body {
  background-color: #f8f9fa;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.navbar-brand {
  font-weight: 600;
}

.navbar-brand i {
  color: #f7931a;
}

.nav-tabs .nav-link {
  color: #6c757d;
  border: none;
  padding: 0.75rem 1.5rem;
}

.nav-tabs .nav-link.active {
  color: #0d6efd;
  border-bottom: 3px solid #0d6efd;
  background: transparent;
}

.nav-tabs .nav-link:hover:not(.active) {
  border-bottom: 3px solid #dee2e6;
}

.card {
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  border-radius: 0.5rem;
}

.card-header {
  font-weight: 600;
  border-radius: 0.5rem 0.5rem 0 0 !important;
}

.stat-card {
  padding: 1rem;
  text-align: center;
  background: #f8f9fa;
  border-radius: 0.5rem;
  height: 100%;
}

.stat-label {
  font-size: 0.75rem;
  color: #6c757d;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.25rem;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 600;
}

.table {
  margin-bottom: 0;
}

.table th {
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #6c757d;
  border-bottom: 2px solid #dee2e6;
}

.table td {
  vertical-align: middle;
}

.table-hover tbody tr:hover {
  background-color: rgba(13, 110, 253, 0.05);
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.modal-content {
  border-radius: 0.5rem;
}

.modal-header {
  background: #f8f9fa;
  border-radius: 0.5rem 0.5rem 0 0;
}

@media (max-width: 768px) {
  .stat-card {
    margin-bottom: 1rem;
  }

  .card-header .d-flex {
    flex-direction: column;
    gap: 0.5rem !important;
  }

  .nav-tabs .nav-link {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }
}