:root {
  --bg: #f8f9ff;
  --text: #181c22;
  --muted: #6b6c70;
  --line: #dfe2ec;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #131314; --text: #e5e2e3; --muted: #969086; --line: #353436; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 640px; margin: 0 auto; padding: 56px 24px 80px; }
h1 { font-size: 32px; line-height: 1.2; letter-spacing: -0.02em; font-weight: 600; margin: 16px 0 8px; }
h2 { font-size: 18px; font-weight: 600; margin: 36px 0 6px; }
p, li { color: var(--text); }
ul { padding-left: 20px; }
li { margin: 4px 0; }
a { color: inherit; text-underline-offset: 3px; text-decoration-color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 13px; margin-top: 40px; }
.lead { font-size: 18px; }
.icon { border-radius: 22px; display: block; }
.back { color: var(--muted); text-decoration: none; font-size: 14px; }
.links { margin-top: 28px; }