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

    :root {
      /* Light theme — paperclip.ing "materials" palette */
      --white:      #ffffff;            /* bond / surface */
      --linen:      #ffffff;            /* page background (matches paperclip.ing) */
      --parchment:  #f0ece7;            /* raised surface */
      --stone:      #e0dcd6;            /* rule / border */
      --stone-dark: #c8c3bc;            /* border hover */
      --ink:        #0a0a0a;            /* primary text */
      --graphite:   #52585d;            /* secondary text */
      --ash:        #9a958a;            /* muted text */
      --void:       #141413;            /* charcoal */
      --green:      #22c55e;            /* signal / success */
      --green-deep: #188a3c;            /* success deep */
      --mint:       #dcfce7;            /* success soft tint */
      --amber:      #f59e0b;            /* warning */
      --amber-deep: #b45309;            /* warning deep */
      --blue:       #2563eb;            /* info */
      --blue-deep:  #1d4ed8;            /* info deep */
      --red:        #dc2626;            /* error */
      --red-deep:   #991b1b;            /* error deep */

      --sidebar-w:   272px;
      --content-max: 920px;   /* fills the 1280 layout (1232 inner − 272 sidebar − 40 gap) so the doc body lines up with header/footer */
      --outer-px:    24px;
      --layout-max:  1280px;

      --header-h:    60px;
      --topbar-h:    var(--header-h);

      /* Inter Tight for display, Inter for body, JetBrains Mono for code */
      --font-serif: 'Inter Tight', -apple-system, BlinkMacSystemFont, sans-serif;
      --font-body:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      --font-mono:  'JetBrains Mono', 'Fira Code', monospace;

      /* Brand radius scale — "each radius signals meaning" */
      --radius-xs:  4px;                 /* status pills, code chips, table cells */
      --radius-sm:  10px;                /* inputs, small cards, buttons, menus */
      --radius:     16px;                /* default card / panel / feature block (md) */
      --radius-lg:  24px;                /* large surfaces */
      --radius-pill: 9999px;            /* PRIMARY CTA ONLY */
      --transition: 0.2s ease;
    }

    /* ─── Dark theme — warm charcoal + manila cream ──────────── */
    [data-theme="dark"] {
      --white:      #1f1d1a;            /* surface */
      --linen:      #141413;            /* page background — charcoal */
      --parchment:  #2a2724;            /* raised surface */
      --stone:      #2f2c28;            /* rule / border */
      --stone-dark: #3a3836;            /* border hover */
      --ink:        #f3e6c4;            /* manila — primary text */
      --graphite:   #9a958a;            /* secondary text (brand --text-2 dark) */
      --ash:        #8a8579;            /* muted text — raised from brand #6E6960 for WCAG AA (~5:1) since --ash is reused for normal-size text */
      --void:       #0d0d0d;
      --mint:       rgba(34,197,94,0.12);
    }
    [data-theme="dark"] #article pre { background: #0d0d0d; color: #f3e6c4; }
    [data-theme="dark"] #header { background: rgba(20,20,19,0.92); backdrop-filter: blur(8px); }

    html {
      font-size: 16px;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    body {
      background: var(--linen); color: var(--ink);
      font-family: var(--font-body); line-height: 1.65;
      font-feature-settings: 'ss01' 1, 'cv11' 1;
      min-height: 100vh;
      transition: background 0.25s, color 0.25s;
    }
    body, #header, #sidebar, #article, .card, .page-nav-btn, .icon-btn, #search-input {
      transition: background 0.25s, color 0.25s, border-color 0.25s;
    }

    /* ─── Navbar (mirrors paperclip.ing) ─────────────────────── */
    .navbar {
      position: sticky;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: var(--linen);
      border-bottom: 1px solid var(--stone);
      transition: background 0.3s ease-out, border-color 0.3s ease-out;
    }
    .navbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 60px;
      max-width: var(--layout-max);
      margin: 0 auto;
      padding: 0 var(--outer-px);
      gap: 1.5rem;
    }
    .navbar-left, .navbar-right {
      display: flex;
      align-items: center;
      gap: 1.5rem;
      flex: 1;
    }
    .navbar-left { justify-content: flex-start; }
    .navbar-right { justify-content: flex-end; }
    .navbar-logo {
      display: flex;
      align-items: center;
      gap: 0.35rem;
      font-family: var(--font-serif);
      font-weight: 600;
      font-size: 0.95rem;
      white-space: nowrap;
    }
    .navbar-logo-link {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      color: var(--ink);
      text-decoration: none;
      transition: color 0.15s ease;
    }
    .navbar-logo-link:hover { color: var(--ink); }
    .navbar-logo-sub { color: var(--graphite); font-weight: 600; }
    [data-theme="dark"] .navbar-logo-sub { color: var(--ash); }
    .navbar-logo-sub:hover { color: var(--ink); }
    [data-theme="dark"] .navbar-logo-sub:hover { color: var(--ink); }
    .navbar-link {
      font-size: 0.85rem;
      font-weight: 450;
      color: var(--graphite);
      text-decoration: none;
      transition: color 0.15s ease;
    }
    [data-theme="dark"] .navbar-link { color: var(--ash); }
    .navbar-link:hover { color: var(--ink); }
    .navbar-link--icon {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    /* GitHub icon shown next to Star on mobile only (desktop uses the left nav link) */
    .navbar-github-mobile { display: none; }
    .navbar-github-mobile svg { width: 18px; height: 18px; }
    /* Search trigger duplicated on the left for mobile; hidden on desktop.
       Scoped to .navbar-left so it beats the base .navbar-search-btn display. */
    .navbar-left .navbar-search-mobile { display: none; }
    .navbar-cta {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      font-size: 0.8rem;
      font-weight: 500;
      color: var(--linen);
      background: var(--ink);
      padding: 0.45rem 1rem;
      border-radius: 9999px;
      border: 1px solid var(--ink);
      text-decoration: none;
      transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
    }
    .navbar-cta:hover { background: var(--white); color: var(--ink); border-color: var(--ink); }
    [data-theme="dark"] .navbar-cta { color: #141413; background: #f3e6c4; border-color: #f3e6c4; }
    [data-theme="dark"] .navbar-cta:hover { background: transparent; color: #f3e6c4; border-color: #f3e6c4; }
    .navbar-cta-count { font-size: 0.75rem; font-weight: 600; opacity: 0.7; margin-left: 0.1rem; }

