:root {
  --ink: #111827;
  --muted: #4b5563;
  --blue: #124b87;
  --blue-dark: #0a315c;
  --yellow: #f2c94c;
  --paper: #ffffff;
  --soft: #f3f6f9;
  --line: #cbd5e1;
  --focus: #8a4f00;
  --shell: 72rem;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: var(--blue-dark);
  text-decoration-thickness: .09em;
  text-underline-offset: .18em;
}

a:hover { color: var(--blue); }

a:focus-visible {
  outline: .2rem solid var(--focus);
  outline-offset: .25rem;
  border-radius: .1rem;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: .75rem;
  left: .75rem;
  padding: .65rem 1rem;
  color: var(--paper);
  background: var(--blue-dark);
  transform: translateY(-200%);
}

.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(calc(100% - 2.5rem), var(--shell));
  margin-inline: auto;
}

.site-header {
  border-top: .35rem solid var(--blue);
  border-bottom: 1px solid var(--line);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem 3rem;
  padding-block: 1.3rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  color: var(--ink);
  font-weight: 750;
  letter-spacing: .02em;
  text-decoration: none;
}

.brand-logo {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
}

.simple-links {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.5rem;
}

.simple-links a {
  color: var(--ink);
  font-size: .95rem;
  font-weight: 650;
}

.intro { padding-block: clamp(4.5rem, 10vw, 8.5rem); }

.eyebrow,
.book-number {
  margin: 0 0 .7rem;
  color: var(--blue);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-block: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 600;
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  max-width: 13ch;
  font-size: clamp(2.8rem, 8vw, 6.6rem);
  letter-spacing: -.035em;
}

h2 { font-size: clamp(2rem, 4vw, 3.3rem); }
h3 { font-size: clamp(1.4rem, 2.4vw, 1.75rem); }

.lede {
  max-width: 39rem;
  margin: 2rem 0 1.5rem;
  color: var(--muted);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.text-link {
  display: inline-block;
  font-weight: 750;
}

.books-section {
  padding-block: clamp(4rem, 8vw, 7rem);
  background: var(--soft);
  border-block: 1px solid var(--line);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-bottom: 3rem;
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
}

.book-card { min-width: 0; }

.cover {
  display: block;
  aspect-ratio: 2 / 3;
  max-width: 20rem;
  box-shadow: 0 .85rem 1.8rem rgb(17 24 39 / .16);
  text-decoration: none;
}

.cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-info { padding-top: 1.5rem; }
.book-info p:not(.book-number) { color: var(--muted); }

.series-note {
  max-width: 47rem;
  margin: 4rem 0 0;
  padding-left: 1.25rem;
  border-left: .3rem solid var(--yellow);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}

.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 5rem;
  padding-block: clamp(4rem, 9vw, 8rem);
}

.about .eyebrow { grid-column: 1 / -1; }
.about p:not(.eyebrow) { max-width: 37rem; margin-top: .2rem; color: var(--muted); }
.about .text-link { grid-column: 2; }
.about .legal-link { margin-top: .35rem; }

.legal-page {
  max-width: 48rem;
  padding-block: clamp(3.5rem, 8vw, 7rem);
}

.legal-page h1 {
  max-width: none;
  font-size: clamp(2.5rem, 6vw, 4.8rem);
}

.legal-intro {
  max-width: 43rem;
  margin: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.company-details {
  margin: 0 0 3rem;
  border-top: 1px solid var(--line);
}

.company-details div {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) 2fr;
  gap: .5rem 2rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line);
}

.company-details dt { font-weight: 750; }
.company-details dd { margin: 0; }

.publication-section { margin-top: 3.5rem; }
.publication-section h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); }

.publication-list {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.publication-list li {
  padding: 1.25rem;
  background: var(--soft);
  border-left: .25rem solid var(--blue);
}

.publication-list h3 { font-size: 1.3rem; }

.publication-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.5rem;
  margin: .75rem 0 0;
  color: var(--muted);
}

.publication-meta div { display: flex; gap: .3rem; }
.publication-meta dt { font-weight: 700; }
.publication-meta dt::after { content: ":"; }
.publication-meta dd { margin: 0; }

.rights-note {
  margin: 2.5rem 0 3rem;
  padding-left: 1.25rem;
  border-left: .3rem solid var(--yellow);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
}

