/* =========================================================
   数野組 KAZUNOGUMI — shared design system (light / 案B)
   ========================================================= */
:root{
  --bg:#ffffff;
  --bg2:#f5f3ef;
  --bg3:#ece7df;
  --ink:#17191c;
  --ink2:#3a3d42;
  --sub:#6b6660;
  --accent:#e8531c;      /* safety orange */
  --accent-d:#c9410f;
  --blue:#0e63c4;        /* infra blue  */
  --line:#e6e2db;
  --dark:#14161a;        /* dark bands  */
  --maxw:1180px;
  --r:14px;
  --shadow:0 16px 40px rgba(20,22,26,.10);
  --shadow-s:0 6px 20px rgba(20,22,26,.08);
  --ease:cubic-bezier(.16,.68,.32,1);
  font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:840px;margin:0 auto;padding:0 24px}

/* ---------- typography helpers ---------- */
.eyebrow{color:var(--accent);letter-spacing:.34em;font-size:12px;font-weight:800;display:inline-block}
.sec-h{font-size:clamp(28px,4.4vw,42px);font-weight:900;letter-spacing:.03em;line-height:1.28;margin:12px 0 6px}
.sec-h .en{display:block;font-size:12.5px;color:var(--sub);letter-spacing:.28em;font-weight:600;margin-top:8px}
.lead{color:var(--ink2);font-size:16px}
.center{text-align:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:.6em;background:var(--accent);color:#fff;padding:16px 40px;font-weight:800;letter-spacing:.06em;border-radius:44px;font-size:15px;transition:.3s var(--ease);border:none;cursor:pointer}
.btn:hover{background:var(--accent-d);transform:translateY(-2px);box-shadow:0 10px 24px rgba(232,83,28,.34)}
.btn.ghost{background:#fff;color:var(--ink);border:1.5px solid var(--ink)}
.btn.ghost:hover{background:var(--ink);color:#fff;box-shadow:none}
.btn.wide{padding:18px 54px}
.btn .arw{transition:.3s}
.btn:hover .arw{transform:translateX(4px)}

/* ---------- header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;display:flex;align-items:center;justify-content:space-between;
  padding:18px 30px;transition:.35s var(--ease)}
.site-header .logo{font-weight:900;font-size:24px;letter-spacing:.24em;color:#fff;text-shadow:0 2px 14px rgba(0,0,0,.4);transition:.35s}
.site-header .logo small{display:block;font-size:9px;letter-spacing:.3em;font-weight:600;opacity:.85;margin-top:2px}
.site-nav{display:flex;align-items:center;gap:28px}
.site-nav a{color:#fff;font-size:13.5px;font-weight:700;letter-spacing:.1em;text-shadow:0 1px 8px rgba(0,0,0,.3);transition:.25s}
.site-nav a.pill{background:var(--accent);padding:11px 22px;border-radius:40px;text-shadow:none}
.site-nav a.pill:hover{background:var(--accent-d)}
.site-nav a:not(.pill):hover{color:#ffd9c6}
/* scrolled state */
.site-header.solid{background:rgba(255,255,255,.94);backdrop-filter:blur(10px);box-shadow:0 2px 20px rgba(0,0,0,.06);padding:12px 30px}
.site-header.solid .logo{color:var(--ink);text-shadow:none}
.site-header.solid .site-nav a{color:var(--ink);text-shadow:none}
.site-header.solid .site-nav a.pill{color:#fff}
.site-header.solid .site-nav a:not(.pill):hover{color:var(--accent)}
/* hamburger */
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;z-index:70}
.burger span{width:26px;height:2px;background:#fff;transition:.3s}
.site-header.solid .burger span{background:var(--ink)}

