/*
 * docs.webflexr.co. Two parts:
 *   1. the PUBLIC frame (html.dx-public): the design v2 tokens, written out here because the public pages do not load
 *      the shell (docs-pages.php says why), with the Hub's palette; the top bar, the left tree, the floating bottom bar.
 *   2. the ARTICLE PARTS (.dx-*), used on both sites. On the internal pages the shell defines the same tokens (--ink,
 *      --surface, --p, --c1 ...) and these rules read them, so nothing here may define a token outside html.dx-public.
 * Tokens only, never a literal colour for anything themed: the dark-on-dark trap in docs/gotchas.md. The few literals
 * are the brights themselves and the near-black text that always sits on them (#0A0A0A, design v2 §2.2).
 */

/* ============================================================ 1. tokens (public pages only) */
html.dx-public{--font-display:'Barlow Condensed','Arial Narrow','Helvetica Neue',sans-serif;--font-sans:ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,monospace;--r-card:28px;--r-card-sm:24px;--r-row:20px;--r-tile:18px;--r-sheet:32px;--r-pill:999px;
  --p:#FF8A3D;--c1:#FFD15C;--c2:#8E93FF;--c3:#B9D9C3;--accent:var(--p);--bar:#121212;--bar-ink:#8A8A92;--on-bright:#0A0A0A}
html.dx-public[data-theme=light]{--bg:#fff;--canvas:#fff;--surface:#F4F4F5;--surface-2:#EAEAEC;--surface-3:#DEDEE2;--ink:#0A0A0A;--ink-2:#52525B;--ink-3:#6B6B73;
  --line:rgb(10 10 10 / .08);--inv:#0A0A0A;--on-inv:#fff;--sheet:#fff;--scrim:rgb(10 10 10 / .42);--bar-shadow:0 14px 34px rgb(10 10 10 / .22),0 2px 6px rgb(10 10 10 / .12);
  --ok:#15803D;--warn:#B45309;--bad:#C2410C;--top-bg:rgb(255 255 255 / .86);color-scheme:light}
html.dx-public[data-theme=dark]{--bg:#000;--canvas:#000;--surface:#151515;--surface-2:#1F1F1F;--surface-3:#2A2A2A;--ink:#F5F5F5;--ink-2:#B4B4BB;--ink-3:#8E8E96;
  --line:rgb(255 255 255 / .08);--inv:#fff;--on-inv:#0A0A0A;--sheet:#151515;--scrim:rgb(0 0 0 / .6);--bar:#1A1A1A;--bar-shadow:0 14px 34px rgb(0 0 0 / .6);
  --ok:#4ADE80;--warn:#FBBF24;--bad:#FB923C;--top-bg:rgb(0 0 0 / .82);color-scheme:dark}

html.dx-public,html.dx-public body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--font-sans);-webkit-font-smoothing:antialiased;text-size-adjust:100%}
html.dx-public{scroll-padding-top:84px}
.dx-pub *,.dx-pub *::before,.dx-pub *::after{box-sizing:border-box}
.dx-pub a{color:inherit}
.dx-pub img{max-width:100%}
.dx-sr{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.dx-skip{position:absolute;left:12px;top:-60px;z-index:100;padding:10px 16px;border-radius:var(--r-pill);background:var(--inv);color:var(--on-inv);font-weight:600;text-decoration:none}
.dx-skip:focus{top:12px}
.dx-pub :focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px}

