/* ───────── Tokens ───────── */
:root{
  --bg:        #0a0807;
  --bg-2:      #15100d;
  --bg-3:      #1d1611;
  --ink:       #ece4d3;
  --ink-dim:   #b6a994;
  --ink-mute:  #7d705e;
  --shu:       #b8302a;   /* 朱 ─ Itsukushima vermilion */
  --shu-deep:  #8a1f1c;
  --kin:       #c9a14a;   /* 金 */
  --kin-soft:  #d8b766;
  --rule:      rgba(201,161,74,.28);
  --rule-soft: rgba(236,228,211,.10);

  --serif-jp:  'Shippori Mincho B1','Noto Serif JP', "游明朝","Yu Mincho","Hiragino Mincho ProN", serif;
  --serif-jp-body: 'Noto Serif JP','Shippori Mincho B1', "游明朝","Yu Mincho", serif;
  --serif-en:  'Cormorant Garamond', 'Shippori Mincho B1', serif;

  --shadow-1: 0 30px 80px rgba(0,0,0,.55);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:var(--serif-jp-body);font-weight:400;line-height:1.85;-webkit-font-smoothing:antialiased;}
body{
  background:
    radial-gradient(ellipse at 80% -10%, rgba(184,48,42,.10), transparent 55%),
    radial-gradient(ellipse at -10% 90%, rgba(201,161,74,.05), transparent 50%),
    var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* Paper-grain noise overlay */
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:1;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.85  0 0 0 0 0.78  0 0 0 0 0.63  0 0 0 .06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity:.6; mix-blend-mode:overlay;
}

/* ───────── NAV ───────── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:30;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px 48px;
  background:linear-gradient(180deg, rgba(10,8,7,.78), rgba(10,8,7,0));
  backdrop-filter:blur(6px);
  transition:background .3s ease;
}
.nav.scrolled{ background:rgba(10,8,7,.92); border-bottom:1px solid var(--rule-soft); backdrop-filter:blur(12px); }
.nav .brand{display:flex;align-items:baseline;gap:18px}
.nav .brand .kanji{font-family:var(--serif-jp);font-size:22px;font-weight:600;letter-spacing:.18em;color:var(--kin-soft)}
.nav .brand .roman{font-family:var(--serif-en);font-size:13px;letter-spacing:.32em;text-transform:uppercase;color:var(--ink-dim)}
.nav ul{display:flex;gap:34px;list-style:none;margin:0;padding:0}
.nav ul a{font-family:var(--serif-jp);font-size:14px;letter-spacing:.22em;color:var(--ink-dim);position:relative;padding:6px 0}
.nav ul a:hover{color:var(--kin-soft)}
.nav ul a.active{color:var(--kin-soft)}
.nav ul a::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:1px;background:var(--shu);transition:.3s ease}
.nav ul a:hover::after, .nav ul a.active::after{width:100%;left:0}
.nav .cta{
  font-family:var(--serif-jp);font-size:13px;letter-spacing:.24em;
  color:var(--ink); padding:11px 22px;
  border:1px solid var(--kin); background:transparent;
  transition:.3s;
}
.nav .cta:hover{background:var(--shu);border-color:var(--shu);color:#fff}
@media (max-width:980px){
  .nav ul{display:none}
  .nav{padding:16px 22px}
}

/* ───────── Page header (sub-pages) ───────── */
.page-head{
  padding:160px 80px 90px;
  position:relative; z-index:2;
  border-bottom:1px solid var(--rule-soft);
  background:linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}
.page-head .num{
  font-family:var(--serif-en); font-size:12px; letter-spacing:.5em; color:var(--kin); text-transform:uppercase;
  margin-bottom:18px; display:flex; align-items:center; gap:14px;
}
.page-head .num::before{content:"";width:32px;height:1px;background:var(--kin)}
.page-head h1{
  font-family:var(--serif-jp); font-weight:600;
  font-size:clamp(46px, 5.4vw, 80px); letter-spacing:.08em; margin:0 0 16px; line-height:1.2;
}
.page-head .en{
  font-family:var(--serif-en); font-style:italic; font-size:20px; letter-spacing:.32em; color:var(--ink-mute);
}
.page-head .lead{
  max-width:680px; margin-top:32px; color:var(--ink-dim); font-size:17px; line-height:2;
}
@media (max-width:760px){ .page-head{padding:130px 24px 60px} }

/* ───────── Section frame ───────── */
section.block{ position:relative; padding:120px 80px; z-index:2; }
@media (max-width:980px){ section.block{ padding:80px 24px } }

.sec-head{ display:flex; align-items:baseline; gap:32px; margin-bottom:72px; }
.sec-head .num{
  font-family:var(--serif-en); font-size:14px; letter-spacing:.5em; color:var(--kin);
  padding-right:24px; border-right:1px solid var(--rule);
}
.sec-head h2{
  font-family:var(--serif-jp); font-weight:600;
  font-size:clamp(38px, 4.2vw, 60px); letter-spacing:.08em; margin:0; line-height:1.2;
}
.sec-head .en{
  font-family:var(--serif-en); font-style:italic; font-size:18px; letter-spacing:.28em;
  color:var(--ink-mute); margin-left:auto;
}
@media (max-width:760px){
  .sec-head{flex-wrap:wrap; gap:14px}
  .sec-head .en{display:none}
}

/* ───────── Footer ───────── */
footer{
  background:#070504; padding:80px 80px 40px; border-top:1px solid var(--rule); position:relative; z-index:2;
}
.foot-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap:60px; padding-bottom:60px; border-bottom:1px solid var(--rule-soft) }
.foot-brand .kanji{ font-family:var(--serif-jp); font-size:30px; letter-spacing:.18em; color:var(--kin-soft); margin-bottom:8px }
.foot-brand .roman{ font-family:var(--serif-en); font-size:13px; letter-spacing:.42em; text-transform:uppercase; color:var(--ink-dim); margin-bottom:22px }
.foot-brand p{ font-size:13px; color:var(--ink-mute); line-height:1.9; margin:0 }
.foot-col h5{ font-family:var(--serif-en); font-size:11px; letter-spacing:.42em; color:var(--kin); text-transform:uppercase; margin:0 0 18px }
.foot-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.foot-col a{ font-family:var(--serif-jp); font-size:14px; color:var(--ink-dim); letter-spacing:.12em }
.foot-col a:hover{color:var(--kin-soft)}
.foot-col p{font-size:13px; color:var(--ink-dim); margin:0; line-height:1.9; letter-spacing:.06em}
.copy{ display:flex; justify-content:space-between; align-items:center; padding-top:30px; font-family:var(--serif-en); font-size:11px; letter-spacing:.36em; color:var(--ink-mute); text-transform:uppercase }
@media (max-width:980px){ footer{padding:60px 24px 30px} .foot-grid{grid-template-columns:1fr; gap:40px} .copy{flex-direction:column;gap:14px; text-align:center} }

/* ───────── Reveal ───────── */
.reveal{opacity:0; transform:translateY(28px); transition: opacity .9s ease, transform .9s ease}
.reveal.in{opacity:1; transform:none}

/* ───────── Strip (used on home + about) ───────── */
.strip{ display:grid; grid-template-columns: repeat(4, 1fr); gap:2px; padding:0; background:#000; }
.strip img{ width:100%; height:280px; object-fit:cover; filter:grayscale(.15) saturate(.9); transition:.6s; }
.strip img:hover{ filter:grayscale(0) saturate(1.05); transform:scale(1.02); }
@media (max-width:760px){ .strip{grid-template-columns:repeat(2,1fr)} .strip img{height:200px} }