/* ==========================================================
   Japan Culture SX Lab — site stylesheet (2026-10 renewal)
   余白の白・石の灰。差し色は本小松石の青緑。
   ========================================================== */

:root {
  --paper: #f5f3ef;        /* 生成りの地 */
  --paper-2: #ebe8e2;      /* 一段沈めた地 */
  --stone: #d8d4cc;        /* 石灰 */
  --line: #cdc8be;         /* 罫 */
  --ink: #1b1c1d;          /* 墨 */
  --ink-2: #4a4d4c;        /* 本文グレー */
  --mute: #7b7e7a;         /* 注記 */
  --moss: #3f5f57;         /* 本小松石の青緑 */
  --moss-2: #2f4a44;
  --dark: #141617;         /* 展示セクションの地 */
  --dark-2: #1d2021;
  --on-dark: #e9e6df;
  --on-dark-2: #a9aaa5;

  --f-mincho: "Shippori Mincho", "Yu Mincho", "YuMincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  --f-gothic: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  --f-latin: "Cormorant Garamond", "Times New Roman", serif;

  --w: 1160px;
  --gutter: clamp(20px, 5vw, 56px);
  --sec: clamp(88px, 12vw, 168px);
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-gothic);
  font-size: 15.5px;
  line-height: 2;
  letter-spacing: .04em;
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--moss); outline-offset: 3px; }

.wrap { width: min(100% - var(--gutter) * 2, var(--w)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--ink); color: #fff; padding: 8px 16px; z-index: 200; }
.skip:focus { top: 12px; }

/* ---------- header ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--header-h);
  background: rgba(245, 243, 239, .9);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.header.is-scrolled { border-bottom-color: var(--line); }
.header__in { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 58px; height: auto; }
.brand__name { font-family: var(--f-latin); font-size: 19px; font-weight: 500; letter-spacing: .12em; line-height: 1.2; white-space: nowrap; }
.nav { display: flex; align-items: center; gap: clamp(16px, 2.2vw, 30px); font-size: 13px; letter-spacing: .1em; }
.nav a { position: relative; padding: 6px 0; white-space: nowrap; }
.nav a:not(.nav__cta)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .35s;
}
.nav a:not(.nav__cta):hover::after { transform: scaleX(1); }
.nav__cta { border: 1px solid var(--ink); padding: 7px 18px !important; transition: background .3s, color .3s; }
.nav__cta:hover { background: var(--ink); color: var(--paper); }
.menu-btn { display: none; width: 44px; height: 44px; position: relative; }
.menu-btn span { position: absolute; left: 10px; right: 10px; height: 1px; background: var(--ink); transition: transform .3s, top .3s; }
.menu-btn span:nth-child(1) { top: 17px; }
.menu-btn span:nth-child(2) { top: 26px; }
.menu-btn[aria-expanded="true"] span:nth-child(1) { top: 22px; transform: rotate(30deg); }
.menu-btn[aria-expanded="true"] span:nth-child(2) { top: 22px; transform: rotate(-30deg); }

@media (max-width: 960px) {
  .menu-btn { display: block; }
  .nav {
    position: fixed; inset: var(--header-h) 0 0 0; height: calc(100dvh - var(--header-h));
    background: var(--paper);
    flex-direction: column; align-items: flex-start; justify-content: flex-start; gap: 0;
    padding: 24px var(--gutter) 40px; font-size: 17px; font-family: var(--f-mincho);
    opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; overflow-y: auto;
  }
  .nav.is-open { opacity: 1; visibility: visible; }
  .nav a { width: 100%; padding: 18px 0; border-bottom: 1px solid var(--line); }
  .nav a::after { display: none; }
  .nav__cta { border: 0; border-bottom: 1px solid var(--line); padding: 18px 0 !important; }
  .nav__cta:hover { background: none; color: inherit; }
  .brand__name { font-size: 17px; }
  .brand img { width: 46px; }
}

/* ---------- shared pieces ---------- */
.label {
  font-family: var(--f-latin); font-size: 15px; font-weight: 500; letter-spacing: .22em; text-transform: uppercase;
  color: var(--moss); display: flex; align-items: center; gap: 14px; line-height: 1.4;
}
.label::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.h2 {
  font-family: var(--f-mincho); font-weight: 500; font-size: clamp(27px, 3.3vw, 44px);
  line-height: 1.55; letter-spacing: .08em; margin-top: 18px;
  text-wrap: balance; word-break: auto-phrase;
}
.h3 { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(20px, 2vw, 25px); line-height: 1.6; letter-spacing: .08em; }
.lead { color: var(--ink-2); max-width: 40em; }
.note { font-size: 12.5px; color: var(--mute); line-height: 1.8; }
.section { padding-block: var(--sec); }
.section--sunk { background: var(--paper-2); }
.sec-head { margin-bottom: clamp(44px, 6vw, 80px); }
.sec-head .lead { margin-top: 24px; }

