:root {
  --bg: #09080d;
  --bg-soft: #111019;
  --surface: rgba(26, 22, 33, 0.78);
  --surface-strong: #17131d;
  --text: #f4efe6;
  --muted: #b7afbd;
  --gold: #e6d29b;
  --gold-deep: #9e7d3e;
  --violet: #6b4c82;
  --wine: #5c243a;
  --line: rgba(230, 210, 155, 0.22);
  --shadow: 0 20px 70px rgba(0,0,0,0.4);
  --radius: 24px;
  --shell: min(1240px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(107,76,130,.14), transparent 34%),
    radial-gradient(circle at 80% 0%, rgba(92,36,58,.14), transparent 30%),
    var(--bg);
  line-height: 1.75;
  letter-spacing: .02em;
  line-break: strict;
  word-break: auto-phrase;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
img { max-width: 100%; display: block; }
p { text-wrap: pretty; }

.sr-only,
.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.skip-link:focus {
  width: auto;
  height: auto;
  margin: 0;
  clip: auto;
  z-index: 1000;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--text);
  color: var(--bg);
}

.shell { width: var(--shell); margin: 0 auto; }
.section { padding: 120px 0; position: relative; }
.two-column { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.section-heading { max-width: 920px; margin-bottom: 48px; }
.section-heading h2,
.performance-copy h2,
.section-about h2,
.section-guide h2,
.final-cta h2 {
  margin: 0 0 20px;
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: .02em;
  text-wrap: balance;
}
.section-heading h2 { font-size: clamp(2rem, 3.35vw, 3.55rem); }
.section-about h2 { font-size: clamp(2rem, 2.8vw, 3rem); }
.section-guide h2 { font-size: clamp(2rem, 3vw, 3.25rem); }
.final-cta h2 { font-size: clamp(2rem, 3.4vw, 3.7rem); }
.performance-copy h2 { font-size: clamp(2rem, 3.2vw, 3.4rem); }

.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: .78rem;
  letter-spacing: .22em;
  text-transform: uppercase;
}
.section-lead { color: var(--muted); font-size: 1.05rem; }
.note { color: var(--muted); font-size: .85rem; margin-top: 24px; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(9,8,13,.76);
  backdrop-filter: blur(18px);
  border-color: rgba(255,255,255,.06);
}
.header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand-mark {
  font-family: "Times New Roman", "Yu Mincho", serif;
  font-weight: 600;
  font-style: italic;
  font-size: 1.34rem;
  letter-spacing: .025em;
  white-space: nowrap;
}
.desktop-nav { display: flex; gap: 28px; margin-left: auto; }
.desktop-nav a,
.mobile-menu a {
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .14em;
}
.desktop-nav a:hover,
.mobile-menu a:hover { color: var(--gold); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.mini-cta {
  display: none;
  border: 1px solid var(--line);
  padding: 9px 13px;
  font-size: .72rem;
  letter-spacing: .14em;
}
.menu-button { display: none; width: 44px; height: 44px; border: 0; background: transparent; padding: 9px; }
.menu-button span:not(.sr-only) { display: block; height: 1px; background: var(--text); margin: 7px 0; }
.mobile-menu { background: rgba(9,8,13,.98); padding: 18px 24px 30px; border-top: 1px solid rgba(255,255,255,.06); }
.mobile-menu a { display: block; padding: 12px 0; }

.hero {
  min-height: 100svh;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(9,8,13,.98) 8%, rgba(9,8,13,.72) 50%, rgba(9,8,13,.5) 100%),
    radial-gradient(circle at 70% 35%, rgba(111,77,137,.22), transparent 30%),
    linear-gradient(180deg, #0b0910 0%, #130f18 56%, #09080d 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  background: linear-gradient(transparent, var(--bg));
}
.hero-content { position: relative; z-index: 3; padding-top: 76px; max-width: 860px; }
.hero h1 {
  margin: 0;
  font-family: "Times New Roman", "Yu Mincho", serif;
  font-style: italic;
  font-weight: 600;
  font-size: clamp(4rem, 9.5vw, 8.5rem);
  line-height: .95;
  letter-spacing: -.035em;
}
.hero-copy {
  margin: 28px 0 14px;
  font-family: "Yu Mincho", Georgia, serif;
  font-size: clamp(2rem, 4.6vw, 4.35rem);
  line-height: 1.25;
  text-wrap: balance;
}
.hero-lead { max-width: 760px; color: #d1cad3; font-size: clamp(1rem, 1.65vw, 1.18rem); text-wrap: pretty; }
.hero-actions,
.button-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 34px; align-items: center; }
.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: linear-gradient(135deg, #f0dfae, #b9944f); color: #1b140a; }
.button-secondary { border-color: var(--line); background: rgba(255,255,255,.025); }
.button-secondary:hover { border-color: rgba(230,210,155,.48); }
.is-disabled { opacity: .5; pointer-events: none; }
.text-link { color: var(--gold); border-bottom: 1px solid rgba(230,210,155,.35); }

