:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP",
    sans-serif;
  font-size: 17px;
  line-height: 1.75;
  color: #172033;
  background: #ffffff;
  --accent: #1859a9;
  --accent-dark: #0e3d78;
  --border: #dce3ec;
  --soft: #f5f8fc;
  --muted: #536174;
  --warning: #fff8df;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #ffffff;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-dark);
}

a:focus-visible {
  outline: 3px solid #f0a800;
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  top: -5rem;
  left: 1rem;
  z-index: 10;
  padding: 0.65rem 1rem;
  color: #ffffff;
  background: #172033;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: #ffffff;
}

.header-inner,
.page,
.footer-inner {
  width: min(100% - 2rem, 800px);
  margin-inline: auto;
}

.header-inner {
  padding: 1.1rem 0;
}

.brand {
  display: inline-block;
  color: #172033;
  font-size: 1.18rem;
  font-weight: 750;
  text-decoration: none;
}

.brand span {
  margin-left: 0.4rem;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.site-nav ul,
.language-nav ul,
.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
}

.site-nav a,
.language-nav a {
  display: inline-block;
  padding: 0.2rem 0;
}

.page {
  padding: 2.5rem 0 4rem;
}

h1,
h2,
h3 {
  line-height: 1.35;
  color: #111827;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 7vw, 3rem);
}

h2 {
  margin: 2.8rem 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--border);
  font-size: clamp(1.55rem, 5vw, 2rem);
}

h3 {
  margin: 2rem 0 0.55rem;
  font-size: 1.18rem;
}

p,
ul,
ol,
table {
  margin-top: 0.65rem;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.12rem;
}

.eyebrow {
  margin-bottom: 0.25rem;
  color: var(--accent-dark);
  font-size: 0.85rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.summary,
.notice,
.contact-box {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--soft);
}

.notice {
  background: var(--warning);
}

.summary h3,
.notice h3,
.contact-box h3 {
  margin-top: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  display: block;
  padding: 1.1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
  background: #ffffff;
}

.card:hover {
  border-color: var(--accent);
  background: var(--soft);
}

.card strong {
  display: block;
  color: var(--accent);
}

.card span {
  color: var(--muted);
  font-size: 0.92rem;
}

.table-wrap {
  overflow-x: auto;
  margin: 1.2rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}

th,
td {
  padding: 0.7rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
}

code {
  padding: 0.08rem 0.3rem;
  border-radius: 4px;
  background: #edf1f7;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.language-divider {
  margin: 4rem 0 0;
  border: 0;
  border-top: 4px solid var(--border);
}

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

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  background: var(--soft);
}

.footer-inner {
  padding: 1.5rem 0 2rem;
}

.footer-inner p {
  margin: 0.35rem 0;
}

@media (max-width: 520px) {
  :root {
    font-size: 16px;
  }

  .header-inner,
  .page,
  .footer-inner {
    width: min(100% - 1.4rem, 800px);
  }

  .page {
    padding-top: 1.8rem;
  }

  th,
  td {
    min-width: 9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  .skip-link,
  .site-nav,
  .language-nav {
    display: none;
  }

  .page {
    width: 100%;
    padding: 0;
  }

  a {
    color: inherit;
  }
}