/* Design tokens: book-cover duotone (matte parchment + espresso ink) + editorial UI */
:root {
  --color-parchment: #e8d4bc;
  --color-parchment-mid: #dec0a1;
  --color-parchment-deep: #cfae88;
  --color-parchment-soft: #f2e8d8;
  --color-ink-cover: #3e2b1e;
  --color-ink-cover-muted: rgba(62, 43, 30, 0.78);

  --color-offwhite: var(--color-parchment-soft);
  --color-brown: var(--color-ink-cover);
  --color-highlight-bg: #cdb896;
  --color-paper: var(--color-parchment-soft);
  --color-paper-mid: var(--color-parchment);
  --color-sand: var(--color-parchment);
  --color-tan: var(--color-ink-cover);
  --color-tan-deep: var(--color-ink-cover);
  --color-ink: var(--color-ink-cover);
  --color-ink-soft: #5c4536;
  --color-white: #fffef9;
  --color-shadow: rgba(22, 18, 14, 0.1);
  --color-shadow-deep: rgba(12, 10, 8, 0.38);
  --shadow-xs: 0 1px 2px rgba(22, 18, 14, 0.04);
  --shadow-sm: 0 4px 16px rgba(22, 18, 14, 0.07);
  --shadow-md: 0 12px 36px rgba(22, 18, 14, 0.1);
  --shadow-lg: 0 22px 56px rgba(22, 18, 14, 0.12);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.72);
  --font-serif: "Cormorant Garamond", "Georgia", serif;
  --font-sans: "Outfit", system-ui, sans-serif;
  --radius-lg: 20px;
  --radius-xl: 26px;
  --radius-full: 999px;
  --header-h: 80px;
  /* Same content width as hero + header (centered band across the page) */
  --container: min(1400px, calc(100% - clamp(1.35rem, 4.5vw, 3.25rem)));
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.3, 0.64, 1);
  --scroll-pad: 5.75rem;
  /* Section bands = cover field (aliases keep layout rules working; not navy) */
  --color-navy: var(--color-parchment-mid);
  --color-navy-deep: #2d2118;
  --color-on-navy: var(--color-ink-cover);
  --color-on-navy-muted: var(--color-ink-cover-muted);
  --color-navy-border: rgba(62, 43, 30, 0.14);
}

#top,
#book,
#book-details,
#quote,
#highlights,
#thesis,
#inside,
#facts,
#scope,
#author,
#contents,
#depth,
#faq,
#contact {
  scroll-margin-top: var(--scroll-pad);
}

@media (max-width: 899px) {
  :root {
    --scroll-pad: 6.25rem;
  }
}

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

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.32vw + 0.94rem, 1.08rem);
  font-weight: 400;
  line-height: 1.62;
  letter-spacing: 0.01em;
  color: var(--color-ink);
  background-color: var(--color-offwhite);
  background-image: none;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  width: calc(var(--scroll-progress, 0) * 1%);
  height: 3px;
  background: linear-gradient(90deg, var(--color-navy-deep), color-mix(in srgb, var(--color-ink-cover) 55%, #8b6f52));
  box-shadow: 0 0 14px color-mix(in srgb, var(--color-ink-cover) 28%, transparent);
  transition: width 0.08s linear;
  pointer-events: none;
}

::selection {
  background: color-mix(in srgb, var(--color-tan) 45%, transparent);
  color: var(--color-ink);
}

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

main {
  display: block;
}

body.nav-open {
  overflow: hidden;
  touch-action: none;
}

@media (min-width: 900px) {
  body.nav-open {
    overflow: unset;
    touch-action: unset;
  }
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.65rem 1rem;
  background: var(--color-ink);
  color: var(--color-paper);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 10px;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease-out);
}

.skip-link:focus {
  transform: translateY(0);
  outline: 2px solid var(--color-tan);
  outline-offset: 3px;
}

.page-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  opacity: 0.038;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='280' height='280'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid color-mix(in srgb, var(--color-ink) 7%, transparent);
  background: color-mix(in srgb, var(--color-white) 78%, transparent);
  backdrop-filter: saturate(165%) blur(20px);
  transition: box-shadow 0.35s var(--ease-out), border-color 0.35s ease, background 0.35s ease;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: var(--color-brown);
  opacity: 0.35;
  pointer-events: none;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: color-mix(in srgb, var(--color-ink) 6%, transparent);
  background: color-mix(in srgb, var(--color-white) 88%, transparent);
}

.site-header.is-scrolled .nav-shell {
  background: color-mix(in srgb, var(--color-white) 82%, transparent);
  border-color: color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-xs);
}

.site-header__ribbon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  width: var(--container);
  margin: 0 auto;
  padding: 0;
  height: 5px;
}

.site-header__ribbon-line {
  flex: 1;
  height: 2px;
  max-width: min(200px, 28vw);
  background: var(--color-brown);
  border-radius: 2px;
  opacity: 0.35;
}

.site-header__ribbon-line--flip {
  background: var(--color-brown);
  opacity: 0.35;
}

.site-header__ribbon-gem {
  width: 6px;
  height: 6px;
  margin: 0 10px;
  background: var(--color-offwhite);
  border: 1px solid color-mix(in srgb, var(--color-ink) 15%, transparent);
  transform: rotate(45deg);
  box-shadow: none;
  flex-shrink: 0;
}

.site-header__inner {
  width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0 0.85rem;
  min-height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  color: var(--color-ink);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.logo:hover {
  opacity: 0.92;
}

.logo:focus-visible {
  outline: 2px solid var(--color-tan-deep);
  outline-offset: 4px;
  border-radius: 12px;
}

.logo__emblem {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 4px 10px rgba(25, 18, 12, 0.12));
}

.logo__emblem-svg {
  display: block;
}

.logo__stack {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.logo__text {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.02rem, 0.35vw + 0.94rem, 1.22rem);
  letter-spacing: 0.03em;
  line-height: 1.15;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logo__tagline {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
  opacity: 0.92;
}

@media (max-width: 420px) {
  .logo__tagline {
    letter-spacing: 0.12em;
    font-size: 0.58rem;
  }
}

.nav-shell {
  display: none;
  align-items: center;
  padding: 0.22rem 0.3rem 0.22rem 1rem;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-white) 62%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-xs), var(--shadow-inset);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

@media (min-width: 900px) {
  .nav-shell {
    display: flex;
  }
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(0.55rem, 1.35vw, 1.2rem);
  font-size: 0.845rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav a {
  color: var(--color-ink-soft);
  text-decoration: none;
  position: relative;
  padding: 0.35rem 0;
}

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

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-tan-deep);
  transition: width 0.28s var(--ease-out);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  width: 100%;
}

.nav__cta {
  margin-left: 0.15rem;
  padding: 0.48rem 1.15rem !important;
  border-radius: var(--radius-full);
  background: var(--color-brown);
  color: var(--color-offwhite) !important;
  box-shadow: none;
  transition: transform 0.22s var(--ease-out), box-shadow 0.22s var(--ease-out);
}

.nav__cta::after {
  display: none;
}

.nav__cta:hover {
  color: var(--color-paper) !important;
  transform: translateY(-1px);
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--color-ink) 10%, transparent);
  border-radius: 12px;
  background: color-mix(in srgb, var(--color-white) 78%, transparent);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  color: var(--color-ink);
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-tan-deep);
  outline-offset: 2px;
}

.nav-toggle__bar {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s var(--ease-out);
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s var(--ease-out), top 0.25s var(--ease-out);
}

.nav-toggle__bar::before {
  top: -6px;
}

.nav-toggle__bar::after {
  top: 6px;
}

.site-header.is-nav-open .nav-toggle__bar {
  background: transparent;
}

.site-header.is-nav-open .nav-toggle__bar::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header.is-nav-open .nav-toggle__bar::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-panel {
  flex-direction: column;
  gap: 0.2rem;
  padding: 0 1.15rem 1.15rem;
  background: color-mix(in srgb, var(--color-white) 92%, var(--color-paper));
  border-bottom: 1px solid color-mix(in srgb, var(--color-ink) 7%, transparent);
}

.nav-panel a {
  padding: 0.8rem 1rem;
  border-radius: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-panel a:hover,
.nav-panel a:focus-visible {
  background: color-mix(in srgb, var(--color-white) 55%, transparent);
  color: var(--color-ink);
}

