a[href]:not(:where(
[href^="#"],
[href^="/"]:not([href^="//"]),
[href^=".."],
[href*="//bouvier.cc"],
[href*="//127.0.0.1"],
[href*="//localhost"],
[href*="mailto:"],
))::after {
  font-size: var(--step-s1);
  content: " ↗";
  vertical-align: middle;
}