/* ---- the top bar ---- */
.dx-top{position:sticky;top:0;z-index:40;background:var(--top-bg);-webkit-backdrop-filter:saturate(1.4) blur(16px);backdrop-filter:saturate(1.4) blur(16px);border-bottom:1px solid var(--line)}
.dx-top-in{display:flex;align-items:center;gap:16px;max-width:1480px;margin:0 auto;padding:10px 28px;min-height:68px}
.dx-brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.dx-logo{display:block;height:28px;width:auto}
html[data-theme=light] .dx-logo.on-dark,html[data-theme=dark] .dx-logo.on-light{display:none}
.dx-badge{display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:7px;background:var(--p);color:var(--on-bright);font:700 11px/1 var(--font-sans);letter-spacing:.07em;text-transform:uppercase}
.dx-search{position:relative;flex:1;max-width:560px;margin:0 auto;display:flex;align-items:center}
.dx-search > .dx-i{position:absolute;left:16px;color:var(--ink-3);pointer-events:none}
.dx-search input{width:100%;height:46px;padding:0 44px 0 46px;border:0;border-radius:var(--r-pill);background:var(--surface);color:var(--ink);font:500 15px/1 var(--font-sans);-webkit-appearance:none;appearance:none}
.dx-search input::placeholder{color:var(--ink-3)}
.dx-search input:focus{outline:2px solid var(--ink);outline-offset:0;background:var(--canvas)}
.dx-k{position:absolute;right:14px;display:inline-grid;place-items:center;min-width:24px;height:24px;padding:0 6px;border-radius:7px;background:var(--surface-2);color:var(--ink-3);font:600 12px/1 var(--font-sans)}
.dx-search input:focus ~ .dx-k{display:none}
.dx-suggest{position:absolute;top:54px;left:0;right:0;z-index:50;padding:6px;border-radius:var(--r-card-sm);background:var(--sheet);box-shadow:0 24px 60px rgb(0 0 0 / .22);border:1px solid var(--line)}
.dx-suggest a{display:block;padding:10px 14px;border-radius:16px;text-decoration:none}
.dx-suggest a:hover,.dx-suggest a.on{background:var(--surface)}
.dx-suggest b{display:block;font-size:14.5px;font-weight:600}
.dx-suggest span{display:block;font-size:13px;color:var(--ink-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dx-suggest .dx-suggest-all{color:var(--ink-2);font-size:13.5px;font-weight:600}
.dx-acts{display:flex;align-items:center;gap:8px;flex:none}
.dx-round{display:inline-grid;place-items:center;width:44px;height:44px;padding:0;border:0;border-radius:50%;background:var(--surface);color:var(--ink);cursor:pointer;text-decoration:none;flex:none}
.dx-round:hover{background:var(--surface-2)}
.dx-round.sm{width:38px;height:38px}
html[data-theme=light] .dx-sun,html[data-theme=dark] .dx-moon{display:none}
.dx-pill-l{display:inline-flex;align-items:center;gap:7px;height:44px;padding:0 16px;border-radius:var(--r-pill);background:var(--surface);color:var(--ink);font-weight:600;font-size:14px;text-decoration:none}
.dx-pill-l:hover{background:var(--surface-2)}
.dx-only-phone{display:none}
.dx-adminbar{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;padding:8px 16px;background:color-mix(in srgb,var(--c1) 34%,var(--canvas));color:var(--ink);font-size:13.5px;text-align:center}
.dx-adminbar a{font-weight:700}

/* ---- the layout: left tree, main, outline ---- */
.dx-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;max-width:1480px;margin:0 auto;padding:28px 28px 120px}
.dx-wrap.has-nav{grid-template-columns:268px minmax(0,1fr)}
.dx-wrap.has-nav.has-toc{grid-template-columns:268px minmax(0,1fr) 232px}
.dx-wrap:not(.has-nav).has-toc{grid-template-columns:minmax(0,1fr) 232px}
.dx-main{min-width:0;outline:none}
.dx-wrap.has-nav .dx-main,.dx-wrap.has-toc .dx-main{max-width:800px}
.dx-home .dx-main{max-width:1100px;margin:0 auto;width:100%}
.dx-side{position:sticky;top:92px;align-self:start;max-height:calc(100vh - 110px);overflow-y:auto;overscroll-behavior:contain;padding-right:6px;scrollbar-width:thin}
.dx-aside{position:sticky;top:92px;align-self:start;max-height:calc(100vh - 110px);overflow-y:auto;scrollbar-width:thin}

