:root {
  --ink: #1d2622;
  --muted: #5b6862;
  --ground: #f6f3ee;
  --card: #ffffff;
  --line: #e2ddd4;
  --accent: #1f5c4a;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8ece9;
    --muted: #9aa7a1;
    --ground: #111714;
    --card: #19211d;
    --line: #2a322e;
    --accent: #6bc1a5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 56px 20px 80px; }
header { display: flex; align-items: center; gap: 16px; margin-bottom: 32px; }
header img { width: 64px; height: 64px; }
h1 { margin: 0; font-size: 34px; line-height: 1.15; }
h2 { margin: 40px 0 8px; font-size: 21px; }
h3 { margin: 24px 0 4px; font-size: 17px; }
code { overflow-wrap: anywhere; }
.lead { font-size: 20px; color: var(--muted); margin-top: 0; }
a { color: var(--accent); }
section.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 24px; margin-top: 40px; }
.card > :first-child { margin-top: 0; }
footer { margin-top: 48px; color: var(--muted); font-size: 15px; }