/* UAS Gold Marketplace — shared light/dark theme (12 Nov 2026) */
:root,[data-theme=light]{--bg:#f6f4ee;--surface:#ffffff;--soft:#efebe0;--text:#151a20;--muted:#55606b;--line:#e2dccb;--gold:#c6a052;--gold-2:#efd89b;--gold-ink:#7a5a14;--accent-bg:#fbf6e8;--ok:#1d8a4f;--shadow:0 18px 40px #1b18100f;--radius:18px;color-scheme:light}
[data-theme=dark]{--bg:#0d1115;--surface:#151b21;--soft:#11161b;--text:#eef1f4;--muted:#a3adb7;--line:#28313b;--gold-ink:#e8cb86;--accent-bg:#1b1f1a;--ok:#3fbf7f;--shadow:0 18px 40px #0007;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,"Noto Sans",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
.skip{position:absolute;left:-999px;top:8px;background:var(--gold);color:#000;padding:10px 14px;border-radius:8px;z-index:99}.skip:focus{left:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}.narrow{max-width:820px}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:12px;font-weight:700;font-size:17px;text-decoration:none;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn-big{min-height:58px;padding:16px 28px;font-size:19px}
.btn-gold{background:linear-gradient(110deg,var(--gold-2),var(--gold));color:#211b0d}.btn-gold:hover{filter:brightness(1.06)}
.btn-outline{border-color:var(--text);color:var(--text);background:transparent}.btn-outline:hover{background:var(--soft)}
.btn-ghost{border-color:var(--line);color:var(--text);background:transparent;min-height:42px;padding:8px 16px;font-size:15px}
/* header */
.top{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:16px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}.brand b{display:block;font-size:18px;line-height:1.1}.brand small{display:block;font-size:13px;color:var(--muted)}
.mark{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;font:800 16px/1 Georgia,serif;color:#3a2c0f;background:linear-gradient(135deg,#f3dfaa,#c6a052);flex:none}
.links{display:flex;gap:20px;margin-left:auto;font-size:15px;font-weight:600}.links a{text-decoration:none;color:var(--muted);white-space:nowrap}.links a:hover{color:var(--text)}
.theme-btn{width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--text);font-size:18px;cursor:pointer;flex:none}
@media (max-width:900px){.links{display:none}.theme-btn{margin-left:auto}}
/* hero */
.hero{background:radial-gradient(ellipse at 90% 0%,#c6a05233,transparent 55%),var(--accent-bg);padding:56px 0 64px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:48px;align-items:center}
.eyebrow{font-size:13px;font-weight:800;letter-spacing:.16em;color:var(--gold-ink);margin:0 0 12px}
h1{font-size:clamp(38px,5.4vw,60px);line-height:1.05;letter-spacing:-.03em;margin:0 0 18px}
.lead{font-size:19px;color:var(--muted);max-width:620px;margin:0 0 26px}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}
.ticks{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:10px 22px;font-size:16px}.ticks li:before{content:"✓";color:var(--gold-ink);font-weight:800;margin-right:8px}
.price-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:var(--shadow)}
.pc-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.pc-head>div{min-width:0}
.pc-label{margin:0;font-weight:800;font-size:18px}.pc-sub{margin:2px 0 0;font-size:14px;color:var(--muted)}
.cur{flex:0 1 auto;min-width:0}.cur select,.filter select{font:700 16px system-ui;padding:10px 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);min-height:44px;max-width:170px;width:100%}
.pc-main{margin:18px 0 14px;padding:16px 18px;border-radius:14px;background:var(--accent-bg);border:1px solid var(--line)}
.pc-main span{display:block;font-size:clamp(30px,4vw,40px);font-weight:800;letter-spacing:-.02em;color:var(--gold-ink)}.pc-main small{font-size:15px;color:var(--muted)}
.karats{width:100%;border-collapse:collapse;font-size:16px}.karats th{text-align:left;font-size:13px;color:var(--muted);font-weight:700;padding:6px 4px;border-bottom:1px solid var(--line)}
.karats td{padding:10px 4px;border-bottom:1px solid var(--line)}.karats td:last-child,.karats th:last-child{text-align:right;font-weight:700}.karats small{color:var(--muted)}
.pc-note{font-size:14px;color:var(--muted);margin:12px 0 0}
/* sections */
.sec{padding:64px 0}.sec.alt{background:var(--soft)}
h2{font-size:clamp(28px,3.6vw,40px);line-height:1.15;letter-spacing:-.02em;margin:0 0 12px}
.sec-lead{font-size:18px;color:var(--muted);max-width:720px;margin:0 0 28px}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap}
.filter{display:grid;gap:4px;font-size:14px;font-weight:700;color:var(--muted)}.filter select{max-width:240px;min-width:200px}
.status-line{color:var(--muted);margin:4px 0 20px}
.listings{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.empty-list{grid-column:1/-1;background:var(--surface);border:2px dashed var(--line);border-radius:var(--radius);padding:32px;text-align:center}.empty-list h3{font-size:22px;margin:0 0 8px}.empty-list p{color:var(--muted);max-width:640px;margin:0 auto 16px}
.listing{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.listing img,.listing .noimg{width:100%;aspect-ratio:4/3;object-fit:cover;background:linear-gradient(135deg,#f3dfaa,#c6a052)}.listing .noimg{display:grid;place-items:center;font:800 40px Georgia,serif;color:#5b4413}
.li-body{padding:18px;display:flex;flex-direction:column;gap:6px;flex:1}.li-body h3{margin:0;font-size:19px}.li-meta,.li-seller{margin:0;color:var(--muted);font-size:15px}.li-price{margin:4px 0 0;font-size:17px}.li-price b{font-size:22px}.li-body .btn{margin-top:auto}
.li-tag{align-self:flex-start;font-size:13px;font-weight:800;padding:4px 10px;border-radius:999px;background:color-mix(in srgb,var(--ok) 15%,transparent);color:var(--ok)}.li-tag.wait{background:var(--soft);color:var(--muted)}
.how-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0 16px}
.how{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:10px}.how h3{margin:0;font-size:24px}.how .btn{align-self:flex-start;margin-top:auto}
.mini-steps{margin:0;padding-left:22px}.mini-steps li{margin:0 0 10px;color:var(--muted)}.mini-steps b{color:var(--text)}
.small{font-size:15px;color:var(--muted);margin:0}
.callout{background:var(--surface);border-left:5px solid var(--gold);border-radius:12px;padding:18px 20px}.callout a{color:var(--gold-ink);font-weight:700}
/* calculator */
.calc{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:28px;align-items:start}
fieldset{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);padding:20px 22px;margin:0 0 16px}
legend{font-weight:800;font-size:19px;padding:0 6px;display:flex;align-items:center;gap:10px}
.num{width:30px;height:30px;border-radius:50%;display:inline-grid;place-items:center;background:var(--gold);color:#211b0d;font-size:16px}
.choices{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:10px}
.choices button{font:600 16px system-ui;min-height:64px;padding:12px 10px;border-radius:14px;border:2px solid var(--line);background:var(--bg);color:var(--text);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center}
.choices button span{font-size:24px}
.choices button[aria-pressed=true]{border-color:var(--gold);background:color-mix(in srgb,var(--gold) 16%,var(--bg))}
.stamps{grid-template-columns:repeat(6,minmax(0,1fr))}.stamps b{font:800 22px/1 Georgia,serif}.stamps small{font-size:14px;color:var(--muted)}
.weight{display:flex;align-items:center;gap:12px}.weight input{font:800 28px system-ui;width:100%;max-width:240px;padding:12px 16px;border-radius:12px;border:2px solid var(--line);background:var(--bg);color:var(--text)}.weight span{font-size:18px;font-weight:700;color:var(--muted)}
.quick{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.quick button{font:700 15px system-ui;min-height:44px;padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer}
.result{position:sticky;top:90px;background:var(--surface);border:2px solid var(--gold);border-radius:22px;padding:26px;box-shadow:var(--shadow)}
.r-label{margin:0;color:var(--gold-ink);font-weight:800;letter-spacing:.08em;font-size:14px;text-transform:uppercase}
.r-value{font-size:clamp(32px,4vw,44px);font-weight:800;margin:6px 0 2px;letter-spacing:-.02em;word-break:break-word}.r-alt{margin:0 0 16px;color:var(--muted);font-size:16px}
.r-break{margin:0 0 14px}.r-break div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:16px}.r-break dt{color:var(--muted)}.r-break dd{margin:0;font-weight:700;text-align:right}
.r-formula{font-size:15px;color:var(--gold-ink);background:var(--accent-bg);border-radius:10px;padding:10px 12px;margin:0 0 14px}
.r-route{font-size:16px;margin:0 0 14px}.result .btn{width:100%}
/* services */
.svc-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:20px}
.svc-mini{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px}.svc-mini h3{margin:0 0 6px;font-size:19px}.svc-mini p{margin:0 0 10px;color:var(--muted);font-size:16px}.svc-mini a{color:var(--gold-ink);font-weight:700;text-decoration:none}
/* faq */
details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px 20px;margin:0 0 10px}
summary{cursor:pointer;font-weight:700;font-size:18px;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}summary::-webkit-details-marker{display:none}summary:after{content:"+";color:var(--gold-ink);font-size:24px;line-height:1}details[open] summary:after{content:"–"}
details p{margin:0 0 16px;color:var(--muted)}
/* footer */
.foot{background:var(--soft);border-top:1px solid var(--line);color:var(--muted);padding:40px 0 110px;font-size:15px}.foot .brand b{color:var(--text)}
.foot-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.foot-links{display:flex;flex-direction:column;gap:8px}.foot-links a{color:var(--gold-ink);text-decoration:none}
.dock{display:none}
@media (max-width:980px){.hero-grid,.calc{grid-template-columns:minmax(0,1fr)}.result{position:static}.listings,.svc-row,.how-grid{grid-template-columns:minmax(0,1fr)}.stamps{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:620px){
  .hero{padding:36px 0 40px}.lead{font-size:18px}.cta .btn{flex:1 1 100%}.acct{display:none}
  .choices{grid-template-columns:1fr 1fr}.foot-grid{grid-template-columns:1fr}.sec{padding:44px 0}fieldset{padding:16px}.price-card{padding:18px}.filter select{min-width:0;max-width:none}.filter{width:100%}
  .dock{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;z-index:40;background:var(--surface);border-top:1px solid var(--line);padding:8px 8px calc(8px + env(safe-area-inset-bottom))}
  .dock a{text-decoration:none;font-weight:700;font-size:15px;text-align:center;padding:10px 4px;border-radius:10px;color:var(--text)}.dock a.gold{background:linear-gradient(110deg,var(--gold-2),var(--gold));color:#211b0d}
}