:root{
  --ink:#111113;
  --body:#393940;
  --muted:#6b6b76;
  --quiet:#90909a;
  --paper:#ffffff;
  --paper-soft:#f7f7fa;
  --line:#e5e5eb;
  --line-strong:#d1d1da;
  --accent:var(--brand-accent,#7a5af8);
  --accent-soft:#f0ecff;
  --blue:#5268d7;
  --blue-soft:#eef0ff;
  --amber:#8b5b08;
  --font:"Montserrat",-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  --reading:720px;
  --shell:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--body);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-wrap:anywhere}
body,button,input{letter-spacing:0}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.16;letter-spacing:0}
p{margin:0}
svg{display:block}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 32%,transparent);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;left:16px;top:12px;z-index:1000;padding:9px 13px;border-radius:5px;background:var(--ink);color:#fff;transform:translateY(-150%)}
.skip-link:focus{transform:translateY(0)}

/* Shared structure */
.blog-shell,.blog-main,.nav-shell,.footer-shell{width:min(calc(100% - 40px),var(--shell));margin-inline:auto}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 17px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;color:var(--ink);font-size:13px;font-weight:750;white-space:nowrap}
.button:hover{border-color:var(--accent);color:var(--accent)}
.button-primary{border-color:var(--accent);background:var(--accent);color:#fff}
.button-primary:hover{border-color:color-mix(in srgb,var(--accent) 82%,#000);background:color-mix(in srgb,var(--accent) 82%,#000);color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(229,229,235,.92);background:rgba(255,255,255,.96);backdrop-filter:blur(12px)}
.nav-shell{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:28px;min-height:70px}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0;color:var(--ink);font-weight:800}
.brand-mark{display:grid;place-items:center;flex:0 0 35px;width:35px;height:35px;border-radius:8px;background:var(--accent);color:#fff;font-size:15px}
.brand-mark-small{width:30px;height:30px;flex-basis:30px;font-size:13px}
.brand-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.brand-logo{width:auto;max-width:180px;height:36px;object-fit:contain;object-position:left center}
.main-nav{display:flex;align-items:center;justify-content:flex-end;gap:25px;min-width:0}
.main-nav a{position:relative;color:var(--muted);font-size:13px;font-weight:650;white-space:nowrap}
.main-nav a:hover,.main-nav a.is-active{color:var(--ink)}
.main-nav a.is-active:after{content:"";position:absolute;left:0;right:0;bottom:-9px;height:2px;background:var(--accent)}
.menu-toggle{display:none;width:40px;height:40px;padding:10px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
.menu-toggle>span:not(.sr-only){display:block;width:18px;height:2px;margin:4px auto;background:var(--ink)}

/* Index */
.blog-main{padding-top:28px;padding-bottom:80px}
.breadcrumbs{margin-bottom:36px;color:var(--quiet);font-size:12px}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:0;margin:0;padding:0;list-style:none}
.breadcrumbs li:not(:last-child):after{content:"/";margin:0 8px;color:var(--line-strong)}
.breadcrumbs a:hover{color:var(--accent)}
.blog-hero{max-width:780px;padding:12px 0 42px}
.eyebrow{margin-bottom:11px;color:var(--accent);font-size:12px;font-weight:800;text-transform:uppercase}
.blog-hero h1{font-size:50px;font-weight:790}
.blog-hero .lead{max-width:700px;margin-top:17px;color:var(--muted);font-size:18px;line-height:1.55}
.blog-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:30px;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cat-filter{display:flex;align-items:center;gap:7px;min-width:0;overflow-x:auto;scrollbar-width:thin}
.cat-chip,.tag-chip{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 11px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted);font-size:12px;font-weight:700;white-space:nowrap}
.cat-chip:hover,.cat-chip.is-active,.tag-chip:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}
.cat-chip small{font-size:10px;color:var(--quiet)}
.blog-search{display:flex;align-items:center;flex:0 0 270px;height:40px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;overflow:hidden}
.blog-search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 13%,transparent)}
.blog-search input{min-width:0;flex:1;height:100%;padding:0 12px;border:0;outline:0;background:transparent;color:var(--ink);font-size:13px}
.blog-search button{display:grid;place-items:center;width:40px;height:40px;padding:0;border:0;background:transparent;color:var(--muted);cursor:pointer}
