/* Self-hosted fonts (latin subsets), font-display: optional = zero CLS. */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: optional;
  src: url('/assets/fonts/inter-400.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: optional;
  src: url('/assets/fonts/inter-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: optional;
  src: url('/assets/fonts/inter-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url('/assets/fonts/inter-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Outfit';
  font-style: normal;
  font-weight: 500;
  font-display: optional;
  src: url('/assets/fonts/outfit-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Outfit';
  font-style: normal;
  font-weight: 600;
  font-display: optional;
  src: url('/assets/fonts/outfit-600.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Outfit';
  font-style: normal;
  font-weight: 700;
  font-display: optional;
  src: url('/assets/fonts/outfit-700.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Poppins';
  font-style: normal;
  font-weight: 500;
  font-display: optional;
  src: url('/assets/fonts/poppins-500.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* IsonAI Docs — docs.isonai.com
   Brand tokens mirror the IsonAI app: warm near-black dark theme, bronze accent,
   Inter body + Outfit display + Poppins wordmark. Light and dark, WCAG 2.2 AA. */

:root {
  --font-b: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-d: 'Outfit', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-w: 'Poppins', system-ui, sans-serif;
  --font-c: ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, Consolas, monospace;

  --bg-0: #fafafa;
  --bg-1: #ffffff;
  --bg-2: #f4f4f5;
  --bg-3: #ececed;
  --line: #e4e4e7;
  --line-soft: #ededf0;
  --ink: #1c1d18;
  --ink-soft: #44453d;
  --ink-mute: #6d6e65;
  --ac: #8E8170;
  --ac-strong: #6b5d48;
  --ac-dim: rgba(142, 129, 112, 0.10);
  --link: #6b5d48;
  --kbd-bg: #f4f4f5;
  --code-bg: #f4f3ef;
  --mark-cur: rgba(142, 129, 112, 0.14);
  --shadow: 0 12px 40px rgba(28, 29, 24, 0.14);

  --c-key: #7a5230;
  --c-str: #56633a;
  --c-num: #8a4a2f;
  --c-com: #8b897e;
}

[data-theme="dark"] {
  --bg-0: #121310;
  --bg-1: #171814;
  --bg-2: #1a1b17;
  --bg-3: #22231e;
  --line: #2a2b26;
  --line-soft: #22231e;
  --ink: #e9e7de;
  --ink-soft: #c2c0b4;
  --ink-mute: #8f8d81;
  --ac: #A89878;
  --ac-strong: #c3b28d;
  --ac-dim: rgba(154, 137, 104, 0.12);
  --link: #c3b28d;
  --kbd-bg: #22231e;
  --code-bg: #1a1b17;
  --mark-cur: rgba(168, 152, 120, 0.16);
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.5);

  --c-key: #d0a878;
  --c-str: #a8b784;
  --c-num: #d09a78;
  --c-com: #8f8d81;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-0: #121310;
    --bg-1: #171814;
    --bg-2: #1a1b17;
    --bg-3: #22231e;
    --line: #2a2b26;
    --line-soft: #22231e;
    --ink: #e9e7de;
    --ink-soft: #c2c0b4;
    --ink-mute: #8f8d81;
    --ac: #A89878;
    --ac-strong: #c3b28d;
    --ac-dim: rgba(154, 137, 104, 0.12);
    --link: #c3b28d;
    --kbd-bg: #22231e;
    --code-bg: #1a1b17;
    --mark-cur: rgba(168, 152, 120, 0.16);
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    --c-key: #d0a878;
    --c-str: #a8b784;
    --c-num: #d09a78;
    --c-com: #8f8d81;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  font-family: var(--font-b);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  background: var(--bg-0);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible {
  outline: 2px solid var(--ac-strong);
  outline-offset: 2px;
  border-radius: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 200;
  background: var(--bg-1);
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.skip-link:focus { left: 8px; }

