:root {
  color-scheme: dark;
  --ink: #eaf4f3;
  --muted: #94a7aa;
  --night: #071018;
  --night-soft: #0b1720;
  --line: rgba(191, 224, 220, .17);
  --aqua: #8de6d4;
  --aqua-soft: rgba(141, 230, 212, .12);
  --gold: #d8ba78;
  --violet: #9c96df;
  --max: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 82% 8%, rgba(93, 123, 171, .14), transparent 34rem),
    radial-gradient(circle at 18% 42%, rgba(68, 141, 130, .09), transparent 30rem),
    var(--night);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.8;
}
a { color: inherit; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 50; background: var(--aqua); color: var(--night); padding: .6rem 1rem; }
.skip-link:focus { top: 1rem; }
.site-header {
  width: min(calc(100% - 48px), var(--max));
  min-height: 98px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 14px; text-decoration: none; letter-spacing: .08em; }
.brand > span:last-child { display: grid; line-height: 1.15; }
.brand strong { font-family: Georgia, serif; font-size: 1.12rem; letter-spacing: .16em; font-weight: 500; }
.brand small { margin-top: 6px; color: var(--muted); font-size: .58rem; letter-spacing: .2em; }
.brand-mark { position: relative; width: 32px; height: 32px; display: block; }
.brand-mark::before { content: ""; position: absolute; inset: 5px; border: 1px solid var(--aqua); border-radius: 50%; box-shadow: 0 0 18px rgba(141,230,212,.2); }
.brand-mark i { position: absolute; left: 1px; top: 15px; width: 30px; height: 1px; background: var(--line); transform-origin: center; }
.brand-mark i:nth-child(2) { transform: rotate(60deg); }
.brand-mark i:nth-child(3) { transform: rotate(-60deg); }
.site-header nav, footer nav { display: flex; align-items: center; gap: 30px; }
.site-header nav a, .back-link { color: var(--muted); text-decoration: none; font-size: .7rem; letter-spacing: .16em; transition: color .2s ease; }
.site-header nav a:hover, .site-header nav a:focus, .back-link:hover { color: var(--ink); }
.site-header .nav-hq { padding: 10px 14px; border: 1px solid var(--line); color: var(--aqua); }
.hero { position: relative; width: min(calc(100% - 48px), var(--max)); min-height: 730px; margin: 0 auto; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-copy { position: relative; z-index: 2; padding: 88px 0 120px; }
.eyebrow, .section-number, .feature-kicker { color: var(--aqua); font-size: .68rem; font-weight: 700; letter-spacing: .24em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { margin: 28px 0; font-family: Georgia, "Yu Mincho", serif; font-size: clamp(3.1rem, 7vw, 6.6rem); font-weight: 400; line-height: 1.13; letter-spacing: -.045em; }
.hero h1 em { color: var(--aqua); font-style: normal; text-shadow: 0 0 40px rgba(141,230,212,.12); }
.lead { max-width: 590px; color: #b8c8c9; font-size: clamp(1rem, 1.6vw, 1.18rem); }
.hero-actions { display: flex; gap: 12px; margin-top: 38px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 50px; padding: 0 24px; border: 1px solid var(--line); text-decoration: none; font-size: .76rem; font-weight: 700; letter-spacing: .08em; transition: transform .2s ease, background .2s ease; }
.button:hover, .button:focus { transform: translateY(-2px); }
.button.primary { background: var(--aqua); border-color: var(--aqua); color: #06100f; }
.button.secondary { background: rgba(255,255,255,.02); color: var(--ink); }
.hero-orbit { position: relative; width: min(42vw, 520px); aspect-ratio: 1; justify-self: end; }
.orbit, .core { position: absolute; inset: 50%; border-radius: 50%; transform: translate(-50%,-50%); }
.orbit { border: 1px solid rgba(141,230,212,.21); }
.orbit-one { width: 88%; height: 88%; }
