:root {
  color-scheme: light;
  --paper: #f5efdf;
  --paper-deep: #e8dcc4;
  --surface: #fffdf8;
  --ink: #17211f;
  --forest: #18332f;
  --forest-light: #254d46;
  --coral: #b94a2f;
  --coral-bright: #df6b43;
  --gold: #cb8a3d;
  --jade: #4d796b;
  --muted: #665f53;
  --line: rgba(23, 33, 31, 0.18);
  --serif: "Fraunces", Georgia, serif;
  --sans: "Public Sans", "Helvetica Neue", sans-serif;
  --mono: "DM Mono", monospace;
  --book-serif: "Literata", "Iowan Old Style", Georgia, serif;
  --shadow: 0 28px 80px rgba(32, 24, 16, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
}

body::before {
  position: fixed;
  z-index: -2;
  inset: 0;
  background:
    radial-gradient(circle at 12% 8%, rgba(203, 138, 61, 0.17), transparent 28rem),
    radial-gradient(circle at 92% 32%, rgba(77, 121, 107, 0.14), transparent 32rem),
    linear-gradient(135deg, rgba(255, 255, 255, 0.25), transparent 55%);
  content: "";
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

button,
select {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  background: var(--forest);
  color: white;
  transform: translateY(-160%);
}

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

.site-header {
  position: relative;
  z-index: 50;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  min-height: 82px;
  border-bottom: 1px solid var(--line);
  background: rgba(245, 239, 223, 0.88);
  backdrop-filter: blur(16px);
}

.site-header.compact {
  position: sticky;
  top: 0;
}

.wordmark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 210px;
  padding: 13px clamp(22px, 4vw, 62px);
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  letter-spacing: 0.08em;
  line-height: 1.05;
  text-decoration: none;
}

.wordmark span {
  font-size: 10px;
}

.wordmark strong {
  margin-top: 5px;
  font-size: 17px;
}

.site-nav {
  display: flex;
  align-items: stretch;
  margin-left: auto;
}

.site-nav a {
  display: flex;
  align-items: center;
  padding: 0 clamp(14px, 2.1vw, 34px);
  border-left: 1px solid var(--line);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.035em;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--forest);
  color: white;
}

.menu-button {
  display: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}

.section-shell {
  width: min(1240px, calc(100% - 48px));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: clamp(40px, 7vw, 110px);
  align-items: center;
  min-height: calc(100vh - 82px);
  padding-block: clamp(60px, 9vw, 130px);
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--coral);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.hero h1,
.web-book-hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(76px, 10vw, 154px);
  font-weight: 600;
  letter-spacing: -0.07em;
  line-height: 0.8;
}

.hero h1 em {
  color: var(--coral);
  font-weight: 400;
}

.subtitle {
  max-width: 620px;
  margin: 38px 0 0;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.08;
}

.hero-deck {
  max-width: 610px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.45vw, 20px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-actions.centered {
  justify-content: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 22px;
  border: 1px solid var(--forest);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.button-primary {
  background: var(--forest);
  color: white;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--coral);
  border-color: var(--coral);
}

.button-quiet:hover,
.button-quiet:focus-visible {
  background: rgba(24, 51, 47, 0.08);
}

.hero-facts {
  display: flex;
  gap: 0;
  margin: 48px 0 0;
}

.hero-facts div {
  min-width: 128px;
  padding-right: 24px;
  border-right: 1px solid var(--line);
}

.hero-facts div + div {
  padding-left: 24px;
}

.hero-facts div:last-child {
  border: 0;
}

.hero-facts dt {
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1;
}

.hero-facts dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.05em;
}

.hero-art {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cover-stage {
  position: relative;
  width: min(100%, 520px);
  padding: clamp(20px, 4vw, 48px);
}

.cover-stage::before {
  position: absolute;
  inset: 8% 3% 2% 15%;
  background: var(--gold);
  content: "";
  transform: rotate(4deg);
}

.cover-stage a {
  position: relative;
  display: block;
  box-shadow: var(--shadow);
  transform: rotate(-1.2deg);
  transition: transform 240ms ease;
}

.cover-stage a:hover {
  transform: rotate(0deg) translateY(-8px);
}

.cover-stage img {
  width: 100%;
  aspect-ratio: 612 / 792;
  object-fit: contain;
  background: white;
}

.orbit {
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(24, 51, 47, 0.28);
  border-radius: 50%;
}

