:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --text: #1a1f2e;
  --muted: #5c6578;
  --accent: #0d7a4a;
  --accent-soft: #e6f4ed;
  --border: #dde3eb;
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --max: 760px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: min(100% - 2rem, 960px);
  margin-inline: auto;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--accent);
  text-decoration: none;
}

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

.top-nav {
  font-size: 0.875rem;
}

.top-nav a {
  color: var(--muted);
  text-decoration: none;
}

.top-nav a:hover {
  color: var(--accent);
}

/* Unified single-URL pages (in-app WebView style) */
body.unified-page {
  background: #fff;
}

.unified-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
}

.unified-header h1 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  flex: 1;
  text-align: center;
  line-height: 1.3;
}

.unified-header .header-spacer {
  width: 72px;
  flex-shrink: 0;
}

.lang-switcher {
  flex-shrink: 0;
}

.lang-switcher label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.lang-switcher select {
  appearance: none;
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235c6578' d='M3 4.5L6 8l3-3.5'/%3E%3C/svg%3E") no-repeat right 0.35rem center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.4rem 1.6rem 0.4rem 0.65rem;
  min-width: 7.5rem;
  cursor: pointer;
}

.unified-main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.25rem 2.5rem;
}

.unified-main .doc-inner {
  font-size: 0.9375rem;
  line-height: 1.6;
}

.lang-panel {
  display: none;
}

.lang-panel.is-active {
  display: block;
}

.unified-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem 2rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.unified-footer a {
  color: var(--accent);
}

.doc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem 2.5rem;
  margin: 1.5rem auto 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.region-badge {
  display: inline-block;
  margin: 0 0 1.25rem;
  padding: 0.25rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.doc h1,
.doc-inner h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

.doc h2,
.doc-inner h2 {
  font-size: 1.2rem;
  margin: 2rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.doc h2:first-of-type,
.doc-inner h2:first-of-type {
  border-top: none;
  padding-top: 0;
}

.doc h3,
.doc-inner h3 {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.5rem;
}

.doc p,
.doc-inner p {
  margin: 0 0 0.85rem;
  color: var(--text);
}

.doc p.numbered,
.doc-inner p.numbered {
  padding-left: 0.25rem;
}

.doc ul,
.doc-inner ul {
  margin: 0 0 1rem;
  padding-left: 1.35rem;
}

.doc li,
.doc-inner li {
  margin-bottom: 0.35rem;
}

.doc hr,
.doc-inner hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

.doc strong,
.doc-inner strong {
  font-weight: 600;
}

.doc code,
.doc-inner code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 1.25rem;
  -webkit-overflow-scrolling: touch;
}

.doc table,
.doc-inner table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.doc th,
.doc td,
.doc-inner th,
.doc-inner td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.doc th,
.doc-inner th {
  background: var(--bg);
  font-weight: 600;
}

.site-footer {
  padding: 1.5rem 0 2.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer a {
  color: var(--accent);
}

/* Index page */
.index-main {
  padding: 2rem 0 1rem;
}

.index-main h1 {
  font-size: 2rem;
  margin: 0 0 0.5rem;
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.market-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}

.market-card h2 {
  font-size: 1.1rem;
  margin: 0 0 0.35rem;
}

.market-card p {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.market-card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.market-card a {
  color: var(--accent);
  font-weight: 500;
}

.notice {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.notice h2 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

.notice p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .doc {
    padding: 1.35rem 1.1rem 1.75rem;
    margin-inline: 0;
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  .doc h1 {
    font-size: 1.45rem;
  }
}

@media print {
  .site-header,
  .site-footer,
  .region-badge,
  .top-nav {
    display: none;
  }

  .doc {
    box-shadow: none;
    border: none;
    padding: 0;
  }
}