:root {
  --bg: #fbfaf7;
  --fg: #1d1f21;
  --muted: #5d6166;
  --line: #e4e1da;
  --accent: #2f5d50;
  --max: 42rem;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #141617; --fg: #e8e6e1; --muted: #a2a6aa; --line: #2b2f31; --accent: #8fc3b0; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
main, header, footer { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
header { padding-top: 2.5rem; }
header a.brand { color: var(--fg); text-decoration: none; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: 2.1rem; line-height: 1.2; margin: 2.5rem 0 0.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.2rem; margin: 2.2rem 0 0.4rem; }
p, li { color: var(--fg); }
.lead { color: var(--muted); font-size: 1.15rem; margin-top: 0; }
a { color: var(--accent); }
ul { padding-left: 1.2rem; }
footer { margin-top: 4rem; padding-bottom: 2.5rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
footer a { color: var(--muted); }
footer nav a { margin-right: 1rem; }
.updated { color: var(--muted); font-size: 0.9rem; }