:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --accent: #3b5bdb;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1c1c1e; --text: #f5f5f7; --muted: #a1a1a6; --line: #38383a; --accent: #8ea2f7; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 32px; }
header img { width: 56px; height: 56px; }
header a { color: inherit; text-decoration: none; font-weight: 600; font-size: 20px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 12px; }
h2 { font-size: 21px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
.lead { font-size: 20px; color: var(--muted); }
.muted { color: var(--muted); font-size: 15px; }
a { color: var(--accent); }
kbd { font: 15px -apple-system, BlinkMacSystemFont, sans-serif; border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; }
code { font: 15px ui-monospace, SFMono-Regular, Menlo, monospace; overflow-wrap: anywhere; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 15px; }
footer a { margin-right: 16px; }