:root {
    --vp-navy: #274463;
    --vp-navy-deep: #1a3245;
    --vp-orange: #FF8700;
    --vp-blue: #0047BA;
    --vp-blue-hover: #003d9e;
    --vp-blue-tint: rgba(0, 71, 186, 0.08);

    --vp-text: #000000;
    --vp-text-secondary: #555B5A;
    --vp-text-faint: #8a8f8e;
    --vp-border: #dadce0;
    --vp-bg: #f8f9fa;
    --vp-white: #ffffff;
    --vp-error: #dc3545;
    --vp-error-bg: #fee2e2;
    --vp-error-border: #fecaca;
    --vp-code-bg: #f1f3f4;

    --vp-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --vp-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --vp-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    --header-h: 60px;
    --side-w: 300px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
    font-family: var(--font-family);
    color: var(--vp-text);
    background: var(--vp-white);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
#app { min-height: 100vh; display: flex; flex-direction: column; }

a { color: var(--vp-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
button,
a {
    touch-action: manipulation;
}
button:focus-visible,
textarea:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid var(--vp-orange);
    outline-offset: 2px;
}
.skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 1001;
    transform: translateY(-150%);
    background: var(--vp-white);
    color: var(--vp-navy);
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 700;
    box-shadow: var(--vp-shadow-md);
}
.skip-link:focus {
    transform: translateY(0);
    text-decoration: none;
}

/* ---------- Header ---------- */
header.topbar {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: var(--vp-navy);
    border-bottom: 1px solid var(--vp-navy-deep);
    display: flex;
    align-items: center;
    padding: 0 22px;
    gap: 16px;
    z-index: 100;
    color: var(--vp-white);
}
.brand {
    display: flex;
    align-items: center;
}
.brand img {
    height: 22px;
    width: auto;
    display: block;
}
.manual-switch {
    display: flex;
    align-items: center;
    gap: 2px;
    overflow-x: auto;
    min-width: 0;
    scrollbar-width: none;
}
.manual-switch::-webkit-scrollbar { display: none; }
.manual-switch a {
    padding: 6px 12px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 13px;
    white-space: nowrap;
    border-radius: 4px;
}
.manual-switch a.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--vp-white);
    font-weight: 500;
}
.manual-switch a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--vp-white);
    text-decoration: none;
}
.manual-more { flex: 0 0 auto; }
.manual-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: rgba(255, 255, 255, 0.75);
    font-family: inherit;
    font-size: 13px;
    line-height: 1.6;
    white-space: nowrap;
    cursor: pointer;
}
.manual-more-btn:hover,
.manual-more-btn[aria-expanded="true"] {
    background: rgba(255, 255, 255, 0.1);
    color: var(--vp-white);
}
.manual-more-btn svg {
    width: 12px;
    height: 12px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.manual-more-menu {
    position: fixed;
    z-index: 115;
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 200px;
    max-width: min(280px, calc(100vw - 24px));
    padding: 6px;
    background: var(--vp-white);
    border: 1px solid var(--vp-border);
    border-radius: 8px;
    box-shadow: var(--vp-shadow-lg);
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity .14s ease, transform .14s ease;
}
.manual-more-menu.on {
    opacity: 1;
    transform: translateY(0);
}
.manual-more-menu[hidden] { display: none; }
.manual-more-menu a {
    padding: 8px 12px;
    border-radius: 6px;
    color: var(--vp-text-secondary);
    font-size: 13px;
    white-space: nowrap;
}
.manual-more-menu a:hover {
    background: #f3f6f8;
    color: var(--vp-navy);
    text-decoration: none;
}
.manual-more-menu a.active {
    background: #f3f6f8;
    color: var(--vp-navy);
    font-weight: 600;
}
@media (max-width: 768px) {
    .manual-more-menu { display: none !important; }
}
@media (prefers-reduced-motion: reduce) {
    .manual-more-menu { transition: none; }
}
.search-wrap {
    margin-left: auto;
    position: relative;
    width: clamp(240px, 28vw, 380px);
    /* Hold width on desktop so tabs fold into "More" instead of squeezing search;
       this also keeps the overflow measurement stable. Mobile overrides below. */
    flex: 0 0 auto;
}
.search-wrap input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    font-size: 13px;
    outline: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--vp-white);
    font-family: inherit;
}
.search-wrap input::placeholder { color: rgba(255, 255, 255, 0.55); }
.search-wrap input:focus {
    background: var(--vp-white);
    color: var(--vp-text);
    border-color: var(--vp-orange);
    box-shadow: 0 0 0 3px rgba(255, 135, 0, 0.25);
}
.search-wrap input:focus::placeholder { color: var(--vp-text-faint); }
.mobile-menu-toggle,
.mobile-manual-nav {
    display: none;
}
.topbar .nav-download {
    flex: 0 0 auto;
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    padding: 6px 12px;
    border-radius: 4px;
    white-space: nowrap;
}
.topbar .nav-download:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--vp-white);
    text-decoration: none;
}
.topbar .nav-download.active {
    background: rgba(255, 255, 255, 0.15);
    color: var(--vp-white);
    font-weight: 500;
}
.topbar .auth-btn {
    flex: 0 0 auto;
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    padding: 6px 12px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 6px;
    white-space: nowrap;
}
.topbar .auth-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--vp-white);
    text-decoration: none;
}

