/* =========================================================
   Anshin Sumai: design system
   Ink navy + brass + pine on warm paper. Fraunces / Inter.
   ========================================================= */

:root{
  --ink:        #101826;
  --ink-2:      #1b2740;
  --ink-soft:   #2c3a58;
  --paper:      #ffffff;
  --paper-2:    #f5f2e9;
  --paper-3:    #ffffff;
  --brass:      #b4863a;
  --brass-deep: #8c6526;
  --brass-tint: #f0e2c3;
  --pine:       #34493e;
  --pine-tint:  #e4ebe4;
  --navy-tint:  #e9ebf2;
  --slate:      #47506a;
  --slate-soft: #6b7288;
  --line:       rgba(16,24,38,.13);
  --line-soft:  rgba(16,24,38,.08);
  --line-on-ink:rgba(16,24,38,.13);

  --serif: "Fraunces", "Noto Serif JP", Georgia, serif;
  --sans:  "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --maxw: 1180px;
  --radius: 3px;
  --dur: .28s;
  --ease: cubic-bezier(.4,0,.2,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth; background:var(--paper);}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:.01ms !important; animation-iteration-count:1 !important; transition-duration:.01ms !important;}
}

body{
  margin:0;
  background:var(--paper);
  color:var(--slate);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%; display:block;}
a{color:inherit;}
h1,h2,h3,h4{
  font-family:var(--serif);
  color:var(--ink);
  margin:0 0 .5em;
  font-weight:600;
  letter-spacing:-.01em;
}
h1{font-size:clamp(2.4rem,4.6vw,3.7rem); line-height:1.06; font-weight:560;}
h2{font-size:clamp(1.7rem,3vw,2.5rem); line-height:1.15;}
h3{font-size:1.32rem; line-height:1.3;}
p{margin:0 0 1em;}
.lede{font-size:1.18rem; color:var(--ink-soft); line-height:1.55;}

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, [tabindex]:focus-visible{
  outline:2px solid var(--brass);
  outline-offset:3px;
}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px;}
.narrow{max-width:760px;}
.narrow ul{margin:0 0 1em; padding-left:1.3em;}
/* Same reading width as .narrow, but left-aligned within an already-centered
   .wrap instead of being independently re-centered. Used for long
   single-column pages (privacy, disclosure) so the body copy's left edge
   lines up with the hero/breadcrumb above it instead of stepping inward. */
.legal-copy{margin:0;}
.legal-copy ul{margin:0 0 1em; padding-left:1.3em;}
.legal-copy h2{margin-top:38px;}
.legal-copy h2:first-child{margin-top:0;}
.legal-copy .service-row{grid-template-columns:200px 1fr; gap:28px; padding:18px 0;}
.legal-section{padding:36px 0 80px;}
@media (max-width:600px){
  .legal-copy .service-row{grid-template-columns:1fr; gap:6px;}
}
.narrow li{margin-bottom:.5em; line-height:1.6;}
.narrow li::marker{color:var(--brass);}
.narrow h2{margin-top:2.2em; font-size:1.4rem;}
.narrow h2:first-of-type{margin-top:0;}

section{padding:88px 0;}
@media (max-width:700px){ section{padding:60px 0;} }

.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-size:.82rem; color:var(--brass-deep); font-weight:600;
  margin-bottom:14px;
}
.eyebrow::before{content:""; width:20px; height:1px; background:var(--brass);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 26px;
  font-family:var(--sans); font-size:.98rem; font-weight:600;
  border-radius:var(--radius);
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition:background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn-primary{background:var(--brass); color:var(--paper-3);}
.btn-primary:hover{background:var(--brass-deep);}
.btn-ghost-dark{border-color:var(--ink); color:var(--ink);}
.btn-ghost-dark:hover{background:var(--ink); color:var(--paper);}
.btn-ghost{border-color:var(--line); color:var(--ink);}
.btn-ghost:hover{background:var(--paper-2);}
.btn-pine{background:var(--pine); color:var(--paper-3);}
.btn-pine:hover{background:#243329;}

