@import url('https://fonts.googleapis.com/css2?family=Jost:wght@300;400&family=Noto+Sans+JP:wght@300;400&display=swap');

:root {
  --bg: #ffffff;
  --ink: #1e1e1e;
  --sub: #6b6b6b;
  --line: #e7e5e1;
  --tint: #f6f5f2;
  --latin: 'Jost', 'Futura', 'Century Gothic', sans-serif;
  --ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ Pro W3', sans-serif;
  --gutter: clamp(20px, 4vw, 56px);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ja);
  font-weight: 300;
  font-size: 13px;
  line-height: 2.1;
  letter-spacing: .08em;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-weight: 300; }

.latin {
  font-family: var(--latin);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: .28em;
}
.label { font-family: var(--latin); font-size: 10px; letter-spacing: .3em; text-transform: uppercase; color: var(--sub); }

/* ---------- Header ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: 72px;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  padding: 0 var(--gutter);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color .4s;
  border-bottom: 1px solid transparent;
}
.header.scrolled { border-bottom-color: var(--line); }
.menu-btn {
  justify-self: start;
  width: 28px; height: 28px; padding: 0;
  background: none; border: 0; cursor: pointer;
  position: relative;
}
.menu-btn span {
  position: absolute; left: 2px; right: 2px; height: 1px; background: var(--ink);
  transition: transform .5s var(--ease), top .5s var(--ease);
}
.menu-btn span:nth-child(1) { top: 10px; }
.menu-btn span:nth-child(2) { top: 17px; }
body.menu-open .menu-btn span:nth-child(1) { top: 14px; transform: rotate(45deg); }
body.menu-open .menu-btn span:nth-child(2) { top: 14px; transform: rotate(-45deg); }

.logo { text-align: center; line-height: 1; }
.logo b {
  display: block;
  font-family: var(--latin); font-weight: 300;
  font-size: 17px; letter-spacing: .42em; margin-right: -.42em;
  text-transform: uppercase;
}
.logo small {
  display: block; margin-top: 7px;
  font-family: var(--latin); font-size: 8px; letter-spacing: .3em; margin-right: -.3em;
  color: var(--sub); text-transform: uppercase;
}
.header-right { justify-self: end; display: flex; gap: 28px; align-items: center; }
.header-right a { font-family: var(--latin); font-size: 10px; letter-spacing: .28em; }
.header-right .lang { color: var(--sub); }

/* ---------- Overlay menu ---------- */
.nav {
  position: fixed; inset: 0; z-index: 40;
  background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity .6s var(--ease), visibility .6s;
}
body.menu-open .nav { opacity: 1; visibility: visible; }
body.menu-open { overflow: hidden; }
.nav ul { list-style: none; margin: 0; padding: 0; text-align: center; }
.nav li { margin: 22px 0; opacity: 0; transform: translateY(8px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
body.menu-open .nav li { opacity: 1; transform: none; }
body.menu-open .nav li:nth-child(2) { transition-delay: .05s; }
body.menu-open .nav li:nth-child(3) { transition-delay: .1s; }
body.menu-open .nav li:nth-child(4) { transition-delay: .15s; }
body.menu-open .nav li:nth-child(5) { transition-delay: .2s; }
body.menu-open .nav li:nth-child(6) { transition-delay: .25s; }
.nav a { font-family: var(--latin); font-size: 13px; letter-spacing: .4em; margin-right: -.4em; }
.nav a small { display: block; font-family: var(--ja); font-size: 10px; letter-spacing: .15em; color: var(--sub); margin-top: 2px; }
.nav .nav-foot { position: absolute; bottom: 40px; display: flex; gap: 24px; }

/* underline hover */
.u { position: relative; }
.u::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -4px; height: 1px; background: currentColor;
  transform: scaleX(0); transform-origin: right; transition: transform .5s var(--ease);
}
.u:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- Layout ---------- */
main { padding-top: 72px; }
.wrap { padding: 0 var(--gutter); max-width: 1320px; margin: 0 auto; }
.narrow { max-width: 760px; margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(96px, 14vw, 180px) 0; }
.section + .section { padding-top: 0; }

