/* Source Serif 4 — self-hosted (no third-party requests), display use
         only. latin + latin-ext subsets; system serif fallback below keeps
         CLS negligible via metric-similar Iowan/Georgia. */
      @font-face {
        font-family: "Source Serif 4";
        font-style: normal; font-weight: 400; font-display: swap;
        src: url("/fonts/source-serif-4-latin-400-normal.woff2") format("woff2");
        unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
      }
      @font-face {
        font-family: "Source Serif 4";
        font-style: normal; font-weight: 600; font-display: swap;
        src: url("/fonts/source-serif-4-latin-600-normal.woff2") format("woff2");
        unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
      }
      @font-face {
        font-family: "Source Serif 4";
        font-style: normal; font-weight: 700; font-display: swap;
        src: url("/fonts/source-serif-4-latin-700-normal.woff2") format("woff2");
        unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
      }
      @font-face {
        font-family: "Source Serif 4";
        font-style: normal; font-weight: 400; font-display: swap;
        src: url("/fonts/source-serif-4-latin-ext-400-normal.woff2") format("woff2");
        unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
      }
      @font-face {
        font-family: "Source Serif 4";
        font-style: normal; font-weight: 600; font-display: swap;
        src: url("/fonts/source-serif-4-latin-ext-600-normal.woff2") format("woff2");
        unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
      }
      @font-face {
        font-family: "Source Serif 4";
        font-style: normal; font-weight: 700; font-display: swap;
        src: url("/fonts/source-serif-4-latin-ext-700-normal.woff2") format("woff2");
        unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
      }
      @charset "UTF-8";
      /* ==================================================================
         Design tokens. Every colour is annotated with its measured WCAG
         contrast ratio against the surface it is used on. Target: 2.2 AAA
         (7:1 body text). Editorial system: serif display over sans body,
         hairline rules, generous measure.
         ================================================================== */
      :root {
        --type-display: "Source Serif 4", "Iowan Old Style", Palatino, "New York", ui-serif, Georgia, serif;
        --type-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        --type-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

        --bg-page: #ffffff;
        --bg-alt: #f7f5f1;      /* warm paper for alternating bands */
        --bg-card: #fdfcfa;
        --ink: #1d1d1f;         /* 16.7:1 on #fff — AAA */
        --ink-soft: #3a3a3c;    /* 11.3:1 on #fff — AAA */
        --ink-mute: #4d4d55;    /*  8.4:1 on #fff, 7.8:1 on --bg-alt — AAA */
        --rule: #e4e1da;
        --rule-strong: #c9c5bb;

        --link: #0a5566;        /*  8.4:1 on #fff, 7.8:1 on --bg-alt — AAA teal */
        --link-hover: #073f4c;
        --eyebrow: #684d00;     /*  8.0:1 on #fff — AAA */
        --btn-bg: #1d1d1f;      /* white text on it: 16.7:1 — AAA */
        --btn-text: #ffffff;
        --focus-ring: #0a5566;

        --ok: #14532d;          /*  9.7:1 on #fff — AAA */
        --bad: #7f1d1d;         /*  9.9:1 on #fff — AAA */

        --code-bg: #14161c;
        --code-text: #f2f3f5;   /* 15.9:1 on #14161c — AAA */

        --shadow-sm: 0 1px 2px rgb(29 29 31 / 0.06);
        --shadow-md: 0 12px 32px -12px rgb(29 29 31 / 0.18);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-pill: 999px;
        --measure: 68ch;
      }

      [data-theme="dark"] {
        --bg-page: #0b0e14;
        --bg-alt: #10141c;
        --bg-card: #171b24;
        --ink: #f5f5f7;         /* 17.0:1 on #0b0e14 — AAA */
        --ink-soft: #d6d9e0;    /* 13.1:1 — AAA */
        --ink-mute: #b3bac7;    /*  9.2:1 on page, 8.6:1 on card — AAA */
        --rule: #262c38;
        --rule-strong: #3a4252;

        --link: #7fd4e8;        /* 11.5:1 on page, 10.8:1 on card — AAA teal */
        --link-hover: #b5e6f2;
        --eyebrow: #e3c878;     /* 10.5:1 on page — AAA */
        --btn-bg: #f5f5f7;
        --btn-text: #16181d;    /* 15.9:1 on #f5f5f7 — AAA */
        --focus-ring: #7fd4e8;