/* ---------- Layout ---------- */
.layout {
    display: flex;
    padding-top: var(--header-h);
    flex: 1 0 auto;
}
aside.sidebar {
    width: var(--side-w);
    flex-shrink: 0;
    border-right: 1px solid var(--vp-border);
    background: var(--vp-bg);
    height: calc(100vh - var(--header-h));
    overflow-y: auto;
    position: sticky;
    top: var(--header-h);
    padding: 24px 0;
}
aside.sidebar .toc-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--vp-text-faint);
    padding: 0 24px 10px;
    font-weight: 600;
}
aside.sidebar ul { list-style: none; padding: 0; margin: 0; }
aside.sidebar a {
    display: block;
    padding: 4px 24px;
    color: var(--vp-text-secondary);
    font-size: 13px;
    line-height: 1.45;
}
aside.sidebar a:hover {
    background: var(--vp-white);
    color: var(--vp-navy);
    text-decoration: none;
}
aside.sidebar a.active {
    color: var(--vp-navy);
    background: var(--vp-white);
    font-weight: 650;
}
aside.sidebar li.lvl-2 a { padding-left: 36px; font-size: 12.5px; }
aside.sidebar li.lvl-3 a { padding-left: 48px; font-size: 12px; color: var(--vp-text-faint); }
aside.sidebar li.lvl-4 a { padding-left: 60px; font-size: 11.5px; color: var(--vp-text-faint); }

