:root {
  --ink: #112f4d;
  --paper: #f4f1e9;
  --white: #fffdf8;
  --coral: #ed664d;
  --blue: #306f9f;
  --line: rgba(17, 47, 77, 0.18);
  --sans: "DM Sans", system-ui, sans-serif;
  --serif: "Newsreader", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px clamp(24px, 5vw, 76px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
}
.back-to-projects { max-width: 310px; font-size: .75rem; line-height: 1.35; letter-spacing: .035em; text-transform: uppercase; }
.back-to-projects > span:first-child { color: var(--coral); font-size: 1.15rem; transition: transform .2s ease; }
.back-to-projects:hover > span:first-child { transform: translateX(-4px); }
.header-link {
  color: var(--white);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}
.header-nav { display: flex; gap: clamp(18px, 3vw, 38px); }
.language-switcher { display: inline-flex; align-items: center; gap: 6px; color: rgba(255,255,255,.42); }
.language-switcher button { padding: 3px 0; border: 0; border-bottom: 1px solid transparent; color: rgba(255,255,255,.55); background: transparent; font: 700 .7rem var(--sans); cursor: pointer; }
.language-switcher button.is-active { border-bottom-color: var(--coral); color: var(--white); }

.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  background: var(--ink);
  overflow: hidden;
}
.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 130px clamp(28px, 7vw, 120px) 70px;
}
.eyebrow {
  margin: 0 0 24px;
  color: var(--coral);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
h1 {
  margin: 0;
  color: var(--white);
  font-family: var(--serif);
  font-size: clamp(4rem, 8vw, 8.8rem);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.77;
}
h1 em { color: var(--coral); font-weight: inherit; }
.byline {
  margin: clamp(38px, 7vh, 72px) 0 32px;
  color: rgba(255, 253, 248, 0.7);
  font-size: 0.92rem;
  line-height: 1.6;
}
.primary-link {
  width: fit-content;
  display: flex;
  gap: 36px;
  align-items: center;
  padding-bottom: 9px;
  border-bottom: 1px solid rgba(255,255,255,.4);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.primary-link span { color: var(--coral); font-size: 1.25rem; }

.cover-stage {
  position: relative;
  display: grid;
  place-content: center;
  min-height: 100%;
  padding: 110px clamp(40px, 6vw, 100px) 55px;
  background: var(--blue);
}
.cover-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .2;
  background-image: linear-gradient(rgba(255,255,255,.16) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.16) 1px, transparent 1px);
  background-size: 48px 48px;
}
.book-cover {
  position: relative;
  z-index: 2;
  display: block;
  width: min(100%, 390px);
  max-height: 66vh;
  object-fit: contain;
  margin: auto;
  box-shadow: 0 35px 70px rgba(7, 24, 41, 0.38);
  transform: rotate(1.5deg);
}
.figure-note {
  position: relative;
  z-index: 2;
  max-width: 390px;
  margin: 27px auto 0;
  color: rgba(255,255,255,.72);
  font-size: .77rem;
  line-height: 1.5;
}

.introduction {
  position: relative;
  display: grid;
  grid-template-columns: minmax(260px, .85fr) minmax(320px, 1.15fr);
  gap: clamp(50px, 9vw, 150px);
  padding: clamp(90px, 12vw, 180px) clamp(28px, 8vw, 140px);
  background: var(--white);
}
.section-number {
  position: absolute;
  top: 34px;
  left: clamp(28px, 8vw, 140px);
  color: var(--blue);
  font-size: .75rem;
  font-weight: 700;
}
h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.8rem, 5.5vw, 5.5rem);
  font-weight: 500;
  letter-spacing: -.045em;
  line-height: .95;
}
.intro-body { max-width: 700px; padding-top: 28px; }
.intro-body p { color: #40556a; font-size: 1rem; line-height: 1.8; }
.intro-body .lead {
  margin-top: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.7rem, 2.5vw, 2.45rem);
  line-height: 1.25;
}
.official-source { padding-left: 16px; border-left: 3px solid var(--coral); font-size: .86rem !important; }
.official-source a { color: var(--blue); font-weight: 600; overflow-wrap: anywhere; }
.book-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 54px 0 0;
  border-top: 1px solid var(--line);
}
.book-facts div { padding: 20px 12px 0 0; }
.book-facts dt { color: var(--blue); font-size: .68rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.book-facts dd { margin: 8px 0 0; font-size: .9rem; font-weight: 600; }

