:root {
  --bg: #fafaf9; --fg: #1c1917; --muted: #57534e; --link: #1d4ed8; --rule: #e7e5e4; --code: #f0efed;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #171615; --fg: #f5f5f4; --muted: #a8a29e; --link: #93b4fd; --rule: #2e2c2a; --code: #26241f; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-inline: 20px;
}
main { max-width: 680px; margin: 0 auto; padding-block: 64px 32px; }
h1 { font-size: 2.2rem; line-height: 1.2; margin: 0 0 16px; letter-spacing: -0.02em; }
h2 { font-size: 1.15rem; margin: 36px 0 8px; }
.lead { font-size: 1.15rem; }
.meta { color: var(--muted); margin-top: -8px; }
a { color: var(--link); }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
ul { padding-left: 1.2em; }
footer {
  max-width: 680px; margin: 0 auto; padding-block: 20px 48px;
  border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.9rem;
}