:root {
  color-scheme: light dark;
}

article {
  margin: 2em;
  max-width: 72ch;
}

p {
  line-height: 1.3;
}

.timestamp,
footer a {
  color: light-dark(#676767, #aaa);
  font: smaller system-ui;
  text-decoration: none;
}

a.timestamp:hover,
footer a:hover {
  color: inherit;
}

footer {
  margin: 2em;
}