        --ok: #86efac;          /* 13.6:1 on page — AAA */
        --bad: #fca5a5;         /* 10.3:1 on page — AAA */

        --code-bg: #05070b;
        --code-text: #eef0f4;

        --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.6);
        --shadow-md: 0 12px 32px -12px rgb(0 0 0 / 0.7);
      }

      /* OS dark preference when no explicit choice is stored. */
      @media (prefers-color-scheme: dark) {
        html:not([data-theme="light"]) {
          --bg-page: #0b0e14;
          --bg-alt: #10141c;
          --bg-card: #171b24;
          --ink: #f5f5f7;
          --ink-soft: #d6d9e0;
          --ink-mute: #b3bac7;
          --rule: #262c38;
          --rule-strong: #3a4252;
          --link: #7fd4e8;
          --link-hover: #b5e6f2;
          --eyebrow: #e3c878;
          --btn-bg: #f5f5f7;
          --btn-text: #16181d;
          --focus-ring: #7fd4e8;
          --ok: #86efac;
          --bad: #fca5a5;
          --code-bg: #05070b;
          --code-text: #eef0f4;
          --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.6);
          --shadow-md: 0 12px 32px -12px rgb(0 0 0 / 0.7);
        }
      }

      @view-transition { navigation: auto; }

      *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

      html {
        font-family: var(--type-body);
        font-size: 16px;
        line-height: 1.65;
        color: var(--ink);
        background-color: var(--bg-page);
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
        text-rendering: optimizeLegibility;
      }

      body { min-height: 100vh; display: flex; flex-direction: column; }

      ::selection { background: var(--link); color: var(--bg-page); }

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

      @media (prefers-reduced-motion: reduce) {
        html { scroll-behavior: auto; }
        *, *::before, *::after {
          animation-duration: 0.01ms !important;
          animation-iteration-count: 1 !important;
          transition-duration: 0.01ms !important;
        }
      }

      @media (prefers-contrast: more) {
        :root, [data-theme="dark"] {
          --ink-soft: var(--ink);
          --ink-mute: var(--ink);
          --rule: var(--rule-strong);
        }
      }

      /* Reading progress — scroll-driven, zero JS, aria-hidden. */
      .progress {
        position: fixed;
        top: 0; left: 0;
        height: 3px; width: 100%;
        background: var(--link);
        transform-origin: 0 50%;
        transform: scaleX(0);
        z-index: 2000;
      }
      @supports (animation-timeline: scroll()) {
        .progress { animation: grow linear both; animation-timeline: scroll(root); }
        @keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }
      }

      .skip-link {
        position: absolute;
        top: -120px; left: 1rem;
        background: var(--btn-bg); color: var(--btn-text);
        padding: 0.8rem 1.6rem;
        z-index: 10000;
        border-radius: var(--radius-pill);
        font-weight: 600;
        transition: top 0.2s ease;
      }
      .skip-link:focus { top: 1rem; }
      .visually-hidden {
        position: absolute; width: 1px; height: 1px;
        overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
      }

      .wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 1.75rem; }

      /* ==== Navigation ==== */
      .nav-right { display: flex; align-items: center; gap: 0.6rem; }


      /* ==== Page header ==== */
      .page-header { padding: 4.5rem 0 2.75rem; border-bottom: 1px solid var(--rule); }
      .breadcrumb { font-size: 0.85rem; color: var(--ink-mute); margin-bottom: 2rem; }
      .breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; }
      .breadcrumb li + li::before { content: "\203A"; margin-right: 0.5rem; color: var(--ink-mute); }
      .breadcrumb a { color: var(--link); text-decoration: none; }
      .breadcrumb a:hover { text-decoration: underline; }
      .eyebrow {
        font-size: 0.8rem; font-weight: 700;
        letter-spacing: 0.14em; text-transform: uppercase;
        color: var(--eyebrow);
        margin-bottom: 1.1rem;
      }
      .page-title {
        font-family: var(--type-display);
        font-size: clamp(2.3rem, 4.5vw, 3.4rem);
        font-weight: 700;
        letter-spacing: -0.015em;
        line-height: 1.12;
        max-width: 26ch;
        margin-bottom: 1.25rem;
        overflow-wrap: break-word;
        text-wrap: balance;
      }
      .deck {
        font-size: 1.25rem;
        line-height: 1.55;
        color: var(--ink-soft);
        max-width: 58ch;
      }
      .article-meta {
        display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem;
        margin-top: 1.75rem;
        font-size: 0.85rem; color: var(--ink-mute);
      }

