:root {
  color-scheme: light dark;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
main.narrow { max-width: 520px; padding-top: 64px; }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
p, li { color: var(--ink-2); }
b, strong { color: var(--ink); }
a { color: var(--accent); }
code {
  font: 14px ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  overflow-wrap: anywhere;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 20px;
  margin: 16px 0;
}
.muted { font-size: 14px; }
ol li { margin: 6px 0; }