:root {
  --paper: #f4efe6;
  --paper-2: #ebe4d6;
  --sheet: #fbf7f0;
  --ink: #1a1714;
  --ink-soft: #3a342c;
  --muted: #6d6458;
  --seal: #9c2f24;
  --seal-deep: #7a221b;
  --bronze: #8d6b3a;
  --line: rgba(26, 23, 20, 0.12);
  --line-strong: rgba(26, 23, 20, 0.22);
  --night: #141311;
  --night-2: #1e1b17;
  --cream: #f6f1e8;
  --cream-dim: rgba(246, 241, 232, 0.72);
  --header: 72px;
  --max: 1080px;
  --serif: "Shippori Mincho", "Yu Mincho", "Hiragino Mincho ProN", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --display: "Cormorant Garamond", "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink-soft);
  background:
    radial-gradient(ellipse at 100% 0%, rgba(156, 47, 36, 0.05), transparent 36%),
    linear-gradient(180deg, #f7f3ea 0%, #f3eee4 40%, #efe6d6 100%);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16.5px;
  line-height: 1.95;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: rgba(156, 47, 36, 0.18); color: var(--ink); }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; }
section[id] { scroll-margin-top: calc(var(--header) + 12px); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}
.skip {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 50;
  transform: translateY(calc(-100% - 24px));
  background: var(--seal);
  color: var(--cream);
  padding: 8px 14px;
}
.skip:focus { transform: none; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 40;
  pointer-events: none;
}
.progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--seal);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: var(--header);
  background: rgba(20, 19, 17, 0.96);
  border-bottom: 1px solid rgba(246, 241, 232, 0.08);
}
.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  height: 100%;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--cream);
}
.seal {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--seal);
  color: #f3d2cc;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1;
}
.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand__text small {
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--cream-dim);
}
.brand__text strong {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.12em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.site-nav a {
  padding: 8px 9px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(246, 241, 232, 0.72);
}
.site-nav a:hover,
.site-nav a.is-active { color: #f0c9c4; }
.nav-toggle { display: none; padding: 10px; }
.nav-toggle__lines,
.nav-toggle__lines::before,
.nav-toggle__lines::after {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--cream);
  position: relative;
}
.nav-toggle__lines::before,
.nav-toggle__lines::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle__lines::before { top: -6px; }
.nav-toggle__lines::after { top: 6px; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.hero {
  background:
    radial-gradient(ellipse at 85% 20%, rgba(156, 47, 36, 0.22), transparent 42%),
    linear-gradient(165deg, #1c1916 0%, #100f0d 70%);
  color: var(--cream);
  border-bottom: 1px solid rgba(246, 241, 232, 0.08);
}
.hero__frame {
  max-width: 1240px;
  margin: 0 auto;
  padding: 72px 28px 0;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px 36px;
}
.hero__phase {
  margin: 8px 0 0;
  writing-mode: vertical-rl;
  letter-spacing: 0.42em;
  font-family: var(--display);
  font-size: 18px;
  color: rgba(246, 241, 232, 0.55);
}
.hero__phase span {
  font-style: italic;
  letter-spacing: 0.18em;
}
.eyebrow {
  margin: 0 0 18px;
  letter-spacing: 0.32em;
  font-size: 12px;
  color: #e7b2ab;
}
h1, h2, h3 { font-weight: 600; letter-spacing: 0.04em; }
.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(48px, 6.4vw, 92px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.hero__gap { display: inline; }
.hero__tagline {
  margin: 20px 0 0;
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: 0.14em;
  color: rgba(246, 241, 232, 0.62);
}
.hero__en {
  margin: 6px 0 0;
  font-family: var(--display);
  font-style: italic;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: rgba(246, 241, 232, 0.45);
}
.hero__lead,
.hero__note {
  max-width: 620px;
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  font-weight: 300;
  color: rgba(246, 241, 232, 0.55);
}
.hero__note { margin-top: 8px; color: rgba(246, 241, 232, 0.42); }
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.btn {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 20px;
  letter-spacing: 0.12em;
  font-size: 14px;
  border: 1px solid transparent;
}
.btn--seal {
  background: var(--seal);
  color: var(--cream);
}
.btn--seal:hover { background: var(--seal-deep); }
.btn--line {
  border-color: rgba(246, 241, 232, 0.35);
  color: var(--cream);
}
.btn--line:hover { border-color: var(--cream); }
.pillars {
  grid-column: 1 / -1;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 56px 0 0;
  padding: 0;
  border-top: 1px solid rgba(246, 241, 232, 0.12);
}
.pillars li {
  padding: 18px 8px 22px 0;
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: rgba(246, 241, 232, 0.72);
}
.pillars span {
  display: block;
  margin-bottom: 6px;
  font-family: var(--display);
  font-style: italic;
  letter-spacing: 0.08em;
  color: #e7b2ab;
  font-size: 14px;
}