.nav-panel[hidden] {
  display: none !important;
}

body.nav-open .nav-panel:not([hidden]) {
  display: flex !important;
}

@media (min-width: 900px) {
  .nav-panel {
    display: none !important;
  }
}

/* --- Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.75s var(--ease-out),
    transform 0.75s var(--ease-spring);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal--delay.is-visible {
  transition-delay: 0.12s;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .pillar-grid .reveal:nth-child(2),
  .pillar-grid .reveal:nth-child(3) {
    transition-delay: 0s;
  }
}

/* --- Hero (atlas / plate layout) --- */
.hero--atlas {
  isolation: isolate;
}

.hero {
  position: relative;
  padding: clamp(2.25rem, 5vw, 3.75rem) clamp(1.25rem, 4vw, 3rem) clamp(3rem, 6vw, 5rem);
  overflow: clip;
}

.hero--viewport {
  min-height: max(580px, calc(100svh - var(--header-h)));
  display: flex;
  flex-direction: column;
}

.hero--viewport .hero__grid {
  flex: 1;
  align-content: center;
}

.hero__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero__backdrop-slice {
  position: absolute;
  inset: 0;
  background: var(--color-offwhite);
  opacity: 1;
}

.hero__backdrop-grid {
  display: none;
}

.hero__backdrop-word {
  position: absolute;
  right: -2%;
  top: 8%;
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(4.5rem, 18vw, 14rem);
  line-height: 0.85;
  letter-spacing: -0.04em;
  color: var(--color-ink);
  opacity: 0.035;
  transform: rotate(-14deg);
  user-select: none;
  white-space: nowrap;
}

.hero__mesh {
  display: none;
}

.hero__axes {
  position: absolute;
  right: -6%;
  top: 50%;
  z-index: 1;
  transform: translateY(-50%);
  width: min(50vw, 580px);
  aspect-ratio: 1;
  opacity: 0.78;
  pointer-events: none;
  filter: drop-shadow(0 12px 40px rgba(25, 18, 12, 0.06));
}

@media (max-width: 959px) {
  .hero__axes {
    right: -28%;
    opacity: 0.38;
    width: 75vw;
  }
}

.hero__axes-svg {
  width: 100%;
  height: 100%;
}

.hero__glow {
  display: none;
}

.hero__frame {
  position: absolute;
  inset: clamp(0.85rem, 2.5vw, 1.75rem);
  z-index: 2;
  pointer-events: none;
}

.hero__frame-el {
  position: absolute;
  width: min(56px, 11vw);
  height: min(56px, 11vw);
  border-color: color-mix(in srgb, var(--color-tan-deep) 55%, transparent);
  border-style: solid;
  opacity: 0.65;
}

.hero__frame-el--tl {
  top: 0;
  left: 0;
  border-width: 2px 0 0 2px;
  border-radius: 2px 0 0 0;
}

.hero__frame-el--tr {
  top: 0;
  right: 0;
  border-width: 2px 2px 0 0;
  border-radius: 0 2px 0 0;
}

.hero__frame-el--bl {
  bottom: 0;
  left: 0;
  border-width: 0 0 2px 2px;
  border-radius: 0 0 0 2px;
}

.hero__frame-el--br {
  bottom: 0;
  right: 0;
  border-width: 0 2px 2px 0;
  border-radius: 0 0 2px 0;
}

.hero__rail {
  display: none;
  position: absolute;
  left: 0.35rem;
  top: 50%;
  z-index: 2;
  translate: 0 -50%;
  margin: 0;
  pointer-events: none;
}

@media (min-width: 1100px) {
  .hero__rail {
    display: block;
  }
}

.hero__rail-text {
  display: block;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-tan-deep) 85%, var(--color-ink));
  opacity: 0.55;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  white-space: nowrap;
}

.hero__grid {
  position: relative;
  z-index: 3;
  width: var(--container);
  margin: 0 auto;
  display: grid;
  gap: clamp(2.25rem, 5vw, 4rem);
  align-items: center;
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: clamp(2.5rem, 4vw, 4.5rem);
    align-items: stretch;
  }
}

.hero__copy-panel {
  position: relative;
  z-index: 0;
  padding: clamp(1.4rem, 3vw, 2.1rem) clamp(1.3rem, 3vw, 2rem) clamp(1.55rem, 3vw, 2.2rem) clamp(1.35rem, 3vw, 2rem);
  border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
  border: 1px solid color-mix(in srgb, var(--color-ink) 9%, transparent);
  border-left: 4px solid var(--color-tan-deep);
  background: color-mix(in srgb, var(--color-white) 72%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--shadow-lg), var(--shadow-inset);
  isolation: isolate;
}

/* Registration corners: subtle drafting-plate marks */
.hero__copy-panel::before {
  display: none;
}

.hero__copy-panel > * {
  position: relative;
  z-index: 1;
}

@media (max-width: 1023px) {
  .hero__copy-panel {
    border-radius: var(--radius-xl);
  }
}

@media (min-width: 1024px) {
  .hero__copy-panel {
    margin-right: 0.5rem;
  }
}

.hero__stamp {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.35rem 0.65rem;
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink);
  border: 2px double color-mix(in srgb, var(--color-tan-deep) 70%, transparent);
  border-radius: 4px;
  transform: rotate(6deg);
  background: color-mix(in srgb, var(--color-paper) 75%, transparent);
  box-shadow: 0 4px 14px var(--color-shadow);
}

.hero__eyebrow {
  margin: 0 0 0.85rem;
  padding-right: 6rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
}

.hero__eyebrow-line {
  width: 36px;
  height: 2px;
  background: var(--color-brown);
  opacity: 0.4;
  border-radius: 2px;
}

.hero__title {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  max-width: 100%;
}

.hero__title-line {
  display: block;
  font-size: clamp(1.85rem, 1.1vw + 1.55rem, 2.65rem);
  font-weight: 600;
  opacity: 0.92;
}

.hero__title-line--accent {
  font-size: clamp(2.35rem, 2vw + 1.75rem, 3.95rem);
  font-weight: 700;
  font-style: italic;
  color: var(--color-ink);
  padding-bottom: 0.02em;
  max-width: 12ch;
}

.hero__title-line--end {
  font-size: clamp(1.9rem, 1.2vw + 1.5rem, 2.85rem);
  margin-top: 0.08em;
}

.hero__subtitle {
  margin: 0 0 1.15rem;
  font-size: clamp(1.02rem, 0.42vw + 0.95rem, 1.2rem);
  font-weight: 400;
  line-height: 1.58;
  color: var(--color-ink-soft);
  max-width: 42ch;
  border-left: 3px solid color-mix(in srgb, var(--color-tan-deep) 55%, transparent);
  padding-left: 1.05rem;
}

.hero__author {
  margin: 0 0 1.35rem;
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 0.5vw + 1.02rem, 1.42rem);
  font-weight: 600;
  color: var(--color-ink);
}

.hero__degree {
  font-weight: 600;
  font-style: italic;
}

.hero__stats {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.75rem;
}

.hero__stats li {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.38rem 0.78rem 0.38rem 0.95rem;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-white) 82%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  font-size: 0.78rem;
  font-weight: 500;
  box-shadow: var(--shadow-xs), var(--shadow-inset);
  transition:
    border-color 0.22s ease,
    box-shadow 0.24s ease,
    background-color 0.22s ease,
    transform 0.22s var(--ease-spring);
}

/* Mini axis: vertical guide + tick (matches atlas / drafting theme) */
.hero__stats li::before {
  content: "";
  position: absolute;
  left: 0.48rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: calc(100% - 0.5rem);
  border-radius: 1px;
  background: color-mix(in srgb, var(--color-brown) 35%, transparent);
  opacity: 0.72;
  pointer-events: none;
}

.hero__stats li::after {
  content: "";
  position: absolute;
  left: 0.38rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0.38rem;
  height: 1px;
  border-radius: 1px;
  background: color-mix(in srgb, var(--color-tan-deep) 58%, transparent);
  opacity: 0.85;
  pointer-events: none;
}

.hero__stats li:hover {
  border-color: color-mix(in srgb, var(--color-tan-deep) 32%, var(--color-ink) 10%);
  background: color-mix(in srgb, var(--color-white) 88%, transparent);
  box-shadow: var(--shadow-sm), 0 0 0 1px color-mix(in srgb, var(--color-tan-deep) 14%, transparent);
  transform: translateY(-1px);
}

.hero__stats li .hero__stat-val,
.hero__stats li .hero__stat-lbl {
  position: relative;
  z-index: 1;
}