main.content {
    flex: 1;
    padding: 36px 56px 80px;
    max-width: 980px;
    width: 100%;
    margin-inline: auto;
}
main.content h1 {
    color: var(--vp-navy);
    font-size: 28px;
    font-weight: 600;
    margin: 32px 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--vp-border);
    scroll-margin-top: 122px;
    text-wrap: balance;
}
main.content h2 {
    color: var(--vp-navy);
    font-size: 22px;
    font-weight: 600;
    margin: 28px 0 12px;
    scroll-margin-top: 122px;
    text-wrap: balance;
}
main.content h3 {
    color: var(--vp-navy);
    font-size: 17px;
    font-weight: 600;
    margin: 22px 0 10px;
    scroll-margin-top: 122px;
    text-wrap: balance;
}
main.content h4 {
    color: var(--vp-text-secondary);
    font-size: 15px;
    font-weight: 600;
    margin: 18px 0 8px;
    scroll-margin-top: 122px;
}
main.content h1:first-child { margin-top: 0; }
main.content p { margin: 10px 0; }
main.content ul, main.content ol { padding-left: 26px; }
main.content li { margin: 4px 0; }
main.content table {
    border-collapse: separate;
    border-spacing: 0;
    margin: 0;
    width: 100%;
    font-size: 13.5px;
    background: var(--vp-white);
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    overflow: hidden;
}
.table-scroll {
    width: 100%;
    margin: 18px 0 22px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.table-scroll table {
    min-width: min(100%, 680px);
}
.dl-panel {
    margin: 24px 0 6px;
    border: 1px solid var(--vp-border);
    border-radius: 12px;
    background: var(--vp-white);
    box-shadow: var(--vp-shadow-md);
    overflow: hidden;
}
.dl-item {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 20px 22px;
}
.dl-file { flex: none; color: var(--vp-navy); }
.dl-meta { flex: 1; min-width: 0; }
.dl-name { font-weight: 650; font-size: 15px; color: var(--vp-text); }
.dl-sub { font-size: 13px; color: var(--vp-text-secondary); margin-top: 3px; }
.dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: none;
    background: var(--vp-navy);
    color: var(--vp-white);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 13.5px;
    font-weight: 600;
    white-space: nowrap;
}
.dl-btn:hover { background: var(--vp-navy-deep); text-decoration: none; }
.dl-note { color: var(--vp-text-secondary); font-size: 13.5px; margin-top: 20px; }
.dl-hash {
    border-top: 1px solid var(--vp-border);
    padding: 13px 22px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.dl-hash-label {
    flex: none;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--vp-text-faint);
}
.dl-hash code {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 11.5px;
    color: var(--vp-navy);
    background: var(--vp-code-bg);
    padding: 3px 8px;
    border-radius: 4px;
    word-break: break-all;
}
main.content th, main.content td {
    border: 0;
    border-right: 1px solid var(--vp-border);
    border-bottom: 1px solid var(--vp-border);
    padding: 9px 12px;
    text-align: left;
    vertical-align: top;
}
main.content th:last-child,
main.content td:last-child { border-right: 0; }
main.content tr:last-child th,
main.content tr:last-child td { border-bottom: 0; }
main.content th {
    background: #f4f6f7;
    color: var(--vp-navy);
    font-weight: 650;
}
main.content img {
    max-width: 100%;
    height: auto;
    border: 1px solid #cfd4da;
    border-radius: 5px;
    margin: 12px 0;
    display: block;
}
.doc-figure {
    margin: 22px 0;
}
.doc-figure img {
    margin: 0;
}
main.content code {
    background: var(--vp-code-bg);
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 13px;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    color: var(--vp-navy);
}
main.content pre {
    margin: 14px 0;
    padding: 14px 16px;
    background: var(--vp-code-bg);
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.5;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
main.content pre code {
    background: none;
    padding: 0;
    font-size: inherit;
    color: var(--vp-text);
}
main.content blockquote {
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    margin: 12px 0;
    padding: 10px 14px;
    color: var(--vp-text-secondary);
    background: var(--vp-bg);
}

