:root {
  --bg: #f5f2ea;
  --paper: #fffdf8;
  --ink: #17202a;
  --muted: #63707b;
  --blue: #0f4370;
  --blue-dark: #092d4e;
  --blue-soft: #dce8f1;
  --gold: #9b712a;
  --line: #d9d4c9;
  --white: #ffffff;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(18, 32, 43, 0.12);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 242, 234, 0.92);
  border-bottom: 1px solid rgba(23, 32, 42, 0.08);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  font-family: "Libre Baskerville", Georgia, serif;
  font-weight: 700;
  font-size: 16px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 18px;
}

.brand-text small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .03em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 27px;
}

.main-nav a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  color: #3c4852;
}

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

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: 8px;
}

.menu-toggle span:not(.sr-only) {
  width: 24px;
  height: 2px;
  margin: 5px 0;
  display: block;
  background: var(--ink);
}

/* Type */

h1,
h2,
h3 {
  margin: 0;
  font-family: "Libre Baskerville", Georgia, serif;
  line-height: 1.15;
}

h1 {
  font-size: clamp(48px, 7vw, 86px);
  letter-spacing: -0.045em;
}

h1 span {
  color: var(--blue);
}

h2 {
  font-size: clamp(32px, 4.3vw, 52px);
  letter-spacing: -0.035em;
}

h3 {
  font-size: 26px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .18em;
}

.eyebrow.light {
  color: #e6c88e;
}

.lead {
  font-size: 19px;
  color: var(--muted);
}

/* Hero */

.hero {
  padding: 78px 0 92px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 74px;
  align-items: center;
}

.hero-intro {
  max-width: 680px;
  margin: 28px 0 0;
  color: #4f5e69;
  font-size: 20px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 10px 30px rgba(15, 67, 112, 0.2);
}

.button-primary:hover {
  background: var(--blue-dark);
}

.button-secondary {
  color: var(--blue);
  border-color: #bfc9d0;
  background: rgba(255,255,255,.5);
}

.button-outline {
  color: var(--blue);
  border-color: var(--blue);
  background: transparent;
}

.button-light {
  background: var(--white);
  color: var(--blue-dark);
}

.full {
  width: 100%;
}

.hero-meta {
  display: flex;
  gap: 34px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.hero-meta div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-meta strong {
  font-size: 14px;
}

.hero-meta span {
  color: var(--muted);
  font-size: 12px;
}

.cover-stage {
  position: relative;
  display: flex;
  align-items: center;
  flex-direction: column;
}

.book-cover {
  position: relative;
  width: min(100%, 485px);
  aspect-ratio: 7 / 9.8;
  padding: 6px 6px;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 80% 20%, rgba(255,255,255,.10), transparent 25%),
    linear-gradient(150deg, #174f7c 0%, #0e355c 54%, #09263f 100%);
  box-shadow: var(--shadow);
  transform: rotate(10deg);
}

.book-cover::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  width: 1px;
  background: rgba(255,255,255,.15);
}

.cover-topline {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .18em;
  opacity: .7;
}

.cover-title {
  margin-top: 24px;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(50px, 6vw, 72px);
  line-height: .94;
  letter-spacing: -.05em;
}

.cover-rule {
  width: 64px;
  height: 4px;
  margin: 25px 0 18px;
  background: #d3aa58;
}

.cover-subtitle {
  width: 190px;
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 19px;
  line-height: 1.35;
}

.cover-diagram {
  position: absolute;
  left: 38px;
  right: 38px;
  bottom: 88px;
  height: 72px;
}

.cover-diagram span {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255,255,255,.55);
}

.cover-diagram span:first-child {
  top: 18px;
}

.cover-diagram span:nth-child(2) {
  top: 48px;
}

.cover-diagram i {
  position: relative;
  top: 27px;
  margin-right: 23px;
  color: #d3aa58;
  font-style: normal;
  font-size: 11px;
}

.cover-author {
  position: absolute;
  left: 38px;
  bottom: 35px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .13em;
}

