:root{
  --bg:#fbfcff;--surface:#fff;--soft:#f5f7ff;--ink:#111b34;--muted:#697691;--line:#e7ebf4;
  --blue:#287df2;--purple:#713cf0;--green:#10b981;--orange:#f59e0b;
  --shadow:0 30px 90px rgba(52,68,125,.13);--shadow-sm:0 14px 40px rgba(52,68,125,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;overflow-x:hidden}
a{text-decoration:none;color:inherit}
button{font:inherit}
.container{width:min(1160px,calc(100% - 48px));margin:auto}
.skip{position:fixed;left:14px;top:-60px;z-index:100;padding:10px 14px;border-radius:9px;background:var(--ink);color:#fff}.skip:focus{top:14px}
.ambient{position:fixed;border-radius:50%;filter:blur(110px);pointer-events:none;z-index:-2;opacity:.22}
.ambient.a{width:470px;height:470px;background:#7865ff;right:-190px;top:-170px}
.ambient.b{width:430px;height:430px;background:#50c8ff;left:-200px;bottom:-220px}
.dots{position:fixed;inset:0;z-index:-3;pointer-events:none;opacity:.22;background-image:radial-gradient(#aeb9d5 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(#000,transparent 65%)}

/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(251,252,255,.78);backdrop-filter:blur(20px);border-bottom:1px solid rgba(224,229,240,.75)}
.nav{min-height:80px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:11px;margin-right:auto}
.brand-logo{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;color:#fff;font:800 12px "Space Grotesk",sans-serif;background:linear-gradient(135deg,var(--blue),var(--purple));box-shadow:0 12px 28px rgba(85,76,228,.25)}
.brand-copy strong,.brand-copy small{display:block}.brand-copy strong{font:700 16px "Space Grotesk",sans-serif}.brand-copy small{color:var(--muted);font-size:11px;margin-top:-4px}
.nav-links{display:flex;align-items:center;gap:25px}.nav-links a{font-size:13px;font-weight:700;color:#27324b;position:relative}.nav-links a:after{content:"";position:absolute;left:0;right:100%;bottom:-7px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--purple));transition:right .25s}.nav-links a:hover:after{right:0}
.header-cta{padding:11px 17px;border:1px solid var(--line);border-radius:13px;background:#fff;box-shadow:var(--shadow-sm);font-size:12px;font-weight:800}.header-cta span{color:var(--purple);margin-left:5px}
.nav-toggle{display:none;border:0;background:transparent;width:42px;height:42px}.nav-toggle i{display:block;width:22px;height:2px;background:var(--ink);margin:5px auto;border-radius:4px}

/* Reading progress */
.progress{position:fixed;top:0;left:0;width:100%;height:3px;z-index:80;pointer-events:none}.progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--purple),#b84cff);box-shadow:0 0 13px rgba(92,73,239,.35)}

/* Article hero */
.article-hero{padding:92px 0 55px}
.breadcrumbs{display:flex;align-items:center;gap:8px;color:#78849f;font-size:12px;margin-bottom:28px}.breadcrumbs a:hover{color:var(--purple)}.breadcrumbs b{color:#c4cada}
.category{display:inline-flex;align-items:center;gap:8px;padding:8px 13px;border:1px solid #e5e8f5;background:#f5f5ff;border-radius:999px;color:#5d6797;font-size:11px;font-weight:850;letter-spacing:.02em}
.category i{width:6px;height:6px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--purple))}
.article-title{font:700 clamp(46px,6vw,76px)/1.02 "Space Grotesk",sans-serif;letter-spacing:-.065em;max-width:930px;margin-top:24px}
.article-title span{color:transparent;background:linear-gradient(90deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text}
.article-subtitle{max-width:790px;color:var(--muted);font-size:18px;line-height:1.75;margin-top:24px}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;margin-top:31px;color:#75809a;font-size:12px}.meta .dot{width:4px;height:4px;border-radius:50%;background:#b7bfd0}.author{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:750}.avatar{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:#fff;font-size:10px;font-weight:850;background:linear-gradient(135deg,var(--blue),var(--purple));box-shadow:0 8px 18px rgba(77,76,230,.2)}

/* Article body */
.article-shell{display:grid;grid-template-columns:minmax(0,760px) 270px;gap:70px;align-items:start;padding:42px 0 110px}
.article-body{min-width:0}
.article-intro{padding:28px 30px;border:1px solid #e1e6f1;background:linear-gradient(135deg,#fff,#f8f9ff);border-radius:22px;box-shadow:var(--shadow-sm);margin-bottom:48px;position:relative;overflow:hidden}.article-intro:before{content:"";position:absolute;width:150px;height:150px;border-radius:50%;right:-70px;top:-75px;background:radial-gradient(circle,#8d7cff55,transparent 70%)}.article-intro p{font-size:17px;color:#485570}
.article-body h2{font:700 clamp(30px,4vw,43px)/1.1 "Space Grotesk",sans-serif;letter-spacing:-.045em;margin:58px 0 18px}.article-body h3{font:700 24px/1.2 "Space Grotesk",sans-serif;margin:38px 0 12px}.article-body p{font-size:17px;color:#53617b;margin:0 0 21px}.article-body strong{color:var(--ink)}.article-body ul,.article-body ol{padding-left:23px;color:#53617b;font-size:17px;margin:15px 0 25px}.article-body li{padding-left:7px;margin:8px 0}
.code{margin:28px 0;padding:22px 24px;background:#0e1730;color:#dbe5ff;border:1px solid #202c4d;border-radius:20px;overflow:auto;box-shadow:0 24px 55px rgba(17,27,52,.16);font:13px/1.75 "SFMono-Regular",Consolas,monospace}.code .kw{color:#7eb4ff}.code .str{color:#caa5ff}.code .fn{color:#75e2bd}.code .cm{color:#7f8da9}
.callout{margin:34px 0;padding:23px 25px;border-left:4px solid var(--purple);border-radius:0 17px 17px 0;background:linear-gradient(90deg,#f1efff,#fafaff);color:#4d5871;font-size:16px}.callout strong{color:var(--ink)}
.article-divider{height:1px;background:var(--line);margin:54px 0 28px}