.band { padding: 88px 0; }
.band--inset { background: rgba(255, 255, 255, 0.35); }
.band--night {
  background:
    radial-gradient(ellipse at 0% 100%, rgba(156, 47, 36, 0.16), transparent 46%),
    var(--night);
  color: var(--cream-dim);
}
.chapter {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 8px 36px;
}
.chapter__index {
  margin: 6px 0 0;
  writing-mode: vertical-rl;
  letter-spacing: 0.42em;
  font-size: 13px;
  color: var(--bronze);
}
.chapter__index--light { color: #e7b2ab; }
.kicker {
  margin: 0 0 10px;
  font-family: var(--display);
  font-style: italic;
  font-size: 20px;
  color: var(--bronze);
}
.kicker--light { color: #e7b2ab; }
h2 {
  margin: 0 0 28px;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.35;
  color: var(--ink);
}
.band--night h2,
.band--founder h2,
.close h2 { color: var(--cream); }
.lede {
  margin: -8px 0 22px;
  font-size: 18px;
  color: var(--ink);
}
.lede--light { color: var(--cream); }
.prose p { margin: 0 0 16px; text-wrap: pretty; }
.prose--light p { color: rgba(246, 241, 232, 0.82); }

.split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: start;
}
blockquote {
  margin: 0;
  padding: 28px 26px;
  background: var(--night);
  color: var(--cream);
}
blockquote p {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.7;
  letter-spacing: 0.04em;
}
blockquote footer {
  margin-top: 18px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(246, 241, 232, 0.66);
}

.toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 48px;
  border-top: 1px solid var(--line-strong);
}
.toc a {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.toc a span {
  font-family: var(--display);
  font-style: italic;
  font-size: 18px;
  color: var(--seal);
}
.toc a:hover { color: var(--seal); }

.lenses {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 8px 0 28px;
  padding: 0;
}
.lenses li {
  padding: 18px 14px 16px;
  background: var(--sheet);
  border-top: 2px solid var(--seal);
}
.lenses span {
  display: block;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.lenses small {
  font-family: var(--display);
  font-style: italic;
  color: var(--muted);
  font-size: 15px;
}

.steps {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}
.steps li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.steps span,
.domains span,
.outlook span {
  font-family: var(--display);
  font-style: italic;
  font-size: 28px;
  color: var(--seal);
  line-height: 1.2;
}
.steps h3,
.domains h3,
.quad h3,
.outlook h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
}
.steps p,
.domains p,
.quad p,
.outlook p { margin: 0 0 8px; }
.steps p:last-child,
.domains p:last-child,
.quad p:last-child { margin-bottom: 0; }

.domains {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.domains li {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 26px 0;
  border-top: 1px solid rgba(246, 241, 232, 0.14);
}
.domains h3 { color: var(--cream); }
.domains p { color: rgba(246, 241, 232, 0.74); }
.domains span { color: #e7b2ab; }

.quad {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 12px 0 0;
  padding: 0;
}
.quad li {
  padding: 24px 22px 22px;
  background: var(--sheet);
  border: 1px solid var(--line);
}

.hazards {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 6px 0 26px;
  padding: 0;
}
.hazards li {
  padding: 16px 12px;
  text-align: center;
  letter-spacing: 0.06em;
  font-family: var(--serif);
  color: var(--ink);
  background: rgba(156, 47, 36, 0.08);
  border: 1px solid rgba(156, 47, 36, 0.18);
}