      /* ==== Article body ==== */
      .content-shell { padding: 3rem 0 2rem; }
      .content-body { font-size: 1.06rem; line-height: 1.75; max-width: var(--measure); }
      .content-body h2 {
        font-family: var(--type-display);
        font-size: 1.7rem; font-weight: 700; letter-spacing: -0.01em;
        line-height: 1.25;
        margin: 2.75rem 0 1rem;
        overflow-wrap: break-word;
      }
      .content-body h3 {
        font-size: 1.15rem; font-weight: 700;
        margin: 2rem 0 0.75rem;
      }
      .content-body h2:first-child { margin-top: 0; }
      .content-body p { margin-bottom: 1.4rem; color: var(--ink-soft); }
      .content-body ul, .content-body ol { margin: 0 0 1.4rem 1.6rem; color: var(--ink-soft); }
      .content-body li { margin-bottom: 0.55rem; }
      .content-body li::marker { color: var(--ink-mute); }
      .content-body a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
      .content-body a:hover { color: var(--link-hover); text-decoration-thickness: 2px; }
      .content-body strong { color: var(--ink); font-weight: 650; }
      .content-body blockquote {
        font-family: var(--type-display);
        font-size: 1.2rem; line-height: 1.55;
        border-left: 3px solid var(--eyebrow);
        padding: 0.35rem 0 0.35rem 1.5rem;
        margin: 2rem 0;
        color: var(--ink);
      }
      .content-body blockquote p { color: var(--ink); margin-bottom: 0.75rem; }
      .content-body blockquote p:last-child { margin-bottom: 0; }
      .content-body code {
        font-family: var(--type-mono);
        font-size: 0.86em;
        background: var(--bg-alt);
        color: var(--ink);
        padding: 0.15rem 0.45rem;
        border-radius: 6px;
        border: 1px solid var(--rule);
        overflow-wrap: break-word;
      }
      .content-body pre {
        background: var(--code-bg);
        color: var(--code-text);
        padding: 1.4rem 1.6rem;
        border-radius: var(--radius-md);
        overflow-x: auto;
        margin: 0 0 1.75rem;
        font-size: 0.92rem;
        line-height: 1.7;
        box-shadow: var(--shadow-sm);
      }
      .content-body pre code { background: transparent; color: inherit; padding: 0; border: none; font-size: 1em; }
      .content-body hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0; }

      /* Tables: hairline editorial on wide screens, labelled cards on narrow. */
      .content-body .table-responsive { overflow-x: auto; margin: 2rem 0; }
      .content-body table { width: 100%; border-collapse: collapse; font-size: 0.97rem; }
      .content-body th, .content-body td {
        padding: 0.9rem 1rem;
        border-bottom: 1px solid var(--rule);
        text-align: left; vertical-align: top;
      }
      .content-body thead th {
        font-size: 0.78rem; font-weight: 700;
        letter-spacing: 0.1em; text-transform: uppercase;
        color: var(--ink-mute);
        border-bottom: 2px solid var(--rule-strong);
      }
      .content-body td { color: var(--ink-soft); }
      @media (max-width: 720px) {
        .content-body table, .content-body tbody, .content-body tr, .content-body td { display: block; width: 100%; }
        .content-body thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
        .content-body tr { border: 1px solid var(--rule); border-radius: var(--radius-sm); margin-bottom: 1rem; padding: 0.5rem 0; }
        .content-body td { border-bottom: none; padding: 0.45rem 1rem; }
        .content-body td[data-label]::before {
          content: attr(data-label);
          display: block;
          font-size: 0.72rem; font-weight: 700;
          letter-spacing: 0.1em; text-transform: uppercase;
          color: var(--ink-mute);
          margin-bottom: 0.15rem;
        }
      }

      /* Contents block (injected at build for long pages). */
      .article-toc {
        border: 1px solid var(--rule);
        border-radius: var(--radius-md);
        background: var(--bg-card);
        padding: 1.4rem 1.6rem;
        margin: 0 0 2.5rem;
        max-width: var(--measure);
      }
      .article-toc h2 {
        font-family: var(--type-body);
        font-size: 0.8rem; font-weight: 700;
        letter-spacing: 0.14em; text-transform: uppercase;
        color: var(--ink-mute);
        margin: 0 0 0.75rem;
      }
      .article-toc ol { list-style: decimal-leading-zero; margin: 0 0 0 1.6rem; }
      .article-toc li { margin-bottom: 0.35rem; font-size: 0.95rem; }
      .article-toc li::marker { color: var(--ink-mute); font-size: 0.85em; }
      .article-toc a { color: var(--ink-soft); text-decoration: none; }
      .article-toc a:hover { color: var(--link); text-decoration: underline; }

