body {
  font-family: Arial, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.niveau {
  margin: 10px 0;
  padding: 10px;
  background-color: #f8f9fa;
  border-radius: 5px;
  border-left: 3px solid #007bff;
}

.titre-niveau {
  font-weight: bold;
  cursor: pointer;
  padding: 5px;
}

.enfants {
  margin-left: 20px;
  border-left: 1px dashed #ccc;
  padding-left: 10px;
}

.lien {
  display: flex;
  align-items: center;
  padding: 5px;
  margin: 3px 0;
  background-color: white;
  border-radius: 3px;
}

.titre-lien {
  flex-grow: 1;
  margin-right: 10px;
}

.actions-lien i {
  margin-left: 8px;
  cursor: pointer;
}

.actions-niveau {
  margin-top: 10px;
}

.actions-niveau button {
  padding: 5px 10px;
  margin-right: 5px;
  background-color: #e9ecef;
  border: none;
  border-radius: 3px;
  cursor: pointer;
}