.formats {
  display: grid;
  grid-template-columns: minmax(280px, .85fr) minmax(360px, 1.15fr);
  gap: 60px clamp(50px, 9vw, 150px);
  padding: clamp(90px, 12vw, 180px) clamp(28px, 8vw, 140px);
  color: var(--white);
  background: var(--ink);
}
.formats h2 { color: var(--white); }
.formats-copy .lead { margin-top: 0; color: var(--white); font-family: var(--serif); font-size: clamp(1.5rem, 2.25vw, 2.2rem); line-height: 1.3; }
.formats-copy > p:not(.lead) { color: rgba(255,255,255,.72); line-height: 1.8; }
.formats-copy .editor-note { margin-top: 28px; padding: 18px 20px; color: var(--white); background: rgba(48,111,159,.3); border-left: 3px solid var(--coral); }
.license-note { display: flex; gap: 20px; margin-top: 34px; padding: 23px 0; border-top: 1px solid rgba(255,255,255,.18); border-bottom: 1px solid rgba(255,255,255,.18); }
.license-note p { margin: 0; color: rgba(255,255,255,.74); font-size: .82rem; line-height: 1.65; }
.license-note a { color: var(--white); }
.license-badge { flex: 0 0 auto; display: grid; place-items: center; width: 44px; height: 44px; border: 2px solid var(--coral); border-radius: 50%; color: var(--coral); font-weight: 700; }
.format-grid { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.format-card { min-height: 300px; display: flex; flex-direction: column; align-self: stretch; padding: 25px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); text-decoration: none; transition: color .2s, background .2s, transform .2s; }
.format-card:hover, .format-card:focus-visible { color: var(--ink); background: var(--coral); transform: translateY(-4px); }
.format-number { flex: 0 0 auto; margin-bottom: 48px; color: rgba(255,255,255,.48); font-size: .7rem; }
.format-card strong { margin-bottom: 12px; font-family: var(--serif); font-size: 2rem; font-weight: 500; }
.format-card > span:not(.format-number) { min-height: 46px; font-size: .83rem; line-height: 1.5; }
.format-card small { margin-top: 24px; color: rgba(255,255,255,.55); }
.format-card:hover small, .format-card:hover .format-number { color: rgba(17,47,77,.66); }
.format-card-epub:hover { color: var(--white); background: transparent; transform: none; }
.format-card-epub:hover small, .format-card-epub:hover .format-number { color: rgba(255,255,255,.55); }
.format-actions { display: grid; gap: 7px; margin-top: 16px; }
.format-actions a { display: block; padding: 8px 10px; border: 1px solid rgba(255,255,255,.3); color: var(--white); font-size: .68rem; font-weight: 700; text-align: center; text-decoration: none; }
.format-actions a:first-child { border-color: var(--coral); background: var(--coral); }
.format-actions a:hover, .format-actions a:focus-visible { color: var(--ink); background: var(--white); }

