/* ====== ベース ====== */
body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fafafa;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ====== ヘッダー ====== */
.site-header {
  background: #003366;
  color: #fff;
  padding: 1rem 0;
}

.logo {
  margin: 0;
  font-size: 1.5rem;
}

.logo a {
  color: #fff;
  text-decoration: none;
}

.nav {
  margin-top: 0.5rem;
}

.nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1rem;
}

.nav a {
  color: #fff;
  text-decoration: none;
}

.nav a:hover {
  text-decoration: underline;
}

/* ====== フッター ====== */
.site-footer {
  background: #003366;
  color: #fff;
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
  font-size: .9rem;
}

/* ====== レスポンシブ対応 ====== */
@media (max-width: 768px) {
  .nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}

.nav a {
  color: #fff;
  text-decoration: none;
}

.nav a:hover {
  text-decoration: underline;
}