:root {
  --accent: #2a5a9c;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --bg: #f7f9fc;
  --card: #ffffff;
  --line: #e3e8ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: linear-gradient(180deg, #eef3fa 0%, var(--bg) 180px);
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.brand {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0;
  font-size: 1.75rem;
  line-height: 1.3;
  color: var(--accent);
}

h2 {
  margin: 28px 0 10px;
  font-size: 1.15rem;
  color: var(--accent);
}

h3 {
  margin: 20px 0 6px;
  font-size: 1rem;
}

.meta {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

p {
  margin: 0 0 12px;
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  text-decoration: none;
}

section {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 22px;
  margin-bottom: 14px;
}

.footer-nav {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}