/* ---- the tree (left column, and the Contents sheet) ---- */
.dx-tree-g{margin:0 0 6px}
.dx-tree-s{display:flex;align-items:center;gap:10px;min-height:42px;padding:0 12px;border-radius:var(--r-pill);color:var(--ink);font-weight:650;font-size:14.5px;text-decoration:none}
.dx-tree-s .dx-i{color:var(--ink-3);flex:none}
.dx-tree-s:hover{background:var(--surface)}
.dx-tree-s.on{background:var(--p);color:var(--on-bright)}
.dx-tree-s.on .dx-i{color:var(--on-bright)}
.dx-tree ul{list-style:none;margin:2px 0 8px;padding:0 0 0 22px;display:none}
.dx-tree-g.open ul,.dx-sheet .dx-tree ul{display:block}
.dx-tree li a{display:block;padding:7px 12px 7px 18px;border-left:1px solid var(--line);color:var(--ink-2);font-size:14px;line-height:1.35;text-decoration:none}
.dx-tree li a:hover{color:var(--ink);border-left-color:var(--ink-3)}
.dx-tree li a.on{color:var(--ink);font-weight:650;border-left:3px solid var(--p);padding-left:16px}

/* ---- the open page header (design v2 §4.1) ---- */
.dx-ph{margin:6px 0 22px}
.dx-ph-e{margin:0 0 8px;font-size:14px;font-weight:600;color:var(--ink-3)}
.dx-ph-t{margin:0;font-family:var(--font-display);font-weight:700;font-size:clamp(46px,5.4vw,78px);line-height:.92;text-transform:uppercase;letter-spacing:-.005em;color:var(--ink);overflow-wrap:anywhere}
.dx-ph-t.lg{font-size:clamp(40px,4.4vw,62px)}
.dx-ph-s{margin:12px 0 0;font-size:17px;line-height:1.5;color:var(--ink-2);max-width:62ch}
.dx-home .dx-ph{text-align:left;margin-top:28px}

/* ---- footer ---- */
.dx-foot{border-top:1px solid var(--line);padding:36px 28px 130px;color:var(--ink-2);font-size:14px}
.dx-foot-in{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;max-width:1480px;margin:0 auto}
.dx-foot p{margin:0 0 6px}
.dx-foot a{color:var(--ink);text-decoration:none}
.dx-foot a:hover{text-decoration:underline}
.dx-foot-b{font-family:var(--font-display);font-size:22px;font-weight:700;text-transform:uppercase;color:var(--ink)}
.dx-foot-h{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.dx-foot-c{max-width:1480px;margin:18px auto 0;color:var(--ink-3);font-size:13px}

/* ---- the floating bottom bar (phones; design v2 §4.5) ---- */
.dx-bar{display:none}

/* ============================================================ 2. shared parts (both sites) */
.dx-i{flex:none;vertical-align:middle}
.dx-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:0;border-radius:var(--r-pill);background:var(--surface);color:var(--ink);
  font:650 14.5px/1 var(--font-sans,system-ui);letter-spacing:-.01em;text-decoration:none;cursor:pointer;white-space:nowrap}
.dx-btn:hover{background:var(--surface-2)}
.dx-btn.ink{background:var(--inv);color:var(--on-inv)}
.dx-btn.ink:hover{opacity:.88}
.dx-link{display:inline-flex;align-items:center;gap:5px;padding:0;border:0;background:none;color:var(--ink);font:inherit;font-weight:650;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.dx-muted{color:var(--ink-3);font-size:14px}
.dx-bad{color:var(--bad)}
.dx-nowrap{white-space:nowrap}
.dx-card{margin:0 0 18px;padding:22px 24px;border-radius:var(--r-card);background:var(--surface)}
.dx-card h2{margin:0 0 8px;font-size:18px;font-weight:650;letter-spacing:-.01em}
.dx-card p{margin:0 0 10px}
.dx-card p:last-child{margin-bottom:0}
.dx-empty p .dx-btn{margin:4px 6px 0 0}
.dx-chip{display:inline-flex;align-items:center;height:22px;padding:0 9px;border-radius:var(--r-pill);font:700 11px/1 var(--font-sans,system-ui);letter-spacing:.05em;text-transform:uppercase;vertical-align:middle;white-space:nowrap}
.dx-chip.ok{background:color-mix(in srgb,var(--ok) 18%,transparent);color:var(--ok)}
.dx-chip.draft{background:var(--c1);color:#0A0A0A}
.dx-sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:34px 0 14px;font-family:var(--font-display);font-size:28px;font-weight:700;line-height:1;text-transform:uppercase;letter-spacing:.01em;color:var(--ink)}
.dx-sec-h a{font-family:var(--font-sans,system-ui);font-size:14px;font-weight:600;text-transform:none;letter-spacing:0;color:var(--ink-3);text-decoration:none}

