:root {
  --paper: #f6f2ea;
  --paper-deep: #eee8dd;
  --ink: #0d1522;
  --ink-soft: #334155;
  --teal: #338885;
  --rule: #c9cbd0;
  --white: #fffdf8;
  --display: Baskerville, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--paper);
}
.skip-link:focus { top: 12px; }

.container {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.site-header { padding: 22px 0 14px; }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand-wordmark {
  display: inline-flex;
  align-items: center;
  line-height: 1;
  white-space: nowrap;
}
.brand-wordmark img {
  width: clamp(148px, 14vw, 176px);
  height: auto;
}
.main-nav { display: flex; align-items: center; gap: 28px; font-size: 0.92rem; color: var(--ink-soft); }
.main-nav a:hover { color: var(--ink); }
.nav-cta { border: 1px solid var(--ink); padding: 10px 16px; color: var(--ink) !important; }
.nav-cta:hover { background: var(--ink); color: var(--paper) !important; }
.menu-button { display: none; border: 0; background: none; color: var(--ink); padding: 8px; font-size: 1.35rem; }

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.display { font-family: var(--display); font-weight: 400; letter-spacing: -0.025em; }
.rule-teal { display: block; width: 58px; height: 2px; background: var(--teal); }
.rule-top { border-top: 1px solid var(--rule); }
.section { padding: 54px 0; }

.hero { padding: 34px 0 58px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(280px, 5fr); gap: 64px; align-items: center; }
.hero h1 { margin: 14px 0 0; font-size: clamp(4rem, 7.3vw, 6.4rem); line-height: 0.9; }
.hero .rule-teal { margin-top: 18px; }
.hero-subtitle { margin: 20px 0 0; font-family: var(--display); font-size: clamp(1.7rem, 2.5vw, 2.15rem); font-style: italic; color: var(--ink-soft); }
.hero-copy { margin: 18px 0 0; max-width: 56ch; font-size: 1.04rem; line-height: 1.7; color: #1e293b; }
.hero-actions { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.helper { margin: 8px 0 0; font-size: 0.77rem; color: #64748b; }
.cover-stage { display: flex; justify-content: flex-end; }
.cover-frame { position: relative; width: min(100%, 250px); overflow: visible; }
.cover-frame::before { content: ""; position: absolute; inset: -18px; transform: translate(13px, 13px); background: var(--paper-deep); z-index: -1; }
.cover-frame img { width: 100%; height: auto; max-height: 500px; object-fit: contain; aspect-ratio: 5 / 8; box-shadow: 0 30px 60px -22px rgb(13 21 34 / 0.3); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 26px;
  border: 1px solid var(--ink);
  font-size: 0.9rem;
  transition: 160ms ease;
}
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: #1e293b; }
.btn-light { background: transparent; color: var(--ink); }
.btn-light:hover { background: var(--ink); color: var(--paper); }

.dark { background: var(--ink); color: var(--paper); }
.dark .eyebrow { color: rgb(246 242 234 / 0.58); }
.dark .display { color: var(--paper); }
.series-grid, .author-grid, .faq-grid { display: grid; grid-template-columns: 4fr 7fr; gap: 9%; }
.series-copy { display: grid; gap: 18px; }
.series-lead { margin: 0; font-family: var(--display); font-size: clamp(1.8rem, 3vw, 2.45rem); line-height: 1.18; color: var(--paper); }
.series-body { margin: 0; color: rgb(246 242 234 / 0.78); max-width: 64ch; }
.series-pairs { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 2px; }
.series-pairs > div { border-top: 1px solid rgb(246 242 234 / 0.3); padding-top: 16px; }
.series-pairs h3 { margin: 7px 0 3px; font-family: var(--display); font-size: 1.75rem; font-weight: 400; }
.series-pairs p { margin: 0; color: rgb(246 242 234 / 0.68); font-size: 0.9rem; }

.section-title { margin: 12px 0 0; font-size: clamp(2.7rem, 5vw, 4.35rem); line-height: 0.98; max-width: 16ch; }
.section-head .rule-teal { margin-top: 18px; }
.books-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 30px; }
.book-card { display: grid; grid-template-columns: 42% 58%; border: 1px solid var(--rule); min-height: 100%; background: var(--paper); }
.book-media { display: flex; align-items: center; justify-content: center; padding: 22px; overflow: visible; }
.book-media.navy,
.book-media.cream { background: var(--paper-deep); }
.book-media img {
  display: block;
  width: 205px;
  height: 328px;
  max-width: 100%;
  max-height: 100%;
  object-fit: cover;
  object-position: center;
  flex: 0 0 auto;
  box-shadow: 0 18px 40px -20px rgb(13 21 34 / 0.45);
}
.book-copy { display: flex; flex-direction: column; padding: 28px; }
.book-copy h3 { margin: 8px 0 0; font-family: var(--display); font-weight: 400; font-size: 2.2rem; line-height: 1; }
.book-subtitle { margin: 10px 0 0; font-family: var(--display); font-size: 1.34rem; font-style: italic; color: var(--ink-soft); line-height: 1.2; }
.book-copy .rule-teal { margin-top: 13px; }
.book-territory { margin: 16px 0 0; font-size: 0.9rem; font-weight: 600; }
.book-description { margin: 9px 0 0; font-size: 0.94rem; line-height: 1.62; color: #334155; }
.book-actions { margin-top: auto; padding-top: 22px; }