.blog-search button:hover{color:var(--accent)}.blog-search svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8}

/* Cards */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card,.post-featured{min-width:0;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#fff;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.post-card:hover,.post-featured:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 34%,var(--line));box-shadow:0 14px 35px rgba(17,17,19,.08)}
.post-featured{grid-column:1/-1}.post-featured .card-link{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.9fr);min-height:360px}
.post-thumb{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--paper-soft)}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-thumb img,.post-featured:hover .post-thumb img{transform:scale(1.025)}
.post-featured .post-thumb{height:100%;aspect-ratio:auto}
.post-body{display:flex;flex-direction:column;padding:20px}
.post-featured .post-body{justify-content:center;padding:34px}
.featured-badge{align-self:flex-start;margin-bottom:13px;padding:3px 8px;border-radius:4px;background:var(--blue-soft);color:var(--blue);font-size:10px;font-weight:800;text-transform:uppercase}
.post-cat{display:inline-flex;align-self:flex-start;margin-bottom:11px;color:var(--accent);font-size:11px;font-weight:800;text-transform:uppercase}
.post-body h2{font-size:30px}.post-body h3{font-size:20px}.post-body p{margin-top:11px;color:var(--muted);font-size:14px;line-height:1.55}
.post-meta{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:21px;color:var(--quiet);font-size:11px}
.post-meta .dot,.article-byline .sep{width:3px;height:3px;border-radius:50%;background:var(--line-strong)}
.pagination{display:flex;justify-content:center;gap:6px;margin-top:36px}.pagination a,.pagination span{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--line);border-radius:5px;color:var(--muted);font-size:12px}.pagination a:hover{border-color:var(--accent);color:var(--accent)}.pagination .is-current{border-color:var(--accent);background:var(--accent);color:#fff}.pagination .is-disabled{opacity:.45}
.empty-state{display:grid;justify-items:center;padding:70px 24px;border:1px dashed var(--line-strong);border-radius:8px;background:var(--paper-soft);text-align:center}.empty-state svg{width:32px;color:var(--quiet)}.empty-state h3{margin-top:14px;font-size:20px}.empty-state p{max-width:430px;margin-top:7px;color:var(--muted);font-size:14px}.search-summary{margin:0 0 22px;color:var(--muted)}

/* Article */
.article{padding-bottom:0}.article-head{max-width:900px;margin:12px auto 36px;text-align:center}.article-head .post-cat{display:inline-flex}.article-head h1{font-size:50px}.article-lead{max-width:780px;margin:19px auto 0;color:var(--muted);font-size:20px;line-height:1.55}
.article-byline{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:9px;margin-top:23px;color:var(--muted);font-size:12px}.article-byline strong{color:var(--ink)}
.avatar{display:grid;place-items:center;flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-size:10px;font-weight:800}
.article-cover{margin:0 0 45px}.article-cover img{width:100%;max-height:650px;object-fit:cover;border-radius:7px}.article-cover figcaption{margin-top:8px;color:var(--quiet);font-size:11px;text-align:center}
.article-layout{display:grid;grid-template-columns:minmax(0,var(--reading)) 240px;justify-content:center;gap:64px;align-items:start}
.article-body{min-width:0;color:#35353d;font-size:18px;line-height:1.78}.article-body>p,.article-body>ul,.article-body>ol,.article-body>blockquote,.article-body>table,.article-body>pre{margin:0 0 23px}
.article-body h2,.article-body h3,.article-body h4{scroll-margin-top:95px}.article-body h2{margin:46px 0 17px;font-size:31px}.article-body h3{margin:34px 0 13px;font-size:24px}.article-body h4{margin:28px 0 10px;font-size:19px}
.article-body a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}.article-body strong{color:var(--ink)}.article-body ul,.article-body ol{padding-left:25px}.article-body li{margin-bottom:8px}
.article-body blockquote{padding:17px 20px;border-left:4px solid var(--accent);background:var(--accent-soft);color:var(--ink)}
.article-body pre{padding:17px;overflow-x:auto;border-radius:6px;background:#18181d;color:#f7f7fa;font:13px/1.65 "SFMono-Regular",Consolas,monospace}.article-body code{font-family:"SFMono-Regular",Consolas,monospace;font-size:.86em}
.article-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px}.article-body th,.article-body td{padding:10px 12px;border:1px solid var(--line);text-align:left}.article-body th{background:var(--paper-soft);color:var(--ink)}.article-body img{border-radius:6px}
