:root {
  color-scheme: dark;
  --book-bg: var(--semeai-graphite-950, #05080a);
  --book-bg-2: var(--semeai-graphite-900, #090d10);
  --book-surface: var(--semeai-graphite-850, #0d1216);
  --book-surface-2: #171b1f;
  --book-text: var(--semeai-white, #f5f7f7);
  --book-muted: var(--semeai-muted, #a5afb6);
  --book-faint: var(--semeai-faint, #68747c);
  --book-line: var(--semeai-line, rgba(244, 245, 246, 0.11));
  --book-line-strong: var(--semeai-line-strong, rgba(244, 245, 246, 0.2));
  --book-cyan: var(--semeai-cyan, #72e7ef);
  --book-green: #73e2a7;
  --book-warm: var(--semeai-gold, #d9bd78);
  --book-blue: #7da8ff;
  --book-violet: #a78bfa;
  --book-shadow: 0 32px 90px rgba(0, 0, 0, 0.42);
  --book-sans: var(--semeai-font-sans, Inter, ui-sans-serif, system-ui, sans-serif);
  --book-serif: var(--semeai-font-editorial, Georgia, serif);
  --book-mono: var(--semeai-font-mono, "SFMono-Regular", Consolas, ui-monospace, monospace);
  --nav-width: 20.5rem;
  --nav-rail-width: 4.25rem;
  --book-read-max: 46rem;
}

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

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body.book-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--book-sans);
  background:
    radial-gradient(circle at 78% 8%, rgba(114, 231, 239, 0.11), transparent 30rem),
    radial-gradient(circle at 12% 88%, rgba(114, 231, 239, 0.05), transparent 24rem),
    radial-gradient(circle at 50% 40%, rgba(217, 189, 120, 0.035), transparent 36rem),
    linear-gradient(180deg, #040607, var(--book-bg) 38%, var(--book-bg-2));
  color: var(--book-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Soften global site chrome while reading the Book */
body.book-body .site-header {
  background: rgba(4, 6, 7, 0.72);
  border-bottom-color: rgba(255, 255, 255, 0.05);
}

body.book-body .site-nav .nav-link {
  opacity: 0.78;
}

body.book-body .site-nav .nav-link:hover,
body.book-body .site-nav .nav-link[aria-current="page"] {
  opacity: 1;
}

body.book-body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 45%, black, transparent 78%);
  z-index: 0;
}

body.book-body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 20% 16%, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px),
    radial-gradient(circle at 76% 36%, rgba(255, 255, 255, 0.06) 0 1px, transparent 1px),
    radial-gradient(circle at 42% 72%, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px),
    radial-gradient(circle at 88% 82%, rgba(255, 255, 255, 0.06) 0 1px, transparent 1px);
  background-size: 240px 240px;
  opacity: 0.55;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.book-skip {
  position: fixed;
  left: 1rem;
  top: calc(var(--semeai-nav-height, 4rem) + 1rem);
  z-index: 100;
  transform: translateY(calc(-100% - var(--semeai-nav-height, 4rem) - 2rem));
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--book-text);
  color: var(--book-bg);
  font-weight: 700;
}

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

.book-progress {
  position: fixed;
  inset: var(--semeai-nav-height, 4rem) 0 auto 0;
  height: 2px;
  z-index: 80;
  background: rgba(255, 255, 255, 0.035);
  transform: translateZ(0);
}

.book-progress span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0.02);
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(114, 231, 239, 0.35), var(--book-cyan) 48%, rgba(217, 189, 120, 0.75));
  transition: transform 0.35s ease;
}

.book-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--nav-width) minmax(0, 1fr);
  transition: grid-template-columns 0.28s ease;
}

body.book-nav-collapsed .book-shell {
  grid-template-columns: var(--nav-rail-width) minmax(0, 1fr);
}

.book-nav {
  position: sticky;
  top: var(--semeai-nav-height, 4rem);
  height: calc(100vh - var(--semeai-nav-height, 4rem));
  padding: 1.15rem 0.95rem 1.25rem;
  border-right: 1px solid var(--book-line);
  background: linear-gradient(180deg, rgba(7, 9, 11, 0.88), rgba(5, 7, 9, 0.78));
  backdrop-filter: blur(18px);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 0.85rem;
  z-index: 30;
}

.book-nav-head {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0 0.25rem;
}

.book-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  flex: 1;
}

.book-brand-mark {
  width: 2.15rem;
  height: 2.15rem;
  display: block;
  object-fit: contain;
  flex: 0 0 auto;
}

.book-brand-text {
  min-width: 0;
}

.book-brand strong,
.book-brand small {
  display: block;
}

.book-brand strong {
  font-size: 0.9rem;
  letter-spacing: -0.02em;
}

.book-brand small {
  color: var(--book-muted);
  font-size: 0.7rem;
}

.book-collapse-button {
  appearance: none;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--book-line);
  border-radius: 0.4rem;
  background: rgba(255, 255, 255, 0.03);
  color: var(--book-muted);
  cursor: pointer;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
}

.book-collapse-button:hover,
.book-collapse-button:focus-visible {
  border-color: rgba(114, 231, 239, 0.45);
  color: var(--book-text);
  outline: none;
}

.book-collapse-icon {
  width: 0.55rem;
  height: 0.55rem;
  border-left: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-left: 0.12rem;
}

body.book-nav-collapsed .book-collapse-icon {
  transform: rotate(-135deg);
  margin-left: 0;
  margin-right: 0.12rem;
}

.book-menu-button {
  display: none;
}

.book-nav-body {
  min-height: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 0.85rem;
}

