body {
  background: #f8f9fa;
}

.navbar {
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.drop-zone {
  border: 2px dashed #adb5bd;
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: #0d6efd;
  background: #f0f4ff;
}

.card {
  border-radius: 8px;
}

.table td, .table th {
  vertical-align: middle;
}

.badge {
  font-size: 0.75rem;
}