.orbit-one {
  top: -8%;
  right: -12%;
  width: 48%;
  aspect-ratio: 1;
}

.orbit-two {
  bottom: 0;
  left: -14%;
  width: 36%;
  aspect-ratio: 1;
  border-color: rgba(185, 74, 47, 0.38);
}

.edition-note {
  margin: 22px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.question-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.question-band p {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 116px;
  margin: 0;
  padding: 24px;
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 31px);
  text-align: center;
}

.question-band p + p {
  border-left: 1px solid var(--line);
}

.philosophy-section,
.method-section {
  padding-block: clamp(90px, 11vw, 170px);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.62fr);
  gap: 50px;
  align-items: end;
  margin-bottom: 52px;
}

.section-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -22px;
}

.section-heading h2,
.tension-copy h2,
.reader-panel h2,
.method-copy h2,
.closing-inner h2,
.atlas-heading h2,
.web-principle h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 5.5vw, 78px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.section-heading > p:last-child,
.method-copy > p:last-child,
.web-principle > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.philosophy-card {
  min-height: 390px;
  padding: clamp(28px, 4vw, 54px);
}

.philosophy-card + .philosophy-card {
  border-left: 1px solid var(--line);
}

.philosophy-card span {
  font-family: var(--mono);
  font-size: 11px;
}

.philosophy-card h3 {
  margin: 80px 0 20px;
  font-family: var(--serif);
  font-size: clamp(38px, 4vw, 56px);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.philosophy-card p {
  margin: 0;
  font-size: 15px;
}

.philosophy-card.abundance {
  background: var(--forest);
  color: white;
}

.philosophy-card.fulfillment {
  background: var(--coral);
  color: white;
}

.philosophy-card.contentment {
  background: var(--gold);
  color: var(--ink);
}

.tension-section {
  display: grid;
  grid-template-columns: 0.4fr 1.15fr 0.85fr;
  gap: clamp(30px, 6vw, 90px);
  align-items: center;
  padding-block: 40px 130px;
}

.tension-number {
  color: rgba(185, 74, 47, 0.2);
  font-family: var(--serif);
  font-size: clamp(180px, 25vw, 360px);
  line-height: 0.7;
}

.tension-list {
  border-top: 1px solid var(--line);
}

.tension-list p {
  margin: 0;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
}

.argument-section {
  padding-block: clamp(90px, 11vw, 150px);
  background: var(--forest);
  color: white;
}

.section-heading.light {
  display: block;
  max-width: 900px;
}

.section-heading.light .eyebrow {
  color: #e9b36c;
}

.part-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  border-left: 1px solid rgba(255, 255, 255, 0.3);
}

.part-card {
  display: flex;
  flex-direction: column;
  min-height: 360px;
  padding: 28px;
  border-right: 1px solid rgba(255, 255, 255, 0.3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  text-decoration: none;
  transition: background 180ms ease, color 180ms ease;
}

.part-card:hover,
.part-card:focus-visible {
  background: var(--gold);
  color: var(--ink);
}

.part-card .part-number {
  font-family: var(--mono);
  font-size: 11px;
}

.part-card h3 {
  margin: auto 0 18px;
  font-family: var(--serif);
  font-size: clamp(26px, 2.5vw, 38px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
}

.part-card p {
  margin: 0;
  font-size: 13px;
}

.part-card small {
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 10px;
}

.section-action {
  margin: 42px 0 0;
  text-align: right;
}

.text-link {
  font-weight: 700;
  text-decoration: none;
}

.text-link span {
  display: inline-block;
  margin-left: 10px;
  color: var(--gold);
  font-size: 22px;
  transition: transform 160ms ease;
}

.text-link:hover span {
  transform: translateX(6px);
}

.reader-callout {
  padding-block: clamp(90px, 11vw, 160px);
}

.reader-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 70px;
  padding: clamp(38px, 6vw, 86px);
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(58, 42, 24, 0.12);
}

.reader-panel > div:first-child > p:last-child {
  max-width: 590px;
  color: var(--muted);
}

.reader-links {
  align-self: center;
  border-top: 1px solid var(--line);
}

.reader-links a {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
  text-decoration: none;
}

.reader-links a:hover {
  color: var(--coral);
}

.reader-links span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  text-align: right;
}

.method-section {
  display: grid;
  grid-template-columns: 1.15fr 0.65fr;
  gap: clamp(50px, 10vw, 150px);
  align-items: center;
  border-top: 1px solid var(--line);
}

.method-note {
  padding: 34px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.58);
}

.method-note strong {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.method-note p {
  color: var(--muted);
  font-size: 14px;
}