.cover-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

/* Sections */

.section {
  padding: 102px 0;
}

.section-light {
  background: var(--paper);
}

.section-dark {
  background: var(--blue-dark);
  color: var(--white);
}

.split {
  display: grid;
  grid-template-columns: .88fr 1.12fr;
  gap: 90px;
}

.prose {
  color: #52606b;
  font-size: 18px;
}

.prose p:first-child {
  margin-top: 0;
}

.prose em {
  color: var(--blue);
  font-style: normal;
  font-weight: 700;
}

.section-heading {
  max-width: 820px;
  margin: 0 auto 50px;
  text-align: center;
}

.section-heading.left {
  margin-left: 0;
  text-align: left;
}

.section-heading > p:last-child {
  color: var(--muted);
}

/* Editions */

.edition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.edition-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 520px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.58);
}

.edition-card.featured {
  border-color: rgba(15,67,112,.28);
  background: var(--white);
  box-shadow: 0 18px 60px rgba(15,67,112,.10);
}

.edition-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.edition-type {
  margin: 0 0 7px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
}

.price {
  margin: 24px 0 22px;
  color: var(--blue);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 34px;
  font-weight: 700;
}

.price small {
  display: inline-block;
  margin-left: 4px;
  color: var(--muted);
  font-family: "Inter", Arial, sans-serif;
  font-size: 11px;
  font-weight: 600;
}

.edition-copy {
  color: var(--muted);
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 28px;
}

.check-list li {
  position: relative;
  padding: 8px 0 8px 28px;
  border-bottom: 1px solid #ebe7de;
  font-size: 14px;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 800;
}

.edition-actions {
  display: grid;
  gap: 10px;
  margin-top: auto;
}

.edition-card > .button {
  margin-top: auto;
}

/* Story */

.story-grid {
  display: grid;
  grid-template-columns: .65fr 1.35fr;
  gap: 80px;
  align-items: start;
}

.story-number {
  color: rgba(255,255,255,.08);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: clamp(95px, 16vw, 190px);
  font-weight: 700;
  line-height: .8;
  letter-spacing: -.08em;
}

.story-grid h2 {
  max-width: 760px;
  margin-bottom: 30px;
}

.story-grid p:not(.eyebrow) {
  max-width: 730px;
  color: #bfd0de;
  font-size: 18px;
}

/* Authors */

.author-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}

.author-card {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 24px;
  align-items: start;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.portrait-placeholder {
  display: grid;
  place-items: center;
  width: 92px;
  height: 112px;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 25px;
  font-weight: 700;
}

.role {
  margin-top: 6px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.author-card p:last-child {
  color: var(--muted);
}

/* Beyond */

.beyond-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 90px;
}

.topic-list {
  display: grid;
  gap: 12px;
}

.topic-card {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 15px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,.52);
  text-decoration: none;
  transition: border-color .18s ease, transform .18s ease;
}



.topic-card:hover {
  transform: translateX(4px);
  border-color: #a9b9c5;
}

.topic-card > span {
  color: var(--gold);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 24px;
}

.topic-card div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-card strong {
  color: var(--blue-dark);
}

.topic-card small {
  color: var(--muted);
  font-size: 13px;
}

.card-index {
  color: var(--gold);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 24px;
}

/* CTA */

.cta-section {
  padding-top: 0;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 54px;
  border-radius: 22px;
  background: var(--blue);
  color: var(--white);
}

.cta-box h2 {
  max-width: 760px;
  font-size: clamp(28px, 4vw, 46px);
}

/* Footer */

.site-footer {
  padding: 52px 0;
  color: #d2dbe2;
  background: #101b24;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 48px;
  align-items: start;
}

.footer-grid strong {
  color: var(--white);
  font-family: "Libre Baskerville", Georgia, serif;
  font-size: 20px;
}

.footer-grid p {
  margin: 6px 0 0;
  color: #93a4b1;
  font-size: 13px;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a,
.footer-meta a {
  color: #d2dbe2;
  text-decoration: none;
  font-size: 13px;
}