/* ---------------- topbar ---------------- */
#topbar {
  position: sticky;
  top: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 54px;
  padding: 0 14px;
  background: color-mix(in srgb, var(--bg-0) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
#nav-toggle, #theme-toggle, #search-trigger-mobile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
}
#nav-toggle:hover, #theme-toggle:hover, #search-trigger-mobile:hover {
  background: var(--bg-2);
}
.tb-brand { display: inline-flex; align-items: center; gap: 8px; }
.tb-brand img { border-radius: 6px; }
.brand-name {
  font-family: var(--font-w);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: 0.2px;
  color: var(--ink);
}
.brand-docs {
  font-family: var(--font-d);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ac-strong);
  margin-left: 2px;
  position: relative;
  top: 1px;
}
.tb-actions { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; }
.lang-switch {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 6px 11px;
  white-space: nowrap;
}
.lang-switch:hover { background: var(--bg-2); text-decoration: none; }
/* Theme icon: show the theme you would switch TO. Default/light -> moon. */
.ic-sun { display: none; }
.ic-moon { display: inline; }
[data-theme="dark"] .ic-moon { display: none; }
[data-theme="dark"] .ic-sun { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .ic-moon { display: none; }
  :root:not([data-theme="light"]) .ic-sun { display: inline; }
}

/* ---------------- shell grid ---------------- */
#shell {
  display: grid;
  grid-template-columns: 274px minmax(0, 1fr);
  max-width: 1360px;
  margin: 0 auto;
}
@media (min-width: 1240px) {
  #shell { grid-template-columns: 274px minmax(0, 1fr) 230px; }
}

/* ---------------- sidebar ---------------- */
#sidebar {
  position: sticky;
  top: 54px;
  height: calc(100vh - 54px);
  overflow-y: auto;
  padding: 18px 14px 28px 18px;
  border-right: 1px solid var(--line-soft);
  scrollbar-width: thin;
}
#sidebar .brand { display: flex; align-items: center; gap: 9px; margin: 2px 4px 16px; }
#sidebar .brand img { border-radius: 7px; }

.search-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  margin-bottom: 18px;
  font-family: inherit;
  font-size: 13px;
  color: var(--ink-mute);
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
}
.search-trigger:hover { border-color: var(--ac); }
.search-trigger kbd {
  margin-left: auto;
  font-family: inherit;
  font-size: 10.5px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--kbd-bg);
  color: var(--ink-mute);
}

.nav-group { margin-bottom: 4px; }
.nav-group summary {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 8px;
  font-family: var(--font-d);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border-radius: 8px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary:hover { color: var(--ink); background: var(--bg-2); }
.nav-group summary .chev { margin-left: auto; transition: transform 0.15s; }
.nav-group[open] summary .chev { transform: rotate(180deg); }
.nav-group ul { list-style: none; margin: 2px 0 8px; padding: 0 0 0 8px; }
.nav-group li a {
  display: block;
  padding: 6px 10px;
  font-size: 13.5px;
  color: var(--ink-soft);
  border-left: 2px solid var(--line-soft);
  border-radius: 0 8px 8px 0;
}
.nav-group li a:hover { color: var(--ink); background: var(--bg-2); text-decoration: none; }
.nav-group li a[aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--ac);
  background: var(--ac-dim);
}
.side-foot {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.side-foot a { font-size: 12.5px; color: var(--ink-mute); }
.side-foot a:hover { color: var(--link); }

#nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(0, 0, 0, 0.45);
}

/* ---------------- main / article ---------------- */
#main {
  min-width: 0;
  padding: 30px clamp(18px, 4vw, 56px) 40px;
}
#page-content { max-width: 760px; }

.crumbs { font-size: 12.5px; margin-bottom: 14px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; margin: 0; padding: 0; }
.crumbs li { color: var(--ink-mute); }
.crumbs li + li::before { content: "/"; margin: 0 6px 0 2px; color: var(--line); }
.crumbs a { color: var(--ink-mute); }
.crumbs a:hover { color: var(--link); }
.crumbs [aria-current="page"] { color: var(--ink-soft); }