/* ---------- Manual information ---------- */
.doc-frontmatter {
    margin: 0 0 28px;
    border: 1px solid var(--vp-border);
    border-radius: 8px;
    background: #fbfcfd;
    overflow: hidden;
}
.doc-frontmatter summary {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2px 18px;
    align-items: center;
    padding: 16px 18px;
    cursor: pointer;
    list-style: none;
}
.doc-frontmatter summary::-webkit-details-marker,
.doc-frontmatter-panel summary::-webkit-details-marker,
.mobile-toc summary::-webkit-details-marker {
    display: none;
}
.doc-frontmatter > summary::after {
    content: "Show";
    grid-row: 1 / span 3;
    grid-column: 2;
    color: var(--vp-text-secondary);
    font-size: 12px;
    font-weight: 700;
}
.doc-frontmatter[open] > summary::after {
    content: "Hide";
}
.doc-frontmatter-kicker,
.doc-frontmatter-meta {
    color: var(--vp-text-secondary);
    font-size: 12px;
    line-height: 1.35;
}
.doc-frontmatter-kicker {
    font-weight: 600;
}
.doc-frontmatter-title {
    min-width: 0;
    color: var(--vp-navy);
    font-size: 17px;
    font-weight: 700;
    line-height: 1.3;
}
.doc-frontmatter-meta {
    min-width: 0;
}
.doc-frontmatter-body {
    padding: 0 18px 18px;
    border-top: 1px solid var(--vp-border);
    background: var(--vp-white);
}
.doc-meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 22px;
    padding: 18px 0;
}
.doc-meta-item span,
.doc-revision-latest span {
    display: block;
    margin-bottom: 4px;
    color: var(--vp-text-secondary);
    font-size: 12px;
    font-weight: 600;
}
.doc-meta-item p,
.doc-revision-latest p {
    margin: 0;
    color: var(--vp-text);
    font-size: 13.5px;
    line-height: 1.55;
}
.doc-revision-latest {
    margin-bottom: 14px;
    padding: 12px 14px;
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    background: #f8f9fa;
}
.doc-frontmatter-panel {
    border-top: 1px solid var(--vp-border);
}
.doc-frontmatter-panel summary {
    padding: 12px 0;
    color: var(--vp-navy);
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
}
.doc-frontmatter-panel > summary::after {
    content: "Show";
    float: right;
    color: var(--vp-text-secondary);
    font-size: 12px;
}
.doc-frontmatter-panel[open] > summary::after {
    content: "Hide";
}
.doc-frontmatter-panel-body {
    padding-bottom: 16px;
}
.doc-frontmatter-note {
    color: var(--vp-text-secondary);
    font-size: 13px;
}
.doc-frontmatter .content-table {
    margin: 0;
    font-size: 13px;
}

/* heading anchor links */
.anchor {
    margin-left: 8px;
    opacity: 0;
    color: var(--vp-text-faint);
    font-weight: normal;
    font-size: .8em;
    transition: opacity .15s;
}
h1:hover .anchor, h2:hover .anchor, h3:hover .anchor, h4:hover .anchor { opacity: 1; }
.anchor:hover { color: var(--vp-blue); text-decoration: none; }

/* search highlight */
mark { background: rgba(255, 135, 0, 0.25); color: var(--vp-text); padding: 0 2px; border-radius: 2px; }

/* ---------- Search results overlay ---------- */
.search-results {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 480px;
    max-height: calc(100vh - var(--header-h) - 40px);
    overflow-y: auto;
    background: var(--vp-white);
    border: 1px solid var(--vp-border);
    border-radius: 8px;
    box-shadow: var(--vp-shadow-lg);
    z-index: 90;
    display: none;
}
.search-results.on { display: block; }
.search-results .meta {
    padding: 10px 14px;
    border-bottom: 1px solid var(--vp-border);
    font-size: 12px;
    color: var(--vp-text-secondary);
    display: flex;
    justify-content: space-between;
    background: var(--vp-bg);
}
.search-results .meta button {
    background: none; border: 0; color: var(--vp-text-secondary);
    cursor: pointer; font-size: 12px; font-family: inherit;
}
.search-results .hit {
    padding: 12px 14px;
    border-bottom: 1px solid var(--vp-border);
    cursor: pointer;
    color: inherit;
    display: block;
}
.search-results .hit:hover,
.search-results .hit.is-active {
    background: #f3f6f8;
    text-decoration: none;
}
.search-results .hit:last-child { border-bottom: 0; }
.search-results .hit .hit-manual {
    font-size: 11.5px;
    color: var(--vp-text-secondary);
    font-weight: 600;
}
.search-results .hit .hit-head {
    font-weight: 600;
    color: var(--vp-navy);
    margin: 2px 0;
    font-size: 14px;
}
.search-results .hit .hit-path {
    color: var(--vp-text-faint);
    font-size: 11.5px;
    line-height: 1.35;
    margin-bottom: 3px;
    overflow-wrap: anywhere;
}
.search-results .hit .hit-snip {
    font-size: 12.5px;
    color: var(--vp-text-secondary);
    line-height: 1.5;
}

