:root {
    color-scheme: light;
    --header-h: 56px;
    --sidebar-w: 282px;
    --toc-w: 238px;
    --article-w: 800px;
    --bg: #ffffff;
    --surface: #ffffff;
    --surface-alt: #f7f7f8;
    --surface-hover: #f0f1f2;
    --text: #27282c;
    --muted: #6c707e;
    --faint: #8b8e98;
    --border: #dfe1e5;
    --border-soft: #eceef0;
    --link: #167dff;
    --link-hover: #005fcc;
    --accent: #6b57ff;
    --accent-soft: #efedff;
    --selection: #d9eaff;
    --code-bg: #f6f7f8;
    --code-toolbar: #eff1f3;
    --code-text: #2b2d30;
    --code-border: #dfe1e5;
    --callout-note: #e8f2ff;
    --callout-tip: #e7f8ef;
    --callout-warning: #fff4d6;
    --callout-danger: #ffe8e6;
    --success: #208a55;
    --warning: #a55b00;
    --danger: #c43e34;
    --shadow: 0 6px 24px rgba(39, 40, 44, .10);
    --font: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --bg: #1e1f22;
        --surface: #1e1f22;
        --surface-alt: #2b2d30;
        --surface-hover: #33353a;
        --text: #f0f1f2;
        --muted: #b4b7c0;
        --faint: #8f939e;
        --border: #393b40;
        --border-soft: #303238;
        --link: #6ea8fe;
        --link-hover: #93bdff;
        --accent: #a99cff;
        --accent-soft: #37324f;
        --selection: #29486f;
        --code-bg: #2b2d30;
        --code-toolbar: #25272a;
        --code-text: #f0f1f2;
        --code-border: #3d3f44;
        --callout-note: #26384e;
        --callout-tip: #243d31;
        --callout-warning: #44371e;
        --callout-danger: #482c2b;
        --success: #73d6a2;
        --warning: #f0bd66;
        --danger: #ff8d86;
        --shadow: 0 8px 30px rgba(0, 0, 0, .28);
    }
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #1e1f22;
    --surface: #1e1f22;
    --surface-alt: #2b2d30;
    --surface-hover: #33353a;
    --text: #f0f1f2;
    --muted: #b4b7c0;
    --faint: #8f939e;
    --border: #393b40;
    --border-soft: #303238;
    --link: #6ea8fe;
    --link-hover: #93bdff;
    --accent: #a99cff;
    --accent-soft: #37324f;
    --selection: #29486f;
    --code-bg: #2b2d30;
    --code-toolbar: #25272a;
    --code-text: #f0f1f2;
    --code-border: #3d3f44;
    --callout-note: #26384e;
    --callout-tip: #243d31;
    --callout-warning: #44371e;
    --callout-danger: #482c2b;
    --success: #73d6a2;
    --warning: #f0bd66;
    --danger: #ff8d86;
    --shadow: 0 8px 30px rgba(0, 0, 0, .28);
}

:root[data-theme="light"] {
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 15px;
    line-height: 1.62;
    text-rendering: optimizeLegibility;
}

::selection {
    background: var(--selection);
}

a {
    color: var(--link);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
    text-underline-offset: 2px;
}

button, input {
    font: inherit;
}

button {
    color: inherit;
}

.skip-link {
    position: fixed;
    z-index: 1000;
    left: 12px;
    top: -64px;
    padding: 8px 12px;
    border-radius: 6px;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.skip-link:focus {
    top: 10px;
}

.ws-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    height: var(--header-h);
    display: grid;
    grid-template-columns: minmax(240px, var(--sidebar-w)) minmax(240px, 680px) 1fr;
    align-items: center;
    gap: 22px;
    padding: 0 18px;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
}

.header-left, .header-actions {
    display: flex;
    align-items: center;
    min-width: 0;
}

.header-actions {
    justify-content: flex-end;
    gap: 6px;
}

.header-link {
    display: inline-flex;
    align-items: center;
    height: 34px;
    padding: 0 11px;
    border: 1px solid transparent;
    border-radius: 7px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
}

.header-link:hover, .header-link[aria-current="page"] {
    border-color: var(--border);
    background: var(--surface-hover);
    color: var(--text);
    text-decoration: none;
}

.header-link[aria-current="page"] {
    border-color: color-mix(in srgb, var(--brand-blue) 34%, var(--border));
    color: var(--brand-blue);
}

.ws-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-size: 14px;
    font-weight: 650;
    white-space: nowrap;
}

.ws-brand:hover {
    color: var(--text);
    text-decoration: none;
}

.brand-glyph {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: linear-gradient(135deg, #ff7a00, #7c4dff 55%, #00b8d9);
    color: white;
    font-size: 14px;
    font-weight: 800;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25);
}

.icon-button {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 0;
    border-radius: 7px;
    background: transparent;
    cursor: pointer;
}

.icon-button:hover {
    background: var(--surface-hover);
}

.sidebar-toggle {
    display: none;
    margin-right: 4px;
}

.header-search {
    position: relative;
    width: 100%;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 34px;
    padding: 0 10px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: var(--surface-alt);
    color: var(--muted);
}

.search-box:focus-within {
    border-color: var(--link);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--link) 18%, transparent);
    background: var(--surface);
}

.search-box input {
    min-width: 0;
    flex: 1;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--text);
    font-size: 14px;
}

.search-box input::placeholder {
    color: var(--faint);
}

.search-box kbd {
    padding: 1px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--surface);
    color: var(--faint);
    font-family: var(--font);
    font-size: 11px;
    line-height: 18px;
}

.search-results {
    position: absolute;
    top: 42px;
    left: 0;
    right: 0;
    max-height: min(65vh, 520px);
    overflow: auto;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.search-results a {
    display: block;
    padding: 9px 10px;
    border-radius: 6px;
    color: var(--text);
}