    /* ─── Navbar search trigger ──────────────────────────────── */
    .navbar-search-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      height: 32px;
      padding: 0 10px 0 10px;
      background: transparent;
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      color: var(--graphite);
      font-family: var(--font-body);
      font-size: 0.85rem;
      font-weight: 450;
      cursor: pointer;
      transition: background var(--transition), border-color var(--transition), color var(--transition);
    }
    [data-theme="dark"] .navbar-search-btn { color: var(--ash); }
    .navbar-search-btn:hover { border-color: var(--stone-dark); color: var(--ink); background: var(--white); }
    .navbar-search-btn svg { width: 14px; height: 14px; color: var(--ash); flex-shrink: 0; }
    .navbar-search-btn:hover svg { color: var(--ink); }
    .navbar-search-label { color: inherit; }
    .navbar-search-kbd {
      font-family: var(--font-mono);
      font-size: 10.5px;
      color: var(--ash);
      background: var(--linen);
      border: 1px solid var(--stone);
      border-radius: var(--radius-xs);
      padding: 1px 5px;
      pointer-events: none;
    }

    /* ─── Breadcrumb (above article) ─────────────────────────── */
    #breadcrumb {
      font-size: 13px;
      color: var(--ash);
      display: flex;
      align-items: center;
      gap: 6px;
      overflow: hidden;
      white-space: nowrap;
      margin-bottom: 18px;
    }
    #breadcrumb:empty { display: none; }
    #breadcrumb .sep { color: var(--stone-dark); }
    #breadcrumb .crumb-current { color: var(--ink); font-weight: 500; }

    /* ─── Search modal (⌘K) ──────────────────────────────────── */
    #search-modal {
      position: fixed;
      inset: 0;
      z-index: 300;
      display: flex;
      align-items: flex-start;
      justify-content: center;
      padding: 14vh 16px 16px;
    }
    #search-modal[hidden] { display: none; }
    #search-modal-backdrop {
      position: absolute;
      inset: 0;
      background: rgba(10, 10, 10, 0.45);
      backdrop-filter: blur(4px);
      animation: search-fade 0.15s ease-out;
    }
    [data-theme="dark"] #search-modal-backdrop { background: rgba(0, 0, 0, 0.65); }
    #search-modal-panel {
      position: relative;
      width: 100%;
      max-width: 600px;
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius-lg);
      box-shadow: 0 20px 60px rgba(0,0,0,0.16), 0 4px 12px rgba(0,0,0,0.08);
      overflow: hidden;
      animation: search-pop 0.16s var(--transition) both;
    }
    [data-theme="dark"] #search-modal-panel { box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 4px 12px rgba(0,0,0,0.4); }
    @keyframes search-fade { from { opacity: 0; } to { opacity: 1; } }
    @keyframes search-pop  { from { opacity: 0; transform: translateY(-8px) scale(0.98); } to { opacity: 1; transform: none; } }

    #search-wrap { position: relative; width: 100%; }
    #search-input {
      width: 100%; height: 56px;
      padding: 0 60px 0 48px;
      border: none;
      border-bottom: 1px solid var(--stone);
      border-radius: 0;
      background: transparent;
      font-family: var(--font-body); font-size: 15px; color: var(--ink);
      outline: none;
      -webkit-appearance: none;
    }
    #search-input::placeholder { color: var(--ash); }
    #search-input::-webkit-search-decoration,
    #search-input::-webkit-search-cancel-button { display: none; }
    #search-icon { position: absolute; left: 20px; top: 28px; transform: translateY(-50%); width: 16px; height: 16px; color: var(--ash); pointer-events: none; }
    #search-kbd {
      position: absolute; right: 16px; top: 28px; transform: translateY(-50%);
      font-size: 11px; color: var(--ash);
      background: var(--linen); border: 1px solid var(--stone);
      border-radius: var(--radius-xs); padding: 1px 6px;
      font-family: var(--font-mono);
      pointer-events: none;
    }

    /* Search results list (inside modal) */
    #search-results {
      width: 100%;
      background: transparent;
      display: none;
      max-height: min(420px, 50vh);
      overflow-y: auto;
      scrollbar-width: thin;
    }
    #search-results.is-open { display: block; }
    .search-result {
      display: block;
      padding: 9px 14px;
      cursor: pointer;
      border-bottom: 1px solid var(--linen);
      transition: background var(--transition);
    }
    .search-result:last-child { border-bottom: none; }
    .search-result:hover,
    .search-result.focused { background: var(--linen); }
    .search-result-title {
      font-size: 13px; font-weight: 500; color: var(--ink); line-height: 1.4;
    }
    .search-result-meta {
      font-size: 11.5px; color: var(--ash); margin-top: 2px; line-height: 1.4;
      white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    }
    .search-result-title mark,
    .search-result-meta mark {
      background: var(--mint); color: var(--ink); border-radius: 2px; padding: 0 1px;
      font-style: normal;
    }
    .search-empty { padding: 18px 14px; font-size: 13px; color: var(--ash); text-align: center; }

