:root {
  --ink: #241f1b;
  --muted: #756d66;
  --paper: #f8f5ef;
  --cream: #eee8df;
  --wine: #6f2131;
  --wine-dark: #32151c;
  --gold: #ad8258;
  --line: rgba(36, 31, 27, 0.16);
  --sans: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  --serif: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--serif);
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 12px 18px;
  color: #fff;
  background: var(--wine-dark);
}
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(22px, 5vw, 76px);
  border-bottom: 1px solid rgba(36, 31, 27, 0.1);
  background: rgba(248, 245, 239, 0.94);
  backdrop-filter: blur(16px);
}
.wordmark {
  display: block;
  width: 150px;
  height: 64px;
  text-decoration: none;
}
.wordmark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  font: 12px/1 var(--sans);
  letter-spacing: 0.08em;
}
.main-nav a {
  padding: 9px 0;
  border-bottom: 1px solid transparent;
  text-decoration: none;
}
.main-nav a:hover,
.main-nav a:focus-visible { border-bottom-color: currentColor; }
.nav-contact {
  padding: 11px 18px !important;
  color: #fff;
  border: 1px solid var(--wine-dark) !important;
  background: var(--wine-dark);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--wine);
  font: 600 10px/1.5 var(--sans);
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
.display {
  margin: 0;
  font-size: clamp(46px, 6.8vw, 94px);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: 0.045em;
}
.section-title {
  margin: 0;
  font-size: clamp(30px, 4vw, 50px);
  font-weight: 500;
  line-height: 1.48;
  letter-spacing: 0.04em;
}
.body-copy {
  color: var(--muted);
  font: 14px/2.15 var(--sans);
}
.body-copy p { margin: 0 0 1.4em; }

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 13px 24px;
  border: 1px solid var(--wine-dark);
  color: #fff;
  background: var(--wine-dark);
  font: 12px/1.5 var(--sans);
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease;
}
.button:hover,
.button:focus-visible {
  color: var(--wine-dark);
  background: transparent;
}
.button.ghost {
  color: var(--wine-dark);
  background: transparent;
}
.button.ghost:hover,
.button.ghost:focus-visible {
  color: #fff;
  background: var(--wine-dark);
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 5px;
  border-bottom: 1px solid currentColor;
  color: var(--wine);
  font: 12px/1.5 var(--sans);
  letter-spacing: 0.08em;
  text-decoration: none;
}

.home-hero {
  position: relative;
  min-height: calc(100svh - 72px);
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: #2c201a;
}
.home-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(29, 17, 15, 0.78) 0%, rgba(29, 17, 15, 0.2) 56%, rgba(29, 17, 15, 0.08) 100%),
    linear-gradient(0deg, rgba(24, 15, 13, 0.45), transparent 46%);
}
.home-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 48%;
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: clamp(90px, 12vw, 170px) clamp(24px, 7vw, 108px) clamp(64px, 8vw, 110px);
}
.home-hero .eyebrow { color: #ead3ba; }
.hero-lead {
  max-width: 560px;
  margin: 32px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font: 14px/2.15 var(--sans);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}
.home-hero .button { border-color: #fff; color: var(--ink); background: #fff; }
.home-hero .button:hover { color: #fff; background: transparent; }
.home-hero .button.ghost { color: #fff; background: transparent; }
.home-hero .button.ghost:hover { color: var(--ink); background: #fff; }

.section {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: clamp(86px, 10vw, 150px) clamp(22px, 7vw, 108px);
}
.section-rule { border-top: 1px solid var(--line); }
.split-heading {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(360px, 1fr);
  gap: clamp(48px, 9vw, 140px);
  align-items: end;
}
.split-heading .body-copy {
  padding-left: clamp(24px, 4vw, 50px);
  border-left: 1px solid var(--line);
}