/* Sidebar */
.toc{position:sticky;top:108px;padding:22px;border:1px solid var(--line);background:rgba(255,255,255,.8);backdrop-filter:blur(15px);border-radius:20px;box-shadow:var(--shadow-sm)}.toc small{display:block;color:#78849f;font-size:9px;font-weight:900;letter-spacing:.14em;margin-bottom:14px}.toc a{display:block;color:#71809e;font-size:12px;line-height:1.45;padding:9px 0 9px 13px;border-left:2px solid transparent;transition:.2s}.toc a:hover,.toc a.active{color:var(--purple);border-left-color:var(--purple);transform:translateX(2px)}
.share-box{margin-top:16px;padding:18px;border:1px solid var(--line);background:#fff;border-radius:20px;box-shadow:var(--shadow-sm)}.share-box small{display:block;color:#78849f;font-size:9px;font-weight:900;letter-spacing:.12em;margin-bottom:9px}.share-box p{color:var(--muted);font-size:11px;line-height:1.6;margin-bottom:13px}.share-button{display:flex;align-items:center;justify-content:center;gap:7px;width:100%;padding:10px;border:1px solid #dfe4ef;border-radius:11px;background:#fff;color:#25304a;font-size:11px;font-weight:800;cursor:pointer;transition:.25s}.share-button:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:#cfd7e8}

/* LinkedIn block */
.linkedin-card{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;margin-top:42px;padding:23px;border:1px solid #dfe4ef;border-radius:22px;background:linear-gradient(135deg,#fff,#f5f8ff);box-shadow:var(--shadow-sm)}.linkedin-icon{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;background:#0a66c2;color:#fff;font:850 20px Arial}.linkedin-card strong{display:block;font:700 19px "Space Grotesk"}.linkedin-card p{font-size:12px;color:var(--muted);margin:3px 0 11px}.linkedin-card a{display:inline-flex;padding:9px 13px;border-radius:10px;background:#0a66c2;color:#fff;font-size:11px;font-weight:800;transition:.25s}.linkedin-card a:hover{transform:translateY(-2px);box-shadow:0 12px 25px rgba(10,102,194,.2)}

/* Related */
.related{padding:92px 0;border-top:1px solid var(--line);background:linear-gradient(180deg,#f6f8ff,#fbfcff)}.related-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:28px}.related-head h2{font:700 38px/1.1 "Space Grotesk";letter-spacing:-.045em}.related-head p{max-width:390px;color:var(--muted);font-size:13px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.related-card{padding:24px;border:1px solid var(--line);background:#fff;border-radius:21px;min-height:210px;transition:.3s;position:relative;overflow:hidden}.related-card:before{content:"";position:absolute;inset:-100% 30% 50% -50%;background:radial-gradient(circle,#a995ff30,transparent 65%);transition:.4s}.related-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-sm);border-color:#dbe0ee}.related-card:hover:before{transform:translate(40%,20%)}.related-card small{color:#687596;font-size:9px;font-weight:900;letter-spacing:.12em}.related-card h3{font:700 21px/1.25 "Space Grotesk";margin:14px 0 9px;position:relative}.related-card p{font-size:12px;color:var(--muted);position:relative}.related-card span{display:inline-block;margin-top:17px;color:var(--purple);font-size:11px;font-weight:850;position:relative}

/* Footer */
.footer{padding:38px 0;border-top:1px solid var(--line);background:#fff}.footer-inner{display:flex;justify-content:space-between;gap:30px;align-items:center}.footer p{font-size:11px;color:var(--muted)}.footer-links{display:flex;gap:20px}.footer-links a{font-size:11px;color:#65718d}.footer-links a:hover{color:var(--purple)}

/* Motion */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .75s ease,transform .75s cubic-bezier(.2,.8,.2,1)}.reveal.in{opacity:1;transform:none}
.float-badge{animation:float 5s ease-in-out infinite}@keyframes float{50%{transform:translateY(-8px)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.float-badge{animation:none}}
@media(max-width:950px){
  .article-shell{grid-template-columns:minmax(0,1fr);gap:28px}.toc{position:relative;top:auto;order:-1}.toc nav{display:grid;grid-template-columns:repeat(2,1fr);gap:0 18px}.share-box{display:none}
  .article-title{max-width:850px}.related-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .container{width:min(100% - 32px,680px)}.nav{min-height:72px}.nav-links,.header-cta{display:none}.nav-toggle{display:block}
  .nav.open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:66px;flex-direction:column;align-items:stretch;gap:0;padding:8px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.96);box-shadow:var(--shadow-sm)}.nav.open .nav-links a{padding:12px 14px}.nav.open .nav-links a:after{display:none}
  .article-hero{padding:64px 0 36px}.article-title{font-size:clamp(39px,12vw,58px)}.article-subtitle{font-size:16px}.article-shell{padding-top:26px}.article-body p,.article-body ul,.article-body ol{font-size:16px}.article-intro p{font-size:16px}.article-body h2{margin-top:46px}.related-grid{grid-template-columns:1fr}.footer-inner{align-items:flex-start;flex-direction:column}.footer-links{flex-wrap:wrap}
  .toc nav{grid-template-columns:1fr}
}