:root {
  --ink: #081927;
  --navy: #0b2133;
  --navy-2: #103550;
  --lake: #3e7c95;
  --sky: #87c0cf;
  --copper: #c35c32;
  --copper-dark: #9f4022;
  --amber: #e7a443;
  --cream: #f4ead7;
  --paper: #fbfaf6;
  --white: #ffffff;
  --muted: #5f6d76;
  --line: rgba(8, 25, 39, 0.16);
  --display: "Arial Black", "Arial Narrow", "Segoe UI", sans-serif;
  --body: "Aptos", "Segoe UI", Arial, sans-serif;
  --shadow: 0 26px 70px rgba(4, 17, 27, 0.18);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  max-width: 100%;
  overflow-x: hidden;
  color-scheme: light;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-width: 280px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 15%, rgba(135, 192, 207, 0.16), transparent 23rem),
    linear-gradient(180deg, #f8f5ec 0%, var(--paper) 58%, #efe8db 100%);
  font-family: var(--body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

h1,
h2,
h3,
.brand-copy strong,
.brand-copy small {
  margin-top: 0;
  overflow-wrap: normal;
  word-break: normal;
  hyphens: none;
  text-wrap: balance;
}

a {
  color: inherit;
}

button {
  font: inherit;
}

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

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: max(12px, env(safe-area-inset-top));
  left: max(12px, env(safe-area-inset-left));
  padding: 10px 16px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.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;
}

.shell {
  width: 100%;
  max-width: 1460px;
  margin-inline: auto;
  padding-right: max(20px, env(safe-area-inset-right));
  padding-left: max(20px, env(safe-area-inset-left));
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  padding-top: env(safe-area-inset-top);
  background: rgba(251, 250, 246, 0.96);
  border-bottom: 1px solid rgba(8, 25, 39, 0.1);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.header-accent {
  height: 5px;
  background: linear-gradient(90deg, var(--copper) 0 31%, var(--amber) 31% 42%, var(--lake) 42% 100%);
}

.header-inner {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 48px;
  aspect-ratio: 1;
  place-items: center;
  color: var(--cream);
  background: var(--navy);
  border-radius: 50% 50% 50% 9px;
  font-family: var(--display);
  font-size: 0.95rem;
  letter-spacing: -0.08em;
  transform: rotate(-3deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: 4px;
  bottom: 8px;
  width: 10px;
  height: 3px;
  background: var(--copper);
}

.brand-copy {
  min-width: 0;
  display: grid;
  line-height: 1.05;
}

.brand-copy strong {
  font-family: var(--display);
  font-size: 1.22rem;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand-copy small {
  margin-top: 6px;
  color: var(--copper-dark);
  font-size: 0.69rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(15px, 1.8vw, 32px);
}

.site-nav a {
  position: relative;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: 0.92rem;
  font-weight: 750;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav > a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav > a:hover::after,
.site-nav > a:focus-visible::after,
.site-nav > a.active::after {
  transform: scaleX(1);
}

.nav-cta {
  min-height: 46px;
  padding: 0 20px;
  justify-content: center;
  color: var(--white);
  background: var(--copper-dark);
  border-radius: 3px;
}

.nav-cta:hover {
  background: var(--ink);
}

.menu-button {
  display: none;
  width: 48px;
  height: 48px;
  padding: 12px;
  flex: 0 0 48px;
  border: 0;
  border-radius: 3px;
  color: var(--white);
  background: var(--navy);
  cursor: pointer;
}

.menu-button > span:not(.sr-only) {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-button[aria-expanded="true"] > span:nth-of-type(2) {
  transform: translateY(7px) rotate(45deg);
}

.menu-button[aria-expanded="true"] > span:nth-of-type(3) {
  opacity: 0;
}

.menu-button[aria-expanded="true"] > span:nth-of-type(4) {
  transform: translateY(-7px) rotate(-45deg);
}

.glance-main {
  padding: clamp(28px, 4.5vw, 64px) 0 clamp(56px, 7vw, 100px);
}

.glance-heading {
  max-width: 1220px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
  align-items: end;
  gap: 32px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.eyebrow,
.page-kicker {
  margin: 0 0 10px;
  color: var(--copper-dark);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  line-height: 1.3;
  text-transform: uppercase;
}

.glance-heading h1 {
  max-width: 16ch;
  margin-bottom: 0;
  font-family: var(--display);
  font-size: clamp(2.25rem, 5vw, 5.25rem);
  letter-spacing: -0.065em;
  line-height: 0.94;
  text-transform: uppercase;
}