.hero__stat-val {
  font-weight: 700;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.hero__stat-lbl {
  color: var(--color-ink-soft);
  font-weight: 500;
  text-transform: lowercase;
}

@media (prefers-reduced-motion: reduce) {
  .hero__stats li {
    transition: none;
  }

  .hero__stats li:hover {
    transform: none;
  }
}

.section--book-details {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.book-details__grid {
  margin: 0 auto;
  padding: 0;
  width: var(--container);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem 1rem;
}

@media (min-width: 768px) {
  .book-details__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem 0.95rem;
  }
}

.book-details__card {
  margin: 0;
  padding: 1rem 1.05rem;
  background-image:
    linear-gradient(145deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0) 45%),
    linear-gradient(178deg, color-mix(in srgb, var(--color-white) 96%, transparent) 0%, color-mix(in srgb, var(--color-white) 88%, transparent) 100%);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
  transform: translate3d(var(--hover-x, 0), var(--hover-y, 0), 0);
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s var(--ease-out);
}

.book-details__card:hover {
  border-color: color-mix(in srgb, var(--color-tan-deep) 42%, transparent);
  box-shadow: var(--shadow-md);
  transform: translate3d(var(--hover-x, 0), calc(-3px + var(--hover-y, 0)), 0);
}

.book-details__card dt {
  margin: 0 0 0.35rem;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
}

.book-details__card dd {
  margin: 0;
  font-size: clamp(0.9rem, 0.14vw + 0.84rem, 0.98rem);
  color: var(--color-ink);
  line-height: 1.52;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.92rem 1.55rem;
  font-family: var(--font-sans);
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    transform 0.22s var(--ease-out),
    box-shadow 0.22s var(--ease-out),
    background 0.22s ease,
    color 0.22s ease,
    border-color 0.22s ease;
  transform: translate3d(var(--hover-x, 0), var(--hover-y, 0), 0);
}

.btn:focus-visible {
  outline: 2px solid var(--color-tan-deep);
  outline-offset: 3px;
}

.btn__ico {
  flex-shrink: 0;
  opacity: 0.9;
}

.btn--primary {
  background: var(--color-brown);
  color: var(--color-offwhite);
  box-shadow: none;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: none;
}

.btn--ghost {
  background: color-mix(in srgb, var(--color-white) 35%, transparent);
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-ink) 16%, transparent);
}

.btn--ghost:hover {
  border-color: var(--color-ink);
  background: color-mix(in srgb, var(--color-white) 72%, transparent);
}

.btn--light {
  background: var(--color-paper);
  color: var(--color-ink);
}

.btn--light:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.band--deep .btn--light {
  background: color-mix(in srgb, var(--color-paper) 96%, white);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.32), var(--shadow-inset);
  font-weight: 600;
}

.band--deep .btn--light:hover {
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.42), var(--shadow-inset);
}

.hero__visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  perspective: 1400px;
  position: relative;
}

@media (min-width: 1024px) {
  .hero__visual {
    padding: 0.5rem 0 1rem;
  }
}

.hero__visual-stack {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__coords {
  position: absolute;
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.08em;
  color: var(--color-tan-deep);
  opacity: 0.55;
  z-index: 4;
}

.hero__coords--y {
  left: 0;
  top: 42%;
}

.hero__coords--x {
  right: 2%;
  bottom: 28%;
}

@media (max-width: 639px) {
  .hero__coords {
    display: none;
  }
}

.hero__book-stage {
  position: relative;
  width: min(100%, 460px);
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.hero__book-float {
  position: relative;
  z-index: 2;
  width: 86%;
  transform-style: preserve-3d;
  animation: book-float 7.2s ease-in-out infinite;
  filter: drop-shadow(0 32px 64px rgba(25, 18, 12, 0.42)) drop-shadow(0 10px 26px rgba(25, 18, 12, 0.2));
}

.hero__book-tilt {
  transform-style: preserve-3d;
  transition: transform 0.14s ease-out;
  will-change: transform;
}

.hero__book-tilt.is-tilting {
  transition: none;
}

.hero__book-img {
  width: 100%;
  display: block;
  border-radius: 8px 14px 14px 8px;
  border: none;
  mix-blend-mode: normal;
}

.hero__orbit {
  position: absolute;
  inset: 2% 0;
  z-index: 1;
  pointer-events: none;
}

.hero__orbit-ring {
  position: absolute;
  inset: 0;
  border: 1px solid color-mix(in srgb, var(--color-tan-deep) 42%, transparent);
  border-radius: 50%;
  animation: orbit-pulse 5.8s ease-in-out infinite;
}

.hero__orbit-ring--delay {
  inset: 9%;
  animation-delay: 1.1s;
  opacity: 0.6;
}

.hero__orbit-dot {
  position: absolute;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: color-mix(in srgb, var(--color-tan-deep) 85%, var(--color-ink));
  opacity: 0.5;
}

.hero__orbit-dot--a {
  right: 6%;
  top: 44%;
}

.hero__plinth {
  width: min(72%, 280px);
  height: 14px;
  margin-top: -0.25rem;
  border-radius: 50%;
  background: var(--color-brown);
  box-shadow: none;
  transform: perspective(400px) rotateX(28deg);
  z-index: 1;
  opacity: 0.92;
}

.hero__book-tag {
  margin: 0.85rem 0 0;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
  opacity: 0.85;
}

.hero__book-tag span {
  color: var(--color-ink);
  opacity: 0.75;
}

.hero__caption {
  margin: 0.65rem 0 0;
  max-width: 34ch;
  text-align: center;
  font-size: 0.86rem;
  color: var(--color-ink-soft);
  line-height: 1.55;
}

/* Trust strip: continuous horizontal motion (left → right across the viewport) */
.hero__trust {
  position: relative;
  z-index: 2;
  flex-shrink: 0;
  margin: clamp(1.25rem, 3vw, 2rem) calc(-1 * clamp(1.25rem, 4vw, 3rem)) 0;
  padding: 0.65rem 0 0;
  border-top: 1px solid color-mix(in srgb, var(--color-ink) 7%, transparent);
}

.hero__trust-mask {
  overflow: hidden;
  mask-image: none;
}

.hero__trust-track {
  display: flex;
  flex-direction: row;
  width: max-content;
  animation: hero-trust-marquee 38s linear infinite;
  will-change: transform;
}

.hero__trust-list {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  margin: 0;
  padding: 0.35rem clamp(1.5rem, 3vw, 2.5rem);
  list-style: none;
  flex-shrink: 0;
}

.hero__trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
  opacity: 0.88;
}

.hero__trust-ico {
  display: flex;
  color: color-mix(in srgb, var(--color-tan-deep) 82%, var(--color-ink));
  opacity: 0.92;
}

.hero__trust-txt {
  color: var(--color-ink-soft);
  font-weight: 600;
}

@keyframes hero-trust-marquee {
  from {
    transform: translateX(-50%);
  }

  to {
    transform: translateX(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero__trust-track {
    animation: none;
    transform: none;
    justify-content: center;
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
  }

  .hero__trust-list--clone {
    display: none;
  }

  .hero__trust-list {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0.35rem 0.5rem;
  }
}

@keyframes book-float {
  0%,
  100% {
    transform: translateY(0) rotateY(-7deg) rotateX(4deg);
  }
  50% {
    transform: translateY(-16px) rotateY(5deg) rotateX(2deg);
  }
}

@keyframes orbit-pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.035);
    opacity: 0.82;
  }
}

/* --- Quote --- */
.quote {
  padding: clamp(2.75rem, 6.5vw, 4.75rem) clamp(1.25rem, 4vw, 3rem);
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
  border-bottom: 1px solid var(--color-navy-border);
}

.quote__inner {
  position: relative;
  width: var(--container);
  margin: 0 auto;
  text-align: center;
  padding: clamp(1.5rem, 3.5vw, 2.35rem) clamp(1rem, 3vw, 2rem);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--color-white) 55%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-ink) 7%, transparent);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
}

.quote__inner::before {
  content: "“";
  display: block;
  font-family: var(--font-serif);
  font-size: clamp(3.5rem, 8vw, 5rem);
  line-height: 0.85;
  color: color-mix(in srgb, var(--color-tan-deep) 35%, transparent);
  margin-bottom: 0.15rem;
  user-select: none;
  pointer-events: none;
}

.quote__body {
  margin: 0;
}

.quote__body p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.45rem, 1.2vw + 1.2rem, 2.05rem);
  font-style: italic;
  font-weight: 500;
  line-height: 1.38;
  color: var(--color-ink);
}

