:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #14202e;
  --muted: #5a6676;
  --line: #dfe3e9;
  --accent: #1f4fa8;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141b;
    --surface: #161d27;
    --ink: #e6ebf2;
    --muted: #9ba6b6;
    --line: #2a3442;
    --accent: #8fb0ff;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 40px 20px 56px; }
header.site { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 8px 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line); margin-bottom: 32px; }
.brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--muted); font-weight: 400; }
nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 14px; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { color: var(--ink); }
.lead { font-size: 18px; color: var(--muted); margin-top: 0; }
.meta { color: var(--muted); font-size: 14px; margin: 0 0 24px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 20px 22px; margin: 24px 0; }
.card h2 { margin-top: 0; }
ul { padding-left: 22px; }
li { margin: 4px 0; }
a { color: var(--accent); }
footer.site { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer.site a { color: var(--muted); }
footer.site a:hover { color: var(--accent); }