/* breadcrumbs */
.dx-crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:2px;list-style:none;margin:0 0 14px;padding:0;font-size:13.5px;color:var(--ink-3)}
.dx-crumbs li{display:inline-flex;align-items:center;gap:2px}
.dx-crumbs a{color:var(--ink-2);text-decoration:none;padding:4px 6px;border-radius:8px}
.dx-crumbs a:hover{background:var(--surface);color:var(--ink)}
.dx-crumbs span[aria-current]{padding:4px 6px;color:var(--ink-3)}
.dx-crumb-sep{opacity:.6}

/* the meta line, the draft banner */
.dx-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:0 0 22px;color:var(--ink-3);font-size:13.5px}
.dx-dot{opacity:.6}
.dx-draft{margin:0 0 22px;padding:14px 18px;border-radius:var(--r-tile);background:var(--c1);color:#0A0A0A;font-size:14.5px;line-height:1.5}
.dx-draft code{background:rgb(255 255 255 / .5);color:#0A0A0A}

/* the article body */
.dx-body{font-size:16.5px;line-height:1.72;color:var(--ink);max-width:72ch}
.dx-body > :first-child{margin-top:0}
.dx-body h2{margin:44px 0 12px;font-size:25px;line-height:1.2;font-weight:700;letter-spacing:-.02em;scroll-margin-top:96px}
.dx-body h3{margin:30px 0 8px;font-size:19px;line-height:1.3;font-weight:650;letter-spacing:-.01em;scroll-margin-top:96px}
.dx-body h4{margin:22px 0 6px;font-size:16px;font-weight:650;color:var(--ink-2)}
.dx-body p{margin:0 0 16px}
.dx-body ul,.dx-body ol{margin:0 0 18px;padding-left:24px}
.dx-body li{margin:6px 0}
.dx-body li > ul,.dx-body li > ol{margin:6px 0 0}
.dx-body a{color:var(--ink);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--p) 80%,transparent);text-decoration-thickness:2px;text-underline-offset:3px}
.dx-body a:hover{text-decoration-color:var(--ink)}
.dx-body strong{font-weight:650}
.dx-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.dx-body code{padding:2px 6px;border-radius:6px;background:var(--surface-2);font:500 .86em/1.4 var(--font-mono,ui-monospace,monospace);overflow-wrap:anywhere}
.dx-code{margin:0 0 18px;padding:16px 18px;border-radius:var(--r-row);background:var(--surface);overflow-x:auto;font:13.5px/1.6 var(--font-mono,ui-monospace,monospace)}
.dx-code code{padding:0;background:none;overflow-wrap:normal;font-size:inherit}
.dx-tw{margin:0 0 20px;border-radius:var(--r-row);background:var(--surface);overflow-x:auto;-webkit-overflow-scrolling:touch}
.dx-body .dx-tw table,.dx-tw table{width:100%;border-collapse:collapse;font-size:14.5px;line-height:1.5}
.dx-tw th{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:11.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--ink-3);white-space:nowrap}
.dx-tw td{padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.dx-tw tr:last-child td{border-bottom:0}
.dx-callout{margin:0 0 18px;padding:14px 18px;border-radius:var(--r-tile);background:var(--surface);color:var(--ink);font-size:15.5px}
.dx-callout p{margin:0 0 8px}
.dx-callout p:last-child{margin:0}
.dx-callout.dx-tip{background:color-mix(in srgb,var(--c3) 38%,var(--surface))}
.dx-callout.dx-important,.dx-callout.dx-warning{background:color-mix(in srgb,var(--p) 22%,var(--surface))}
.dx-callout.dx-placeholder{background:var(--c1);color:#0A0A0A;border:2px dashed rgb(10 10 10 / .35)}
.dx-callout.dx-placeholder a,.dx-callout.dx-placeholder code{color:#0A0A0A}
.dx-intro{margin-bottom:20px}