.hero-glow { position: absolute; border-radius: 50%; filter: blur(26px); opacity: .5; }
.hero-glow-left { width: 420px; height: 420px; left: -180px; top: 18%; background: rgba(92,36,58,.18); }
.hero-glow-right { width: 520px; height: 520px; right: -120px; top: 14%; background: rgba(107,76,130,.18); }
.hero-stage { position: absolute; z-index: 1; right: 5vw; bottom: 9vh; width: min(44vw, 620px); aspect-ratio: 1/1; opacity: .86; }
.stage-arch {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(230,210,155,.2);
  border-radius: 52% 52% 8% 8% / 18% 18% 8% 8%;
  box-shadow: inset 0 0 80px rgba(107,76,130,.12), 0 0 90px rgba(230,210,155,.04);
}
.binaural-head { position: absolute; width: 46%; left: 27%; top: 24%; aspect-ratio: 1/1.25; }
.head-core {
  position: absolute;
  inset: 6% 18% 0;
  border-radius: 48% 48% 44% 44%;
  background: linear-gradient(180deg, #d3d0cb, #7f7b7d 55%, #2c2830 100%);
  box-shadow: 0 0 44px rgba(255,255,255,.06);
}
.ear { position: absolute; width: 23%; height: 33%; top: 28%; background: linear-gradient(180deg, #bbb5b2, #605b60); border-radius: 50%; z-index: 2; }
.ear-left { left: 0; }
.ear-right { right: 0; }
.scroll-cue { position: absolute; z-index: 4; bottom: 26px; left: 50%; transform: translateX(-50%); font-size: .68rem; letter-spacing: .2em; color: var(--muted); }

.section-next { background: linear-gradient(180deg, var(--bg), #0d0a11 60%, var(--bg)); }
.performance-visual {
  min-height: 560px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 22%, rgba(230,210,155,.14), transparent 22%),
    radial-gradient(circle at 22% 70%, rgba(92,36,58,.24), transparent 28%),
    radial-gradient(circle at 82% 64%, rgba(107,76,130,.24), transparent 28%),
    linear-gradient(145deg, #17101a, #0d0b11);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}
.performance-visual p { color: var(--gold); letter-spacing: .2em; font-size: .75rem; }
.performance-visual strong { font-family: Georgia, serif; font-size: clamp(2rem, 4vw, 4rem); }
.performance-visual span { color: var(--muted); }
.visual-noise { position: absolute; inset: 0; opacity: .16; background-image: radial-gradient(circle, rgba(255,255,255,.14) 1px, transparent 1px); background-size: 18px 18px; mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent); }
.cast-line { font-family: Georgia, serif; font-size: clamp(1.6rem, 3vw, 2.6rem); margin: 18px 0 28px; }
.cast-line span { color: var(--gold); padding: 0 8px; }
.performance-meta { margin: 0 0 26px; }
.performance-meta div { display: grid; grid-template-columns: 88px 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
.performance-meta dt { color: var(--gold); font-size: .74rem; letter-spacing: .12em; }
.performance-meta dd { margin: 0; }
.status-chip { display: inline-flex; padding: 4px 9px; border: 1px solid var(--line); border-radius: 999px; font-size: .8rem; }