.glance-heading > p {
  max-width: 58ch;
  margin: 0 0 4px;
  color: #40505a;
  font-size: clamp(0.98rem, 1.2vw, 1.12rem);
}

.glance-heading a {
  color: var(--copper-dark);
  font-weight: 800;
}

.book-region {
  max-width: 1220px;
}

.book-toolbar {
  min-height: 54px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  margin-bottom: 14px;
}

.book-button {
  min-width: 116px;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 16px;
  color: var(--white);
  background: var(--navy);
  border: 2px solid var(--navy);
  border-radius: 4px;
  font-size: 0.88rem;
  font-weight: 800;
  cursor: pointer;
}

.book-button:hover:not(:disabled) {
  color: var(--ink);
  background: var(--amber);
  border-color: var(--amber);
}

.book-button:disabled {
  color: #60707b;
  background: transparent;
  border-color: rgba(8, 25, 39, 0.25);
  cursor: not-allowed;
}

.page-status {
  margin: 0;
  overflow: hidden;
  color: #4c5b65;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-align: center;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.flipbook {
  position: relative;
  min-height: 660px;
  isolation: isolate;
  overflow: hidden;
  color: var(--ink);
  background: #e7dfd1;
  border: 1px solid rgba(8, 25, 39, 0.2);
  border-radius: 8px 20px 20px 8px;
  box-shadow: var(--shadow);
  outline: none;
  perspective: 2400px;
  touch-action: pan-y;
}

.flipbook:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 5px;
}

.book-spine {
  position: absolute;
  z-index: 9;
  top: 0;
  bottom: 0;
  left: 0;
  width: 16px;
  background: linear-gradient(90deg, rgba(8, 25, 39, 0.34), rgba(255, 255, 255, 0.42) 56%, transparent);
  pointer-events: none;
}

.book-page {
  position: relative;
  min-height: 660px;
  display: grid;
  align-content: center;
  gap: clamp(20px, 3vw, 38px);
  padding: clamp(36px, 5.4vw, 76px);
  overflow: hidden auto;
  background:
    linear-gradient(90deg, rgba(8, 25, 39, 0.055), transparent 4.5%),
    var(--paper);
  box-shadow: inset -22px 0 45px rgba(8, 25, 39, 0.035);
}

.js .book-page {
  position: absolute;
  inset: 0;
  min-height: 100%;
  display: none;
  transform-style: preserve-3d;
  backface-visibility: hidden;
}

.js .book-page.is-active,
.js .book-page.is-leaving {
  display: grid;
}

.js .book-page.is-active {
  z-index: 1;
}

.js .book-page.is-leaving {
  z-index: 3;
  pointer-events: none;
}

.js .book-page.is-leaving.turn-forward {
  transform-origin: left center;
  animation: turn-forward 520ms cubic-bezier(0.58, 0.02, 0.34, 0.98) both;
}

.js .book-page.is-leaving.turn-backward {
  transform-origin: right center;
  animation: turn-backward 520ms cubic-bezier(0.58, 0.02, 0.34, 0.98) both;
}

@keyframes turn-forward {
  0% { transform: rotateY(0deg); filter: brightness(1); }
  54% { box-shadow: 28px 0 46px rgba(8, 25, 39, 0.28); filter: brightness(0.88); }
  100% { transform: rotateY(-105deg); filter: brightness(0.72); }
}

@keyframes turn-backward {
  0% { transform: rotateY(0deg); filter: brightness(1); }
  54% { box-shadow: -28px 0 46px rgba(8, 25, 39, 0.28); filter: brightness(0.88); }
  100% { transform: rotateY(105deg); filter: brightness(0.72); }
}

.page-heading {
  max-width: 900px;
}

.page-heading h2,
.cover-copy h2,
.mosaic-copy h2 {
  max-width: 19ch;
  margin-bottom: 18px;
  font-family: var(--display);
  font-size: clamp(2rem, 4.25vw, 4.45rem);
  letter-spacing: -0.055em;
  line-height: 0.98;
  text-transform: uppercase;
}

.page-lead {
  max-width: 66ch;
  margin: 0;
  color: #344752;
  font-size: clamp(1.02rem, 1.55vw, 1.35rem);
  line-height: 1.45;
}

.folio {
  position: absolute;
  right: 28px;
  bottom: 20px;
  color: rgba(8, 25, 39, 0.48);
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.folio-light {
  color: rgba(255, 255, 255, 0.72);
}