/* the outline: right column on a wide screen, a fold under the title below that */
.dx-toc-h{margin:0 0 10px;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3)}
.dx-toc ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.dx-toc li a{display:block;padding:6px 0 6px 14px;margin-left:-1px;border-left:2px solid transparent;color:var(--ink-2);font-size:13.5px;line-height:1.35;text-decoration:none}
.dx-toc li.l3 a{padding-left:26px;font-size:13px}
.dx-toc li a:hover{color:var(--ink)}
.dx-toc li a.on{color:var(--ink);font-weight:650;border-left-color:var(--p)}
.dx-toc-m{display:none;margin:0 0 22px;border-radius:var(--r-tile);background:var(--surface)}
.dx-toc-m summary{display:flex;align-items:center;gap:8px;min-height:48px;padding:0 16px;font-weight:650;font-size:14.5px;cursor:pointer;list-style:none}
.dx-toc-m summary::-webkit-details-marker{display:none}
.dx-toc-m .dx-toc{padding:0 16px 14px}
.dx-toc-m .dx-toc-h{display:none}

/* lists of articles */
.dx-list{margin:0 0 22px;padding:6px;border-radius:var(--r-card);background:var(--surface)}
.dx-row{position:relative;display:flex;align-items:center;gap:14px;min-height:72px;padding:12px 14px;border-radius:var(--r-row);color:inherit;text-decoration:none}
.dx-row + .dx-row::before{content:"";position:absolute;top:0;left:74px;right:14px;height:1px;background:var(--line)}
.dx-row:hover{background:var(--surface-2)}
.dx-row:hover::before,.dx-row:hover + .dx-row::before{display:none}
.dx-row-ic{flex:none;display:grid;place-items:center;width:46px;height:46px;border-radius:15px;background:var(--canvas);color:var(--ink-2)}
.dx-row-b{flex:1;min-width:0}
.dx-row-k{display:block;margin-bottom:2px;font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-3)}
.dx-row-t{display:block;font-size:15.5px;font-weight:650;letter-spacing:-.01em;line-height:1.3}
.dx-row-m{display:block;margin-top:3px;font-size:13.5px;line-height:1.45;color:var(--ink-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.dx-snip mark{background:color-mix(in srgb,var(--c1) 70%,transparent);color:inherit;border-radius:3px;padding:0 2px}
.dx-row-e{flex:none;display:inline-flex;align-items:center;gap:4px;color:var(--ink-3);font-size:13px;font-weight:600}