.search-results a:hover, .search-results a[aria-selected="true"] {
    background: var(--surface-hover);
    text-decoration: none;
}

.search-results strong {
    display: block;
    font-size: 14px;
}

.search-results span {
    display: block;
    color: var(--muted);
    font-size: 12px;
}

.search-empty {
    padding: 14px;
    color: var(--muted);
    text-align: center;
}

.ws-shell {
    min-height: 100vh;
    padding-top: var(--header-h);
    display: grid;
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
}

.ws-sidebar {
    position: fixed;
    z-index: 60;
    top: var(--header-h);
    bottom: 0;
    left: 0;
    width: var(--sidebar-w);
    border-right: 1px solid var(--border);
    background: var(--surface);
}

.sidebar-scroll {
    height: 100%;
    overflow-y: auto;
    padding: 18px 14px 28px 18px;
    scrollbar-width: thin;
}

.topic-tree {
    font-size: 13.5px;
}

.nav-group {
    margin: 0 0 8px;
}

.nav-group summary {
    position: relative;
    list-style: none;
    padding: 7px 8px 7px 25px;
    border-radius: 6px;
    color: var(--muted);
    font-weight: 650;
    cursor: pointer;
    user-select: none;
}

.nav-group summary::-webkit-details-marker {
    display: none;
}

.nav-group summary::before {
    content: "›";
    position: absolute;
    left: 9px;
    top: 6px;
    font-size: 17px;
    transform-origin: center;
    transition: transform .15s ease;
}

.nav-group[open] summary::before {
    transform: rotate(90deg);
}

.nav-group summary:hover {
    background: var(--surface-hover);
    color: var(--text);
}

.nav-group-items {
    display: grid;
    margin: 2px 0 4px;
}

.nav-group-items a {
    position: relative;
    display: block;
    padding: 6px 8px 6px 25px;
    border-radius: 6px;
    color: var(--text);
    line-height: 1.35;
}

.nav-group-items a:hover {
    background: var(--surface-hover);
    text-decoration: none;
}

.nav-group-items a[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--text);
    font-weight: 650;
}

.nav-group-items a[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 50%;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    transform: translateY(-50%);
}

.ws-main {
    grid-column: 2;
    min-width: 0;
    padding: 38px 48px 72px;
}

.article {
    width: min(100%, var(--article-w));
    margin: 0 auto;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
    color: var(--muted);
    font-size: 12px;
}

.breadcrumbs a {
    color: var(--muted);
}

.article-header {
    margin-bottom: 32px;
}

.article-header h1 {
    margin: 0 0 10px;
    scroll-margin-top: calc(var(--header-h) + 20px);
    font-size: clamp(2rem, 4vw, 2.65rem);
    line-height: 1.12;
    letter-spacing: -.035em;
    font-weight: 720;
}

.article-header p {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.55;
}

.article-body > :first-child {
    margin-top: 0;
}

.article-body section {
    margin: 42px 0 0;
}

h2, h3, h4 {
    color: var(--text);
    line-height: 1.25;
    scroll-margin-top: calc(var(--header-h) + 20px);
}

h2 {
    margin: 42px 0 14px;
    font-size: 1.55rem;
    letter-spacing: -.02em;
    font-weight: 700;
}

h3 {
    margin: 26px 0 10px;
    font-size: 1.12rem;
    font-weight: 680;
}

h4 {
    margin: 22px 0 8px;
    font-size: 1rem;
}

p {
    margin: 12px 0;
}

.lead, .intro {
    color: var(--muted);
    font-size: 16.5px;
    line-height: 1.65;
}

ul, ol {
    padding-left: 1.55rem;
}

li {
    margin: 6px 0;
}

strong {
    font-weight: 680;
}

code {
    padding: .12em .35em;
    border-radius: 4px;
    background: var(--surface-alt);
    font-family: var(--mono);
    font-size: .88em;
}

hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 36px 0;
}

.hero-panel {
    padding: 24px 26px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: linear-gradient(145deg, var(--surface-alt), var(--surface));
}

.hero-panel .intro {
    margin-top: 0;
}

.page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.panel {
    min-width: 0;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
}

.panel:hover {
    border-color: color-mix(in srgb, var(--link) 38%, var(--border));
}

.panel h3 {
    margin: 0 0 6px;
    font-size: 15px;
}

.panel p {
    margin: 0;
    color: var(--muted);
    font-size: 13.5px;
}

.steps {
    counter-reset: ws-step;
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.step {
    position: relative;
    padding: 14px 16px 14px 52px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
}

.step::before {
    counter-increment: ws-step;
    content: counter(ws-step);
    position: absolute;
    left: 15px;
    top: 15px;
    display: grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 12px;
    font-weight: 800;
}

.step h3 {
    margin: 0 0 3px;
    font-size: 15px;
}

.step p {
    margin: 0;
    color: var(--muted);
    font-size: 13.5px;
}

.callout {
    position: relative;
    margin: 20px 0;
    padding: 14px 16px 14px 44px;
    border-radius: 8px;
    background: var(--callout-note);
}

.callout::before {
    content: "i";
    position: absolute;
    left: 16px;
    top: 15px;
    display: grid;
    place-items: center;
    width: 18px;
    height: 18px;
    border: 1.5px solid currentColor;
    border-radius: 50%;
    font-size: 11px;
    font-weight: 800;
}

.callout h3 {
    margin: 0 0 4px;
    font-size: 14px;
}

.callout p {
    margin: 0;
    font-size: 13.5px;
}

.callout-success {
    background: var(--callout-tip);
    color: var(--success);
}