/* ---------- language switch ---------- */
.lang-switch{
  display:flex; align-items:center; gap:2px;
  border:1px solid var(--line); border-radius:20px; padding:3px;
  margin-left:6px;
}
.lang-switch button{
  background:none; border:none; cursor:pointer;
  font-family:var(--sans); font-size:.76rem; font-weight:600;
  padding:6px 12px; border-radius:16px; color:var(--slate-soft);
  transition:background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.lang-switch button.active{background:var(--brass); color:#fff;}
/* Belt-and-suspenders: if a synchronous pre-paint script has already detected
   a stored Japanese preference (html[data-lang="ja"]), force the correct
   button to look active immediately, before main.js runs, so the toggle
   never visibly flips from EN to JA on load. */
html[data-lang="ja"] .lang-switch button[data-lang="en"]{background:none; color:var(--slate-soft);}
html[data-lang="ja"] .lang-switch button[data-lang="ja"]{background:var(--brass); color:#fff;}
@media (max-width:1240px){
  .lang-switch{margin:18px 6px 0;}
}

/* ---------- header ---------- */
header.site{
  position:sticky; top:0; z-index:60;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.nav-row{
  max-width:var(--maxw); margin:0 auto; padding:0 28px;
  display:flex; align-items:center; justify-content:space-between;
  height:74px;
}
.brand{display:flex; align-items:center; gap:11px; text-decoration:none;}
.brand-mark{width:34px; height:34px; flex:none;}
.brand-word{font-family:var(--serif); font-weight:600; font-size:1.2rem; color:var(--ink); line-height:1;}
.brand-word small{display:block; font-family:var(--sans); font-weight:500; font-size:.62rem; letter-spacing:.06em; color:var(--slate-soft); margin-top:3px;}

nav.primary{display:flex; align-items:center; gap:2px;}
nav.primary > a, .nav-drop > button{
  font-size:.93rem; font-weight:500; color:var(--ink-soft);
  padding:10px 15px; text-decoration:none; border-radius:var(--radius);
  background:none; border:none; font-family:var(--sans); cursor:pointer;
  display:flex; align-items:center; gap:5px;
}
nav.primary > a:hover, .nav-drop > button:hover{color:var(--ink);}
nav.primary > a.active{color:var(--ink); font-weight:600;}
.nav-drop{position:relative;}
.nav-drop.current > button{color:var(--ink); font-weight:600;}
.nav-drop svg{width:11px; height:11px; transition:transform var(--dur) var(--ease); flex:none;}
.nav-drop:hover svg, .nav-drop.open svg{transform:rotate(180deg);}
.nav-panel{
  position:absolute; top:calc(100% + 6px); left:0;
  background:var(--paper-3); border:1px solid var(--line);
  border-radius:var(--radius); min-width:240px;
  box-shadow:0 14px 30px rgba(16,24,38,.13);
  padding:8px; opacity:0; visibility:hidden; transform:translateY(4px);
  transition:opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.nav-drop:hover .nav-panel, .nav-drop.open .nav-panel{opacity:1; visibility:visible; transform:translateY(0);}
.nav-panel a{
  display:block; padding:10px 12px; border-radius:var(--radius);
  text-decoration:none; color:var(--ink-soft); font-size:.92rem;
}
.nav-panel a:hover{background:var(--paper-2); color:var(--ink);}
.nav-panel a span{display:block; font-size:.78rem; color:var(--slate-soft); margin-top:2px; font-weight:400;}
.nav-cta{margin-left:8px;}

.menu-toggle{display:none; position:relative; z-index:75; background:none; border:none; cursor:pointer; padding:8px;}
.menu-toggle span{display:block; width:22px; height:2px; background:var(--ink); margin:5px 0; transition:transform var(--dur) var(--ease), opacity var(--dur) var(--ease);}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