.book-nav-scroll {
  position: relative;
  min-height: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 0.45rem;
}

.book-nav-scroll::before,
.book-nav-scroll::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0.2rem;
  height: 1.1rem;
  pointer-events: none;
  z-index: 2;
}

.book-nav-scroll::before {
  top: 1.5rem;
  background: linear-gradient(180deg, rgba(5, 7, 9, 0.95), transparent);
}

.book-nav-scroll::after {
  bottom: 0;
  background: linear-gradient(0deg, rgba(5, 7, 9, 0.95), transparent);
}

.book-nav-label {
  margin: 0;
  padding: 0 0.55rem;
  color: var(--book-faint);
  font-family: var(--book-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.book-nav-list {
  list-style: none;
  margin: 0;
  padding: 0.15rem 0.15rem 0.85rem;
  overflow: auto;
  display: grid;
  align-content: start;
  gap: 0.12rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(114, 231, 239, 0.22) transparent;
}

.book-nav-list::-webkit-scrollbar {
  width: 6px;
}

.book-nav-list::-webkit-scrollbar-thumb {
  background: rgba(114, 231, 239, 0.18);
  border-radius: 999px;
}

.book-nav-list a {
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  gap: 0.55rem;
  align-items: baseline;
  min-height: 2.35rem;
  padding: 0.48rem 0.55rem;
  border-radius: 0.35rem;
  border-left: 1px solid transparent;
  color: var(--book-muted);
  font-size: 0.8rem;
  line-height: 1.3;
  transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.book-nav-list a:hover,
.book-nav-list a:focus-visible {
  color: var(--book-text);
  background: rgba(255, 255, 255, 0.03);
  outline: none;
}

.book-nav-list a.active {
  color: #f3efe4;
  background: rgba(114, 231, 239, 0.045);
  border-left-color: rgba(114, 231, 239, 0.72);
}

.book-nav-num {
  color: var(--book-faint);
  font-family: var(--book-mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
}

.book-nav-list a.active .book-nav-num {
  color: var(--book-cyan);
}

.book-nav-title {
  min-width: 0;
}

.book-nav-utility {
  display: grid;
  gap: 0.55rem;
  padding: 0.85rem 0.45rem 0.15rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.book-utility-identity {
  color: var(--book-warm);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.book-utility-print {
  appearance: none;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 2.3rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid rgba(114, 231, 239, 0.28);
  border-radius: 0.35rem;
  background: rgba(114, 231, 239, 0.05);
  color: var(--book-text);
  cursor: pointer;
  font-size: 0.74rem;
  font-weight: 700;
}

.book-utility-print:hover,
.book-utility-print:focus-visible {
  border-color: rgba(114, 231, 239, 0.55);
  outline: none;
}

.book-utility-links {
  display: grid;
  gap: 0.28rem;
}

.book-utility-links a {
  color: var(--book-faint);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.18rem 0;
}

.book-utility-links a:hover,
.book-utility-links a:focus-visible {
  color: var(--book-cyan);
  outline: none;
}

.book-keyboard-hint {
  margin: 0.15rem 0 0;
  color: rgba(104, 116, 124, 0.9);
  font-size: 0.62rem;
  line-height: 1.4;
}

/* Collapsed publication rail */
.book-nav-rail {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  padding: 0.35rem 0 0.5rem;
}

body.book-nav-collapsed .book-nav-head .book-brand-text,
body.book-nav-collapsed .book-nav-body,
body.book-nav-collapsed .book-collapse-button {
  display: none;
}

body.book-nav-collapsed .book-nav-rail {
  display: flex;
}

body.book-nav-collapsed .book-nav {
  padding-inline: 0.45rem;
  justify-items: center;
}

.book-rail-mark {
  width: 1.35rem;
  height: 1.35rem;
  border: 1px solid rgba(114, 231, 239, 0.45);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px rgba(114, 231, 239, 0.12);
}

.book-rail-chapter {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.book-rail-progress {
  width: 2px;
  height: 4.5rem;
  background: rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.book-rail-progress::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 100%;
  background: linear-gradient(0deg, var(--book-cyan), rgba(217, 189, 120, 0.7));
  transform: scaleY(0.08);
  transform-origin: bottom center;
  transition: transform 0.35s ease;
}

.book-rail-expand {
  appearance: none;
  width: 1.7rem;
  height: 1.7rem;
  border: 1px solid var(--book-line);
  border-radius: 0.35rem;
  background: transparent;
  color: var(--book-muted);
  cursor: pointer;
}

.book-rail-expand:hover,
.book-rail-expand:focus-visible {
  color: var(--book-text);
  border-color: rgba(114, 231, 239, 0.45);
  outline: none;
}

.book-main {
  min-width: 0;
  max-width: 100%;
}

.book-start {
  display: grid;
  gap: 1.25rem;
  padding: clamp(3rem, 7vw, 6.5rem);
  border-bottom: 1px solid var(--book-line);
  background: linear-gradient(135deg, rgba(216, 196, 143, 0.06), rgba(102, 217, 232, 0.025));
}
.book-start h2 {
  max-width: 15ch;
  margin: 0;
  font-family: var(--book-serif);
  font-weight: 500;
  font-size: clamp(2.3rem, 5vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}
.book-start > p:not(.book-kicker) {
  max-width: 48rem;
  margin: 0;
  color: var(--book-muted);
  line-height: 1.7;
}
.book-start ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
}
.book-start a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.8rem;
  min-height: 5rem;
  padding: 0.9rem;
  border: 1px solid var(--book-line);
  background: rgba(255, 255, 255, 0.025);
}
.book-start a:hover,
.book-start a:focus-visible { border-color: rgba(216, 196, 143, 0.5); }
.book-start a span { grid-row: 1 / span 2; color: var(--book-warm); font-family: var(--book-mono); font-size: 0.72rem; }
.book-start a strong { color: var(--book-text); }
.book-start a small { color: var(--book-muted); line-height: 1.45; }