.callout-success p, .callout-success h3 {
    color: var(--text);
}

.callout-warning {
    background: var(--callout-warning);
    color: var(--warning);
}

.callout-warning::before {
    content: "!";
}

.callout-warning p, .callout-warning h3 {
    color: var(--text);
}

.callout-danger {
    background: var(--callout-danger);
    color: var(--danger);
}

.callout-danger::before {
    content: "!";
}

.callout-danger p, .callout-danger h3 {
    color: var(--text);
}

.system-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin: 22px 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.system-facts div {
    padding: 13px 14px;
    border-right: 1px solid var(--border);
    background: var(--surface-alt);
}

.system-facts div:last-child {
    border-right: 0;
}

.system-facts span {
    display: block;
    margin-bottom: 3px;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.system-facts strong {
    display: block;
    font-size: 13px;
    line-height: 1.35;
}

.architecture-map {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 18px 0;
}

.map-root {
    grid-column: 1 / -1;
    padding: 10px;
    border-radius: 7px;
    background: var(--accent-soft);
    color: var(--text);
    text-align: center;
    font-weight: 700;
}

.map-column {
    display: grid;
    gap: 6px;
    padding: 13px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-alt);
}

.map-column strong {
    margin-bottom: 3px;
}

.map-column span {
    padding: 6px 8px;
    border-radius: 5px;
    background: var(--surface);
    color: var(--muted);
    font-size: 12px;
}

.table-wrap {
    overflow-x: auto;
    margin: 18px 0;
    border: 1px solid var(--border);
    border-radius: 8px;
}

table {
    width: 100%;
    min-width: 620px;
    border-collapse: collapse;
    background: var(--surface);
    font-size: 13.5px;
}

th, td {
    padding: 11px 13px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

th {
    background: var(--surface-alt);
    font-weight: 680;
}

tr:last-child td {
    border-bottom: 0;
}

.checklist {
    list-style: none;
    padding-left: 0;
}

.checklist li {
    position: relative;
    padding-left: 24px;
}

.checklist li::before {
    content: "✓";
    position: absolute;
    left: 1px;
    color: var(--success);
    font-weight: 800;
}

.code-block {
    position: relative;
    margin: 18px 0;
    border: 1px solid var(--code-border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--code-bg);
}

.code-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 36px;
    padding: 0 8px 0 14px;
    border-bottom: 1px solid var(--code-border);
    background: var(--code-toolbar);
    color: var(--muted);
    font-size: 11.5px;
}

.code-language {
    font-weight: 600;
}

.copy-button {
    padding: 4px 8px;
    border: 0;
    border-radius: 5px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 12px;
}

.copy-button:hover {
    background: var(--surface-hover);
    color: var(--text);
}

pre {
    margin: 0;
    overflow: auto;
    padding: 16px 18px;
    background: var(--code-bg);
    color: var(--code-text);
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.55;
    tab-size: 4;
}

pre code {
    display: block;
    min-width: max-content;
    padding: 0;
    background: transparent;
    color: inherit;
    font-size: inherit;
}

.token-comment {
    color: #7a828e;
    font-style: italic;
}

.token-keyword {
    color: #9b5de5;
}

.token-string {
    color: #278a4b;
}

.token-number {
    color: #c76b00;
}

.token-function {
    color: #006ed3;
}

.token-operator {
    color: #b33d69;
}

:root[data-theme="dark"] .token-comment {
    color: #8c939f;
}

:root[data-theme="dark"] .token-keyword {
    color: #c191ff;
}

:root[data-theme="dark"] .token-string {
    color: #8bd49c;
}

:root[data-theme="dark"] .token-number {
    color: #f4bf75;
}

:root[data-theme="dark"] .token-function {
    color: #6cb6ff;
}

:root[data-theme="dark"] .token-operator {
    color: #ff7ab2;
}

.article-pager {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.pager-link {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 13px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
}

.pager-link:hover {
    border-color: var(--link);
    text-decoration: none;
}

.pager-link span {
    color: var(--muted);
    font-size: 11px;
}

.pager-link strong {
    font-size: 13.5px;
}

.pager-next {
    grid-column: 2;
    text-align: right;
}

.ws-toc {
    position: fixed;
    z-index: 20;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    width: var(--toc-w);
    padding: 36px 24px 30px 10px;
    background: var(--surface);
}

.toc-sticky {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    max-height: calc(100vh - var(--header-h) - 56px);
    overflow: auto;
}

.toc-title {
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 650;
}

.toc-links {
    display: grid;
    border-left: 1px solid var(--border);
}

.toc-links a {
    margin-left: -1px;
    padding: 4px 0 4px 12px;
    border-left: 2px solid transparent;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.35;
}

.toc-links a:hover {
    color: var(--text);
    text-decoration: none;
}

.toc-links a.active {
    border-left-color: var(--accent);
    color: var(--text);
    font-weight: 600;
}

.toc-links a.toc-h1 {
    color: var(--text);
    font-weight: 600;
}

.toc-links a.toc-h3 {
    padding-left: 22px;
}

.ws-footer {
    margin-left: var(--sidebar-w);
    margin-right: var(--toc-w);
    padding: 22px 48px 32px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 12px;
    text-align: center;
}

.sidebar-backdrop {
    position: fixed;
    z-index: 55;
    inset: var(--header-h) 0 0;
    background: rgba(0, 0, 0, .42);
}

@media (max-width: 1180px) {
    :root {
        --toc-w: 0px;
    }

    .ws-shell {
        grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    }

    .ws-toc {
        display: none;
    }

    .ws-footer {
        margin-right: 0;
    }
}

@media (max-width: 820px) {
    .header-search {
        position: static;
    }

    .search-results {
        top: calc(var(--header-h) + 4px);
        left: 10px;
        right: 10px;
    }

