@media (prefers-color-scheme: dark) {
  body {
    background-color: #1c1c1c;
    color: #ccc;
  }

  .card {
    background-color: #282828;
    color: #ccc;
  }

  .page-link {
    background-color: #282828;
    border-color: #555;
  }

  .jumbotron {
    background-color: #282828;
  }
}