.btn {
  display: inline-flex; align-items: center; gap: 16px; min-height: 52px; padding: 12px 26px;
  border: 1px solid var(--ink); font-size: 14px; letter-spacing: .12em; line-height: 1.5;
  transition: background .3s, color .3s, border-color .3s;
}
.btn::after { content: "→"; font-family: var(--f-latin); font-size: 18px; transition: transform .3s; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:hover::after { transform: translateX(4px); }
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--moss-2); border-color: var(--moss-2); }
.btn--light { border-color: var(--on-dark); color: var(--on-dark); }
.btn--light:hover { background: var(--on-dark); color: var(--dark); }
.btn--light.btn--solid { background: var(--on-dark); color: var(--dark); }
.btn--light.btn--solid:hover { background: #fff; border-color: #fff; }
.btns { display: flex; flex-wrap: wrap; gap: 14px; }
.text-link { border-bottom: 1px solid currentColor; padding-bottom: 2px; transition: color .3s; }
.text-link:hover { color: var(--moss); }
.ext::after { content: " ↗"; font-family: var(--f-latin); }

/* reveal (JSが有効な時だけ。内容は常にDOM上にあり、無効時は最初から表示) */
.js .rv { opacity: 0; transform: translateY(14px); transition: opacity .8s ease, transform .8s ease; }
.js .rv.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .rv { opacity: 1; transform: none; transition: none; }
}

/* ---------- hero ---------- */
.hero { padding-top: calc(var(--header-h) + clamp(28px, 5vw, 64px)); padding-bottom: clamp(56px, 8vw, 104px); }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; column-gap: clamp(28px, 6vw, 96px); align-items: start; }
.hero__visual { grid-column: 1; grid-row: 1; }
.hero__visual img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; object-position: 58% 62%; }
.hero__visual figcaption { margin-top: 12px; font-size: 12px; color: var(--mute); letter-spacing: .1em; }
.hero__title {
  grid-column: 2; grid-row: 1;
  writing-mode: vertical-rl; font-family: var(--f-mincho); font-weight: 500;
  font-size: clamp(38px, 5vw, 72px); line-height: 1.5; letter-spacing: .2em;
  font-feature-settings: normal; margin-top: -.1em;
}
.hero__title span { display: block; }
.hero__title span + span { margin-top: 1.6em; }
.hero__body { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(24px, 5vw, 80px); margin-top: clamp(36px, 5vw, 64px); align-items: end; }
.hero__en { font-family: var(--f-latin); font-size: clamp(22px, 2.4vw, 32px); font-style: italic; font-weight: 400; line-height: 1.4; letter-spacing: .04em; color: var(--ink); }
.hero__lead { color: var(--ink-2); margin-top: 16px; }
.hero__body .btns { justify-content: flex-end; }
@media (max-width: 760px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__title { grid-column: 1; grid-row: 1; writing-mode: horizontal-tb; font-size: clamp(34px, 10vw, 46px); letter-spacing: .1em; margin: 0 0 28px; }
  .hero__title span + span { margin-top: 0; }
  .hero__visual { grid-row: 2; margin-inline: calc(var(--gutter) * -1); }
  .hero__visual figcaption { padding-inline: var(--gutter); }
  .hero__visual img { aspect-ratio: 4 / 3; }
  .hero__body { grid-template-columns: 1fr; }
  .hero__body .btns { justify-content: flex-start; }
}

/* 最新実績の帯 */
.ticker { border-block: 1px solid var(--line); }
.ticker a { display: grid; grid-template-columns: auto 1fr auto; gap: clamp(16px, 3vw, 40px); align-items: center; padding-block: 22px; transition: color .3s; }
.ticker a:hover { color: var(--moss); }
.ticker__tag { font-family: var(--f-latin); font-size: 14px; letter-spacing: .2em; text-transform: uppercase; color: var(--moss); white-space: nowrap; }
.ticker__txt { font-family: var(--f-mincho); font-size: 16px; line-height: 1.7; }
.ticker__txt small { font-family: var(--f-gothic); font-size: 12.5px; color: var(--mute); margin-left: 1em; white-space: nowrap; }
.ticker__go { font-family: var(--f-latin); font-size: 22px; }
@media (max-width: 760px) {
  .ticker a { grid-template-columns: 1fr auto; row-gap: 4px; }
  .ticker__tag { grid-column: 1 / -1; }
  .ticker__txt small { display: block; margin-left: 0; white-space: normal; }
}

