:root {
  --bg: #f4f6fb;
  --card: #fff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #2563eb;
  --danger: #dc2626;
  --ok: #16a34a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}
.hidden { display: none !important; }
.center-card {
  max-width: 460px;
  margin: 8vh auto;
  background: var(--card);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .06);
}
h1, h2 { margin: 0 0 8px; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); min-height: 18px; }
.form { display: grid; gap: 12px; margin-top: 18px; }
label { display: grid; gap: 5px; font-size: 13px; color: var(--muted); }
input, select, button {
  font: inherit;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--text);
}
button {
  background: var(--primary);
  color: #fff;
  border: 0;
  cursor: pointer;
  font-weight: 600;
}
button:hover { filter: brightness(.95); }
button.ghost { background: transparent; color: var(--primary); border: 1px solid var(--line); }
button.danger { background: var(--danger); }
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 22px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  gap: 12px;
}
header .row { display: flex; align-items: center; gap: 10px; }
.tabs {
  display: flex;
  gap: 6px;
  padding: 12px 22px 0;
  flex-wrap: wrap;
}
.tabs button {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  padding: 8px 14px;
}
.tabs button.active { color: var(--primary); border-color: var(--line); background: var(--card); }
main { padding: 18px 22px 40px; }
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
.panel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 12px; flex-wrap: wrap; }
.grid-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
  align-items: end;
  margin-bottom: 14px;
}
label.check { display: flex; align-items: center; gap: 6px; }
label.check input { width: auto; }
.table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { background: #f8fafc; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.result {
  background: #0f172a;
  color: #e2e8f0;
  padding: 12px;
  border-radius: 8px;
  overflow: auto;
  max-height: 240px;
  font-size: 12px;
}
details { margin: 10px 0; }
summary { cursor: pointer; color: var(--primary); font-weight: 600; margin-bottom: 8px; }
.badge { display: inline-block; padding: 2px 7px; border-radius: 999px; background: #e0e7ff; color: #3730a3; font-size: 11px; }
.badge.revoked, .badge.returned { background: #fee2e2; color: #991b1b; }
.badge.active { background: #dcfce7; color: #166534; }
.badge.sold_unactivated { background: #fef3c7; color: #92400e; }
@media (max-width: 640px) {
  .center-card { margin: 20px; padding: 20px; }
  main, .tabs { padding-left: 12px; padding-right: 12px; }
}