/* ---------- Documentation chat ---------- */
.chat-launcher {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 120;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: var(--vp-navy);
    color: var(--vp-white);
    border-radius: 999px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.22);
    padding: 9px 16px;
    min-height: 40px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform .16s ease, opacity .16s ease, background .16s ease;
}
.chat-launcher:hover {
    background: var(--vp-navy-deep);
}
.chat-launcher-icon {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.chat-launcher.is-open {
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
}
.chat-backdrop {
    position: fixed;
    inset: 0;
    z-index: 130;
    background: rgba(26, 50, 69, 0.28);
    opacity: 0;
    transition: opacity .16s ease;
}
.chat-backdrop.on {
    opacity: 1;
}
.chat-backdrop[hidden],
.chat-drawer[hidden] {
    display: none;
}
.chat-drawer {
    position: fixed;
    top: calc(var(--header-h) + 16px);
    right: 24px;
    bottom: 24px;
    z-index: 140;
    width: min(460px, calc(100vw - 48px));
    display: grid;
    grid-template-rows: auto 1fr auto;
    background: var(--vp-white);
    border: 1px solid var(--vp-border);
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(26, 50, 69, 0.24);
    overflow: hidden;
    transform: translateY(12px);
    opacity: 0;
    transition: transform .16s ease, opacity .16s ease;
}
.chat-drawer.on {
    transform: translateY(0);
    opacity: 1;
}
.chat-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 18px 16px;
    border-bottom: 1px solid var(--vp-border);
    background: var(--vp-white);
}
.chat-brand h2 {
    margin: 0;
    color: var(--vp-navy);
    font-size: 16px;
    line-height: 1.25;
    font-weight: 700;
}
.chat-brand p {
    margin: 3px 0 0;
    color: var(--vp-text-secondary);
    font-size: 12.5px;
    line-height: 1.4;
}
.chat-close {
    border: 1px solid var(--vp-border);
    background: var(--vp-white);
    color: var(--vp-text-secondary);
    border-radius: 6px;
    padding: 6px 10px;
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
}
.chat-close:hover {
    color: var(--vp-navy);
    border-color: var(--vp-navy);
}
.chat-messages {
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 18px;
    background: var(--vp-white);
}
.chat-message {
    max-width: 92%;
    margin-bottom: 14px;
}
.chat-message.user {
    margin-left: auto;
}
.chat-message-label {
    margin-bottom: 4px;
    color: var(--vp-text-faint);
    font-size: 11.5px;
    font-weight: 600;
}
.chat-message.user .chat-message-label {
    text-align: right;
}
.chat-message-body {
    border: 1px solid var(--vp-border);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--vp-text);
    background: var(--vp-bg);
    font-size: 13.5px;
    line-height: 1.55;
}
.chat-message.user .chat-message-body {
    background: var(--vp-navy);
    border-color: var(--vp-navy);
    color: var(--vp-white);
}
.chat-sources {
    display: grid;
    gap: 8px;
    margin-top: 10px;
}
.chat-source {
    display: block;
    padding: 9px 10px;
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    background: var(--vp-white);
    color: inherit;
}
.chat-source:hover {
    background: #f3f6f8;
    text-decoration: none;
}
.chat-source-title,
.chat-source-meta {
    display: block;
}
.chat-source-title {
    color: var(--vp-navy);
    font-size: 12.5px;
    font-weight: 700;
    line-height: 1.35;
}
.chat-source-meta {
    margin-top: 2px;
    color: var(--vp-text-secondary);
    font-size: 11.5px;
}
.chat-form {
    padding: 14px 18px 16px;
    border-top: 1px solid var(--vp-border);
    background: var(--vp-bg);
}
.chat-input-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: end;
}
.chat-input-row textarea {
    width: 100%;
    min-height: 70px;
    max-height: 160px;
    resize: vertical;
    border: 1px solid var(--vp-border);
    border-radius: 6px;
    padding: 10px 11px;
    color: var(--vp-text);
    background: var(--vp-white);
    font-family: inherit;
    font-size: 13.5px;
    line-height: 1.45;
}
.chat-input-row textarea::placeholder {
    color: var(--vp-text-faint);
}
.chat-input-row button {
    min-width: 78px;
    min-height: 42px;
    border: 0;
    border-radius: 6px;
    background: var(--vp-navy);
    color: var(--vp-white);
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
}
.chat-input-row button:hover {
    background: var(--vp-navy-deep);
}
.chat-input-row button:disabled,
.chat-input-row textarea:disabled {
    cursor: not-allowed;
    opacity: .65;
}
.chat-status {
    min-height: 18px;
    margin: 7px 0 0;
    color: var(--vp-text-secondary);
    font-size: 12px;
}