/* ---------- Hero ---------- */
.hero { padding: 0 var(--gutter); }
.hero-frame {
  position: relative; overflow: hidden;
  height: calc(100svh - 72px - var(--gutter));
  min-height: 420px;
  background: var(--tint);
}
.hero-frame img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.04);
  transition: opacity 1.8s var(--ease), transform 7s linear;
}
.hero-frame img.on { opacity: 1; transform: scale(1); }
.hero-dots { position: absolute; right: 24px; bottom: 22px; display: flex; gap: 10px; z-index: 2; }
.hero-dots button { width: 18px; height: 1px; padding: 0; border: 0; background: rgba(30,30,30,.25); cursor: pointer; transition: background .4s, width .4s; }
.hero-dots button.on { background: var(--ink); width: 32px; }
.hero-caption { position: absolute; left: 28px; bottom: 18px; z-index: 2; font-family: var(--latin); font-size: 10px; letter-spacing: .3em; }

/* ---------- Statement ---------- */
.statement { text-align: center; }
.statement .label { display: block; margin-bottom: 40px; }
.statement h1 { font-size: clamp(15px, 1.8vw, 20px); letter-spacing: .18em; line-height: 2.4; }

/* ---------- Feature rows (reference-style) ---------- */
.rows { display: grid; gap: clamp(80px, 10vw, 140px); }
.row { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: var(--gutter); }
.row .media { overflow: hidden; background: var(--tint); }
.row .media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform 1.4s var(--ease); }
.row:hover .media img { transform: scale(1.03); }
.row .body { text-align: center; padding: 0 clamp(0px, 4vw, 64px); }
.row .body h2 { font-family: var(--latin); font-size: 11px; letter-spacing: .36em; margin-right: -.36em; text-transform: uppercase; }
.row .body p { margin-top: 24px; color: var(--sub); font-size: 12px; }
.row .body .more { display: inline-block; margin-top: 28px; font-family: var(--latin); font-size: 9px; letter-spacing: .3em; }
.row.reverse .media { order: 2; }

/* ---------- Page head ---------- */
.page-head { text-align: center; padding: clamp(80px, 12vw, 150px) var(--gutter) clamp(56px, 8vw, 100px); }
.page-head h1 { font-family: var(--latin); font-size: clamp(18px, 2vw, 22px); letter-spacing: .45em; margin-right: -.45em; text-transform: uppercase; }
.page-head p { margin-top: 22px; color: var(--sub); font-size: 12px; }

/* ---------- Projects grid ---------- */
.filters { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px 32px; margin-bottom: clamp(48px, 6vw, 80px); }
.filters button {
  background: none; border: 0; padding: 4px 0; cursor: pointer;
  font-family: var(--latin); font-size: 10px; letter-spacing: .3em; color: var(--sub);
}
.filters button.on { color: var(--ink); }
.filters button.on::after { transform: scaleX(1); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(40px, 5vw, 72px) clamp(20px, 3vw, 40px); }
.card { display: block; }
.card .media { overflow: hidden; background: var(--tint); }
.card img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; transition: transform 1.4s var(--ease), opacity .6s; }
.card:hover img { transform: scale(1.04); }
.card .meta { margin-top: 18px; display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.card h3 { font-size: 12px; letter-spacing: .1em; line-height: 1.8; }
.card .cat { flex-shrink: 0; font-family: var(--latin); font-size: 9px; letter-spacing: .25em; color: var(--sub); }
.card.hide { display: none; }
.center-link { text-align: center; margin-top: clamp(56px, 7vw, 96px); }
.center-link a { font-family: var(--latin); font-size: 10px; letter-spacing: .35em; }

/* ---------- Project detail ---------- */
.detail-hero { max-width: 1100px; margin: 0 auto; padding: 0 var(--gutter); }
.detail-hero img { width: 100%; background: var(--tint); }
.detail { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(40px, 7vw, 120px); max-width: 1100px; margin: clamp(64px, 8vw, 110px) auto 0; padding: 0 var(--gutter); }
.detail h1 { font-size: clamp(16px, 1.7vw, 20px); letter-spacing: .14em; line-height: 1.9; margin-bottom: 36px; }
.detail .text p + p { margin-top: 1.2em; }
.outline .label { display: block; margin-bottom: 20px; color: var(--ink); }
dl.spec { margin: 0; border-top: 1px solid var(--line); }
dl.spec div { display: grid; grid-template-columns: 96px 1fr; padding: 16px 0; border-bottom: 1px solid var(--line); }
dl.spec dt { font-family: var(--latin); font-size: 9px; letter-spacing: .28em; text-transform: uppercase; color: var(--sub); padding-top: 3px; }
dl.spec dd { margin: 0; font-size: 12px; line-height: 1.9; }
.pager { display: flex; justify-content: space-between; max-width: 1100px; margin: clamp(80px, 10vw, 140px) auto 0; padding: 32px var(--gutter) 0; border-top: 1px solid var(--line); font-family: var(--latin); font-size: 10px; letter-spacing: .28em; }

