@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  color-scheme: dark;
  --ink: #050608;
  --ink-soft: #0a0d12;
  --panel: #0d1118;
  --panel-strong: #111722;
  --line: rgba(255, 255, 255, 0.1);
  --line-bright: rgba(255, 255, 255, 0.18);
  --text: #f5f2ea;
  --muted: #9ca6b5;
  --muted-bright: #c6ccd5;
  --gold: #f5a916;
  --gold-soft: #ffc95a;
  --blue: #17b8ff;
  --blue-deep: #0374d9;
  --cyan: #3ce6ff;
  --max: 1240px;
  --header-h: 76px;
  --radius-sm: 14px;
  --radius-md: 24px;
  --radius-lg: 38px;
  --shadow: 0 32px 90px rgba(0, 0, 0, 0.48);
}

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

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 82% 9%, rgba(0, 139, 232, 0.14), transparent 27rem),
    radial-gradient(circle at 15% 36%, rgba(245, 169, 22, 0.06), transparent 30rem),
    var(--ink);
  color: var(--text);
  font-family: "Manrope", "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.74), transparent 85%);
  content: "";
  pointer-events: none;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
}

::selection {
  background: rgba(245, 169, 22, 0.9);
  color: #080808;
}

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

.skip-link {
  position: fixed;
  z-index: 200;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  transform: translateY(-150%);
  border-radius: 8px;
  background: var(--text);
  color: var(--ink);
  font-weight: 800;
  transition: transform 180ms ease;
}

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

.reading-progress {
  position: fixed;
  z-index: 160;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--gold), var(--cyan));
}

.site-header {
  position: fixed;
  z-index: 150;
  top: 0;
  right: 0;
  left: 0;
  border-bottom: 1px solid transparent;
  transition: background 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  border-color: var(--line);
  background: rgba(5, 6, 8, 0.88);
  box-shadow: 0 12px 50px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(22px);
}

.nav-wrap {
  display: flex;
  width: min(calc(100% - 40px), var(--max));
  height: var(--header-h);
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  gap: 24px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  filter: drop-shadow(0 0 14px rgba(23, 184, 255, 0.25));
}

.brand b {
  color: var(--blue);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.desktop-nav > a:not(.nav-cta):not(.language-switch) {
  position: relative;
  color: var(--muted-bright);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.desktop-nav > a:not(.nav-cta):not(.language-switch)::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--gold);
  content: "";
  transition: transform 180ms ease;
}

.desktop-nav > a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.language-switch {
  display: inline-flex;
  min-width: 42px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-bright);
  border-radius: 999px;
  color: var(--muted-bright);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.language-switch:hover {
  border-color: rgba(245, 169, 22, 0.5);
  background: rgba(245, 169, 22, 0.08);
  color: var(--gold-soft);
}

.nav-cta {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid rgba(245, 169, 22, 0.48);
  border-radius: 999px;
  background: rgba(245, 169, 22, 0.1);
  color: #ffe0a1;
  font-size: 0.78rem;
  font-weight: 800;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  background: var(--gold);
  color: #090a0b;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text);
  content: "";
  transition: transform 200ms ease, opacity 200ms ease;
}

.menu-toggle span {
  position: relative;
}

.menu-toggle span::before {
  position: absolute;
  top: -6px;
}

.menu-toggle span::after {
  position: absolute;
  top: 6px;
}

.site-header.is-open .menu-toggle span {
  background: transparent;
}

.site-header.is-open .menu-toggle span::before {
  top: 0;
  transform: rotate(45deg);
}

