:root {
  color-scheme: light;
  --ink: #17201d;
  --muted: #5b6662;
  --paper: #fbfcf9;
  --panel: #ffffff;
  --line: #dce3de;
  --brand: #176b52;
  --brand-dark: #0e4d3b;
  --soft: #edf6f1;
  --warning: #fff8e6;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Noto Sans", "Noto Sans JP", "Noto Sans KR",
    "Noto Sans SC", "Noto Sans TC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.72;
}

a { color: var(--brand-dark); text-underline-offset: 0.18em; }
a:hover { color: var(--brand); }
a:focus-visible, select:focus-visible {
  outline: 3px solid #80c9ad;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  padding: .65rem 1rem;
  background: var(--ink);
  color: white;
  border-radius: .5rem;
}
.skip-link:focus { top: 1rem; }

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(251, 252, 249, .96);
}

.header-inner, .page, .site-footer {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: .01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: .65rem;
  background: var(--brand);
  color: white;
  font-size: .92rem;
}

.language-control { display: flex; align-items: center; gap: .55rem; }
.language-control label { color: var(--muted); font-size: .9rem; }
.language-control select {
  max-width: 15rem;
  border: 1px solid var(--line);
  border-radius: .55rem;
  background: var(--panel);
  color: var(--ink);
  padding: .55rem 2rem .55rem .7rem;
  font: inherit;
}

.language-menu { position: relative; }
.language-menu summary {
  cursor: pointer;
  list-style: none;
  padding: .5rem .7rem;
  border: 1px solid var(--line);
  border-radius: .55rem;
  background: var(--panel);
}
.language-menu summary::-webkit-details-marker { display: none; }
.language-menu nav {
  position: absolute;
  z-index: 5;
  right: 0;
  display: grid;
  min-width: 15rem;
  max-height: min(70vh, 28rem);
  overflow: auto;
  margin-top: .35rem;
  padding: .45rem;
  border: 1px solid var(--line);
  border-radius: .7rem;
  background: var(--panel);
  box-shadow: 0 14px 40px rgba(23, 32, 29, .15);
}
.language-menu nav a { padding: .45rem .55rem; border-radius: .4rem; text-decoration: none; }
.language-menu nav a[aria-current="page"] { background: var(--soft); font-weight: 700; }

.page { padding: 2.3rem 0 4rem; }

.hero {
  padding: clamp(1.5rem, 4vw, 3.2rem);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: linear-gradient(135deg, var(--panel), var(--soft));
  box-shadow: 0 18px 50px rgba(23, 32, 29, .06);
}

.eyebrow {
  margin: 0 0 .4rem;
  color: var(--brand-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .11em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
h1 { margin: 0; font-size: clamp(2rem, 5vw, 3.6rem); letter-spacing: -.035em; }
h2 { margin: 2.4rem 0 .8rem; font-size: clamp(1.25rem, 3vw, 1.65rem); }
h3 { margin: 1.4rem 0 .55rem; font-size: 1.05rem; }
p { margin: .65rem 0; }
.document p { white-space: pre-line; }
ul, ol { padding-left: 1.35rem; }
li + li { margin-top: .35rem; }

.lede { max-width: 74ch; margin: 1rem 0 0; color: var(--muted); font-size: 1.08rem; }
.meta { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; margin-top: 1.15rem; color: var(--muted); font-size: .9rem; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16rem;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

.document { min-width: 0; }
.document section { scroll-margin-top: 1rem; }
.document .notice {
  margin: 1.2rem 0;
  padding: 1rem 1.1rem;
  border-left: 4px solid #d59e20;
  background: var(--warning);
}

.toc {
  position: sticky;
  top: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: .85rem;
  background: var(--panel);
}
.toc h2 { margin: 0 0 .6rem; font-size: .95rem; }
.toc ol { margin: 0; padding-left: 1.1rem; font-size: .88rem; line-height: 1.45; }
.toc li + li { margin-top: .45rem; }

.document-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
.document-card {
  display: block;
  min-height: 10rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: .85rem;
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
}
.document-card:hover { border-color: #8bbca9; box-shadow: 0 10px 25px rgba(23, 32, 29, .06); }
.document-card h2 { margin: 0 0 .45rem; font-size: 1.1rem; }
.document-card p { color: var(--muted); font-size: .92rem; }

.doc-nav {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}
.doc-nav a {
  padding: .45rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  text-decoration: none;
  font-size: .88rem;
}
.doc-nav a[aria-current="page"] { border-color: var(--brand); background: var(--soft); font-weight: 700; }

.site-footer {
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .88rem;
}

.render-error { padding: 2rem; color: #841f1f; }

@media (max-width: 780px) {
  .header-inner { align-items: flex-start; flex-direction: column; }
  .language-control { width: 100%; justify-content: space-between; }
  .language-control select { flex: 1; }
  .layout { grid-template-columns: 1fr; gap: 1rem; }
  .toc { position: static; order: -1; }
  .document-grid { grid-template-columns: 1fr; }
  .language-menu { width: 100%; }
  .language-menu summary { width: 100%; }
  .language-menu nav { left: 0; right: auto; width: 100%; }
}

@media print {
  .skip-link, .site-header, .toc, .doc-nav { display: none !important; }
  body { background: white; font-size: 11pt; }
  .page { width: 100%; padding: 0; }
  .hero { padding: 0 0 1rem; border: 0; box-shadow: none; background: white; }
  .layout { display: block; }
  a { color: inherit; text-decoration: none; }
}