    .icon-btn {
      width: 34px; height: 34px;
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      background: var(--white);
      color: var(--graphite);
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      transition: border-color var(--transition), color var(--transition);
      flex-shrink: 0;
      text-decoration: none;
    }
    .icon-btn:hover { border-color: var(--stone-dark); color: var(--ink); }
    .icon-btn svg { width: 16px; height: 16px; }

    /* ─── Floating theme toggle (bottom-right) ───────────────── */
    .theme-toggle {
      position: fixed;
      bottom: 20px;
      right: 20px;
      z-index: 200;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 9999px;
      background: var(--white);
      border: 1px solid var(--stone);
      color: var(--graphite);
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
      transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.15s ease;
    }
    .theme-toggle:hover { background: var(--parchment); color: var(--ink); transform: translateY(-1px); }
    [data-theme="dark"] .theme-toggle { box-shadow: 0 4px 12px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3); }
    .theme-toggle-icon { display: none; align-items: center; justify-content: center; }
    .theme-toggle-moon { display: flex; }
    [data-theme="dark"] .theme-toggle-sun { display: flex; }
    [data-theme="dark"] .theme-toggle-moon { display: none; }

    /* ─── Landing ───────────────────────────────────────────── */
    #landing {
      max-width: var(--layout-max);
      margin: 0 auto;
      padding: 80px var(--outer-px) 120px;
      display: none;
    }
    #landing.is-active { display: block; }

    #landing-hero { max-width: 620px; margin-bottom: 64px; }
    #landing-eyebrow {
      font-size: 11px; font-weight: 600; letter-spacing: 0.12em;
      text-transform: uppercase; color: var(--ash); margin-bottom: 16px;
    }
    #landing-title {
      font-family: var(--font-serif);
      font-size: clamp(40px, 6vw, 64px);
      font-weight: 600; line-height: 1.05; letter-spacing: -0.04em;
      color: var(--ink); margin-bottom: 20px;
    }
    #landing-title em { font-style: italic; color: inherit; }
    #landing-desc { font-size: 17px; line-height: 1.6; color: var(--graphite); max-width: 560px; }

    .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

    .card {
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius);
      padding: 24px;
      text-decoration: none;
      color: inherit;
      display: flex; flex-direction: column; gap: 10px;
      transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
      position: relative; overflow: hidden;
      cursor: pointer;
    }
    .card:hover { border-color: var(--stone-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,26,26,0.04); }

    .card-icon {
      width: 36px; height: 36px; border-radius: var(--radius-sm);
      background: var(--parchment); border: 1px solid var(--stone);
      display: flex; align-items: center; justify-content: center;
      color: var(--graphite); margin-bottom: 4px;
    }
    .card-icon svg { width: 18px; height: 18px; }

    .card-title { font-family: var(--font-serif); font-size: 22px; font-weight: 600; letter-spacing: -0.02em; color: var(--ink); line-height: 1.2; }
    .card-desc  { font-size: 13.5px; color: var(--graphite); line-height: 1.55; }
    .card-meta  { font-size: 11.5px; color: var(--ash); margin-top: 10px; display: flex; align-items: center; gap: 6px; }
    .card-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--stone-dark); }

    /* ─── Footer (mirrors paperclip.ing — always dark) ───────── */
    .footer {
      /* Pin to paperclip.ing dark palette regardless of page theme */
      --bg: #141413;
      --surface: #1F1D1A;
      --ink-t: #F3E6C4;
      --mono: #9A958A;
      --rule: #2F2C28;
      background: var(--bg);
      color: var(--ink-t);
      border-top: 1px solid var(--rule);
      margin-top: 80px;
    }
    .footer-container {
      max-width: var(--layout-max);
      margin: 0 auto;
      padding: 0 var(--outer-px);
    }
    .footer-wordmark-row {
      padding-top: clamp(3rem, 6vw, 5rem);
      padding-bottom: clamp(2rem, 4vw, 3.5rem);
    }
    .footer-wordmark {
      font-family: var(--font-serif);
      font-size: 28px;
      font-weight: 600;
      letter-spacing: -0.045em;
      line-height: 1;
      color: var(--ink-t);
      display: block;
    }
    .footer-columns {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: clamp(2rem, calc(1.5rem + 1.5vw), 3rem);
      padding-bottom: clamp(3rem, 6vw, 5rem);
    }
    .footer-col-heading {
      font-family: var(--font-body);
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--ink-t);
      letter-spacing: 0.01em;
      margin-bottom: 0.75rem;
    }
    .footer-col a {
      display: block;
      font-size: 0.875rem;
      color: var(--mono);
      text-decoration: none;
      padding: 0.2rem 0;
      transition: color 0.15s ease;
    }
    .footer-col a:hover { color: var(--ink-t); }
    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
      padding-top: 1.5rem;
      padding-bottom: 1.5rem;
      border-top: 1px solid var(--rule);
    }
    .footer-copy {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--mono);
    }
    .footer-bottom-links {
      display: flex;
      gap: 1.5rem;
    }
    .footer-bottom-links a {
      font-size: 0.8rem;
      color: var(--mono);
      text-decoration: none;
      transition: color 0.15s ease;
    }
    .footer-bottom-links a:hover { color: var(--ink-t); }
    @media (max-width: 768px) {
      .footer-columns { grid-template-columns: repeat(2, 1fr); gap: clamp(2rem, 4vw, 3rem) 1.5rem; }
    }
    @media (max-width: 480px) {
      .footer-bottom { flex-direction: column; align-items: flex-start; }
    }

    /* ─── Article view ─────────────────────────────────────── */
    #article-view { display: none; }
    #article-view.is-active { display: block; }

    #body {
      max-width: var(--layout-max);
      margin: 0 auto;
      padding: 0 var(--outer-px);
      display: flex;
      align-items: flex-start;
      gap: 40px;
    }