/* ---------- About ---------- */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 7vw, 120px); align-items: start; }
.about-intro .media { background: var(--tint); }
.about-intro img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.h-sub { display: flex; align-items: baseline; gap: 18px; margin-bottom: 36px; }
.h-sub h2 { font-family: var(--latin); font-size: 12px; letter-spacing: .36em; text-transform: uppercase; }
.h-sub span { font-size: 11px; color: var(--sub); letter-spacing: .1em; }
dl.spec.wide div { grid-template-columns: 150px 1fr; }
dl.spec.wide dt { font-family: var(--ja); font-size: 11px; letter-spacing: .1em; text-transform: none; padding-top: 0; }
.subcompany { display: grid; gap: 2px; }
.subcompany span { color: var(--sub); }

.timeline { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.timeline li { display: grid; grid-template-columns: 140px 1fr; padding: 22px 0; border-bottom: 1px solid var(--line); }
.timeline .year { font-family: var(--latin); font-size: 13px; letter-spacing: .2em; }
.ext { display: inline-block; margin-top: 40px; font-size: 12px; }
.ext .latin { font-size: 10px; }

.member { display: grid; grid-template-columns: 240px 1fr; gap: clamp(32px, 6vw, 96px); }
.member .name { font-size: 17px; letter-spacing: .2em; }
.member .role { display: block; margin-top: 10px; font-family: var(--latin); font-size: 10px; letter-spacing: .28em; color: var(--sub); }
.member p { color: var(--ink); }

/* ---------- Services ---------- */
.svc { display: grid; gap: clamp(80px, 10vw, 140px); }
.svc .row .body { text-align: left; }
.svc .num { font-family: var(--latin); font-size: 10px; letter-spacing: .3em; color: var(--sub); }
.svc h2 { margin-top: 14px; font-size: 17px; letter-spacing: .24em; font-family: var(--ja); text-transform: none; }
.svc .row .body p { color: var(--ink); font-size: 13px; }
.types { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(16px, 2vw, 28px); }
.type { position: relative; overflow: hidden; display: block; background: var(--tint); }
.type img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; transition: transform 1.4s var(--ease); }
.type:hover img { transform: scale(1.04); }
.type-label { display: block; margin-top: 16px; text-align: center; font-family: var(--latin); font-size: 10px; letter-spacing: .32em; }
.type-wrap { display: block; }

/* ---------- Contact ---------- */
.form { display: grid; gap: 34px; }
.field label { display: block; margin-bottom: 8px; font-size: 11px; letter-spacing: .12em; }
.field label em { font-style: normal; color: var(--sub); font-family: var(--latin); font-size: 9px; letter-spacing: .2em; margin-left: 8px; }
.field input, .field textarea, .field select {
  width: 100%; border: 0; border-bottom: 1px solid #cfccc6; border-radius: 0;
  background: transparent; padding: 10px 0; font: inherit; font-size: 14px; color: var(--ink);
  outline: none; transition: border-color .4s;
  -webkit-appearance: none; appearance: none;
}
.field input:focus, .field textarea:focus, .field select:focus { border-bottom-color: var(--ink); }
.field textarea { min-height: 160px; resize: vertical; }
.radios { display: flex; gap: 32px; flex-wrap: wrap; padding-top: 6px; }
.radios label { display: flex; align-items: center; gap: 10px; margin: 0; cursor: pointer; font-size: 13px; }
.radios input { width: 13px; height: 13px; padding: 0; border: 1px solid var(--ink); border-radius: 50%; }
.radios input:checked { background: radial-gradient(circle, var(--ink) 0 3px, transparent 3.5px); }
.btn {
  justify-self: center; margin-top: 16px;
  min-width: 240px; padding: 18px 40px;
  background: var(--ink); color: #fff; border: 1px solid var(--ink); cursor: pointer;
  font-family: var(--latin); font-size: 10px; letter-spacing: .4em;
  transition: background .4s, color .4s;
}
.btn:hover { background: transparent; color: var(--ink); }
.form-note { text-align: center; color: var(--sub); font-size: 12px; min-height: 2em; }