.quote__body p::after {
  content: "”";
}

.quote__meta {
  margin: 1.35rem 0 0;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
}

/* --- Section transitions (unique joins between blocks) --- */
.section-join {
  position: relative;
  width: 100%;
  pointer-events: none;
}

.section-join--axis {
  padding: clamp(1.5rem, 4vw, 2.25rem) 1rem;
  background: var(--color-navy);
}

.section-join__wrap {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: clamp(1.75rem, 8vw, 3.5rem);
  max-width: min(520px, 92vw);
  height: 18px;
  margin: 0 auto;
}

.section-join__axis-line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--color-on-navy);
  opacity: 0.22;
}

.section-join__axis-tick {
  position: relative;
  z-index: 1;
  width: 1px;
  height: 9px;
  background: var(--color-on-navy);
  opacity: 0.38;
  border-radius: 1px;
}

.section-join__axis-tick--mid {
  height: 16px;
  opacity: 0.72;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-tan) 18%, transparent);
}

.section-join--spiral {
  padding: clamp(1rem, 3vw, 1.5rem) clamp(1rem, 4vw, 2rem);
  background: var(--color-navy);
  color: var(--color-on-navy-muted);
}

.section-join__svg {
  display: block;
  width: min(880px, 100%);
  height: auto;
  max-height: 52px;
  margin: 0 auto;
  opacity: 0.82;
}

.section-join__spiral-path {
  stroke-dasharray: 6 14;
  animation: join-spiral-drift 22s linear infinite;
}

@keyframes join-spiral-drift {
  to {
    stroke-dashoffset: -400;
  }
}

@media (prefers-reduced-motion: reduce) {
  .section-join__spiral-path {
    animation: none;
    stroke-dasharray: none;
  }
}

.section-join--rings {
  padding: clamp(1.75rem, 4vw, 2.5rem) 1rem;
  background: var(--color-navy);
}

.section-join__rings {
  position: relative;
  width: min(200px, 50vw);
  height: 56px;
  margin: 0 auto;
}

.section-join__ring {
  position: absolute;
  left: 50%;
  translate: -50% 0;
  border: 1px solid rgba(62, 43, 30, 0.16);
  border-radius: 50%;
  animation: join-ring-breathe 6s ease-in-out infinite;
}

.section-join__ring:nth-child(1) {
  bottom: 4px;
  width: 100%;
  height: 38px;
  opacity: 0.45;
  animation-delay: 0s;
}

.section-join__ring:nth-child(2) {
  bottom: 10px;
  width: 72%;
  height: 30px;
  opacity: 0.58;
  animation-delay: 0.35s;
}

.section-join__ring:nth-child(3) {
  bottom: 16px;
  width: 46%;
  height: 22px;
  opacity: 0.72;
  animation-delay: 0.7s;
}

@keyframes join-ring-breathe {
  0%,
  100% {
    opacity: 0.4;
    filter: saturate(1);
  }
  50% {
    opacity: 0.85;
    filter: saturate(1.15);
  }
}

@media (prefers-reduced-motion: reduce) {
  .section-join__ring {
    animation: none;
  }
}

.section-join--grid {
  padding: clamp(1.35rem, 3vw, 2rem) 1rem;
  background: var(--color-navy);
  display: flex;
  justify-content: center;
  align-items: center;
  color: rgba(62, 43, 30, 0.38);
}

.section-join__svg--grid {
  width: min(120px, 28vw);
  height: auto;
  opacity: 0.88;
  filter: drop-shadow(0 8px 20px rgba(25, 18, 12, 0.08));
}

.section-join--nodes {
  padding: clamp(1.5rem, 4vw, 2.25rem) 1rem;
  background: var(--color-navy);
}

.section-join__nodes {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 420px;
  margin: 0 auto;
  gap: 0;
}

.section-join__node {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-on-navy);
  opacity: 0.35;
}

.section-join__node--accent {
  width: 11px;
  height: 11px;
  opacity: 0.95;
  background: var(--color-on-navy);
  box-shadow: 0 0 0 4px rgba(62, 43, 30, 0.1);
}

.section-join__node-line {
  flex: 1;
  height: 1px;
  min-width: 28px;
  max-width: 80px;
  margin: 0 2px;
  background: var(--color-on-navy);
  opacity: 0.2;
}

.section-join--ribbon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: clamp(1.25rem, 3vw, 1.75rem) 1rem;
  background: var(--color-navy);
}

.section-join__ribbon-line {
  flex: 1;
  height: 2px;
  max-width: min(160px, 22vw);
  background: var(--color-on-navy);
  border-radius: 2px;
  opacity: 0.25;
}

.section-join__ribbon-line--flip {
  background: var(--color-on-navy);
  opacity: 0.25;
}

.section-join__ribbon-gem {
  width: 7px;
  height: 7px;
  margin: 0 12px;
  background: var(--color-navy);
  border: 1px solid rgba(62, 43, 30, 0.18);
  transform: rotate(45deg);
  box-shadow: none;
  flex-shrink: 0;
}

.section-join--fade {
  padding: clamp(2rem, 5vw, 3rem) 1rem clamp(2.25rem, 6vw, 3.5rem);
  background: var(--color-navy);
}

.section-join__fade-bar {
  height: 2px;
  max-width: min(240px, 55vw);
  margin: 0 auto 1.1rem;
  background: var(--color-offwhite);
  opacity: 0.35;
  border-radius: 2px;
}

.section-join__fade-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.section-join__fade-dots span {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-paper);
  opacity: 0.25;
}

.section-join__fade-dots span:nth-child(3) {
  width: 6px;
  height: 6px;
  opacity: 0.55;
  background: var(--color-tan);
}

/* --- Highlights strip --- */
.highlights {
  padding: clamp(1.35rem, 3.5vw, 2rem) clamp(1.25rem, 4vw, 3rem) clamp(2.5rem, 6vw, 3.85rem);
  background: var(--color-navy) !important;
  border-top: 1px solid var(--color-navy-border);
  border-bottom: 1px solid var(--color-navy-border);
  position: relative;
  isolation: isolate;
}

.highlights::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: none;
  opacity: 0;
  pointer-events: none;
}

.highlights__inner {
  position: relative;
  z-index: 1;
  width: var(--container);
  margin: 0 auto;
}

.highlights__head {
  text-align: center;
  width: 100%;
  max-width: none;
  margin: 0 auto 1.85rem;
}

.highlights__kicker {
  margin: 0 0 0.55rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-on-navy-muted);
}

.highlights__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 1.15vw + 1.25rem, 2.05rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-on-navy);
}

.highlights__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .highlights__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
}

.highlights__item {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius-lg);
  background-image:
    linear-gradient(145deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0) 42%),
    linear-gradient(178deg, color-mix(in srgb, var(--color-white) 95%, transparent) 0%, color-mix(in srgb, var(--color-white) 88%, transparent) 100%);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s var(--ease-out), border-color 0.28s ease;
  transform: translate3d(var(--hover-x, 0), var(--hover-y, 0), 0);
}

.highlights__item:hover {
  transform: translate3d(var(--hover-x, 0), calc(-4px + var(--hover-y, 0)), 0);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-tan-deep) 28%, transparent);
}

.highlights__value {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-ink);
  margin-bottom: 0.35rem;
  letter-spacing: 0.01em;
}

.highlights__label {
  display: block;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--color-ink);
}

.section--book-showcase {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
  border-bottom: 1px solid var(--color-navy-border);
}

.book-showcase {
  width: var(--container);
  margin: 0 auto;
  display: grid;
  gap: 1.25rem;
  background: linear-gradient(178deg, #fffefb 0%, #f5f2eb 100%);
  border: 1px solid rgba(62, 43, 30, 0.12);
  border-radius: 22px;
  padding: clamp(1rem, 2.5vw, 1.5rem);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.92) inset,
    0 2px 10px rgba(45, 33, 24, 0.06),
    0 32px 64px -40px rgba(45, 33, 24, 0.2);
}

@media (min-width: 900px) {
  .book-showcase {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: stretch;
  }
}

.book-showcase__media,
.book-showcase__content {
  background: transparent;
  border: none;
  border-radius: var(--radius-lg);
  padding: 1.1rem;
}

.book-showcase__media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.book-showcase__img {
  width: min(100%, 240px);
  border-radius: 12px;
  border: none;
  box-shadow: 0 12px 36px -16px rgba(45, 33, 24, 0.22);
}