.page-link {
  width: fit-content;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--copper-dark);
  font-weight: 850;
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

.page-link:hover {
  color: var(--ink);
}

.page-link-light {
  color: var(--white);
}

.page-link-light:hover {
  color: var(--amber);
}

.cover-page {
  grid-template-columns: minmax(260px, 0.74fr) minmax(320px, 1fr);
  align-items: center;
  padding: clamp(22px, 3.2vw, 46px) clamp(30px, 5vw, 74px);
  color: var(--white);
  background:
    radial-gradient(circle at 80% 16%, rgba(135, 192, 207, 0.3), transparent 23rem),
    linear-gradient(135deg, #071724, var(--navy-2) 58%, #173e52);
}

.cover-image-wrap {
  height: 568px;
  display: grid;
  place-items: center;
}

.cover-image-wrap img {
  max-height: 100%;
  width: auto;
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.4);
}

.cover-copy .page-kicker,
.mosaic-copy .page-kicker {
  color: var(--amber);
}

.cover-copy h2 {
  margin-bottom: 26px;
}

.cover-copy > p:not(.page-kicker, .gesture-hint) {
  max-width: 35ch;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(1rem, 1.6vw, 1.32rem);
}

.gesture-hint {
  margin: 38px 0 0;
  color: var(--cream);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.gesture-hint span {
  margin-right: 8px;
  color: var(--amber);
  font-size: 1.3rem;
}

.page-grid {
  display: grid;
  gap: 16px;
}

.page-grid.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.page-grid section {
  padding: clamp(18px, 2.5vw, 30px);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-top: 5px solid var(--lake);
}

.page-grid section:nth-child(2) {
  border-top-color: var(--copper);
}

.page-grid section:nth-child(3) {
  border-top-color: var(--amber);
}

.idea-icon {
  color: var(--copper-dark);
  font-family: var(--display);
  font-size: 1.75rem;
}

.page-grid h3,
.note-panel h3,
.culture-list h3,
.conversation-flow h3,
.everyday-grid h3,
.learning-layout h3,
.split-principles h3,
.action-columns h3 {
  margin: 8px 0 10px;
  font-family: var(--display);
  font-size: clamp(1.02rem, 1.5vw, 1.28rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
  text-transform: uppercase;
}

.page-grid p,
.note-panel p,
.culture-list p,
.conversation-flow p,
.everyday-grid p,
.split-principles p {
  margin: 0;
  color: #40505a;
  font-size: 0.95rem;
}

.economy-page {
  background:
    linear-gradient(120deg, rgba(62, 124, 149, 0.1), transparent 35%),
    linear-gradient(90deg, rgba(8, 25, 39, 0.055), transparent 4.5%),
    var(--paper);
}

.excellence-page {
  background:
    linear-gradient(135deg, rgba(231, 164, 67, 0.16), transparent 45%),
    var(--paper);
}

.pathway {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 4px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.pathway li {
  position: relative;
  min-height: 122px;
  display: grid;
  align-content: center;
  gap: 3px;
  padding: 20px 12px;
  color: var(--white);
  background: var(--navy);
  text-align: center;
}

.pathway li:not(:last-child)::after {
  content: "";
  position: absolute;
  z-index: 2;
  top: 50%;
  right: -11px;
  width: 22px;
  height: 22px;
  background: inherit;
  transform: translateY(-50%) rotate(45deg);
}

.pathway li:nth-child(2) { background: #174665; }
.pathway li:nth-child(3) { background: var(--lake); }
.pathway li:nth-child(4) { background: #b25a35; }
.pathway li:nth-child(5) { background: var(--copper-dark); }

.pathway span {
  position: relative;
  z-index: 3;
  color: var(--amber);
  font-size: 0.68rem;
  font-weight: 900;
}

.pathway strong,
.pathway small {
  position: relative;
  z-index: 3;
}

.pathway strong {
  font-family: var(--display);
  font-size: 0.9rem;
  text-transform: uppercase;
}

.pathway small {
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.72rem;
}

.note-panel {
  padding: 20px 24px;
  background: #fff9eb;
  border-left: 5px solid var(--amber);
}

.note-panel h3 {
  margin-top: 0;
}

.culture-page {
  color: var(--white);
  background:
    radial-gradient(circle at 83% 20%, rgba(231, 164, 67, 0.25), transparent 22rem),
    linear-gradient(135deg, #101f2c 0%, #173f54 54%, #205b6d 100%);
}

