:root{
    --ink:#15181A;        /* warm near-black (body text) */
    --ink-soft:#2A2E30;
    --navy-dk:#131C2E;    /* navy near-black for dark sections */
    --paper:#EFEEE9;      /* cool concrete off-white */
    --paper-2:#E7E5DE;
    --stone:#B7B4AB;      /* concrete gray */
    --line:rgba(21,24,26,.14);
    --line-2:rgba(21,24,26,.08);
    --line-lt:rgba(239,238,233,.16);
    --pine:#1C2E52;       /* brand navy, tuned to luxury */
    --pine-lt:#6C8FC9;    /* light navy for italic accents */
    --petrol-dk:#0D1420;  /* deep navy near-black */
    --mut:#6B6E6B;
    --font-min:"Shippori Mincho",serif;
    --font-cor:"Cormorant Garamond",serif;
    --font-sans:"Zen Kaku Gothic New",system-ui,sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    font-family:var(--font-sans);
    background:var(--paper);
    color:var(--ink);
    font-weight:300;
    line-height:1.9;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
    overflow-x:hidden;
  }
  ::selection{background:var(--pine);color:var(--paper)}
  a{color:inherit;text-decoration:none}
  img{display:block;max-width:100%}

  /* ---- utilities ---- */
  /* 文節ラップ：狭幅（〜390px）での語中改行を防ぐ。見出し・リード・カード短文・会社情報に適用 */
  .nw{display:inline-block}
  .wrap{max-width:1240px;margin:0 auto;padding:0 40px}
  .eyebrow{
    font-family:var(--font-sans);font-weight:500;font-size:11px;
    letter-spacing:.34em;text-transform:uppercase;color:var(--mut);
    display:inline-flex;align-items:center;gap:14px;
  }
  .eyebrow::before{content:"";width:26px;height:1px;background:var(--pine);display:inline-block}
  .eyebrow.on-dark{color:rgba(239,238,233,.6)}
  .section{padding:130px 0;position:relative}

  /* ---- fine architectural grid signature ---- */
  .grid-lines{position:absolute;inset:0;pointer-events:none;z-index:0;
    background-image:linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
    background-size:calc(100% / 6) 100%;opacity:.9}
  .grid-lines.dk{background-image:linear-gradient(90deg,rgba(239,238,233,.05) 1px,transparent 1px)}

  /* =========== NAV =========== */
  header.nav{
    position:fixed;top:0;left:0;right:0;z-index:50;
    display:flex;align-items:center;justify-content:space-between;
    padding:22px 40px;transition:background .5s ease,padding .5s ease,border-color .5s ease;
    border-bottom:1px solid transparent;
  }
  header.nav.scrolled{
    background:rgba(239,238,233,.86);backdrop-filter:blur(14px);
    padding:15px 40px;border-bottom:1px solid var(--line);
  }
  .brand{display:flex;flex-direction:column;gap:4px}
  .brand .wordmark{
    font-family:var(--font-cor);font-weight:500;font-size:21px;
    letter-spacing:.5em;margin-right:-.5em;line-height:1;
    color:var(--ink);transition:color .5s;
  }
  .brand .sub{font-size:8.5px;letter-spacing:.44em;margin-right:-.44em;color:var(--mut);transition:color .5s}
  .brand svg{height:36px;width:auto;display:block;color:var(--paper);transition:color .5s}
  header.nav.scrolled .brand svg{color:var(--ink)}
  nav.menu{display:flex;align-items:center;gap:38px}
  nav.menu a{font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;position:relative;padding:4px 0;transition:color .5s}
  nav.menu a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--pine);transition:width .4s ease}
  nav.menu a:hover::after{width:100%}
  .nav-cta{
    font-size:11px;letter-spacing:.22em;text-transform:uppercase;padding:11px 24px;
    border:1px solid var(--line);border-radius:2px;transition:.4s;
  }
  .nav-cta:hover{background:var(--pine);color:var(--paper);border-color:var(--pine)}
  /* hero over dark: light nav initially */
  header.nav:not(.scrolled) .brand .wordmark,
  header.nav:not(.scrolled) nav.menu a{color:var(--paper)}
  header.nav:not(.scrolled) .brand .sub{color:rgba(239,238,233,.6)}
  header.nav:not(.scrolled) .nav-cta{border-color:var(--line-lt);color:var(--paper)}
  header.nav:not(.scrolled) .nav-cta:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
  .burger{display:none;font-size:11px;letter-spacing:.22em;text-transform:uppercase;
    padding:10px 18px;border:1px solid var(--line);border-radius:2px}
  header.nav:not(.scrolled) .burger{border-color:var(--line-lt);color:var(--paper)}