.article-cover-fallback img{aspect-ratio:1200/630;object-fit:cover}
.article-ai-summary{margin:0 0 32px;padding:22px;border:1px solid #d8d0ff;border-radius:8px;background:#f8f6ff}.article-ai-summary-head{display:flex;justify-content:space-between;gap:14px;margin-bottom:12px;color:var(--accent);font-size:11px;font-weight:750;text-transform:uppercase}.article-ai-summary-head strong{color:var(--muted);font-weight:650;text-transform:none}.article-body .article-ai-summary h2{margin:0 0 12px;font-size:23px}.article-ai-summary ul{margin:0;padding-left:22px}.role-summaries{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:16px}.role-summaries details{padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:#fff}.role-summaries summary{color:var(--ink);font-size:12px;font-weight:750;cursor:pointer}.role-summaries p{margin:8px 0 0;color:var(--muted);font-size:13px;line-height:1.55}
.article-body .article-diagram{margin:34px 0;padding:23px;border:1px solid #dce0f6;border-radius:8px;background:#f7f8fd}.article-diagram-kicker{margin-bottom:7px;color:var(--blue);font-size:10px;font-weight:800;text-transform:uppercase}.article-body .article-diagram h3{margin:0 0 18px;font-size:22px}.article-flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(116px,1fr));gap:8px}.article-flow span{display:grid;align-content:start;gap:7px;min-height:96px;padding:12px;border:1px solid #dfe2f0;border-radius:6px;background:#fff;color:var(--ink);font-size:12px;line-height:1.4}.article-flow b{display:grid;place-content:center;width:24px;height:24px;border-radius:50%;background:var(--blue-soft);color:var(--blue);font-size:10px}.article-diagram figcaption{margin-top:14px;color:var(--quiet);font-size:11px;text-align:left}
.article-demo{display:grid;grid-template-columns:minmax(0,.85fr) minmax(250px,1.15fr);gap:20px;margin:36px 0;padding:22px;border:1px solid #ddd4ff;border-radius:8px;background:#f8f6ff}.article-demo>div{align-self:center}.article-demo>div>span{color:var(--accent);font-size:10px;font-weight:800;text-transform:uppercase}.article-body .article-demo h3{margin:7px 0 8px;font-size:22px}.article-demo p{margin:0 0 15px;color:var(--muted);font-size:13px;line-height:1.55}.article-demo a{display:inline-flex;align-items:center;min-height:39px;padding:0 14px;border-radius:8px;background:var(--accent);color:#fff;font-size:12px;font-weight:750;text-decoration:none}.article-demo iframe{width:100%;min-height:300px;border:1px solid var(--line);border-radius:6px;background:#fff}
.article-sources,.article-knowledge{margin:38px 0 0;padding-top:25px;border-top:1px solid var(--line)}.article-body .article-sources h2,.article-body .article-knowledge h2{margin:0 0 14px;font-size:23px}.article-sources ol{margin:0;padding-left:22px}.article-sources li{padding-left:3px;color:var(--muted);font-size:13px;overflow-wrap:anywhere}.article-knowledge>span{display:block;margin-bottom:6px;color:var(--accent);font-size:10px;font-weight:800;text-transform:uppercase}.knowledge-nodes{display:flex;flex-wrap:wrap;gap:7px}.knowledge-nodes a,.knowledge-nodes>span{display:grid;gap:2px;min-width:128px;padding:9px 11px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);font-size:12px;text-decoration:none}.knowledge-nodes a:hover{border-color:var(--accent)}.knowledge-nodes small{color:var(--quiet);font-size:9px}
.reader-ai-tools{display:flex;flex-wrap:wrap;gap:5px;margin:-12px 0 21px}.reader-ai-tools button{padding:5px 8px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--muted);font:inherit;font-size:10px;cursor:pointer}.reader-ai-tools button:hover{border-color:var(--accent);color:var(--accent)}.reader-ai-tools button:disabled{opacity:.55;cursor:wait}.reader-ai-result{margin:-11px 0 22px;padding:12px 14px;border-left:3px solid var(--accent);background:var(--paper-soft);color:var(--muted);font-size:13px;line-height:1.55}
.toc{position:relative}.toc-inner{position:sticky;top:100px;max-height:calc(100vh - 130px);overflow-y:auto;overscroll-behavior:contain;padding-left:17px;border-left:1px solid var(--line)}.toc h2{margin-bottom:13px;font-size:12px;text-transform:uppercase}.toc ul{display:grid;gap:8px;margin:0;padding:0;list-style:none}.toc li{line-height:1.35}.toc li.lvl-3{padding-left:12px}.toc a{color:var(--muted);font-size:12px}.toc a:hover,.toc a.is-active{color:var(--accent)}
.article-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:39px;padding-top:23px;border-top:1px solid var(--line)}