.culture-page .page-kicker,
.culture-page .page-link {
  color: var(--amber);
}

.culture-page .page-lead,
.culture-page .culture-list p {
  color: rgba(255, 255, 255, 0.8);
}

.culture-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.culture-list section {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 23px;
  background: rgba(4, 17, 27, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.culture-list section > span {
  color: var(--amber);
  font-family: var(--display);
  font-size: 1.85rem;
}

.culture-list h3 {
  margin-top: 0;
}

.culture-page blockquote,
.action-page blockquote {
  max-width: 55ch;
  margin: 0;
  padding-left: 22px;
  border-left: 4px solid var(--amber);
  font-size: clamp(1rem, 1.45vw, 1.25rem);
  font-weight: 700;
}

.listening-page {
  background:
    linear-gradient(145deg, rgba(62, 124, 149, 0.14), transparent 50%),
    var(--paper);
}

.conversation-flow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.conversation-flow section {
  position: relative;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
}

.conversation-flow section:not(:last-child)::after {
  content: "→";
  position: absolute;
  top: 50%;
  right: -23px;
  color: var(--copper);
  font-family: var(--display);
  font-size: 1.4rem;
  transform: translateY(-50%);
}

.conversation-flow span {
  color: var(--copper-dark);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.plain-language {
  max-width: 74ch;
  margin: 0;
  padding: 18px 22px;
  color: #31444f;
  background: rgba(135, 192, 207, 0.16);
  border-left: 4px solid var(--lake);
}

.everyday-page {
  background:
    linear-gradient(145deg, rgba(195, 92, 50, 0.1), transparent 44%),
    var(--paper);
}

.everyday-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.everyday-grid section {
  min-height: 130px;
  padding: 22px 24px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-left: 5px solid var(--copper);
}

.everyday-grid section:nth-child(2),
.everyday-grid section:nth-child(4) {
  border-left-color: var(--lake);
}

.everyday-grid h3 {
  margin-top: 0;
}

.learning-page {
  background:
    radial-gradient(circle at 13% 80%, rgba(135, 192, 207, 0.19), transparent 21rem),
    var(--paper);
}

.learning-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.52fr) minmax(0, 1fr);
  align-items: center;
  gap: clamp(30px, 5vw, 70px);
}

.learning-ring {
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 18px;
  background: rgba(62, 124, 149, 0.13);
  border: 2px solid var(--lake);
  border-radius: 50%;
  transform: rotate(-3deg);
}

.learning-ring span {
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--navy);
  font-family: var(--display);
  font-size: clamp(0.72rem, 1.1vw, 1rem);
  text-transform: uppercase;
}

.learning-ring span:nth-child(1) { border-radius: 100% 8px 8px 8px; }
.learning-ring span:nth-child(2) { border-radius: 8px 100% 8px 8px; background: var(--lake); }
.learning-ring span:nth-child(3) { border-radius: 8px 8px 8px 100%; background: var(--copper); }
.learning-ring span:nth-child(4) { border-radius: 8px 8px 100% 8px; background: var(--amber); color: var(--ink); }

.learning-layout h3 {
  margin-top: 0;
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 30px;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--copper-dark);
  font-weight: 900;
}

.fairness-page {
  color: var(--white);
  background: linear-gradient(135deg, #0b2133 0%, #15425d 100%);
}

.fairness-page .page-kicker,
.fairness-page .page-link {
  color: var(--amber);
}

.split-principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.split-principles section {
  padding: clamp(24px, 3vw, 38px);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.split-principles p {
  color: rgba(255, 255, 255, 0.8);
}

.split-principles p + p {
  margin-top: 12px;
}

.principle-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--ink);
  background: var(--amber);
  border-radius: 50%;
  font-family: var(--display);
  font-size: 1.25rem;
}

.paired-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 36px;
}

.public-risk-note {
  margin: 0;
  padding: 15px 18px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.07);
  border-left: 4px solid var(--amber);
  font-size: 0.9rem;
  line-height: 1.5;
}

.public-risk-note strong {
  color: var(--white);
}

.action-page {
  background:
    linear-gradient(135deg, rgba(231, 164, 67, 0.13), transparent 42%),
    var(--paper);
}

.action-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.action-columns section {
  padding: 24px 30px;
  background: var(--white);
  border: 1px solid var(--line);
}

.action-columns h3 {
  margin-top: 0;
  color: var(--copper-dark);
}

.action-columns ul {
  display: grid;
  gap: 7px;
  padding-left: 20px;
  margin: 0;
}