body.nav-open{overflow:hidden;}

@media (max-width:1240px){
  nav.primary{
    position:fixed; top:74px; left:0; right:0; bottom:0;
    background:var(--paper); z-index:65;
    flex-direction:column; align-items:stretch; padding:14px 22px;
    transform:translateX(100%); visibility:hidden; pointer-events:none;
    transition:transform var(--dur) var(--ease), visibility 0s linear var(--dur);
    overflow-y:auto;
    -webkit-overflow-scrolling:touch;
  }
  nav.primary.open{
    transform:translateX(0); visibility:visible; pointer-events:auto;
    transition:transform var(--dur) var(--ease), visibility 0s linear;
  }
  nav.primary > a, .nav-drop > button{width:100%; padding:16px 6px; border-bottom:1px solid var(--line-soft); justify-content:space-between; font-size:1.02rem;}
  .nav-panel{position:static; box-shadow:none; opacity:1; visibility:visible; transform:none; max-height:0; overflow:hidden; padding:0; border:none; transition:max-height var(--dur) var(--ease);}
  .nav-drop.open .nav-panel{max-height:260px; padding:4px 0 10px 12px;}
  .nav-cta{margin:20px 6px 0;}
  .menu-toggle{display:block;}
}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(180deg,var(--paper-2),var(--paper) 72%);
  color:var(--ink);
  padding:96px 0 84px;
  position:relative; overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-grid{display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center;}
@media (max-width:900px){ .hero-grid{grid-template-columns:1fr; gap:44px;} }
.hero h1{color:var(--ink);}
.hero .lede{color:var(--slate);}
.hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:30px;}
.hero-art{width:100%; height:auto;}

.page-hero{
  background:var(--paper-2); color:var(--ink);
  padding:78px 0 62px;
  border-bottom:1px solid var(--line);
}
.page-hero h1{color:var(--ink); max-width:820px;}
.page-hero .lede{color:var(--slate); max-width:640px;}
.crumb{font-size:.82rem; color:var(--slate-soft); margin-bottom:16px;}
.crumb a{color:var(--ink-soft); text-decoration:none;}
.crumb a:hover{color:var(--brass-deep);}

/* ---------- three-panel selector (fusuma doors) ---------- */
.doors{display:flex; min-height:400px; border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.door{
  flex:1; position:relative; overflow:hidden;
  display:flex; flex-direction:column; justify-content:flex-end;
  padding:34px 30px; text-decoration:none;
  transition:flex var(--dur) var(--ease);
  border-right:1px solid var(--line);
  border-top:4px solid transparent;
}
.doors:hover .door{flex:.85;}
.doors .door:hover{flex:1.35;}
.door:last-child{border-right:none;}
.door-1{background:var(--navy-tint); border-top-color:var(--ink-soft);}
.door-2{background:var(--brass-tint); border-top-color:var(--brass);}
.door-3{background:var(--pine-tint); border-top-color:var(--pine);}
.door-tag{font-size:.78rem; color:var(--slate-soft); font-weight:600; letter-spacing:.02em; margin-bottom:10px;}
.door h3{color:var(--ink); font-size:1.5rem; margin-bottom:10px;}
.door p{color:var(--slate); font-size:.94rem; max-width:280px; margin-bottom:0;}
.door-icon{position:absolute; top:26px; right:26px; width:38px; height:38px; opacity:.35;}
.door-icon svg{width:100%; height:100%;}
.door-more{display:inline-flex; align-items:center; gap:6px; margin-top:18px; font-size:.88rem; color:var(--brass-deep); font-weight:600;}
@media (max-width:800px){
  .doors{flex-direction:column; min-height:auto;}
  .doors .door, .doors:hover .door, .doors .door:hover{flex:none;}
  .door{border-right:none; border-bottom:1px solid var(--line); padding:30px 26px;}
  .door p{max-width:none;}
}

/* ---------- generic grids/cards ---------- */
.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:30px;}
.grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:30px;}
@media (max-width:860px){ .grid-3{grid-template-columns:1fr;} .grid-2{grid-template-columns:1fr;} }

.card{
  background:var(--paper-3); border:1px solid var(--line);
  border-radius:var(--radius); padding:30px;
}
.card h3{margin-bottom:12px;}
.card p:last-child{margin-bottom:0;}

.service-row{
  display:grid; grid-template-columns:220px 1fr; gap:36px;
  padding:34px 0; border-top:1px solid var(--line);
}
.service-row:last-child{border-bottom:1px solid var(--line);}
.service-row h3{margin-bottom:10px;}
@media (max-width:700px){ .service-row{grid-template-columns:1fr; gap:10px;} }

.tag-row{display:flex; flex-wrap:wrap; gap:9px; margin-top:16px;}
.tag{
  font-size:.8rem; padding:6px 12px; border:1px solid var(--line);
  border-radius:20px; color:var(--ink-soft);
}