.book-page { padding-block: clamp(3rem, 7vw, 6rem); }

.back-link { margin-bottom: 2.5rem; }

.book-hero {
  display: grid;
  grid-template-columns: minmax(14rem, 20rem) minmax(0, 1fr);
  align-items: start;
  gap: clamp(2.5rem, 7vw, 6rem);
}

.book-page-cover {
  display: block;
  width: 100%;
  height: auto;
  box-shadow: 0 1rem 2.2rem rgb(17 24 39 / .18);
}

.book-page h1 {
  max-width: 13ch;
  font-size: clamp(2.7rem, 7vw, 5.8rem);
}

.book-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 2rem;
  margin: 1.5rem 0 0;
  padding-block: 1rem;
  border-block: 1px solid var(--line);
}

.book-meta div {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.book-meta dt { color: var(--muted); font-weight: 650; }
.book-meta dt::after { content: ":"; }
.book-meta dd { margin: 0; }

.book-summary {
  max-width: 43rem;
  margin-top: 2rem;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
}

.book-summary p { margin: 0 0 1.25rem; }
.book-summary p:last-child { color: var(--ink); font-weight: 600; }

.store-block {
  max-width: 43rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.store-block h2,
.book-extra h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); }

.store-links {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.25rem;
}

.store-link {
  display: inline-block;
  padding: .7rem 1rem;
  color: #fff;
  background: var(--blue-dark);
  border: 2px solid var(--blue-dark);
  font-weight: 750;
  text-decoration: none;
}

a.store-link:hover { color: #fff; background: var(--blue); }

.store-link-soon {
  color: var(--muted);
  background: var(--soft);
  border-color: var(--line);
  cursor: default;
}

.book-extras {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(16rem, .6fr);
  gap: clamp(2rem, 5vw, 4rem);
  margin-top: clamp(4rem, 9vw, 7rem);
  padding-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
}

.book-extras-single { grid-template-columns: minmax(0, 1fr); }
.book-extras-single .book-extra { max-width: 60rem; }

.book-extra p { color: var(--muted); }

.map-image {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1.5rem;
  border: 1px solid var(--line);
}

.audio-player { width: 100%; margin-top: 1rem; }

.accessible-details {
  margin-top: 1.5rem;
  border-block: 1px solid var(--line);
}

.accessible-details summary {
  padding-block: .9rem;
  color: var(--blue-dark);
  font-weight: 750;
  cursor: pointer;
}

.accessible-details summary:focus-visible {
  outline: .2rem solid var(--focus);
  outline-offset: .2rem;
}

.details-content { padding: .25rem 0 .75rem; }
.details-content p { margin: 0 0 1rem; }
.details-content p:last-child { margin-bottom: 0; }
.lyrics { font-family: Georgia, "Times New Roman", serif; }

.music-track {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.music-track h3 { font-size: 1.4rem; }

.site-footer {
  color: #fff;
  background: var(--ink);
  border-top: .35rem solid var(--yellow);
}

.site-footer p { margin: 0; }
.site-footer a { color: #fff; }
.site-footer a:focus-visible { outline-color: var(--yellow); }

@media (max-width: 48rem) {
  .header-inner,
  .section-heading,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .intro { padding-block: 4.5rem; }

  .book-grid {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .book-card {
    display: grid;
    grid-template-columns: minmax(8.5rem, .7fr) 1fr;
    align-items: start;
    gap: 1.5rem;
  }

  .cover { width: 100%; }
  .book-info { padding-top: 0; }

  .about { grid-template-columns: 1fr; }
  .about .eyebrow,
  .about .text-link { grid-column: auto; }

  .company-details div { grid-template-columns: 1fr; }

  .book-hero,
  .book-extras { grid-template-columns: 1fr; }

  .book-page-cover { max-width: 17rem; }
}

@media (max-width: 30rem) {
  .shell { width: min(calc(100% - 1.5rem), var(--shell)); }
  .simple-links { gap: .35rem 1rem; }
  .book-card { grid-template-columns: 1fr; }
  .cover { max-width: 17rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media (forced-colors: active) {
  .brand-logo,
  .cover,
  .series-note { border: 2px solid CanvasText; }
}