.method-note a {
  color: var(--coral);
  font-size: 13px;
  font-weight: 700;
}

.closing-section {
  padding-block: clamp(100px, 14vw, 210px);
  background:
    linear-gradient(rgba(23, 33, 31, 0.88), rgba(23, 33, 31, 0.88)),
    radial-gradient(circle at center, var(--jade), var(--forest));
  color: white;
  text-align: center;
}

.closing-inner {
  max-width: 900px;
}

.closing-inner .eyebrow {
  color: #e9b36c;
}

.closing-inner .button-quiet {
  border-color: rgba(255, 255, 255, 0.6);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 44px clamp(24px, 5vw, 76px);
  background: #101c1a;
  color: white;
}

.site-footer strong {
  font-family: var(--serif);
  font-size: 22px;
}

.site-footer p {
  margin: 5px 0 0;
  color: rgba(255, 255, 255, 0.65);
  font-size: 12px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
}

.site-footer nav a {
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}

/* Web edition */

.web-book-hero {
  max-width: 1040px;
  padding-block: clamp(90px, 12vw, 180px) 90px;
}

.web-book-hero h1 {
  max-width: 900px;
  font-size: clamp(64px, 9vw, 130px);
}

.web-book-hero > p:not(.eyebrow) {
  max-width: 720px;
  margin: 36px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.web-progress {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.web-progress div {
  min-height: 112px;
  padding: 26px clamp(22px, 4vw, 60px);
}

.web-progress div + div {
  border-left: 1px solid var(--line);
}

.web-progress span {
  display: block;
  color: var(--coral);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.web-progress strong {
  display: block;
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
}

.chapter-atlas {
  padding-block: clamp(90px, 10vw, 150px);
}

.atlas-heading {
  display: grid;
  grid-template-columns: 1fr 0.55fr;
  gap: 50px;
  align-items: end;
  margin-bottom: 70px;
}

.atlas-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -20px;
}

.atlas-heading > p:last-child {
  margin: 0;
  color: var(--muted);
}

.book-part {
  display: grid;
  grid-template-columns: minmax(230px, 0.36fr) minmax(0, 1fr);
  border-top: 2px solid var(--ink);
}

.book-part + .book-part {
  margin-top: 76px;
}

.book-part-heading {
  padding: 28px 34px 28px 0;
}

.book-part-heading span {
  font-family: var(--mono);
  font-size: 10px;
}

.book-part-heading h3 {
  margin: 56px 0 14px;
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1;
}

.book-part-heading p {
  color: var(--muted);
  font-size: 13px;
}

.chapter-list {
  border-left: 1px solid var(--line);
}

.chapter-card {
  display: grid;
  grid-template-columns: 62px minmax(0, 0.8fr) minmax(220px, 1fr) auto;
  gap: 20px;
  align-items: center;
  min-height: 112px;
  padding: 20px 0 20px 28px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.chapter-card:hover,
.chapter-card:focus-visible {
  background: rgba(203, 138, 61, 0.13);
}

.chapter-card .chapter-number {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 12px;
}

.chapter-card h4 {
  margin: 0;
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.08;
}

.chapter-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.chapter-card .open-mark {
  padding-right: 18px;
  font-size: 22px;
}

.web-principle {
  max-width: 900px;
  padding-bottom: clamp(100px, 14vw, 190px);
}

.web-principle > p:last-child {
  max-width: 700px;
  margin-top: 30px;
}

.resume-reading {
  display: inline-flex;
  flex-direction: column;
  margin-top: 30px;
  padding: 15px 20px;
  border-left: 3px solid var(--coral);
  background: rgba(255, 253, 248, 0.72);
  text-decoration: none;
}

.resume-reading[hidden] {
  display: none;
}

.resume-reading span {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.resume-reading strong {
  margin-top: 4px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 500;
}

.book-search-section {
  display: grid;
  grid-template-columns: minmax(240px, 0.55fr) minmax(320px, 1fr);
  gap: 40px 70px;
  padding-block: clamp(72px, 9vw, 120px);
  border-bottom: 1px solid var(--line);
}

.book-search-section h2 {
  max-width: 450px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 5vw, 70px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.96;
}

.book-search-box {
  align-self: end;
}

.book-search-box label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.book-search-box input,
.web-toc-head input {
  width: 100%;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--surface);
  color: var(--ink);
  outline: 0;
}

.book-search-box input {
  height: 62px;
  padding: 0 20px;
  font-family: var(--serif);
  font-size: 19px;
}

.book-search-box input:focus,
.web-toc-head input:focus {
  border-color: var(--coral);
  box-shadow: 0 0 0 3px rgba(185, 74, 47, 0.14);
}