    /* Sidebar */
    #sidebar {
      width: var(--sidebar-w);
      min-width: var(--sidebar-w);
      flex-shrink: 0;
      position: sticky;
      top: var(--topbar-h);
      max-height: calc(100vh - var(--topbar-h));
      overflow-y: auto;
      padding: 32px 0 40px;
      scrollbar-width: thin;
    }

    .sb-back {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: 12px; color: var(--ash);
      text-decoration: none;
      padding: 4px 8px; margin-left: -8px; margin-bottom: 20px;
      border-radius: 6px;
      transition: color var(--transition), background var(--transition);
      cursor: pointer;
    }
    .sb-back:hover { color: var(--ink); background: var(--parchment); }
    .sb-back svg { width: 12px; height: 12px; }
    /* Desktop sidebar has no horizontal padding + overflow-y forces overflow-x:auto,
       which clips a negative margin. Align flush instead so the chevron isn't cut off. */
    #sidebar .sb-back { margin-left: 0; padding-left: 10px; }

    .sb-section { margin-bottom: 4px; }

    .sb-group-label {
      display: flex; align-items: center; gap: 10px;
      padding: 18px 10px 6px;
      font-size: 10.5px; font-weight: 600;
      color: var(--ash);
      text-transform: uppercase;
      letter-spacing: 0.08em;
    }
    .sb-group-label:first-child { padding-top: 6px; }

    .sb-section-btn {
      width: 100%;
      display: flex; align-items: center; gap: 8px;
      padding: 7px 10px;
      border: none; background: none; cursor: pointer;
      border-radius: 7px;
      font-family: var(--font-body);
      font-size: 12.5px; font-weight: 600;
      color: var(--ink); letter-spacing: 0.01em;
      text-align: left;
      transition: background var(--transition);
    }
    .sb-section-btn:hover { background: var(--parchment); }
    .sb-section-btn .chev {
      width: 11px; height: 11px; color: var(--ash);
      transition: transform var(--transition);
      flex-shrink: 0;
    }
    .sb-section[data-open="true"] .sb-section-btn .chev { transform: rotate(90deg); }

    .sb-section-icon {
      width: 18px; height: 18px; border-radius: 5px;
      background: var(--parchment); border: 1px solid var(--stone);
      display: flex; align-items: center; justify-content: center;
      color: var(--graphite); flex-shrink: 0;
    }
    .sb-section-icon svg { width: 11px; height: 11px; }

    .sb-section-title { flex: 1; }
    .sb-section-count { font-size: 10.5px; color: var(--ash); font-weight: 500; }

    .sb-pages {
      display: none; padding: 2px 0 6px 26px; margin-left: 3px;
      border-left: 1px solid var(--stone);
    }
    .sb-section[data-open="true"] .sb-pages { display: block; }

    .sb-link {
      display: block; padding: 5px 10px;
      margin-bottom: 2px;
      font-size: 12.5px; color: var(--graphite);
      text-decoration: none; border-radius: 6px;
      line-height: 1.45; cursor: pointer;
      transition: background var(--transition), color var(--transition);
    }
    .sb-link:hover,
    .sb-link.active {
      color: var(--ink); font-weight: 500;
      background: var(--parchment);
    }

    /* Content */
    #content {
      flex: 1; min-width: 0;
      max-width: var(--content-max);
      padding: 48px 0 96px;
    }

    /* Loading / error */
    #loading, #error-state {
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      gap: 12px; padding: 80px 0;
      color: var(--ash); font-size: 14px;
    }
    .spinner {
      width: 24px; height: 24px;
      border: 2px solid var(--stone); border-top-color: var(--green);
      border-radius: 50%; animation: spin 0.7s linear infinite;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    #article { font-size: 15.5px; line-height: 1.75; color: var(--graphite); overflow-wrap: break-word; }
    #article h1 {
      font-family: var(--font-serif);
      font-size: clamp(28px, 4vw, 38px);
      font-weight: 600; letter-spacing: -0.03em;
      color: var(--ink);
      margin-bottom: 20px; line-height: 1.1;
    }
    .meta-row {
      display: flex; align-items: center; gap: 10px;
      margin-bottom: 24px; padding: 12px 0 12px;
      border-bottom: 1px solid var(--stone);
      font-size: 12px; color: var(--ash);
      position: sticky;
      top: var(--topbar-h);
      background: var(--linen);
      z-index: 50;
    }
    .meta-row::before {
      content: ''; position: absolute;
      left: 0; right: 0; top: -1px; height: 1px;
      background: var(--linen);
    }
    .meta-row .chip {
      padding: 2px 8px; border-radius: var(--radius-xs);
      background: var(--parchment); border: 1px solid var(--stone);
      font-size: 11px; color: var(--graphite);
    }
    .meta-row .spacer { flex: 1; }

    .page-actions { position: relative; display: inline-flex; align-items: stretch; }
    .page-actions .pa-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 5px 10px;
      background: var(--white);
      border: 1px solid var(--stone);
      font-family: var(--font-body);
      font-size: 11.5px; font-weight: 500;
      color: var(--graphite); cursor: pointer;
      transition: border-color var(--transition), color var(--transition), background var(--transition);
    }
    .page-actions .pa-btn:hover { border-color: var(--stone-dark); color: var(--ink); }
    .page-actions .pa-copy { border-radius: var(--radius-sm) 0 0 var(--radius-sm); padding-left: 12px; }
    .page-actions .pa-caret {
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      border-left: none;
      padding: 5px 8px;
    }
    .page-actions .pa-caret svg { width: 12px; height: 12px; color: var(--ash); transition: transform var(--transition); }
    .page-actions .pa-caret[aria-expanded="true"] { color: var(--ink); background: var(--parchment); border-color: var(--stone-dark); }
    .page-actions .pa-caret[aria-expanded="true"] svg { transform: rotate(180deg); color: var(--ink); }
    .page-actions .pa-copy svg { width: 13px; height: 13px; color: var(--ash); }
    .page-actions .pa-copy.is-copied { color: var(--green); border-color: var(--green); }
    .page-actions .pa-copy.is-copied svg { color: var(--green); }

    .pa-menu {
      position: absolute; top: calc(100% + 8px); right: 0;
      min-width: 220px;
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      box-shadow: 0 12px 32px rgba(12,12,12,0.12), 0 2px 6px rgba(12,12,12,0.06);
      padding: 6px;
      opacity: 0; transform: translateY(-4px) scale(0.98);
      pointer-events: none;
      transform-origin: top right;
      transition: opacity 0.16s ease, transform 0.16s ease;
      z-index: 60;
    }
    [data-theme="dark"] .pa-menu { box-shadow: 0 12px 32px rgba(0,0,0,0.6), 0 2px 6px rgba(0,0,0,0.4); }
    .pa-menu.is-open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
    .pa-menu button {
      display: flex; align-items: center; gap: 10px;
      width: 100%;
      padding: 7px 10px;
      background: none; border: none;
      font-family: var(--font-body);
      font-size: 13px; color: var(--graphite);
      text-align: left; cursor: pointer;
      border-radius: 5px;
      transition: color var(--transition), background var(--transition);
    }
    .pa-menu button:hover { color: var(--ink); background: var(--linen); }
    .pa-menu button svg { width: 14px; height: 14px; color: var(--ash); flex-shrink: 0; }
    .pa-menu button:hover svg { color: var(--ink); }

    .page-feedback {
      margin-top: 64px;
      padding: 20px 22px;
      background: var(--parchment);
      border: 1px solid var(--stone);
      border-radius: var(--radius);
      display: flex; flex-wrap: wrap; align-items: center;
      gap: 14px 20px;
    }
    .page-feedback .pf-label {
      font-family: var(--font-serif);
      font-size: 17px; font-weight: 600;
      color: var(--ink);
      letter-spacing: -0.02em;
      flex: 1 1 auto;
    }
    .page-feedback .pf-actions { display: flex; flex-wrap: wrap; gap: 8px; }
    .page-feedback a {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 7px 12px;
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      font-size: 13px; font-weight: 500;
      color: var(--graphite);
      text-decoration: none;
      transition: border-color 0.15s, color 0.15s, background 0.15s, transform 0.15s;
    }
    .page-feedback a:hover {
      color: var(--ink);
      border-color: var(--graphite);
      background: var(--linen);
      transform: translateY(-1px);
    }
    .page-feedback a svg {
      width: 14px; height: 14px;
      stroke: currentColor; stroke-width: 1.75;
      fill: none; stroke-linecap: round; stroke-linejoin: round;
    }
    @media (max-width: 640px) {
      .page-feedback { padding: 16px; }
      .page-feedback .pf-label { flex-basis: 100%; }
    }

    .toc-wrap { position: relative; }

    .toc-toggle {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 5px 10px 5px 12px;
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      font-family: var(--font-body);
      font-size: 11.5px; font-weight: 500;
      color: var(--graphite); cursor: pointer;
      transition: border-color var(--transition), color var(--transition), background var(--transition);
    }
    .toc-toggle:hover { border-color: var(--stone-dark); color: var(--ink); }
    .toc-toggle[aria-expanded="true"] {
      color: var(--ink); background: var(--parchment); border-color: var(--stone-dark);
    }
    .toc-toggle > svg { width: 12px; height: 12px; color: var(--ash); transition: transform var(--transition); }
    .toc-toggle .toc-icon { width: 13px; height: 13px; color: var(--ash); transition: none; }
    .toc-toggle[aria-expanded="true"] .toc-icon { color: var(--ink); transform: none; }
    .toc-toggle > svg:last-of-type { /* chevron */ }
    .toc-toggle[aria-expanded="true"] > svg:last-of-type { transform: rotate(180deg); color: var(--ink); }
    .toc-toggle .count {
      font-size: 10px; color: var(--ash);
      background: var(--parchment); border-radius: var(--radius-xs);
      padding: 1px 6px; font-variant-numeric: tabular-nums;
    }
    .toc-toggle[aria-expanded="true"] .count { background: var(--white); }

    .toc-panel {
      position: absolute; top: calc(100% + 8px); right: 0;
      width: 280px; max-width: calc(100vw - 48px);
      max-height: min(60vh, 420px); overflow-y: auto;
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      box-shadow: 0 12px 32px rgba(12,12,12,0.12), 0 2px 6px rgba(12,12,12,0.06);
      padding: 8px;
      opacity: 0; transform: translateY(-4px) scale(0.98);
      pointer-events: none;
      transform-origin: top right;
      transition: opacity 0.16s ease, transform 0.16s ease;
      z-index: 60;
    }
    [data-theme="dark"] .toc-panel { box-shadow: 0 12px 32px rgba(0,0,0,0.6), 0 2px 6px rgba(0,0,0,0.4); }
    .toc-panel.is-open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
    .toc-panel-label { display: none; }
    .toc-panel .toc-link {
      display: block;
      padding: 6px 10px;
      margin-bottom: 2px;
      font-size: 13px;
      line-height: 1.45;
      color: var(--graphite);
      text-decoration: none;
      cursor: pointer;
      border-radius: 5px;
      transition: color var(--transition), background var(--transition);
    }
    .toc-panel .toc-link.level-3 {
      padding-left: 22px;
      font-size: 12.5px;
      color: var(--ash);
    }
    .toc-panel .toc-link:hover,
    .toc-panel .toc-link.active {
      color: var(--ink);
      background: var(--linen);
      font-weight: 500;
    }