    :root {
        --sidebar-w: 0px;
    }

    .ws-header {
        grid-template-columns: minmax(190px, auto) minmax(100px, 1fr) auto;
        gap: 10px;
        padding: 0 10px;
    }

    .sidebar-toggle {
        display: inline-grid;
    }

    .ws-brand span:last-child {
        display: none;
    }

    .search-box kbd {
        display: none;
    }

    .header-link {
        padding-inline: 8px;
        font-size: 12px;
    }

    .ws-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .ws-sidebar {
        width: min(84vw, 310px);
        transform: translateX(-100%);
        transition: transform .18s ease;
        box-shadow: var(--shadow);
    }

    body.sidebar-open .ws-sidebar {
        transform: translateX(0);
    }

    body.sidebar-open {
        overflow: hidden;
    }

    .ws-main {
        grid-column: 1;
        padding: 28px 20px 56px;
    }

    .ws-footer {
        margin-left: 0;
        padding-inline: 20px;
    }

    .system-facts {
        grid-template-columns: 1fr;
    }

    .system-facts div {
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }

    .system-facts div:last-child {
        border-bottom: 0;
    }

    .architecture-map {
        grid-template-columns: 1fr;
    }

    .map-root {
        grid-column: 1;
    }
}

@media (max-width: 520px) {
    .article-header h1 {
        font-size: 2rem;
    }

    .article-pager {
        grid-template-columns: 1fr;
    }

    .pager-next {
        grid-column: auto;
        text-align: left;
    }

    .hero-panel {
        padding: 19px;
    }

    pre {
        font-size: 12px;
        padding: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
}

/* The Gameface chapter intentionally carries a larger reference surface. */
body[data-page="gameface-overlays.html"] .article {
    max-width: 980px;
}

body[data-page="gameface-overlays.html"] .article-header p {
    max-width: 860px;
}

/* Documentation metadata */
.doc-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.doc-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 9px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-alt);
    color: var(--muted);
    font-size: 11.5px;
}

.doc-meta-item strong {
    color: var(--text);
    font-weight: 650;
}

/* Build-scoped evidence for exact, version-sensitive client contracts. */
.evidence-note {
    margin: 18px 0 24px;
    padding: 12px 14px;
    border: 1px solid color-mix(in srgb, var(--accent) 34%, var(--border));
    border-left: 3px solid var(--accent);
    border-radius: 8px;
    background: color-mix(in srgb, var(--accent-soft) 48%, var(--surface));
}

.evidence-note-title {
    margin: 0 0 8px;
    color: var(--text);
    font-size: 12px;
    font-weight: 750;
    letter-spacing: .045em;
    text-transform: uppercase;
}

.evidence-note[data-version-sensitive] .evidence-note-title::after,
.contract-marker {
    display: inline-flex;
    margin-left: 8px;
    padding: 2px 6px;
    border: 1px solid color-mix(in srgb, var(--warning) 42%, var(--border));
    border-radius: 999px;
    color: var(--warning);
    font-size: 9.5px;
    font-weight: 750;
    letter-spacing: .02em;
    line-height: 1.3;
    text-transform: uppercase;
    vertical-align: middle;
}

.evidence-note[data-version-sensitive] .evidence-note-title::after {
    content: "Recheck after client update";
}

.contract-marker {
    margin: 0 4px;
}

.evidence-note dl {
    display: grid;
    grid-template-columns: max-content minmax(0, 1fr);
    gap: 4px 12px;
    margin: 0;
    font-size: 12px;
    line-height: 1.45;
}

.evidence-note dt {
    color: var(--muted);
    font-weight: 650;
}

.evidence-note dd {
    margin: 0;
    color: var(--text);
}

.related-pages {
    margin: 16px 0 22px;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 560px) {
    .evidence-note dl {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .evidence-note dd + dt {
        margin-top: 5px;
    }
}

/* Code example classification */
.code-toolbar-main {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.example-type {
    display: inline-flex;
    align-items: center;
    padding: 2px 7px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .02em;
    white-space: nowrap;
}

/* Lightweight diagrams */
.diagram-section {
    margin: 34px 0;
}

.architecture-diagram, .layer-diagram {
    display: grid;
    gap: 12px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-alt);
}

.diagram-branches {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.diagram-node, .flow-node, .layer {
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: var(--surface);
    text-align: center;
}

.diagram-node small, .flow-node small {
    display: block;
    margin-top: 5px;
    color: var(--muted);
}

.diagram-primary {
    border-color: var(--accent);
    background: var(--accent-soft);
    font-weight: 700;
}

.flow-diagram {
    display: flex;
    align-items: center;
    gap: 9px;
    overflow-x: auto;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface-alt);
}

.flow-diagram > span {
    color: var(--faint);
    font-size: 18px;
    flex: 0 0 auto;
}

.flow-node {
    min-width: 105px;
    flex: 1 0 auto;
}

.flow-wrap {
    flex-wrap: wrap;
    overflow: visible;
}

.layer-diagram {
    max-width: 620px;
    margin-inline: auto;
}

.layer {
    margin-inline: auto;
    width: min(100%, 520px);
}

.layer-top {
    width: min(80%, 420px);
    border-color: var(--success);
}

.layer-bottom {
    width: min(100%, 620px);
    border-color: var(--warning);
}

.diagram-caption {
    margin-top: 10px;
    color: var(--muted);
    text-align: center;
}

.id-diagram {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

/* Filterable API map */
.api-filter {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 12px;
    align-items: center;
    margin-bottom: 16px;
}

.api-filter label {
    grid-column: 1 / -1;
    color: var(--muted);
    font-size: 12px;
    font-weight: 650;
}