.site-header.is-open .menu-toggle span::after {
  top: 0;
  transform: rotate(-45deg);
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  overflow-x: clip;
  align-items: center;
  padding: calc(var(--header-h) + 64px) 0 72px;
  grid-template-columns: minmax(0, 1fr);
  isolation: isolate;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 10%;
  right: -12%;
  width: 58vw;
  height: 58vw;
  border: 1px solid rgba(23, 184, 255, 0.08);
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(23, 184, 255, 0.11) 0 1px, transparent 2px) 0 0 / 20px 20px,
    radial-gradient(circle at center, rgba(5, 91, 169, 0.14), transparent 62%);
  content: "";
  filter: blur(0.1px);
  mask-image: radial-gradient(circle, #000 20%, transparent 70%);
}

.hero-grid {
  display: grid;
  width: min(calc(100% - 40px), var(--max));
  min-width: 0;
  align-items: center;
  margin: 0 auto;
  grid-template-columns: minmax(0, 1.04fr) minmax(380px, 0.76fr);
  gap: clamp(48px, 8vw, 116px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin: 0 0 24px;
  gap: 12px;
  color: var(--gold-soft);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 34px;
  height: 1px;
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold);
  content: "";
}

.hero h1 {
  max-width: 870px;
  margin: 0;
  font-size: clamp(3.15rem, 6.2vw, 6.25rem);
  font-weight: 800;
  letter-spacing: -0.065em;
  line-height: 0.94;
}

.hero h1 em {
  display: block;
  margin-top: 0.12em;
  background: linear-gradient(95deg, var(--gold-soft), var(--gold) 48%, #d68400 88%);
  background-clip: text;
  color: transparent;
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.hero-lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: var(--muted-bright);
  font-size: clamp(1rem, 1.35vw, 1.18rem);
  line-height: 1.72;
}

.hero-lead strong {
  color: var(--text);
  font-weight: 700;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 34px;
  gap: 14px;
}

.button {
  position: relative;
  display: inline-flex;
  max-width: 100%;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.87rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.25;
  text-align: center;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button::after {
  margin-left: 11px;
  content: "→";
  font-size: 1.05rem;
  transition: transform 180ms ease;
}

.button:hover {
  transform: translateY(-3px);
}

.button:hover::after {
  transform: translateX(4px);
}

.button-primary {
  background: linear-gradient(120deg, #ffd071, var(--gold) 66%, #e18800);
  box-shadow: 0 16px 44px rgba(245, 169, 22, 0.19), inset 0 1px rgba(255, 255, 255, 0.45);
  color: #090a0b;
}

.button-primary:hover {
  box-shadow: 0 20px 55px rgba(245, 169, 22, 0.3), inset 0 1px rgba(255, 255, 255, 0.45);
}

.button-secondary {
  border-color: var(--line-bright);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
}

.button-secondary:hover {
  border-color: rgba(23, 184, 255, 0.42);
  background: rgba(23, 184, 255, 0.07);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  margin: 34px 0 0;
  padding: 0;
  gap: 10px;
  list-style: none;
}

.hero-meta li {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.022);
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hero-meta li::before {
  width: 5px;
  height: 5px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 10px var(--blue);
  content: "";
}

.book-stage {
  position: relative;
  width: min(100%, 480px);
  justify-self: center;
  perspective: 1200px;
}

.book-stage::before,
.book-stage::after {
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  content: "";
}

.book-stage::before {
  inset: 6% -16% 4%;
  border: 1px solid rgba(23, 184, 255, 0.15);
  box-shadow: inset 0 0 80px rgba(23, 184, 255, 0.07), 0 0 70px rgba(0, 89, 186, 0.08);
}

.book-stage::after {
  right: -3%;
  bottom: -6%;
  width: 74%;
  height: 16%;
  background: rgba(0, 0, 0, 0.85);
  filter: blur(28px);
}

.book-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 30px;
  background: #0b0d11;
  box-shadow: var(--shadow), 0 0 0 1px rgba(23, 184, 255, 0.05);
  transform: rotateY(-4deg) rotateX(1deg);
  transition: transform 500ms cubic-bezier(0.2, 0.75, 0.2, 1), box-shadow 500ms ease;
}