.book-context-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}
.book-context-links a {
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--book-line-strong);
  color: var(--book-muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.book-context-links a:hover,
.book-context-links a:focus-visible { border-color: var(--book-warm); color: var(--book-text); }

.book-page {
  position: relative;
  min-height: 100vh;
  scroll-margin-top: calc(var(--semeai-nav-height, 4rem) + 0.75rem);
  padding: clamp(3.5rem, 7vw, 7rem) clamp(2rem, 7vw, 7.5rem);
  display: grid;
  align-content: center;
  border-bottom: 1px solid var(--book-line);
  overflow: hidden;
}

.book-page.is-entering {
  animation: bookChapterEnter 0.48s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.book-page::before {
  content: attr(data-chapter);
  position: absolute;
  right: clamp(1.25rem, 5vw, 4.5rem);
  top: clamp(1.5rem, 5vw, 3.5rem);
  color: rgba(255, 255, 255, 0.045);
  font-family: var(--book-mono);
  font-size: clamp(3.5rem, 11vw, 10rem);
  font-weight: 700;
  line-height: 0.8;
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.45s ease;
}

.book-page.is-entering::before {
  transform: translateY(0.45rem);
  opacity: 0.7;
}

.book-chapter-meta {
  position: absolute;
  left: clamp(2rem, 8vw, 8rem);
  top: clamp(1.5rem, 5vw, 4rem);
  display: flex;
  gap: 0.75rem;
  align-items: center;
  color: var(--book-faint);
  font-family: var(--book-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.book-chapter-meta span:first-child {
  color: var(--book-cyan);
}

.book-kicker {
  margin: 0 0 1.1rem;
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.book-page h1,
.book-page h2 {
  margin: 0;
  font-weight: 760;
  letter-spacing: -0.055em;
}

.book-page h1 span,
.book-page h2 span {
  display: block;
}

.book-page h1 {
  max-width: min(16ch, 100%);
  font-size: clamp(3.8rem, 8.5vw, 8.8rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
}

.book-page h2 {
  max-width: min(16ch, 100%);
  font-size: clamp(2.7rem, 6.2vw, 6.2rem);
  line-height: 0.94;
}

.book-page p {
  color: var(--book-muted);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.65;
}

.book-page--cover {
  min-height: 100vh;
  align-content: space-between;
  padding-top: clamp(3.5rem, 7vw, 7rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
  grid-template-rows: 1fr auto auto;
}

.book-page--cover::before {
  display: none;
}

.book-field {
  position: absolute;
  inset: 0;
  opacity: 1;
  pointer-events: none;
  display: grid;
  place-items: center;
}

.book-field-svg {
  width: min(60vw, 44rem);
  max-width: 92%;
  height: auto;
  opacity: 0.92;
  transform: translate(19%, -2%);
}

.book-field-boundaries {
  fill: none;
  stroke: rgba(114, 231, 239, 0.18);
  stroke-width: 1;
  transform-box: fill-box;
  transform-origin: center;
  animation: bookBoundaryDrift 42s ease-in-out infinite;
}

.book-field-boundaries .is-inner {
  stroke: rgba(217, 189, 120, 0.16);
  stroke-dasharray: 4 12;
}

.book-field-boundaries .is-architecture {
  stroke: rgba(151, 134, 171, 0.28);
  stroke-width: 1.15;
}

.book-field-path {
  fill: none;
  stroke: url("#bookFieldTrace");
  stroke-width: 1.25;
  stroke-linecap: round;
}

.book-field-path.is-released {
  stroke-dasharray: 14 86;
  filter: drop-shadow(0 0 4px rgba(114, 231, 239, 0.18));
  animation: bookEvidenceFlow 18s linear calc(var(--i) * -1.7s) infinite;
}

.book-field-path.is-held {
  stroke: rgba(114, 231, 239, 0.2);
  stroke-width: 0.9;
  stroke-dasharray: 5 11;
}

.book-field-path.is-violet {
  stroke: rgba(151, 134, 171, 0.52);
}

.book-field-path.is-gold {
  stroke: rgba(217, 189, 120, 0.58);
}

.book-field-point {
  fill: #72e7ef;
  opacity: 0.72;
  transform-box: fill-box;
  transform-origin: center;
  animation: bookPointBreathe 9s ease-in-out calc(var(--i) * -0.8s) infinite;
}

.book-field-point.is-gold {
  fill: #d9bd78;
}

.book-field-point.is-violet {
  fill: #9786ab;
}

.book-field-point.is-held {
  opacity: 0.32;
}

.book-field-origin path {
  fill: none;
  stroke: rgba(217, 189, 120, 0.42);
  stroke-width: 1;
}

.book-field-core {
  fill: #f1d99f;
  filter: drop-shadow(0 0 7px rgba(217, 189, 120, 0.65));
}

.book-field-core-ring {
  fill: none;
  stroke: rgba(114, 231, 239, 0.4);
  stroke-width: 1;
  transform-origin: 232px 406px;
  animation: bookCorePulse 7s ease-in-out infinite;
}

.book-field.is-motion-paused *,
.book-field.is-motion-paused::before {
  animation-play-state: paused !important;
}