#page-content h1 {
  font-family: var(--font-d);
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 14px;
}
#page-content h2 {
  font-family: var(--font-d);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 42px 0 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 72px;
}
#page-content h3 {
  font-family: var(--font-d);
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 8px;
  scroll-margin-top: 72px;
}
#page-content h2 a, #page-content h3 a { color: inherit; }
#page-content h2 a:hover, #page-content h3 a:hover { text-decoration: none; }
#page-content h2 a:hover::after, #page-content h3 a:hover::after {
  content: "#";
  color: var(--ac);
  margin-left: 8px;
  font-weight: 400;
}
#page-content p { margin: 0 0 14px; }
/* In-content links: underlined so they don't rely on color alone (WCAG 1.4.1) */
#page-content p a, #page-content li a, #page-content td a {
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--link) 55%, transparent);
  text-underline-offset: 3px;
}
#page-content p a:hover, #page-content li a:hover, #page-content td a:hover {
  text-decoration-color: var(--link);
}
#page-content ul, #page-content ol { margin: 0 0 14px; padding-left: 24px; }
#page-content li { margin-bottom: 6px; }
#page-content li > ul, #page-content li > ol { margin-top: 6px; }
#page-content strong { color: var(--ink); font-weight: 600; }
#page-content blockquote {
  margin: 18px 0;
  padding: 12px 18px;
  border-left: 3px solid var(--ac);
  background: var(--ac-dim);
  border-radius: 0 10px 10px 0;
  color: var(--ink-soft);
}
#page-content blockquote p:last-child { margin-bottom: 0; }
#page-content hr { border: 0; border-top: 1px solid var(--line); margin: 30px 0; }

#page-content :not(pre) > code {
  font-family: var(--font-c);
  font-size: 0.86em;
  background: var(--code-bg);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1px 5px;
  color: var(--ink);
  overflow-wrap: anywhere;
}
#page-content pre {
  position: relative;
  margin: 16px 0;
  padding: 14px 16px;
  background: var(--code-bg);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
}
#page-content pre code { font-family: var(--font-c); background: none; border: 0; padding: 0; }
.hl .k, .hl .kn, .hl .kd { color: var(--c-key); }
.hl .s, .hl .s1, .hl .s2 { color: var(--c-str); }
.hl .m, .hl .mi, .hl .mf { color: var(--c-num); }
.hl .c, .hl .c1, .hl .cm { color: var(--c-com); font-style: italic; }

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  font-family: var(--font-b);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-mute);
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 4px 9px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s;
}
#page-content pre:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--ink); }

.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: 12px; }
#page-content table { border-collapse: collapse; width: 100%; font-size: 14px; }
.table-wrap table { margin: 0; }
#page-content th, #page-content td {
  text-align: left;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
#page-content th {
  font-family: var(--font-d);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--bg-2);
}
#page-content tr:last-child td { border-bottom: 0; }

.verified {
  margin-top: 34px;
  font-size: 12px;
  color: var(--ink-mute);
}

/* ---------------- pager + footer ---------------- */
.pager {
  display: flex;
  gap: 12px;
  max-width: 760px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}
.pager a {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  min-width: 0;
}
.pager a:hover { border-color: var(--ac); text-decoration: none; background: var(--ac-dim); }
.pager a span { font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-mute); }
.pager a strong { font-size: 14px; color: var(--ink); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pager-next { text-align: right; margin-left: auto; }

#foot {
  max-width: 760px;
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  color: var(--ink-mute);
}
#foot p { margin: 0 0 6px; }
#foot a { color: var(--ink-mute); }
#foot a:hover { color: var(--link); }

/* ---------------- toc ---------------- */
#toc {
  display: none;
  position: sticky;
  top: 54px;
  height: calc(100vh - 54px);
  overflow-y: auto;
  padding: 30px 18px 30px 6px;
  font-size: 12.5px;
  scrollbar-width: thin;
}
@media (min-width: 1240px) { #toc { display: block; } }
.toc-title {
  font-family: var(--font-d);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 10px;
}
#toc ul { list-style: none; margin: 0; padding: 0; }
#toc li { margin: 0; }
#toc a {
  display: block;
  padding: 4px 10px;
  color: var(--ink-mute);
  border-left: 2px solid var(--line-soft);
}
#toc li.lv3 a { padding-left: 22px; }
#toc a:hover { color: var(--ink); text-decoration: none; }
#toc a.current { color: var(--ac-strong); border-left-color: var(--ac); font-weight: 600; }