.band--founder {
  background: var(--night-2);
  color: var(--cream-dim);
}
.founder {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.founder h2 {
  margin: 0;
  font-size: clamp(48px, 6vw, 76px);
  letter-spacing: 0.14em;
}
.founder__en {
  margin: 8px 0 0;
  font-family: var(--display);
  font-style: italic;
  font-size: 28px;
  color: #e7b2ab;
}
.founder__role {
  margin: 18px 0 0;
  letter-spacing: 0.08em;
  color: rgba(246, 241, 232, 0.7);
}
.founder__line {
  margin: 8px 0 18px;
  font-family: var(--serif);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.5;
  color: var(--cream);
}

.questions {
  list-style: none;
  margin: 8px 0 26px;
  padding: 0;
  counter-reset: q;
}
.questions li {
  counter-increment: q;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.questions li::before {
  content: counter(q, decimal-leading-zero);
  font-family: var(--display);
  font-style: italic;
  color: var(--seal);
  font-size: 20px;
}

.outlook {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 28px;
  margin: 8px 0 0;
  padding: 0;
}
.outlook h3 { font-size: 20px; }
.outlook span { display: block; margin-bottom: 8px; }

.close {
  background: var(--night);
  color: rgba(246, 241, 232, 0.8);
  padding: 96px 0 88px;
}
.close__inner { max-width: 820px; }
.close h2 { margin-bottom: 24px; }
.close p { margin: 0 0 16px; }
.close__sign {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid rgba(246, 241, 232, 0.16);
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.12em;
  line-height: 1.8;
  color: var(--cream);
}
.close__sign span {
  display: inline-block;
  margin-left: 12px;
  font-family: var(--display);
  font-style: italic;
  letter-spacing: 0.04em;
  color: #e7b2ab;
}

.site-footer {
  background: #0e0d0c;
  color: rgba(246, 241, 232, 0.62);
  font-size: 14px;
  line-height: 1.8;
}
.footer__grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 28px;
  padding-top: 36px;
  padding-bottom: 28px;
}
.footer__name {
  margin: 0;
  font-family: var(--serif);
  letter-spacing: 0.14em;
  color: var(--cream);
  font-size: 18px;
}
.footer__motto { margin: 8px 0 0; }
.disclaimer { margin: 0; }
.footer__base {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 22px;
  border-top: 1px solid rgba(246, 241, 232, 0.1);
}
.footer__base a { letter-spacing: 0.08em; }
.footer__base a:hover { color: var(--cream); }

@media (max-width: 1080px) {
  .nav-toggle { display: block; margin-left: auto; }
  .site-nav {
    position: fixed;
    inset: var(--header) 0 0 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 28px 28px;
    background: #141311;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  .site-nav.is-open {
    z-index: 25;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    overflow: auto;
  }
  .site-nav a {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid rgba(246, 241, 232, 0.1);
    font-family: var(--serif);
    font-size: 22px;
    letter-spacing: 0.12em;
  }
}

@media (max-width: 800px) {
  .hero__frame,
  .chapter,
  .split,
  .founder,
  .footer__grid {
    grid-template-columns: 1fr;
  }
  .hero__phase,
  .chapter__index { display: none; }
  .pillars,
  .lenses,
  .hazards,
  .quad,
  .outlook,
  .toc { grid-template-columns: 1fr 1fr; }
  .band { padding: 64px 0; }
  .hero__frame { padding-top: 48px; }
  .hero h1 { font-size: clamp(40px, 11vw, 64px); }
  .hero__gap { display: block; height: 0.06em; }
  .steps li,
  .domains li { grid-template-columns: 52px 1fr; }
}

@media (max-width: 560px) {
  .pillars,
  .lenses,
  .hazards,
  .quad,
  .outlook,
  .toc { grid-template-columns: 1fr; }
  .footer__base { flex-direction: column; }
  .hero h1 { font-size: 40px; }
  .questions li { font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .site-nav { transition: none; }
}