@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700;800&display=swap");

:root {
  color-scheme: light;
  --page-bg: #eef8fc;
  --card-bg: #ffffff;
  --text: #12324a;
  --muted: #6f8494;
  --accent: #0068b7;
  --accent-dark: #005395;
  --border: #dbe8f0;
  --soft: #f3fbff;
  --shadow: 0 10px 28px rgba(18, 50, 74, 0.07);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--page-bg);
  font-family: "Noto Sans JP", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
}

.page {
  width: min(100%, 800px);
  margin: 0 auto;
  padding: 20px 16px 36px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
  padding: 6px 2px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  line-height: 1.3;
  text-decoration: none;
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.header-nav a {
  padding: 8px 10px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.header-nav a:hover {
  background: rgba(255, 255, 255, 0.7);
  color: var(--accent);
}

.card {
  margin-bottom: 16px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
}

.hero {
  padding: 28px 22px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.site-title {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.55rem, 6vw, 2.15rem);
  line-height: 1.22;
  letter-spacing: 0;
}

.document-title {
  font-size: clamp(1.35rem, 5vw, 1.72rem);
}

.lead {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.updated {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 22px;
}

.caption-link {
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1.5;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.caption-link:hover {
  color: var(--accent-dark);
}

.button,
.link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 50px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--soft);
  color: var(--text);
  font-weight: 800;
  line-height: 1.4;
  text-decoration: none;
}

.button {
  padding: 16px 16px 10px;
}

.link-card {
  padding: 13px 16px;
}

.button::after,
.link-card::after {
  content: "›";
  color: var(--accent);
  font-size: 1.35rem;
  line-height: 1;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.button.primary::after {
  color: #ffffff;
}

.button:hover,
.link-card:hover {
  border-color: #b9d5e8;
  background: #e9f7ff;
  color: var(--accent-dark);
}

.button.primary:hover {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  color: #ffffff;
}

section.card h2,
article.card h2 {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 1.22rem;
  line-height: 1.45;
}

p {
  margin: 0 0 14px;
}

p:last-child {
  margin-bottom: 0;
}

.link-list {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
}

.contact-address {
  display: inline-flex;
  max-width: 100%;
  overflow-wrap: anywhere;
  color: var(--accent);
  font-weight: 800;
}

.document article.card {
  padding: 24px 20px;
}

.document article h2 {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.document article h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.document article p {
  color: #29485d;
}

.back-link {
  margin-top: 18px;
}

.site-footer {
  margin-top: 20px;
  padding: 0 4px;
  color: var(--muted);
  font-size: 0.88rem;
  text-align: center;
}

.site-footer p {
  margin: 8px 0;
}

@media (min-width: 680px) {
  .page {
    padding: 28px 24px 48px;
  }

  .hero {
    padding: 40px;
  }

  .card {
    padding: 28px;
  }

  .document article.card {
    padding: 34px 38px;
  }
}

@media (max-width: 520px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-nav {
    justify-content: flex-start;
  }
}