/* ---------- hero (page) ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:flex-end;overflow:hidden}
.hero.short{min-height:56vh}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;animation:heroZoom 14s var(--ease) forwards}
@keyframes heroZoom{from{transform:scale(1.08)}to{transform:scale(1)}}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 35%,rgba(0,0,0,.62));z-index:1}
.hero .hero-in{position:relative;z-index:2;color:#fff;padding-bottom:9vh;width:100%}
.hero .kick{font-size:13px;font-weight:800;letter-spacing:.34em;margin-bottom:18px}
.hero .kick .b{background:var(--accent);padding:3px 11px;border-radius:3px;letter-spacing:.2em}
.hero h1{font-size:clamp(38px,7vw,88px);font-weight:900;line-height:1.12;letter-spacing:.02em;text-shadow:0 3px 30px rgba(0,0,0,.4)}
.hero .sub{margin-top:20px;max-width:600px;font-size:16.5px;font-weight:500;text-shadow:0 2px 12px rgba(0,0,0,.5)}
.hero .scroll{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);z-index:3;color:#fff;font-size:10px;letter-spacing:.3em;writing-mode:vertical-rl;opacity:.8}
.hero .scroll::after{content:"";display:block;width:1px;height:44px;background:#fff;margin:10px auto 0;animation:scrolly 1.8s ease-in-out infinite}
@keyframes scrolly{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
/* page hero (sub pages) */
.page-hero{position:relative;padding:150px 0 60px;overflow:hidden;color:#fff;min-height:44vh;display:flex;align-items:flex-end}
.page-hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.72),rgba(0,0,0,.35));z-index:1}
.page-hero .inner{position:relative;z-index:2}
.page-hero h1{font-size:clamp(32px,5.5vw,58px);font-weight:900;letter-spacing:.04em}
.page-hero .en{display:block;font-size:12px;letter-spacing:.32em;color:#ffd9c6;font-weight:700;margin-bottom:10px}

/* ---------- stats band ---------- */
.stats{background:var(--dark);color:#fff}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:46px 18px;text-align:center;border-right:1px solid rgba(255,255,255,.1)}
.stat:last-child{border-right:none}
.stat .n{font-size:clamp(38px,5vw,54px);font-weight:900;line-height:1}
.stat .n small{font-size:20px;color:var(--accent);margin-left:3px;font-weight:800}
.stat .l{margin-top:10px;font-size:13px;color:#b7b2ab;letter-spacing:.08em}

/* ---------- generic section ---------- */
.section{padding:100px 0}
.section.tight{padding:72px 0}
.section.bg2{background:var(--bg2)}
.section.dark{background:var(--dark);color:#fff}
.section.dark .sec-h{color:#fff}
.section.dark .lead{color:#c9c4bc}

/* ---------- business cards ---------- */
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px}
.biz-card{background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow-s);transition:.4s var(--ease)}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.biz-card .ph{height:200px;overflow:hidden}
.biz-card .ph img{width:100%;height:100%;object-fit:cover;transition:.6s var(--ease)}
.biz-card:hover .ph img{transform:scale(1.07)}
.biz-card .tx{padding:22px 20px 26px}
.biz-card .tx .en{font-size:11px;color:var(--blue);letter-spacing:.18em;font-weight:800}
.biz-card .tx b{display:block;font-size:20px;font-weight:900;margin:3px 0 8px}
.biz-card .tx p{font-size:13px;color:var(--sub);line-height:1.75}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.rev .txt{order:2}
.split .ph{border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:4/3}
.split .ph img{width:100%;height:100%;object-fit:cover}
.split .txt h3{font-size:clamp(24px,3.4vw,34px);font-weight:900;line-height:1.35;margin:10px 0 16px}
.split .txt p{color:var(--ink2)}

/* ---------- works gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:46px}
.gal .item{position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:4/3;box-shadow:var(--shadow-s)}
.gal .item img{width:100%;height:100%;object-fit:cover;transition:.6s var(--ease)}
.gal .item:hover img{transform:scale(1.08)}
.gal .item .cap{position:absolute;left:0;right:0;bottom:0;padding:22px 18px 16px;color:#fff;
  background:linear-gradient(transparent,rgba(0,0,0,.82));font-weight:700}
.gal .item .cap small{display:block;font-size:11px;color:#ffd9c6;font-weight:600;letter-spacing:.1em}

/* ---------- history / timeline ---------- */
.history{max-width:900px;margin:46px auto 0}
.hrow{display:grid;grid-template-columns:150px 1fr;gap:24px;padding:20px 0;border-bottom:1px solid var(--line)}
.hrow .yr{font-weight:900;color:var(--ink);font-size:17px}
.hrow .yr small{display:block;font-size:12px;color:var(--sub);font-weight:600}
.hrow ul{list-style:none}
.hrow li{color:var(--ink2);font-size:14.5px;padding:3px 0;position:relative;padding-left:18px}
.hrow li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hrow li .g{color:var(--sub);font-size:12.5px}

