:root {
  --navy: #0b1f3a;
  --blue: #185aa9;
  --gold: #b58b34;
  --ink: #18212f;
  --muted: #5c6777;
  --line: #d9e0e8;
  --paper: #ffffff;
  --wash: #f5f8fb;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--wash);
  font-family: "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  line-height: 1.8;
}

a {
  color: var(--blue);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 3px;
}

.site-header {
  color: #fff;
  background: linear-gradient(120deg, var(--navy), #123d70);
  border-bottom: 4px solid var(--gold);
}

.header-inner,
.page-shell,
.footer-inner {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}

.brand {
  color: #fff;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.site-nav a {
  color: #fff;
  font-size: 0.92rem;
  text-decoration: none;
}

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

.hero {
  padding: 72px 0 54px;
  color: #fff;
  background:
    radial-gradient(circle at 85% 15%, rgb(80 153 227 / 34%), transparent 32%),
    linear-gradient(145deg, #08172c, #123b69 72%, #174d7c);
}

.eyebrow {
  margin: 0 0 10px;
  color: #f1ce78;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.4;
}

h1 {
  max-width: 790px;
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
}

.hero-copy {
  max-width: 720px;
  margin: 22px 0 0;
  font-size: 1.08rem;
}

.page-shell {
  padding: 50px 0 72px;
}

.summary-card,
.content-card {
  padding: 30px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgb(11 31 58 / 7%);
}

.summary-card {
  margin-bottom: 28px;
  border-top: 4px solid var(--gold);
}

.content-card + .content-card {
  margin-top: 22px;
}

.content-card h2,
.summary-card h2 {
  margin-top: 0;
  color: var(--navy);
}

.content-card h3 {
  margin-top: 28px;
  color: #244466;
}

.notice {
  padding: 18px 20px;
  background: #eef6ff;
  border-left: 5px solid var(--blue);
  border-radius: 4px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0 0;
}

.fact {
  padding: 20px;
  background: #f7f9fc;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.fact strong {
  display: block;
  margin-bottom: 6px;
  color: var(--navy);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
  border: 1px solid var(--line);
}

th {
  width: 28%;
  color: var(--navy);
  background: #edf2f7;
}

.site-footer {
  color: #dce6f1;
  background: var(--navy);
}

.footer-inner {
  padding: 30px 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 12px;
}

.footer-links a {
  color: #fff;
}

.small {
  color: var(--muted);
  font-size: 0.88rem;
}

.site-footer .small {
  color: #b9c8d8;
}

@media (max-width: 720px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .facts {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 54px;
  }

  th,
  td {
    display: block;
    width: 100%;
  }
}