body { background-color: #f4f6f9; }
.card { border: none; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.stat-card h2 { font-weight: 700; }
.table thead th { background-color: #f1f3f5; }

@media print {
  .navbar, nav.bg-light, .btn, .nav-tabs, form, .alert, a.btn { display: none !important; }
  body { background: #fff; }
  main { padding: 0 !important; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}