:root {
  --bg: #f6f7f5;
  --card: #ffffff;
  --text: #16201c;
  --muted: #5b6b64;
  --brand: #29856a;
  --line: #e2e7e4;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101513;
    --card: #19211e;
    --text: #e9efec;
    --muted: #9db0a8;
    --brand: #4fb894;
    --line: #26312d;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 56px; height: 56px; border-radius: 13px; }
header a { color: inherit; text-decoration: none; font-weight: 700; font-size: 22px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 21px; margin: 32px 0 10px; }
p, li { color: var(--text); }
.lead { font-size: 19px; color: var(--muted); margin-top: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px 22px; margin: 18px 0; }
.card ol, .card ul { margin: 0; padding-left: 22px; }
.card li + li { margin-top: 8px; }
a { color: var(--brand); }
.muted { color: var(--muted); font-size: 15px; }
footer { margin-top: 48px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; display: flex; gap: 18px; flex-wrap: wrap; }
footer a { color: var(--muted); }