:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #14181f;
  --muted: #5a6472;
  --accent: #1b4b8f;
  --line: #e2e6ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --card: #161b22;
    --text: #e9edf3;
    --muted: #9fb0c4;
    --accent: #7eb0ff;
    --line: #262d36;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0 20px 80px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 760px; margin: 0 auto; }
header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}
.mark {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none; color: inherit;
}
.logo {
  width: 46px; height: 46px; border-radius: 11px;
  background: linear-gradient(160deg, #0c1f44, #163c78);
  display: grid; place-items: center;
  color: #e8c36b; font-weight: 800; font-size: 15px; letter-spacing: .5px;
}
h1 { font-size: 30px; line-height: 1.2; margin: 22px 0 6px; }
h2 { font-size: 20px; margin: 30px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 20px; margin: 18px 0;
}
a { color: var(--accent); }
nav a { margin-right: 18px; font-weight: 600; text-decoration: none; }
nav { margin-top: 14px; }
footer { margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 15px; }
code { background: var(--bg); padding: 2px 6px; border-radius: 5px; font-size: 14px; }