.book-field[data-motion-state="paused"] *,
.book-field[data-motion-state="paused"]::before {
  animation-play-state: paused !important;
}

.book-field[data-motion-phase] .book-field-boundaries,
.book-field[data-motion-phase] .book-field-point,
.book-field[data-motion-phase] .book-field-core-ring {
  animation: none;
  transition:
    opacity 1.15s cubic-bezier(0.22, 1, 0.36, 1),
    transform 1.15s cubic-bezier(0.22, 1, 0.36, 1),
    stroke-dashoffset 1.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-field[data-motion-phase] .book-field-path {
  transition:
    opacity 1.15s cubic-bezier(0.22, 1, 0.36, 1),
    transform 1.15s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-field-persistent {
  fill: none;
  stroke: rgba(217, 189, 120, 0.66);
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
  opacity: 0.18;
  filter: drop-shadow(0 0 5px rgba(217, 189, 120, 0.16));
  transition:
    opacity 1.2s cubic-bezier(0.22, 1, 0.36, 1),
    stroke-dashoffset 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-field-receipt {
  fill: rgba(4, 6, 7, 0.88);
  stroke: rgba(217, 189, 120, 0.72);
  stroke-width: 1;
  opacity: 0.2;
  transform-box: fill-box;
  transform-origin: center;
  transform: scale(0.84);
  transition: opacity 1.1s ease, transform 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-field[data-motion-phase="candidate"] .book-field-core,
.book-field[data-motion-phase="candidate"] .book-field-core-ring {
  opacity: 0.94;
  transform: scale(1.08);
}

.book-field[data-motion-phase="candidate"] .book-field-boundaries {
  opacity: 0.14;
}

.book-field[data-motion-phase="candidate"] .book-field-path {
  stroke-dasharray: 100;
  stroke-dashoffset: 82;
  opacity: 0.12;
}

.book-field[data-motion-phase="candidate"] .book-field-point {
  opacity: 0.12;
  transform: scale(0.78);
}

.book-field[data-motion-phase="candidate"] .book-field-persistent {
  stroke-dashoffset: 64;
  opacity: 0.28;
}

.book-field[data-motion-phase="candidate"] .book-field-receipt {
  opacity: 0.3;
  transform: scale(0.88);
}

.book-field[data-motion-phase="paths"] .book-field-path {
  stroke-dasharray: 100;
  stroke-dashoffset: 0;
  opacity: 0.54;
}

.book-field[data-motion-phase="paths"] .book-field-boundaries {
  opacity: 0.24;
}

.book-field[data-motion-phase="paths"] .book-field-point {
  opacity: 0.5;
  transform: scale(0.9);
}

.book-field[data-motion-phase="evidence"] .book-field-path.is-released {
  stroke-dasharray: 14 86;
  stroke-dashoffset: -20;
  opacity: 0.84;
}

.book-field[data-motion-phase="evidence"] .book-field-boundaries {
  opacity: 0.38;
}

.book-field[data-motion-phase="evidence"] .book-field-path.is-held {
  stroke-dasharray: 5 11;
  stroke-dashoffset: -8;
  opacity: 0.14;
}

.book-field[data-motion-phase="evidence"] .book-field-point:not(.is-held) {
  opacity: 0.8;
  transform: scale(1.05);
}

.book-field[data-motion-phase="evidence"] .book-field-point.is-held {
  opacity: 0.2;
  transform: scale(0.82);
}

.book-field[data-motion-phase="boundary"] .book-field-boundaries {
  opacity: 0.88;
  transform: translate(0.08rem, -0.04rem) scale(1.003);
}

.book-field[data-motion-phase="boundary"] .book-field-path.is-released {
  opacity: 0.68;
}

.book-field[data-motion-phase="boundary"] .book-field-path.is-held {
  opacity: 0.12;
}

.book-field[data-motion-phase="trace"] .book-field-boundaries {
  opacity: 0.66;
  transform: none;
}

.book-field[data-motion-phase="trace"] .book-field-path.is-released {
  opacity: 0.46;
}

.book-field[data-motion-phase="trace"] .book-field-path.is-held {
  opacity: 0.1;
}

.book-field[data-motion-phase="trace"] .book-field-persistent {
  stroke-dashoffset: 0;
  opacity: 0.94;
}

.book-field[data-motion-phase="trace"] .book-field-receipt {
  opacity: 0.94;
  transform: scale(1);
}

.book-continuity-field {
  position: fixed;
  z-index: 0;
  top: calc(var(--semeai-nav-height, 4rem) + 5vh);
  right: clamp(1rem, 4vw, 4.5rem);
  width: clamp(7rem, 14vw, 12rem);
  height: min(76vh, 46rem);
  pointer-events: none;
  opacity: 0.28;
  transition: opacity 0.6s ease;
}

.book-continuity-field svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
  transform: translateY(var(--book-continuity-shift, 0)) rotate(var(--book-continuity-turn, 0deg));
  transform-origin: 72% 48%;
  transition: transform 0.82s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-continuity-boundary,
.book-continuity-thread {
  fill: none;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.book-continuity-boundary {
  stroke: rgba(217, 189, 120, 0.34);
  stroke-width: 1;
  stroke-dasharray: 4 13;
}

.book-continuity-thread {
  stroke: rgba(114, 231, 239, 0.32);
  stroke-width: 1.15;
  stroke-dasharray: 12 88;
  stroke-dashoffset: var(--book-continuity-dash, 0);
  transition: stroke-dashoffset 0.86s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.6s ease;
}