.api-filter input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
}

.api-filter input:focus {
    outline: 2px solid var(--selection);
    border-color: var(--link);
}

.api-filter-count {
    color: var(--muted);
    font-size: 12px;
    white-space: nowrap;
}

.table-scroll {
    overflow-x: auto;
}

.api-map-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 1120px;
}

.api-map-table th, .api-map-table td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.api-map-table th {
    background: var(--surface-alt);
    font-size: 12px;
}

.api-map-table tr[hidden] {
    display: none !important;
}

.status-badge {
    display: inline-flex;
    padding: 3px 7px;
    border-radius: 999px;
    font-size: 10.5px;
    font-weight: 700;
    white-space: nowrap;
}

.status-verify {
    background: var(--callout-note);
    color: var(--link-hover);
}

.status-verified {
    background: var(--callout-success);
    color: var(--success);
}

.status-sensitive {
    background: var(--callout-warning);
    color: var(--warning);
}

.status-danger {
    background: var(--callout-danger);
    color: var(--danger);
}

.status-historical {
    background: var(--surface-hover);
    color: var(--muted);
}

.api-empty {
    padding: 18px;
    text-align: center;
    color: var(--muted);
}

.api-empty[hidden] {
    display: none !important;
}

@media (max-width: 720px) {
    .diagram-branches, .id-diagram {
        grid-template-columns: 1fr;
    }

    .flow-wrap {
        flex-direction: column;
        align-items: stretch;
    }

    .flow-wrap > span {
        transform: rotate(90deg);
        text-align: center;
    }

    .api-filter {
        grid-template-columns: 1fr;
    }
}

/* Shared Discord community action */
.discord-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 34px;
    margin-right: 6px;
    padding: 0 11px;
    border: 1px solid color-mix(in srgb, #5865f2 55%, var(--border));
    border-radius: 7px;
    background: color-mix(in srgb, #5865f2 13%, var(--surface));
    color: var(--text);
    font-size: 13px;
    font-weight: 680;
    line-height: 1;
    white-space: nowrap;
    transition: background .15s ease, border-color .15s ease, transform .15s ease;
}

.discord-button:hover {
    border-color: #5865f2;
    background: color-mix(in srgb, #5865f2 22%, var(--surface));
    color: var(--text);
    text-decoration: none;
    transform: translateY(-1px);
}

.discord-button:focus-visible {
    outline: 2px solid color-mix(in srgb, #5865f2 70%, white);
    outline-offset: 2px;
}

.discord-icon {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
    fill: #5865f2;
}

@media (max-width: 880px) {
    .discord-button {
        width: 34px;
        padding: 0;
    }

    .discord-label {
        display: none;
    }
}

.gameface-topic-grid {
    margin: 1.5rem 0 2rem;
}

.gameface-topic-grid .topic-card {
    min-height: 8rem;
}

/* Nested documentation categories */
.nav-subgroup {
    margin: 2px 0;
}

.nav-subgroup > summary {
    position: relative;
    list-style: none;
    padding: 6px 8px 6px 38px;
    border-radius: 6px;
    color: var(--muted);
    font-weight: 650;
    cursor: pointer;
    user-select: none;
}

.nav-subgroup > summary::-webkit-details-marker {
    display: none;
}

.nav-subgroup > summary::before {
    content: "›";
    position: absolute;
    left: 24px;
    top: 5px;
    font-size: 16px;
    transition: transform .15s ease;
}

.nav-subgroup[open] > summary::before {
    transform: rotate(90deg);
}

.nav-subgroup > summary:hover {
    background: var(--surface-hover);
    color: var(--text);
}

.nav-subgroup-items {
    display: grid;
}

.nav-subgroup-items > a {
    padding-left: 42px;
}

.nav-subgroup-items > a[aria-current="page"]::before {
    left: 25px;
}


/* 2026 visual identity and beginner onboarding */
:root {
    --brand-ink: #182033;
    --brand-orange: #f07a2a;
    --brand-blue: #3976f6;
    --brand-cyan: #35b9c7;
    --brand-gradient: linear-gradient(135deg, var(--brand-orange), #e05276 48%, var(--brand-blue));
    --hero-glow: radial-gradient(circle at 18% 10%, color-mix(in srgb, var(--brand-orange) 14%, transparent), transparent 34%), radial-gradient(circle at 82% 0%, color-mix(in srgb, var(--brand-blue) 14%, transparent), transparent 36%);
}

:root[data-theme="dark"] {
    --brand-ink: #f4f6fb;
    --hero-glow: radial-gradient(circle at 18% 10%, rgba(240, 122, 42, .13), transparent 34%), radial-gradient(circle at 82% 0%, rgba(57, 118, 246, .15), transparent 36%);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --brand-ink: #f4f6fb;
        --hero-glow: radial-gradient(circle at 18% 10%, rgba(240, 122, 42, .13), transparent 34%), radial-gradient(circle at 82% 0%, rgba(57, 118, 246, .15), transparent 36%);
    }
}

body {
    background-image: var(--hero-glow);
    background-attachment: fixed;
}

.ws-header {
    box-shadow: 0 1px 0 color-mix(in srgb, var(--brand-blue) 7%, transparent);
}

.ws-brand {
    gap: 11px;
    letter-spacing: -.01em;
}

.brand-glyph {
    width: 31px;
    height: 31px;
    border-radius: 9px;
    background: var(--brand-gradient);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .28), 0 5px 14px rgba(57, 118, 246, .18);
}

.brand-copy {
    display: grid;
    line-height: 1.05;
}

.brand-title {
    font-size: 13.5px;
    font-weight: 760;
}

.brand-subtitle {
    margin-top: 3px;
    color: var(--muted);
    font-size: 9.5px;
    font-weight: 650;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.nav-group > summary {
    letter-spacing: .015em;
}