    #article h2 {
      font-family: var(--font-serif);
      font-size: 24px; font-weight: 600; letter-spacing: -0.02em;
      color: var(--ink);
      margin-top: 40px; margin-bottom: 14px;
      line-height: 1.25;
      padding-bottom: 8px;
      border-bottom: 1px solid var(--stone);
    }
    #article h3 { font-size: 15.5px; font-weight: 600; color: var(--ink); margin-top: 28px; margin-bottom: 8px; }
    #article h4 {
      font-size: 11px; font-weight: 600; color: var(--ash);
      text-transform: uppercase; letter-spacing: 0.08em;
      margin-top: 20px; margin-bottom: 6px;
    }
    #article h1, #article h2, #article h3, #article h4, #article h5, #article h6 { position: relative; scroll-margin-top: 128px; }

    #article .heading-anchor {
      display: inline-flex; align-items: center; justify-content: center;
      width: 22px; height: 22px; margin-left: 8px;
      border-bottom: none; color: var(--ash);
      opacity: 0; vertical-align: middle;
      border-radius: 6px; cursor: pointer;
      transition: opacity var(--transition), color var(--transition), background var(--transition), transform var(--transition);
    }
    #article .heading-anchor svg { width: 14px; height: 14px; }
    #article h1:hover .heading-anchor,
    #article h2:hover .heading-anchor,
    #article h3:hover .heading-anchor,
    #article h4:hover .heading-anchor,
    #article h5:hover .heading-anchor,
    #article h6:hover .heading-anchor,
    #article .heading-anchor:focus-visible { opacity: 1; }
    #article .heading-anchor:hover { color: var(--ink); background: var(--parchment); transform: translateY(-1px); }
    #article .heading-anchor.is-copied { color: var(--green); opacity: 1; background: var(--mint); }
    @media (hover: none) { #article .heading-anchor { opacity: 0.5; } }

    /* Code block with copy button */
    .code-wrap { position: relative; margin-bottom: 20px; }
    .code-wrap pre { margin-bottom: 0; }
    .code-copy {
      position: absolute; top: 8px; right: 8px;
      width: 30px; height: 30px;
      display: inline-flex; align-items: center; justify-content: center;
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.06);
      color: #d4d4d4;
      border-radius: 7px; cursor: pointer;
      opacity: 0;
      transition: opacity var(--transition), background var(--transition), color var(--transition);
    }
    .code-copy svg { width: 14px; height: 14px; }
    .code-wrap:hover .code-copy,
    .code-copy:focus-visible { opacity: 1; }
    .code-copy:hover { background: rgba(255,255,255,0.12); color: #fff; }
    .code-copy.is-copied { opacity: 1; color: var(--green); border-color: rgba(34,197,94,0.4); background: rgba(34,197,94,0.12); }
    @media (hover: none) { .code-copy { opacity: 0.75; } }

    #article p { margin-bottom: 16px; }
    #article a {
      color: var(--ink); text-decoration: none;
      transition: color var(--transition);
      overflow-wrap: anywhere;
    }
    #article a:hover { color: var(--graphite); }
    #article strong { color: var(--ink); font-weight: 600; }
    #article em { font-style: italic; }
    #article ul, #article ol { padding-left: 22px; margin-bottom: 16px; }
    #article li { margin-bottom: 6px; }
    #article li > p { margin-bottom: 8px; }
    #article ol > li { margin-bottom: 20px; }
    #article hr { border: none; border-top: 1px solid transparent; margin: 36px 0; }

    #article code {
      font-family: var(--font-mono); font-size: 0.87rem;
      font-variant-numeric: tabular-nums;
      background: var(--parchment); border: 1px solid var(--stone);
      border-radius: var(--radius-xs); padding: 1px 6px; color: var(--ink);
      /* Long unbreakable tokens (paths, keys, identifiers) must wrap so they
         don't force the whole page wider than the viewport on mobile. */
      overflow-wrap: anywhere; word-break: break-word;
    }
    #article pre {
      background: var(--void); color: #d4d4d4;
      border-radius: var(--radius-sm); padding: 18px 20px;
      overflow-x: auto; margin-bottom: 20px;
      font-family: var(--font-mono); font-size: 0.87rem; line-height: 1.6;
      font-variant-numeric: tabular-nums;
    }
    #article pre code { background: none; border: none; padding: 0; color: inherit; font-size: inherit;
      /* Block code keeps its own horizontal scroll (pre is overflow-x:auto); don't force-wrap it. */
      overflow-wrap: normal; word-break: normal; }

    /* Tables */
    .table-wrap {
      margin-bottom: 20px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      background:
        linear-gradient(to right, var(--white) 30%, rgba(255,255,255,0)),
        linear-gradient(to right, rgba(255,255,255,0), var(--white) 70%) 100% 0,
        radial-gradient(farthest-side at 0 50%, rgba(26,26,26,0.12), rgba(255,255,255,0)),
        radial-gradient(farthest-side at 100% 50%, rgba(26,26,26,0.12), rgba(255,255,255,0)) 100% 0;
      background-repeat: no-repeat;
      background-size: 40px 100%, 40px 100%, 14px 100%, 14px 100%;
      background-attachment: local, local, scroll, scroll;
    }
    [data-theme="dark"] .table-wrap {
      background:
        linear-gradient(to right, var(--white) 30%, rgba(18,18,22,0)),
        linear-gradient(to right, rgba(18,18,22,0), var(--white) 70%) 100% 0,
        radial-gradient(farthest-side at 0 50%, rgba(0,0,0,0.4), rgba(0,0,0,0)),
        radial-gradient(farthest-side at 100% 50%, rgba(0,0,0,0.4), rgba(0,0,0,0)) 100% 0;
      background-repeat: no-repeat;
      background-size: 40px 100%, 40px 100%, 14px 100%, 14px 100%;
      background-attachment: local, local, scroll, scroll;
    }
    #article table {
      width: 100%; border-collapse: collapse;
      margin-bottom: 0; font-size: 14px;
      min-width: 520px;
    }
    .table-wrap > table { border-radius: 0; border: none; }
    #article th {
      background: var(--parchment);
      border-bottom: 1px solid var(--stone);
      border-right: 1px solid var(--stone);
      padding: 8px 14px; text-align: left;
      font-weight: 600; font-size: 11px;
      text-transform: uppercase; letter-spacing: 0.06em;
      color: var(--graphite);
    }
    #article td {
      background: var(--linen);
      border-bottom: 1px solid var(--stone);
      border-right: 1px solid var(--stone);
      padding: 8px 14px; color: var(--graphite); vertical-align: top;
    }
    #article tr:last-child td { border-bottom: none; }
    #article th:last-child, #article td:last-child { border-right: none; }
    #article tbody tr:hover td { background: var(--white); }