/* ---------- about ---------- */
.about__grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); }
.about__statement { font-family: var(--f-mincho); font-size: clamp(18px, 1.7vw, 21px); line-height: 2.2; letter-spacing: .08em; }
.vision { margin-top: clamp(44px, 5vw, 64px); padding: clamp(28px, 4vw, 44px) 0 0; border-top: 1px solid var(--ink); }
.vision__q { font-family: var(--f-mincho); font-size: clamp(21px, 2.3vw, 29px); line-height: 1.8; letter-spacing: .1em; margin: 14px 0 20px; }
.sub { font-family: var(--f-latin); font-size: 14px; letter-spacing: .22em; text-transform: uppercase; color: var(--mute); }
.plain-list li { position: relative; padding-left: 1.4em; color: var(--ink-2); }
.plain-list li + li { margin-top: 6px; }
.plain-list li::before { content: ""; position: absolute; left: 0; top: 1em; width: 8px; height: 1px; background: var(--moss); }
.mission { counter-reset: m; margin-top: 14px; border-top: 1px solid var(--line); }
.mission li { counter-increment: m; display: grid; grid-template-columns: 56px 1fr; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--line); }
.mission li::before { content: counter(m, decimal-leading-zero); font-family: var(--f-latin); font-size: 20px; color: var(--moss); letter-spacing: .08em; }
@media (max-width: 860px) { .about__grid { grid-template-columns: 1fr; } }

/* ---------- activities: scheme ---------- */
.scheme {
  display: grid; grid-template-columns: minmax(0, 1fr) 132px minmax(0, 1.5fr) 132px minmax(0, 1fr);
  align-items: stretch; background: var(--paper); border: 1px solid var(--line); padding: clamp(24px, 4vw, 48px);
}
.scheme__col { display: flex; flex-direction: column; justify-content: center; gap: 14px; }
.scheme__node { border: 1px solid var(--ink); padding: 22px 16px; text-align: center; font-family: var(--f-mincho); font-size: 16px; line-height: 1.7; letter-spacing: .1em; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.scheme__node small { display: block; font-family: var(--f-gothic); font-size: 12px; color: var(--mute); letter-spacing: .04em; margin-top: 6px; }
.scheme__flow { display: flex; flex-direction: column; justify-content: space-around; text-align: center; font-size: 12.5px; color: var(--ink-2); padding-inline: 10px; line-height: 1.5; }
.scheme__flow li { display: flex; flex-direction: column; align-items: center; }
.scheme__flow i { font-style: normal; font-family: var(--f-latin); font-size: 26px; line-height: 1; color: var(--moss); }
.scheme__flow .v { display: none; }
.scheme__core { background: var(--moss); color: #f3f1ec; padding: 26px 22px 22px; }
.scheme__core-name { font-family: var(--f-latin); font-size: 18px; letter-spacing: .14em; text-align: center; margin-bottom: 16px; }
.scheme__core ol { display: grid; gap: 10px; }
.scheme__core li { background: var(--paper); color: var(--ink); padding: 14px 16px; text-align: center; line-height: 1.6; }
.scheme__core li b { display: block; font-family: var(--f-mincho); font-weight: 500; font-size: 20px; letter-spacing: .3em; margin-right: -.3em; }
.scheme__core li span { font-size: 12.5px; color: var(--ink-2); }
.scheme__core-foot { margin-top: 12px; text-align: center; font-size: 13px; letter-spacing: .12em; border: 1px solid rgba(255, 255, 255, .5); padding: 8px; }
@media (max-width: 900px) {
  .scheme { grid-template-columns: 1fr; }
  .scheme__col { flex-direction: row; }
  .scheme__flow { flex-direction: row; padding: 14px 0; }
  .scheme__flow .h { display: none; }
  .scheme__flow .v { display: inline; }
}

