body {
  margin: 0;
  background: #0a1628;
  color: #dce8f7;
  font-family: "Segoe UI", "Noto Sans JP", Arial, sans-serif;
  line-height: 1.7;
}
.wrap { max-width: 760px; margin: auto; padding: 32px 24px; }
h1 { font-size: 1.6rem; margin-bottom: 4px; line-height: 1.3; }
a { color: #71d9ff; }
a:focus-visible { outline: 3px solid #fff; outline-offset: 4px; }
.sub, .note { color: #a8bdd8; font-size: .9rem; }
.cards { display: flex; flex-direction: column; gap: 14px; margin: 24px 0; }
a.card {
  display: block;
  background: #0d1f3c;
  border: 1px solid #315887;
  border-radius: 10px;
  padding: 18px 20px;
  color: #dce8f7;
  text-decoration: none;
}
a.card:hover { border-color: #71d9ff; }
.t { font-size: 1.05rem; font-weight: 600; color: #71d9ff; }
.d { font-size: .95rem; margin-top: 6px; }