:root {
  --bg: #fbfaf7; --ink: #1d2433; --muted: #5b6475; --line: #e4e1da;
  --card: #ffffff; --accent: #1f4d7a; --band: #14233a;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11161f; --ink: #e8ebf0; --muted: #a3acbb; --line: #273041;
          --card: #171e2a; --accent: #8ab4e0; --band: #0b1018; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
a { color: var(--accent); }
.bar { background: var(--band); }
.bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.mark { color: #fff; font-weight: 700; font-size: 20px; letter-spacing: .3px; text-decoration: none; }
.bar nav { display: flex; gap: 18px; flex-wrap: wrap; }
.bar nav a { color: #c9d6e6; text-decoration: none; font-size: 15px; }
.bar nav a:hover { color: #fff; }
section { padding: 36px 0; border-bottom: 1px solid var(--line); }
section:last-of-type { border-bottom: 0; }
.hero { padding-top: 56px; }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.2; margin: 0 0 16px; }
h2 { font-size: 22px; margin: 0 0 14px; }
h3 { font-size: 17px; margin: 0 0 8px; }
.lede { font-size: 19px; color: var(--muted); max-width: 42em; margin: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.facts { padding-left: 20px; }
.facts li { margin: 6px 0; }
.note { color: var(--muted); font-size: 15px; }
.prose { padding-top: 36px; padding-bottom: 24px; }
.prose h2 { margin-top: 32px; }
.prose ul { padding-left: 20px; }
.prose li { margin: 6px 0; }
.foot { padding-top: 24px; padding-bottom: 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }