:root {
  --bg: #ffffff; --fg: #1c1c1e; --muted: #6b6b70;
  --rule: #e5e5ea; --accent: #2f6f4f; --card: #f6f7f6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121213; --fg: #ececee; --muted: #9a9aa0;
    --rule: #2c2c2e; --accent: #7fc9a3; --card: #1b1c1b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 3rem 1.25rem 5rem;
  background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 44rem; margin: 0 auto; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .35rem; letter-spacing: -.02em; }
h2 { font-size: 1.15rem; margin: 2.4rem 0 .6rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; margin: 1.6rem 0 .3rem; }
.updated, .tagline { color: var(--muted); font-size: .9rem; margin: 0 0 2rem; }
.tagline { font-size: 1.05rem; }
.lede {
  background: var(--card); border-left: 3px solid var(--accent);
  padding: 1rem 1.1rem; border-radius: 0 8px 8px 0; margin: 0 0 1rem;
}
ul { padding-left: 1.15rem; }
li { margin: .35rem 0; }
a { color: var(--accent); }
hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0 1.25rem; }
nav { margin-bottom: 2.5rem; font-size: .92rem; }
nav a { margin-right: 1.1rem; }
footer { color: var(--muted); font-size: .88rem; }
code { font-size: .92em; background: var(--card); padding: .1em .35em; border-radius: 4px; }