      .heading-anchor {
        margin-left: 0.4rem;
        color: var(--ink-mute);
        text-decoration: none;
        opacity: 0;
        font-family: var(--type-body);
        font-size: 0.8em;
      }
      h2:hover .heading-anchor, h3:hover .heading-anchor,
      .heading-anchor:focus-visible { opacity: 1; }

      /* Back to top */
      .totop {
        position: fixed; right: 1.4rem; bottom: 1.4rem;
        min-width: 44px; min-height: 44px;
        display: inline-flex; align-items: center; justify-content: center;
        background: var(--btn-bg); color: var(--btn-text);
        border: none; border-radius: var(--radius-pill);
        font-size: 1.1rem; cursor: pointer;
        box-shadow: var(--shadow-md);
        z-index: 900;
      }
      .totop[hidden] { display: none; }

      /* ==== Footer ==== */
      .footer {
        border-top: 1px solid var(--rule);
        background: var(--bg-alt);
        margin-top: 5rem;
        padding: 3.5rem 0 2rem;
        font-size: 0.93rem;
      }
      .footer-brand {
        font-family: var(--type-display);
        font-size: 1.25rem; font-weight: 700;
        margin-bottom: 0.6rem;
      }
      .footer-tagline { color: var(--ink-mute); max-width: 34ch; }
      .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr repeat(3, 1fr);
        gap: 2.5rem;
        padding-bottom: 2.5rem;
      }
      @media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
      @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
      .footer-heading {
        font-size: 0.76rem; font-weight: 700;
        letter-spacing: 0.14em; text-transform: uppercase;
        color: var(--ink-mute);
        margin-bottom: 0.9rem;
      }
      .footer-links { list-style: none; }
      .footer-links a {
        display: inline-flex; align-items: center;
        min-height: 34px;
        color: var(--ink-soft); text-decoration: none;
      }
      .footer-links a:hover { color: var(--link); text-decoration: underline; }
      .footer-legal {
        border-top: 1px solid var(--rule);
        padding-top: 1.5rem;
        display: flex; align-items: center; justify-content: space-between;
        flex-wrap: wrap; gap: 1rem;
        color: var(--ink-mute); font-size: 0.85rem;
      }
      .footer-legal ul { list-style: none; display: flex; flex-wrap: wrap; gap: 1.25rem; }
      .footer-legal a { color: var(--ink-mute); }
      .footer-legal a:hover { color: var(--link); }

      /* Resources disclosure (WAI-ARIA APG disclosure-navigation pattern:
         button + aria-expanded, click/Enter/Space to open, Esc closes and
         returns focus, focus-out closes — deliberately NOT a hover menu). */
      /* Author display:grid beats the UA [hidden] rule — restate it. */

