:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.5;
}
.wrap { max-width: 720px; margin: 10vh auto; padding: 0 1.25rem; }
h1 { margin: 0 0 .25rem; }
.muted { color: #888; }
pre {
  background: rgba(127, 127, 127, .12);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
}