.action-page blockquote {
  border-left-color: var(--copper);
}

.mosaic-page {
  grid-template-columns: minmax(300px, 0.62fr) minmax(0, 1fr);
  align-items: center;
  color: var(--white);
  background:
    radial-gradient(circle at 14% 13%, rgba(62, 205, 196, 0.15), transparent 22rem),
    linear-gradient(135deg, #081927 0%, #0d2e3d 62%, #114555 100%);
}

.mosaic-copy h2 {
  margin-bottom: 24px;
}

.mosaic-copy > p:not(.page-kicker) {
  color: rgba(255, 255, 255, 0.82);
}

.mosaic-caveat {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.08);
  border-left: 4px solid #57d6ce;
}

.mosaic-map {
  margin: 0;
  overflow: hidden;
  background: #eee9df;
  border: 1px solid rgba(255, 255, 255, 0.23);
  border-radius: 5px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.3);
}

.mosaic-map img {
  width: 100%;
  height: auto;
}

.mosaic-map figcaption {
  padding: 12px 16px;
  color: #344752;
  background: #f4efe5;
  font-size: 0.72rem;
  line-height: 1.4;
}

.book-footer-controls {
  display: grid;
  grid-template-columns: minmax(120px, 0.42fr) minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px;
  margin-top: 18px;
  color: #51606a;
  font-size: 0.78rem;
}

.book-footer-controls p {
  margin: 0;
  text-align: center;
}

.book-footer-controls > a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--copper-dark);
  font-weight: 850;
}

.progress-track {
  height: 5px;
  overflow: hidden;
  background: rgba(8, 25, 39, 0.16);
  border-radius: 99px;
}

.progress-track span {
  display: block;
  width: 10%;
  height: 100%;
  background: linear-gradient(90deg, var(--copper), var(--amber));
  border-radius: inherit;
  transition: width 260ms ease;
}

.noscript-note {
  margin: 26px 0 0;
  padding: 16px 20px;
  background: #fff2cd;
  border-left: 4px solid var(--amber);
}

.no-js .book-toolbar,
.no-js .book-footer-controls,
.no-js .book-spine {
  display: none;
}

.no-js .flipbook {
  display: grid;
  gap: 30px;
  overflow: visible;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.no-js .book-page {
  min-height: 620px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.site-footer {
  padding: 28px 0 max(28px, env(safe-area-inset-bottom));
  color: rgba(255, 255, 255, 0.76);
  background: var(--ink);
}

.site-footer .shell {
  max-width: 1220px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-footer p {
  margin: 0;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 24px;
}

.site-footer a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (max-width: 1120px) {
  .js .menu-button {
    display: block;
  }

  .header-inner {
    position: relative;
  }

  .no-js .header-inner {
    flex-wrap: wrap;
    padding-bottom: 12px;
  }

  .no-js .site-nav {
    width: 100%;
    overflow-x: auto;
  }

  .js .site-nav {
    position: fixed;
    z-index: 101;
    top: calc(91px + env(safe-area-inset-top));
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    align-content: start;
    align-items: stretch;
    gap: 0;
    padding: 24px max(20px, env(safe-area-inset-right)) max(30px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
    overflow-y: auto;
    background: var(--paper);
  }

  .js .site-nav.is-open {
    display: grid;
  }

  .js .site-nav a {
    min-height: 58px;
    padding: 0 12px;
    border-bottom: 1px solid var(--line);
    font-size: 1.05rem;
  }

  .js .site-nav .nav-cta {
    margin-top: 18px;
    border: 0;
  }
}

@media (max-width: 900px) {
  .glance-heading {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .flipbook,
  .book-page {
    min-height: 700px;
  }

  .cover-page,
  .mosaic-page {
    grid-template-columns: minmax(220px, 0.7fr) minmax(280px, 1fr);
  }

  .cover-image-wrap {
    height: 540px;
  }

  .page-grid.three-up,
  .culture-list {
    grid-template-columns: 1fr;
  }

  .page-grid section,
  .culture-list section {
    padding: 16px 20px;
  }

  .page-grid section {
    border-top-width: 3px;
  }

  .culture-list section {
    grid-template-columns: 36px 1fr;
  }

  .page-grid h3,
  .culture-list h3 {
    margin-block: 3px 6px;
  }

  .pathway {
    grid-template-columns: repeat(5, minmax(92px, 1fr));
    overflow-x: auto;
    padding: 0 4px 8px;
  }

