body {
  color: #111;
  background: #eee;
}
a{
    color: #2222ff;
  }

.spec {
    color: #111
  }

@media (prefers-color-scheme: dark) {
  body {
    color: #eee;
    background: #111;
  }
  body a {
    color: #8888ff;
  }
  .spec {
    color: #eee
  }
}