.concept-signature {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.concept-signature article {
  min-height: 210px;
  padding: 34px;
  border-right: 1px solid var(--line);
}
.concept-signature article:last-child { border-right: 0; }
.concept-signature b {
  display: block;
  margin-bottom: 26px;
  color: var(--wine);
  font: 11px/1 var(--sans);
  letter-spacing: 0.18em;
}
.concept-signature h3 {
  margin: 0 0 15px;
  font-size: 21px;
  font-weight: 500;
}
.concept-signature p {
  margin: 0;
  color: var(--muted);
  font: 12px/1.95 var(--sans);
}

.feature {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: 680px;
  background: var(--cream);
}
.feature-media { min-height: 560px; }
.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-copy {
  align-self: center;
  padding: clamp(50px, 7vw, 110px);
}
.feature-copy .body-copy { max-width: 520px; margin: 28px 0 34px; }
.feature-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 34px 0;
  background: var(--line);
  border: 1px solid var(--line);
}
.feature-facts div { padding: 20px; background: var(--cream); }
.feature-facts span {
  display: block;
  color: var(--muted);
  font: 10px/1.4 var(--sans);
  letter-spacing: 0.08em;
}
.feature-facts strong {
  display: block;
  margin-top: 8px;
  font-size: 19px;
  font-weight: 500;
}

.gem-preview {
  color: #fff;
  background: var(--wine-dark);
}
.gem-preview .section-title { max-width: 600px; }
.gem-preview .body-copy { max-width: 610px; color: rgba(255, 255, 255, 0.7); }
.gem-preview .eyebrow { color: #d7b68f; }
.gem-orbit {
  margin: 70px 0 54px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: clamp(10px, 2vw, 28px);
}
.gem-chip {
  text-decoration: none;
}
.gem-chip figure {
  margin: 0;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 50%;
  background: #f3efe9;
}
.gem-chip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: translateY(var(--offset-y, 0)) scale(var(--scale, 2.5));
  mix-blend-mode: darken;
  transition: transform 0.35s ease;
}
.gem-chip:hover img { transform: translateY(var(--offset-y, 0)) scale(calc(var(--scale, 2.5) * 1.05)); }
.gem-chip figcaption {
  margin-top: 16px;
  text-align: center;
  font: 11px/1.7 var(--sans);
}
.gem-preview-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.gem-preview .button { border-color: #fff; color: var(--wine-dark); background: #fff; }
.gem-preview .button:hover { color: #fff; background: transparent; }

.lineup-grid {
  margin-top: 70px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.9fr;
  border-top: 1px solid var(--line);
}
.lineup-card {
  min-height: 360px;
  padding: clamp(30px, 4vw, 52px);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.lineup-card:last-child { border-right: 0; }
.lineup-card b {
  color: var(--wine);
  font: 10px/1 var(--sans);
  letter-spacing: 0.18em;
}
.lineup-card h3 {
  margin: auto 0 16px;
  font-size: clamp(27px, 3vw, 40px);
  font-weight: 500;
}
.lineup-card p {
  margin: 0;
  color: var(--muted);
  font: 12px/1.95 var(--sans);
}
.lineup-card.primary {
  color: #fff;
  background: var(--wine);
}
.lineup-card.primary b,
.lineup-card.primary p { color: rgba(255, 255, 255, 0.75); }

.making {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  background: #e9e1d6;
}
.making-copy {
  padding: clamp(64px, 8vw, 126px) clamp(32px, 7vw, 104px);
  align-self: center;
}
.making-copy .body-copy { margin-top: 28px; }
.making-media { min-height: 620px; }
.making-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.process-grid {
  margin-top: 70px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.process-grid article {
  min-height: 270px;
  padding: 30px;
  border-right: 1px solid var(--line);
}
.process-grid article:last-child { border-right: 0; }
.process-grid article:nth-child(4) { border-right: 0; }
.process-grid article:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
.step-no {
  color: var(--wine);
  font: 11px/1 var(--sans);
  letter-spacing: 0.16em;
}
.process-grid h3 {
  margin: 62px 0 16px;
  font-size: 21px;
  font-weight: 500;
}
.process-grid p {
  margin: 0;
  color: var(--muted);
  font: 12px/1.95 var(--sans);
}