.book-frame::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.12), transparent 18%, transparent 76%, rgba(23, 184, 255, 0.08));
  content: "";
  pointer-events: none;
}

.book-stage:hover .book-frame {
  box-shadow: 0 42px 110px rgba(0, 0, 0, 0.62), 0 0 45px rgba(23, 184, 255, 0.1);
  transform: rotateY(0) translateY(-8px);
}

.book-frame img {
  width: 100%;
  aspect-ratio: 1122 / 1402;
  object-fit: cover;
}

.book-frame.cover-en img {
  aspect-ratio: 2 / 3;
}

.book-caption {
  position: absolute;
  right: -34px;
  bottom: 11%;
  z-index: 4;
  width: min(240px, 58%);
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 18px;
  background: rgba(8, 11, 16, 0.84);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(18px);
}

.book-caption span {
  display: block;
  margin-bottom: 6px;
  color: var(--gold-soft);
  font-size: 0.63rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.book-caption p {
  margin: 0;
  color: var(--muted-bright);
  font-size: 0.76rem;
  line-height: 1.55;
}

.scroll-mark {
  position: absolute;
  bottom: 24px;
  left: 50%;
  display: flex;
  align-items: center;
  transform: translateX(-50%);
  gap: 10px;
  color: #747d8a;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.scroll-mark::before {
  width: 1px;
  height: 32px;
  background: linear-gradient(var(--gold), transparent);
  content: "";
  animation: scrollPulse 1.8s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.7); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
}

.section {
  position: relative;
  padding: clamp(92px, 11vw, 150px) 0;
}

.section-shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.section-label {
  display: flex;
  align-items: center;
  margin: 0 0 18px;
  gap: 12px;
  color: var(--blue);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.section-label::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 16px currentColor;
  content: "";
}

.section-heading {
  max-width: 920px;
  margin: 0;
  font-size: clamp(2.35rem, 4.8vw, 4.7rem);
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 1.01;
}

.section-heading em {
  color: var(--gold-soft);
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 400;
}

.section-copy {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted-bright);
  font-size: 1.03rem;
}

.promotion {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 82% 45%, rgba(23, 184, 255, 0.09), transparent 28rem),
    rgba(255, 255, 255, 0.012);
}

.promotion-grid {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: clamp(50px, 9vw, 130px);
}

.promotion-copy {
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.promotion-copy p {
  margin: 0 0 22px;
  color: var(--muted-bright);
  font-size: 1.03rem;
}

.promotion-copy strong {
  color: var(--text);
}

.text-link {
  display: inline-flex;
  align-items: center;
  margin-top: 10px;
  color: var(--gold-soft);
  font-size: 0.83rem;
  font-weight: 800;
}

.text-link::after {
  margin-left: 10px;
  content: "→";
  transition: transform 180ms ease;
}

.text-link:hover::after {
  transform: translateX(4px);
}

.promise-line {
  display: grid;
  margin-top: 64px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.promise-line span {
  display: flex;
  min-height: 110px;
  padding: 24px 30px;
  align-items: center;
  color: var(--muted-bright);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.promise-line span::before {
  width: 7px;
  height: 7px;
  margin-right: 12px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold);
  content: "";
}

.opening {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 10% 50%, rgba(245, 169, 22, 0.07), transparent 30rem),
    rgba(255, 255, 255, 0.012);
}

.opening-grid {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(48px, 9vw, 130px);
}

.opening-quote {
  position: sticky;
  top: 130px;
}

.opening-quote blockquote {
  margin: 0;
  font-family: "DM Serif Display", Georgia, serif;
  font-size: clamp(3.1rem, 6vw, 6.2rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 0.93;
}

.opening-quote blockquote span {
  display: block;
  background: linear-gradient(90deg, var(--gold-soft), var(--gold));
  background-clip: text;
  color: transparent;
}