.book-continuity-thread.is-secondary {
  stroke: rgba(151, 134, 171, 0.3);
  stroke-width: 0.9;
  opacity: calc(0.28 + var(--book-continuity-progress, 0) * 0.5);
}

.book-continuity-node {
  fill: var(--book-cyan);
  opacity: 0.58;
  filter: drop-shadow(0 0 5px rgba(114, 231, 239, 0.34));
}

.book-continuity-receipt {
  fill: rgba(4, 6, 7, 0.9);
  stroke: var(--book-warm);
  stroke-width: 1;
  opacity: calc(0.36 + var(--book-continuity-progress, 0) * 0.48);
}

.book-continuity-field.is-reorganizing .book-continuity-thread {
  animation: bookContinuityReorganize 0.86s cubic-bezier(0.22, 1, 0.36, 1) 1 both;
}

body[data-book-chapter="cover"] .book-continuity-field {
  opacity: 0;
}

.book-page,
.book-start {
  z-index: 1;
}

.book-cover-copy {
  position: relative;
  z-index: 1;
  max-width: min(42rem, 100%);
  min-width: 0;
}

.book-cover-footer {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  margin-top: 2rem;
}

.book-cover-author {
  display: grid;
  gap: 0.25rem;
}

.book-cover-author span {
  color: var(--book-muted);
  font-size: 0.92rem;
}

.book-cover-author span:first-child {
  color: #f3efe4;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.book-cover-number {
  color: rgba(255, 255, 255, 0.08);
  font-family: var(--book-mono);
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.04em;
}

.book-chapter-turn {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  max-width: var(--book-read-max);
}

.book-turn {
  display: grid;
  gap: 0.35rem;
  min-height: 3.4rem;
  padding: 0.7rem 0.15rem;
  color: var(--book-muted);
  border-bottom: 1px solid transparent;
}

.book-turn small {
  font-family: var(--book-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--book-faint);
}

.book-turn strong {
  display: flex;
  gap: 0.55rem;
  align-items: baseline;
  color: var(--book-text);
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.book-turn strong span {
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.72rem;
}

.book-turn:hover,
.book-turn:focus-visible {
  border-bottom-color: rgba(114, 231, 239, 0.45);
  outline: none;
}

.book-turn--next {
  text-align: right;
  justify-items: end;
}

.book-turn--empty {
  border: 0;
}

.book-cover-subtitle {
  width: 100%;
  max-width: min(38rem, 100%);
  margin-top: 2rem;
  overflow-wrap: break-word;
}

.book-cover-subtitle span {
  display: inline;
}

.book-cover-subtitle span:not(:last-child)::after {
  content: " ";
}

.book-page--statement {
  justify-items: start;
}

.book-page--statement h2,
.book-page--poster h2 {
  max-width: 15ch;
}

.book-page--emphasis h2 {
  color: #fff;
  text-shadow: 0 0 70px rgba(102, 217, 232, 0.17);
}

.book-inline-meta,
.book-statement-note {
  max-width: 40rem;
  margin-top: 2rem;
  font-family: var(--book-mono);
  color: var(--book-cyan) !important;
}

.book-editorial-copy {
  max-width: min(var(--book-read-max), 100%);
}

.book-editorial-copy h2 {
  max-width: 18ch;
  margin-bottom: 2rem;
}

.book-editorial-copy p {
  max-width: 48rem;
}

.book-author-grid,
.book-product-grid,
.book-stack-grid,
.book-method-grid,
.book-diagram-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(22rem, 1.1fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
}

.book-author-grid h2,
.book-product-grid h2,
.book-stack-grid h2,
.book-method-grid h2,
.book-diagram-grid h2,
.principles-head h2,
.book-page--timeline h2,
.book-page--proof h2,
.book-page--negative h2,
.book-page--focus h2 {
  max-width: 14ch;
  font-size: clamp(3rem, 6.2vw, 7rem);
  line-height: 0.94;
}

.book-lead {
  color: var(--book-text) !important;
  max-width: 34rem;
}

.book-author-card {
  min-height: 26rem;
  border: 1px solid var(--book-line);
  border-radius: 2rem;
  background:
    radial-gradient(circle at 50% 34%, rgba(102, 217, 232, 0.2), transparent 14rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  display: grid;
  place-items: center;
  box-shadow: var(--book-shadow);
}

.book-portrait-placeholder {
  width: 14rem;
  height: 14rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--book-muted);
}

.book-portrait-placeholder span {
  font-size: 4rem;
  font-weight: 800;
  color: var(--book-text);
}

.book-portrait-placeholder small {
  grid-column: 1;
  color: var(--book-faint);
}

.book-author-body {
  grid-column: 1 / -1;
  max-width: 54rem;
}

.release-flow {
  display: grid;
  gap: 0.9rem;
}

.release-flow-step {
  display: grid;
  grid-template-columns: 4rem 1fr;
  align-items: center;
  min-height: 4.7rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--book-line);
  background: rgba(255, 255, 255, 0.035);
}

.release-flow-step span {
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.8rem;
}

.release-flow-step strong {
  font-size: clamp(1.2rem, 2vw, 1.75rem);
}

.decision-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 4rem;
}

.decision-tile,
.principles-grid article,
.proof-grid article,
.focus-row article,
.metrics-grid article {
  border: 1px solid var(--book-line);
  background: rgba(255, 255, 255, 0.035);
  padding: 1.35rem;
}

.decision-tile strong,
.decision-tile span {
  display: block;
}

.decision-tile strong {
  color: var(--book-text);
  font-size: 1.4rem;
}

.decision-tile span {
  margin-top: 0.3rem;
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.78rem;
}