.orbit-two { width: 66%; height: 66%; border-color: rgba(216,186,120,.25); transform: translate(-50%,-50%) rotate(18deg) scaleY(.72); }
.orbit-three { width: 106%; height: 54%; border-color: rgba(156,150,223,.22); transform: translate(-50%,-50%) rotate(-21deg); }
.core { display: grid; place-items: center; width: 42%; height: 42%; background: radial-gradient(circle at 34% 26%, rgba(255,255,255,.55), rgba(141,230,212,.25) 18%, rgba(54,96,112,.46) 45%, rgba(10,20,28,.88) 72%); border: 1px solid rgba(232,255,250,.42); box-shadow: inset 0 0 50px rgba(174,234,222,.18), 0 0 90px rgba(80,166,151,.14); }
.core span { font-family: Georgia, serif; font-size: 2rem; letter-spacing: .12em; color: rgba(238,255,252,.86); }
.note { position: absolute; color: var(--gold); font-size: 1.3rem; text-shadow: 0 0 16px currentColor; }
.note-a { top: 10%; left: 40%; }.note-b { right: 5%; top: 48%; color: var(--aqua); }.note-c { bottom: 9%; left: 17%; color: var(--violet); }
.hero-foot { position: absolute; inset: auto 0 28px; display: flex; justify-content: space-between; color: #607478; font-size: .6rem; letter-spacing: .2em; }
.statement, .system, .principles, .closing { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 130px 0; border-bottom: 1px solid var(--line); }
.statement { display: grid; grid-template-columns: .32fr 1fr; gap: 80px; }
.statement h2, .section-heading h2, .closing h2 { font-family: Georgia, "Yu Mincho", serif; font-weight: 400; font-size: clamp(2.2rem, 4.4vw, 4.6rem); line-height: 1.25; letter-spacing: -.03em; }
.statement > div > p { max-width: 750px; color: #adbec0; font-size: 1.06rem; }
.section-heading { display: grid; grid-template-columns: .32fr 1fr; gap: 80px; align-items: start; margin-bottom: 70px; }
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.feature-grid article { min-height: 350px; padding: 34px; background: linear-gradient(150deg, rgba(15,31,40,.98), rgba(7,16,24,.98)); }
.feature-index { color: #4e6267; font-family: Georgia, serif; font-size: 1.8rem; }
.feature-kicker { margin-top: 72px; }
.feature-grid h3 { font-family: Georgia, "Yu Mincho", serif; font-size: 1.5rem; font-weight: 400; }
.feature-grid article p:last-child { color: var(--muted); }
.operating-loop { display: grid; grid-template-columns: repeat(5,1fr); list-style: none; padding: 0; margin: 72px 0 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.operating-loop li { position: relative; display: grid; gap: 5px; padding: 28px 18px; border-right: 1px solid var(--line); }
.operating-loop li:last-child { border-right: 0; }
.operating-loop span { color: var(--gold); font-size: .65rem; }
.operating-loop strong { font: 400 1rem Georgia, serif; letter-spacing: .08em; }
.operating-loop small { color: var(--muted); }
.principle-list { margin-left: calc(32% + 80px); border-top: 1px solid var(--line); }
.principle-list article { display: grid; grid-template-columns: 80px 1fr; gap: 30px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.principle-list article > strong { color: var(--gold); font: 400 1.1rem Georgia, serif; }
.principle-list h3 { margin-bottom: 8px; font: 400 1.4rem Georgia, "Yu Mincho", serif; }
.principle-list p { margin-bottom: 0; color: var(--muted); }
.closing { text-align: center; }
.closing h2 { margin: 24px auto; }
.closing > p:not(.eyebrow) { color: var(--muted); }
.closing .button { margin-top: 24px; }
footer { width: min(calc(100% - 48px), var(--max)); min-height: 160px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; }
.footer-brand { display: grid; gap: 4px; }
.footer-brand strong { font: 400 1.1rem Georgia, serif; letter-spacing: .15em; }