.pillars { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: clamp(56px, 8vw, 104px); border-top: 1px solid var(--ink); }
.pillar { padding: 28px clamp(16px, 2vw, 28px) 8px 0; }
.pillar + .pillar { border-left: 1px solid var(--line); padding-left: clamp(16px, 2vw, 28px); }
.pillar__en { font-family: var(--f-latin); font-size: 15px; letter-spacing: .22em; color: var(--moss); }
.pillar__t { font-family: var(--f-mincho); font-weight: 500; font-size: 19px; line-height: 1.7; letter-spacing: .08em; margin: 10px 0 12px; }
.pillar p { font-size: 14px; color: var(--ink-2); line-height: 1.95; }
@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr 1fr; }
  .pillar { padding: 24px 16px 24px 0; }
  .pillar:nth-child(odd) { border-left: 0; padding-left: 0; }
  .pillar:nth-child(n+3) { border-top: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .pillars { grid-template-columns: 1fr; }
  .pillar + .pillar { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
}

/* ---------- exhibition (dark) ---------- */
.exh { background: var(--dark); color: var(--on-dark); }
.exh .label { color: #9fb8b0; }
.exh__top { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 80px); align-items: center; }
.exh__main img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.exh__title { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(36px, 4.4vw, 60px); line-height: 1.3; letter-spacing: .12em; margin: 18px 0 8px; white-space: nowrap; }
.exh__sub { font-family: var(--f-latin); font-style: italic; font-size: 18px; letter-spacing: .08em; color: var(--on-dark-2); }
.badge { display: inline-block; font-size: 11.5px; letter-spacing: .16em; border: 1px solid currentColor; padding: 2px 10px; line-height: 1.8; vertical-align: middle; }
.exh__catch { font-family: var(--f-mincho); font-size: 17px; line-height: 2.1; letter-spacing: .1em; margin: 26px 0 0; }
.facts { margin-top: 28px; border-top: 1px solid rgba(255, 255, 255, .22); font-size: 14px; }
.facts div { display: grid; grid-template-columns: 7.5em 1fr; gap: 12px; padding: 13px 0; border-bottom: 1px solid rgba(255, 255, 255, .22); line-height: 1.8; }
.facts dt { color: var(--on-dark-2); letter-spacing: .14em; }
.exh__text { margin-top: clamp(48px, 6vw, 80px); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 5vw, 80px); align-items: start; }
.exh__text p { color: #c9c7c0; }
.exh__text p + p { margin-top: 1.2em; }
.exh__strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; margin-top: clamp(40px, 5vw, 64px); }
.exh__strip a { position: relative; display: block; overflow: hidden; background: #000; }
.exh__strip img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; transition: transform .8s ease, opacity .4s; }
.exh__strip a:hover img { transform: scale(1.04); opacity: .85; }
.exh__strip span { position: absolute; left: 12px; bottom: 8px; font-family: var(--f-latin); font-size: 15px; letter-spacing: .14em; color: #fff; }
.exh .btns { margin-top: clamp(36px, 4vw, 52px); }
.tech { margin-top: clamp(56px, 7vw, 96px); border-top: 1px solid rgba(255, 255, 255, .22); padding-top: 32px; display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.tech__t { font-family: var(--f-mincho); font-size: 19px; letter-spacing: .14em; line-height: 1.8; }
.tech__t small { display: block; font-family: var(--f-gothic); font-size: 13px; color: var(--on-dark-2); letter-spacing: .04em; margin-top: 8px; line-height: 1.9; }
.tech__list { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
.tech__list img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.tech__list figcaption { font-size: 12.5px; letter-spacing: .1em; margin-top: 8px; color: #c9c7c0; text-align: center; }
@media (max-width: 900px) {
  .exh__top, .exh__text, .tech { grid-template-columns: 1fr; }
  .exh__strip { grid-template-columns: 1fr 1fr; }
  .tech__list { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- projects ---------- */
.project { border-top: 1px solid var(--ink); padding-top: clamp(36px, 5vw, 64px); }
.project + .project { margin-top: clamp(80px, 10vw, 140px); }
.project__intro { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.project__no { font-family: var(--f-latin); font-size: 15px; letter-spacing: .22em; text-transform: uppercase; color: var(--moss); line-height: 1.4; }
.project__t { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(24px, 2.6vw, 34px); line-height: 1.6; letter-spacing: .08em; margin: 12px 0 10px; }
.project__with { font-size: 13px; color: var(--moss); letter-spacing: .1em; line-height: 1.8; }
.project__body { margin-top: 22px; }
.project__intro > .project__body { margin-top: 0; }
.project__body p { color: var(--ink-2); }
.project__body p + p { margin-top: 1.2em; }
.project__body .note { margin-top: .8em; }
/* 2枚の画像を同じ高さで並べる（列幅＝各画像の縦横比） */
.project__pair { display: grid; grid-template-columns: .5863fr .7296fr; gap: 12px; }
.project__pair img:first-child { aspect-ratio: 720 / 1228; }
.project__pair img:last-child { aspect-ratio: 367 / 503; }
.project__pair img { width: 100%; object-fit: cover; }