.book-ecosystem-copy {
  max-width: 52rem;
  margin-bottom: clamp(2rem, 4vw, 4rem);
}

.ecosystem-diagram {
  position: relative;
  min-height: 32rem;
  border: 1px solid var(--book-line);
  border-radius: 2rem;
  background:
    radial-gradient(circle at 50% 50%, rgba(102, 217, 232, 0.12), transparent 17rem),
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  overflow: hidden;
}

.ecosystem-diagram::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px solid rgba(102, 217, 232, 0.16);
  box-shadow: 0 0 60px rgba(102, 217, 232, 0.08);
}

.ecosystem-core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 13rem;
  height: 7rem;
  border-radius: 1.3rem;
  display: grid;
  place-items: center;
  border: 1px solid rgba(216, 196, 143, 0.55);
  background: rgba(7, 8, 9, 0.82);
  font-size: 1.45rem;
  font-weight: 800;
  box-shadow: 0 0 50px rgba(102, 217, 232, 0.12);
}

.ecosystem-node {
  position: absolute;
  min-width: 11rem;
  max-width: 15rem;
  min-height: 3.3rem;
  border: 1px solid var(--book-line-strong);
  border-radius: 999px;
  background: rgba(17, 20, 23, 0.9);
  color: var(--book-text);
  cursor: pointer;
  padding: 0.8rem 1rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.ecosystem-node:hover,
.ecosystem-node:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(102, 217, 232, 0.7);
  outline: none;
}

.ecosystem-node--1 { left: 10%; top: 16%; }
.ecosystem-node--2 { right: 10%; top: 16%; }
.ecosystem-node--3 { left: 7%; top: 48%; }
.ecosystem-node--4 { right: 7%; top: 48%; }
.ecosystem-node--5 { left: 18%; bottom: 13%; }
.ecosystem-node--6 { right: 18%; bottom: 13%; }
.ecosystem-node--7 { left: 50%; bottom: 5%; transform: translateX(-50%); }
.ecosystem-node--7:hover,
.ecosystem-node--7:focus-visible { transform: translateX(-50%) translateY(-3px); }

.book-product-frame {
  min-height: 26rem;
  border: 1px solid var(--book-line);
  border-radius: 1.8rem;
  background:
    radial-gradient(circle at 70% 18%, rgba(115, 226, 167, 0.13), transparent 10rem),
    rgba(255, 255, 255, 0.035);
  padding: 1.1rem;
  box-shadow: var(--book-shadow);
}

.frame-top {
  display: flex;
  gap: 0.45rem;
  padding-bottom: 1rem;
}

.frame-top span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--book-line-strong);
}

.frame-lines {
  display: grid;
  gap: 0.8rem;
}

.frame-lines span {
  padding: 1rem;
  border: 1px solid var(--book-line);
  border-radius: 0.9rem;
  color: var(--book-muted);
  background: rgba(0, 0, 0, 0.15);
}

.runtime-stack {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.runtime-stack li {
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  align-items: center;
  padding: 1rem 1.1rem;
  border: 1px solid var(--book-line);
  background: rgba(255, 255, 255, 0.035);
}

.runtime-stack li span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--book-cyan);
  box-shadow: 0 0 22px rgba(102, 217, 232, 0.5);
}

.metrics-title h2 {
  max-width: 8ch;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 4rem;
}

.metrics-grid strong {
  display: block;
  font-size: clamp(2.6rem, 4.6vw, 5.8rem);
  letter-spacing: -0.06em;
}

.metrics-grid span {
  display: block;
  color: var(--book-text);
  font-weight: 700;
}

.metrics-grid p {
  font-size: 0.92rem;
}

.method-cycle {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.method-cycle li {
  min-height: 5rem;
  padding: 1rem;
  border: 1px solid var(--book-line);
  background: rgba(255, 255, 255, 0.035);
  font-weight: 750;
  display: grid;
  gap: 0.65rem;
}

.method-cycle span {
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.75rem;
}

.principles-grid,
.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.principles-grid strong {
  display: block;
  font-size: 1.35rem;
}

.principles-grid p {
  font-size: 1rem;
}

.evolution-line {
  list-style: none;
  margin: 4rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--book-line);
  background: var(--book-line);
}

.evolution-line li {
  min-height: 8rem;
  padding: 1.1rem;
  background: var(--book-bg-2);
  display: grid;
  align-content: space-between;
  font-weight: 700;
}

.evolution-line span {
  color: var(--book-cyan);
  font-family: var(--book-mono);
  font-size: 0.75rem;
}

.proof-grid article {
  min-height: 7.5rem;
  display: flex;
  align-items: flex-end;
  color: var(--book-text);
  font-weight: 700;
}

.book-page--negative {
  grid-template-columns: minmax(0, 0.9fr) minmax(20rem, 1fr);
  gap: 4rem;
  align-items: center;
}

.not-claims {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.not-claims li {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(248, 113, 113, 0.22);
  color: var(--book-muted);
  background: rgba(248, 113, 113, 0.035);
}

.focus-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 4rem;
}

.focus-row article {
  min-height: 14rem;
  display: grid;
  place-items: center;
  font-size: clamp(1.8rem, 3vw, 3rem);
  font-weight: 760;
  letter-spacing: -0.04em;
}

.book-page--back {
  align-content: space-between;
}

.book-page--back h2 {
  font-size: clamp(5rem, 14vw, 15rem);
}

.book-page--back p {
  color: var(--book-text);
}

.back-links {
  display: grid;
  gap: 0.8rem;
  max-width: 52rem;
}

.back-links a {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--book-line);
  color: var(--book-text);
  font-weight: 750;
}