.opening-quote p {
  max-width: 390px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.opening-copy > p {
  margin: 0 0 22px;
  color: var(--muted-bright);
  font-size: clamp(1.06rem, 1.45vw, 1.25rem);
  line-height: 1.8;
}

.opening-copy > p:first-child::first-letter {
  float: left;
  margin: 0.05em 0.12em 0 0;
  color: var(--gold);
  font-family: "DM Serif Display", Georgia, serif;
  font-size: 4.4em;
  line-height: 0.75;
}

.question-shift {
  display: grid;
  margin-top: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 9, 13, 0.65);
  grid-template-columns: 1fr 1fr;
}

.question-shift div {
  min-height: 150px;
  padding: 26px;
}

.question-shift div + div {
  border-left: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(23, 184, 255, 0.08), transparent);
}

.question-shift span {
  display: block;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.question-shift strong {
  display: block;
  color: var(--text);
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  line-height: 1.35;
}

.manifesto {
  padding: clamp(72px, 8vw, 110px) 0;
  overflow: hidden;
  background: var(--text);
  color: var(--ink);
}

.manifesto::before {
  position: absolute;
  top: -40%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  border: 1px solid rgba(0, 100, 190, 0.13);
  border-radius: 50%;
  content: "";
}

.manifesto p {
  max-width: 1120px;
  margin: 0;
  font-size: clamp(2.25rem, 5.2vw, 5.4rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.manifesto em {
  color: #007bc2;
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 400;
}

.themes {
  background: linear-gradient(180deg, #080b10, var(--ink));
}

.section-intro-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
}

.section-intro-row .section-copy {
  max-width: 430px;
  margin: 0 0 4px;
}

.theme-grid {
  display: grid;
  margin-top: 64px;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.theme-card {
  position: relative;
  min-height: 290px;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.04), transparent 48%),
    var(--panel);
  transition: transform 260ms ease, border-color 260ms ease, background 260ms ease;
}

.theme-card::after {
  position: absolute;
  right: -55px;
  bottom: -70px;
  width: 160px;
  height: 160px;
  border: 1px solid rgba(23, 184, 255, 0.12);
  border-radius: 50%;
  content: "";
  transition: transform 400ms ease, border-color 300ms ease;
}

.theme-card:hover {
  transform: translateY(-8px);
  border-color: rgba(23, 184, 255, 0.35);
  background:
    linear-gradient(145deg, rgba(23, 184, 255, 0.09), transparent 52%),
    var(--panel-strong);
}

.theme-card:hover::after {
  transform: scale(1.18);
  border-color: rgba(245, 169, 22, 0.3);
}

.card-number {
  display: inline-flex;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(245, 169, 22, 0.3);
  border-radius: 50%;
  color: var(--gold-soft);
  font-family: "DM Serif Display", Georgia, serif;
  font-size: 1rem;
}

.theme-card h3 {
  max-width: 280px;
  margin: 45px 0 12px;
  font-size: 1.18rem;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.theme-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.framework {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(100deg, rgba(0, 69, 130, 0.15), transparent 45%),
    #07090d;
}

.framework-grid {
  display: grid;
  align-items: start;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(60px, 8vw, 120px);
}

.framework-copy {
  position: sticky;
  top: 130px;
}

.framework-list {
  display: grid;
  counter-reset: framework;
}

.framework-item {
  position: relative;
  display: grid;
  min-height: 164px;
  align-items: start;
  padding: 30px 18px 30px 80px;
  border-top: 1px solid var(--line);
  counter-increment: framework;
  transition: background 220ms ease;
}

.framework-item:last-child {
  border-bottom: 1px solid var(--line);
}

.framework-item::before {
  position: absolute;
  top: 29px;
  left: 18px;
  color: var(--gold);
  content: "0" counter(framework);
  font-family: "DM Serif Display", Georgia, serif;
  font-size: 1.1rem;
}

