:root {
  color-scheme: light dark;
  --text: #1d1d1f;
  --secondary: #6e6e73;
  --background: #ffffff;
  --rule: #d2d2d7;
  --link: #0066cc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #f5f5f7;
    --secondary: #a1a1a6;
    --background: #000000;
    --rule: #424245;
    --link: #2997ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 32px; }
nav { display: flex; justify-content: space-between; gap: 16px; font-size: 15px; margin-bottom: 40px; }
nav .name { font-weight: 600; color: var(--text); text-decoration: none; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 40px 0 8px; }
h3 { font-size: 17px; margin: 24px 0 4px; }
p, ul { margin: 8px 0; }
ul { padding-left: 1.3em; }
li { margin: 4px 0; }
a { color: var(--link); }
.lead { color: var(--secondary); margin-bottom: 24px; }
.meta { color: var(--secondary); font-size: 15px; }
footer {
  max-width: 680px; margin: 0 auto; padding: 24px 20px 48px;
  border-top: 1px solid var(--rule); color: var(--secondary); font-size: 13px;
}
footer a { color: var(--secondary); }