size); padding: 10px 28px 10px 12px; }
.saved-filter { font-size: var(--control-size); min-height: 48px; justify-content: center; }
.saved-filter svg { width: 18px; height: 18px; }
.results-info { font-size: var(--secondary-size); color: #62665b; gap: 12px; flex-wrap: wrap; }
.results-info > span { font-size: var(--secondary-size); }
.category-intro { font-size: var(--reading-size); line-height: 1.8; color: #62665b; max-width: 850px; }

.cards { gap: 20px; }
.card { padding: 25px 24px 20px; min-width: 0; }
.card-top { gap: 12px; flex-wrap: wrap; }
.card .avatar { width: 46px; height: 46px; font-size: 18px; }
.book-badge { font-size: var(--label-size); letter-spacing: .7px; padding: 4px 7px; color: #696453; }
.card h3 { font-size: 27px; line-height: 1.2; margin-bottom: 9px; }
.card .role { font-size: var(--label-size); line-height: 1.65; color: #756548; letter-spacing: 1px; }
.card .description { font-size: var(--reading-size); line-height: 1.75; color: #5e6357; }
.card-bottom { font-size: var(--secondary-size); line-height: 1.6; color: #636859; }
.card-bottom > span { min-width: 0; }
.card-bottom svg { width: 18px; height: 18px; }
.card-saved { white-space: nowrap; }
.explore-bottom { font-size: var(--secondary-size); color: #756548; gap: 12px; flex-wrap: wrap; }
.explore-bottom > a { font-size: var(--secondary-size); min-height: 44px; gap: 10px; }
.empty p { font-size: var(--reading-size); }
.empty button { font-size: var(--control-size); min-height: 44px; }

.timeline-card > p, .timeline-card li p { font-size: var(--reading-size); color: #606557; line-height: 1.8; }
.timeline-card li small { font-size: var(--label-size); color: #756548; }
.timeline-card li h4 { font-size: 23px; margin-top: 5px; }
.timeline-card li { padding-bottom: 26px; }
.timeline-card .timeline-end { font-size: var(--secondary-size); }
.book-copy > p { font-size: var(--reading-size); line-height: 1.8; color: #606557; }
.book-copy .book-place { font-size: var(--secondary-size); color: #756548; }
.book-copy h3 { font-size: 32px; line-height: 1.2; margin-bottom: 9px; }
.book-status { font-size: var(--label-size); letter-spacing: .6px; color: #5d674f; }
.book-status.development { color: #746246; }
.text-link { font-size: var(--control-size); min-height: 44px; line-height: 1.5; }
.text-link svg { width: 18px; height: 18px; }
.purchase-button { font-size: var(--control-size); min-height: 48px; line-height: 1.5; gap: 12px; padding: 11px 16px; }
.purchase-button svg { width: 18px; height: 18px; }
.shelf-note { font-size: var(--secondary-size); line-height: 1.8; color: #756b59; }
.author-byline { font-size: var(--control-size); }
.author-prose p { font-size: var(--body-size); line-height: 1.85; color: #5e6457; }
.author-prose .author-lead { font-size: 25px; line-height: 1.55; }
footer { flex-wrap: wrap; }
.footer-brand { font-size: 21px; }
footer > p { font-size: var(--secondary-size); color: #69695d; }

.dialog-close { width: 44px; height: 44px; }
.detail-inner h2 { margin-right: 38px; }
.detail-role { font-size: var(--secondary-size); color: #756548; letter-spacing: 1px; }
.detail-text { font-size: var(--body-size); line-height: 1.8; color: #5e6457; }
.detail-label { font-size: var(--label-size); color: #756548; }
.related button { font-size: var(--control-size); min-height: 44px; line-height: 1.5; padding: 8px 14px; }
.save-detail { font-size: var(--control-size); min-height: 48px; }
.detail-disclaimer { font-size: var(--secondary-size); line-height: 1.7; color: #716954; }
.toast { font-size: var(--control-size); }
.personal-notebook p { font-size: var(--reading-size); line-height: 1.8; color: #62665b; max-width: 380px; }
.personal-notebook label { font-size: var(--control-size); }
.personal-notebook textarea { font-size: var(--reading-size); line-height: 1.75; min-height: 170px; }
.note-actions { flex-wrap: wrap; }
.note-actions small { font-size: var(--secondary-size); color: #656957; }
.note-actions button { font-size: var(--control-size); min-height: 44px; padding: 10px 16px; }
.note-secondary-actions button { font-size: var(--secondary-size); min-height: 44px; text-align: left; }

@media (max-width: 1050px) {
  .header nav { gap: 18px; }
  .header nav .private { font-size: var(--label-size); }
  .tabs { gap: 16px; }
  .tabs .tab-count { display: none; }
  .book-grid { grid-template-columns: 1fr; gap: 24px; }
  .book-cover { width: 150px; flex-basis: 150px; }
  .book-copy > p { max-width: 600px; }
}

@media (max-width: 850px) {
  .header nav { flex: 1 0 100%; justify-content: space-between; flex-wrap: wrap; }
  .header nav .private { font-size: var(--secondary-size); }
  .toolbar { grid-template-columns: minmax(0, 1fr) auto; }
  .search { grid-column: 1 / -1; }
  .tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; }
  .tabs button { padding: 15px 0; }
  .section-heading { align-items: flex-start; flex-wrap: wrap; gap: 14px 24px; }
  .author-bio { grid-template-columns: 1fr; gap: 28px; }
  .personal-notebook { grid-template-columns: 1fr; }
  .personal-notebook p { max-width: none; }
}

@media (max-width: 620px) {
  .header { padding: 22px 21px 14px; gap: 14px; }
  .brand-name { font-size: 24px; }
  .brand-monogram { font-size: 27px; }
  .header nav { gap: 4px 20px; justify-content: flex-start; }
  .header nav .private { font-size: var(--label-size); margin: 5px 0; }
  .hero-copy { padding-top: 0; }
  .hero-description { max-width: none; }
  .hero-footnote { font-size: var(--secondary-size); }
  .section-heading > p { flex-basis: 100%; }
  .section-heading h2 { font-size: 34px; }
  .tabs { gap: 0 14px; }
  .tabs button { font-size: var(--control-size); gap: 7px; }
  .tabs button svg { width: 18px; height: 18px; }
  .cards, .cards.timeline-mode { grid-template-columns: minmax(0, 1fr); }
  .card { padding: 25px 23px 20px; }
  .card h3 { font-size: 28px; }
  .results-info { align-items: flex-start; gap: 7px; }
  .results-info > span { flex-basis: 100%; }
  .explore-bottom > a { width: 100%; margin-left: 0; }
  .book-card { padding: 24px; gap: 24px; }
  .book-cover { width: 130px; flex-basis: 130px; }
  .book-copy h3 { font-size: 30px; }
  .author-prose .author-lead { font-size: 24px; }
  footer { gap: 15px; }
  footer .private { margin-left: 0; }
  .detail-inner { padding: 30px 25px; }
}

@media (max-width: 480px) {
  .toolbar { grid-template-columns: minmax(0, 1fr); }
  .saved-filter { justify-self: start; padding: 10px 16px; }
  .book-card { flex-direction: column; }
  .book-cover { width: 158px; flex-basis: auto; }
  .book-copy { width: 100%; }
  .book-actions { gap: 12px; }
  .book-copy .eyebrow { margin-bottom: 13px; }
}