  /* =========== HERO =========== */
  .hero{position:relative;min-height:100svh;display:flex;align-items:flex-end;
    background:var(--navy-dk);color:var(--paper);overflow:hidden}
  .hero-bg{position:absolute;inset:0;z-index:0;
    background-image:linear-gradient(180deg,rgba(16,22,36,.4) 0%,rgba(17,24,40,.2) 42%,rgba(19,28,46,.88) 100%),url(../img/hero.webp);
    background-size:cover;background-position:center 30%;
    filter:contrast(1.03) brightness(.96);
    transform:scale(1.06);animation:heroZoom 18s ease-out forwards}
  @keyframes heroZoom{to{transform:scale(1)}}
  .hero-grid{position:absolute;inset:0;z-index:1;pointer-events:none;
    background-image:linear-gradient(90deg,rgba(239,238,233,.07) 1px,transparent 1px);
    background-size:calc(100% / 6) 100%}
  .hero-loc{position:absolute;top:150px;right:40px;z-index:2;text-align:right;
    font-size:11px;letter-spacing:.28em;color:rgba(239,238,233,.72);line-height:2.2}
  .hero-loc .jp{font-size:12.5px;letter-spacing:.16em;color:var(--paper)}
  .hero-inner{position:relative;z-index:2;width:100%;padding-bottom:88px}
  .hero h1{
    font-family:var(--font-min);font-weight:500;
    font-size:clamp(2.9rem,8.2vw,7.2rem);line-height:1.06;letter-spacing:.02em;
    text-shadow:0 2px 40px rgba(0,0,0,.35)}
  .hero h1 .l{display:block;overflow:hidden}
  .hero h1 .l>span{display:block;transform:translateY(112%);
    animation:rise 1s cubic-bezier(.19,1,.22,1) forwards}
  .hero h1 .l:nth-child(2)>span{animation-delay:.13s}
  @keyframes rise{to{transform:translateY(0)}}
  .hero .en{font-family:var(--font-cor);font-style:italic;font-weight:300;
    font-size:clamp(1.15rem,2.4vw,1.9rem);color:rgba(239,238,233,.85);
    margin-top:28px;letter-spacing:.06em;opacity:0;animation:fade 1.1s ease .5s forwards}
  .hero-foot{display:flex;justify-content:flex-end;align-items:flex-end;
    margin-top:46px;gap:40px;flex-wrap:wrap;opacity:0;animation:fade 1.1s ease .7s forwards}
  .scrollcue{display:flex;align-items:center;gap:12px;font-size:10px;letter-spacing:.3em;
    text-transform:uppercase;color:rgba(239,238,233,.6)}
  .scrollcue .bar{width:1px;height:52px;background:linear-gradient(rgba(239,238,233,.6),transparent);
    position:relative;overflow:hidden}
  .scrollcue .bar::after{content:"";position:absolute;top:-52px;left:0;width:1px;height:52px;
    background:var(--paper);animation:cue 2.4s ease-in-out infinite}
  @keyframes cue{0%{top:-52px}60%,100%{top:52px}}
  @keyframes fade{to{opacity:1}}

  /* =========== STATEMENT =========== */
  .statement{background:var(--paper)}
  .statement .wrap{position:relative;z-index:1}
  .statement .lead{font-family:var(--font-min);font-weight:400;
    font-size:clamp(1.5rem,3.4vw,2.7rem);line-height:1.85;letter-spacing:.02em;
    max-width:22em}
  .statement .lead em{font-style:normal;color:var(--pine)}
  .statement .cols{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin-top:66px;
    max-width:820px;margin-left:auto}
  .statement .cols p{font-size:14.5px;line-height:2.2;color:#3a3d3c}
  .statement .cols h4{font-family:var(--font-cor);font-size:15px;letter-spacing:.1em;
    color:var(--pine);margin-bottom:16px;font-weight:500}

  /* =========== SERVICES =========== */
  .services{background:var(--navy-dk);color:var(--paper)}
  .services .head{display:flex;justify-content:space-between;align-items:flex-end;
    gap:40px;flex-wrap:wrap;margin-bottom:20px;position:relative;z-index:1}
  .services h2,.works h2,.about h2,.contact h2{
    font-family:var(--font-min);font-weight:500;
    font-size:clamp(1.9rem,4vw,3.1rem);line-height:1.3;letter-spacing:.03em}
  .services h2 .en{display:block;font-family:var(--font-cor);font-style:italic;
    font-weight:300;font-size:.5em;color:var(--pine-lt);letter-spacing:.04em;margin-bottom:8px}
  .srv-list{position:relative;z-index:1;margin-top:34px;border-top:1px solid var(--line-lt)}
  .srv{display:grid;grid-template-columns:88px 1fr 1.3fr auto;gap:34px;align-items:center;
    padding:36px 8px;border-bottom:1px solid var(--line-lt);transition:.5s;position:relative}
  .srv .idx{font-family:var(--font-cor);font-size:14px;color:rgba(239,238,233,.4);letter-spacing:.1em}
  .srv .ttl{font-family:var(--font-min);font-size:clamp(1.25rem,2.4vw,1.7rem);font-weight:500}
  .srv .ttl small{display:block;font-family:var(--font-cor);font-style:italic;font-size:.62em;
    color:var(--pine-lt);letter-spacing:.06em;margin-top:6px;font-weight:400}
  .srv .desc{font-size:13.5px;line-height:2;color:rgba(239,238,233,.66)}
  .srv .arw{width:44px;height:44px;border:1px solid var(--line-lt);border-radius:50%;
    display:grid;place-items:center;transition:.5s;color:rgba(239,238,233,.6)}
  .srv:hover{background:linear-gradient(90deg,rgba(28,46,82,.3),transparent);padding-left:24px}
  .srv:hover .arw{background:var(--pine);border-color:var(--pine);color:var(--paper);transform:rotate(-45deg)}

  /* =========== PROCESS (true sequence) =========== */
  .process{background:var(--paper-2)}
  .process .wrap{position:relative;z-index:1}
  .proc-head{max-width:640px;margin-bottom:60px}
  .proc-head h3{font-family:var(--font-min);font-weight:500;
    font-size:clamp(1.6rem,3vw,2.3rem);line-height:1.45;margin-top:22px;letter-spacing:.02em}
  .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line)}
  .step{padding:34px 22px 40px;border-right:1px solid var(--line);position:relative}
  .step:last-child{border-right:none}
  .step .n{font-family:var(--font-cor);font-size:2.6rem;font-weight:300;color:var(--pine);line-height:1}
  .step .n sup{font-size:.9rem;color:var(--stone);margin-left:2px}
  .step h5{font-family:var(--font-min);font-size:1.05rem;font-weight:500;margin:20px 0 10px}
  .step p{font-size:12.5px;line-height:1.95;color:#54574f}
  .step::before{content:"";position:absolute;top:-1px;left:0;width:0;height:2px;background:var(--pine);transition:width .8s ease}
  .step.in::before{width:100%}