      /* Print: the executive brief (and any page) prints as a clean
         document — chrome removed, links written out. */
      @media print {
        .ap-nav, .footer, .breadcrumb, .totop, .progress, .skip-link,
        #themeToggle, .nav-cta { display: none !important; }
        body { background: #fff; color: #000; }
        .page-header { padding: 0 0 1rem; border-bottom: 2px solid #000; }
        .content-body { max-width: none; font-size: 11pt; }
        .content-body a[href^="http"]::after,
        .content-body a[href^="/"]::after {
          content: " (" attr(href) ")";
          font-size: 0.85em; color: #333;
        }
        @page { margin: 18mm; }
      }
      /* ==== Header (ported from sebastienrousseau.com): 3-column grid,
         disclosure submenus, sun/moon toggle, cmd-K search, globe locale
         menu, CTA pill, checkbox-burger mobile sheet. ==== */
      .ap-nav {
        position: sticky; top: 0; z-index: 1000;
        background: color-mix(in srgb, var(--bg-page) 92%, transparent);
        backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--rule);
      }
      .ap-nav-wrap {
        display: grid; grid-template-columns: auto 1fr auto;
        align-items: center; gap: 1rem; min-height: 64px;
      }
      .ap-toggle { position: absolute; opacity: 0; height: 0; width: 0; }
      .ap-brand {
        justify-self: start; display: inline-flex; align-items: center; gap: 0.55rem;
        font-family: var(--type-display); font-size: 1.2rem; font-weight: 700;
        color: var(--ink); text-decoration: none; min-height: 44px; white-space: nowrap;
      }
      .ap-brand img { width: 26px; height: 26px; }
      .ap-menu {
        justify-self: center; display: flex; align-items: center;
        list-style: none; margin: 0; padding: 0; gap: 0.35rem;
      }
      .ap-menu > li { position: relative; display: inline-flex; align-items: center; }
      .ap-menu a {
        display: inline-flex; align-items: center; min-height: 44px;
        padding: 0 0.55rem; color: var(--ink-soft); text-decoration: none;
        font-size: 0.9rem; font-weight: 500; white-space: nowrap;
        border-radius: var(--radius-sm);
      }
      .ap-menu a:hover { color: var(--ink); background: var(--bg-alt); }
      .ap-menu a[aria-current="page"] {
        color: var(--link); font-weight: 700; position: relative;
      }
      .ap-menu > li > a[aria-current="page"]::after {
        content: ""; position: absolute; left: 0.55rem; right: 0.55rem; bottom: 4px;
        height: 2px; background: var(--link); border-radius: 1px;
      }
      .ap-sub-toggle {
        display: inline-flex; align-items: center; justify-content: center;
        width: 44px; height: 44px; margin-inline-start: -6px;
        padding: 0; background: transparent; border: 0; border-radius: 50%;
        color: var(--ink-soft); cursor: pointer;
      }
      .ap-sub-toggle:hover { color: var(--ink); background: var(--bg-alt); }
      .ap-sub-toggle svg {
        width: 12px; height: 12px; stroke: currentColor; fill: none;
        stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
        transition: transform 0.18s ease;
      }
      .ap-sub-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
      .ap-sub {
        position: absolute; top: calc(100% + 8px); left: 50%;
        transform: translateX(-50%);
        min-width: 240px; margin: 0; padding: 0.6rem 0; list-style: none;
        background: var(--bg-card); border: 1px solid var(--rule);
        border-radius: var(--radius-md); box-shadow: var(--shadow-md);
        display: none; z-index: 1100;
      }
      .has-sub:hover > .ap-sub,
      .ap-sub-toggle[aria-expanded="true"] + .ap-sub { display: block; }
      html:not(.has-js) .has-sub:focus-within > .ap-sub { display: block; }
      .ap-sub li { display: block; }
      .ap-sub a { display: flex; padding: 0 1.1rem; font-size: 0.9rem; border-radius: 0; }
      .ap-nav-right {
        justify-self: end; display: inline-flex; align-items: center; gap: 0.35rem;
      }
      .theme-toggle, .ap-search-btn {
        display: inline-flex; align-items: center; justify-content: center;
        gap: 0.4rem; min-width: 44px; min-height: 44px; padding: 0 0.5rem;
        background: transparent; border: 1px solid transparent; border-radius: 999px;
        color: var(--ink); cursor: pointer; font-family: inherit;
      }
      .theme-toggle { width: 44px; padding: 0; }
      .theme-toggle:hover, .ap-search-btn:hover { background: var(--bg-alt); }
      .theme-toggle svg, .ap-search-btn svg {
        width: 16px; height: 16px; stroke: currentColor; fill: none;
        stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
      }
      .theme-toggle .icon-sun { display: none; }
      .theme-toggle .icon-moon { display: inline; }
      [data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
      [data-theme="dark"] .theme-toggle .icon-moon { display: none; }
      @media (prefers-color-scheme: dark) {
        html:not([data-theme="light"]) .theme-toggle .icon-sun { display: inline; }
        html:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
      }
      .ap-search-kbd {
        display: inline-flex; align-items: center; padding: 2px 6px;
        font-family: var(--type-mono); font-size: 0.72rem;
        color: var(--ink-mute); background: var(--bg-alt);
        border: 1px solid var(--rule); border-radius: 5px;
      }
      .ap-lang { position: relative; }
      .ap-lang-toggle {
        display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
        padding: 0 0.8rem; min-height: 44px; background: transparent;
        border: 1px solid var(--rule-strong); border-radius: 999px;
        color: var(--ink); cursor: pointer; font-family: inherit;
        font-size: 0.8rem; font-weight: 600;
      }
      .ap-lang-toggle:hover { background: var(--bg-alt); }
      .ap-lang-globe { font-size: 1rem; line-height: 1; }
      .ap-lang-menu {
        position: absolute; top: 100%; right: 0; margin-top: 0.4rem; padding: 0.5rem;
        background: var(--bg-card); border: 1px solid var(--rule);
        border-radius: var(--radius-md); box-shadow: var(--shadow-md);
        z-index: 1100; max-height: min(70vh, 480px); overflow: auto;
      }
      .ap-lang-menu[hidden] { display: none; }
      .ap-lang-menu-grid { display: grid; grid-template-columns: repeat(4, minmax(120px, 1fr)); }
      .ap-lang-item {
        display: flex; align-items: center; gap: 0.4rem;
        padding: 0.45rem 0.6rem; min-height: 40px; border-radius: 6px;
        font-size: 0.82rem; color: var(--ink-soft); text-decoration: none; white-space: nowrap;
      }
      .ap-lang-item:hover { background: var(--bg-alt); color: var(--ink); }
      .ap-lang-item[aria-current="true"] { color: var(--link); font-weight: 700; }
      .ap-cta-mini {
        display: inline-flex; align-items: center; gap: 0.2rem;
        min-height: 44px; padding: 0 1.1rem;
        background: var(--btn-bg); color: var(--btn-text);
        border-radius: 999px; font-size: 0.85rem; font-weight: 600;
        text-decoration: none; white-space: nowrap;
      }
      .ap-cta-mini:hover { opacity: 0.85; }
      .ap-burger {
        display: none; align-items: center; justify-content: center;
        width: 44px; height: 44px; cursor: pointer;
        font-size: 1.2rem; color: var(--ink); border-radius: var(--radius-sm);
        border: 1px solid var(--rule-strong); user-select: none;
      }
      .ap-toggle:focus-visible ~ .ap-nav-wrap .ap-burger {
        outline: 3px solid var(--focus-ring); outline-offset: 2px;
      }
      .ap-toggle:checked ~ .ap-nav-wrap .ap-burger { color: var(--link); border-color: var(--link); }

