:root {
  color-scheme: light dark;
  --background: #f7f7fb;
  --surface: #ffffff;
  --surface-muted: #f0f1f7;
  --text: #1b1b1f;
  --text-muted: #5f6069;
  --primary: #415f91;
  --primary-container: #d6e3ff;
  --on-primary-container: #001b3e;
  --outline: #c5c6cf;
  --shadow: 0 12px 32px rgb(27 27 31 / 8%);
}
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: var(--primary);
  overflow-wrap: anywhere;
  text-underline-offset: 0.2em;
}

a:focus-visible {
  border-radius: 4px;
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

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

.header-inner,
.page,
.footer-inner {
  width: min(100% - 32px, 920px);
  margin-inline: auto;
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 750;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.site-nav a {
  color: var(--text);
  font-weight: 600;
}

.page {
  padding-block: 56px 72px;
}

.hero,
.document {
  border: 1px solid var(--outline);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero {
  padding: clamp(28px, 6vw, 64px);
}

.hero h1,
.document h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.hero p {
  max-width: 48rem;
  margin: 24px 0 0;
  color: var(--text-muted);
  font-size: 1.08rem;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.link-card {
  display: block;
  border-radius: 18px;
  background: var(--primary-container);
  color: var(--on-primary-container);
  padding: 24px;
  text-decoration: none;
}

.link-card strong,
.link-card span {
  display: block;
}

.link-card strong {
  font-size: 1.15rem;
}

.link-card span {
  margin-top: 4px;
}

.document {
  padding: clamp(24px, 6vw, 56px);
}

.document h1 {
  font-size: clamp(2rem, 6vw, 3rem);
}

.document h2 {
  margin: 48px 0 16px;
  font-size: 1.45rem;
  line-height: 1.4;
}

.document h3 {
  margin: 32px 0 12px;
  font-size: 1.12rem;
}

.document p,
.document ul,
.document ol,
.document dl {
  margin-block: 12px;
}

.document li + li {
  margin-top: 8px;
}

.document dt {
  margin-top: 18px;
  font-weight: 700;
}

.document dd {
  margin: 4px 0 0;
}

.document code {
  border-radius: 6px;
  background: var(--surface-muted);
  padding: 0.1em 0.35em;
  font-family: ui-monospace, "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

.metadata,
.notice {
  border-radius: 16px;
  background: var(--surface-muted);
  padding: 18px 20px;
}

.metadata {
  margin-top: 24px;
  color: var(--text-muted);
}

.notice {
  margin-block: 24px;
}

.table-wrapper {
  overflow-x: auto;
  margin-block: 20px;
}

table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

th,
td {
  border: 1px solid var(--outline);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface-muted);
}

.site-footer {
  border-top: 1px solid var(--outline);
  background: var(--surface);
}

.footer-inner {
  padding-block: 28px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

@media (max-width: 640px) {
  .header-inner {
    min-height: auto;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-block: 18px;
  }

  .page {
    padding-block: 28px 48px;
  }

  .hero,
  .document {
    border-radius: 18px;
  }

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

@media (prefers-color-scheme: dark) {
  :root {
    --background: #111318;
    --surface: #1b1b1f;
    --surface-muted: #25262d;
    --text: #e3e2e6;
    --text-muted: #c5c6cf;
    --primary: #aac7ff;
    --primary-container: #264777;
    --on-primary-container: #d6e3ff;
    --outline: #45464f;
    --shadow: 0 12px 32px rgb(0 0 0 / 24%);
  }
}