  /* =========== WORKS =========== */
  .works{background:var(--paper)}
  .works .head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:30px;margin-bottom:52px}
  .works .head p{font-size:13px;color:var(--mut);letter-spacing:.04em;max-width:280px;text-align:right}
  .work-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
  .card{position:relative;cursor:pointer}
  .card .ph{aspect-ratio:3/4;overflow:hidden;background:var(--navy-dk);position:relative}
  .card .ph::after{content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,transparent 45%,rgba(13,15,16,.62));opacity:.75;transition:.6s;z-index:1}
  .card .ph img{width:100%;height:100%;object-fit:cover;filter:contrast(1.02);
    transition:transform 1.1s cubic-bezier(.19,1,.22,1),filter .6s}
  .card:hover .ph img{transform:scale(1.07);filter:contrast(1.05) brightness(1.04)}
  .card .cap{position:absolute;left:24px;right:24px;bottom:24px;z-index:2;color:var(--paper)}
  .card .cap .tag{font-size:10px;letter-spacing:.24em;text-transform:uppercase;color:rgba(239,238,233,.75)}
  .card .cap h4{font-family:var(--font-min);font-size:1.28rem;font-weight:500;margin-top:9px;line-height:1.4}
  .card .cap .meta{font-size:12px;color:rgba(239,238,233,.72);margin-top:8px;letter-spacing:.04em}
  .card .cap .ln{width:0;height:1px;background:var(--paper);margin-top:14px;transition:width .6s ease}
  .card:hover .cap .ln{width:46px}
  .works-note{margin-top:26px;font-size:11.5px;color:var(--stone);letter-spacing:.04em}

  /* =========== GALLERY (decorative) =========== */
  .gallery{background:var(--paper);padding:110px 0 130px;overflow:hidden}
  .g-grid{display:grid;grid-template-columns:1.1fr 1fr 1.1fr;gap:26px;align-items:start}
  .gallery figure{overflow:hidden}
  .g1{aspect-ratio:3/4;margin-top:64px}
  .g2{aspect-ratio:4/5}
  .g3{aspect-ratio:3/4;margin-top:110px}
  .gallery img{width:100%;height:100%;object-fit:cover;filter:contrast(1.02);
    transition:transform 1.2s cubic-bezier(.19,1,.22,1)}
  .gallery figure:hover img{transform:scale(1.05)}

  /* =========== ABOUT =========== */
  .about{background:var(--navy-dk);color:var(--paper)}
  .about .wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:start;position:relative;z-index:1}
  .about h2 .en{display:block;font-family:var(--font-cor);font-style:italic;font-weight:300;
    font-size:.5em;color:var(--pine-lt);margin-bottom:10px;letter-spacing:.04em}
  .about .intro{font-size:14px;line-height:2.15;color:rgba(239,238,233,.7);margin-top:26px;max-width:26em}
  .rows{border-top:1px solid var(--line-lt)}
  .row{display:grid;grid-template-columns:150px 1fr;gap:24px;padding:20px 4px;
    border-bottom:1px solid var(--line-lt);font-size:13.5px}
  .row dt{color:rgba(239,238,233,.5);letter-spacing:.1em;font-size:12px}
  .row dd{color:rgba(239,238,233,.92);line-height:1.9}
  .row dd .en{font-family:var(--font-cor);font-style:italic;color:var(--pine-lt);font-size:.92em}
  .row dd .nw{display:inline-block}
  .row dd .sub-note{font-size:11.5px;color:rgba(239,238,233,.5)}