    /* Images */
    #article img {
      max-width: 100%; border-radius: var(--radius-sm);
      border: 1px solid var(--stone); display: block;
      margin: 24px 0;
      box-shadow: 0 2px 8px rgba(26,26,26,0.06);
    }
    .img-placeholder {
      background: var(--parchment);
      border: 1.5px dashed var(--stone-dark);
      border-radius: var(--radius-sm);
      padding: 16px 18px; margin: 24px 0;
      display: flex; align-items: center; gap: 12px;
      color: var(--ash); font-size: 13px;
    }

    /* Callouts */
    .callout {
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      margin-bottom: 20px;
      font-size: 14px; line-height: 1.65;
      display: flex; gap: 11px; align-items: flex-start;
    }
    .callout-icon { flex-shrink: 0; margin-top: 3px; display: inline-flex; }
    .callout-icon svg { width: 16px; height: 16px; }
    .callout-note    .callout-icon { color: var(--graphite); }
    .callout-info    .callout-icon { color: #1d4ed8; }
    .callout-tip     .callout-icon { color: #188a3c; }
    .callout-warning .callout-icon { color: #b45309; }
    .callout-danger  .callout-icon { color: #991b1b; }
    .callout-body { flex: 1; min-width: 0; }
    .callout-body p { color: inherit; margin-bottom: 0 !important; }
    .callout-body p + p { margin-top: 12px; }

    .callout-note    { background: var(--parchment);         border: 1px solid var(--stone-dark); }
    .callout-info    { background: rgba(37,99,235,0.08);     border: 1px solid rgba(37,99,235,0.28); }
    .callout-tip     { background: var(--mint);              border: 1px solid rgba(34,197,94,0.30); }
    .callout-warning { background: rgba(245,158,11,0.1);     border: 1px solid rgba(245,158,11,0.30); }
    .callout-danger  { background: rgba(220,38,38,0.08);     border: 1px solid rgba(220,38,38,0.28); }

    .callout-note    .callout-label { color: var(--graphite); font-weight: 600; }
    .callout-info    .callout-label { color: #1d4ed8;         font-weight: 600; }
    .callout-tip     .callout-label { color: #188a3c;         font-weight: 600; }
    .callout-warning .callout-label { color: #b45309;         font-weight: 600; }
    .callout-danger  .callout-label { color: #991b1b;         font-weight: 600; }

    /* Tabs */
    .tabs-container { margin-bottom: 24px; }
    .tabs-bar {
      display: flex; border-bottom: 1px solid var(--stone);
      /* Many tabs (e.g. one per provider) must scroll horizontally rather than
         widen the page past the viewport on mobile. */
      overflow-x: auto; scrollbar-width: none;
    }
    .tabs-bar::-webkit-scrollbar { display: none; }
    .tab-btn {
      padding: 7px 18px;
      font-size: 13px;
      font-family: var(--font-body); font-weight: 500;
      background: none; border: none;
      border-bottom: 2px solid transparent;
      color: var(--ash); cursor: pointer;
      transition: color var(--transition), border-color var(--transition);
      margin-bottom: -1px;
      white-space: nowrap; flex-shrink: 0;
    }
    .tab-btn:hover { color: var(--graphite); }
    .tab-btn.active { color: var(--ink); border-bottom-color: var(--green); }
    .tab-panel { display: none; padding: 20px 0 0; }
    .tab-panel.active { display: block; }
    .tab-panel > *:last-child { margin-bottom: 0; }

    .tabs-container.code-tabs {
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      overflow: hidden; background: var(--void);
      margin-bottom: 24px;
    }
    .tabs-container.code-tabs .tabs-bar {
      gap: 6px; padding: 8px 10px 0;
      border-bottom: 1px solid var(--stone);
      background: color-mix(in srgb, var(--void) 88%, var(--stone) 12%);
      overflow-x: auto; scrollbar-width: none;
    }
    .tabs-container.code-tabs .tabs-bar::-webkit-scrollbar { display: none; }
    .tabs-container.code-tabs .tab-btn {
      padding: 6px 10px;
      border: 1px solid transparent;
      border-radius: 8px 8px 0 0;
      font-size: 12px; color: #aeb6cf;
      margin-bottom: 0; white-space: nowrap;
    }
    .tabs-container.code-tabs .tab-btn:hover { color: #eef2ff; background: rgba(255,255,255,0.04); }
    .tabs-container.code-tabs .tab-btn.active {
      color: #f8fafc; background: rgba(255,255,255,0.06);
      border-color: rgba(255,255,255,0.08);
      border-bottom-color: rgba(255,255,255,0.06);
    }
    .tabs-container.code-tabs .tab-panel { padding: 0; }
    .tabs-container.code-tabs .tab-panel > pre,
    .tabs-container.code-tabs .tab-panel > .code-wrap > pre {
      margin: 0; border: none; border-radius: 0;
    }
    .tabs-container.code-tabs .code-wrap { margin: 0; }