/* 本小松石とは */
.stone { margin-top: clamp(56px, 7vw, 96px); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(20px, 6vw, 96px); padding-top: 28px; border-top: 1px solid var(--line); }
.stone__t { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(19px, 1.9vw, 23px); line-height: 1.7; letter-spacing: .1em; }
.stone__t small { font-size: .62em; letter-spacing: .06em; color: var(--mute); margin-left: .2em; }
.stone__body p { color: var(--ink-2); }
.stone__body p + p { margin-top: 1.2em; }

/* 動画と3Dビューア：同じ16:9の枠で高さを揃える */
.media { margin-top: clamp(32px, 4vw, 48px); display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 2vw, 24px); }
.media__frame { position: relative; aspect-ratio: 16 / 9; background: var(--dark); overflow: hidden; }
.media__frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.viewer__frame { display: grid; place-items: center; }
.viewer__frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .5; }
.viewer__frame iframe { background: #fff; }
.viewer__btn {
  position: relative; display: inline-flex; align-items: center; gap: 12px;
  background: var(--paper); color: var(--ink); padding: 14px 26px 14px 22px;
  font-size: 14px; letter-spacing: .12em; line-height: 1.5; white-space: nowrap;
  transition: background .3s, color .3s;
}
.viewer__btn::before { content: ""; border-left: 11px solid currentColor; border-block: 7px solid transparent; }
.viewer__btn:hover { background: var(--moss); color: #fff; }
.figcap { font-size: 12px; color: var(--mute); margin-top: 10px; line-height: 1.7; letter-spacing: .06em; }
@media (max-width: 760px) {
  .media { grid-template-columns: 1fr; }
  .viewer__btn { padding: 12px 18px 12px 16px; font-size: 13px; gap: 10px; }
}

/* デジタルアーカイブの仕組み図 */
.archive {
  margin-top: clamp(44px, 5vw, 64px);
  display: grid; grid-template-columns: minmax(0, 1fr) 112px minmax(0, 1.15fr) 44px minmax(0, 1.25fr) 44px minmax(0, 1fr);
  align-items: center; background: var(--paper-2); border: 1px solid var(--line);
  padding: clamp(24px, 4vw, 48px) clamp(20px, 3vw, 40px);
}
.archive__node { border: 1px solid var(--ink); padding: 22px 14px; text-align: center; font-family: var(--f-mincho); font-size: 15px; line-height: 1.8; letter-spacing: .06em; background: var(--paper); }
.archive__src span { display: inline-block; }
.archive__arrow { display: flex; flex-direction: column; align-items: center; text-align: center; font-size: 12px; line-height: 1.5; color: var(--ink-2); padding-inline: 6px; }
.archive__arrow i { font-style: normal; font-family: var(--f-latin); font-size: 26px; line-height: 1; color: var(--moss); }
.archive__arrow .v { display: none; }
.archive__arrow b { font-family: var(--f-latin); font-weight: 500; font-size: 14px; letter-spacing: .12em; color: var(--moss); margin-top: 4px; }
.archive__core { background: var(--moss); color: #f3f1ec; padding: 22px 16px 18px; text-align: center; }
.archive__core-name { font-family: var(--f-latin); font-size: 18px; letter-spacing: .16em; text-transform: uppercase; line-height: 1.4; }
.archive__data { margin: 14px auto; background: var(--paper); color: var(--ink); font-family: var(--f-latin); font-size: 19px; letter-spacing: .14em; padding: 12px 8px; line-height: 1.3; }
.archive__core-foot { font-size: 12px; line-height: 1.8; letter-spacing: .04em; color: #dfe6e2; }
.archive__uses-t { font-size: 12.5px; letter-spacing: .1em; color: var(--moss); text-align: center; margin-bottom: 10px; line-height: 1.6; }
.archive__uses ul { display: grid; gap: 8px; }
.archive__uses li { border: 1px solid var(--ink); background: var(--paper); padding: 10px 12px; text-align: center; font-family: var(--f-mincho); font-size: 15px; line-height: 1.5; letter-spacing: .08em; }
.archive__uses li b { display: block; font-family: var(--f-latin); font-weight: 500; font-size: 13px; letter-spacing: .18em; text-transform: uppercase; color: var(--moss); }
.archive__new { background: var(--ink); color: var(--paper); border-color: var(--ink); font-family: var(--f-gothic); font-size: 12.5px; }
.archive__new span { display: block; font-family: var(--f-latin); font-size: 19px; letter-spacing: .1em; line-height: 1.35; margin-bottom: 8px; }
.archive__phase { margin-top: 28px; border-top: 2px solid var(--moss); padding-top: 12px; font-size: 13px; color: var(--ink-2); line-height: 1.8; }
.archive__phase b { display: block; font-family: var(--f-mincho); font-weight: 500; font-size: 17px; letter-spacing: .14em; color: var(--ink); margin-bottom: 2px; }
.archive__phase--keep { grid-column: 1 / 4; }
.archive__phase--make { grid-column: 4 / 8; border-top-color: var(--ink); margin-left: 16px; }
@media (max-width: 900px) {
  .archive { grid-template-columns: 1fr; }
  .archive__arrow { padding: 10px 0; }
  .archive__arrow .h { display: none; }
  .archive__arrow .v { display: inline; }
  .archive__uses ul { grid-template-columns: repeat(3, 1fr); }
  .archive__phase--keep, .archive__phase--make { grid-column: auto; margin-left: 0; }
  .archive__phase--make { margin-top: 18px; }
}
@media (max-width: 480px) { .archive__uses ul { grid-template-columns: 1fr; } }