#book-search-status {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.book-search-results {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.book-search-result {
  display: flex;
  flex-direction: column;
  min-height: 180px;
  padding: 24px;
  background: var(--surface);
  text-decoration: none;
}

.book-search-result:hover,
.book-search-result:focus-visible {
  background: #f0dfc4;
}

.book-search-result span {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.07em;
}

.book-search-result strong {
  margin-top: 9px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.12;
}

.book-search-result p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.opening-part {
  margin-bottom: 76px;
}

/* Native HTML reader */

.native-reader-page {
  background: var(--surface);
}

.native-reader-page::before {
  opacity: 0.7;
}

.reading-progress {
  position: fixed;
  z-index: 200;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: rgba(23, 33, 31, 0.08);
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left center;
}

.reading-site-header {
  z-index: 90;
}

.web-toc-toggle {
  display: none;
  margin-left: auto;
  padding: 0 20px;
  border: 0;
  border-left: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.web-reader-shell {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  align-items: start;
}

.web-reader-toc {
  position: sticky;
  top: 82px;
  height: calc(100vh - 82px);
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: #eee5d3;
  scrollbar-color: rgba(23, 33, 31, 0.28) transparent;
  scrollbar-width: thin;
}

.web-toc-head {
  position: sticky;
  z-index: 2;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  padding: 24px 20px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(238, 229, 211, 0.96);
  backdrop-filter: blur(12px);
}

.web-toc-head div {
  display: flex;
  flex-direction: column;
}

.web-toc-head span,
.web-toc-head label {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.09em;
}

.web-toc-head strong {
  margin-top: 3px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
}

.web-toc-head button {
  display: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 9px;
}

.web-toc-head label {
  grid-column: 1 / -1;
  margin-top: 17px;
  color: var(--muted);
}

.web-toc-head input {
  grid-column: 1 / -1;
  height: 38px;
  margin-top: 6px;
  padding: 0 10px;
  font-size: 11px;
}

.web-on-this-page {
  padding: 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.6);
}

.web-on-this-page p,
.web-toc-part {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.web-on-this-page a {
  display: block;
  margin-top: 9px;
  color: var(--muted);
  font-family: var(--serif);
  font-size: 12px;
  line-height: 1.25;
  text-decoration: none;
}

.web-on-this-page a:hover,
.web-on-this-page a.active {
  color: var(--coral);
}

.web-toc-part {
  padding: 19px 20px 8px;
}

.web-toc-entry {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 7px;
  padding: 10px 20px;
  border-bottom: 1px solid rgba(23, 33, 31, 0.1);
  text-decoration: none;
}

.web-toc-entry[hidden],
.web-toc-group[hidden] {
  display: none;
}

.web-toc-entry span {
  padding-top: 2px;
  color: var(--coral);
  font-family: var(--mono);
  font-size: 8px;
}

.web-toc-entry strong {
  font-size: 10px;
  font-weight: 600;
  line-height: 1.35;
}

.web-toc-entry:hover,
.web-toc-entry.active {
  background: rgba(203, 138, 61, 0.19);
}

.web-toc-entry.active {
  box-shadow: inset 3px 0 0 var(--coral);
}

.web-reader-main {
  min-width: 0;
}

.native-chapter {
  width: min(100%, 1080px);
  margin-inline: auto;
  padding: clamp(60px, 7vw, 112px) clamp(36px, 7vw, 120px) 70px;
}

.chapter-masthead {
  max-width: 820px;
  margin-bottom: clamp(60px, 8vw, 110px);
  padding-bottom: 38px;
  border-bottom: 2px solid var(--ink);
}

.chapter-masthead h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(52px, 6.2vw, 92px);
  font-weight: 500;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

.chapter-question {
  max-width: 680px;
  margin: 28px 0 0;
  color: var(--muted);
  font-family: var(--book-serif);
  font-size: 20px;
  font-style: italic;
  line-height: 1.45;
}

.chapter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 24px;
  margin-top: 34px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.075em;
}

.language-switcher {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 22px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 253, 248, 0.78);
  box-shadow: 0 8px 24px rgba(37, 31, 24, 0.06);
}

.language-switcher > span {
  padding: 0 8px 0 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.09em;
}

.language-switcher button {
  min-height: 34px;
  padding: 0 13px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
}

