:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #0f62fe;
  --success: #15803d;
  --warning: #b45309;
  --danger: #b91c1c;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); }
.app { max-width: 1180px; margin: 0 auto; padding: 18px; }
.topbar, .space-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.wrap { flex-wrap: wrap; }
.nav { display: flex; gap: 12px; flex-wrap: wrap; }
.nav a { text-decoration: none; color: var(--accent); font-weight: 700; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 18px; box-shadow: 0 8px 20px rgba(0,0,0,0.04); }
.narrow { max-width: 440px; margin: 40px auto; }
.grid { display: grid; gap: 16px; }
.cards-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.two-columns { grid-template-columns: 1.1fr 1fr; }
.brand-card { text-decoration: none; color: inherit; }
.money { font-size: 24px; font-weight: 700; }
.muted { color: var(--muted); }
.form-grid { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 14px; }
input, select, textarea, button { font: inherit; }
input, select, textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; }
button { border: 0; border-radius: 10px; padding: 11px 14px; background: var(--accent); color: white; font-weight: 700; cursor: pointer; }
button:hover { opacity: .95; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.status { display: inline-block; padding: 4px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; text-transform: uppercase; }
.status.active { background: #dcfce7; color: var(--success); }
.status.reserved { background: #fef3c7; color: var(--warning); }
.status.used { background: #fee2e2; color: var(--danger); }
.detail-grid { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin: 18px 0; }
.copy-row { display: flex; gap: 10px; }
.copy-row input { flex: 1; }
.barcode-wrap { margin-top: 18px; text-align: center; background: #fff; border: 1px dashed var(--border); border-radius: 16px; padding: 18px; }
.alert.error { background: #fee2e2; color: #991b1b; border-radius: 10px; padding: 10px 12px; margin-bottom: 12px; }
.inline-form { display: flex; gap: 8px; }
.footer { padding: 18px 0; text-align: center; color: var(--muted); }
@media (max-width: 860px) {
  .two-columns, .detail-grid { grid-template-columns: 1fr; }
}