/* ---------- Landing page ---------- */
.landing {
    max-width: 900px;
    margin: 60px auto;
    padding: 0 24px;
    flex: 1 0 auto;
}
.landing h1 {
    color: var(--vp-navy);
    font-size: 32px;
    font-weight: 600;
    margin: 0 0 8px;
}
.landing .lead {
    color: var(--vp-text-secondary);
    font-size: 16px;
    margin-bottom: 36px;
}
.manual-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.manual-card {
    border: 1px solid var(--vp-border);
    border-radius: 8px;
    padding: 20px 22px;
    transition: border-color .15s ease;
    color: inherit;
    display: block;
    background: var(--vp-white);
}
.manual-card:hover {
    border-color: #9aa8b4;
    text-decoration: none;
}
.manual-card h3 { margin: 0 0 6px; font-size: 16px; color: var(--vp-navy); font-weight: 600; }
.manual-card p { margin: 0; font-size: 13px; color: var(--vp-text-secondary); line-height: 1.55; }

.breadcrumbs {
    position: sticky;
    top: var(--header-h);
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: -12px 0 18px;
    padding: 10px 0;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid rgba(218, 220, 224, 0.72);
    backdrop-filter: blur(10px);
    color: var(--vp-text-faint);
    font-size: 12px;
    font-weight: 600;
}
.breadcrumbs a {
    color: var(--vp-text-secondary);
}
.breadcrumbs a:hover {
    color: var(--vp-blue);
}
.breadcrumbs span::before {
    content: "/";
    margin-right: 8px;
    color: var(--vp-text-faint);
    font-weight: 400;
}
.mobile-toc {
    display: none;
}

