:root {
  --font-brand: "Libre Baskerville", Baskerville, Georgia, serif;
  --font-sans: "Instrument Sans", Inter, ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
  --header-height: 64px;
  --sidebar-width: 260px;
  --content-width: 48rem;
  --toc-width: 232px;
  --radius-sm: 6px;
  --radius: 8px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --control-hover: color-mix(in srgb, var(--text) 4%, transparent);
  --control-pressed: color-mix(in srgb, var(--text) 8%, transparent);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --bg-alt: #fafafa;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --text: #0f0f10;
  --text-secondary: #5b5b64;
  --text-tertiary: #707078;
  --border: rgb(0 0 29 / 10%);
  --border-strong: rgb(0 0 29 / 22%);
  --accent: #0070f3;
  --accent-soft: rgb(0 112 243 / 8%);
  --header-bg: rgb(255 255 255 / 88%);
  --overlay: rgb(15 15 16 / 28%);
  --code-bg: #f7f7f8;
  --note-bg: #f4f8ff;
  --note-border: #8ab8f1;
  --warning-bg: #fff8e8;
  --warning-border: #d69525;
  --danger: #b42318;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --bg-alt: #0a0a0a;
  --surface: #111111;
  --surface-raised: #171717;
  --text: #ededed;
  --text-secondary: #a1a1a1;
  --text-tertiary: #8a8a8a;
  --border: rgb(151 151 159 / 20%);
  --border-strong: rgb(151 151 159 / 38%);
  --accent: #3291ff;
  --accent-soft: rgb(50 145 255 / 14%);
  --header-bg: rgb(0 0 0 / 88%);
  --overlay: rgb(0 0 0 / 62%);
  --code-bg: #0d0d0d;
  --note-bg: #071525;
  --note-border: #286da8;
  --warning-bg: #211707;
  --warning-border: #9b6a16;
  --danger: #ff8f86;
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 0; background: var(--bg); scroll-padding-top: calc(var(--header-height) + 1.25rem); }
body { min-width: 0; margin: 0; background: var(--bg); color: var(--text); font: 400 16px/1.65 var(--font-sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body.nav-open, body.search-open { overflow: hidden; }
a { color: var(--accent); text-decoration-thickness: .07em; text-underline-offset: .18em; }
button, input { font: inherit; }
button { color: inherit; }
svg { display: block; width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::selection { background: var(--accent); color: #fff; }
[hidden] { display: none !important; }

.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 200; top: .5rem; left: .75rem; transform: translateY(-160%); padding: .55rem .8rem; border: 1px solid var(--border-strong); border-radius: var(--radius-sm); background: var(--surface-raised); color: var(--text); text-decoration: none; }
.skip-link:focus { transform: none; }