.specs {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: clamp(50px, 9vw, 130px);
}
.spec-table { margin: 0; border-top: 1px solid var(--line); }
.spec-table div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.spec-table dt {
  color: var(--muted);
  font: 11px/1.8 var(--sans);
}
.spec-table dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
}
.small-note {
  color: var(--muted);
  font: 11px/1.9 var(--sans);
}

.faq-list { margin-top: 60px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  position: relative;
  padding: 26px 52px 26px 0;
  cursor: pointer;
  font-size: 16px;
  line-height: 1.7;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 24px;
  font: 24px/1 var(--sans);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p {
  max-width: 820px;
  margin: -4px 0 26px;
  color: var(--muted);
  font: 13px/2 var(--sans);
}

.closing {
  position: relative;
  min-height: 650px;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
}
.closing img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.closing::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(32, 20, 16, 0.85), rgba(32, 20, 16, 0.08) 78%);
}
.closing-inner {
  position: relative;
  z-index: 1;
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 80px clamp(22px, 7vw, 108px);
}
.closing h2 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(38px, 5vw, 66px);
  font-weight: 500;
  line-height: 1.45;
}
.closing .hero-actions { margin-top: 30px; }
.closing .button { border-color: #fff; color: var(--ink); background: #fff; }
.closing .button.ghost { color: #fff; background: transparent; }

.page-hero {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: clamp(95px, 12vw, 165px) clamp(22px, 7vw, 108px) 75px;
  border-bottom: 1px solid var(--line);
}
.page-hero h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 78px);
  font-weight: 500;
  line-height: 1.28;
}
.page-hero p:last-child {
  max-width: 650px;
  margin: 30px 0 0;
  color: var(--muted);
  font: 14px/2.1 var(--sans);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.contact-card {
  min-height: 310px;
  padding: 38px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}
.contact-card:last-child { border-right: 0; }
.contact-card h2 { margin: 56px 0 16px; font-size: 25px; font-weight: 500; }
.contact-card p { margin: 0 0 24px; color: var(--muted); font: 12px/1.9 var(--sans); }
.contact-card .text-link { margin-top: auto; align-self: flex-start; }

.gem-detail {
  width: min(1340px, 100%);
  margin: 0 auto;
  padding: clamp(64px, 8vw, 110px) clamp(20px, 5vw, 74px);
}
.gem-detail-grid {
  display: grid;
  grid-template-columns: minmax(390px, 0.95fr) minmax(390px, 1.05fr);
  gap: clamp(52px, 8vw, 120px);
  align-items: start;
}
.gem-detail-photo {
  position: sticky;
  top: 100px;
  aspect-ratio: 1 / 1.1;
  overflow: hidden;
  background: #f3efe9;
}
.gem-detail-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(var(--gem-scale, 2.3));
  transform-origin: 50% 49%;
  mix-blend-mode: darken;
}
.gem-code {
  color: var(--wine);
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.18em;
}
.gem-detail h1 {
  margin: 18px 0 12px;
  font-size: clamp(38px, 5vw, 62px);
  font-weight: 500;
  line-height: 1.35;
}
.gem-meaning {
  margin: 0 0 36px;
  color: var(--muted);
  font: 14px/1.8 var(--sans);
}
.gem-message {
  margin: 36px 0;
  padding: 26px;
  border-left: 2px solid var(--wine);
  background: var(--cream);
  font-size: 18px;
  line-height: 1.9;
}
.gem-specs { margin: 0; border-top: 1px solid var(--line); }
.gem-specs div {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 22px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}
.gem-specs dt { color: var(--muted); font: 11px/1.7 var(--sans); }
.gem-specs dd { margin: 0; line-height: 1.7; }
.gem-detail-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; }