      @media (max-width: 1180px) {
        .ap-nav-wrap { grid-template-columns: auto auto; }
        .ap-brand { grid-row: 1; grid-column: 1; }
        .ap-nav-right { grid-row: 1; grid-column: 2; }
        .ap-burger { display: inline-flex; }
        .ap-nav nav { display: none; grid-row: 2; grid-column: 1 / -1; }
        .ap-toggle:checked ~ .ap-nav-wrap nav { display: block; }
        .ap-menu {
          display: block; width: 100%; justify-self: stretch;
          padding: 0.25rem 0 1rem;
          max-height: calc(100dvh - 76px); overflow: auto;
        }
        .ap-menu > li { display: block; position: static; }
        .ap-menu > li + li { border-top: 1px solid var(--rule); }
        .ap-menu > li > a {
          display: flex; justify-content: center; min-height: 48px;
          font-size: 1rem; font-weight: 600;
        }
        .ap-sub-toggle { display: none; }
        .ap-sub {
          position: static; transform: none; display: block !important;
          min-width: 0; border: 0; border-radius: 0; box-shadow: none;
          background: transparent; padding: 0 0 0.5rem;
        }
        .ap-sub a {
          justify-content: center; min-height: 44px;
          padding: 0; color: var(--ink-mute);
        }
        .ap-menu > li > a[aria-current="page"]::after { display: none; }
      }
      @media (max-width: 720px) { .ap-cta-mini { display: none; } .ap-search-kbd { display: none; } }
      @media (max-width: 480px) { .ap-lang { display: none; } .ap-nav-wrap { gap: 0.5rem; } }

      /* ssg's injected floating search trigger duplicates the in-nav
         search button; hide the trigger, keep the overlay it opens. */
      #ssg-search-btn { display: none !important; }
      /* AAA overrides for ssg's injected search widget: its own stylesheet
         ships 6.3-6.9:1 labels; force token colours (>= 7:1 both themes). */
      #ssg-search-btn, #ssg-search-btn span { color: var(--ink-soft) !important; }
      #ssg-search-btn kbd {
        color: var(--ink) !important;
        background: var(--bg-page) !important;
        border-color: var(--rule-strong) !important;
      }