.language-switcher button:hover {
  background: rgba(199, 80, 42, 0.08);
}

.language-switcher button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.localized-layer,
.language-layer {
  display: none;
}

body[data-language-mode="en"] .localized-layer[data-language="en"],
body[data-language-mode="ja"] .localized-layer[data-language="ja"],
body[data-language-mode="zh"] .localized-layer[data-language="zh"] {
  display: inline;
}

body[data-language-mode="en"] .language-layer[data-language="en"],
body[data-language-mode="ja"] .language-layer[data-language="ja"],
body[data-language-mode="zh"] .language-layer[data-language="zh"],
.language-layer.language-shared {
  display: block;
}

body[data-language-mode="all"] .localized-layer[data-language="en"] {
  display: initial;
}

body[data-language-mode="all"] .chapter-masthead .localized-layer {
  display: block;
}

body[data-language-mode="all"] .language-layer:not(.language-shared) {
  display: block;
}

.aligned-block {
  scroll-margin-top: 110px;
}

.language-ja,
[lang="ja"] {
  font-family: "Noto Serif CJK JP", "Noto Serif JP", "Yu Mincho", serif;
}

.language-zh,
[lang="zh"] {
  font-family: "Noto Serif CJK SC", "Noto Serif SC", "Songti SC", serif;
}

.language-ja,
.language-zh {
  line-height: 2.05;
}

ruby {
  ruby-align: center;
  ruby-position: over;
}

rt {
  color: #66706a;
  font-family: "Public Sans", sans-serif;
  font-size: 0.47em;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1;
}

body[data-language-mode="all"] .chapter-masthead h1 .localized-layer + .localized-layer {
  margin-top: 0.22em;
  font-size: 0.54em;
  line-height: 1.18;
}

body[data-language-mode="all"] .chapter-question .localized-layer + .localized-layer {
  margin-top: 0.45em;
  font-size: 0.82em;
  font-style: normal;
  line-height: 1.8;
}

body[data-language-mode="all"] .aligned-block:not(.aligned-header):not(.aligned-shared):not(.aligned-figure) {
  margin: 2.15em 0;
  padding: 1.15em 1.25em 0.2em;
  border: 1px solid rgba(154, 120, 61, 0.22);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(255, 253, 248, 0.88), rgba(243, 239, 228, 0.55));
}

body[data-language-mode="all"] .language-layer:not(.language-shared)::before {
  display: block;
  margin-bottom: 0.58em;
  color: var(--coral);
  content: attr(data-label);
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1;
}

body[data-language-mode="all"] .language-layer + .language-layer {
  margin-top: 1.3em;
  padding-top: 1.25em;
  border-top: 1px solid rgba(154, 120, 61, 0.18);
}

body[data-language-mode="all"] .aligned-header .language-layer + .language-layer {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

body[data-language-mode="all"] .aligned-header .language-ja h2,
body[data-language-mode="all"] .aligned-header .language-zh h2 {
  margin-top: 0.65em;
  font-size: clamp(24px, 2.5vw, 35px);
  line-height: 1.35;
}

.figure-caption-translations {
  margin-top: 0.75em;
}

.translated-caption {
  display: none;
  margin: 0.55em 0 0 !important;
  color: var(--muted);
  font-size: 0.86em;
  line-height: 1.8;
}

.translated-caption strong {
  margin-right: 0.45em;
  color: var(--coral);
  font-family: var(--mono);
  font-size: 0.72em;
  letter-spacing: 0.08em;
}

body[data-language-mode="ja"] .aligned-figure figcaption,
body[data-language-mode="zh"] .aligned-figure figcaption {
  display: none;
}

body[data-language-mode="ja"] .translated-caption[data-language="ja"],
body[data-language-mode="zh"] .translated-caption[data-language="zh"],
body[data-language-mode="all"] .translated-caption {
  display: block;
}

.chapter-body {
  max-width: 760px;
  color: #222825;
  font-family: var(--book-serif);
  font-size: clamp(18px, 1.45vw, 20px);
  line-height: 1.82;
  text-wrap: pretty;
}

.chapter-body > p:first-child {
  font-size: 1.1em;
  line-height: 1.68;
}

.chapter-body > .aligned-block:first-child .language-layer > p:first-child {
  font-size: 1.1em;
  line-height: 1.68;
}

.chapter-body p {
  margin: 0 0 1.16em;
}

.chapter-body h2 {
  margin: 3.2em 0 0.85em;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(32px, 3.3vw, 47px);
  font-weight: 500;
  letter-spacing: -0.038em;
  line-height: 1.04;
  scroll-margin-top: 110px;
}

