:root {
  --bg: #ffffff; --fg: #1d1d1f; --muted: #6e6e73; --accent: #0a84ff; --card: #f5f5f7; --line: #d2d2d7;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000000; --fg: #f5f5f7; --muted: #a1a1a6; --accent: #409cff; --card: #1c1c1e; --line: #38383a; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 20px; flex-wrap: wrap; }
header a.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
header a.brand img { width: 32px; height: 32px; object-fit: contain; }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; }
nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }
a { color: var(--accent); }
h1 { font-size: 34px; line-height: 1.15; margin: 36px 0 12px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
p.lead { font-size: 20px; color: var(--muted); }
.card { background: var(--card); border-radius: 14px; padding: 16px 18px; margin: 12px 0; }
details { background: var(--card); border-radius: 12px; padding: 12px 16px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; }
code { font-family: ui-monospace, Menlo, monospace; font-size: 15px; }
ul { padding-left: 22px; }
footer { color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; padding-bottom: 32px; }