/* section tone variants */
.tone-paper2{background:var(--paper-2);}
.tone-ink{background:var(--navy-tint); color:var(--ink); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.tone-ink h2, .tone-ink h3{color:var(--ink);}
.tone-ink p{color:var(--slate);}
.tone-pine{background:var(--pine-tint); color:var(--ink); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.tone-pine h2, .tone-pine h3{color:var(--ink);}
.tone-pine p{color:var(--slate);}

.split{display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center;}
@media (max-width:860px){ .split{grid-template-columns:1fr; gap:34px;} }

/* case studies */
.case{
  border:1px solid var(--line); border-radius:var(--radius);
  padding:34px; background:var(--paper-3);
  display:grid; grid-template-columns:1fr 1fr; gap:30px;
}
@media (max-width:800px){ .case{grid-template-columns:1fr;} }
.case-stat{display:flex; gap:22px; margin-top:18px; flex-wrap:wrap;}
.case-stat div strong{display:block; font-family:var(--serif); font-size:1.5rem; color:var(--ink);}
.case-stat div span{font-size:.78rem; color:var(--slate-soft);}

/* stats/proof strip */
.proof{display:flex; flex-wrap:wrap; gap:14px; margin-top:26px;}
.proof .tag{background:var(--paper-3);}

/* faq */
details.faq{border-top:1px solid var(--line); padding:20px 0;}
details.faq:last-child{border-bottom:1px solid var(--line);}
details.faq summary{
  cursor:pointer; font-family:var(--serif); font-size:1.12rem; color:var(--ink);
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  list-style:none;
}
details.faq summary::-webkit-details-marker{display:none;}
details.faq summary::after{content:"+"; font-size:1.4rem; color:var(--brass); flex:none;}
details.faq[open] summary::after{content:"–";}
details.faq p{margin-top:14px; color:var(--slate);}

/* property cards (real estate) */
.property{border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; background:var(--paper-3);}
.property-media{background:var(--pine-tint); aspect-ratio:4/3; display:flex; align-items:center; justify-content:center;}
.property-body{padding:22px;}
.property-price{font-family:var(--serif); font-size:1.3rem; color:var(--ink); margin-bottom:6px;}
.property-meta{display:flex; gap:14px; font-size:.83rem; color:var(--slate-soft); margin-top:10px;}

/* contact form */
.field{margin-bottom:18px;}
.field label{display:block; font-size:.88rem; font-weight:600; color:var(--ink-soft); margin-bottom:7px;}
.field input, .field select, .field textarea{
  width:100%; padding:12px 14px; border:1px solid var(--line); border-radius:var(--radius);
  font-family:var(--sans); font-size:.98rem; background:var(--paper-3); color:var(--ink);
}
.field textarea{resize:vertical; min-height:120px;}
.field input:focus, .field select:focus, .field textarea:focus{outline:2px solid var(--brass); outline-offset:1px; border-color:transparent;}

/* footer */
footer.site{background:var(--paper); color:var(--slate); padding:64px 0 30px; border-top:3px solid var(--brass);}
.foot-grid{display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; padding-bottom:44px; border-bottom:1px solid var(--line);}
@media (max-width:800px){ .foot-grid{grid-template-columns:1fr 1fr; row-gap:34px;} }
@media (max-width:520px){ .foot-grid{grid-template-columns:1fr;} }
.foot-grid h4{color:var(--ink); font-family:var(--sans); font-size:.85rem; font-weight:600; margin-bottom:14px;}
.foot-grid a{display:block; color:var(--slate); text-decoration:none; font-size:.92rem; margin-bottom:10px;}
.foot-grid a:hover{color:var(--brass-deep);}
.foot-bottom{display:flex; justify-content:space-between; align-items:center; padding-top:24px; font-size:.82rem; flex-wrap:wrap; gap:10px; color:var(--slate-soft);}
.foot-bottom a{color:var(--slate-soft); text-decoration:none;}
.foot-bottom a:hover{color:var(--brass-deep);}

.skip-link{
  position:absolute; left:-999px; top:0; background:var(--brass); color:var(--paper);
  padding:10px 16px; z-index:100;
}
.skip-link:focus{left:12px; top:12px;}