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

h1 {
  text-align: center;
  margin-bottom: 20px;
}

form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

#output {
  margin-top: 20px;
  text-align: center;
}