.framework-item:hover {
  background: linear-gradient(90deg, rgba(23, 184, 255, 0.07), transparent);
}

.framework-item h3 {
  margin: 0 0 9px;
  font-size: clamp(1.45rem, 2.5vw, 2.1rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.framework-item p {
  max-width: 570px;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.metrics {
  padding-top: 0;
}

.metric-grid {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.018);
  grid-template-columns: repeat(4, 1fr);
}

.metric {
  min-height: 190px;
  padding: 35px;
}

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

.metric strong {
  display: block;
  margin-bottom: 8px;
  background: linear-gradient(110deg, #fff, #9ddaff);
  background-clip: text;
  color: transparent;
  font-family: "DM Serif Display", Georgia, serif;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  font-weight: 400;
  letter-spacing: -0.05em;
  line-height: 1;
}

.metric span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chapters {
  background:
    radial-gradient(circle at 95% 20%, rgba(245, 169, 22, 0.06), transparent 24rem),
    var(--ink);
}

.chapter-layout {
  display: grid;
  margin-top: 64px;
  align-items: start;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(50px, 8vw, 110px);
}

.chapter-note {
  position: sticky;
  top: 130px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    linear-gradient(145deg, rgba(245, 169, 22, 0.08), transparent 55%),
    var(--panel);
}

.chapter-note strong {
  display: block;
  margin-bottom: 14px;
  font-family: "DM Serif Display", Georgia, serif;
  font-size: clamp(1.65rem, 2.8vw, 2.5rem);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.chapter-note p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

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

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

.chapter-list summary {
  position: relative;
  display: grid;
  min-height: 90px;
  align-items: center;
  padding: 18px 54px 18px 62px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  list-style: none;
  transition: color 180ms ease, background 180ms ease;
}

.chapter-list summary::-webkit-details-marker {
  display: none;
}

.chapter-list summary span {
  position: absolute;
  left: 10px;
  color: var(--muted);
  font-family: "DM Serif Display", Georgia, serif;
  font-size: 0.9rem;
  font-weight: 400;
}

.chapter-list summary::after {
  position: absolute;
  right: 12px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line-bright);
  border-radius: 50%;
  color: var(--gold);
  content: "+";
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 25px;
  text-align: center;
  transition: transform 180ms ease, background 180ms ease;
}

.chapter-list details[open] summary {
  background: rgba(23, 184, 255, 0.035);
  color: #fff;
}

.chapter-list details[open] summary::after {
  transform: rotate(45deg);
  border-color: rgba(245, 169, 22, 0.48);
  background: rgba(245, 169, 22, 0.08);
}

.chapter-list details p {
  max-width: 650px;
  margin: -4px 54px 0 62px;
  padding-bottom: 28px;
  color: var(--muted);
  font-size: 0.88rem;
}

.audience {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #080a0e;
}

.audience-grid {
  display: grid;
  margin-top: 60px;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.audience-card {
  min-height: 240px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.audience-icon {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 48px;
  place-items: center;
  border: 1px solid rgba(23, 184, 255, 0.28);
  border-radius: 13px;
  background: rgba(23, 184, 255, 0.07);
  color: var(--cyan);
  font-size: 1rem;
}

.audience-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.audience-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.68;
}

.editorial {
  padding-top: 0;
}

.editorial-grid {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #090c11;
  grid-template-columns: 1fr 1fr;
}

.editorial-image {
  position: relative;
  min-height: 720px;
  overflow: hidden;
}

.editorial-image::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 62%, #090c11 100%);
  content: "";
}

.editorial-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.editorial-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(38px, 6vw, 80px);
}

.editorial-copy blockquote {
  margin: 0;
  font-family: "DM Serif Display", Georgia, serif;
  font-size: clamp(2.1rem, 4vw, 4.15rem);
  letter-spacing: -0.04em;
  line-height: 1.02;
}