.chapter-body h2::before {
  display: block;
  width: 42px;
  height: 3px;
  margin-bottom: 20px;
  background: var(--coral);
  content: "";
}

.chapter-body strong {
  color: var(--ink);
  font-weight: 700;
}

.chapter-body a {
  color: #8f321f;
  text-decoration-color: rgba(143, 50, 31, 0.38);
  text-underline-offset: 0.16em;
}

.chapter-body ol,
.chapter-body ul {
  margin: 1.4em 0 1.7em;
  padding-left: 1.45em;
}

.chapter-body li {
  margin: 0.52em 0;
  padding-left: 0.22em;
}

.chapter-body li::marker {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 0.78em;
}

.chapter-body li > p {
  margin: 0;
}

.chapter-body blockquote {
  margin: 2.2em 0;
  padding: 0.2em 0 0.2em 1.4em;
  border-left: 4px solid var(--gold);
  color: #3e443f;
  font-size: 1.06em;
  font-style: italic;
}

.chapter-body blockquote p:last-child {
  margin-bottom: 0;
}

.chapter-body .math.display {
  display: block;
  max-width: 100%;
  margin: 1.8em 0;
  padding: 0.8em 0;
  overflow-x: auto;
  overflow-y: hidden;
  color: var(--ink);
  text-align: center;
  scrollbar-color: rgba(23, 33, 31, 0.25) transparent;
  scrollbar-width: thin;
}

.chapter-body mjx-container[jax="CHTML"][display="true"] {
  margin: 0 !important;
  min-width: max-content;
}

.chapter-body figure {
  width: min(930px, calc(100vw - 390px));
  margin: 3.6em 0 3.8em;
}

.chapter-body figure img {
  width: 100%;
  border: 1px solid rgba(23, 33, 31, 0.2);
  box-shadow: 0 20px 55px rgba(23, 33, 31, 0.16);
}

.chapter-body figcaption {
  max-width: 720px;
  margin-top: 13px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 11px;
  line-height: 1.5;
}

.chapter-body .center {
  max-width: 100%;
  margin: 2.2em 0;
  overflow-x: auto;
}

.chapter-body table {
  width: 100%;
  min-width: 580px;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.48;
}

.chapter-body th,
.chapter-body td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.chapter-body th {
  border-top: 2px solid var(--ink);
  background: #eee5d3;
}

.chapter-end {
  max-width: 760px;
  margin-top: 72px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.chapter-end a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 30px;
  align-items: center;
  padding: 28px;
  background: var(--forest);
  color: white;
  text-decoration: none;
}

.chapter-end span {
  grid-column: 1;
  color: #e9b36c;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.chapter-end strong {
  grid-column: 1;
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 500;
  line-height: 1.1;
}

.chapter-end b {
  grid-column: 2;
  grid-row: 1 / 3;
  font-size: 30px;
  font-weight: 400;
}

.chapter-end a:hover,
.chapter-end a:focus-visible {
  background: var(--coral);
}

.chapter-pagination {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: stretch;
  border-block: 1px solid var(--line);
  background: var(--paper);
}

.chapter-nav-link {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 112px;
  padding: 22px clamp(20px, 4vw, 52px);
  text-decoration: none;
}

.chapter-nav-link.next {
  text-align: right;
}

.chapter-nav-link span,
.chapter-map-link {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.chapter-nav-link strong {
  margin-top: 5px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.15;
}

.chapter-nav-link:hover,
.chapter-nav-link:focus-visible {
  background: rgba(203, 138, 61, 0.18);
}

.chapter-map-link {
  display: flex;
  align-items: center;
  padding: 0 28px;
  border-inline: 1px solid var(--line);
  text-decoration: none;
}

.web-reader-footer {
  padding-inline: clamp(24px, 4vw, 60px);
}

/* PDF reader */

.reader-page {
  height: 100vh;
  overflow: hidden;
  background: #d8d1c4;
}

.reader-page::before {
  display: none;
}

.reader-header {
  position: relative;
  z-index: 30;
  display: grid;
  grid-template-columns: 260px minmax(200px, 1fr) auto;
  height: 70px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  background: var(--forest);
  color: white;
}

.reader-brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 9px 22px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  font-family: var(--mono);
  text-decoration: none;
}

.reader-brand span {
  color: #e9b36c;
  font-size: 9px;
  letter-spacing: 0.12em;
}

.reader-brand strong {
  margin-top: 4px;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
}

.edition-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 24px;
}

.edition-switch label {
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.edition-switch select {
  min-width: 160px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 0;
  background: #254d46;
  color: white;
  padding: 0 34px 0 12px;
}