/* the topic cards: the first three bright, the rest neutral (at most three brights a screen) */
.dx-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;margin:0 0 10px}
.dx-cat{display:flex;flex-direction:column;gap:8px;min-height:200px;padding:22px;border-radius:var(--r-card);background:var(--surface);color:var(--ink);text-decoration:none;transition:transform .16s ease}
.dx-cat:hover{background:var(--surface-2)}
.dx-cat:active{transform:scale(.98)}
.dx-cat.bright{background:var(--p);color:#0A0A0A}
.dx-cat.bright.c1{background:var(--c1)}
.dx-cat.bright.c2{background:var(--c2)}
.dx-cat.bright:hover{filter:brightness(1.04)}
.dx-cat-ic{display:grid;place-items:center;width:46px;height:46px;border-radius:15px;background:var(--canvas);color:var(--ink)}
.dx-cat.bright .dx-cat-ic{background:rgb(255 255 255 / .45);color:#0A0A0A}
.dx-cat-t{margin-top:6px;font-family:var(--font-display);font-size:26px;font-weight:700;line-height:1;text-transform:uppercase;letter-spacing:.01em}
.dx-cat-s{font-size:14px;line-height:1.45;color:var(--ink-2)}
.dx-cat.bright .dx-cat-s{color:rgb(10 10 10 / .7)}
.dx-cat-n{display:inline-flex;align-items:center;gap:6px;margin-top:auto;font-size:13px;font-weight:700;color:var(--ink-3)}
.dx-cat.bright .dx-cat-n{color:rgb(10 10 10 / .66)}

/* the big search on the homes and the search page */
.dx-hero-search{position:relative;display:flex;align-items:center;gap:8px;max-width:720px;margin:6px 0 10px;padding:6px 6px 6px 20px;border-radius:var(--r-pill);background:var(--surface)}
.dx-hero-search > .dx-i{color:var(--ink-3)}
.dx-hero-search input{flex:1;min-width:0;height:52px;border:0;background:transparent;color:var(--ink);font:500 17px/1 var(--font-sans,system-ui);-webkit-appearance:none;appearance:none;outline:none}
.dx-hero-search:focus-within{outline:2px solid var(--ink);outline-offset:0}
.dx-hero-search.sm input{height:44px;font-size:16px}
.dx-hero-or{margin:0 0 6px 20px;color:var(--ink-3);font-size:14px}

/* still have a question; prev/next; related; the call to action */
.dx-help,.dx-cta{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:40px 0 20px;padding:22px 24px;border-radius:var(--r-card);background:var(--surface)}
.dx-help-t,.dx-cta-t{margin:0;font-weight:650;font-size:17px}
.dx-help-s,.dx-cta-s{margin:4px 0 0;color:var(--ink-2);font-size:14.5px}
.dx-help-b{display:flex;gap:8px;flex-wrap:wrap}
.dx-cta{margin-top:34px}
.dx-pns{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:0 0 10px}
.dx-pn{display:flex;flex-direction:column;gap:6px;padding:18px 20px;border-radius:var(--r-card-sm);background:var(--surface);color:var(--ink);text-decoration:none}
.dx-pn:hover{background:var(--surface-2)}
.dx-pn.next{text-align:right;align-items:flex-end}
.dx-pn-k{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-3)}
.dx-pn-t{font-weight:650;font-size:15.5px;line-height:1.3}
.dx-related{margin-top:16px}

/* the review list (internal) */
.dx-rev td{font-size:14px}
.dx-rev .dx-src{font-size:12.5px;color:var(--ink-2);max-width:360px;overflow-wrap:anywhere}
.dx-rev .dx-src code,.dx-file{font-size:11.5px;background:transparent;padding:0;color:var(--ink-3)}
.dx-steps{margin:0;padding-left:22px}
.dx-steps li{margin:6px 0}