.editorial-copy blockquote em {
  color: var(--gold-soft);
}

.editorial-copy p {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.75;
}

.author {
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 119, 206, 0.11), transparent 28rem),
    var(--ink);
}

.author-grid {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(320px, 0.84fr) minmax(0, 1.16fr);
  gap: clamp(50px, 9vw, 130px);
}

.author-image {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.author-image::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 68%, rgba(4, 6, 9, 0.72));
  content: "";
}

.author-image img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.author-copy .section-heading {
  max-width: 670px;
}

.author-copy > p:not(.section-label) {
  max-width: 690px;
  margin: 25px 0 0;
  color: var(--muted-bright);
  font-size: 1rem;
}

.author-signature {
  display: flex;
  align-items: center;
  margin-top: 36px;
  gap: 18px;
}

.author-signature::before {
  width: 44px;
  height: 1px;
  background: var(--gold);
  content: "";
}

.author-signature strong {
  display: block;
  font-size: 0.9rem;
}

.author-signature span {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
}

.research {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #080b10;
}

.research-grid {
  display: grid;
  align-items: center;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(50px, 8vw, 110px);
}

.research-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.research-points span {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--muted-bright);
  font-size: 0.78rem;
  font-weight: 700;
}

.research-points span::before {
  margin-right: 9px;
  color: var(--blue);
  content: "✦";
}

.offer {
  padding-bottom: 80px;
}

.offer-card {
  position: relative;
  display: grid;
  min-height: 580px;
  align-items: center;
  padding: clamp(42px, 7vw, 90px);
  overflow: hidden;
  border: 1px solid rgba(245, 169, 22, 0.22);
  border-radius: clamp(28px, 5vw, 52px);
  background:
    linear-gradient(110deg, rgba(4, 7, 11, 0.98) 20%, rgba(7, 19, 29, 0.91) 62%, rgba(23, 184, 255, 0.09)),
    var(--panel);
  box-shadow: var(--shadow);
  isolation: isolate;
}

.offer-card::before {
  position: absolute;
  z-index: -1;
  top: -40%;
  right: -10%;
  width: 62%;
  aspect-ratio: 1;
  border: 1px solid rgba(23, 184, 255, 0.14);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 184, 255, 0.12), transparent 64%);
  content: "";
}

.offer-content {
  max-width: 760px;
}

.offer-content h2 {
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.065em;
  line-height: 0.95;
}

.offer-content h2 em {
  display: block;
  color: var(--gold-soft);
  font-family: "DM Serif Display", Georgia, serif;
  font-weight: 400;
}

.offer-content > p {
  max-width: 610px;
  margin: 26px 0 0;
  color: var(--muted-bright);
  font-size: 1.02rem;
}

.offer-list {
  display: flex;
  flex-wrap: wrap;
  margin: 32px 0 0;
  padding: 0;
  gap: 10px;
  list-style: none;
}

.offer-list li {
  display: inline-flex;
  align-items: center;
  color: var(--muted-bright);
  font-size: 0.78rem;
  font-weight: 700;
}

.offer-list li::before {
  display: inline-grid;
  width: 22px;
  height: 22px;
  margin-right: 8px;
  place-items: center;
  border-radius: 50%;
  background: rgba(23, 184, 255, 0.1);
  color: var(--cyan);
  content: "✓";
  font-size: 0.68rem;
}

.offer-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 36px;
  gap: 18px;
}

.offer-help {
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.5;
}

.offer-help strong {
  display: block;
  color: var(--muted-bright);
}

.faq {
  padding-top: 80px;
}

.faq-layout {
  display: grid;
  align-items: start;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(50px, 9vw, 130px);
}

.faq-title {
  position: sticky;
  top: 130px;
}

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

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 25px 52px 25px 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 23px;
  right: 4px;
  color: var(--gold);
  content: "+";
  font-size: 1.4rem;
  font-weight: 400;
  transition: transform 180ms ease;
}

