:root{
  --paper:#E5E5E2;
  --paper-deep:#DBDBD7;
  --ink:#1B1B18;
  --ink-soft:#5C5C5A;
  --ink-faint:#8B887C;
  --line:#C9C4B6;
  --seal:#A6321F;
  --navy:#243449;
  --mono: 'JetBrains Mono', monospace;
  --mincho: 'Shippori Mincho', serif;
  --sans: 'Noto Sans JP', sans-serif;
  --serif-jp: 'Noto Serif JP', serif;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:300;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(27,27,24,0.06) 1px, transparent 0);
  background-size: 28px 28px;
}
a{color:inherit; text-decoration:none;}
.wrap{max-width:1040px; margin:0 auto; padding:0 32px;}
.eyebrow{
  font-family:var(--mono);
  font-size:14px;
  letter-spacing:0.22em;
  color:var(--seal);
  text-transform:uppercase;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:16px; height:1px;
  background:var(--seal);
  display:inline-block;
}
h1,h2,h3{font-family:var(--mincho); font-weight:700; color:var(--ink);}

/* ===== NAV ===== */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(207,207,201,0.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
nav.wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{line-height:1.2;}
.brand-sub{
  display:block;
  font-family:var(--serif-jp); font-weight:400; font-size:11px;
  letter-spacing:0.11em; color:var(--ink-faint);
}
.brand-main{
  display:block;
  font-family:var(--serif-jp); font-weight:500; font-size:27px;
  letter-spacing:0.14em; color:var(--ink);
  margin-top:5px;
}
.navlinks{display:flex; gap:36px; font-size:15px; letter-spacing:0.02em;}
.navlinks a{position:relative; padding:4px 0; color:var(--ink-soft);}
.navlinks a:hover{color:var(--ink);}
.navlinks a::after{
  content:""; position:absolute; left:0; bottom:0; height:1px; width:0;
  background:var(--seal); transition:width .25s ease;
}
.navlinks a:hover::after{width:100%;}
.navtoggle{display:none; background:none; border:none; cursor:pointer;}
.navtoggle span{display:block; width:22px; height:1px; background:var(--ink); margin:5px 0;}

/* ===== HERO ===== */
.hero{padding:110px 0 90px; position:relative;}
.hero .eyebrow{margin-bottom:16px;}
.hero-heading-row{
  display:flex;
  align-items:center;
  justify-content:flex-start;
  gap:32px;
  margin-bottom:40px;
}
.hero h1{
  font-size:clamp(40px, 6vw, 64px);
  line-height:1.35;
  max-width:11ch;
}
.hero p.lead{
  max-width:620px;
  font-size:17px;
  color:var(--ink-soft);
  margin-bottom:56px;
}
.hero-art{
  width:340px;
  max-width:36vw;
  flex-shrink:0;
  mix-blend-mode:multiply;
  opacity:0.9;
  pointer-events:none;
  user-select:none;
}
@media (max-width:900px){
  .hero-heading-row{flex-direction:column; align-items:flex-start; gap:24px;}
  .hero-art{display:none;}
}

/* Ledger strip */
.ledger{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.ledger div{
  padding:24px 20px;
  border-left:1px solid var(--line);
}
.ledger div:first-child{border-left:none;}

.loc-card-link{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:13px; color:var(--seal);
  letter-spacing:0.03em;
}

/* Lightbox */
.lightbox{
  display:none;
  position:fixed; inset:0; z-index:200;
  align-items:center; justify-content:center;
  background:rgba(27,27,24,0.88);
  padding:48px;
  cursor:zoom-out;
}
.lightbox.open{display:flex;}
.lightbox img{
  max-width:90vw; max-height:90vh;
  object-fit:contain;
  border:1px solid var(--line);
}
.ledger .k{
  font-family:var(--mono); font-size:13px; color:var(--ink-faint);
  letter-spacing:0.06em; margin-bottom:12px;
}
.ledger .v{
  font-family:var(--mono); font-size:24px; font-weight:600; color:var(--ink);
  letter-spacing:0.01em;
}
.ledger .v.v-list{
  font-family:var(--sans); font-size:14.5px; font-weight:500;
  line-height:1.8; letter-spacing:0;
}

/* ===== SECTIONS GENERIC ===== */
section{padding:96px 0; border-bottom:1px solid var(--line);}
section h2{font-size:34px; margin:18px 0 44px;}
.section-head{max-width:640px;}

/* PROFILE */
.profile-grid{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:64px;
  align-items:start;
}
.profile-grid p{color:var(--ink-soft); font-size:17px; margin-bottom:22px;}
.profile-name{
  font-family:var(--mincho); font-size:22px; font-weight:600;
  margin-bottom:5px;
}
.profile-role{
  font-family:var(--mono); font-size:13px; color:var(--ink-faint);
  letter-spacing:0.08em; margin-bottom:28px;
}
.stat-rows{border-top:1px solid var(--line);}
.stat-row{
  display:flex; justify-content:space-between; align-items:baseline;
  padding:20px 0; border-bottom:1px solid var(--line);
}
.stat-row .label{font-size:14px; color:var(--ink-soft);}
.stat-row .num{font-family:var(--mono); font-size:22px; font-weight:600;}