.site-header { position: fixed; z-index: 50; inset: 0 0 auto; height: var(--header-height); display: grid; grid-template-columns: 1fr minmax(15rem, 28rem) 1fr; align-items: center; gap: 1.25rem; padding: 0 clamp(1rem, 2vw, 2rem); border-bottom: 1px solid var(--border); background: var(--header-bg); backdrop-filter: blur(16px) saturate(140%); }
.header-brand, .header-actions { display: flex; align-items: center; min-width: 0; }
.header-brand { gap: .55rem; }
.header-actions { justify-content: flex-end; gap: .55rem; }
.wordmark { display: inline-flex; align-items: center; gap: .5rem; color: var(--text); font: 700 1rem/1 var(--font-brand); letter-spacing: -.025em; text-decoration: none; }
.brand-logo { width: 1.25rem; height: 1.25rem; flex: none; background: currentColor; mask: url('favicon.svg') center / contain no-repeat; }
.brand-separator { color: var(--text-tertiary); }
.docs-mark { color: var(--text-secondary); font-size: .88rem; font-weight: 600; text-decoration: none; }
.icon-button { width: 36px; height: 36px; display: inline-grid; flex: 0 0 auto; place-items: center; padding: 0; border: 1px solid transparent; border-radius: var(--radius-sm); background: transparent; cursor: pointer; text-decoration: none; }
.icon-button:hover { border-color: var(--border); background: var(--control-hover); }
.nav-trigger { display: none; }
.search-trigger { min-width: 0; height: 36px; display: flex; align-items: center; gap: .55rem; padding: 0 .7rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); color: var(--text-secondary); cursor: pointer; text-align: left; }
.search-trigger:hover { border-color: var(--border-strong); color: var(--text); }
.search-trigger span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
kbd { display: inline-flex; min-width: 1.35rem; min-height: 1.25rem; align-items: center; justify-content: center; padding: 0 .3rem; border: 1px solid var(--border); border-bottom-color: var(--border-strong); border-radius: 4px; background: var(--bg-alt); color: var(--text-secondary); font: 500 .68rem/1 var(--font-mono); }
.header-cta { min-height: 36px; display: inline-flex; align-items: center; padding: 0 .85rem; border: 1px solid var(--text); border-radius: var(--radius-sm); background: var(--text); color: var(--bg); font-size: .82rem; font-weight: 600; text-decoration: none; white-space: nowrap; }
.header-cta:hover { opacity: .86; }
.theme-toggle { width: 34px; height: 34px; display: inline-flex; flex: 0 0 auto; align-items: center; justify-content: center; padding: 0; border: 0; border-radius: 6px; background: transparent; color: var(--text-tertiary); cursor: pointer; transition: color .15s, background .15s; }
.theme-toggle:hover { border-color: transparent; background: var(--control-hover); color: var(--text); }
.theme-toggle svg { overflow: visible; transition: transform .6s cubic-bezier(.6, 0, 1, .4); }
.theme-toggle .moon { display: none; fill: currentColor; stroke: none; }
[data-theme="dark"] .theme-toggle .sun-ring, [data-theme="dark"] .theme-toggle .sun-rays { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }

.locale-menu { position: relative; }
.locale-menu__trigger { min-height: 36px; display: inline-flex; align-items: center; padding: 0 .65rem; border: 1px solid transparent; border-radius: var(--radius-sm); background: transparent; color: var(--text); cursor: pointer; }
.locale-menu__trigger:hover, .locale-menu__trigger[aria-expanded="true"] { border-color: var(--border); background: var(--control-hover); }
.locale-menu__popover { position: absolute; z-index: 90; top: calc(100% + .5rem); right: 0; width: max-content; min-width: 14rem; padding: .4rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-raised); box-shadow: 0 18px 50px rgb(0 0 0 / 18%); }
.locale-menu__option { width: 100%; min-height: 2.35rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .45rem .65rem; border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--text); cursor: pointer; text-decoration: none; }
.locale-menu__option:hover, .locale-menu__option:focus-visible { background: var(--control-hover); outline-offset: -2px; }
.locale-menu__check { visibility: hidden; }
.locale-menu__option[aria-checked="true"] .locale-menu__check { visibility: visible; }
.locale-menu__error { margin: .4rem .65rem .25rem; color: var(--danger); font-size: .78rem; }

.page-shell { min-width: 0; max-width: calc(var(--sidebar-width) + var(--content-width) + var(--toc-width)); min-height: calc(100vh - var(--header-height)); display: grid; grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width)) var(--toc-width); margin: var(--header-height) auto 0; }
.sidebar { position: sticky; top: var(--header-height); height: calc(100vh - var(--header-height)); overflow-y: auto; padding: 1.5rem 1rem 2rem; border-right: 1px solid var(--border); background: var(--bg); scrollbar-width: thin; }
.sidebar-mobile-head { display: none; }
.sidebar-nav { display: grid; gap: 1rem; }
.nav-group, .nav-subgroup { min-width: 0; }
.nav-group > summary, .nav-subgroup > summary { display: flex; align-items: center; justify-content: space-between; gap: .5rem; color: var(--text-secondary); cursor: pointer; font-size: .72rem; font-weight: 700; letter-spacing: .055em; list-style: none; text-transform: none; }
.nav-group > summary::-webkit-details-marker, .nav-subgroup > summary::-webkit-details-marker { display: none; }
.nav-group > summary::after, .nav-subgroup > summary::after { width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; content: ""; transform: rotate(45deg); transition: transform .18s var(--ease); }
.nav-group[open] > summary::after, .nav-subgroup[open] > summary::after { transform: rotate(225deg); }
.nav-group > div, .nav-subgroup > div { display: grid; gap: 2px; margin-top: .35rem; }
.nav-item { min-width: 0; display: block; overflow: hidden; padding: .36rem .55rem; border-radius: var(--radius-sm); color: var(--text-secondary); font-size: .82rem; line-height: 1.35; text-decoration: none; text-overflow: ellipsis; }
.nav-item:hover { background: var(--control-hover); color: var(--text); }
.nav-item[aria-current="page"] { background: var(--accent-soft); color: var(--text); font-weight: 600; }
.nav-api > p { margin: 0 0 .35rem; color: var(--text-secondary); font-size: .72rem; font-weight: 700; letter-spacing: .055em; text-transform: none; }
.nav-subgroup { margin: .45rem 0 0 .45rem; padding-left: .65rem; border-left: 1px solid var(--border); }
.nav-subgroup > summary { font-size: .68rem; }