.reader-utilities {
  display: flex;
  align-items: stretch;
}

.language-edition-menu {
  position: relative;
  display: flex;
  align-items: stretch;
}

.language-edition-menu summary {
  display: flex;
  align-items: center;
  padding: 0 20px;
  color: white;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  list-style: none;
}

.language-edition-menu summary::-webkit-details-marker {
  display: none;
}

.language-edition-menu summary:hover,
.language-edition-menu[open] summary {
  background: var(--coral);
}

.language-edition-menu > div {
  position: absolute;
  z-index: 80;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  width: 260px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  background: #18332f;
  box-shadow: 0 18px 44px rgba(8, 20, 18, 0.3);
}

.language-edition-menu > div p {
  margin: 10px 8px 4px;
  color: rgba(255, 255, 255, 0.56);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.09em;
}

.reader-utilities .language-edition-menu > div a {
  min-height: 36px;
  padding: 8px;
  border-radius: 6px;
}

.reader-utilities a,
.reader-utilities button {
  display: flex;
  align-items: center;
  padding: 0 20px;
  border: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: white;
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
}

.reader-utilities a:hover,
.reader-utilities button:hover {
  background: var(--coral);
}

#outline-toggle {
  display: none;
}

.pdf-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  height: calc(100vh - 70px);
}

.reader-outline {
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background: var(--paper);
}

.outline-intro {
  padding: 28px 24px;
  border-bottom: 1px solid var(--line);
}

.outline-intro p {
  margin: 0;
  color: var(--coral);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.09em;
}

.outline-intro h1 {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
}

.toc-introduction,
.toc-chapter {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 8px;
  width: 100%;
  padding: 11px 20px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.toc-introduction:hover,
.toc-chapter:hover,
.toc-chapter.active,
.toc-introduction.active {
  background: rgba(203, 138, 61, 0.18);
}

.toc-number {
  color: var(--coral);
  font-family: var(--mono);
  font-size: 9px;
}

.toc-title {
  font-size: 11px;
  font-weight: 600;
  line-height: 1.35;
}

.toc-part {
  margin: 0;
  padding: 19px 20px 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
}

.pdf-stage {
  position: relative;
  min-width: 0;
  background: #cfc8bb;
}

.reader-status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 38px;
  padding: 0 16px;
  background: #f5f1e8;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.reader-status a {
  color: var(--coral);
  font-weight: 500;
}

#pdf-frame {
  display: block;
  width: 100%;
  height: calc(100% - 38px);
  border: 0;
  background: #cfc8bb;
}

.noscript {
  padding: 22px;
}

.reveal {
  animation: rise-in 620ms both cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal-mid {
  animation-delay: 100ms;
}

.reveal-late {
  animation-delay: 190ms;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr 0.78fr;
  }

  .hero h1 {
    font-size: clamp(68px, 10vw, 112px);
  }

  .part-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .part-card:last-child {
    grid-column: 1 / -1;
    min-height: 250px;
  }

  .chapter-card {
    grid-template-columns: 48px minmax(0, 0.8fr) minmax(180px, 1fr) auto;
  }

  .web-reader-shell {
    grid-template-columns: 290px minmax(0, 1fr);
  }

  .native-chapter {
    padding-inline: clamp(34px, 5vw, 72px);
  }

  .chapter-body figure {
    width: 100%;
  }
}

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

  .web-reader-shell {
    grid-template-columns: 1fr;
  }

  .web-reader-toc {
    position: fixed;
    z-index: 120;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(88vw, 360px);
    height: 100vh;
    box-shadow: 24px 0 70px rgba(23, 33, 31, 0.28);
    transform: translateX(-105%);
    transition: transform 220ms ease;
  }

  .web-reader-toc.open {
    transform: translateX(0);
  }

  .web-toc-head button {
    display: block;
  }

  body.contents-open {
    overflow: hidden;
  }

  body.contents-open::after {
    position: fixed;
    z-index: 110;
    inset: 0;
    background: rgba(16, 28, 26, 0.48);
    content: "";
  }
}

@media (max-width: 820px) {
  .site-header {
    position: sticky;
    top: 0;
    min-height: 68px;
  }

  .wordmark {
    min-width: 0;
    padding-inline: 20px;
    border-right: 0;
  }

  .menu-button {
    display: block;
    margin-left: auto;
    padding: 0 20px;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    flex-direction: column;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
  }

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

  .site-nav a {
    min-height: 52px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-deck,
  .subtitle {
    margin-inline: auto;
  }

