body {
  font-family: Arial, sans-serif;
  text-align: center;
  margin: 20px;
}

h1 {
  background-color: orange;
  padding: 10px;
}

.container {
  margin: 20px;
}

input {
  width: 100px;
  padding: 5px;
  font-size: 16px;
  text-align: center;
  margin: 0 10px;
}

.arrow {
  font-size: 24px;
  margin: 0 20px;
}