main { min-width: 0; padding: 3.25rem clamp(1.5rem, 4vw, 3.5rem) 5rem; }
article { min-width: 0; }
.breadcrumbs { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; margin-bottom: 1.2rem; color: var(--text-tertiary); font-size: .74rem; }
.breadcrumbs a { color: inherit; text-decoration: none; }
.breadcrumbs a:hover { color: var(--text); }
.page-heading { padding-bottom: 2rem; border-bottom: 1px solid var(--border); }
h1, h2, h3 { color: var(--text); scroll-margin-top: calc(var(--header-height) + 1.2rem); }
h1 { max-width: 16ch; margin: 0; font: 700 clamp(2.6rem, 5vw, 3.1rem)/1.12 var(--font-brand); letter-spacing: -.04em; }
.prose { min-width: 0; padding-top: 2rem; }
.prose > :first-child { margin-top: 0; }
.prose h2 { margin: 2.8rem 0 .9rem; font-size: 1.55rem; line-height: 1.25; letter-spacing: -.025em; }
.prose h3 { margin: 2rem 0 .7rem; font-size: 1.12rem; line-height: 1.35; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose .table-scroll, .prose .code-block { margin: 1rem 0; }
.prose ul { padding-left: 1.4rem; }
.prose li + li { margin-top: .45rem; }
code { font-family: var(--font-mono); font-size: .88em; }
:not(pre) > code { padding: .12em .34em; border: 1px solid var(--border); border-radius: 4px; background: var(--code-bg); overflow-wrap: anywhere; }
.code-block { min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--code-bg); }
.code-head { min-height: 2.3rem; display: flex; align-items: center; justify-content: space-between; padding: 0 .55rem 0 .8rem; border-bottom: 1px solid var(--border); color: var(--text-tertiary); font: 500 .69rem/1 var(--font-mono); text-transform: uppercase; }
.copy-button { min-height: 1.75rem; padding: 0 .55rem; border: 1px solid var(--border); border-radius: 5px; background: var(--surface); color: var(--text-secondary); cursor: pointer; font-size: .72rem; text-transform: none; }
.copy-button:hover { border-color: var(--border-strong); color: var(--text); }
pre { min-width: 0; max-width: 100%; margin: 0; overflow: auto; padding: 1rem; color: var(--text); font: 400 .78rem/1.7 var(--font-mono); tab-size: 2; }
pre code { font: inherit; white-space: pre; }
.steps { counter-reset: steps; padding: 0; list-style: none; }
.steps > li { position: relative; min-height: 2rem; padding: 0 0 1.2rem 2.8rem; counter-increment: steps; }
.steps > li::before { position: absolute; top: 0; left: 0; width: 1.75rem; height: 1.75rem; display: grid; place-items: center; border: 1px solid var(--border-strong); border-radius: 50%; content: counter(steps); color: var(--text); font: 600 .72rem/1 var(--font-mono); }
.steps > li:not(:last-child)::after { position: absolute; top: 1.9rem; bottom: .1rem; left: .86rem; width: 1px; background: var(--border); content: ""; }
blockquote { padding: .15rem 0 .15rem 1rem; border-left: 2px solid var(--border-strong); color: var(--text-secondary); }
.callout { padding: 1rem 1.1rem; border: 1px solid var(--note-border); border-radius: var(--radius); background: var(--note-bg); }
.callout--warning { border-color: var(--warning-border); background: var(--warning-bg); }
.callout strong { display: block; margin-bottom: .25rem; font-size: .82rem; }
.callout p { margin: 0; }
.table-scroll { max-width: 100%; overflow: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; min-width: 32rem; border-collapse: collapse; font-size: .88rem; }
th, td { padding: .7rem .8rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: var(--bg-alt); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