.faq-list details[open] summary::after {
  transform: rotate(45deg);
}

.faq-list details p {
  max-width: 690px;
  margin: -4px 52px 0 0;
  padding-bottom: 26px;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  margin-top: 90px;
  border-top: 1px solid var(--line);
}

.footer-main {
  display: flex;
  width: min(calc(100% - 40px), var(--max));
  min-height: 170px;
  align-items: center;
  justify-content: space-between;
  margin: 0 auto;
  gap: 40px;
}

.footer-copy p {
  max-width: 500px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.74rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.footer-links a {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  transition: color 180ms ease;
}

.footer-links a:hover {
  color: var(--text);
}

.mobile-cta {
  position: fixed;
  z-index: 140;
  right: max(14px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  left: max(14px, env(safe-area-inset-left));
  display: none;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: linear-gradient(120deg, #ffd071, var(--gold));
  box-shadow: 0 14px 45px rgba(0, 0, 0, 0.46);
  color: #08090a;
  font-size: 0.82rem;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: translateY(18px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.mobile-cta[data-visible] {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

.js .reveal-delay-1 { transition-delay: 100ms; }
.js .reveal-delay-2 { transition-delay: 180ms; }
.js .reveal-delay-3 { transition-delay: 260ms; }

@media (max-width: 1080px) {
  .desktop-nav {
    gap: 17px;
  }

  .desktop-nav > a:not(.nav-cta):not(.language-switch) {
    font-size: 0.76rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.68fr);
    gap: 50px;
  }

  .hero h1 {
    font-size: clamp(3.1rem, 6.4vw, 5.4rem);
  }

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

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

  .metric {
    padding: 28px;
  }
}

@media (max-width: 880px) {
  :root {
    --header-h: 68px;
  }

  .desktop-nav {
    position: fixed;
    z-index: 149;
    top: var(--header-h);
    right: 0;
    left: 0;
    display: flex;
    height: calc(100svh - var(--header-h));
    padding: 38px 24px 120px;
    visibility: hidden;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    transform: translateY(-16px);
    background: rgba(5, 6, 8, 0.98);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms;
  }

  .site-header.is-open .desktop-nav {
    visibility: visible;
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .desktop-nav > a:not(.nav-cta):not(.language-switch) {
    padding: 9px 0;
    font-size: 1.25rem;
  }

  .language-switch {
    position: absolute;
    right: 24px;
    bottom: 42px;
  }

  .nav-cta {
    min-height: 54px;
    margin-top: 18px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero {
    padding-top: calc(var(--header-h) + 58px);
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 70px;
  }

  .hero-copy {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .book-stage {
    width: min(76vw, 470px);
  }

  .promotion-grid,
  .opening-grid,
  .framework-grid,
  .chapter-layout,
  .faq-layout,
  .research-grid {
    grid-template-columns: 1fr;
  }

  .opening-quote,
  .framework-copy,
  .chapter-note,
  .faq-title {
    position: static;
  }

  .opening-quote blockquote {
    max-width: 650px;
  }

  .section-intro-row {
    display: block;
  }

  .section-intro-row .section-copy {
    max-width: 680px;
    margin-top: 24px;
  }

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

  .metric + .metric {
    border-left: 0;
  }

  .metric:nth-child(even) {
    border-left: 1px solid var(--line);
  }

  .metric:nth-child(n+3) {
    border-top: 1px solid var(--line);
  }

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

  .editorial-image {
    min-height: 560px;
  }

  .editorial-image::after {
    background: linear-gradient(180deg, transparent 68%, #090c11 100%);
  }

  .author-grid {
    grid-template-columns: 0.88fr 1.12fr;
    gap: 45px;
  }

}

@media (max-width: 680px) {
  body {
    padding-bottom: 76px;
  }

  .nav-wrap,
  .hero-grid,
  .section-shell,
  .footer-main {
    width: min(calc(100% - 28px), var(--max));
  }