/* ---------------- search modal ---------------- */
.search-overlay { position: fixed; inset: 0; z-index: 120; }
.search-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.5); }
.search-modal {
  position: relative;
  max-width: 620px;
  margin: 9vh auto 0;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.search-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-mute);
}
#search-input {
  flex: 1;
  border: 0;
  outline: 0;
  background: none;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
}
.search-input-wrap kbd, .search-foot kbd {
  font-family: inherit;
  font-size: 10.5px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--kbd-bg);
  color: var(--ink-mute);
}
.search-results { max-height: 52vh; overflow-y: auto; padding: 6px; }
.search-results .hit {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
}
.search-results .hit .h-group { font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-mute); }
.search-results .hit .h-title { font-size: 14px; font-weight: 600; color: var(--ink); }
.search-results .hit .h-snip { font-size: 12.5px; color: var(--ink-mute); overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.search-results .hit mark { background: var(--mark-cur); color: var(--ac-strong); border-radius: 3px; padding: 0 1px; }
.search-results .hit:hover, .search-results .hit.sel { background: var(--bg-2); text-decoration: none; }
.search-results .none { padding: 18px 14px; font-size: 13.5px; color: var(--ink-mute); }
.search-foot {
  display: flex;
  gap: 16px;
  padding: 10px 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 11.5px;
  color: var(--ink-mute);
}

/* ---------------- landing / 404 ---------------- */
body.landing { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.landing-wrap { text-align: center; padding: 40px 22px; max-width: 640px; }
.landing-brand { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 22px; }
.landing-brand img { border-radius: 12px; }
.landing-word .brand-name { font-size: 34px; }
.landing-word .brand-docs { font-size: 15px; }
.landing-lede { font-size: 17px; color: var(--ink-soft); margin: 0 0 30px; }
.landing-lede-en { color: var(--ink-mute); font-size: 15px; }
.nf-title { font-family: var(--font-d); font-size: 56px; margin: 0 0 8px; color: var(--ink); }
.landing-doors { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 30px; }
.door {
  flex: 1 1 240px;
  max-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  text-align: left;
}
.door strong { font-family: var(--font-d); font-size: 16.5px; color: var(--ink); }
.door span { font-size: 13px; color: var(--ink-mute); }
.door:hover { border-color: var(--ac); background: var(--ac-dim); text-decoration: none; }
.door.suggested { border-color: var(--ac); box-shadow: 0 0 0 1px var(--ac); }
.landing-foot { font-size: 13px; color: var(--ink-mute); }

/* ---------------- responsive ---------------- */
@media (max-width: 1023px) {
  #shell { grid-template-columns: minmax(0, 1fr); }
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 80;
    width: min(310px, 86vw);
    height: 100vh;
    background: var(--bg-1);
    border-right: 1px solid var(--line);
    transform: translateX(-102%);
    transition: transform 0.18s ease;
  }
  body.nav-open #sidebar { transform: translateX(0); }
  body.nav-open { overflow: hidden; }
}
@media (min-width: 1024px) {
  #nav-toggle, .tb-brand, #search-trigger-mobile { display: none; }
  #nav-scrim { display: none !important; }
}
@media (max-width: 480px) {
  body { font-size: 15px; }
  #main { padding-top: 20px; }
  .pager { flex-direction: column; }
  .pager-next { text-align: left; margin-left: 0; }
  .lang-switch { font-size: 11.5px; padding: 5px 8px; }
  #topbar { padding: 0 10px; gap: 6px; }
  .tb-actions { gap: 4px; }
  .tb-brand { min-width: 0; }
}
@media (max-width: 419px) {
  /* logo-only brand so hamburger + search + language + theme always fit */
  .tb-brand .brand-name, .tb-brand .brand-docs { display: none; }
}

@media print {
  #topbar, #sidebar, #toc, .pager, .search-overlay, .copy-btn { display: none !important; }
  #shell { display: block; }
  body { background: #fff; color: #000; }
}