:root {
  --bg: #f8f7f4;
  --surface: #ffffff;
  --ink: #1c1917;
  --muted: #6b645d;
  --hairline: #e9e6e0;
  --accent: #2a6fe8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0d12;
    --surface: #141921;
    --ink: #f1f5f9;
    --muted: #a3acb9;
    --hairline: #252c38;
    --accent: #6fa5ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header img { width: 44px; height: 44px; }
header a { font-size: 26px; font-weight: 800; color: var(--ink); text-decoration: none; letter-spacing: -0.02em; }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 12px; text-wrap: balance; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { color: var(--ink); }
.lead { color: var(--muted); font-size: 18px; margin-top: 0; }
.card { background: var(--surface); border: 1px solid var(--hairline); border-radius: 20px; padding: 20px 22px; margin: 20px 0; }
a { color: var(--accent); }
footer { color: var(--muted); font-size: 14px; margin-top: 40px; border-top: 1px solid var(--hairline); padding-top: 16px; }
ul { padding-left: 22px; }