.book-showcase__lede {
  margin: 0 0 0.9rem;
  color: var(--color-ink);
  font-size: 0.98rem;
  line-height: 1.58;
}

.book-showcase__list {
  margin: 0;
  padding-left: 1.05rem;
  color: var(--color-ink);
  line-height: 1.6;
  font-size: 0.95rem;
}

.book-showcase__list li {
  margin-bottom: 0.45rem;
}

.book-showcase__buy-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.book-showcase__buy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.25rem;
  min-height: 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  color: #ece6d9;
  background: #423024;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    background 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease,
    transform 0.15s ease;
}

.book-showcase__buy-btn:hover {
  background: #524030;
  color: #faf6ef;
}

.book-showcase__buy-btn:focus-visible {
  outline: 2px solid #423024;
  outline-offset: 2px;
}

.book-showcase__buy-btn--ghost {
  color: var(--color-ink);
  background: color-mix(in srgb, var(--color-white) 88%, var(--color-parchment-soft));
  border: 1px solid color-mix(in srgb, var(--color-ink) 16%, transparent);
}

.book-showcase__buy-btn--ghost:hover {
  background: var(--color-white);
  color: var(--color-ink);
  border-color: color-mix(in srgb, var(--color-ink) 24%, transparent);
}

.book-showcase__buy-btn--ghost:focus-visible {
  outline-color: var(--color-ink);
}

/* --- Sections --- */
.section {
  padding: clamp(3.5rem, 8vw, 6.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section--thesis {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.section__head {
  width: var(--container);
  margin: 0 auto 3rem;
  text-align: center;
}

.section__head .section__label {
  display: inline-block;
}

.section__head .section__label::after {
  content: "";
  display: block;
  width: min(6.5rem, 28vw);
  height: 2px;
  margin: 0.7rem auto 0;
  border-radius: 2px;
  background: var(--color-brown);
  opacity: 0.35;
}

.author-block .section__label {
  display: inline-block;
}

.author-block .section__label::after {
  content: "";
  display: block;
  width: min(6rem, 30vw);
  height: 2px;
  margin: 0.7rem auto 0;
  border-radius: 2px;
  background: var(--color-brown);
  opacity: 0.35;
}

.section__label {
  margin: 0 0 0.65rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
}

.section__title {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 1.4vw + 1.5rem, 2.65rem);
  font-weight: 700;
  line-height: 1.12;
  color: var(--color-ink);
}

.section__title--center {
  text-align: center;
}

.section__lede {
  margin: 0;
  font-size: 1.12rem;
  color: var(--color-ink);
  line-height: 1.65;
}

.section__lede--left {
  text-align: left;
}

.pillar-grid {
  width: var(--container);
  margin: 0 auto;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .pillar-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.pillar {
  padding: 1.75rem 1.6rem;
  border-radius: var(--radius-lg);
  background-image:
    linear-gradient(145deg, rgba(255, 255, 255, 0.48) 0%, rgba(255, 255, 255, 0) 40%),
    linear-gradient(178deg, color-mix(in srgb, var(--color-white) 94%, transparent) 0%, color-mix(in srgb, var(--color-white) 86%, transparent) 100%);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-md), var(--shadow-inset);
  transform: translate3d(var(--hover-x, 0), var(--hover-y, 0), 0);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.3s ease;
}

.pillar-grid .reveal:nth-child(1) {
  transition-delay: 0s;
}

.pillar-grid .reveal:nth-child(2) {
  transition-delay: 0.1s;
}

.pillar-grid .reveal:nth-child(3) {
  transition-delay: 0.2s;
}

.pillar:focus-within {
  outline: 2px solid var(--color-tan-deep);
  outline-offset: 3px;
}

.pillar:hover {
  transform: translate3d(var(--hover-x, 0), calc(-5px + var(--hover-y, 0)), 0);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--color-tan-deep) 32%, transparent);
}

.pillar__icon {
  color: var(--color-tan-deep);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 14px;
  background: color-mix(in srgb, var(--color-tan-deep) 9%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-tan-deep) 18%, transparent);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s ease, border-color 0.3s ease;
}

.pillar:hover .pillar__icon {
  transform: scale(1.06);
  border-color: color-mix(in srgb, var(--color-tan-deep) 28%, transparent);
  box-shadow: 0 8px 22px -10px color-mix(in srgb, var(--color-tan-deep) 25%, transparent);
}

.pillar__icon svg {
  width: 28px;
  height: 28px;
  display: block;
}

.pillar__title {
  margin: 0 0 0.65rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
}

.pillar__text {
  margin: 0;
  font-size: 0.98rem;
  color: var(--color-ink);
  line-height: 1.6;
}

.section--inside {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.inside-section {
  width: var(--container);
  margin: 0 auto;
}

.inside-section__head {
  width: 100%;
  max-width: none;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2.5rem;
}

.inside-section__head .section__lede {
  max-width: 42ch;
  margin-left: auto;
  margin-right: auto;
}

.inside-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  background: transparent;
  border: none;
  box-shadow: none;
  overflow: visible;
}

@media (min-width: 768px) {
  .inside-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem 1.05rem;
  }
}

.inside-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem 0.95rem;
  align-items: start;
  padding: 1.15rem 1.1rem 1.25rem 1.05rem;
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
  background-image:
    linear-gradient(135deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0) 38%),
    linear-gradient(178deg, color-mix(in srgb, var(--color-white) 96%, transparent) 0%, color-mix(in srgb, var(--color-white) 90%, transparent) 100%);
  transform: translate3d(var(--hover-x, 0), var(--hover-y, 0), 0);
  transition:
    background 0.22s ease,
    border-color 0.22s ease,
    box-shadow 0.22s ease,
    transform 0.22s var(--ease-out);
}

.inside-list__item:hover {
  background-image:
    linear-gradient(135deg, rgba(255, 255, 255, 0.52) 0%, rgba(255, 255, 255, 0) 40%),
    linear-gradient(
      178deg,
      color-mix(in srgb, var(--color-paper) 48%, var(--color-white)) 0%,
      color-mix(in srgb, var(--color-white) 94%, transparent) 100%
    );
  border-color: color-mix(in srgb, var(--color-tan-deep) 30%, transparent);
  box-shadow: var(--shadow-md);
  transform: translate3d(var(--hover-x, 0), calc(-3px + var(--hover-y, 0)), 0);
}

.inside-list__n {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-tan-deep);
  line-height: 1.2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.65rem;
  padding: 0.4rem 0.35rem;
  border-radius: 12px;
  background: color-mix(in srgb, var(--color-tan-deep) 11%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-tan-deep) 22%, transparent);
}

.inside-list__h {
  display: block;
  font-size: clamp(0.98rem, 0.2vw + 0.92rem, 1.05rem);
  font-weight: 700;
  margin-bottom: 0.3rem;
  line-height: 1.25;
}

.inside-list__p {
  margin: 0;
  font-size: clamp(0.92rem, 0.16vw + 0.86rem, 0.98rem);
  color: var(--color-ink);
  line-height: 1.52;
}

/* --- Band --- */
.band {
  padding: clamp(3.5rem, 8vw, 6rem) clamp(1.25rem, 4vw, 3rem);
}

.band--paper {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.band__wide {
  width: var(--container);
  margin: 0 auto;
}

.author-block {
  text-align: center;
}

.author-aside {
  margin: 2rem auto 0;
  max-width: 52ch;
  padding: 1.25rem 1.4rem;
  text-align: left;
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-tan-deep);
  background: color-mix(in srgb, var(--color-white) 88%, transparent);
  border-top: 1px solid color-mix(in srgb, var(--color-ink) 6%, transparent);
  border-right: 1px solid color-mix(in srgb, var(--color-ink) 6%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--color-ink) 6%, transparent);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
}

.author-aside__text {
  margin: 0;
  font-size: 0.98rem;
  font-style: italic;
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.band__text {
  margin: 0;
  color: var(--color-ink);
  font-size: 1.12rem;
  line-height: 1.75;
}

.band__text--narrow {
  max-width: 58ch;
  margin-left: auto;
  margin-right: auto;
}

.author-block .band__text {
  margin-bottom: 1.5rem;
}

.band--deep {
  position: relative;
  background: var(--color-navy-deep);
  color: var(--color-paper);
  overflow: hidden;
}

.band--deep::before {
  display: none;
}

.band--contact {
  padding: clamp(3.5rem, 8vw, 6rem) clamp(1.25rem, 4vw, 3rem);
}

