:root{
  --bg:#ffffff; --tile:#ececec; --ink:#222222; --ink-2:#555555; --ink-3:#8f8f8f; --line:#e3e3e3;
  --dark:#1f1f1f; --ok:#2d6a4f; --err:#b3261e;
  --en:"Inter Tight","Helvetica Neue",Arial,sans-serif; --ja:"Noto Sans JP",system-ui,sans-serif;
  --side:clamp(16px,4.7vw,68px);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--ja);font-size:14px;line-height:1.9;letter-spacing:.04em;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25}
.label{font-family:var(--en);font-weight:600;font-size:15px;letter-spacing:.04em;margin:0 0 24px}
.label-offset{margin-left:calc(var(--side) + 22%);}
.label-light{color:#fff}

/* top bar + header */
.topbar{background:var(--dark);color:#eee;font-size:12px}
.topbar-in{display:flex;justify-content:space-between;gap:16px;padding:12px var(--side) 12px 32px}
.topbar a{text-decoration:none;font-family:var(--en);letter-spacing:.08em}
.hd{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:64px;padding:0 var(--side) 0 28px}
.mark{color:var(--ink);width:40px}
.mark svg{width:40px;height:20px;display:block}
.nav{display:flex;gap:16px;font-family:var(--en);font-size:13px;letter-spacing:.06em}
.nav a{text-decoration:none}
.nav a:hover{text-decoration:underline;text-underline-offset:4px}
.cart-btn{justify-self:end;border:0;background:none;font:500 13px var(--en);letter-spacing:.06em;color:var(--ink);cursor:pointer;padding:8px 0}

/* hero */
.hero{position:relative;padding-bottom:200px}
.wordmark{font-family:var(--en);font-weight:900;font-size:min(19.2vw,300px);line-height:.8;letter-spacing:-.035em;text-align:center;margin:clamp(40px,8vw,120px) 0 clamp(20px,2.4vw,34px);white-space:nowrap;overflow:hidden}
.hero-photo{aspect-ratio:3/1.85;overflow:hidden;background:#2b2a28}
.hero-photo img{width:100%;height:100%;object-fit:cover}
.hero-inset{position:absolute;left:38%;bottom:0;width:22.8%;aspect-ratio:4/5;overflow:hidden;background:#333}
.hero-inset img{width:100%;height:100%;object-fit:cover}

/* about */
.about{display:grid;grid-template-columns:22% 1fr;padding:28px var(--side) 140px}
.about .label{grid-column:1}
.about-body{grid-column:1/-1;margin-left:calc(38% - var(--side) * 1)}
.about h2{font-family:var(--en);font-weight:800;font-size:26px;letter-spacing:.01em;margin:6px 0 40px}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:32px;max-width:720px;margin-left:-26%}
.cols p{margin:0;color:var(--ink-2)}

/* products */
.products{padding:40px 0 120px}
.products-in{display:grid;grid-template-columns:22% 1fr;padding:0 0 0 var(--side)}
.side{padding-right:24px;position:sticky;top:90px;align-self:start}
.side-h{font-family:var(--en);font-weight:800;font-size:20px;letter-spacing:.01em}
.side-n{font-family:var(--en);font-size:13px;margin:8px 0 28px;color:var(--ink-2)}
.finder{display:grid;gap:18px}
.f-lab{margin:0 0 6px;font-size:12px;color:var(--ink-3)}
.chips{display:flex;flex-wrap:wrap;gap:4px 14px}
.chip{border:0;background:none;padding:2px 0;font:500 13px var(--en);letter-spacing:.03em;color:var(--ink-3);cursor:pointer;font-feature-settings:"tnum"}
.chip:hover{color:var(--ink)}
.chip[aria-pressed="true"]{color:var(--ink);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1.5px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:56px 28px;padding-right:var(--side)}
.card{display:block;background:none;border:0;padding:0;text-align:left;font:inherit;color:inherit;cursor:pointer}
.card-img{position:relative;background:var(--tile);aspect-ratio:4/3;overflow:hidden}
.card-img img{width:100%;height:100%;object-fit:cover;mix-blend-mode:multiply;transition:transform .5s ease}
.card:hover .card-img img{transform:scale(1.04)}
.badges{position:absolute;left:10px;top:10px;display:flex;gap:6px}
.badge{background:#fff;font:500 10px var(--en);letter-spacing:.05em;padding:3px 7px}
.card-name{font-family:var(--en);font-weight:600;font-size:15px;margin:16px 0 2px;letter-spacing:.03em}
.card-sub{font-size:11px;color:var(--ink-2);margin:0}
.card-price{font-family:var(--en);font-size:13px;margin:6px 0 10px}
.card-colors{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--ink-3)}
.sq{width:10px;height:10px;display:inline-block}
.sq.silver{background:#b9bcbf}.sq.black{background:#2d2d2d}
.card-cta{display:inline-flex;gap:6px;align-items:center;margin-top:10px;font:500 12px var(--en);letter-spacing:.06em;text-decoration:underline;text-underline-offset:4px}
.empty{grid-column:1/-1;color:var(--ink-3)}

