:root {
  --navy: #1E3163;
  --teal: #3A9E92;
  --ink: #1a1a1a;
  --muted: #5a5f6b;
  --line: #e4e7ec;
  --bg: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
header {
  background: var(--navy);
  color: #fff;
  padding: 28px 0;
}
header .wrap { display: flex; align-items: baseline; gap: 14px; }
header .brand { font-size: 20px; font-weight: 700; letter-spacing: .2px; }
header .brand span { color: var(--teal); }
header nav { margin-left: auto; display: flex; gap: 20px; }
header nav a { color: #cdd6e8; text-decoration: none; font-size: 14px; }
header nav a:hover { color: #fff; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }
main { padding: 44px 0 72px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; color: var(--navy); }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 32px; }
h2 { font-size: 19px; margin: 36px 0 10px; color: var(--navy); }
h3 { font-size: 16px; margin: 24px 0 8px; }
p, li { color: #2a2e37; }
a { color: var(--teal); }
ul { padding-left: 22px; }
li { margin: 6px 0; }
.note {
  background: #f5f8f7;
  border-left: 3px solid var(--teal);
  padding: 14px 18px;
  border-radius: 0 6px 6px 0;
  font-size: 15px;
  margin: 20px 0;
}
.cards { display: grid; gap: 18px; grid-template-columns: 1fr 1fr; margin: 34px 0; }
.card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.card:hover { border-color: var(--teal); box-shadow: 0 4px 18px rgba(30,49,99,.08); }
.card h2 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
footer {
  border-top: 1px solid var(--line);
  padding: 26px 0;
  color: var(--muted);
  font-size: 13px;
}
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } header nav { display: none; } }