.section-about { background: radial-gradient(circle at 85% 30%, rgba(107,76,130,.12), transparent 30%), var(--bg); }
.about-grid { grid-template-columns: 1.08fr .92fr; gap: 64px; }
.section-about p:not(.eyebrow) { color: var(--muted); }
.section-about h2 { max-width: 680px; }
.highlight-copy { border-left: 1px solid var(--gold-deep); padding-left: 18px; color: var(--text) !important; margin-top: 28px; }
.experience-diagram {
  min-height: 430px;
  position: relative;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,.06);
  background: radial-gradient(circle at 50% 48%, rgba(230,210,155,.09), transparent 22%), rgba(255,255,255,.015);
}
.diagram-center,
.diagram-cast,
.diagram-audience { position: absolute; }
.diagram-center { left: 50%; top: 46%; transform: translate(-50%,-50%); width: 140px; height: 140px; border: 1px solid var(--line); border-radius: 50%; display: grid; place-content: center; text-align: center; background: rgba(9,8,13,.9); }
.diagram-center span { color: var(--gold); font-size: .74rem; letter-spacing: .16em; }
.diagram-center strong { font-size: .8rem; margin-top: 4px; }
.diagram-cast { top: 44%; transform: translateY(-50%); color: var(--gold); font-family: Georgia, serif; }
.diagram-left { left: 8%; }
.diagram-right { right: 8%; }
.diagram-wave { position: absolute; top: 44%; width: 28%; height: 1px; background: linear-gradient(90deg, transparent, rgba(230,210,155,.55), transparent); }
.wave-left { left: 18%; }
.wave-right { right: 18%; }
.diagram-audience { left: 50%; bottom: 12%; transform: translateX(-50%); color: var(--muted); font-size: .68rem; letter-spacing: .16em; white-space: nowrap; }

.section-pillars { background: linear-gradient(180deg, #0b0910, #110d15, #0b0910); }
.section-pillars .section-heading { max-width: 1040px; }
.pillar-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.pillar-card { padding: 28px; min-height: 330px; border-radius: 20px; border: 1px solid rgba(230,210,155,.15); background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.01)); }
.pillar-number { color: rgba(230,210,155,.55); font-family: Georgia, serif; font-size: 2.4rem; }
.pillar-label { color: var(--gold); font-size: .72rem; letter-spacing: .14em; }
.pillar-card h3 { font-family: "Yu Mincho", Georgia, serif; font-size: 1.18rem; line-height: 1.5; text-wrap: balance; }
.pillar-card p:last-child { color: var(--muted); font-size: .94rem; }

.section-flow { overflow: hidden; }
.section-flow .section-heading { max-width: 980px; }
.flow-list { list-style: none; padding: 0; margin: 54px 0 0; display: grid; grid-template-columns: repeat(3,1fr); gap: 0; position: relative; }
.flow-list::before { content: ""; position: absolute; left: 8%; right: 8%; top: 28px; height: 1px; background: linear-gradient(90deg, transparent, rgba(230,210,155,.45), transparent); }
.flow-step { position: relative; padding: 0 46px 0 0; }
.flow-step > span { width: 56px; height: 56px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line); background: var(--bg); color: var(--gold); position: relative; z-index: 2; }
.flow-step h3 { font-family: "Yu Mincho", Georgia, serif; font-size: 1.42rem; margin: 26px 0 10px; text-wrap: balance; }
.flow-step p { color: var(--muted); max-width: 320px; }

.section-guide { background: linear-gradient(180deg, #14101a, #19141f 50%, #110e16); }
.guide-grid { align-items: start; grid-template-columns: .98fr 1.02fr; gap: 80px; }
.section-guide h2 { max-width: 610px; }
.assurance-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.assurance { padding: 22px; border: 1px solid rgba(255,255,255,.07); border-radius: 18px; background: rgba(255,255,255,.025); }
.assurance h3 { font-family: "Yu Mincho", Georgia, serif; margin-top: 0; font-size: 1.08rem; line-height: 1.5; text-wrap: balance; }
.assurance p { color: var(--muted); font-size: .92rem; }

.section-archive { background: var(--bg); }
.section-archive .section-heading { max-width: 1040px; }
.archive-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.archive-card { border: 1px solid rgba(255,255,255,.06); border-radius: 18px; overflow: hidden; background: rgba(255,255,255,.015); }
.archive-image { aspect-ratio: 16 / 10; display: grid; place-items: center; color: rgba(255,255,255,.42); letter-spacing: .18em; background: radial-gradient(circle at 50% 35%, rgba(230,210,155,.12), transparent 22%), linear-gradient(135deg, #211522, #0d0a11); }
.archive-card p, .archive-card h3, .archive-card span { margin-left: 18px; margin-right: 18px; }
.archive-card p { color: var(--gold); font-size: .78rem; letter-spacing: .08em; margin-top: 18px; }
.archive-card h3 { font-family: Georgia, serif; font-size: 1.35rem; }
.archive-card span { color: var(--muted); display: block; margin-bottom: 20px; }
.centered { text-align: center; margin-top: 34px; }

.section-faq { background: #0c0a10; }
.faq-shell { max-width: 960px; }
.section-faq .section-heading { max-width: 900px; }
.faq-list { border-top: 1px solid rgba(255,255,255,.08); }
.faq-item { border-bottom: 1px solid rgba(255,255,255,.08); }
.faq-item summary { cursor: pointer; padding: 22px 36px 22px 0; list-style: none; position: relative; font-family: "Yu Mincho", Georgia, serif; font-size: 1.08rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 2px; top: 50%; transform: translateY(-50%); color: var(--gold); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { color: var(--muted); margin-top: 0; padding: 0 0 24px; }

.final-cta { min-height: 560px; display: flex; align-items: center; text-align: center; position: relative; overflow: hidden; background: radial-gradient(circle at 50% 46%, rgba(107,76,130,.22), transparent 28%), linear-gradient(180deg, #0d0a11, #15101a 60%, #09080d); }
.final-cta .shell { position: relative; z-index: 2; max-width: 980px; }
.final-cta p:not(.eyebrow) { color: var(--muted); }
.centered-actions { justify-content: center; }
.final-glow { position: absolute; width: 520px; height: 520px; border-radius: 50%; left: 50%; top: 50%; transform: translate(-50%,-50%); background: rgba(230,210,155,.04); filter: blur(22px); }

.site-footer { padding: 50px 0 36px; border-top: 1px solid rgba(255,255,255,.06); background: #08070b; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: end; }
.site-footer .brand-mark { margin: 0; }
.site-footer p { color: var(--muted); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; justify-content: flex-end; color: var(--muted); font-size: .75rem; letter-spacing: .1em; }
.copyright { grid-column: 1 / -1; font-size: .72rem; margin-bottom: 0; }

.reveal { opacity: 1; transform: none; }
.js-ready .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.js-ready .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1180px) and (min-width: 981px) {
  :root { --shell: min(100% - 48px, 1080px); }
  .two-column { gap: 52px; }
  .section-heading h2 { font-size: clamp(2rem, 3.7vw, 3.3rem); }
  .section-about h2 { font-size: clamp(2rem, 3.35vw, 2.8rem); }
  .section-guide h2 { font-size: clamp(2rem, 3.45vw, 3rem); }
  .pillar-card { padding: 24px; }
  .pillar-card h3 { font-size: 1.08rem; }
}

@media (max-width: 980px) {
  :root { --shell: min(100% - 32px, 760px); }
  .desktop-nav { display: none; }
  .mini-cta, .menu-button { display: inline-flex; align-items: center; justify-content: center; }
  .two-column,
  .about-grid,
  .guide-grid { grid-template-columns: 1fr; gap: 42px; }
  .hero-stage { width: 64vw; right: -12vw; opacity: .52; }
  .hero-content { max-width: 690px; }
  .pillar-grid { grid-template-columns: 1fr 1fr; }
  .archive-grid { grid-template-columns: 1fr 1fr; }
  .archive-card:last-child { display: none; }
}

@media (max-width: 680px) {
  :root { --shell: calc(100% - 28px); --radius: 20px; }
  .section { padding: 84px 0; }
  .header-inner { min-height: 64px; }
  .hero { min-height: 94svh; align-items: flex-end; padding-bottom: 92px; }
  .hero-content { padding-top: 90px; }
  .hero h1 { font-size: clamp(3.6rem, 18vw, 5.6rem); }
  .hero-copy { font-size: clamp(2rem, 9vw, 3rem); }
  .hero-stage { width: 96vw; right: -28vw; bottom: 15vh; opacity: .36; }
  .hero-actions, .button-row { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .performance-visual { min-height: 420px; }
  .pillar-grid,
  .archive-grid,
  .assurance-list { grid-template-columns: 1fr; }
  .archive-card:last-child { display: block; }
  .flow-list { grid-template-columns: 1fr; gap: 34px; }
  .flow-list::before { left: 27px; right: auto; top: 12px; bottom: 12px; width: 1px; height: auto; background: linear-gradient(transparent, rgba(230,210,155,.45), transparent); }
  .flow-step { padding: 0 0 0 82px; min-height: 96px; }
  .flow-step > span { position: absolute; left: 0; top: 0; }
  .flow-step h3 { margin-top: 0; }
  .experience-diagram { min-height: 360px; }
  .diagram-left { left: 4%; }
  .diagram-right { right: 4%; }
  .diagram-wave { width: 22%; }
  .wave-left { left: 16%; }
  .wave-right { right: 16%; }
  .footer-grid { grid-template-columns: 1fr; align-items: start; }
  .site-footer nav { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js-ready .reveal { opacity: 1; transform: none; }
}