.api-contract { margin: 2rem 0 0; padding: 1.15rem; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--bg-alt); }
.api-contract h2 { margin: 0 0 1rem; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; }
.api-contract dl { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: .65rem 1rem; margin: 0; }
.api-contract dt { color: var(--text-secondary); font-size: .78rem; font-weight: 600; }
.api-contract dd { min-width: 0; margin: 0; overflow-wrap: anywhere; font-size: .84rem; }
.api-contract details { margin-top: 1rem; }
.api-contract summary { cursor: pointer; font-size: .82rem; font-weight: 600; }
.api-contract .code-block { margin: .8rem 0 0; }
.http-method, .status-badge { display: inline-flex; align-items: center; min-height: 1.45rem; padding: 0 .4rem; border: 1px solid var(--border-strong); border-radius: 4px; background: var(--surface); color: var(--text); font: 600 .68rem/1 var(--font-mono); }
.http-method--get { color: #14724b; }
.http-method--post { color: #1769aa; }
.http-method--put, .http-method--patch { color: #8a5a00; }
.http-method--delete { color: #b42318; }
[data-theme="dark"] .http-method--get { color: #63d9a5; }
[data-theme="dark"] .http-method--post { color: #70b8ff; }
[data-theme="dark"] .http-method--put, [data-theme="dark"] .http-method--patch { color: #f2c56d; }
[data-theme="dark"] .http-method--delete { color: #ff8f86; }
.status-badge { margin: 0 .2rem .2rem 0; font-weight: 500; }

.page-turns { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1rem; margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.page-turn { min-width: 0; padding: .8rem; border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); text-decoration: none; }
.page-turn:hover { border-color: var(--border-strong); background: var(--control-hover); }
.page-turn span { display: block; margin-bottom: .2rem; color: var(--text-tertiary); font-size: .7rem; text-transform: uppercase; }
.page-turn strong { display: block; overflow: hidden; font-size: .84rem; text-overflow: ellipsis; white-space: nowrap; }
.page-turn--next { text-align: right; }

.toc { position: sticky; top: var(--header-height); height: calc(100vh - var(--header-height)); overflow-y: auto; padding: 3.25rem 1rem 2rem 1.5rem; border-left: 1px solid var(--border); }
.toc-label { margin: 0 0 .65rem; color: var(--text-secondary); font-size: .7rem; font-weight: 700; letter-spacing: .055em; text-transform: none; }
.toc nav { display: grid; gap: .15rem; }
.toc a { padding: .28rem 0; color: var(--text-tertiary); font-size: .75rem; line-height: 1.35; text-decoration: none; }
.toc a:hover, .toc a[aria-current="true"] { color: var(--text); }
.toc-level-3 { padding-left: .8rem !important; }
.toc:has(nav:empty) { visibility: hidden; }

footer { max-width: calc(var(--sidebar-width) + var(--content-width) + var(--toc-width)); margin: 0 auto; padding: 1.25rem; border-top: 1px solid var(--border); color: var(--text-secondary); font-size: .78rem; text-align: center; }
.sidebar-scrim { position: fixed; z-index: 60; inset: var(--header-height) 0 0; background: var(--overlay); }

