body {
  background-color: #f7f3f0;
  font-family: 'Segoe UI', sans-serif;
}

header {
  background-image: url('https://source.unsplash.com/1600x400/?cosmic,stars');
  background-size: cover;
  background-position: center;
}

#result {
  font-size: 1.2rem;
}