.band__fine {
  position: relative;
  margin: 0;
  font-size: 0.82rem;
  color: color-mix(in srgb, var(--color-paper) 52%, transparent);
  font-style: italic;
}

/* --- FAQ --- */
.faq {
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.25rem, 4vw, 3rem);
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.faq__inner {
  width: var(--container);
  margin: 0 auto;
}

.faq__head {
  text-align: center;
  margin-bottom: 2rem;
}

.faq__head .section__label {
  display: inline-block;
}

.faq__head .section__label::after {
  content: "";
  display: block;
  width: min(6.5rem, 28vw);
  height: 2px;
  margin: 0.7rem auto 0;
  border-radius: 2px;
  background: var(--color-brown);
  opacity: 0.35;
}

.faq__lede {
  margin: 0.75rem 0 0;
  font-size: 1.05rem;
  color: var(--color-ink);
  line-height: 1.6;
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.faq__item {
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  background: color-mix(in srgb, var(--color-white) 92%, var(--color-paper));
  box-shadow: var(--shadow-xs), var(--shadow-inset);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq__item[open] {
  border-color: color-mix(in srgb, var(--color-tan-deep) 35%, transparent);
  box-shadow: var(--shadow-sm);
}

.faq__q {
  list-style: none;
  padding: 1.1rem 1.25rem;
  padding-right: 2.75rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-ink);
  cursor: pointer;
  position: relative;
  transition: background 0.2s ease;
}

.faq__q:hover {
  background: color-mix(in srgb, var(--color-white) 70%, transparent);
}

.faq__q::marker,
.faq__q::-webkit-details-marker {
  display: none;
}

.faq__q::after {
  content: "";
  position: absolute;
  right: 1.2rem;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -6px;
  border-right: 2px solid var(--color-tan-deep);
  border-bottom: 2px solid var(--color-tan-deep);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease-out);
}

.faq__item[open] .faq__q::after {
  transform: rotate(225deg);
  margin-top: -2px;
}

.faq__q:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--color-tan-deep);
}

.faq__a {
  margin: 0;
  padding: 0 1.25rem 1.15rem;
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--color-ink);
  border-top: 1px solid color-mix(in srgb, var(--color-tan) 22%, transparent);
  padding-top: 0.85rem;
}

.band__inner {
  position: relative;
  width: var(--container);
  margin: 0 auto;
  text-align: center;
}

.band__kicker {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-sand) 90%, white);
}

.band__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 1.2vw + 1.5rem, 2.5rem);
  font-weight: 700;
  color: var(--color-ink);
}

.band__title--on-dark {
  color: var(--color-paper);
}

.band__text--on-dark {
  color: color-mix(in srgb, var(--color-paper) 84%, transparent);
  max-width: 48ch;
}

.link-ghost {
  font-weight: 600;
  color: color-mix(in srgb, var(--color-paper) 88%, transparent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-paper) 35%, transparent);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.link-ghost:hover {
  color: var(--color-paper);
  border-bottom-color: var(--color-paper);
}

.link-ghost:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --- Contact (modern split + card) --- */
.contact-shell {
  width: min(1100px, 100%);
  margin: 0 auto;
  position: relative;
}

.contact-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  align-items: start;
}

@media (min-width: 900px) {
  .contact-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 26rem);
    gap: clamp(2rem, 5vw, 3.5rem);
    align-items: stretch;
  }
}

.contact-intro {
  text-align: left;
}

@media (min-width: 900px) {
  .contact-intro {
    padding-top: 0.35rem;
  }
}

.contact-eyebrow {
  margin: 0 0 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-paper) 58%, transparent);
}

.contact-heading {
  margin: 0 0 0.85rem;
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 1.1vw + 1.45rem, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-paper);
}

.contact-lede {
  margin: 0;
  font-size: clamp(0.98rem, 0.35vw + 0.9rem, 1.06rem);
  line-height: 1.65;
  color: color-mix(in srgb, var(--color-paper) 78%, transparent);
  max-width: 42ch;
}

.contact-card {
  border-radius: 20px;
  border: 1px solid color-mix(in srgb, var(--color-paper) 14%, transparent);
  background: color-mix(in srgb, var(--color-paper) 7%, transparent);
  box-shadow:
    0 1px 0 color-mix(in srgb, var(--color-paper) 12%, transparent) inset,
    0 24px 48px -28px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.contact-card__main {
  padding: clamp(1.35rem, 3vw, 1.75rem) clamp(1.25rem, 3vw, 1.65rem);
}

.contact-card__label {
  display: block;
  margin-bottom: 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-paper) 52%, transparent);
}

.contact-card__mail {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.88rem 1.25rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.94rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--color-navy-deep);
  background: linear-gradient(180deg, #fffef9 0%, #f2ebe0 100%);
  border: 1px solid color-mix(in srgb, var(--color-paper) 45%, transparent);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.75) inset,
    0 10px 28px -8px rgba(0, 0, 0, 0.35);
  transition:
    transform 0.2s var(--ease-out),
    box-shadow 0.2s var(--ease-out),
    color 0.2s ease;
}

.contact-card__mail:hover {
  transform: translateY(-2px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.85) inset,
    0 14px 36px -10px rgba(0, 0, 0, 0.42);
}

.contact-card__mail:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 3px;
}

.contact-card__icon {
  flex-shrink: 0;
  opacity: 0.88;
}

.contact-card__address {
  word-break: break-all;
}

@media (min-width: 420px) {
  .contact-card__address {
    word-break: normal;
  }
}

.contact-card__hint {
  margin: 1rem 0 0;
  font-size: 0.84rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--color-paper) 58%, transparent);
}

.contact-card__footer {
  padding: 1rem clamp(1.25rem, 3vw, 1.65rem) clamp(1.15rem, 3vw, 1.45rem);
  border-top: 1px solid color-mix(in srgb, var(--color-paper) 10%, transparent);
  background: rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.contact-card__secondary {
  align-self: flex-start;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  color: color-mix(in srgb, var(--color-paper) 88%, transparent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-paper) 32%, transparent);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.contact-card__secondary:hover {
  color: var(--color-paper);
  border-bottom-color: color-mix(in srgb, var(--color-paper) 55%, transparent);
}

.contact-card__secondary:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 3px;
  border-radius: 4px;
}

.contact-card__secondary-arrow {
  margin-right: 0.15em;
  opacity: 0.75;
}

.contact-card__fine {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.5;
  font-style: italic;
  color: color-mix(in srgb, var(--color-paper) 48%, transparent);
}

@media (max-width: 599px) {
  .contact-layout {
    gap: 1.35rem;
  }

  .contact-card__mail {
    width: 100%;
    max-width: 100%;
    justify-content: center;
    box-sizing: border-box;
  }
}

@media (max-width: 540px) {
  .inside-list__item {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  .inside-list__n {
    justify-self: start;
  }
}

@media (max-width: 899px) {
  .contact-shell {
    width: 100%;
    padding-left: max(0px, env(safe-area-inset-left, 0px));
    padding-right: max(0px, env(safe-area-inset-right, 0px));
    box-sizing: border-box;
  }

  .contact-intro {
    max-width: 100%;
  }

  .contact-lede {
    max-width: none;
  }

  .contact-heading {
    overflow-wrap: break-word;
    text-wrap: balance;
  }

  .book-details__card dd,
  .facts-card__value {
    overflow-wrap: break-word;
  }

  .page-section,
  .band,
  .section,
  .faq,
  .highlights,
  .quote {
    padding-left: max(1rem, env(safe-area-inset-left, 0px));
    padding-right: max(1rem, env(safe-area-inset-right, 0px));
  }

  .band--contact {
    padding-left: max(1rem, env(safe-area-inset-left, 0px));
    padding-right: max(1rem, env(safe-area-inset-right, 0px));
  }

  .site-footer__main,
  .site-footer__bar {
    padding-left: max(1.25rem, env(safe-area-inset-left, 0px));
    padding-right: max(1.25rem, env(safe-area-inset-right, 0px));
  }
}

/* --- Extended page sections (facts, scope, contents, depth) --- */
.page-section {
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.25rem, 4vw, 3rem);
}

.page-section--facts {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.page-section--scope {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.page-section--toc {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.page-section--depth {
  background: var(--color-navy);
  border-top: 1px solid var(--color-navy-border);
}

