:root {
  --primary-color: #0d6efd;
  --secondary-color: #6c757d;
  --success-color: #198754;
  --danger-color: #dc3545;
  --light-bg: #f8f9fa;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

.card {
  border-radius: 0.5rem;
}

.table th {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.025em;
}

.navbar-brand {
  font-size: 1.25rem;
}

@media (max-width: 576px) {
  .table {
    font-size: 0.875rem;
  }
  
  .btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
  }
}

/* Print styles for invoices */
@media print {
  .navbar, footer, .btn {
    display: none !important;
  }
  
  .card {
    border: none !important;
    box-shadow: none !important;
  }
  
  body {
    background: white !important;
  }
}