:root {
  color-scheme: dark;
}

body {
  background-color: #0d0d0d;
  color: #c8c8c8;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 24px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1 {
  text-align: center;
}

a.back {
  display: block;
  margin-top: 32px;
}

footer {
  text-align: center;
  font-size: 12px;
  color: #666;
  margin-top: auto;
}