.page-section__inner {
  width: var(--container);
  margin: 0 auto;
}

.page-section__inner--wide {
  width: var(--container);
}

.page-section__head {
  text-align: center;
  margin-bottom: 2.25rem;
}

.page-section__head .section__label {
  display: inline-block;
}

.page-section__head .section__label::after {
  content: "";
  display: block;
  width: min(6.5rem, 28vw);
  height: 2px;
  margin: 0.7rem auto 0;
  border-radius: 2px;
  background: var(--color-brown);
  opacity: 0.35;
}

.page-section__intro {
  margin: 0.75rem auto 0;
  max-width: 56ch;
  font-size: 1.05rem;
  line-height: 1.68;
  color: var(--color-ink);
}

.page-section__intro--narrow {
  max-width: 48ch;
}

.facts-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 600px) {
  .facts-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .facts-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.facts-card {
  padding: 1.15rem 1.2rem;
  border-radius: var(--radius-lg);
  background-image:
    linear-gradient(145deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0) 44%),
    linear-gradient(178deg, color-mix(in srgb, var(--color-white) 95%, transparent) 0%, color-mix(in srgb, var(--color-white) 88%, transparent) 100%);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-sm), var(--shadow-inset);
  transform: translate3d(var(--hover-x, 0), var(--hover-y, 0), 0);
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s var(--ease-out);
}

.facts-card:hover {
  border-color: color-mix(in srgb, var(--color-tan-deep) 32%, transparent);
  box-shadow: var(--shadow-md);
  transform: translate3d(var(--hover-x, 0), calc(-3px + var(--hover-y, 0)), 0);
}

.facts-card__label {
  display: block;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.facts-card__value {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-ink);
}

.facts-card__meta {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: color-mix(in srgb, var(--color-ink) 82%, transparent);
}

.scope-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 900px) {
  .scope-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
    align-items: stretch;
  }
}

.scope-copy,
.scope-aside {
  height: 100%;
}

.scope-copy .section__label {
  text-align: left;
  display: inline-block;
}

.scope-copy .section__label::after {
  content: "";
  display: block;
  width: min(5rem, 42vw);
  height: 2px;
  margin: 0.65rem 0 0;
  border-radius: 2px;
  background: var(--color-brown);
  opacity: 0.35;
}

.scope-copy .section__title {
  text-align: left;
}

.scope-lede {
  margin: 0 0 1.25rem;
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--color-ink);
  max-width: 52ch;
}

.scope-list {
  margin: 0;
  padding-left: 0;
  list-style: none;
  color: var(--color-ink);
  line-height: 1.65;
  font-size: 0.98rem;
}

.scope-list li {
  position: relative;
  margin-bottom: 0.75rem;
  padding-left: 1.35rem;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-tan-deep);
  opacity: 0.55;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-tan-deep) 15%, transparent);
}

.scope-list li strong {
  color: var(--color-ink);
}

.scope-aside {
  padding: 1.35rem 1.4rem;
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--color-white) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-md), var(--shadow-inset);
}

.scope-aside__h {
  margin: 0 0 0.85rem;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-ink);
}

.scope-aside__list {
  margin: 0 0 1rem;
  padding-left: 1.15rem;
  color: var(--color-ink);
  font-size: 0.94rem;
  line-height: 1.55;
}

.scope-aside__list li {
  margin-bottom: 0.45rem;
}

.scope-aside__note {
  margin: 0;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--color-ink);
  line-height: 1.5;
}

.toc-panel {
  width: 100%;
  max-width: none;
  margin: 0 auto;
  padding: clamp(1.25rem, 3vw, 1.85rem) clamp(1.1rem, 2.8vw, 1.65rem);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--color-white) 92%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  box-shadow: var(--shadow-md), var(--shadow-inset);
}

.toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc-part {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
}

.toc-part:first-child {
  padding-top: 0;
}

.toc-part:last-child {
  border-bottom: none;
}

.toc-part__n {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-tan-deep);
  white-space: nowrap;
  padding-top: 0.2rem;
  opacity: 0.95;
}

.toc-part__h {
  margin: 0 0 0.4rem;
  font-family: var(--font-serif);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1.25;
}

.toc-part__p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--color-ink);
}

@media (max-width: 520px) {
  .toc-part {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

.depth-split {
  display: grid;
  gap: 2rem;
}

@media (min-width: 900px) {
  .depth-split {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: stretch;
  }
}

.depth-block {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-ink) 8%, transparent);
  background: color-mix(in srgb, var(--color-paper) 28%, var(--color-white));
  box-shadow: var(--shadow-sm), var(--shadow-inset);
  height: 100%;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.3s ease;
}

.depth-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1rem;
  right: 1rem;
  height: 3px;
  border-radius: 0 0 8px 8px;
  background: linear-gradient(90deg, var(--color-ink-cover), color-mix(in srgb, var(--color-ink-cover) 45%, #7a5a42));
  opacity: 1;
}

.depth-block::after {
  display: none;
}

.depth-block:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--color-brown) 28%, transparent);
  box-shadow: var(--shadow-md), var(--shadow-inset);
}

.depth-block--guide {
  background: var(--color-offwhite);
  border-color: color-mix(in srgb, var(--color-brown) 15%, transparent);
}

.depth-block .section__title {
  margin: 0 0 0.65rem;
  font-size: clamp(1.45rem, 1.1vw + 1.15rem, 1.85rem);
  text-align: left;
}

.depth-lede {
  margin: 0 0 1.1rem;
  font-size: 0.98rem;
  color: var(--color-ink);
  line-height: 1.58;
}

.theme-chips {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.theme-chips li {
  padding: 0.38rem 0.8rem;
  font-size: 0.84rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-offwhite) 92%, white);
  border: 1px solid color-mix(in srgb, var(--color-brown) 16%, transparent);
  color: var(--color-ink);
  box-shadow: var(--shadow-xs);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s var(--ease-out);
}

.theme-chips li:hover {
  border-color: color-mix(in srgb, var(--color-tan-deep) 35%, transparent);
  background: color-mix(in srgb, var(--color-white) 96%, transparent);
  transform: translateY(-1px);
}

.depth-notes__title {
  margin: 1.1rem 0 0.55rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-ink);
}

.depth-notes {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-ink);
  font-size: 0.92rem;
  line-height: 1.58;
}

.depth-notes li {
  margin-bottom: 0.4rem;
}

.depth-guide__h {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-ink);
}

.depth-guide__steps {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.depth-guide__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem 0.85rem;
  margin-bottom: 0.75rem;
  font-size: 0.94rem;
  line-height: 1.5;
  color: var(--color-ink);
}

.depth-guide__steps span:first-child {
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-paper);
  background: var(--color-ink);
  border-radius: 50%;
  flex-shrink: 0;
}

.depth-guide__steps a {
  color: var(--color-tan-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-tan-deep) 45%, transparent);
}

.depth-guide__steps a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-ink);
}

.depth-guide__steps a:focus-visible {
  outline: 2px solid var(--color-tan-deep);
  outline-offset: 3px;
  border-radius: 4px;
}

.depth-guide__note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--color-ink);
  font-style: italic;
}

/* --- Footer (compact, flat) --- */
.site-footer {
  position: relative;
  margin-top: 0;
  background: var(--color-navy-deep);
  color: color-mix(in srgb, var(--color-paper) 74%, transparent);
  border-top: 1px solid var(--color-navy-border);
}

.site-footer::before {
  display: none;
}

.site-footer__main,
.site-footer__bar {
  position: relative;
  z-index: 1;
}

.site-footer__main {
  padding: clamp(1.15rem, 3vw, 1.65rem) clamp(1.25rem, 4vw, 3rem);
}

.site-footer__inner {
  width: var(--container);
  margin: 0 auto;
}

.site-footer__grid {
  display: grid;
  gap: 1.25rem 1.75rem;
}

@media (min-width: 640px) and (max-width: 899px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid color-mix(in srgb, var(--color-paper) 8%, transparent);
  }

  .site-footer__col--legal {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .site-footer__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr) minmax(0, 0.92fr) minmax(0, 0.72fr);
    gap: 1rem 1.5rem;
    align-items: start;
  }
}

.site-footer__brand {
  min-width: 0;
}

.site-footer__brand-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.55rem;
}

.site-footer__monogram {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  font-family: var(--font-serif);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-paper);
  border: 1px solid color-mix(in srgb, var(--color-tan) 42%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--color-brown) 92%, transparent);
}

