:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c2230;
  --line: #262d3a;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #f7931a;
  --ok: #2ea043;
  --err: #da3633;
  --warn: #d29922;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); }
h1 { font-size: 26px; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 0 0 10px; }
.muted { color: var(--muted); }
.small { font-size: 15px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.wrap { max-width: 560px; margin: 0 auto; padding: 20px 16px 48px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px; margin-bottom: 16px;
}

label { display: block; margin: 14px 0 0; font-size: 16px; color: var(--muted); }
input, select, button { font: inherit; }
input, select {
  width: 100%; margin-top: 6px; padding: 12px 12px; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px;
}
.row { display: flex; gap: 10px; align-items: flex-end; }
.row > * { flex: 1; }

.btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 16px; cursor: pointer;
}
.btn.primary { background: var(--accent); color: #1a1206; border-color: var(--accent); font-weight: 700; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.small { padding: 8px 12px; font-size: 15px; }

.amounts { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.chip {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 14px; cursor: pointer; font-size: 16px;
}
.chip:hover { border-color: #3a4353; }

.alert { padding: 12px 14px; border-radius: 10px; font-size: 16px; margin-top: 14px; }
.alert.error { background: #2d1416; border: 1px solid #5c2225; color: #ffb4ae; }
.alert.ok { background: #10251a; border: 1px solid #1f5a34; color: #a5e8bd; }
.alert.info { background: #101a2b; border: 1px solid #22385c; color: #b8d0f0; }

.badge {
  display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 15px;
  background: var(--panel-2); border: 1px solid var(--line); color: var(--muted);
}
.badge.ok { color: #a5e8bd; border-color: #1f5a34; }
.badge.warn { color: #f0cf87; border-color: #5c4a1f; }

.qr { display: grid; place-items: center; margin: 16px 0 8px; }
.qr img, .qr canvas { background: #fff; padding: 10px; border-radius: 12px; }

.invoice {
  word-break: break-all; background: #0b0f14; border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 15px; line-height: 1.5; max-height: 180px; overflow: auto;
}

.kv { display: grid; grid-template-columns: minmax(140px, auto) 1fr; gap: 8px 18px; font-size: 16px; margin: 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

table { width: 100%; border-collapse: collapse; font-size: 17px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 500; white-space: nowrap; }

@media (max-width: 640px) {
  h1 { font-size: 23px; }
  .wrap { padding: 16px 12px 40px; }
  .card { padding: 14px 12px; }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dd { margin-bottom: 10px; }
  /* 表格改卡片式堆叠，不横滑 */
  table.stack thead { display: none; }
  table.stack tr {
    display: block; border: 1px solid var(--line); border-radius: 10px;
    padding: 10px 12px; margin-bottom: 10px; background: var(--panel-2);
  }
  table.stack td {
    display: flex; justify-content: space-between; align-items: baseline;
    gap: 12px; border: 0; padding: 5px 0;
  }
  table.stack td::before { content: attr(data-label); color: var(--muted); font-size: 15px; }
  .btn { padding: 13px 16px; }
}