:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0; padding: 3rem 1.25rem;
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #111; background: #fff;
}
main { max-width: 46rem; margin: 0 auto; }
h1 { font-size: 2rem; margin: 0 0 .25rem; letter-spacing: -0.02em; }
h2 { font-size: 1.15rem; margin: 2rem 0 .5rem; }
.lead { font-size: 1.1rem; color: #444; }
ul { padding-left: 1.1rem; }
li { margin: .35rem 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; background: rgba(127,127,127,.14); padding: .1em .35em; border-radius: 4px; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
@media (prefers-color-scheme: dark) {
  body { color: #e7e7e7; background: #0b0b0c; }
  .lead { color: #b3b3b3; }
  a { color: #6ea8fe; }
}