.share{display:flex;align-items:center;gap:8px;margin-top:22px;color:var(--muted);font-size:12px}.share a,.share button{display:grid;place-items:center;width:34px;height:34px;padding:0;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--muted);cursor:pointer}.share a:hover,.share button:hover,.share button.is-copied{border-color:var(--accent);color:var(--accent)}.share svg{width:16px;height:16px;fill:currentColor}.share button svg{fill:none;stroke:currentColor;stroke-width:1.7}
.author-box{display:flex;gap:14px;margin-top:28px;padding:19px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.author-box .avatar{flex-basis:44px;width:44px;height:44px}.author-box h3{font-size:15px}.author-box p{margin-top:4px;color:var(--muted);font-size:13px;line-height:1.55}
.adjacent-nav{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin:55px auto 0;padding-top:25px;border-top:1px solid var(--line)}.adjacent-nav a{display:grid;gap:5px}.adjacent-nav a.next{text-align:right}.adjacent-nav span{color:var(--quiet);font-size:11px}.adjacent-nav strong{color:var(--ink);font-size:14px}.adjacent-nav a:hover strong{color:var(--accent)}
.article-cta{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:14px 28px;margin-top:45px;padding:28px;border:1px solid color-mix(in srgb,var(--accent) 28%,var(--line));border-radius:8px;background:var(--accent-soft)}.article-cta h2{font-size:23px}.article-cta p{color:var(--muted);font-size:14px}.article-cta .button{grid-column:2;grid-row:1/3}
.related{padding-bottom:70px}.related>h2{margin-bottom:21px;font-size:27px}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:var(--paper-soft)}
.footer-shell{display:grid;grid-template-columns:1.2fr 1fr;gap:34px;padding-top:48px;padding-bottom:30px}.footer-brand-block p{max-width:440px;margin-top:13px;color:var(--muted);font-size:13px}.site-footer nav{display:flex;align-items:flex-start;justify-content:flex-end;gap:22px}.site-footer nav a{color:var(--muted);font-size:12px;font-weight:650}.site-footer nav a:hover{color:var(--accent)}
.footer-bottom{grid-column:1/-1;display:flex;justify-content:space-between;padding-top:25px;border-top:1px solid var(--line);color:var(--quiet);font-size:11px}

@media(max-width:980px){
  .nav-shell{gap:16px}.main-nav{gap:16px}.post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{grid-template-columns:minmax(0,var(--reading));gap:0}.toc{display:none}.article-head h1{font-size:42px}
}
@media(max-width:760px){
  .blog-shell,.blog-main,.nav-shell,.footer-shell{width:min(calc(100% - 28px),var(--shell))}.nav-shell{grid-template-columns:auto auto 1fr;min-height:64px}.menu-toggle{display:block;grid-column:3;justify-self:end}.nav-cta{display:none}.main-nav{position:absolute;left:14px;right:14px;top:58px;display:none;align-items:stretch;padding:8px;border:1px solid var(--line-strong);border-radius:8px;background:#fff;box-shadow:0 14px 35px rgba(17,17,19,.12)}.main-nav.is-open{display:grid}.main-nav a{padding:9px 10px;border-radius:4px}.main-nav a:hover{background:var(--paper-soft)}.main-nav a.is-active:after{display:none}
  .blog-main{padding-top:20px;padding-bottom:58px}.breadcrumbs{margin-bottom:25px}.blog-hero{padding:6px 0 31px}.blog-hero h1{font-size:38px}.blog-hero .lead{font-size:16px}.blog-toolbar{align-items:stretch;flex-direction:column}.blog-search{flex:0 0 40px;width:100%}.post-grid{grid-template-columns:1fr}.post-featured .card-link{grid-template-columns:1fr;min-height:0}.post-featured .post-thumb{aspect-ratio:16/10}.post-featured .post-body{padding:22px}.post-body h2{font-size:25px}
  .article-head{margin-bottom:28px}.article-head h1{font-size:36px}.article-lead{font-size:17px}.article-cover{margin-bottom:31px}.article-body{font-size:17px}.article-body h2{font-size:27px}.article-body h3{font-size:22px}.role-summaries,.article-demo{grid-template-columns:1fr}.article-ai-summary,.article-body .article-diagram,.article-demo{padding:18px}.article-demo iframe{min-height:260px}.adjacent-nav{grid-template-columns:1fr;gap:18px}.adjacent-nav a.next{text-align:left}.article-cta{grid-template-columns:1fr;padding:22px}.article-cta .button{grid-column:1;grid-row:auto;justify-self:start}.related{padding-bottom:55px}.footer-shell{grid-template-columns:1fr;padding-top:38px}.site-footer nav{justify-content:flex-start;flex-wrap:wrap}.footer-bottom{gap:18px;align-items:flex-start;flex-direction:column}
}
@media(max-width:420px){.blog-hero h1,.article-head h1{font-size:32px}.article-byline .sep{display:none}.article-byline{gap:7px 11px}.post-body h3{font-size:19px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.post-card,.post-featured,.post-thumb img{transition:none}.post-card:hover,.post-featured:hover{transform:none}}