:root {
  --ink: #16202b;
  --muted: #5a6573;
  --line: #e3e7ec;
  --bg: #ffffff;
  --band: #f5f7fa;
  --accent: #1f5f8b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
}
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.top { border-bottom: 1px solid var(--line); }
.top .bar { height: 64px; }
.brand { font-weight: 700; font-size: 19px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--accent); margin-left: 4px; font-weight: 500; }
nav a { color: var(--muted); text-decoration: none; margin-left: 24px; font-size: 15px; }
nav a:hover { color: var(--ink); }
.hero { padding: 96px 0 80px; }
.eyebrow { color: var(--accent); font-size: 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; margin: 0 0 16px; }
h1 { font-size: 46px; line-height: 1.15; margin: 0 0 20px; letter-spacing: -0.02em; max-width: 760px; }
.lead { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0 0 32px; }
.btn { display: inline-block; background: var(--ink); color: #fff; text-decoration: none; padding: 12px 22px; border-radius: 6px; font-weight: 600; font-size: 15px; }
.btn:hover { background: var(--accent); }
.block { padding: 64px 24px; }
h2 { font-size: 28px; margin: 0 0 28px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 0 0 8px; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid article { border: 1px solid var(--line); border-radius: 8px; padding: 24px; }
.grid p { margin: 0; color: var(--muted); }
.band { background: var(--band); }
.band p { max-width: 760px; color: var(--muted); }
.contact { display: grid; grid-template-columns: 120px 1fr; gap: 12px 24px; margin: 0; }
.contact dt { font-weight: 600; }
.contact dd { margin: 0; color: var(--muted); }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .bar { height: 64px; }
.doc { padding: 56px 24px 80px; max-width: 760px; }
.doc h1 { font-size: 34px; }
.doc h2 { font-size: 21px; margin: 32px 0 10px; }
.doc p, .doc li { color: #2c3743; }
.doc .updated { color: var(--muted); font-size: 15px; }
@media (max-width: 720px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .block { padding: 48px 16px; }
  nav { white-space: nowrap; }
  nav a { margin-left: 10px; font-size: 13px; }
  .brand { font-size: 16px; }
  .hero { padding: 56px 0 48px; }
  h1 { font-size: 32px; }
  .lead { font-size: 17px; }
  .grid { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; gap: 4px; }
  .contact dd { margin-bottom: 12px; }
}