/* features */
.features{padding:20px 0 0}
.feat{display:grid;grid-template-columns:1fr 1fr;min-height:min(62vw,880px)}
.feat-photo{overflow:hidden;background:#2b2a28}
.feat-photo img{width:100%;height:100%;object-fit:cover}
.feat-rev .feat-photo{order:2}
.feat-item{position:relative;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:60px 48px;cursor:pointer}
.feat-meta{position:absolute;top:28px;left:48px;right:48px;display:flex;justify-content:space-between;font:500 12px var(--en);letter-spacing:.06em}
.feat-img{width:min(420px,80%);aspect-ratio:1;margin-bottom:20px}
.feat-img img{width:100%;height:100%;object-fit:contain}
.feat-txt{width:min(340px,80%)}
.feat-txt h3{font-family:var(--en);font-weight:800;font-size:22px;letter-spacing:.02em;margin-bottom:10px}
.feat-txt p{margin:0;font-size:12px}

/* band */
.band{position:relative;margin-top:140px;min-height:min(56vw,760px);overflow:hidden;background:#333;color:#fff}
.band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.55),rgba(0,0,0,0) 60%)}
.band-copy{position:relative;z-index:1;padding:clamp(48px,9vw,140px) var(--side);max-width:640px}
.band h2{font-size:clamp(24px,3vw,38px);font-weight:700;margin-bottom:14px;letter-spacing:.06em}
.band p{margin:0;color:#eee}

/* guide */
.guide{padding:140px 0 120px}
.guide-in{display:grid;grid-template-columns:22% 1fr 1fr;padding:0 var(--side);gap:0 56px}
.guide-fig{grid-column:1;grid-row:1/3;margin:0;aspect-ratio:3/4;overflow:hidden;background:#2b2a28}
.guide-fig img{width:100%;height:100%;object-fit:cover}
.guide-h{grid-column:2}
.guide-h h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:.06em;margin-bottom:20px}
.guide-h p{color:var(--ink-2);margin:0}
.steps{grid-column:3;list-style:none;margin:0;padding:0;display:grid;gap:28px}
.steps li{display:grid;grid-template-columns:42px 1fr;border-top:1px solid var(--ink);padding-top:14px}
.no{font:600 13px var(--en)}
.steps b{display:block;font-size:15px;margin-bottom:4px}
.steps p{margin:0;color:var(--ink-2);font-size:13px}
.steps em{font-style:normal;text-decoration:underline;text-underline-offset:3px}
.guide-note{grid-column:2/-1;margin:48px 0 0;color:var(--ink-2)}

/* metal */
.metal{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:0}
.metal-photo{aspect-ratio:4/5;overflow:hidden;background:#2b2a28}
.metal-photo img{width:100%;height:100%;object-fit:cover}
.metal-copy{padding:60px clamp(24px,7vw,120px)}
.metal h2{font-size:clamp(28px,3.6vw,46px);font-weight:700;letter-spacing:.06em;margin-bottom:28px}
.metal-copy p:not(.label){color:var(--ink-2);margin:0 0 28px;max-width:30em}
.link-btn{font:600 13px var(--en);letter-spacing:.06em;text-decoration:underline;text-underline-offset:5px}

/* contact */
.contact{padding:140px 0 100px}
.contact-in{display:grid;grid-template-columns:22% 1fr 1fr;padding:0 var(--side);gap:0 56px}
.contact-h{grid-column:2}
.contact-h h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;letter-spacing:.06em;margin-bottom:16px}
.contact-h p{color:var(--ink-2);margin:0}
.contact .form{grid-column:3}
.form{display:grid;gap:16px}
.fld{display:grid;gap:6px}
.fld span{font-size:12px;font-weight:700}
.fld i{font-style:normal;font-weight:400;color:var(--ink-3);margin-left:6px}
.fld input,.fld textarea{font:inherit;letter-spacing:.02em;padding:10px 0;border:0;border-bottom:1px solid #bdbdbd;border-radius:0;background:transparent;color:var(--ink);width:100%}
.fld textarea{border:1px solid #bdbdbd;padding:10px}
.fld input:focus,.fld textarea:focus{outline:none;border-color:var(--ink)}
.seg{display:flex;flex-wrap:wrap;gap:6px 18px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{font-size:13px;color:var(--ink-3);cursor:pointer;padding:2px 0}
.seg input:checked+span{color:var(--ink);text-decoration:underline;text-underline-offset:5px}
.seg input:focus-visible+span{outline:1px solid var(--ink);outline-offset:3px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border:1px solid var(--ink);background:var(--ink);color:#fff;font:600 13px var(--en);letter-spacing:.1em;cursor:pointer;transition:background .2s,color .2s}
.btn:hover{background:#fff;color:var(--ink)}
.btn-ghost{background:#fff;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-block{width:100%}
.btn[disabled]{opacity:.45;pointer-events:none}
.form-msg{min-height:1.5em;margin:0;font-size:13px}
.form-msg.ok{color:var(--ok)}.form-msg.err{color:var(--err)}

/* info + footer */
.info{display:grid;grid-template-columns:22% repeat(3,1fr);gap:0 40px;padding:56px var(--side);border-top:1px solid var(--line)}
.info>div:first-child{grid-column:2}
.info h3{font:600 13px var(--en);letter-spacing:.08em;margin-bottom:8px}
.info p{margin:0;font-size:12px;color:var(--ink-2)}
.ft{background:var(--dark);color:#d9d9d9;padding:64px 0 28px;overflow:hidden}
.ft-wordmark{font-family:var(--en);font-weight:900;font-size:min(19.2vw,300px);line-height:.8;letter-spacing:-.035em;text-align:center;color:#fff;white-space:nowrap}
.ft-row{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;padding:48px var(--side) 0}
.ft nav{display:flex;flex-wrap:wrap;gap:8px 20px;font:500 12px var(--en);letter-spacing:.06em}
.ft a{text-decoration:none;color:#d9d9d9}
.ft small{font-size:11px;color:#9a9a9a}

/* product dialog */
.pd{border:0;padding:0;width:min(1040px,calc(100vw - 24px));max-height:calc(100dvh - 24px);background:#fff;color:var(--ink)}
.pd::backdrop{background:rgba(20,20,20,.6)}
.pd-in{display:grid;grid-template-columns:1.1fr 1fr}
.gal{background:var(--tile);padding:20px}
.gal-main{aspect-ratio:1;display:grid;place-items:center}
.gal-main img{max-height:100%;object-fit:contain;mix-blend-mode:multiply}
.gal-thumbs{display:flex;gap:8px;overflow-x:auto;padding-top:10px}
.gal-thumbs button{flex:0 0 58px;height:58px;border:1px solid transparent;background:#fff;padding:3px;cursor:pointer}
.gal-thumbs button[aria-current="true"]{border-color:var(--ink)}
.gal-thumbs img{width:100%;height:100%;object-fit:contain}
.pd-body{padding:40px 36px 36px;overflow:auto}
.pd-code{font:600 13px var(--en);letter-spacing:.08em;margin:0 0 6px}
.pd-body h3{font-size:18px;font-weight:700;letter-spacing:.04em;margin-bottom:20px;line-height:1.5}
.pd-dims{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--line);margin:0 0 22px}
.pd-dims div{padding:10px 0}
.pd-dims dt{font-size:11px;color:var(--ink-3)}
.pd-dims dd{margin:0;font:600 18px var(--en)}
.opt{display:flex;flex-wrap:wrap;gap:6px 20px;margin-bottom:14px}
.opt:empty{display:none}
.opt .chip{font-family:var(--ja);font-size:13px}
.pd-price{font:600 22px var(--en);margin:16px 0}
.pd-price small{font:400 12px var(--ja);color:var(--ink-3);margin-left:8px}
.pd-buy{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.pd-buy .btn{flex:1;min-width:180px}
.qty{display:flex;border:1px solid var(--ink);height:48px}
.qty button{border:0;background:none;width:40px;font-size:16px;cursor:pointer;color:var(--ink)}
.qty input{width:40px;border:0;text-align:center;font:inherit;background:transparent;color:var(--ink)}
.pd-body h4{font-size:13px;margin:0 0 6px}
.pd-specs,.pd-points{margin:0 0 16px;padding-left:1.2em;color:var(--ink-2);font-size:13px}
.pd-points{list-style:none;padding:0}
.pd-points li{margin-bottom:6px}
.pd-warn{font-size:12px;color:var(--err);margin:0}
.x{position:absolute;right:12px;top:10px;z-index:2;width:36px;height:36px;border:0;background:#fff;color:var(--ink);font-size:22px;cursor:pointer}