.nav-group > summary::after {
    content: "";
    position: absolute;
    right: 8px;
    bottom: 4px;
    left: 25px;
    height: 1px;
    background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 28%, transparent), transparent);
    opacity: .55;
}

.article-header {
    position: relative;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--border-soft);
}

.article-header::before {
    content: "";
    display: block;
    width: 44px;
    height: 4px;
    margin-bottom: 17px;
    border-radius: 999px;
    background: var(--brand-gradient);
}

.article-header h1 {
    color: var(--brand-ink);
}

.page-kicker {
    margin-bottom: 8px;
    color: var(--brand-blue);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .11em;
    text-transform: uppercase;
}

.page-level {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    margin-top: 16px;
}

.level-pill, .time-pill {
    display: inline-flex;
    align-items: center;
    min-height: 25px;
    padding: 0 9px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-alt);
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
}

.level-pill::before {
    content: "";
    width: 6px;
    height: 6px;
    margin-right: 6px;
    border-radius: 50%;
    background: var(--brand-blue);
}

.level-beginner::before {
    background: var(--success);
}

.level-reference::before {
    background: var(--brand-orange);
}

.hero-panel {
    position: relative;
    overflow: hidden;
    padding: 30px;
    border-color: color-mix(in srgb, var(--brand-blue) 19%, var(--border));
    border-radius: 15px;
    background: linear-gradient(145deg, color-mix(in srgb, var(--surface) 95%, var(--brand-blue)), color-mix(in srgb, var(--surface-alt) 94%, var(--brand-orange)));
    box-shadow: 0 18px 45px rgba(32, 50, 90, .07);
}

.hero-panel::after {
    content: "";
    position: absolute;
    width: 180px;
    height: 180px;
    right: -75px;
    top: -90px;
    border-radius: 50%;
    background: var(--brand-gradient);
    opacity: .09;
    pointer-events: none;
}

.hero-eyebrow {
    margin: 0 0 8px;
    color: var(--brand-blue);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.hero-title {
    max-width: 690px;
    margin: 0 0 12px;
    font-size: clamp(1.55rem, 3vw, 2.1rem);
    line-height: 1.15;
    letter-spacing: -.025em;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.button-primary, .button-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 39px;
    padding: 0 14px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 740;
}

.button-primary {
    background: var(--brand-gradient);
    color: #fff;
    box-shadow: 0 8px 22px rgba(57, 118, 246, .18);
}

.button-primary:hover {
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
}

.button-secondary {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
}

.button-secondary:hover {
    border-color: var(--brand-blue);
    color: var(--text);
    text-decoration: none;
}

.learning-path {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 13px;
    margin: 18px 0 0;
}

.path-card {
    position: relative;
    min-width: 0;
    padding: 18px 17px 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: color-mix(in srgb, var(--surface) 96%, transparent);
}

.path-card::before {
    content: attr(data-step);
    display: grid;
    place-items: center;
    width: 27px;
    height: 27px;
    margin-bottom: 12px;
    border-radius: 8px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 12px;
    font-weight: 800;
}

.path-card h3 {
    margin: 0 0 6px;
    font-size: 15px;
}

.path-card p {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
}

.path-card a::after {
    content: " →";
}

.beginner-callout {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: start;
    margin: 22px 0;
    padding: 18px;
    border: 1px solid color-mix(in srgb, var(--success) 32%, var(--border));
    border-radius: 12px;
    background: color-mix(in srgb, var(--callout-tip) 72%, var(--surface));
}

.beginner-icon {
    display: grid;
    place-items: center;
    width: 35px;
    height: 35px;
    border-radius: 10px;
    background: var(--surface);
    color: var(--success);
    font-weight: 900;
    box-shadow: inset 0 0 0 1px var(--border);
}

.beginner-callout h2, .beginner-callout h3 {
    margin: 0 0 5px;
    font-size: 16px;
}

.beginner-callout p {
    margin: 0;
    color: var(--muted);
}

.panel {
    border-radius: 11px;
    transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}

.panel:hover {
    transform: translateY(-2px);
    box-shadow: 0 9px 24px rgba(32, 50, 90, .07);
}

.panel h3 a {
    color: var(--text);
}

.step {
    border-radius: 11px;
}

.step::before {
    background: var(--brand-gradient);
    color: white;
}

.callout {
    border-radius: 11px;
}

.article-pager {
    margin-top: 55px;
}

.pager-link {
    border-radius: 12px;
}

.pager-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(32, 50, 90, .08);
}

.code-block, pre {
    border-radius: 10px;
}

.ws-footer {
    background: color-mix(in srgb, var(--surface-alt) 90%, transparent);
}

@media (max-width: 760px) {
    .brand-subtitle {
        display: none;
    }

    .learning-path {
        grid-template-columns: 1fr;
    }

    .hero-panel {
        padding: 23px 20px;
    }
}

/* Difficulty and page-type classification */
.page-level {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    align-items: center;
}

.level-pill, .type-pill {
    display: inline-flex;
    align-items: center;
    min-height: 1.65rem;
    padding: .18rem .62rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .02em;
    border: 1px solid transparent;
}

.level-beginner {
    background: color-mix(in srgb, #34a853 15%, transparent);
    color: #23833d;
    border-color: color-mix(in srgb, #34a853 35%, transparent);
}

.level-intermediate {
    background: color-mix(in srgb, #2f7de1 14%, transparent);
    color: #2367bd;
    border-color: color-mix(in srgb, #2f7de1 34%, transparent);
}

.level-advanced {
    background: color-mix(in srgb, #f29b38 16%, transparent);
    color: #b9690d;
    border-color: color-mix(in srgb, #f29b38 38%, transparent);
}