/* SERVICES */
.service-list{border-top:1px solid var(--line);}
.service-item{
  display:grid;
  grid-template-columns:32px 1fr;
  gap:22px;
  padding:30px 0;
  border-bottom:1px solid var(--line);
}
.service-item .num{
  font-family:var(--mono); font-size:13px; font-weight:400;
  color:var(--ink-faint); letter-spacing:0.02em;
  margin-top:4px;
}
.service-item h3{
  font-family:var(--sans); font-weight:700; font-size:24px;
  margin-bottom:8px; color:var(--ink);
}
.service-item p{font-size:17px; color:var(--ink-soft);}

/* CASE STUDIES — empty state */
.empty-state{
  border:1px dashed var(--line);
  padding:64px 40px;
  text-align:center;
}
.empty-state p.msg{
  font-family:var(--mono); font-size:13px; color:var(--ink-faint);
  letter-spacing:0.03em; line-height:2;
}

/* CASE STUDIES — teaser (index.html) */
.cases-teaser{border-top:1px solid var(--line); padding-top:32px;}
.cases-teaser p{color:var(--ink-soft); font-size:17px; margin-bottom:20px;}

/* CASE STUDIES — case card */
.case-card{border:1px solid var(--line);}
.case-card + .case-card{margin-top:32px;}
.case-card-head{padding:34px 32px 26px;}
.case-card-tag{
  font-family:var(--mono); font-size:13px; color:var(--ink-faint);
  letter-spacing:0.06em; margin-bottom:10px;
}
.case-card-head h3{font-size:21px; margin-bottom:14px;}
.case-card-head p.desc{font-size:16px; color:var(--ink-soft);}
.case-gallery{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(150px,1fr));
  gap:2px;
  border-top:1px solid var(--line);
}
.case-gallery img{
  display:block; width:100%; aspect-ratio:4/3; object-fit:cover;
  cursor:zoom-in;
  transition:opacity .2s ease;
}
.case-gallery img:hover{opacity:0.85;}
@media (max-width:760px){
  .case-gallery{grid-template-columns:repeat(auto-fill, minmax(110px,1fr));}
}

/* PAGE HEADER (subpages such as cases.html) */
.page-head{padding:64px 0 0;}
.page-head .back-link{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:13px; color:var(--ink-faint);
  letter-spacing:0.03em; margin-bottom:28px;
}
.page-head .back-link:hover{color:var(--seal);}
.page-head p.lead{color:var(--ink-soft); font-size:17px; max-width:640px; margin-top:16px;}

/* COMPANY OVERVIEW */
.overview-table{width:100%; border-top:1px solid var(--line);}
.overview-table tr{border-bottom:1px solid var(--line);}
.overview-table th, .overview-table td{
  text-align:left; padding:20px 0; font-weight:400; font-size:16px;
  vertical-align:top;
}
.overview-table th{
  width:180px; font-family:var(--mono); font-size:13px;
  color:var(--ink-faint); letter-spacing:0.06em; font-weight:400;
}
.overview-table td{color:var(--ink-soft);}

/* CONTACT */
.contact-box{
  display:flex; justify-content:space-between; align-items:flex-end;
  flex-wrap:wrap; gap:30px;
}
.contact-box p{color:var(--ink-soft); max-width:420px; font-size:17px;}
.contact-tagline{
  font-family:var(--mincho); font-weight:600; font-size:23px;
  color:var(--ink); max-width:460px; margin-bottom:16px;
}
.cta{
  display:inline-flex; align-items:center; gap:14px;
  font-family:var(--mono); font-size:14px; letter-spacing:0.05em;
  border:1px solid var(--ink); padding:16px 26px;
  color:var(--ink); transition:.2s ease;
}
.cta:hover{background:var(--ink); color:var(--paper);}

footer{padding:34px 0; font-family:var(--mono); font-size:12px; color:var(--ink-faint); letter-spacing:0.04em;}
footer .wrap{display:flex; justify-content:space-between;}

[data-reveal]{opacity:0; transform:translateY(14px); transition:opacity .7s ease, transform .7s ease;}
[data-reveal].in{opacity:1; transform:translateY(0);}

@media (max-width:760px){
  .navlinks{
    position:fixed; top:76px; left:0; right:0;
    background:var(--paper); flex-direction:column; gap:0;
    border-bottom:1px solid var(--line);
    max-height:0; overflow:hidden; transition:max-height .3s ease;
  }
  .navlinks.open{max-height:400px;}
  .navlinks a{padding:16px 32px; width:100%; border-bottom:1px solid var(--line);}
  .navtoggle{display:block;}
  .profile-grid{grid-template-columns:1fr; gap:36px;}
  .ledger{grid-template-columns:1fr; }
  .ledger div{border-left:none; border-top:1px solid var(--line);}
  .ledger div:first-child{border-top:none;}
  .overview-table th{width:110px;}
  .brand-main{font-size:21px;}
  section h2{font-size:27px;}
  .service-item h3{font-size:20px;}
  .case-card-head h3{font-size:19px;}
  .contact-tagline{font-size:20px;}
}