    /* Prev/next */
    #page-nav {
      display: flex; justify-content: space-between; gap: 16px;
      padding-top: 40px; margin-top: 48px;
      border-top: 1px solid var(--stone);
    }
    .page-nav-btn {
      flex: 1; max-width: 280px;
      display: flex; flex-direction: column; gap: 4px;
      padding: 14px 18px;
      background: var(--white);
      border: 1px solid var(--stone);
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: border-color var(--transition), transform var(--transition);
      text-align: left;
      font-family: var(--font-body);
    }
    .page-nav-btn:hover { border-color: var(--stone-dark); transform: translateY(-1px); }
    .page-nav-btn.next { text-align: right; margin-left: auto; }
    .page-nav-label { font-size: 10px; color: var(--ash); text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600; }
    .page-nav-title { font-size: 14px; color: var(--ink); font-weight: 500; }
    .page-nav-spacer { flex: 1; max-width: 280px; }

    /* Heading highlight (search jump) */
    @keyframes heading-flash {
      0%   { background-color: var(--mint); }
      40%  { background-color: var(--mint); }
      100% { background-color: transparent; }
    }
    .heading-highlight {
      animation: heading-flash 2s ease-out forwards;
      border-radius: 4px;
      padding-left: 6px;
      margin-left: -6px;
    }

    /* Mobile drawer */
    #hamburger { display: none; }

    #drawer-backdrop {
      display: none;
      position: fixed; inset: 0;
      background: rgba(12,12,12,0.4);
      z-index: 200;
      opacity: 0;
      transition: opacity 0.2s ease;
    }
    #drawer-backdrop.is-open { display: block; opacity: 1; }

    #drawer {
      position: fixed;
      top: 0; left: 0; bottom: 0;
      width: min(320px, 86vw);
      background: var(--linen);
      border-right: 1px solid var(--stone);
      z-index: 201;
      transform: translateX(-100%);
      transition: transform 0.25s ease;
      overflow-y: auto;
      padding: 16px 16px 32px;
      display: flex; flex-direction: column;
    }
    #drawer.is-open { transform: translateX(0); }

    #drawer-head {
      display: flex; align-items: center; justify-content: space-between;
      padding: 4px 4px 16px;
      border-bottom: 1px solid var(--stone);
      margin-bottom: 12px;
    }
    #drawer-head .label {
      font-size: 11px; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.1em; color: var(--ash);
    }

    /* Responsive */
    #hamburger { display: none; }
    @media (max-width: 820px) {
      .card-grid { grid-template-columns: 1fr 1fr; }
      #sidebar { display: none; }
      #hamburger { display: flex; }
      .navbar-link { font-size: 0.8rem; }
      .navbar-cta { font-size: 0.75rem; padding: 0.35rem 0.75rem; }
      .navbar-inner { height: 52px; gap: 0.75rem; }
      .navbar-left, .navbar-right { gap: 0.85rem; }
      .navbar-search-btn { height: 30px; }
      :root { --header-h: 52px; }
    }
    @media (max-width: 560px) {
      .card-grid { grid-template-columns: 1fr; }
      #landing { padding: 48px 24px 80px; }
      #content { padding: 28px 0 64px; }
      #body { padding: 0 24px; }
      .navbar-inner { padding: 0 16px; }
      .navbar-left .navbar-link { display: none; }   /* hide Blog, Docs, desktop GitHub */
      .navbar-github-mobile { display: inline-flex; } /* GitHub icon left of Star */
      .navbar-right .navbar-search-btn { display: none; } /* desktop search hidden... */
      .navbar-left .navbar-search-mobile { display: inline-flex; } /* ...moved left, next to hamburger */
      .navbar-search-label, .navbar-search-kbd { display: none; }
      .navbar-search-btn { padding: 0 9px; width: 32px; }
      /* Balanced sides (hamburger+search | logo | GitHub+Star) let the logo centre on its own */
      .navbar-cta-count { display: none; }            /* drop star count to balance the bar */
      .navbar-cta { padding: 0.35rem 0.7rem; }
      .theme-toggle { bottom: 14px; right: 14px; }
      #search-input { font-size: 16px; }
    }
    @media (max-width: 360px) {
      /* Very narrow phones: drop the "Docs" suffix so hamburger+search | logo | GitHub+Star
         fits without the header overflowing (min content width is ~352px otherwise). */
      .navbar-logo-sub { display: none; }
    }
    @media (max-width: 820px) {
      .page-actions .pa-copy-label,
      .toc-toggle .toc-label { display: none; }
      .page-actions .pa-copy { padding-left: 10px; padding-right: 10px; }
      .toc-toggle { padding: 5px 10px; }
    }

    /* ─── IA: tier headers (sidebar) and tier groupings (landing) ──────── */
    .sb-tier-header {
      display: block;
      padding: 20px 10px 8px;
      margin-top: 4px;
      font-size: 11px;
      font-weight: 700;
      color: var(--ash);
      text-transform: uppercase;
      letter-spacing: 0.1em;
    }
    .sb-tier-header:first-child { margin-top: 0; padding-top: 6px; }

    .landing-tier { margin-top: 28px; }
    .landing-tier:first-child { margin-top: 0; }
    .landing-tier > h2 {
      margin: 0 0 14px;
      font-size: 13px;
      font-weight: 700;
      color: var(--ash);
      text-transform: uppercase;
      letter-spacing: 0.1em;
    }
    .landing-tier-cards {
      display: grid;
      grid-template-columns: repeat(var(--tier-cols, 3), 1fr);
      gap: 14px;
    }
    #landing-cards.card-grid {
      display: block;
    }
    @media (max-width: 900px) {
      .landing-tier-cards { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 600px) {
      .landing-tier-cards { grid-template-columns: 1fr; }
    }