:root{--bg:#f6f7fb;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--brand:#4f46e5;--brand2:#4338ca;--ok:#059669;--warn:#d97706;--bad:#dc2626;--r:14px;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*{box-sizing:border-box}html,body{margin:0}body{font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--brand)}h1{font-size:26px;margin:.2em 0 .6em}h2{font-size:20px}h3{font-size:16px;margin:.2em 0 .6em}
code,.mono{font-family:var(--mono);font-size:.92em}code{background:#eef2ff;padding:1px 6px;border-radius:6px}.break{word-break:break-all}
.top{display:flex;justify-content:space-between;align-items:center;padding:14px 28px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top nav{display:flex;gap:18px;align-items:center}.top nav a{color:var(--ink);text-decoration:none}
.logo{font-weight:800;font-size:19px;color:var(--ink)!important;text-decoration:none;display:flex;gap:8px;align-items:center}.mark{color:var(--brand);font-size:22px}
.wrap{max-width:1100px;margin:28px auto;padding:0 20px}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:10px 18px;font-weight:600;cursor:pointer;text-decoration:none;font-size:15px}
.btn:hover{background:var(--brand2)}.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}.btn.sm{padding:6px 12px;font-size:13px}.btn.lg{padding:14px 24px;font-size:16px}.btn.wide{width:100%}
button.link{background:none;border:0;color:var(--brand);cursor:pointer;padding:0;font:inherit}button.link.danger,.danger{color:var(--bad)}form.inline{display:inline}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-bottom:18px;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.card.narrow{max-width:420px;margin:40px auto}.card.highlight{border-color:var(--brand);background:#eef2ff}.center{text-align:center}
label{display:block;margin:0 0 12px;font-weight:500;font-size:14px}label.check{display:flex;gap:8px;align-items:flex-start;font-weight:400}label.inline-l{display:flex;gap:8px;align-items:center;margin:0}
input,select{display:block;width:100%;margin-top:4px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}
input[type=checkbox]{width:auto;margin-top:4px}.w80{width:80px}.w120{width:120px}
.flash{padding:10px 14px;border-radius:10px;margin-bottom:16px}.flash.ok{background:#ecfdf5;color:#065f46}.flash.err{background:#fef2f2;color:#991b1b}
.muted{color:var(--muted)}.small{font-size:13px}.note{background:#fffbeb;border:1px solid #fde68a;padding:8px 12px;border-radius:10px;font-size:14px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.between{justify-content:space-between}.row .grow{flex:1;min-width:240px}.row input{margin:0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}
.formgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;align-items:end;margin-top:12px}.formgrid .span2{grid-column:span 2}.formgrid label{margin:0}
.panel{display:grid;grid-template-columns:210px 1fr;min-height:calc(100vh - 60px)}
.side{background:#fff;border-right:1px solid var(--line);padding:20px 12px;display:flex;flex-direction:column;gap:2px}
.side a{padding:9px 12px;border-radius:9px;color:var(--ink);text-decoration:none}.side a.on,.side a:hover{background:#eef2ff;color:var(--brand)}
.main{padding:26px 32px;max-width:1180px}
.tbl{width:100%;border-collapse:collapse;font-size:14px}.tbl th{text-align:left;color:var(--muted);font-weight:500;border-bottom:1px solid var(--line);padding:8px}.tbl td{border-bottom:1px solid var(--line);padding:9px 8px;vertical-align:top}
tr.dim td{opacity:.5}
.tag{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600;background:#e2e8f0;color:#334155}
.tag.paid,.tag.success{background:#d1fae5;color:#065f46}.tag.pending,.tag.partial{background:#fef3c7;color:#92400e}.tag.new{background:#e0e7ff;color:#3730a3}
.tag.expired,.tag.cancelled{background:#f1f5f9;color:#64748b}.tag.underpaid,.tag.failed,.tag.error{background:#fee2e2;color:#991b1b}.tag.late,.tag.over,.tag.warning{background:#ffedd5;color:#9a3412}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px}.stat b{display:block;font-size:22px}.stat span{color:var(--muted);font-size:13px}
.steps ol{margin:0;padding-left:20px}.steps li{margin:6px 0}.steps li.done{color:var(--muted);text-decoration:line-through}
.filters{display:flex;gap:6px;margin:0 0 12px;flex-wrap:wrap}.filters a{padding:5px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:13px}.filters a.on{background:var(--brand);color:#fff;border-color:var(--brand)}
details summary{cursor:pointer}.kv{display:grid;grid-template-columns:130px 1fr;gap:8px 12px;margin:0 0 14px}.kv dt{color:var(--muted)}.kv dd{margin:0}
.big{font-size:17px}.small-h{font-size:18px}.copy{border:1px solid var(--line);background:#fff;border-radius:7px;font-size:12px;padding:2px 8px;cursor:pointer;color:var(--brand)}.copy.done{color:var(--ok)}
pre.code{background:#0f172a;color:#e2e8f0;padding:14px;border-radius:10px;overflow:auto;font-size:13px}.prose{max-width:900px}
.foot{text-align:center;color:var(--muted);font-size:13px;padding:28px}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;align-items:center;padding:30px 0}.hero h1{font-size:44px;line-height:1.1}.hero em{color:var(--brand);font-style:normal}.lead{font-size:18px;color:#334155}
.pill{display:inline-block;background:#eef2ff;color:var(--brand);padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600}.cta{display:flex;gap:12px;margin:20px 0}
.ticks{padding-left:18px;color:#334155}.hero-card .mock{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 20px 40px rgba(79,70,229,.12)}
.mock-h{display:flex;justify-content:space-between;font-weight:600}.mock-amt{font-size:30px;font-weight:700;margin:14px 0 2px;font-family:var(--mono)}.mock-amt small{font-size:14px;color:var(--muted)}
.mock-qr{width:150px;height:150px;margin:16px auto;background:repeating-conic-gradient(#0f172a 0 25%,#fff 0 50%) 0 0/20px 20px;border-radius:6px;border:8px solid #fff;outline:1px solid var(--line)}
.mock code{display:block;text-align:center;word-break:break-all}
body.checkout{background:linear-gradient(160deg,#eef2ff,#f6f7fb)}.checkout .wrap{max-width:520px}
.pay{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 20px 40px rgba(15,23,42,.08)}
.pay-h{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:14px}.merchant{font-weight:700;font-size:18px}.fiat{font-weight:700;font-size:18px}.right{text-align:right}
.amt{text-align:center;font-size:26px;font-weight:700;margin:8px 0}.qr{display:block;margin:12px auto;border-radius:10px;border:1px solid var(--line)}
.addr{text-align:center;background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:10px;font-size:14px}.timer{text-align:center;margin-top:14px;color:var(--muted)}
.spinner{width:42px;height:42px;border:4px solid #e0e7ff;border-top-color:var(--brand);border-radius:50%;margin:20px auto;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.big-ok{font-size:54px;color:var(--ok)}.foot-note{margin-top:20px}
[hidden]{display:none!important}
@media(max-width:860px){.hero,.grid2,.grid3,.formgrid,.stats{grid-template-columns:1fr}.panel{grid-template-columns:1fr}.side{flex-direction:row;overflow:auto}.formgrid .span2{grid-column:auto}.main{padding:18px}}