/* ケーススタディ（データが重いため外部リンクのみ） */
.case { margin-top: clamp(56px, 7vw, 96px); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 6vw, 96px); align-items: center; }
.case__img img { width: 100%; background: #e6e6e4; }
.case__t { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(20px, 2vw, 25px); letter-spacing: .08em; line-height: 1.6; margin: 10px 0 12px; }
.case p:not(.project__no):not(.note) { color: var(--ink-2); }
.case__links { margin-top: 22px; border-top: 1px solid var(--ink); }
.case__links a { display: flex; justify-content: space-between; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); font-family: var(--f-mincho); font-size: 15.5px; letter-spacing: .1em; transition: color .3s, padding .3s; }
.case__links a:hover { color: var(--moss); padding-left: 6px; }
.case__links a::after { content: "View ↗"; font-family: var(--f-latin); letter-spacing: .14em; font-size: 15px; color: var(--moss); }
@media (max-width: 860px) {
  .project__intro, .stone, .case { grid-template-columns: 1fr; }
}

/* ---------- works teaser ---------- */
.teaser__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(12px, 2vw, 24px); }
.teaser__item img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; background: var(--dark); transition: opacity .4s; }
.teaser__item:hover img { opacity: .86; }
.teaser__no { font-family: var(--f-latin); font-size: 15px; letter-spacing: .16em; color: var(--moss); margin-top: 12px; display: block; line-height: 1.4; }
.teaser__name { font-family: var(--f-mincho); font-size: 15.5px; line-height: 1.6; letter-spacing: .06em; display: block; }
.teaser__price { font-size: 13px; color: var(--ink-2); display: block; line-height: 1.8; }
.teaser__foot { margin-top: clamp(36px, 4vw, 56px); display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px; }
@media (max-width: 860px) { .teaser__grid { grid-template-columns: 1fr 1fr; row-gap: 28px; } }

