body {
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
}

#counter {
  font-size: 1.5rem;
  margin: 1rem 0;
}

button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
}