body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background: #f7f7f7;
}

#lists-container {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
}

ol {
  padding: 10px 20px;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #fff;
  transition: background-color 0.3s;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: #4a90e2;
  color: white;
  transition: background 0.2s;
}

button:hover {
  background: #357ab8;
}