/* ---------- members ---------- */
.founder { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); padding-bottom: clamp(48px, 6vw, 72px); }
.founder__photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 20%; filter: grayscale(.15); }
.person__role { font-size: 12.5px; color: var(--mute); letter-spacing: .06em; line-height: 1.8; }
.person__name { font-family: var(--f-mincho); font-weight: 500; font-size: 24px; letter-spacing: .14em; line-height: 1.5; }
.person__en { font-family: var(--f-latin); font-size: 14px; letter-spacing: .2em; color: var(--moss); text-transform: uppercase; display: block; margin-bottom: 10px; }
.person__bio { color: var(--ink-2); font-size: 14.5px; margin-top: 14px; }
.message { margin-top: 28px; padding-left: clamp(18px, 2.4vw, 28px); border-left: 1px solid var(--ink); }
.message__t { font-family: var(--f-mincho); font-size: 16.5px; letter-spacing: .1em; margin-bottom: 10px; }
.message p { font-size: 14.5px; color: var(--ink-2); }
.message p + p { margin-top: 1em; }
.people { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); }
.people .person { padding: 30px clamp(16px, 2.4vw, 32px) 30px 0; }
.people .person + .person { border-left: 1px solid var(--line); padding-left: clamp(16px, 2.4vw, 32px); }
.people .person__name { font-size: 21px; }
.partners { margin-top: clamp(40px, 5vw, 64px); display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 2vw, 24px); }
.partner { border: 1px solid var(--line); padding: clamp(22px, 3vw, 32px); background: var(--paper); }
.partner__k { font-size: 12px; letter-spacing: .2em; color: var(--moss); }
.partner__n { font-family: var(--f-mincho); font-size: 19px; letter-spacing: .08em; line-height: 1.6; margin: 6px 0 8px; }
.partner p { font-size: 14px; color: var(--ink-2); line-height: 1.9; }
@media (max-width: 860px) {
  .founder { grid-template-columns: 1fr; }
  .founder__photo { max-width: 180px; }
  .people { grid-template-columns: 1fr; }
  .people .person + .person { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .partners { grid-template-columns: 1fr; }
}

/* ---------- contact ---------- */
.contact__grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); }
.contact__mail { font-family: var(--f-latin); font-size: clamp(22px, 2.4vw, 30px); letter-spacing: .06em; border-bottom: 1px solid currentColor; display: inline-block; line-height: 1.5; margin-top: 8px; }
.contact__mail:hover { color: var(--moss); }
.form { display: grid; gap: 22px; }
.field label { display: block; font-size: 13px; letter-spacing: .12em; margin-bottom: 6px; }
.field label em { font-style: normal; color: var(--moss); font-size: 11.5px; margin-left: .6em; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid var(--ink);
  padding: 10px 2px; border-radius: 0; letter-spacing: .04em; line-height: 1.7;
}
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 14px) 55%, calc(100% - 8px) 55%; background-size: 6px 6px; background-repeat: no-repeat; }
.field textarea { min-height: 150px; resize: vertical; border: 1px solid var(--ink); padding: 12px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 0; border-color: var(--moss); box-shadow: 0 1px 0 var(--moss); }
.form .btn { justify-self: start; }
@media (max-width: 860px) { .contact__grid { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 56px 0 36px; font-size: 13px; }
.footer__in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; align-items: flex-start; }
.footer__nav { display: flex; flex-wrap: wrap; gap: 10px 26px; letter-spacing: .1em; max-width: 760px; }
.footer__nav a:hover { color: var(--moss); }
.footer__copy { margin-top: 44px; font-family: var(--f-latin); font-size: 13.5px; letter-spacing: .12em; color: var(--mute); }

/* ==========================================================
   works page
   ========================================================== */
.page-head { padding-top: calc(var(--header-h) + clamp(48px, 8vw, 112px)); padding-bottom: clamp(48px, 6vw, 80px); }
.crumb { font-size: 12px; color: var(--mute); letter-spacing: .1em; margin-bottom: 28px; }
.crumb a:hover { color: var(--ink); }
.crumb span { margin: 0 .6em; }
.page-title { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(34px, 5vw, 64px); letter-spacing: .14em; line-height: 1.4; margin-top: 18px; }
.page-head__grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: clamp(28px, 6vw, 96px); align-items: end; margin-top: 12px; }
@media (max-width: 860px) { .page-head__grid { grid-template-columns: 1fr; } }

.flow { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); counter-reset: f; }
.flow li { counter-increment: f; padding: 26px clamp(16px, 2.4vw, 32px) 26px 0; }
.flow li + li { border-left: 1px solid var(--line); padding-left: clamp(16px, 2.4vw, 32px); }
.flow li::before { content: counter(f, decimal-leading-zero); font-family: var(--f-latin); font-size: 22px; color: var(--moss); letter-spacing: .08em; display: block; line-height: 1.4; }
.flow b { display: block; font-family: var(--f-mincho); font-weight: 500; font-size: 18px; letter-spacing: .1em; margin: 4px 0 6px; }
.flow p { font-size: 14px; color: var(--ink-2); line-height: 1.9; }
@media (max-width: 760px) {
  .flow { grid-template-columns: 1fr; }
  .flow li + li { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
}

