:root {
  color-scheme: light;
  --banner-bg: #20140d;
  --banner-text: #fff6ed;
  --banner-link: #ffd9a8;
  --border: #d8dde8;
  --border-strong: #b8c0cf;
  --surface: #ffffff;
  --surface-muted: #f7f9fc;
  --surface-code: #101828;
  --text: #172033;
  --text-muted: #5d667a;
  --accent: #2563eb;
  --accent-soft: #eaf1ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--surface);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

html[lang="ja"] body {
  font-family:
    Inter,
    "Hiragino Sans",
    "Yu Gothic",
    "Noto Sans JP",
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

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

.contract-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 12px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  background: var(--banner-bg);
  color: var(--banner-text);
  font-size: 14px;
  line-height: 1.45;
}

.contract-banner strong {
  font-weight: 700;
}

.artifact-links {
  display: flex;
  flex: 0 0 auto;
  gap: 10px;
}

.artifact-links a {
  color: var(--banner-link);
  font-weight: 700;
  text-decoration: none;
}

.artifact-links a:hover {
  text-decoration: underline;
}

.docs-shell {
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
  min-width: 0;
  min-height: calc(100vh - 56px);
}

.docs-sidebar {
  border-right: 1px solid var(--border);
  background: var(--surface-muted);
  padding: 22px 16px;
}

.docs-sidebar h1 {
  margin: 0 0 4px;
  font-size: 18px;
  line-height: 1.25;
}

.docs-sidebar p {
  margin: 0 0 18px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.45;
}

.docs-nav {
  display: grid;
  gap: 4px;
}

.docs-nav a {
  display: block;
  border-radius: 6px;
  padding: 8px 10px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.35;
  text-decoration: none;
}

.docs-nav a:hover {
  background: #eef2f7;
}

.docs-nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: #1746a2;
  font-weight: 700;
}

.scope-nav {
  display: grid;
  gap: 3px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.scope-nav span {
  margin-bottom: 4px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.scope-nav a {
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
}

.scope-nav a:hover {
  background: #eef2f7;
}

.language-switcher {
  position: sticky;
  top: 16px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.language-switcher span {
  display: block;
  margin-bottom: 8px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.language-options {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface);
}

.language-options a {
  min-width: 44px;
  padding: 6px 10px;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.language-options a + a {
  border-left: 1px solid var(--border-strong);
}

.language-options a:hover {
  background: #eef2f7;
}

.language-options a[aria-current="true"] {
  background: var(--accent);
  color: #ffffff;
}

.reference-panel {
  min-width: 0;
}

#app {
  min-height: calc(100vh - 56px);
}

.doc-page {
  width: 100%;
  min-width: 0;
  max-width: 920px;
  padding: 44px 42px 72px;
}

.doc-page header {
  max-width: 760px;
  margin-bottom: 30px;
}

.doc-page h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: 0;
}

.doc-page h2 {
  margin: 34px 0 12px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

.doc-page h3 {
  margin: 24px 0 8px;
  font-size: 17px;
  line-height: 1.3;
}

.doc-page p,
.doc-page li {
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
}

.doc-page .lead {
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.65;
}

.doc-page code {
  border-radius: 4px;
  background: #eef2f7;
  padding: 2px 5px;
  color: #24324b;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

.doc-page pre {
  max-width: 100%;
  overflow-x: auto;
  border-radius: 8px;
  background: var(--surface-code);
  padding: 16px;
  color: #f8fafc;
  font-size: 13px;
  line-height: 1.55;
}

.doc-page pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.note {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 12px 14px;
}

.note p {
  margin: 0;
}

.compact-table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 24px;
  font-size: 14px;
}

.compact-table th,
.compact-table td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}

.compact-table th {
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .contract-banner {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 16px;
  }

  .artifact-links {
    flex-wrap: wrap;
  }

  .docs-shell {
    grid-template-columns: 1fr;
  }

  .docs-sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .docs-nav {
    grid-template-columns: repeat(auto-fit, minmax(min(150px, 100%), 1fr));
  }

  .language-switcher {
    position: static;
  }

  .doc-page {
    padding: 30px 20px 56px;
  }

  .doc-page h1 {
    font-size: 28px;
  }
}