.footer-meta {
  text-align: right;
}

/* Placeholder warning */

.link-warning {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 100;
  max-width: 330px;
  padding: 14px 18px;
  border-radius: 12px;
  background: #101b24;
  color: var(--white);
  box-shadow: 0 12px 36px rgba(0,0,0,.18);
  font-size: 13px;
  opacity: 0;
  transform: translateY(15px);
  pointer-events: none;
  transition: .2s ease;
}

.link-warning.show {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px 20px 22px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 13px 0;
  }

  .hero-grid,
  .split,
  .story-grid,
  .beyond-grid {
    grid-template-columns: 1fr;
    gap: 55px;
  }

  .hero-copy {
    order: 1;
  }

  .cover-stage {
    order: 2;
  }

  .edition-grid {
    grid-template-columns: 1fr;
  }

  .edition-card {
    min-height: 0;
  }

  .author-grid {
    grid-template-columns: 1fr;
  }

  .story-number {
    font-size: 115px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-meta {
    grid-column: 1 / -1;
    text-align: left;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(calc(100% - 28px), var(--max));
  }

  .nav-wrap {
    min-height: 70px;
  }

  .main-nav {
    top: 70px;
  }

  .brand-text small {
    display: none;
  }

  .hero {
    padding: 55px 0 72px;
  }

  h1 {
    font-size: 49px;
  }

  .hero-intro {
    font-size: 17px;
  }

  .hero-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .book-cover {
    max-width: 310px;
  }

  .section {
    padding: 76px 0;
  }

  .edition-card,
  .author-card {
    padding: 25px;
  }

  .author-card {
    grid-template-columns: 1fr;
  }

  .cta-box {
    align-items: flex-start;
    flex-direction: column;
    padding: 34px 26px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-meta {
    grid-column: auto;
  }
}


/* Language switch */

.language-switch {
  display: inline-flex !important;
  align-items: center;
  gap: 5px !important;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.55);
  font-size: 12px !important;
}

.language-switch span {
  font-size: 10px;
  letter-spacing: .06em;
}

/* Printed edition ebook note */

.print-ebook-note {
  max-width: 820px;
  margin: 30px auto 0;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

.print-ebook-note a {
  color: var(--blue);
  font-weight: 700;
}

/* Beyond the book carousel */

.beyond-heading-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 38px;
}

.beyond-heading-row > div:first-child {
  max-width: 780px;
}

.carousel-controls {
  display: flex;
  gap: 10px;
  flex: 0 0 auto;
}

.carousel-button {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255,255,255,.72);
  color: var(--blue);
  cursor: pointer;
  font-size: 22px;
  transition: transform .18s ease, background .18s ease;
}

.carousel-button:hover {
  transform: translateY(-2px);
  background: var(--white);
}

.topic-carousel {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(300px, 36%);
  gap: 16px;
  overflow-x: auto;
  padding: 4px 2px 18px;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: #bcc7cf transparent;
}

.topic-carousel .topic-card {
  min-height: 150px;
  grid-template-columns: 52px 1fr;
  align-content: center;
  scroll-snap-align: start;
}

.topic-carousel .topic-card:hover {
  transform: translateY(-3px);
}

/* Ebook request */

.compact-section {
  padding-top: 72px;
  padding-bottom: 72px;
}

.ebook-request-box {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 70px;
  align-items: start;
}

.ebook-request-box h2 {
  font-size: clamp(28px, 4vw, 42px);
}

.ebook-request-box p {
  margin-top: 0;
  color: var(--muted);
  font-size: 17px;
}

.ebook-request-box .small-note {
  font-size: 13px;
}

@media (max-width: 900px) {
  .language-switch {
    width: auto !important;
    margin-top: 8px;
  }

  .beyond-heading-row {
    align-items: flex-start;
  }

  .topic-carousel {
    grid-auto-columns: minmax(280px, 62%);
  }

  .ebook-request-box {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 620px) {
  .beyond-heading-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .topic-carousel {
    grid-auto-columns: 88%;
  }
}


/* Sample section */

.sample-section .button {
  margin-top: 10px;
}