.series-nav { position: sticky; top: var(--header-h); z-index: 50; background: rgba(245, 243, 239, .94); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); border-block: 1px solid var(--line); }
.series-nav ul { display: flex; gap: clamp(18px, 3vw, 36px); overflow-x: auto; padding-block: 14px; font-family: var(--f-latin); font-size: 15.5px; letter-spacing: .1em; white-space: nowrap; scrollbar-width: none; }
.series-nav ul::-webkit-scrollbar { display: none; }
.series-nav a { color: var(--ink-2); }
.series-nav a:hover { color: var(--moss); }
.series-nav small { font-size: 12.5px; color: var(--mute); margin-left: .5em; letter-spacing: .06em; }

.series { padding-top: clamp(64px, 8vw, 112px); scroll-margin-top: calc(var(--header-h) + 40px); }
.series__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; border-bottom: 1px solid var(--ink); padding-bottom: 14px; margin-bottom: clamp(32px, 4vw, 56px); }
.series__t { font-family: var(--f-latin); font-weight: 500; font-size: clamp(24px, 2.8vw, 34px); letter-spacing: .08em; line-height: 1.4; }
.series__range { font-family: var(--f-latin); font-size: 16px; letter-spacing: .16em; color: var(--mute); }
.works { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(48px, 6vw, 88px) clamp(28px, 4vw, 64px); }
.work { display: flex; flex-direction: column; scroll-margin-top: calc(var(--header-h) + 72px); }
.work__img { background: var(--dark); position: relative; }
.work__img img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.work__head { display: grid; grid-template-columns: auto 1fr; gap: 6px 18px; align-items: baseline; margin-top: 20px; }
.work__no { font-family: var(--f-latin); font-size: 34px; line-height: 1; color: var(--moss); letter-spacing: .04em; grid-row: span 2; }
.work__name { font-family: var(--f-mincho); font-weight: 500; font-size: clamp(19px, 2vw, 23px); line-height: 1.6; letter-spacing: .08em; }
.work__catch { font-size: 13px; color: var(--mute); line-height: 1.8; }
.work__meta { margin-top: 16px; border-top: 1px solid var(--line); font-size: 14px; }
.work__meta div { display: grid; grid-template-columns: 5em 1fr; padding: 9px 0; border-bottom: 1px solid var(--line); line-height: 1.8; }
.work__meta dt { color: var(--mute); letter-spacing: .12em; font-size: 12.5px; padding-top: 2px; }
.work__price { font-family: var(--f-latin); font-size: 21px; letter-spacing: .06em; line-height: 1.3; }
.work__price small { font-family: var(--f-gothic); font-size: 12px; color: var(--ink-2); margin-left: .4em; letter-spacing: .04em; }
.work__desc { font-size: 14px; color: var(--ink-2); margin-top: 14px; line-height: 2; flex: 1; }
.work__foot { margin-top: 20px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.work__status { font-size: 12px; letter-spacing: .14em; color: var(--moss); }
.work__status::before { content: "●"; font-size: 8px; margin-right: .7em; vertical-align: 2px; }
.work .s-sold { display: none; }
.work[data-status="sold"] .s-open { display: none; }
.work[data-status="sold"] .s-sold { display: inline; color: var(--mute); }
.work[data-status="sold"] .work__img img { opacity: .55; }
.work[data-status="sold"] .work__img::after { content: "SOLD"; position: absolute; right: 14px; top: 12px; color: #fff; font-family: var(--f-latin); letter-spacing: .24em; font-size: 15px; }
.work .btn { min-height: 46px; padding: 9px 20px; font-size: 13px; }
@media (max-width: 760px) { .works { grid-template-columns: 1fr; } }

.terms { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: clamp(28px, 6vw, 96px); }
.terms dl div { display: grid; grid-template-columns: 9em 1fr; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.terms dl div:first-child { border-top: 1px solid var(--ink); }
.terms dt { font-family: var(--f-mincho); letter-spacing: .1em; }
.terms dd { color: var(--ink-2); }
@media (max-width: 860px) { .terms { grid-template-columns: 1fr; } .terms dl div { grid-template-columns: 1fr; gap: 2px; } }

.cta-band { background: var(--dark); color: var(--on-dark); padding-block: clamp(64px, 8vw, 112px); }
.cta-band__in { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.cta-band__t { font-family: var(--f-mincho); font-size: clamp(22px, 2.6vw, 32px); letter-spacing: .12em; line-height: 1.7; }
.cta-band p:not(.cta-band__t) { color: var(--on-dark-2); font-size: 14px; margin-top: 8px; }