.level-expert {
    background: color-mix(in srgb, #bd4bd6 15%, transparent);
    color: #9136a5;
    border-color: color-mix(in srgb, #bd4bd6 36%, transparent);
}

.type-pill {
    background: var(--surface-2, rgba(127, 127, 127, .09));
    color: var(--text-secondary, inherit);
    border-color: var(--border-color, rgba(127, 127, 127, .22));
    font-weight: 600;
}

.type-pill::before {
    content: 'Type';
    margin-right: .35rem;
    opacity: .58;
    font-size: .67rem;
    text-transform: uppercase;
    letter-spacing: .06em;
}

.loader-check {
    margin: 1.75rem 0;
    padding: 1.35rem 1.45rem;
    border: 1px solid color-mix(in srgb, #34a853 34%, var(--border-color, transparent));
    border-left: 4px solid #34a853;
    border-radius: 14px;
    background: linear-gradient(135deg, color-mix(in srgb, #34a853 8%, transparent), transparent 72%);
}

.loader-check h2 {
    margin-top: 0;
}

.compact-steps {
    margin-bottom: 1rem;
}


/* Difficulty navigation filter */
.difficulty-filter {
    margin: 0 0 14px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: linear-gradient(145deg, color-mix(in srgb, var(--surface-alt) 92%, var(--accent) 8%), var(--surface));
    box-shadow: 0 8px 22px color-mix(in srgb, var(--text) 5%, transparent);
}

.difficulty-filter-heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 9px;
}

.difficulty-filter-heading > span:first-child {
    color: var(--text);
    font-size: 12px;
    font-weight: 750;
    letter-spacing: .055em;
    text-transform: uppercase;
}

.difficulty-filter-count {
    color: var(--faint);
    font-size: 11px;
    white-space: nowrap;
}

.difficulty-filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.difficulty-filter-button {
    min-height: 28px;
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--muted);
    font: inherit;
    font-size: 11px;
    font-weight: 650;
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease, color .15s ease, transform .15s ease;
}

.difficulty-filter-button:hover {
    border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
    color: var(--text);
    transform: translateY(-1px);
}

.difficulty-filter-button.active {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--text);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 18%, transparent);
}

.difficulty-filter-button.difficulty-beginner.active {
    border-color: #3d9b68;
    background: color-mix(in srgb, #3d9b68 14%, var(--surface));
}

.difficulty-filter-button.difficulty-intermediate.active {
    border-color: #397bc1;
    background: color-mix(in srgb, #397bc1 14%, var(--surface));
}

.difficulty-filter-button.difficulty-advanced.active {
    border-color: #b87817;
    background: color-mix(in srgb, #b87817 15%, var(--surface));
}

.difficulty-filter-button.difficulty-expert.active {
    border-color: #a94dc1;
    background: color-mix(in srgb, #a94dc1 14%, var(--surface));
}

.difficulty-filter-select-label {
    display: none;
    gap: 7px;
    align-items: center;
    color: var(--muted);
    font-size: 12px;
}

.difficulty-filter-select {
    flex: 1;
    min-width: 0;
    padding: 7px 28px 7px 9px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: var(--surface);
    color: var(--text);
    font: inherit;
}

.nav-group-items a.filter-current-exception {
    display: block;
    opacity: .58;
    border: 1px dashed color-mix(in srgb, var(--accent) 42%, var(--border));
}

.nav-group-items a.filter-current-exception::after {
    content: "Current";
    float: right;
    margin-left: 6px;
    color: var(--faint);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.search-result-difficulty {
    display: inline-flex;
    width: fit-content;
    margin-top: 4px;
    padding: 2px 6px;
    border-radius: 999px;
    background: var(--surface-alt);
    color: var(--muted);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.search-result-difficulty.level-expert {
    color: #a94dc1;
}

.search-result-difficulty.level-advanced {
    color: #b87817;
}

.search-result-difficulty.level-intermediate {
    color: #397bc1;
}

.search-result-difficulty.level-beginner {
    color: #3d9b68;
}

@media (max-width: 760px) {
    .difficulty-filter-buttons {
        display: none;
    }

    .difficulty-filter-select-label {
        display: flex;
    }

    .difficulty-filter {
        margin-bottom: 12px;
    }
}

/* Difficulty filtering must override the navigation link layout rules. */
.topic-tree a[hidden],
.topic-tree details[hidden] {
    display: none !important;
}


/* Documentation discovery and utility controls */
.difficulty-filter-explanation {
    margin: -2px 0 10px;
    color: var(--faint);
    font-size: 11px;
    line-height: 1.4;
}

.discovery-filtered,
.path-card[hidden],
a.topic-card[hidden],
.page-grid > a[hidden] {
    display: none !important;
}

.heading-permalink {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.45em;
    height: 1.45em;
    margin-left: .35rem;
    border-radius: 6px;
    color: var(--faint);
    font-size: .72em;
    font-weight: 700;
    text-decoration: none;
    opacity: 0;
    vertical-align: .08em;
    transition: opacity .15s ease, color .15s ease, background .15s ease;
}

.article-body h2:hover .heading-permalink,
.article-body h3:hover .heading-permalink,
.heading-permalink:focus-visible,
.heading-permalink.copied {
    opacity: 1;
}

.heading-permalink:hover,
.heading-permalink:focus-visible {
    color: var(--accent);
    background: var(--accent-soft);
}

@media (hover: none) {
    .heading-permalink {
        opacity: .65;
    }
}

.difficulty-legend {
    margin: 1.35rem 0 1.8rem;
    padding: 1.15rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: linear-gradient(145deg, color-mix(in srgb, var(--surface-alt) 92%, var(--accent) 8%), var(--surface));
}

