:root {
  --brand: #2d5987;
  --brand-dark: #314478;
  --text: #1c2733;
  --muted: #5b6b7b;
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e2e8f0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
header {
  background: linear-gradient(135deg, var(--brand-dark), var(--brand));
  color: #fff;
  padding: 40px 20px;
}
header .wrap { max-width: 820px; margin: 0 auto; }
header .brand { font-size: 28px; font-weight: 700; letter-spacing: 0.5px; }
header .subtitle { opacity: 0.9; margin-top: 6px; }
main {
  max-width: 820px;
  margin: -24px auto 40px;
  padding: 0 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 6px 24px rgba(20, 40, 70, 0.06);
}
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 18px; color: var(--brand-dark); margin: 28px 0 8px; }
h3 { font-size: 15px; margin: 16px 0 4px; }
p, li { color: var(--text); }
.meta { color: var(--muted); font-size: 14px; margin-bottom: 8px; }
ul { padding-left: 20px; }
a { color: var(--brand); }
footer {
  max-width: 820px;
  margin: 0 auto 40px;
  padding: 0 16px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
.nav { margin-top: 14px; font-size: 14px; }
.nav a { color: #fff; margin-right: 16px; text-decoration: none; opacity: 0.9; }
.nav a:hover { text-decoration: underline; }