:root {
  --bg: #f6f7f9; --card: #ffffff; --text: #1b1f24; --muted: #5f6b7a; --line: #e3e7ec;
  --accent: #1f6feb; --accent-ink: #ffffff; --ok: #1a7f37; --warn: #9a6700; --bad: #cf222e;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--text); background: var(--bg); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 24px 0 8px; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }
.wrap { max-width: 1100px; margin: 0 auto; padding: 24px 20px; }
.narrow { max-width: 560px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; margin-bottom: 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.stat { padding: 16px; }
.stat .n { font-size: 26px; font-weight: 600; }
.stat .l { color: var(--muted); font-size: 13px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.pos { color: var(--ok); } .neg { color: var(--bad); }
.tag { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; background: #eef1f5; color: var(--muted); }
.tag.open, .tag.partial, .tag.pending, .tag.unmatched { background: #fff3cd; color: var(--warn); }
.tag.paid, .tag.matched, .tag.delivered, .tag.captured { background: #dafbe1; color: var(--ok); }
.tag.failed, .tag.cancelled, .tag.expired { background: #ffebe9; color: var(--bad); }
.tag.ignored, .tag.released { background: #eef1f5; }
button, .btn { font: inherit; border: 1px solid var(--line); background: #fff; color: var(--text); padding: 7px 14px; border-radius: 8px; cursor: pointer; }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
button.small { padding: 3px 10px; font-size: 13px; }
input, select, textarea { font: inherit; padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; width: 100%; background: #fff; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
form.inline { display: inline; }
form.inline input, form.inline select { width: auto; display: inline-block; }
.row { display: flex; gap: 10px; align-items: end; flex-wrap: wrap; }
.row > * { flex: 1; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: #dafbe1; color: var(--ok); }
.flash.warn { background: #fff3cd; color: var(--warn); }
nav.admin { background: #fff; border-bottom: 1px solid var(--line); }
nav.admin .wrap { display: flex; gap: 18px; align-items: center; padding: 12px 20px; }
nav.admin .brand { font-weight: 600; margin-right: auto; }
nav.admin a { color: var(--text); }
pre.key { background: #f6f8fa; padding: 12px; border-radius: 8px; overflow-x: auto; font-size: 13px; }

/* payer page */
.pay { max-width: 520px; margin: 0 auto; padding: 32px 20px; }
.pay .amount { font-size: 40px; font-weight: 700; letter-spacing: -0.5px; }
.pay .detail { display: grid; grid-template-columns: 120px 1fr; gap: 6px 12px; margin: 16px 0; font-size: 15px; }
.pay .detail dt { color: var(--muted); }
.pay .detail dd { margin: 0; font-family: var(--mono); font-size: 15px; word-break: break-all; }
.pay .ref { font-family: var(--mono); font-size: 22px; font-weight: 700; letter-spacing: 1px; background: #fff3cd; padding: 6px 12px; border-radius: 8px; display: inline-block; }
.pay .qr { text-align: center; padding: 8px 0 0; }
.pay .qr img { width: 220px; height: 220px; image-rendering: pixelated; }
.pay .status { padding: 12px 16px; border-radius: 10px; background: #eef1f5; text-align: center; }
.pay .status.paid { background: #dafbe1; color: var(--ok); font-weight: 600; }
.pay .status.partial { background: #fff3cd; color: var(--warn); }
.copy { font-size: 12px; margin-left: 6px; padding: 1px 8px; }
.steps { padding-left: 18px; color: var(--muted); font-size: 14px; }
.steps li { margin: 4px 0; }
footer.pay-foot { text-align: center; color: var(--muted); font-size: 12px; margin-top: 24px; }