.site-footer__brand-copy {
  min-width: 0;
}

.site-footer__wordmark {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.08rem;
  margin-bottom: 0.4rem;
  text-decoration: none;
  color: inherit;
  transition: opacity 0.2s ease;
}

.site-footer__wordmark:hover {
  opacity: 0.92;
}

.site-footer__wordmark:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 4px;
  border-radius: 8px;
}

.site-footer__wordmark-kicker {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-tan);
}

.site-footer__wordmark-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.05rem, 0.35vw + 0.95rem, 1.28rem);
  color: var(--color-paper);
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.site-footer__wordmark-suffix {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 600;
  font-size: 0.92rem;
  color: color-mix(in srgb, var(--color-paper) 70%, transparent);
}

.site-footer__book-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.35;
  color: color-mix(in srgb, var(--color-paper) 82%, transparent);
  max-width: 36ch;
}

.site-footer__strap {
  margin: 0 0 0.45rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-tan) 88%, transparent);
}

.site-footer__lede {
  margin: 0 0 0.55rem;
  font-size: 0.81rem;
  line-height: 1.55;
  color: color-mix(in srgb, var(--color-paper) 50%, transparent);
  max-width: 42ch;
}

.site-footer__cta-line {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-paper) 52%, transparent);
}

.site-footer__cta-mail {
  font-weight: 600;
  color: color-mix(in srgb, var(--color-paper) 92%, transparent);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-tan) 45%, transparent);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-footer__cta-mail:hover {
  color: var(--color-paper);
  border-bottom-color: var(--color-tan);
}

.site-footer__cta-mail:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-footer__cta-sep {
  margin: 0 0.35rem;
  opacity: 0.35;
}

.site-footer__cta-hint {
  font-size: 0.76rem;
  color: color-mix(in srgb, var(--color-paper) 42%, transparent);
}

.site-footer__social {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.site-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  color: color-mix(in srgb, var(--color-paper) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-paper) 20%, transparent);
  background: color-mix(in srgb, var(--color-paper) 8%, transparent);
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.site-footer__social-link:hover {
  transform: translateY(-1px);
  color: var(--color-paper);
  border-color: color-mix(in srgb, var(--color-tan) 55%, transparent);
  background: color-mix(in srgb, var(--color-paper) 16%, transparent);
}

.site-footer__social-link:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 2px;
}

.site-footer__col--nav,
.site-footer__col--meta,
.site-footer__col--legal {
  min-width: 0;
}

@media (min-width: 900px) {
  .site-footer__col--nav,
  .site-footer__col--meta,
  .site-footer__col--legal {
    padding-left: 1.15rem;
    border-left: 1px solid color-mix(in srgb, var(--color-paper) 8%, transparent);
  }
}

@media (max-width: 899px) {
  .site-footer__col--nav,
  .site-footer__col--meta,
  .site-footer__col--legal {
    padding-top: 0.85rem;
    border-top: 1px solid color-mix(in srgb, var(--color-paper) 8%, transparent);
  }
}

.site-footer__h {
  margin: 0 0 0.55rem;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-tan);
}

.site-footer__fine {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-paper) 48%, transparent);
}

.site-footer__fine--tight {
  margin-bottom: 0.5rem;
}

.site-footer__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__list--twocol {
  columns: 2;
  column-gap: 1.25rem;
}

@media (max-width: 380px) {
  .site-footer__list--twocol {
    columns: 1;
  }
}

.site-footer__list--twocol li {
  break-inside: avoid;
  margin-bottom: 0.32rem;
}

.site-footer__list a {
  display: inline-block;
  font-weight: 500;
  font-size: 0.82rem;
  color: color-mix(in srgb, var(--color-paper) 82%, transparent);
  text-decoration: none;
  padding: 0.08rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-footer__list a:hover {
  color: var(--color-paper);
  border-bottom-color: color-mix(in srgb, var(--color-tan) 50%, transparent);
}

.site-footer__specs--compact {
  margin: 0.5rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.site-footer__specs--compact div {
  margin: 0;
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 0.35rem 0.65rem;
  align-items: baseline;
}

.site-footer__specs--compact dt {
  margin: 0;
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-tan) 85%, transparent);
}

.site-footer__specs--compact dd {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.4;
  color: color-mix(in srgb, var(--color-paper) 62%, transparent);
}

.site-footer__colophon-inline {
  margin: 0.65rem 0 0;
  font-size: 0.68rem;
  line-height: 1.45;
  font-style: italic;
  color: color-mix(in srgb, var(--color-paper) 38%, transparent);
}

.site-footer__registry {
  padding: 0.55rem clamp(1.25rem, 4vw, 3rem) 0.65rem;
  border-top: 1px solid color-mix(in srgb, var(--color-paper) 7%, transparent);
  background: rgba(0, 0, 0, 0.14);
}

.site-footer__registry-inner {
  width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem 0.55rem;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  color: color-mix(in srgb, var(--color-paper) 44%, transparent);
  text-align: center;
}

.site-footer__registry-id {
  font-variant-numeric: tabular-nums;
}

.site-footer__registry-sep {
  opacity: 0.3;
}

.site-footer__registry-meta {
  opacity: 0.8;
}

.site-footer__bar {
  width: var(--container);
  margin: 0 auto;
  padding: 0.75rem clamp(1.25rem, 4vw, 3rem) 1.1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-top: 1px solid color-mix(in srgb, var(--color-paper) 8%, transparent);
}

@media (min-width: 800px) {
  .site-footer__bar {
    align-items: flex-start;
  }
}

.site-footer__bar-left {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.site-footer__copy {
  margin: 0;
  font-size: 0.76rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--color-paper) 50%, transparent);
  text-align: center;
}

@media (min-width: 800px) {
  .site-footer__copy {
    text-align: left;
  }
}

.site-footer__rights {
  color: color-mix(in srgb, var(--color-paper) 38%, transparent);
}

.site-footer__legal {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  gap: 0.4rem;
}

.site-footer__legal a {
  font-size: 0.74rem;
  font-weight: 600;
  color: color-mix(in srgb, var(--color-paper) 52%, transparent);
  text-decoration: none;
  padding: 0.15rem 0;
  transition: color 0.2s ease;
}

.site-footer__legal a:hover {
  color: var(--color-paper);
}

.site-footer__legal a:focus-visible {
  outline: 2px solid var(--color-tan);
  outline-offset: 2px;
  border-radius: 4px;
}

.site-footer__legal-sep {
  display: none;
}

.site-footer,
.site-footer p,
.site-footer span,
.site-footer dt,
.site-footer dd,
.site-footer h3,
.site-footer a {
  color: var(--color-offwhite) !important;
}

/* Unified modern card treatment */
.book-details__card,
.highlights__item,
.inside-list__item,
.facts-card,
.scope-aside,
.toc-panel,
.depth-block,
.quote__inner,
.faq__item {
  background: var(--color-offwhite);
  border: 1px solid color-mix(in srgb, var(--color-brown) 18%, transparent);
  box-shadow: none;
  transition:
    transform 0.28s var(--ease-out),
    box-shadow 0.28s var(--ease-out),
    border-color 0.28s ease,
    background 0.28s ease;
}

.book-details__card:hover,
.highlights__item:hover,
.inside-list__item:hover,
.facts-card:hover,
.scope-aside:hover,
.depth-block:hover,
.faq__item:hover {
  border-color: color-mix(in srgb, var(--color-brown) 30%, transparent);
  box-shadow: none;
  transform: translateY(-4px);
}

.theme-chips li {
  background: var(--color-offwhite);
  border: 1px solid color-mix(in srgb, var(--color-brown) 20%, transparent);
  box-shadow: none;
}

.theme-chips li:hover {
  border-color: color-mix(in srgb, var(--color-brown) 34%, transparent);
  box-shadow: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero__book-float {
    animation: none;
  }

  .hero__book-tilt {
    transition: none;
  }

  .hero__orbit-ring {
    animation: none;
  }

  .book-details__card:hover {
    border-color: color-mix(in srgb, var(--color-ink) 8%, transparent);
    box-shadow: var(--shadow-sm);
    transform: none;
  }

  .pillar:hover {
    transform: none;
  }

  .pillar:hover .pillar__icon {
    transform: none;
  }

  .highlights__item:hover {
    transform: none;
  }

  .inside-list__item:hover {
    transform: none;
  }

  .facts-card:hover {
    transform: none;
  }

  .theme-chips li:hover {
    transform: none;
  }

  .section-join__ring {
    animation: none;
  }
}