body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background-color: #f4f4f4;
}

.container {
  max-width: 400px;
  margin: 0 auto;
  background: white;
  padding: 20px;
  border-radius: 8px;
}

#itemList {
  list-style: none;
  padding: 0;
}

#itemList li {
  padding: 12px;
  background-color: #f9f9f9;
  margin-bottom: 8px;
  border-radius: 4px;
  border-left: 4px solid #4CAF50;
}