.paper-deep { background: color-mix(in srgb, var(--paper-deep) 58%, var(--paper)); }
.author-copy p { margin: 0 0 13px; font-size: 1.04rem; line-height: 1.7; color: #283548; }
.inline-link { display: inline-block; margin-top: 4px; border-bottom: 1px solid var(--ink); padding-bottom: 2px; font-size: 0.9rem; }
.inline-link:hover { color: var(--teal); border-color: var(--teal); }

.start { text-align: center; }
.start .section-title { margin-left: auto; margin-right: auto; max-width: 20ch; }
.start .rule-teal { margin-left: auto; margin-right: auto; }
.start-actions { display: flex; justify-content: center; gap: 12px; margin-top: 24px; flex-wrap: wrap; }

#faq.section { padding-top: 34px; padding-bottom: 34px; }
#faq .faq-grid { grid-template-columns: 3fr 8fr; gap: 6%; }
#faq .section-title { font-size: clamp(2.45rem, 4.2vw, 3.65rem); }
.faq-list { margin: 0; border-top: 1px solid var(--rule); }
.faq-item { display: grid; grid-template-columns: 5fr 7fr; gap: 24px; padding: 12px 0; border-bottom: 1px solid var(--rule); }
.faq-item dt { font-family: var(--display); font-size: 1.22rem; line-height: 1.3; }
.faq-item dd { margin: 0; color: #475569; line-height: 1.5; font-size: 0.96rem; }

.site-footer { border-top: 1px solid var(--rule); }
.footer-inner { padding: 14px 0 16px; }
.footer-top, .footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.footer-top { font-size: 0.78rem; color: var(--ink-soft); }
.footer-brand { font-family: var(--display); font-size: 1.12rem; color: var(--ink); white-space: nowrap; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px 12px; }
.footer-links a:hover, .footer-credit:hover { color: var(--teal); }
.footer-bottom { margin-top: 9px; padding-top: 9px; border-top: 1px solid var(--rule); font-size: 0.7rem; color: #64748b; }

.legal { max-width: 790px; padding: 42px 0 58px; }
.legal h1 { margin: 12px 0 0; font-family: var(--display); font-size: clamp(2.6rem, 6vw, 4rem); font-weight: 400; }
.legal .rule-teal { margin: 14px 0 28px; }
.legal h2 { margin: 28px 0 8px; font-family: var(--display); font-size: 1.65rem; font-weight: 400; }
.legal p, .legal li { color: #334155; line-height: 1.7; }
.legal a:not(.brand-wordmark) { text-decoration: underline; text-underline-offset: 3px; }
.back { font-size: 0.84rem; color: var(--ink-soft); }

.not-found { min-height: 70vh; display: grid; place-items: center; text-align: center; }
.not-found h1 { font-family: var(--display); font-size: clamp(3.5rem, 8vw, 6rem); font-weight: 400; margin: 10px 0; }

@media (max-width: 1060px) {
  .menu-button { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    left: 20px;
    right: 20px;
    top: 72px;
    z-index: 30;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    background: var(--paper);
    border: 1px solid var(--rule);
    box-shadow: 0 18px 40px rgb(13 21 34 / 0.12);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 10px; }
  .nav-cta { margin-top: 6px; text-align: center; }
  .hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .cover-stage { order: -1; justify-content: center; }
  .cover-frame { width: min(62vw, 245px); }
  .series-grid, .author-grid, .faq-grid { grid-template-columns: 1fr; gap: 34px; }
  .books-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .container { width: min(calc(100% - 30px), var(--max)); }
  .site-header { padding-top: 18px; }
  .section { padding: 40px 0; }
  .hero { padding: 24px 0 42px; }
  .hero h1 { font-size: clamp(3.75rem, 18vw, 5.4rem); }
  .hero-actions, .start-actions { flex-direction: column; }
  .btn { width: 100%; }
  .series-pairs { grid-template-columns: 1fr; }
  .book-card { grid-template-columns: 1fr; }
  .book-media { padding: 24px; }
  .book-media img {
    width: min(64vw, 205px);
    height: auto;
    aspect-ratio: 5 / 8;
    object-fit: cover;
  }
  .book-copy { padding: 22px; }
  #faq.section { padding-top: 30px; padding-bottom: 30px; }
  #faq .faq-grid { gap: 22px; }
  .faq-item { grid-template-columns: 1fr; gap: 5px; padding: 10px 0; }
  .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; gap: 7px; }
  .footer-links { justify-content: flex-start; }
  .footer-inner { padding: 12px 0 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}