  .hero-actions,
  .hero-facts {
    justify-content: center;
  }

  .hero-art {
    max-width: 520px;
    margin-inline: auto;
  }

  .question-band,
  .philosophy-grid,
  .web-progress {
    grid-template-columns: 1fr;
  }

  .question-band p + p,
  .philosophy-card + .philosophy-card,
  .web-progress div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .philosophy-card {
    min-height: 310px;
  }

  .philosophy-card h3 {
    margin-top: 48px;
  }

  .section-heading,
  .tension-section,
  .reader-panel,
  .method-section,
  .atlas-heading,
  .book-part {
    grid-template-columns: 1fr;
  }

  .book-search-section {
    grid-template-columns: 1fr;
  }

  .book-search-results {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .section-heading .eyebrow,
  .atlas-heading .eyebrow {
    margin-bottom: 0;
  }

  .tension-number {
    display: none;
  }

  .reader-panel {
    gap: 40px;
  }

  .book-part-heading {
    padding-right: 0;
  }

  .book-part-heading h3 {
    margin-top: 24px;
  }

  .chapter-list {
    border-left: 0;
  }

  .chapter-card {
    grid-template-columns: 40px minmax(0, 1fr) auto;
    padding-left: 0;
  }

  .chapter-card p {
    grid-column: 2 / -1;
  }

  .reader-header {
    grid-template-columns: minmax(150px, 1fr) auto;
  }

  .edition-switch {
    display: none;
  }

  .reader-utilities a:last-child {
    display: none;
  }

  #outline-toggle {
    display: flex;
  }

  .pdf-shell {
    position: relative;
    grid-template-columns: 1fr;
  }

  .reader-outline {
    position: absolute;
    z-index: 20;
    top: 0;
    bottom: 0;
    left: 0;
    display: none;
    width: min(88vw, 340px);
    box-shadow: 20px 0 60px rgba(0, 0, 0, 0.28);
  }

  .reader-outline.open {
    display: block;
  }

  .reading-site-header .site-nav {
    z-index: 100;
  }
}

@media (max-width: 560px) {
  .section-shell {
    width: min(100% - 28px, 1240px);
  }

  .hero {
    padding-top: 58px;
  }

  .hero h1,
  .web-book-hero h1 {
    font-size: clamp(58px, 20vw, 88px);
  }

  .subtitle {
    font-size: 28px;
  }

  .hero-facts div {
    min-width: 0;
    padding-right: 14px;
  }

  .hero-facts div + div {
    padding-left: 14px;
  }

  .hero-facts dt {
    font-size: 26px;
  }

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

  .part-card,
  .part-card:last-child {
    grid-column: auto;
    min-height: 260px;
  }

  .reader-panel {
    padding: 32px 24px;
  }

  .reader-links a {
    flex-direction: column;
    gap: 4px;
  }

  .reader-links span {
    text-align: left;
  }

  .site-footer {
    flex-direction: column;
  }

  .reader-header {
    height: 62px;
  }

  .reader-brand {
    padding-inline: 14px;
  }

  .reader-utilities a,
  .reader-utilities button {
    padding-inline: 13px;
  }

  .pdf-shell {
    height: calc(100vh - 62px);
  }

  .reader-status {
    height: 44px;
  }

  #pdf-frame {
    height: calc(100% - 44px);
  }

  .native-chapter {
    padding: 58px 20px 48px;
  }

  .chapter-masthead {
    margin-bottom: 58px;
    padding-bottom: 28px;
  }

  .chapter-masthead h1 {
    font-size: clamp(45px, 14vw, 68px);
  }

  .chapter-question {
    font-size: 18px;
  }

  .chapter-body {
    font-size: 17.5px;
    line-height: 1.78;
  }

  .chapter-body h2 {
    font-size: 34px;
  }

  .chapter-body .math.display {
    margin-inline: -8px;
    padding-inline: 8px;
    text-align: left;
  }

  .chapter-body figure {
    width: auto;
    margin: 3em -20px;
  }

  .chapter-body figcaption {
    padding-inline: 20px;
  }

  .chapter-end a {
    padding: 24px 20px;
  }

  .chapter-pagination {
    grid-template-columns: 1fr 1fr;
  }

  .chapter-map-link {
    grid-column: 1 / -1;
    grid-row: 1;
    justify-content: center;
    min-height: 50px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    border-left: 0;
  }

  .chapter-nav-link,
  .chapter-nav-spacer {
    grid-row: 2;
    min-height: 104px;
  }

  .chapter-nav-link strong {
    font-size: 14px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}