/* drawer */
.drawer{position:fixed;inset:0;z-index:50;visibility:hidden}
.drawer[aria-hidden="false"]{visibility:visible}
.drawer-bg{position:absolute;inset:0;background:rgba(20,20,20,.5);opacity:0;transition:opacity .2s}
.drawer[aria-hidden="false"] .drawer-bg{opacity:1}
.drawer-panel{position:absolute;right:0;top:0;bottom:0;width:min(440px,100vw);background:#fff;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .25s ease}
.drawer[aria-hidden="false"] .drawer-panel{transform:none}
.drawer-hd{position:relative;padding:20px 24px;border-bottom:1px solid var(--line)}
.drawer-hd h3{font:600 15px var(--en);letter-spacing:.06em}
.drawer-body{padding:12px 24px 28px;overflow:auto;flex:1}
.ci{display:grid;grid-template-columns:64px 1fr auto;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);align-items:center}
.ci img{width:64px;height:64px;object-fit:contain;background:var(--tile);mix-blend-mode:multiply}
.ci-name{font-size:13px;font-weight:700;line-height:1.5}
.ci-sub{font-size:11px;color:var(--ink-3)}
.ci-right{text-align:right;font:500 13px var(--en)}
.ci .qty{height:32px;margin-bottom:4px}
.ci .qty button{width:28px}
.ci .qty input{width:28px}
.ci-rm{border:0;background:none;color:var(--ink-3);font-size:11px;cursor:pointer;text-decoration:underline;padding:0}
.sum{margin:18px 0;display:grid;gap:4px;font-feature-settings:"tnum"}
.sum div{display:flex;justify-content:space-between;font-size:13px;color:var(--ink-2)}
.sum .tot{font:600 17px var(--en);color:var(--ink);border-top:1px solid var(--ink);padding-top:10px;margin-top:6px}
.done{text-align:center;padding:24px 0}
.done b{font:600 20px var(--en);letter-spacing:.06em}
.bank{background:var(--tile);padding:14px;font-size:12px;text-align:left;margin:18px 0}
.drawer .seg{gap:6px 18px}

.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,40px);opacity:0;background:var(--ink);color:#fff;padding:10px 20px;font-size:13px;transition:all .25s;z-index:60;pointer-events:none}
.toast.show{transform:translate(-50%,0);opacity:1}

@media (max-width:900px){
  .nav{display:none}
  .hd{grid-template-columns:1fr auto;padding:0 16px}
  .topbar-in{padding:10px 16px;font-size:11px}
  .topbar a{display:none}
  .label-offset{margin-left:16px}
  .hero{padding-bottom:120px}
  .hero-photo{aspect-ratio:4/5}
  .hero-inset{left:auto;right:16px;width:42%}
  .about{display:block;padding:24px 16px 80px}
  .about-body{margin:0}
  .cols{grid-template-columns:1fr;margin:0;gap:16px}
  .products-in{grid-template-columns:1fr;padding:0 16px}
  .side{position:static;padding:0 0 28px}
  .grid{grid-template-columns:repeat(2,1fr);gap:36px 14px;padding:0}
  .feat,.metal{grid-template-columns:1fr;min-height:0}
  .feat-photo{aspect-ratio:4/5}
  .feat-rev .feat-photo{order:0}
  .feat-item{padding:72px 16px 64px}
  .feat-meta{left:16px;right:16px}
  .band{margin-top:80px;min-height:120vw}
  .band::after{background:linear-gradient(0deg,rgba(0,0,0,.6),rgba(0,0,0,0) 70%)}
  .band-copy{position:absolute;bottom:0;padding:32px 16px}
  .guide,.contact{padding:90px 0 70px}
  .guide-in,.contact-in{grid-template-columns:1fr;padding:0 16px;gap:32px}
  .guide-h,.steps,.guide-note,.contact-h,.contact .form,.guide-fig{grid-column:1}
  .guide-fig{grid-row:auto;aspect-ratio:4/3}
  .guide-note{margin:0}
  .metal-copy{padding:48px 16px 24px}
  .info{grid-template-columns:1fr;gap:24px;padding:40px 16px}
  .info>div:first-child{grid-column:1}
  .ft-row{padding:36px 16px 0}
  .pd-in{grid-template-columns:1fr}
  .pd-body{padding:24px 16px 28px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* サブページ(特商法・管理画面)のヘッダー */
.wrap{max-width:1120px;margin:0 auto;padding:0 16px}
.hd-in{display:flex;align-items:center;gap:20px;height:64px;grid-column:1/-1}
.logo{font:900 20px var(--en);letter-spacing:-.02em;text-decoration:none;color:var(--ink)}
.hd:has(.hd-in){display:block;padding:0}