  .pathway li {
    min-height: 112px;
  }
}

@media (max-width: 720px) {
  .shell {
    padding-right: max(15px, env(safe-area-inset-right));
    padding-left: max(15px, env(safe-area-inset-left));
  }

  .header-inner {
    min-height: 76px;
  }

  .brand-mark {
    width: 42px;
  }

  .brand-copy strong {
    font-size: 1rem;
  }

  .brand-copy small {
    font-size: 0.58rem;
  }

  .js .site-nav {
    top: calc(81px + env(safe-area-inset-top));
  }

  .glance-main {
    padding-top: 30px;
  }

  .glance-heading h1 {
    font-size: clamp(2.1rem, 13vw, 3.45rem);
  }

  .book-toolbar {
    grid-template-columns: 52px minmax(0, 1fr) 52px;
    gap: 8px;
  }

  .book-button {
    min-width: 52px;
    width: 52px;
    padding: 0;
  }

  .book-button span:not([aria-hidden="true"]) {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .page-status {
    font-size: 0.68rem;
    letter-spacing: 0.035em;
  }

  .flipbook,
  .book-page {
    min-height: 680px;
  }

  .flipbook {
    border-radius: 5px 12px 12px 5px;
  }

  .book-page {
    align-content: start;
    gap: 20px;
    padding: 34px 26px 52px;
  }

  .cover-page,
  .mosaic-page {
    grid-template-columns: 1fr;
  }

  .cover-image-wrap {
    height: 390px;
  }

  .cover-copy h2 {
    margin-bottom: 12px;
    font-size: clamp(1.75rem, 9vw, 2.65rem);
  }

  .cover-copy > p:not(.page-kicker, .gesture-hint) {
    margin-bottom: 0;
    font-size: 0.96rem;
  }

  .gesture-hint {
    margin-top: 14px;
  }

  .page-heading h2,
  .mosaic-copy h2 {
    margin-bottom: 12px;
    font-size: clamp(1.75rem, 9.5vw, 2.8rem);
  }

  .page-lead {
    font-size: 1rem;
  }

  .page-grid.three-up,
  .culture-list,
  .conversation-flow,
  .everyday-grid,
  .split-principles,
  .action-columns,
  .learning-layout {
    grid-template-columns: 1fr;
  }

  .conversation-flow {
    gap: 10px;
  }

  .conversation-flow section {
    padding: 16px 20px;
  }

  .conversation-flow section:not(:last-child)::after {
    content: "↓";
    top: auto;
    right: 50%;
    bottom: -19px;
    transform: translateX(50%);
  }

  .everyday-grid section {
    min-height: auto;
    padding: 16px 20px;
  }

  .learning-ring {
    width: min(230px, 76%);
    margin-inline: auto;
  }

  .split-principles section,
  .action-columns section {
    padding: 20px;
  }

  .mosaic-page {
    align-content: start;
  }

  .mosaic-copy > p {
    font-size: 0.94rem;
  }

  .mosaic-map {
    margin-top: 2px;
  }

  .book-footer-controls {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .book-footer-controls p {
    order: 3;
    text-align: left;
  }

  .site-footer .shell {
    display: grid;
  }
}

@media (max-width: 420px) {
  .brand-copy small {
    max-width: 180px;
    white-space: normal;
  }

  .flipbook,
  .book-page {
    min-height: 650px;
  }

  .book-page {
    padding: 30px 20px 48px;
  }

  .cover-image-wrap {
    height: 338px;
  }

  .gesture-hint {
    font-size: 0.7rem;
  }

  .pathway {
    grid-template-columns: repeat(5, 100px);
  }

  .folio {
    right: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (forced-colors: active) {
  .book-page,
  .page-grid section,
  .conversation-flow section,
  .everyday-grid section,
  .split-principles section,
  .action-columns section {
    border: 1px solid CanvasText;
  }

  .progress-track span,
  .header-accent {
    background: Highlight;
  }
}

@media print {
  .site-header,
  .book-toolbar,
  .book-footer-controls,
  .site-footer,
  .book-spine,
  .glance-heading > p {
    display: none !important;
  }

  body {
    background: white;
  }

  .glance-main {
    padding: 0;
  }

  .flipbook,
  .js .flipbook {
    display: block;
    overflow: visible;
    background: white;
    border: 0;
    box-shadow: none;
  }

  .book-page,
  .js .book-page,
  .js .book-page.is-active {
    position: relative !important;
    inset: auto !important;
    min-height: 95vh;
    display: grid !important;
    break-after: page;
    box-shadow: none;
  }
}