  .brand span {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-h) + 52px);
    padding-bottom: 105px;
  }

  .hero::before {
    top: 37%;
    right: -60%;
    width: 130vw;
    height: 130vw;
  }

  .eyebrow {
    margin-bottom: 18px;
    font-size: 0.63rem;
    letter-spacing: 0.14em;
  }

  .hero h1 {
    font-size: clamp(2.85rem, 13.2vw, 4.6rem);
    letter-spacing: -0.06em;
  }

  .hero-lead {
    margin-top: 22px;
    font-size: 0.98rem;
  }

  .cta-row .button {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding-right: 18px;
    padding-left: 18px;
    text-align: center;
  }

  .hero-meta {
    margin-top: 24px;
  }

  .hero-meta li {
    font-size: 0.61rem;
  }

  .book-stage {
    width: min(86vw, 440px);
  }

  .book-caption {
    right: 0;
    bottom: -42px;
    width: 72%;
  }

  .scroll-mark {
    display: none;
  }

  .section {
    padding: 86px 0;
  }

  .section-heading {
    font-size: clamp(2.25rem, 11vw, 3.5rem);
  }

  .section-copy {
    font-size: 0.96rem;
  }

  .promotion-grid {
    gap: 42px;
  }

  .promotion-copy {
    padding-top: 24px;
  }

  .promise-line {
    margin-top: 46px;
    grid-template-columns: 1fr;
  }

  .promise-line span {
    min-height: 82px;
  }

  .promise-line span + span {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .opening-grid {
    gap: 50px;
  }

  .opening-quote blockquote {
    font-size: clamp(3rem, 15vw, 5rem);
  }

  .opening-copy > p {
    font-size: 1rem;
  }

  .question-shift {
    grid-template-columns: 1fr;
  }

  .question-shift div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .manifesto p {
    font-size: clamp(2.25rem, 11vw, 3.5rem);
  }

  .theme-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .theme-card {
    min-height: 260px;
  }

  .framework-grid,
  .chapter-layout,
  .faq-layout,
  .research-grid {
    gap: 46px;
  }

  .framework-item {
    padding-right: 8px;
    padding-left: 62px;
  }

  .framework-item::before {
    left: 7px;
  }

  .metric-grid {
    border-radius: var(--radius-md);
  }

  .metric {
    min-height: 150px;
    padding: 24px 20px;
  }

  .metric strong {
    font-size: 2.7rem;
  }

  .metric span {
    font-size: 0.62rem;
  }

  .chapter-list summary {
    min-height: 82px;
    padding-right: 42px;
    padding-left: 45px;
    font-size: 0.9rem;
  }

  .chapter-list summary span {
    left: 4px;
  }

  .chapter-list summary::after {
    right: 2px;
  }

  .chapter-list details p {
    margin-right: 42px;
    margin-left: 45px;
  }

  .audience-card {
    min-height: 220px;
  }

  .editorial {
    padding-top: 0;
  }

  .editorial-grid {
    border-radius: var(--radius-md);
  }

  .editorial-image {
    min-height: 470px;
  }

  .editorial-copy {
    padding: 36px 26px 44px;
  }

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

  .author-image {
    max-width: 520px;
    border-radius: var(--radius-md);
  }

  .offer {
    padding-bottom: 55px;
  }

  .offer-card {
    min-height: 0;
    padding: 48px 24px;
    border-radius: var(--radius-md);
  }

  .offer-content h2 {
    font-size: clamp(2.7rem, 13vw, 4.5rem);
  }

  .offer-actions .button {
    width: 100%;
    max-width: 100%;
    min-width: 0;
    padding-right: 18px;
    padding-left: 18px;
    text-align: center;
  }

  .offer-help {
    width: 100%;
  }

  .footer-main {
    padding: 45px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .mobile-cta {
    display: flex;
  }
}

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

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

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}