/* ---- the assistant ---- */
.dx-fab{position:fixed;right:24px;bottom:24px;z-index:60;display:inline-flex;align-items:center;gap:9px;height:54px;padding:0 22px 0 18px;border:0;border-radius:var(--r-pill);
  background:var(--p);color:#0A0A0A;font:700 15px/1 var(--font-sans,system-ui);cursor:pointer;box-shadow:0 10px 24px rgb(0 0 0 / .22)}
.dx-fab:hover{filter:brightness(1.05)}
.dx-fab:active{transform:scale(.97)}
body.dx-chat-open .dx-fab{display:none}
.dx-chat,.dx-sheet{position:fixed;inset:0;z-index:90}
.dx-chat[hidden],.dx-sheet[hidden]{display:none}
.dx-chat-mask{position:absolute;inset:0;background:var(--scrim)}
.dx-chat-card{position:absolute;right:24px;bottom:24px;display:flex;flex-direction:column;width:min(440px,calc(100vw - 32px));height:min(680px,calc(100vh - 48px));
  border-radius:var(--r-sheet);background:var(--sheet);color:var(--ink);box-shadow:0 24px 60px rgb(0 0 0 / .32);overflow:hidden}
.dx-chat-head{display:flex;align-items:center;gap:12px;padding:18px 16px 14px 20px;border-bottom:1px solid var(--line)}
.dx-chat-head > div{flex:1;min-width:0}
.dx-chat-ic{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--p);color:#0A0A0A;flex:none}
.dx-chat-h{margin:0;font-family:var(--font-display);font-size:24px;font-weight:700;line-height:1;text-transform:uppercase}
.dx-chat-s{margin:3px 0 0;font-size:12.5px;color:var(--ink-3)}
.dx-chat-log{flex:1;overflow-y:auto;padding:16px;overscroll-behavior:contain}
.dx-msg{max-width:92%;margin:0 0 12px;padding:12px 15px;border-radius:20px;font-size:15px;line-height:1.55}
.dx-msg p{margin:0 0 8px}
.dx-msg p:last-child{margin:0}
.dx-msg ul{margin:4px 0 8px;padding-left:20px}
.dx-msg.bot{background:var(--surface);border-bottom-left-radius:6px}
.dx-msg.me{margin-left:auto;background:var(--inv);color:var(--on-inv);border-bottom-right-radius:6px;white-space:pre-wrap}
.dx-msg.err{background:color-mix(in srgb,var(--bad) 14%,var(--surface))}
.dx-cite{display:inline-grid;place-items:center;min-width:19px;height:19px;margin:0 1px;padding:0 5px;border-radius:var(--r-pill);background:var(--p);color:#0A0A0A!important;font-size:11px;font-weight:700;text-decoration:none!important;vertical-align:2px}
.dx-srcs{margin-top:10px;padding-top:10px;border-top:1px solid var(--line);font-size:13px}
.dx-srcs a{display:flex;gap:8px;align-items:baseline;padding:4px 0;color:var(--ink);text-decoration:none}
.dx-srcs a:hover{text-decoration:underline}
.dx-srcs b{flex:none;display:inline-grid;place-items:center;min-width:19px;height:19px;border-radius:var(--r-pill);background:var(--surface-2);font-size:11px}
.dx-msg-acts{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.dx-msg-acts .dx-btn{min-height:38px;padding:0 14px;font-size:13.5px;background:var(--canvas)}
.dx-msg-acts .dx-btn.ink{background:var(--inv)}
.dx-typing{display:inline-flex;gap:4px;padding:4px 0}
.dx-typing i{width:7px;height:7px;border-radius:50%;background:var(--ink-3);animation:dx-dot 1s infinite ease-in-out}
.dx-typing i:nth-child(2){animation-delay:.15s}.dx-typing i:nth-child(3){animation-delay:.3s}
@keyframes dx-dot{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.dx-chat-form{display:flex;align-items:flex-end;gap:8px;margin:0 12px;padding:6px 6px 6px 16px;border-radius:24px;background:var(--surface)}
.dx-chat-form:focus-within{outline:2px solid var(--ink)}
.dx-chat-form textarea{flex:1;min-height:42px;max-height:140px;padding:10px 0;border:0;background:transparent;color:var(--ink);font:500 16px/1.4 var(--font-sans,system-ui);resize:none;outline:none}
.dx-send{display:grid;place-items:center;width:42px;height:42px;border:0;border-radius:50%;background:var(--p);color:#0A0A0A;cursor:pointer;flex:none}
.dx-send:disabled{opacity:.5;cursor:default}
.dx-chat-f{margin:8px 18px 14px;font-size:12px;line-height:1.4;color:var(--ink-3)}
.dx-chat-f a{color:var(--ink-2)}
.dx-sheet-card{position:absolute;left:0;right:0;bottom:0;max-height:86vh;display:flex;flex-direction:column;border-radius:var(--r-sheet) var(--r-sheet) 0 0;background:var(--sheet);color:var(--ink);overflow:hidden}
.dx-sheet-body{overflow-y:auto;padding:10px 12px calc(20px + env(safe-area-inset-bottom))}