.site-footer {
  padding: 62px clamp(22px, 6vw, 90px) 36px;
  color: var(--muted);
  background: var(--cream);
}
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--line);
}
.footer-wordmark {
  width: 94px;
  height: 56px;
}
.footer-wordmark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.footer-copy { margin-top: 18px; font: 12px/1.9 var(--sans); }
.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(120px, 1fr));
  gap: 14px 34px;
  font: 12px/1.6 var(--sans);
}
.footer-nav a { text-decoration: none; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 30px;
  font: 10px/1.7 var(--sans);
}

@media (max-width: 960px) {
  .split-heading,
  .specs { grid-template-columns: 1fr; }
  .split-heading .body-copy { padding: 26px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .concept-signature { grid-template-columns: 1fr; }
  .concept-signature article { border-right: 0; border-bottom: 1px solid var(--line); }
  .concept-signature article:last-child { border-bottom: 0; }
  .feature, .making { grid-template-columns: 1fr; }
  .feature-media { order: 0; }
  .feature-copy { order: 1; }
  .gem-orbit { grid-template-columns: repeat(3, 1fr); }
  .gem-orbit .gem-chip:nth-child(n+4) { display: none; }
  .lineup-grid { grid-template-columns: 1fr; }
  .lineup-card { border-right: 0; border-bottom: 1px solid var(--line); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid article:nth-child(2) { border-right: 0; }
  .process-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-card { border-right: 0; border-bottom: 1px solid var(--line); }
  .gem-detail-grid { grid-template-columns: 1fr; }
  .gem-detail-photo { position: relative; top: auto; }
}

@media (max-width: 760px) {
  .site-header { height: 62px; }
  .wordmark {
    width: 120px;
    height: 52px;
  }
  .menu-toggle { display: grid; place-items: center; }
  .main-nav {
    position: fixed;
    inset: 62px 0 auto;
    min-height: calc(100svh - 62px);
    padding: 46px 26px;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 8px;
    background: var(--paper);
    font-size: 16px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 18px 0; border-bottom-color: var(--line); }
  .nav-contact { margin-top: 18px; text-align: center; }
  .home-hero { min-height: 760px; }
  .home-hero::after {
    background: linear-gradient(0deg, rgba(29, 17, 15, 0.84) 0%, rgba(29, 17, 15, 0.18) 78%);
  }
  .home-hero img { object-position: 50% 48%; }
  .hero-inner { padding: 390px 24px 58px; }
  .display { font-size: clamp(44px, 13vw, 62px); }
  .hero-lead { font-size: 13px; }
  .section { padding: 82px 20px; }
  .concept-signature { margin-top: 48px; }
  .concept-signature article { min-height: 0; padding: 28px 4px; }
  .feature { min-height: 0; }
  .feature-media { min-height: 430px; }
  .feature-copy { padding: 64px 22px; }
  .gem-orbit { margin-top: 50px; gap: 10px; }
  .gem-chip figcaption { font-size: 9px; }
  .lineup-grid { margin-top: 48px; }
  .lineup-card { min-height: 290px; padding: 30px 2px; }
  .making-media { min-height: 460px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-grid article {
    min-height: 0;
    padding: 30px 2px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .process-grid article:last-child { border-bottom: 0; }
  .process-grid h3 { margin-top: 42px; }
  .spec-table div { grid-template-columns: 95px 1fr; }
  .closing { min-height: 570px; }
  .footer-top, .footer-bottom { flex-direction: column; }
  .footer-nav { margin-top: 10px; }
  .contact-card { min-height: 260px; padding: 30px 2px; }
  .gem-detail { padding-top: 36px; }
  .gem-detail-grid { gap: 42px; }
  .gem-detail-photo { aspect-ratio: 1; }
  .gem-detail h1 { font-size: 38px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}