.back-links span {
  color: var(--book-muted);
  font-family: var(--book-mono);
  font-size: 0.82rem;
  word-break: break-word;
}

@keyframes bookContinuityReorganize {
  0% {
    opacity: 0.16;
    stroke-dashoffset: calc(var(--book-continuity-dash, 0) - 18);
  }
  100% {
    opacity: 1;
    stroke-dashoffset: var(--book-continuity-dash, 0);
  }
}

@keyframes bookChapterEnter {
  from {
    opacity: 0.35;
    transform: translateY(0.7rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bookCorePulse {
  0%,
  100% {
    opacity: 0.35;
    transform: scale(0.92);
  }
  50% {
    opacity: 0.85;
    transform: scale(1.08);
  }
}

@keyframes bookEvidenceFlow {
  from {
    stroke-dashoffset: 0;
  }
  to {
    stroke-dashoffset: -100;
  }
}

@keyframes bookBoundaryDrift {
  0%,
  100% {
    transform: translate(-0.16rem, 0.08rem) scale(0.997);
  }
  52% {
    transform: translate(0.2rem, -0.1rem) scale(1.004);
  }
}

@keyframes bookPointBreathe {
  0%,
  100% {
    opacity: 0.42;
    transform: scale(0.86);
  }
  50% {
    opacity: 0.86;
    transform: scale(1.12);
  }
}

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

  .book-field-boundaries,
  .book-field-core-ring,
  .book-field-point,
  .book-field-path,
  .book-field-persistent,
  .book-field-receipt,
  .book-continuity-field *,
  .book-page.is-entering,
  .book-progress span {
    animation: none !important;
    transition: none !important;
  }

  .book-field-boundaries {
    transform: none !important;
  }
}

@media (max-width: 1120px) {
  .book-shell,
  body.book-nav-collapsed .book-shell {
    grid-template-columns: 1fr;
  }

  .book-nav,
  body.book-nav-collapsed .book-nav {
    position: sticky;
    top: var(--semeai-nav-height, 4rem);
    height: auto;
    padding: 0.85rem 1rem;
    border-right: none;
    border-bottom: 1px solid var(--book-line);
    display: grid;
    grid-template-rows: auto;
  }

  .book-collapse-button,
  .book-nav-rail,
  body.book-nav-collapsed .book-nav-rail {
    display: none !important;
  }

  body.book-nav-collapsed .book-nav-head .book-brand-text,
  body.book-nav-collapsed .book-nav-body {
    display: initial;
  }

  body.book-nav-collapsed .book-nav-body {
    display: none;
  }

  .book-menu-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.3rem;
    padding: 0.6rem 0.9rem;
    border: 1px solid var(--book-line-strong);
    border-radius: var(--semeai-radius-control, 0.48rem);
    background: rgba(255, 255, 255, 0.04);
    color: var(--book-text);
  }

  .book-nav-body {
    display: none;
  }

  .book-nav-open .book-nav-body {
    display: grid;
    margin-top: 0.75rem;
    max-height: min(70vh, 32rem);
  }

  .book-nav-list {
    grid-template-columns: 1fr;
    max-height: min(46vh, 22rem);
  }

  .book-nav-scroll::before,
  .book-nav-scroll::after {
    display: none;
  }

  .book-field-svg {
    transform: translate(8%, 0);
    width: min(70vw, 28rem);
    opacity: 0.75;
  }

  .book-keyboard-hint {
    display: none;
  }
}

@media (max-width: 820px) {
  .book-start { padding: 5rem 1.25rem; }
  .book-start ol { grid-template-columns: 1fr; }
  .book-page {
    min-height: auto;
    padding: 6rem 1.25rem;
  }

  .book-page::before {
    font-size: 5rem;
    right: 1rem;
  }

  .book-chapter-meta {
    left: 1.25rem;
  }

  .book-page h1 {
    font-size: clamp(3.6rem, 14vw, 5.4rem);
    overflow-wrap: break-word;
  }

  .book-page--cover h1 {
    max-width: calc(100vw - 2.5rem);
    font-size: clamp(3.15rem, 12.5vw, 4.75rem);
  }

  .book-page h2 {
    font-size: clamp(2.45rem, 11vw, 4.2rem);
    overflow-wrap: break-word;
  }

  .book-cover-copy,
  .book-cover-footer,
  .book-editorial-copy {
    width: 100%;
    max-width: calc(100vw - 2.5rem);
    min-width: 0;
  }

  .book-cover-subtitle {
    display: block;
    max-width: 100%;
    font-size: 1.02rem;
    line-height: 1.65;
    overflow-wrap: normal;
    word-break: normal;
  }

  .book-cover-subtitle span {
    display: block;
  }

  .book-chapter-turn {
    padding-right: 5.4rem;
  }

  .book-author-grid,
  .book-product-grid,
  .book-stack-grid,
  .book-method-grid,
  .book-diagram-grid,
  .book-page--negative {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .decision-row,
  .metrics-grid,
  .principles-grid,
  .proof-grid,
  .focus-row,
  .evolution-line {
    grid-template-columns: 1fr;
  }

  .book-nav-list {
    grid-template-columns: 1fr 1fr;
  }

  .book-nav-actions {
    grid-template-columns: 1fr;
  }

  .ecosystem-diagram {
    min-height: 44rem;
  }

  .ecosystem-node {
    position: relative;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
    transform: none !important;
    display: block;
    width: calc(100% - 2rem);
    margin: 0.55rem auto;
  }