.reader-section { display: grid; grid-template-columns: minmax(230px, .55fr) minmax(420px, 1.45fr); gap: clamp(40px, 8vw, 130px); padding: clamp(90px, 11vw, 160px) clamp(28px, 8vw, 140px); background: #dce6ea; }
.reader-intro { align-self: start; position: sticky; top: 36px; }
.reader-intro > p:last-child { color: #40556a; line-height: 1.7; }
.reader-shell { min-width: 0; border: 1px solid rgba(17,47,77,.18); background: var(--white); box-shadow: 0 24px 60px rgba(17,47,77,.12); }
.reader-modes { display: grid; grid-template-columns: 1fr 1fr; background: var(--ink); }
.reader-modes button { padding: 15px; border: 0; border-bottom: 3px solid transparent; color: rgba(255,255,255,.65); background: transparent; font: 700 .78rem var(--sans); letter-spacing: .05em; cursor: pointer; }
.reader-modes button.is-active { border-bottom-color: var(--coral); color: var(--white); background: rgba(255,255,255,.06); }
.reader-single-mode { display: block; }
.single-mode-label { padding: 19px 22px 17px; border-bottom: 4px solid var(--coral); color: var(--white); background: rgba(255,255,255,.06); font-size: 1.08rem; font-weight: 700; letter-spacing: .04em; text-align: center; }
.reader-toolbar { display: flex; gap: 8px; align-items: center; padding: 12px; border-bottom: 1px solid var(--line); }
.search-control { flex: 1; }
.search-control input { width: 100%; min-width: 130px; padding: 10px 12px; border: 0; outline: 0; color: var(--ink); background: #eef1ed; font: inherit; font-size: .82rem; }
.reader-toolbar button { min-height: 38px; padding: 0 12px; border: 1px solid var(--line); color: var(--ink); background: transparent; font: 600 .78rem var(--sans); cursor: pointer; }
.reader-toolbar button:hover, .reader-toolbar button:focus-visible { background: var(--paper); }
.reader-progress { height: 3px; background: #e5e7e4; }
.reader-progress span { display: block; width: 0; height: 100%; background: var(--coral); }
.reader-status { padding: 12px 30px 0; color: #607487; font-size: .72rem; }
.reader-content { --reader-size: 18px; max-height: 72vh; overflow: auto; padding: clamp(28px, 6vw, 72px); outline: none; color: #293e51; font-family: var(--serif); font-size: var(--reader-size); line-height: 1.72; white-space: pre-wrap; }
.reader-content.is-narrow { padding-inline: max(clamp(28px, 6vw, 72px), 14%); }
.reader-content mark { padding: 0 .08em; color: inherit; background: #ffd66f; }
.audio-toolbar { display: grid; grid-template-columns: 1fr 120px; gap: 12px; padding: 16px; border-bottom: 1px solid var(--line); }
.audio-toolbar label { display: grid; gap: 6px; color: var(--blue); font-size: .67rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.audio-toolbar select { width: 100%; padding: 9px 10px; border: 1px solid var(--line); color: var(--ink); background: var(--white); font: 500 .82rem var(--sans); }
#chapter-audio { display: block; width: calc(100% - 32px); height: 48px; margin: 16px; accent-color: var(--coral); }
.audio-navigation { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding: 0 16px 16px; }
.audio-navigation button { padding: 8px 10px; border: 1px solid var(--line); color: var(--ink); background: transparent; font: 600 .72rem var(--sans); cursor: pointer; }
.audio-navigation button:disabled { opacity: .35; cursor: default; }
.audio-navigation p { margin: 0; color: #607487; font-size: .7rem; text-align: center; }
.audio-transcript { max-height: 62vh; overflow: auto; padding: clamp(28px, 6vw, 64px); outline: none; font-family: var(--serif); font-size: 18px; line-height: 1.72; scroll-behavior: smooth; }
.audio-cue { display: inline; margin: 0; padding: .1em .16em; border: 0; border-radius: 3px; color: #526578; background: transparent; font: inherit; line-height: inherit; text-align: left; cursor: pointer; transition: color .15s, background .15s; }
.audio-cue:hover { color: var(--ink); background: rgba(48,111,159,.1); }
.audio-cue.is-active { color: var(--ink); background: #ffd66f; }
.audio-cue[data-heading="true"] { display: block; margin: 1.1em 0 .35em; padding: 0; color: var(--ink); font-size: 1.55em; font-weight: 600; line-height: 1.15; }
.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; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(28px, 8vw, 140px);
  color: rgba(255,255,255,.65);
  background: var(--ink);
  font-size: .72rem;
}
footer p:last-child { text-align: right; line-height: 1.7; }
footer a { color: var(--white); text-underline-offset: 3px; }

[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (max-width: 820px) {
  .site-header { position: absolute; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { min-height: 84svh; }
  .cover-stage { min-height: 78svh; }
  .introduction { grid-template-columns: 1fr; }
  .intro-body { padding-top: 0; }
  .formats, .reader-section { grid-template-columns: 1fr; }
  .format-grid { grid-template-columns: repeat(2, 1fr); }
  .reader-intro { position: static; }
}
@media (max-width: 520px) {
  .header-nav .header-link { display: none; }
  h1 { font-size: clamp(3.6rem, 20vw, 5.2rem); }
  .book-facts { grid-template-columns: 1fr; }
  .book-facts div { padding-bottom: 16px; border-bottom: 1px solid var(--line); }
  .format-grid { grid-template-columns: 1fr; }
  .reader-toolbar { flex-wrap: wrap; }
  .search-control { flex-basis: 100%; }
  .reader-content { max-height: 68vh; }
  .audio-toolbar { grid-template-columns: 1fr; }
  .audio-navigation { grid-template-columns: 1fr 1fr; }
  .audio-navigation p { grid-column: 1 / -1; grid-row: 1; }
  footer { flex-direction: column; }
  footer p { margin: 0; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}