@media (max-width: 768px) {
    aside.sidebar { display: none; }
    header.topbar {
        padding: 0 14px;
        gap: 10px;
    }
    main.content { padding: 24px 20px 96px; }
    .brand img { height: 20px; }
    .search-wrap {
        width: auto;
        flex: 1 1 auto;
        min-width: 120px;
    }
    .manual-switch { display: none; }
    .mobile-menu-toggle {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        border: 1px solid rgba(255, 255, 255, 0.26);
        border-radius: 6px;
        background: transparent;
        color: rgba(255, 255, 255, 0.9);
        padding: 6px 10px;
        font: inherit;
        font-size: 13px;
        cursor: pointer;
    }
    .mobile-menu-toggle:hover,
    .mobile-menu-toggle.is-open {
        background: rgba(255, 255, 255, 0.1);
        color: var(--vp-white);
    }
    .mobile-menu-toggle svg {
        width: 16px;
        height: 16px;
        fill: none;
        stroke: currentColor;
        stroke-width: 1.8;
        stroke-linecap: round;
    }
    .mobile-manual-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        z-index: 96;
        display: grid;
        gap: 1px;
        padding: 10px 14px;
        border-bottom: 1px solid var(--vp-border);
        background: var(--vp-white);
        box-shadow: var(--vp-shadow-md);
    }
    .mobile-manual-nav[hidden] {
        display: none;
    }
    .mobile-manual-nav a {
        display: block;
        padding: 11px 10px;
        border-radius: 6px;
        color: var(--vp-text-secondary);
        font-size: 14px;
        font-weight: 600;
    }
    .mobile-manual-nav a:hover,
    .mobile-manual-nav a.active {
        background: #f3f6f8;
        color: var(--vp-navy);
        text-decoration: none;
    }
    .mobile-toc {
        display: block;
        margin: 2px 0 22px;
        border: 1px solid var(--vp-border);
        border-radius: 8px;
        background: var(--vp-white);
    }
    .mobile-toc summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        padding: 12px 14px;
        cursor: pointer;
        list-style: none;
    }
    .mobile-toc summary::after {
        content: "Show";
        color: var(--vp-text-secondary);
        font-size: 12px;
        font-weight: 700;
    }
    .mobile-toc[open] summary::after {
        content: "Hide";
    }
    .mobile-toc-title {
        color: var(--vp-navy);
        font-size: 14px;
        font-weight: 700;
    }
    .mobile-toc-label {
        color: var(--vp-text-secondary);
        font-size: 12px;
        font-weight: 600;
    }
    .mobile-toc nav {
        border-top: 1px solid var(--vp-border);
        padding: 8px 0;
        max-height: min(56vh, 520px);
        overflow-y: auto;
    }
    .mobile-toc ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .mobile-toc a {
        display: block;
        padding: 7px 14px;
        color: var(--vp-text-secondary);
        font-size: 13px;
        line-height: 1.35;
    }
    .mobile-toc li.lvl-2 a { padding-left: 26px; }
    .mobile-toc li.lvl-3 a { padding-left: 38px; font-size: 12.5px; }
    .mobile-toc li.lvl-4 a { padding-left: 50px; font-size: 12px; }
    .search-results {
        position: fixed;
        top: var(--header-h);
        left: 12px;
        right: 12px;
        width: auto;
        max-height: calc(100dvh - var(--header-h) - 16px);
        z-index: 110;
    }
    .search-results .hit {
        padding: 14px 16px;
    }
    .doc-meta-grid {
        grid-template-columns: 1fr;
    }
    .chat-launcher {
        right: 16px;
        bottom: calc(16px + env(safe-area-inset-bottom));
    }
    .chat-drawer {
        top: auto;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: min(82vh, 720px);
        border-radius: 8px 8px 0 0;
    }
    .chat-header,
    .chat-form {
        padding-left: 16px;
        padding-right: 16px;
    }
    .chat-messages {
        padding: 16px;
    }
}

@media (max-width: 520px) {
    header.topbar {
        height: auto;
        min-height: var(--header-h);
        flex-wrap: wrap;
        padding-top: 8px;
        padding-bottom: 8px;
    }
    .brand {
        flex: 0 0 auto;
    }
    .mobile-menu-toggle {
        order: 2;
        flex: 1 1 auto;
        justify-content: center;
    }
    .search-wrap {
        order: 4;
        flex: 1 0 100%;
    }
    .layout {
        padding-top: calc(var(--header-h) + 45px);
    }
    .mobile-manual-nav {
        top: calc(var(--header-h) + 45px);
    }
    .breadcrumbs {
        top: calc(var(--header-h) + 45px);
    }
    .chat-input-row {
        grid-template-columns: 1fr;
    }
    .chat-input-row button {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .chat-backdrop,
    .chat-drawer,
    .anchor {
        transition: none;
    }
}

.site-footer {
    margin-top: auto; /* pin to the bottom when content is shorter than the viewport */
    position: sticky; /* stay visible at the viewport bottom while the page scrolls */
    bottom: 0;
    background: var(--vp-white);
    z-index: 40; /* above content, below the topbar (100) and chat UI (90+) */
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 28px;
    padding: 16px 190px 16px 32px; /* right inset clears the fixed chat launcher */
    border-top: 1px solid var(--vp-border);
    font-size: 12.5px;
    color: var(--vp-text-faint);
}
.site-footer a { color: var(--vp-text-faint); }
.site-footer a:hover { color: var(--vp-text-secondary); }
.site-footer nav { display: flex; gap: 20px; }