/* ---------- company table ---------- */
.co-table{width:100%;border-collapse:collapse;margin-top:8px}
.co-table th,.co-table td{text-align:left;padding:16px 8px;border-bottom:1px solid var(--line);vertical-align:top;font-size:15px}
.co-table th{width:200px;color:var(--sub);font-weight:700;white-space:nowrap}
.co-table td{color:var(--ink)}

/* ---------- steps / flow ---------- */
.flow{counter-reset:step;margin-top:48px;display:grid;gap:16px;max-width:820px;margin-left:auto;margin-right:auto}
.flow .step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 28px 26px 92px;box-shadow:var(--shadow-s)}
.flow .step::before{counter-increment:step;content:"0" counter(step);position:absolute;left:24px;top:22px;font-size:30px;font-weight:900;color:var(--accent);font-style:italic}
.flow .step b{font-size:18px;font-weight:900}
.flow .step p{color:var(--sub);font-size:14px;margin-top:6px}

/* ---------- reasons (numbered feature list) ---------- */
.reasons{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:48px}
.reason{background:#fff;border-radius:var(--r);padding:34px 30px;box-shadow:var(--shadow-s);border-top:4px solid var(--accent)}
.reason .no{font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.14em}
.reason h4{font-size:21px;font-weight:900;margin:8px 0 12px;line-height:1.4}
.reason p{color:var(--ink2);font-size:14.5px}

/* ---------- interview cards ---------- */
.people{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:48px}
.person{background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow-s);transition:.4s var(--ease)}
.person:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.person .ph{aspect-ratio:3/4;overflow:hidden}
.person .ph img{width:100%;height:100%;object-fit:cover}
.person .tx{padding:22px 22px 26px}
.person .role{font-size:12px;color:var(--accent);font-weight:800;letter-spacing:.1em}
.person h4{font-size:19px;font-weight:900;margin:4px 0 10px}
.person p{font-size:13.5px;color:var(--sub)}
.person .q{font-weight:800;color:var(--ink);font-size:15px;margin-bottom:8px}

/* ---------- instagram ---------- */
.ig-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:40px}
.ig-grid a{position:relative;aspect-ratio:1;border-radius:10px;overflow:hidden;display:block}
.ig-grid img{width:100%;height:100%;object-fit:cover;transition:.5s}
.ig-grid a:hover img{transform:scale(1.08)}
.ig-grid a::after{content:"";position:absolute;inset:0;background:rgba(232,83,28,0);transition:.3s}
.ig-grid a:hover::after{background:rgba(232,83,28,.25)}

/* ---------- CTA band ---------- */
.cta-band{position:relative;padding:120px 0;overflow:hidden;color:#fff;text-align:center}
.cta-band>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(rgba(20,22,26,.72),rgba(232,83,28,.55));z-index:1}
.cta-band .inner{position:relative;z-index:2}
.cta-band h2{font-size:clamp(28px,5vw,50px);font-weight:900;line-height:1.3}
.cta-band p{margin:18px auto 34px;max-width:560px}