  /* =========== CONTACT =========== */
  .contact{background:var(--pine);color:var(--paper);text-align:center;overflow:hidden;position:relative}
  .contact::before{content:"";position:absolute;inset:0;
    background:url(../img/contact-texture.webp) center/cover no-repeat;
    opacity:.5;mix-blend-mode:luminosity;pointer-events:none}
  .contact .grid-lines{background-image:linear-gradient(90deg,rgba(239,238,233,.06) 1px,transparent 1px)}
  .contact .wrap{position:relative;z-index:1}
  .contact .eyebrow{color:rgba(239,238,233,.7)}
  .contact .eyebrow::before{background:rgba(239,238,233,.7)}
  .contact h2{margin:26px 0 16px}
  .contact h2 .en{display:block;font-family:var(--font-cor);font-style:italic;font-weight:300;
    font-size:clamp(2.6rem,7vw,5.2rem);line-height:1.05;letter-spacing:.01em}
  .contact p{max-width:34em;margin:0 auto 42px;font-size:14px;line-height:2.1;color:rgba(239,238,233,.82)}
  .contact-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
  .btn{display:inline-flex;align-items:center;gap:12px;padding:16px 34px;font-size:13px;
    letter-spacing:.14em;border-radius:2px;transition:.4s;border:1px solid rgba(239,238,233,.5)}
  .btn.solid{background:var(--paper);color:var(--pine);border-color:var(--paper)}
  .btn.solid:hover{background:transparent;color:var(--paper)}
  .btn.ghost:hover{background:rgba(239,238,233,.1)}
  .btn .a{transition:transform .4s}
  .btn:hover .a{transform:translateX(5px)}

  /* =========== FOOTER =========== */
  footer{background:var(--petrol-dk);color:rgba(239,238,233,.7);padding:70px 0 34px}
  footer .top{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;
    padding-bottom:44px;border-bottom:1px solid rgba(239,238,233,.12)}
  footer .brand .wordmark{color:var(--paper)}
  footer .brand .sub{color:rgba(239,238,233,.5)}
  footer .fnav{display:flex;gap:44px;flex-wrap:wrap}
  footer .fcol h6{font-size:11px;letter-spacing:.2em;color:rgba(239,238,233,.45);
    text-transform:uppercase;margin-bottom:16px}
  footer .fcol a{display:block;font-size:13px;padding:5px 0;transition:color .3s}
  footer .fcol a:hover{color:var(--paper)}
  footer .bot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
    padding-top:26px;font-size:11.5px;letter-spacing:.06em;color:rgba(239,238,233,.4)}

  /* =========== REVEAL =========== */
  .rv{opacity:0;transform:translateY(26px);transition:opacity 1s cubic-bezier(.19,1,.22,1),transform 1s cubic-bezier(.19,1,.22,1)}
  .rv.in{opacity:1;transform:none}
  .rv.d1{transition-delay:.08s}.rv.d2{transition-delay:.16s}.rv.d3{transition-delay:.24s}
  .rv.d4{transition-delay:.32s}.rv.d5{transition-delay:.4s}

  /* =========== RESPONSIVE =========== */
  @media(max-width:980px){
    .hero-loc{display:none}
    .statement .cols{grid-template-columns:1fr;gap:34px}
    .work-grid{grid-template-columns:1fr 1fr}
    .steps{grid-template-columns:1fr 1fr;border-left:1px solid var(--line)}
    .step{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
    .about .wrap{grid-template-columns:1fr;gap:44px}
    .srv{grid-template-columns:60px 1fr auto;gap:20px}
    .srv .desc{grid-column:1/-1;padding-left:80px}
  }
  @media(max-width:640px){
    .wrap{padding:0 22px}
    .gallery{padding:70px 0}
    .g-grid{grid-template-columns:1fr 1fr;gap:14px}
    .g1{margin-top:34px}
    .g3{display:none}
    header.nav,header.nav.scrolled{padding:14px 22px}
    nav.menu{display:none}
    .burger{display:block}
    .section{padding:88px 0}
    .hero-loc{display:none}
    .hero-inner{padding-bottom:56px}
    .hero-foot{margin-top:34px}
    .scrollcue{display:none}
    .work-grid{grid-template-columns:1fr}
    .steps{grid-template-columns:1fr}
    .step{border-right:none}
    .srv{grid-template-columns:44px 1fr;gap:14px}
    .srv .arw{display:none}
    .srv .desc{padding-left:58px}
    .row{grid-template-columns:110px 1fr;gap:14px}
    .nav-cta{display:none}
  }
  @media(prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    .rv{opacity:1;transform:none}
    .hero h1 .l>span{transform:none}
    .hero .en,.hero-foot{opacity:1}
    .hero-bg{transform:none}
  }