.folder {
  margin: 1em 0;
  border: 1px solid #ccc;
  background: #f9f9f9;
}

.folder-header {
  padding: 0.5em;
  background: #eee;
  border-bottom: 1px solid #ccc;
  font-weight: bold;
}

.folder-body {
  padding: 0.5em;
}