:root{--bg:#f6f7fb;--card:#fff;--text:#0f172a;--muted:#64748b;--line:#e5e7ef;--brand:#4f46e5;--brand2:#06b6d4;--ok:#16a34a;--warn:#d97706;--bad:#dc2626;--soft:#eef2ff;--shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06);--r:16px}
[data-theme=dark]{--bg:#0b1020;--card:#121a2e;--text:#e5e7eb;--muted:#94a3b8;--line:#1f2a44;--soft:#1b2342;--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35)}
*{box-sizing:border-box}html,body{margin:0}body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}
a{color:var(--brand);text-decoration:none}h1,h2,h3{margin:0 0 .5rem;letter-spacing:-.01em}h1{font-size:22px}h2{font-size:16px}
.layout{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.side{background:var(--card);border-right:1px solid var(--line);padding:20px 14px;position:sticky;top:0;height:100vh}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;padding:4px 8px 18px}
.logo i{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:#fff;font-style:normal;font-size:15px}
.nav a{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;color:var(--muted);font-weight:500;margin-bottom:2px}
.nav a:hover{background:var(--soft);color:var(--text)}.nav a.on{background:var(--soft);color:var(--brand);font-weight:600}
.main{padding:24px 28px;max-width:1200px;width:100%}
.top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;gap:12px;flex-wrap:wrap}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:18px}
.grid{display:grid;gap:14px}.g4{grid-template-columns:repeat(4,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:1fr 1fr}
.stat .k{color:var(--muted);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.04em}.stat .v{font-size:22px;font-weight:800;margin-top:4px}
.stat.hero{background:linear-gradient(135deg,var(--brand),#7c3aed);color:#fff;border:0}.stat.hero .k{color:#e0e7ff}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-size:12px;font-weight:600}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:600}
.s-paid,.s-approved{background:#dcfce7;color:#166534}.s-pending{background:#fef3c7;color:#92400e}.s-failed,.s-expired,.s-rejected{background:#fee2e2;color:#991b1b}
.s-sandbox{background:#e0f2fe;color:#075985}.s-live{background:#ede9fe;color:#5b21b6}
[data-theme=dark] .pill{filter:saturate(.8) brightness(.9)}
label{display:block;font-weight:600;font-size:13px;margin:10px 0 6px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text);font:inherit}
input:focus,select:focus{outline:2px solid var(--brand);border-color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--text);font-weight:600;cursor:pointer;font:inherit;font-weight:600}
.btn.p{background:var(--brand);border-color:var(--brand);color:#fff}.btn.d{color:var(--bad)}.btn.sm{padding:6px 10px;font-size:12px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.muted{color:var(--muted)}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;word-break:break-all}
.flash{padding:12px 14px;border-radius:12px;margin-bottom:14px;background:var(--soft);border:1px solid var(--line)}.flash.err{background:#fee2e2;color:#991b1b;border-color:#fecaca}
.toggle{display:inline-flex;background:var(--soft);border-radius:999px;padding:4px}.toggle button{border:0;background:transparent;padding:6px 14px;border-radius:999px;font-weight:600;color:var(--muted);cursor:pointer;font:inherit}.toggle button.on{background:var(--card);color:var(--text);box-shadow:var(--shadow)}
pre{background:var(--soft);padding:12px;border-radius:12px;overflow:auto;font-size:12px}
.themebtn{border:1px solid var(--line);background:var(--card);color:var(--text);width:38px;height:38px;border-radius:10px;cursor:pointer;font-size:16px}
@media (max-width:900px){.layout{grid-template-columns:1fr}.side{position:static;height:auto}.g4,.g3,.g2{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.g4,.g3,.g2{grid-template-columns:1fr}.main{padding:16px}}
/* checkout */
