:root {
  --ink: #17202a;
  --muted: #5b6773;
  --line: #e2e6ea;
  --accent: #1f5f8b;
  --bg: #ffffff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 16px/1.65 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
.wrap { max-width: 980px; margin: 0 auto; padding: 0 22px; }
.wrap.narrow { max-width: 720px; }

header.site { border-bottom: 1px solid var(--line); background: #fbfcfd; }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 62px; }
.brand { font-weight: 650; text-decoration: none; color: var(--ink); letter-spacing: .2px; }
.brand .mark {
  display: inline-block; width: 26px; height: 26px; line-height: 26px; text-align: center;
  background: var(--accent); color: #fff; border-radius: 5px; font-size: 13px;
  margin-right: 9px; vertical-align: -3px;
}
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover { color: var(--accent); }

.hero { background: #f4f7f9; border-bottom: 1px solid var(--line); padding: 62px 0 54px; }
.hero h1 { margin: 0 0 14px; font-size: 34px; line-height: 1.25; letter-spacing: -.2px; }
.lede { color: var(--muted); font-size: 18px; max-width: 680px; margin: 0 0 22px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff; text-decoration: none;
  padding: 10px 20px; border-radius: 4px; font-size: 15px;
}
.btn:hover { background: #17486a; }

main { padding: 8px 0 40px; }
h2 { font-size: 20px; margin: 38px 0 10px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 26px; margin-top: 34px; }
.grid article { border: 1px solid var(--line); border-radius: 6px; padding: 20px 22px; }
.grid article h2 { margin-top: 0; font-size: 17px; }
.grid article p { color: var(--muted); margin-bottom: 0; }

ul.plain { padding-left: 20px; }
ul.plain li { margin: 8px 0; color: var(--muted); }
.note { color: var(--muted); font-size: 14px; border-left: 3px solid var(--line); padding-left: 14px; }

table.rows { width: 100%; border-collapse: collapse; margin-top: 16px; }
table.rows th, table.rows td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: 15px; }
table.rows th { color: var(--muted); font-weight: 600; }

footer.site { border-top: 1px solid var(--line); background: #fbfcfd; padding: 26px 0 34px; }
footer.site p { margin: 4px 0; font-size: 14px; color: var(--muted); }
footer.site a { color: var(--accent); text-decoration: none; }
.fine { font-size: 13px !important; color: #8a949e !important; }