.footer-brand span, footer small, footer nav a { color: #718589; font-size: .66rem; text-decoration: none; }
footer small { grid-column: 1 / -1; padding-bottom: 30px; }

.site-header.compact { min-height: 86px; }
.document-shell { width: min(calc(100% - 48px), 880px); margin: 0 auto; padding: 100px 0 140px; }
.document-shell > h1 { margin: 16px 0 12px; font: 400 clamp(2.6rem,6vw,5.2rem)/1.2 Georgia, "Yu Mincho", serif; }
.document-meta { color: var(--muted); font-size: .8rem; }
.document-body { margin-top: 70px; }
.document-body > p { color: #c4d0d1; font-size: 1.05rem; }
.document-body section { padding: 32px 0; border-top: 1px solid var(--line); }
.document-body h2 { font: 400 1.35rem Georgia, "Yu Mincho", serif; }
.document-body p, .document-body li { color: #a8b9bb; }
.document-body a { color: var(--aqua); text-underline-offset: 4px; }
.document-footer { min-height: 120px; display: flex; }
.document-footer > a { font: 400 1rem Georgia, serif; letter-spacing: .16em; text-decoration: none; }
.contact-lead { max-width: 700px; color: #b2c2c4; font-size: 1.08rem; }
.contact-grid { display: grid; gap: 1px; margin-top: 60px; background: var(--line); border: 1px solid var(--line); }
.contact-grid a { display: grid; padding: 30px; background: var(--night-soft); text-decoration: none; }
.contact-grid span { color: var(--aqua); font-size: .62rem; letter-spacing: .18em; }
.contact-grid strong { margin: 8px 0; font: 400 1.3rem Georgia, "Yu Mincho", serif; }
.contact-grid em { color: var(--muted); font-style: normal; }
.contact-note { margin-top: 50px; padding: 28px; border: 1px solid var(--line); }
.contact-note h2 { font-size: 1rem; }.contact-note p { margin-bottom: 0; color: var(--muted); }
.not-found { width: min(calc(100% - 48px), 760px); min-height: 100vh; margin: 0 auto; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.not-found h1 { font: 400 clamp(2.4rem,6vw,5rem)/1.2 Georgia, "Yu Mincho", serif; }
.not-found > p:not(.eyebrow) { color: var(--muted); }

@media (max-width: 860px) {
  .site-header { width: min(calc(100% - 32px), var(--max)); min-height: 82px; }
  .site-header nav a:not(.nav-hq) { display: none; }
  .hero { width: min(calc(100% - 32px), var(--max)); min-height: auto; grid-template-columns: 1fr; }
  .hero-copy { padding: 86px 0 24px; }
  .hero h1 { font-size: clamp(3rem,14vw,5rem); }
  .hero-orbit { width: min(90vw,440px); justify-self: center; margin: 10px 0 100px; }
  .hero-foot { bottom: 22px; }
  .statement, .system, .principles, .closing { width: min(calc(100% - 32px), var(--max)); padding: 88px 0; }
  .statement, .section-heading { grid-template-columns: 1fr; gap: 22px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid article { min-height: 290px; }
  .feature-kicker { margin-top: 48px; }
  .operating-loop { grid-template-columns: 1fr; }
  .operating-loop li { border-right: 0; border-bottom: 1px solid var(--line); }
  .principle-list { margin-left: 0; }
  footer { width: min(calc(100% - 32px), var(--max)); grid-template-columns: 1fr; padding: 42px 0 20px; }
  footer nav { align-items: flex-start; flex-wrap: wrap; gap: 14px 22px; }
  .document-shell { width: min(calc(100% - 32px), 880px); padding: 70px 0 100px; }
  .document-footer { display: grid; }
}

@media (max-width: 520px) {
  .brand small { display: none; }
  .site-header .nav-hq { padding: 8px 10px; font-size: .61rem; }
  .hero-actions { flex-direction: column; }
  .hero-foot { display: none; }
  .hero-orbit { margin-bottom: 64px; }
  .statement h2, .section-heading h2, .closing h2 { font-size: 2.35rem; }
  .principle-list article { grid-template-columns: 42px 1fr; gap: 16px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }