:root{
  --bg:#ffffff;--fg:#111111;--muted:#6b6b6b;--line:#e6e6e6;--soft:#f6f6f6;--accent:#1f3a5f;
  --radius:14px;--font:Inter,"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f0f10;--fg:#f2f2f2;--muted:#9a9a9a;--line:#262628;--soft:#161618;--accent:#8fb3e6}
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--fg);font:400 15.5px/1.6 var(--font);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:740px;margin:0 auto;padding:28px 20px 80px}
.top{display:flex;align-items:center;justify-content:space-between;height:56px;max-width:740px;margin:0 auto;padding:0 20px}
.brand{font-weight:600;letter-spacing:.2px;display:flex;align-items:center;gap:10px;color:var(--fg)}
.brand img{height:26px;width:auto}
.top nav{display:flex;gap:18px;font-size:14px}
.top nav a{color:var(--muted)}
.top nav a.on{color:var(--fg)}
h1{font-size:28px;font-weight:600;line-height:1.25;margin:28px 0 22px}
h2{font-size:17px;font-weight:600;margin:28px 0 10px}
.sub{color:var(--muted);font-size:13px}
label{display:block;font-size:13px;color:var(--muted);margin:16px 0 6px}
input,select,textarea{width:100%;font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:11px 14px;outline:none;transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 14%,transparent)}
textarea{min-height:74px;resize:vertical}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.row3{display:grid;grid-template-columns:2fr 1fr 1fr;gap:14px}
@media (max-width:560px){.row,.row3{grid-template-columns:1fr}}
.seg{display:flex;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.seg label{margin:0;flex:1}
.seg input{display:none}
.seg span{display:block;text-align:center;padding:10px 8px;cursor:pointer;color:var(--muted);font-size:14.5px}
.seg input:checked+span{background:var(--fg);color:var(--bg)}
.btn{white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 15px var(--font);padding:12px 20px;border-radius:12px;border:1px solid var(--fg);background:var(--fg);color:var(--bg);cursor:pointer;transition:opacity .15s}
.btn:hover{opacity:.88}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.sm{padding:8px 14px;font-size:13.5px}
.btn.block{width:100%}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:14px 0}
.kv{display:grid;grid-template-columns:150px 1fr;gap:6px 14px;font-size:15px}
.kv div:nth-child(odd){color:var(--muted)}
@media (max-width:560px){.kv{grid-template-columns:1fr}.kv div:nth-child(odd){margin-top:8px;font-size:13px}}
.total{font-size:30px;font-weight:600;font-variant-numeric:tabular-nums;margin:6px 0 2px}
.qrbox{text-align:center;padding:10px 0 4px}
.qrbox img,.qrbox svg{width:240px;height:240px;border-radius:12px;background:#fff;padding:8px}
.status{display:inline-block;font-size:13px;padding:4px 10px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.status.paid{border-color:transparent;background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent)}
.linkbox{display:flex;gap:8px;align-items:center}
.linkbox input{font-size:13.5px;color:var(--muted)}
.methods{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 0}
.methods span{font-size:12.5px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:3px 10px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-weight:600;color:var(--muted);font-size:12.5px}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap}
.tablewrap{overflow-x:auto}
.foot{color:var(--muted);font-size:12.5px;margin-top:40px;line-height:1.7}
.hide{display:none}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:10px 16px;border-radius:999px;font-size:13.5px;opacity:0;transition:opacity .2s;pointer-events:none}
.toast.show{opacity:1}
.demo{font-size:12px;color:var(--muted);border:1px dashed var(--line);border-radius:999px;padding:2px 10px}
@media print{.top,.actions,.noprint{display:none}.wrap{padding:0}.card{break-inside:avoid}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}