/* ---- the internal pages, inside the shell ---- */
.dx-int{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
.dx-int.has-toc{grid-template-columns:minmax(0,1fr) 220px}
.dx-int-main{min-width:0}
.dx-int .dx-aside{top:24px}
.dx-fab.int{bottom:calc(var(--wfx-tabbar-h,0px) + 24px)}

/* ============================================================ responsive */
@media (max-width:1240px){
  .dx-wrap.has-nav.has-toc{grid-template-columns:248px minmax(0,1fr)}
  .dx-wrap.has-toc:not(.has-nav){grid-template-columns:minmax(0,1fr)}
  .dx-wrap .dx-aside{display:none}
  .dx-wrap.has-toc .dx-toc-m{display:block}
  .dx-int.has-toc{grid-template-columns:minmax(0,1fr)}
  .dx-int .dx-aside{display:none}
  .dx-int.has-toc .dx-toc-m{display:block}
}
@media (max-width:980px){
  .dx-wrap.has-nav,.dx-wrap.has-nav.has-toc{grid-template-columns:minmax(0,1fr)}
  .dx-side{display:none}
  .dx-only-wide{display:none}
  .dx-top-in{padding:10px 16px;gap:10px}
  .dx-wrap{padding:20px 16px 130px}
  .dx-foot{padding:30px 16px 130px}
  .dx-foot-in{grid-template-columns:1fr}
  .dx-fab{display:none}
  .dx-fab.int{display:inline-flex;right:16px;height:48px;padding:0 16px 0 14px}
  .dx-bar{position:fixed;left:16px;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));z-index:70;display:flex;align-items:center;justify-content:space-around;gap:4px;
    height:68px;padding:0 8px;border-radius:34px;background:var(--bar);box-shadow:var(--bar-shadow),inset 0 0 0 1px rgb(255 255 255 / .06)}
  .dx-tab{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:52px;height:52px;padding:0 14px;border:0;border-radius:26px;background:transparent;color:var(--bar-ink);font:650 14px/1 var(--font-sans);text-decoration:none;cursor:pointer}
  .dx-tab span{display:none}
  .dx-tab.on{background:var(--p);color:#0A0A0A;padding:0 18px}
  .dx-tab.on span{display:inline}
  .dx-chat-card{left:0;right:0;bottom:0;width:auto;height:min(88vh,760px);border-radius:var(--r-sheet) var(--r-sheet) 0 0}
  .dx-chat-f{margin-bottom:calc(14px + env(safe-area-inset-bottom))}
}
@media (max-width:640px){
  .dx-search{display:none}
  .dx-only-phone{display:inline-grid}
  .dx-brand{margin-right:auto}
  .dx-ph-t{font-size:clamp(44px,13vw,58px)}
  .dx-ph-t.lg{font-size:clamp(36px,10vw,50px)}
  .dx-ph-s{font-size:15.5px}
  .dx-body{font-size:16px}
  .dx-body h2{font-size:22px}
  .dx-cards{grid-template-columns:1fr 1fr;gap:10px}
  .dx-cat{min-height:170px;padding:18px}
  .dx-cat-t{font-size:22px}
  .dx-cat-s{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
  .dx-pns{grid-template-columns:1fr}
  .dx-pn.next{text-align:left;align-items:flex-start}
  .dx-row-e{display:none}
  .dx-help,.dx-cta{padding:20px}
  .dx-hero-search{padding-left:16px}
  .dx-hero-search .dx-btn{padding:0 16px}
}
@media (prefers-reduced-motion:reduce){
  .dx-pub *,.dx-int *{transition:none!important;animation:none!important}
}