/* ---------- Footer ---------- */
.footer { margin-top: clamp(120px, 14vw, 200px); border-top: 1px solid var(--line); padding: clamp(64px, 8vw, 96px) var(--gutter) 40px; }
.footer-in { max-width: 1320px; margin: 0 auto; display: grid; grid-template-columns: 1.2fr 1fr 1fr .8fr; gap: 40px; }
.footer .logo { text-align: left; }
.footer .logo b { margin-right: 0; }
.footer h4 { margin: 0 0 18px; font-family: var(--latin); font-weight: 400; font-size: 10px; letter-spacing: .3em; color: var(--sub); }
.footer address { font-style: normal; font-size: 11px; line-height: 2; }
.footer address strong { display: block; font-weight: 400; font-size: 12px; margin-bottom: 4px; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.footer ul a { font-family: var(--latin); font-size: 10px; letter-spacing: .28em; }
.copy { max-width: 1320px; margin: 72px auto 0; display: flex; justify-content: space-between; font-family: var(--latin); font-size: 9px; letter-spacing: .25em; color: var(--sub); }

/* ---------- Reveal ---------- */
.rv { opacity: 0; transform: translateY(24px); transition: opacity 1.2s var(--ease), transform 1.2s var(--ease); }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  .hero-frame img { transition: opacity .3s; transform: none !important; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .types { grid-template-columns: repeat(2, 1fr); }
  .footer-in { grid-template-columns: 1fr 1fr; }
  .detail { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  body { font-size: 13px; }
  .header { height: 60px; }
  main { padding-top: 60px; }
  .header-right .lang { display: none; }
  .logo b { font-size: 14px; }
  .logo small { font-size: 7px; }
  .hero-frame { height: 72svh; min-height: 360px; }
  .row, .about-intro, .member { grid-template-columns: 1fr; }
  .row.reverse .media { order: 0; }
  .row .body { padding: 0; }
  .svc .row .body { text-align: left; }
  .grid { grid-template-columns: 1fr; }
  .footer-in { grid-template-columns: 1fr; }
  .copy { flex-direction: column; gap: 8px; }
  dl.spec.wide div { grid-template-columns: 1fr; gap: 2px; }
  .timeline li { grid-template-columns: 80px 1fr; }
  .statement h1 br.pc { display: none; }
}

.member { grid-template-columns: 280px 1fr; align-items: end; }
.portrait { background: var(--tint); margin-bottom: 24px; }
.portrait img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.member .bio { padding-bottom: 6px; }
@media (max-width: 680px) { .member { grid-template-columns: 1fr; } .portrait { max-width: 260px; } }
@media (max-width: 680px) {
  .hero-caption { display: none; }
  .header .logo small { display: none; }
  .header-right a { letter-spacing: .2em; font-size: 9px; }
}
.nav .nav-foot a, .nav .nav-foot span { font-family: var(--latin); font-size: 10px; letter-spacing: .3em; margin: 0; }

/* ---------- English ---------- */
html[lang="en"] body { font-family: var(--latin); font-size: 14px; line-height: 1.9; letter-spacing: .02em; }
html[lang="en"] .statement h1 { font-size: clamp(16px, 1.9vw, 22px); letter-spacing: .06em; line-height: 1.9; }
html[lang="en"] .svc h2 { font-family: var(--latin); letter-spacing: .12em; }
html[lang="en"] dl.spec.wide dt { font-family: var(--latin); font-size: 10px; letter-spacing: .2em; text-transform: uppercase; padding-top: 3px; }
html[lang="en"] .detail h1 { letter-spacing: .06em; }
html[lang="en"] .card h3 { font-size: 13px; letter-spacing: .04em; }
html[lang="en"] .field label { font-size: 12px; }