.search-layer { position: fixed; z-index: 120; inset: 0; }
.search-backdrop { position: absolute; inset: 0; background: var(--overlay); backdrop-filter: blur(3px); }
.search-dialog { position: relative; width: min(38rem, calc(100% - 2rem)); max-height: min(38rem, calc(100vh - 4rem)); display: flex; flex-direction: column; margin: 10vh auto 0; overflow: hidden; border: 1px solid var(--border-strong); border-radius: 10px; background: var(--surface-raised); box-shadow: 0 24px 80px rgb(0 0 0 / 28%); }
.search-input-wrap { min-height: 3.4rem; display: flex; align-items: center; gap: .7rem; padding: 0 .7rem 0 1rem; border-bottom: 1px solid var(--border); }
.search-input-wrap input { min-width: 0; flex: 1; border: 0; outline: 0; background: transparent; color: var(--text); }
.search-input-wrap input::placeholder { color: var(--text-tertiary); }
.search-results { min-height: 12rem; overflow-y: auto; padding: .5rem; }
.search-result { width: 100%; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .3rem 1rem; padding: .65rem .75rem; border: 0; border-radius: var(--radius-sm); background: transparent; color: var(--text); cursor: pointer; text-align: left; }
.search-result:hover, .search-result[aria-selected="true"] { background: var(--control-hover); }
.search-result strong { overflow: hidden; font-size: .86rem; text-overflow: ellipsis; white-space: nowrap; }
.search-result small { grid-column: 1; overflow: hidden; color: var(--text-secondary); font-size: .74rem; text-overflow: ellipsis; white-space: nowrap; }
.search-result span { grid-row: 1 / 3; grid-column: 2; align-self: center; color: var(--text-tertiary); font-size: .7rem; }
.search-message { padding: 3rem 1rem; color: var(--text-secondary); font-size: .84rem; text-align: center; }
.search-help { display: flex; gap: 1.2rem; padding: .6rem .8rem; border-top: 1px solid var(--border); color: var(--text-tertiary); font-size: .68rem; }
.search-help span { display: flex; align-items: center; gap: .25rem; }
.toast { position: fixed; z-index: 150; right: 1rem; bottom: 1rem; padding: .65rem .85rem; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface-raised); box-shadow: 0 10px 30px rgb(0 0 0 / 16%); color: var(--text); font-size: .78rem; }

.theme-transitioning, .theme-transitioning * { transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease); }

@media (max-width: 959px) {
  .site-header { grid-template-columns: 1fr minmax(12rem, 22rem) 1fr; }
  .page-shell { max-width: calc(var(--sidebar-width) + var(--content-width)); grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width)); }
  .toc { display: none; }
}

@media (max-width: 759px) {
  .site-header { grid-template-columns: auto minmax(0, 1fr) auto; gap: .6rem; padding: 0 .75rem; }
  .nav-trigger { display: inline-grid; }
  .search-trigger { width: 36px; justify-content: center; padding: 0; border-color: transparent; }
  .search-trigger span, .search-trigger kbd { display: none; }
  .page-shell { display: block; margin-top: var(--header-height); }
  .sidebar { position: fixed; z-index: 70; top: var(--header-height); bottom: 0; left: 0; width: min(var(--sidebar-width), calc(100vw - 3rem)); height: auto; padding: 0 1rem 2rem; border-right: 1px solid var(--border); transform: translateX(-105%); transition: transform .22s var(--ease); }
  .sidebar.is-open { transform: translateX(0); }
  .sidebar-mobile-head { min-height: 3.6rem; display: flex; align-items: center; justify-content: space-between; margin: 0 -1rem 1rem; padding: 0 .75rem 0 1rem; border-bottom: 1px solid var(--border); font-weight: 600; }
  main { padding: 2.5rem clamp(1rem, 5vw, 2rem) 4rem; }
  h1 { font-size: clamp(2.25rem, 12vw, 2.8rem); }
  .page-turns { grid-template-columns: 1fr; }
  .page-turn--next { text-align: left; }
}

@media (max-width: 520px) {
  .header-cta, .header-actions > .icon-button:first-child { display: none; }
  .header-actions { gap: .1rem; }
  .locale-menu__trigger { width: 36px; justify-content: center; padding: 0; }
  .locale-menu__label { display: none; }
  .locale-menu__trigger::before { content: "文"; font: 600 .8rem/1 var(--font-sans); }
  .search-dialog { width: calc(100% - 1rem); max-height: calc(100vh - 1rem); margin-top: .5rem; }
  .search-help { display: none; }
  .api-contract dl { grid-template-columns: 1fr; gap: .25rem; }
  .api-contract dd + dt { margin-top: .5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}
.icon-button:active, .theme-toggle:active, .locale-menu__trigger:active, .locale-menu__option:active, .nav-item:active, .page-turn:active, .search-result:active { background: var(--control-pressed); }