.co{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(1200px 500px at 50% -10%,var(--soft),transparent),var(--bg)}
.co-card{width:100%;max-width:420px;background:var(--card);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}
.co-head{padding:20px 22px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.co-merchant{display:flex;gap:12px;align-items:center}.avatar{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
.co-body{padding:20px 22px}.total{font-size:30px;font-weight:800;letter-spacing:-.02em}
.qrbox{background:#fff;border-radius:18px;padding:14px;border:1px solid var(--line);display:grid;place-items:center;margin:16px 0;position:relative}
.qrbox img{width:100%;max-width:300px;aspect-ratio:1;image-rendering:pixelated}
.qrbox .overlay{position:absolute;inset:0;border-radius:18px;display:none;place-items:center;background:rgba(255,255,255,.92);color:#0f172a;font-weight:700;font-size:18px;text-align:center;padding:20px}
.timer{display:flex;justify-content:space-between;align-items:center;background:var(--soft);padding:10px 14px;border-radius:12px;font-weight:600}
.timer b{font-variant-numeric:tabular-nums;font-size:18px}
.brk{margin-top:14px}.brk div{display:flex;justify-content:space-between;padding:6px 0;color:var(--muted)}.brk div.t{color:var(--text);font-weight:700;border-top:1px dashed var(--line);margin-top:4px;padding-top:10px}
.acts{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:16px}
.steps{margin:16px 0 0;padding-left:18px;color:var(--muted)}
.co-foot{padding:14px 22px;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:12px}
.banner{padding:10px 14px;border-radius:12px;font-weight:600;margin-bottom:12px;text-align:center}
.banner.ok{background:#dcfce7;color:#166534}.banner.bad{background:#fee2e2;color:#991b1b}.banner.sbx{background:#e0f2fe;color:#075985;font-size:12px}
.spin{width:10px;height:10px;border-radius:50%;background:var(--warn);display:inline-block;animation:pulse 1.2s infinite}@keyframes pulse{50%{opacity:.3}}
/* portal extras */
.who{display:flex;gap:10px;align-items:center;padding:10px;margin:0 0 12px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.who .muted{font-size:12px}.avatar.sm{width:34px;height:34px;font-size:15px;border-radius:10px;flex:none}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.tabs{display:inline-flex;background:var(--soft);border-radius:999px;padding:4px;gap:2px;flex-wrap:wrap}.tabs a{padding:6px 14px;border-radius:999px;color:var(--muted);font-weight:600}.tabs a.on{background:var(--card);color:var(--text);box-shadow:var(--shadow)}
.keybox{display:flex;gap:8px;align-items:center;flex-wrap:wrap;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:8px 10px}.keybox code{flex:1;min-width:180px}.keybox form{margin:0}
label.check{display:flex;gap:8px;align-items:center;font-weight:500}label.check input{width:auto}
.btn[disabled]{opacity:.5;cursor:not-allowed}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.92em;background:var(--soft);padding:1px 6px;border-radius:6px}
pre code{background:none;padding:0;font-size:12.5px}
.stat .v{word-break:break-word}
/* docs */
body.docs{background:var(--bg)}
.dtop{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 24px;background:color-mix(in srgb,var(--card) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);flex-wrap:wrap}
.dtop .logo{color:var(--text)}
.dlinks{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.dlinks a{padding:7px 12px;border-radius:10px;color:var(--muted);font-weight:600}.dlinks a:hover{background:var(--soft);color:var(--text)}.dlinks a.on{background:var(--soft);color:var(--brand)}
.dwrap{display:grid;grid-template-columns:260px minmax(0,1fr);max-width:1240px;margin:0 auto;gap:28px;padding:0 24px}
.dside-in{position:sticky;top:76px;padding:24px 0;max-height:calc(100vh - 76px);overflow:auto}
.dside a{display:block;padding:6px 10px;border-radius:8px;color:var(--muted);font-size:13.5px;border-left:2px solid transparent}.dside a:hover{color:var(--text);background:var(--soft)}.dside a.on{color:var(--brand);border-left-color:var(--brand);background:var(--soft);font-weight:600}
.dcontent{padding:28px 0 60px;min-width:0;max-width:900px;font-size:15px;line-height:1.7}
.dcontent h1{font-size:32px;margin-bottom:12px}.dcontent h2{font-size:22px;margin:40px 0 12px;padding-top:12px;border-top:1px solid var(--line)}.dcontent h3{font-size:17px;margin:24px 0 8px}
.dcontent .anchor{opacity:0;margin-left:-20px;width:20px;display:inline-block;color:var(--muted)}.dcontent h2:hover .anchor,.dcontent h3:hover .anchor{opacity:1}
.dcontent h2,.dcontent h3{scroll-margin-top:80px}
.dcontent blockquote{margin:16px 0;padding:12px 16px;border-left:4px solid var(--brand);background:var(--soft);border-radius:0 12px 12px 0}.dcontent blockquote p{margin:0}
.dcontent table{margin:12px 0;font-size:14px;background:var(--card);border:1px solid var(--line);border-radius:12px;border-collapse:separate;border-spacing:0;overflow:hidden}.dcontent th{background:var(--soft)}.dcontent tr:last-child td{border-bottom:0}
.dcontent pre{position:relative;background:#0f172a;color:#e2e8f0;padding:16px;border-radius:12px;font-size:12.5px;line-height:1.55;border:1px solid var(--line)}
.dcontent pre code{color:inherit}
[data-theme=dark] .dcontent pre{background:#070b16}
.copybtn{position:absolute;top:8px;right:8px;border:1px solid #334155;background:#1e293b;color:#e2e8f0;border-radius:8px;padding:4px 10px;font:600 12px/1.4 inherit;cursor:pointer;opacity:.85}.copybtn:hover{opacity:1}
.tabs-code{margin:14px 0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--card)}
.tabbar{display:flex;gap:4px;padding:8px 8px 0;background:var(--soft);border-bottom:1px solid var(--line)}.tabbar button{border:0;background:transparent;padding:8px 14px;border-radius:10px 10px 0 0;font:600 13px/1 inherit;color:var(--muted);cursor:pointer}.tabbar button.on{background:var(--card);color:var(--text)}
.tabs-code pre{margin:0;border-radius:0;border:0}.codehead{padding:6px 14px;background:#0f172a;color:#94a3b8;border-bottom:1px solid #1e293b}.codehead .mono{font-size:11.5px}
[data-theme=dark] .codehead{background:#070b16}
.dcontent ul.contains-task-list,.dcontent ul:has(> li > input[type=checkbox]){list-style:none;padding-left:4px}.dcontent li input[type=checkbox]{width:auto;margin-right:8px}
.dfoot{margin-top:48px;padding-top:16px;border-top:1px solid var(--line);font-size:13px}
@media (max-width:900px){.dwrap{grid-template-columns:1fr;padding:0 16px}.dside{display:none}.dtop{padding:10px 16px}.dcontent h1{font-size:26px}}
.homecard{display:flex;flex-direction:column;gap:6px;color:var(--text);transition:transform .15s,border-color .15s}.homecard:hover{transform:translateY(-2px);border-color:var(--brand)}.homecard b{font-size:16px}
.homecard.pri{background:linear-gradient(135deg,var(--brand),#7c3aed);color:#fff;border:0}.homecard.pri .muted{color:#e0e7ff}
/* layout polish */
td.num,th.num{white-space:nowrap}
.tablewrap table{min-width:640px}
@media (max-width:900px){
  .side{padding:12px 14px;border-right:0;border-bottom:1px solid var(--line)}
  .nav{display:flex;gap:4px;overflow-x:auto;-webkit-overflow-scrolling:touch;padding-bottom:4px}
  .nav a{white-space:nowrap;margin-bottom:0}
}
@media (max-width:560px){.g4{grid-template-columns:1fr 1fr}.g4 .card{padding:12px}.g4 .card b,.g4 .card .v{font-size:18px}}
.layout>*{min-width:0}
.flash.warn{background:#fff7ed;color:#9a3412;border-color:#fed7aa}[data-theme=dark] .flash.warn{background:#2a1a0c;color:#fdba74;border-color:#7c2d12}
.ferr{color:var(--bad);font-size:12px;margin-top:4px}.fhint{font-size:12px;margin-top:4px}input[aria-invalid=true]{border-color:var(--bad)}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
.nav .badge{margin-left:auto;background:var(--bad);color:#fff;border-radius:999px;font-size:11px;padding:0 7px;font-weight:700}