:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --text: #1b2230;
  --muted: #667085;
  --border: #d9dee7;
  --accent: #2554d8;
  --accent-hover: #1c43b0;
  --danger: #c62828;
  --ok: #1e7d43;
  --warn: #a86400;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --surface: #1a1f29;
    --text: #e6e9ef;
    --muted: #98a2b3;
    --border: #2f3746;
    --accent: #5b8cff;
    --accent-hover: #7aa2ff;
    --danger: #ef6b6b;
    --ok: #4cc27a;
    --warn: #e0a53c;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
code { font-family: ui-monospace, Menlo, Consolas, monospace; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; text-align: right; }

.card {
  max-width: 520px;
  margin: 48px auto;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.card.narrow { max-width: 400px; }
@media (max-width: 560px) { .card { margin: 16px; padding: 20px; } }

label { display: block; margin: 16px 0 6px; font-weight: 600; font-size: .95rem; }
.req { color: var(--danger); }
input, select {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
input.invalid { border-color: var(--danger); }
small.err { color: var(--danger); display: block; margin-top: 4px; }

fieldset.more {
  margin: 24px 0 0;
  padding: 4px 16px 16px;
  border: 1px dashed var(--border);
  border-radius: 8px;
}
fieldset.more legend { padding: 0 6px; font-weight: 600; color: var(--accent); }
.row { display: grid; grid-template-columns: 1fr 2fr; gap: 12px; }
.row > div { min-width: 0; }
@media (max-width: 480px) { .row { grid-template-columns: 1fr; gap: 0; } }

button, .button {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 20px;
  width: 100%;
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
button:hover, .button:hover { background: var(--accent-hover); }
button.link { width: auto; margin: 0 0 0 12px; padding: 0; background: none; color: var(--accent); }

.alert { padding: 12px 14px; border-radius: 8px; margin: 16px 0; }
.alert.error { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); }

.badge {
  width: 56px; height: 56px; margin: 0 auto 12px;
  display: grid; place-items: center;
  font-size: 1.6rem; border-radius: 50%;
  background: color-mix(in srgb, var(--muted) 15%, transparent);
}
.badge.paid { color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }
.badge.failed, .badge.error { color: var(--danger); background: color-mix(in srgb, var(--danger) 15%, transparent); }
.badge.pending { color: var(--warn); background: color-mix(in srgb, var(--warn) 15%, transparent); }

/* Admin */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
}
form.inline { display: flex; align-items: center; }
.wide { padding: 24px; max-width: 1400px; margin: 0 auto; }
@media (max-width: 560px) { .wide { padding: 16px; } .topbar { padding: 12px 16px; } }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; display: flex; flex-direction: column; }
.stat .label { text-transform: capitalize; color: var(--muted); font-size: .85rem; }
.stat .value { font-size: 1.6rem; font-weight: 700; font-variant-numeric: tabular-nums; }

.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.filters input { flex: 1 1 260px; width: auto; }
.filters select { flex: 0 1 180px; width: auto; }
.filters button { margin: 0; width: auto; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); background: var(--bg); }
tbody tr:last-child td { border-bottom: 0; }

.pill { padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 600; text-transform: capitalize; }
.pill.paid { color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }
.pill.pending { color: var(--warn); background: color-mix(in srgb, var(--warn) 15%, transparent); }
.pill.failed { color: var(--danger); background: color-mix(in srgb, var(--danger) 15%, transparent); }
.pill.cancelled { color: var(--muted); background: color-mix(in srgb, var(--muted) 15%, transparent); }

.pager { display: flex; gap: 16px; justify-content: center; align-items: center; margin: 20px 0; }
.pager a { color: var(--accent); text-decoration: none; }