:root {
  --ink: #0f2447;
  --muted: #4a5d7e;
  --line: #d6e3f5;
  --bg: #f4f8fd;
  --card: #ffffff;
  --accent: #1f6fe0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  padding: 0 16px;
}
main { max-width: 760px; margin: 0 auto; padding: 32px 0 64px; }
header { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 24px; }
header a.brand { font-weight: 800; font-size: 20px; color: var(--ink); text-decoration: none; }
nav a { margin-left: 14px; color: var(--accent); text-decoration: none; font-size: 15px; }
nav a:first-child { margin-left: 0; }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--ink); }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; margin: 16px 0; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
ol li { margin-bottom: 6px; }
a { color: var(--accent); }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); }