/* ---------- forms ---------- */
.form-card{background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:44px clamp(22px,4vw,56px);max-width:820px;margin:0 auto}
.field{margin-bottom:24px}
.field label{display:block;font-weight:700;font-size:14.5px;margin-bottom:8px}
.field label .req{color:var(--accent);font-size:12px;margin-left:6px;font-weight:800}
.field label .opt{color:var(--sub);font-size:12px;margin-left:6px;font-weight:500}
.field input[type=text],.field input[type=email],.field input[type=tel],.field input[type=number],
.field select,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:14px 16px;font-size:15px;
  font-family:inherit;background:var(--bg2);transition:.2s;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px rgba(232,83,28,.12)}
.field textarea{min-height:150px;resize:vertical}
.field .hint{font-size:12.5px;color:var(--sub);margin-top:6px}
.field.file input[type=file]{width:100%;border:1.5px dashed var(--line);border-radius:10px;padding:16px;background:var(--bg2);font-size:14px;cursor:pointer}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.radio-row{display:flex;flex-wrap:wrap;gap:10px}
.radio-row label{display:inline-flex;align-items:center;gap:8px;background:var(--bg2);border:1.5px solid var(--line);border-radius:40px;
  padding:10px 18px;font-size:14px;font-weight:600;cursor:pointer;margin:0;transition:.2s}
.radio-row input{accent-color:var(--accent)}
.radio-row label:has(input:checked){border-color:var(--accent);background:#fff5f0;color:var(--accent-d)}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13.5px;color:var(--ink2);background:var(--bg2);padding:16px;border-radius:10px}
.agree input{margin-top:5px;accent-color:var(--accent)}
.form-submit{text-align:center;margin-top:30px}
.form-note{font-size:12.5px;color:var(--sub);text-align:center;margin-top:16px}
.form-msg{display:none;text-align:center;padding:40px 20px}
.form-msg.show{display:block}
.form-msg .ic{font-size:44px}
.form-msg h3{font-size:24px;font-weight:900;margin:12px 0 8px}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#cfcac2;padding:70px 0 30px}
.site-footer .top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.site-footer .brand{font-size:28px;font-weight:900;letter-spacing:.2em;color:#fff}
.site-footer .brand small{display:block;font-size:11px;letter-spacing:.24em;opacity:.7;margin-top:8px;font-weight:500}
.site-footer address{font-style:normal;font-size:14px;line-height:2;margin-top:16px}
.site-footer h5{color:#fff;font-size:13px;letter-spacing:.14em;font-weight:800;margin-bottom:14px}
.site-footer ul{list-style:none}
.site-footer ul li{margin-bottom:10px}
.site-footer ul a{font-size:14px;transition:.2s}
.site-footer ul a:hover{color:var(--accent)}
.site-footer .tel{font-size:26px;font-weight:900;color:#fff;letter-spacing:.04em}
.site-footer .copy{text-align:center;font-size:12px;color:#8a857e;padding-top:26px}
.sns{display:flex;gap:12px;margin-top:14px}
.sns a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.08);display:grid;place-items:center;transition:.25s}
.sns a:hover{background:var(--accent)}
.sns svg{width:20px;height:20px;fill:#fff}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:.8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- helper: note for provisional content ---------- */
.prov{display:inline-block;font-size:11px;color:var(--accent-d);background:#fff2ec;border:1px solid #ffd3c1;
  border-radius:4px;padding:2px 8px;font-weight:700;letter-spacing:.04em}

/* =========================================================
   Responsive
   ========================================================= */
@media(max-width:900px){
  .biz-grid,.gal,.people,.ig-grid{grid-template-columns:repeat(2,1fr)}
  .split,.reasons{grid-template-columns:1fr;gap:30px}
  .split.rev .txt{order:0}
  .site-footer .top{grid-template-columns:1fr;gap:28px}
  .stat{padding:32px 10px}
}
@media(max-width:760px){
  .burger{display:flex}
  /* backdrop-filter on a fixed header creates a containing block that would trap
     the fixed nav overlay inside the header height — disable it on mobile */
  .site-header.solid{backdrop-filter:none}
  .site-nav{position:fixed;inset:0;height:100vh;background:rgba(20,22,26,.98);flex-direction:column;justify-content:center;gap:26px;
    transform:translateX(100%);transition:.4s var(--ease);z-index:65}
  .site-nav.open{transform:none}
  .site-nav a{color:#fff!important;font-size:18px;text-shadow:none}
  .burger.active span{background:#fff}
  .burger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.active span:nth-child(2){opacity:0}
  .burger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .stats .grid{grid-template-columns:repeat(2,1fr)}
  .stat{border-bottom:1px solid rgba(255,255,255,.1)}
  .f2{grid-template-columns:1fr}
  .hrow{grid-template-columns:1fr;gap:6px}
  .section{padding:70px 0}
  .flow .step{padding:22px 20px 22px 76px}
}
@media(max-width:460px){
  .biz-grid,.gal,.people{grid-template-columns:1fr}
  .ig-grid{grid-template-columns:repeat(2,1fr)}
}