  .ecosystem-core {
    position: relative;
    left: auto;
    top: auto;
    transform: none;
    margin: 2rem auto 1rem;
  }
}

@media print {
  @page {
    size: A4 landscape;
    margin: 10mm;
  }

  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
    animation: none !important;
    transition: none !important;
  }

  html,
  body.book-body {
    background: var(--book-bg) !important;
    color: var(--book-text) !important;
  }

  body.book-body::before,
  body.book-body::after,
  .site-header,
  .book-progress,
  .book-nav,
  .book-skip,
  .book-continuity-field,
  .book-chapter-turn,
  .book-context-links,
  .book-keyboard-hint,
  .site-footer,
  .book-start {
    display: none !important;
  }

  .book-shell {
    display: block;
  }

  .book-main {
    display: block !important;
    width: 100% !important;
  }

  .book-page {
    display: grid !important;
    position: relative !important;
    opacity: 1 !important;
    transform: none !important;
    min-height: 190mm;
    height: 190mm;
    width: 100%;
    padding: 12mm 14mm;
    overflow: visible;
    break-after: page;
    page-break-after: always;
    border-bottom: 0;
    box-shadow: none;
    background: #070809 !important;
    color: #f4f5f6 !important;
  }

  .book-page *,
  .book-page h1,
  .book-page h2,
  .book-page p,
  .book-page strong,
  .book-page span,
  .book-page li,
  .book-page a {
    color: inherit !important;
    text-shadow: none !important;
  }

  .book-field {
    display: grid !important;
    opacity: 0.46 !important;
  }

  .book-field-svg {
    display: block !important;
    width: 48% !important;
    max-width: none !important;
    opacity: 0.86 !important;
    transform: translate(48%, -1%) !important;
  }

  .book-field-boundaries {
    opacity: 0.56 !important;
    transform: none !important;
  }

  .book-field-path.is-released {
    opacity: 0.36 !important;
    stroke-dasharray: 14 86 !important;
    stroke-dashoffset: -20 !important;
  }

  .book-field-path.is-held {
    opacity: 0.08 !important;
  }

  .book-field-persistent {
    opacity: 0.84 !important;
    stroke-dashoffset: 0 !important;
  }

  .book-field-receipt {
    opacity: 0.84 !important;
    transform: scale(1) !important;
  }

  .book-cover-number {
    color: rgba(244, 245, 246, 0.08) !important;
  }

  .book-page::before {
    color: rgba(244, 245, 246, 0.06) !important;
  }

  .book-page:last-child {
    break-after: auto;
    page-break-after: auto;
  }

  .book-page h1 {
    font-size: 52pt;
  }

  .book-page h2 {
    font-size: 39pt;
  }

  .book-page p {
    font-size: 10.5pt;
    line-height: 1.48;
    color: #a2a8b0 !important;
  }

  .book-chapter-meta {
    left: 14mm;
    top: 8mm;
    color: #626a74 !important;
  }

  .book-kicker,
  .book-chapter-meta span:first-child,
  .book-inline-meta,
  .decision-tile span,
  .runtime-stack li span,
  .method-cycle span,
  .evolution-line span {
    color: #66d9e8 !important;
  }

  .book-author-grid,
  .book-product-grid,
  .book-stack-grid,
  .book-method-grid,
  .book-diagram-grid,
  .book-page--negative {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 8mm;
  }

  .book-author-grid {
    grid-template-columns: 0.78fr 0.62fr 1fr;
    gap: 7mm;
  }

  .book-author-card {
    min-height: 102mm;
    border-radius: 8mm;
  }

  .book-portrait-placeholder {
    width: 48mm;
    height: 48mm;
  }

  .book-author-body p {
    font-size: 9.5pt;
  }

  .book-ecosystem-copy {
    margin-bottom: 6mm;
  }

  .ecosystem-diagram {
    min-height: 104mm;
    height: 104mm;
    border-radius: 7mm;
  }

  .book-page--diagram {
    align-content: start;
  }

  .book-diagram-grid {
    margin-top: 16mm;
    align-items: start;
  }

  .book-diagram-grid h2 {
    font-size: 34pt;
  }

  .release-flow {
    gap: 2.5mm;
  }

  .release-flow-step {
    grid-template-columns: 12mm 1fr;
    min-height: 0;
    padding: 3mm 4mm;
  }

  .release-flow-step strong {
    font-size: 12pt;
  }

  .decision-row {
    gap: 4mm;
    margin-top: 7mm;
  }

  .decision-tile {
    padding: 5mm;
  }

  .decision-tile strong {
    font-size: 14pt;
  }

  .decision-tile p {
    font-size: 9pt;
  }

  .metrics-grid,
  .principles-grid,
  .proof-grid,
  .focus-row,
  .decision-row {
    grid-template-columns: repeat(3, 1fr);
  }

  .metrics-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 4mm;
    margin-top: 9mm;
  }

  .metrics-grid article,
  .principles-grid article,
  .proof-grid article,
  .focus-row article {
    padding: 4mm;
  }

  .metrics-grid strong {
    font-size: 28pt;
  }

  .principles-grid,
  .proof-grid {
    gap: 4mm;
    margin-top: 8mm;
  }

  .proof-grid article {
    min-height: 28mm;
  }

  .focus-row {
    gap: 4mm;
    margin-top: 9mm;
  }

  .focus-row article {
    min-height: 46mm;
    font-size: 24pt;
  }

  .evolution-line {
    grid-template-columns: repeat(5, 1fr);
  }

  .ecosystem-diagram,
  .book-product-frame,
  .book-author-card {
    box-shadow: none;
  }
}