.difficulty-legend h2 {
    margin-top: 0;
    margin-bottom: .35rem;
    font-size: 1.15rem;
}

.difficulty-legend > p {
    margin: 0 0 .9rem;
    color: var(--muted);
}

.difficulty-legend-items {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .65rem .9rem;
}

.difficulty-legend-items > span {
    display: grid;
    grid-template-columns: max-content 1fr;
    align-items: center;
    gap: .55rem;
    color: var(--muted);
    font-size: .82rem;
    line-height: 1.4;
}

.legend-dot {
    display: inline-flex;
    padding: .16rem .48rem;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: .7rem;
}

@media (max-width: 760px) {
    .difficulty-legend-items {
        grid-template-columns: 1fr;
    }

    .heading-permalink {
        opacity: .65;
    }
}


.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Accessibility contrast comparison build */
:root {
    --muted: #4b5563;
    --faint: #5f6673;
    --border: #c8cdd5;
    --border-soft: #dfe3e8;
    --link: #075fc7;
    --link-hover: #004a9f;
    --accent: #5b45e8;
    --accent-soft: #e8e5ff;
    --success: #166534;
    --warning: #92400e;
    --danger: #a12622;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --muted: #c7ccd4;
        --faint: #aeb6c1;
        --border: #555c66;
        --border-soft: #424851;
        --link: #8bc1ff;
        --link-hover: #b7d9ff;
        --accent: #c0b8ff;
        --accent-soft: #3b3557;
    }
}

:root[data-theme="dark"] {
    --muted: #c7ccd4;
    --faint: #aeb6c1;
    --border: #555c66;
    --border-soft: #424851;
    --link: #8bc1ff;
    --link-hover: #b7d9ff;
    --accent: #c0b8ff;
    --accent-soft: #3b3557;
}

.search-box input::placeholder {
    color: var(--faint);
    opacity: 1;
}

/* Stronger light-theme syntax colors. */
.token-comment {
    color: #59636e;
}

.token-keyword {
    color: #6f42c1;
}

.token-string {
    color: #0a6b3f;
}

.token-number {
    color: #9a3412;
}

.token-function {
    color: #075fc7;
}

.token-operator {
    color: #9f2458;
}

/* Solid, high-contrast classification colors. */
.level-beginner,
.legend-dot.level-beginner {
    color: #166534;
    background: #e5f6eb;
    border-color: #78b98e;
}

.level-intermediate,
.legend-dot.level-intermediate {
    color: #1d4ed8;
    background: #e8f0ff;
    border-color: #8eafea;
}

.level-advanced,
.legend-dot.level-advanced {
    color: #92400e;
    background: #fff0d8;
    border-color: #d8a15b;
}

.level-expert,
.legend-dot.level-expert {
    color: #7e22ce;
    background: #f4e8ff;
    border-color: #bd8de2;
}

.type-pill {
    color: var(--muted);
    border-color: var(--border);
    background: var(--surface-alt);
}

.status-verify {
    color: #075fc7;
}

.status-sensitive {
    color: #92400e;
}

.status-danger {
    color: #a12622;
}

.status-historical {
    color: var(--muted);
}

.search-result-difficulty.level-expert {
    color: #7e22ce;
}

.search-result-difficulty.level-advanced {
    color: #92400e;
}

.search-result-difficulty.level-intermediate {
    color: #1d4ed8;
}

.search-result-difficulty.level-beginner {
    color: #166534;
}

/* Keep compact interface text readable at its small size. */
.brand-subtitle,
.system-facts span,
.code-toolbar,
.toc-title,
.toc-links a,
.pager-link span,
.difficulty-filter-count,
.difficulty-filter-explanation,
.nav-group-items a.filter-current-exception::after {
    color: var(--muted);
}

/* Clear keyboard focus across all interactive controls. */
:where(a, button, input, select, summary):focus-visible {
    outline: 3px solid var(--link);
    outline-offset: 2px;
}


/* Footer and changelog */
.ws-footer {
    text-align: left;
}

.footer-inner {
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    gap: 10px;
}

.footer-main {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px 24px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.footer-links a {
    color: var(--link);
    text-decoration: none;
}

.footer-links a:hover, .footer-links a:focus-visible {
    text-decoration: underline;
}

.footer-note {
    margin: 0;
    color: var(--muted);
}

.changelog-entry {
    position: relative;
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.changelog-entry:first-of-type {
    border-top: 0;
}

.changelog-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.changelog-heading time {
    font-weight: 700;
    color: var(--text);
}

.changelog-tag {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 2px 9px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    background: var(--surface-alt);
    font-size: 12px;
    font-weight: 700;
}

.changelog-entry h2 {
    margin-top: 0;
}

.changelog-entry ul {
    margin-bottom: 0;
}

@media (max-width: 720px) {
    .footer-main {
        display: grid;
    }
}


/* Repair pass: normalize legacy helper classes used by older generated pages. */
.callout-note, .callout-info {
    background: var(--callout-note);
    color: var(--text);
}

.callout-info::before {
    content: "i";
}

.callout-tip {
    background: var(--callout-tip);
    color: var(--text);
}

.callout-tip::before {
    content: "✓";
}

.beginner-route {
    margin: 34px 0;
}

.beginner-checkpoint {
    border: 1px solid color-mix(in srgb, var(--brand-blue) 26%, var(--border));
    border-radius: 13px;
    padding: 18px;
    background: color-mix(in srgb, var(--surface-alt) 80%, transparent);
}

.button-link {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface-alt);
    color: var(--link);
    font-size: 13px;
    font-weight: 720;
    text-decoration: none;
}

.button-link:hover {
    border-color: var(--link);
    color: var(--link-hover);
    text-decoration: none;
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}