:root{
  --ink:#172033;--muted:#5d6678;--paper:#fff;--soft:#f5f7fb;--line:#e4e8f0;
  --brand:#6c4cff;--brand2:#4b2ed3;--accent:#f3b33d;--success:#14855f;
  --radius:18px;--shadow:0 14px 40px rgba(24,32,51,.09);
  --max:1180px;--reading:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);line-height:1.68}
a{color:var(--brand2);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--brand)}
img{max-width:100%;height:auto}
.container{width:min(calc(100% - 32px),var(--max));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-row{min-height:72px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:850;letter-spacing:-.02em;white-space:nowrap}
.brand-mark{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),#9d8cff);color:white;font-weight:900}
nav{display:flex;align-items:center;gap:18px;margin-left:auto}
nav a{font-size:.94rem;color:var(--ink);text-decoration:none;font-weight:650}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff!important;text-decoration:none!important;padding:11px 17px;border-radius:999px;font-weight:800;border:0;box-shadow:0 7px 20px rgba(108,76,255,.2)}
.btn:hover{background:var(--brand2)}
.btn.secondary{background:#fff;color:var(--brand2)!important;border:1px solid #cfc6ff;box-shadow:none}
.mobile-toggle{display:none;margin-left:auto;border:0;background:var(--soft);width:42px;height:42px;border-radius:12px;font-size:20px}
.hero{background:radial-gradient(circle at 85% 10%,#ece8ff,transparent 38%),linear-gradient(180deg,#fbfbff,#fff);padding:76px 0 54px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:44px;align-items:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;font-weight:800;color:var(--brand2);font-size:.82rem;text-transform:uppercase;letter-spacing:.08em}
h1,h2,h3{line-height:1.15;letter-spacing:-.03em}
h1{font-size:clamp(2.35rem,5vw,4.4rem);margin:.25em 0 .25em}
h2{font-size:clamp(1.55rem,3vw,2.2rem);margin-top:1.7em}
h3{font-size:1.2rem;margin-top:1.4em}
.lede{font-size:1.18rem;color:var(--muted);max-width:720px}
.hero-card,.card,.cta-card,.toc,.disclosure{border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
.hero-card{padding:26px}
.hero-card strong{font-size:1.05rem}
.metric{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid var(--line)}
.metric:last-child{border:0}
.section{padding:54px 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{padding:23px}
.card h3{margin-top:0}
.card p{color:var(--muted)}
.tag{display:inline-block;font-size:.75rem;font-weight:800;border-radius:999px;padding:5px 9px;background:#f0edff;color:var(--brand2)}
.breadcrumbs{font-size:.84rem;color:var(--muted);padding:21px 0 4px}
.breadcrumbs a{color:var(--muted)}
.layout{display:grid;grid-template-columns:minmax(0,var(--reading)) 310px;gap:46px;align-items:start;padding:20px 0 68px}
.article-header{padding:18px 0 10px}
.article-header h1{font-size:clamp(2.25rem,5vw,3.75rem)}
.article-meta{font-size:.9rem;color:var(--muted)}
.article-body p,.article-body li{font-size:1.03rem}
.article-body ul,.article-body ol{padding-left:1.3em}
.article-body table{border-collapse:collapse;width:100%;margin:24px 0;font-size:.95rem}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}
.article-body th{background:var(--soft)}
.article-body blockquote{border-left:4px solid var(--brand);padding:12px 18px;margin:22px 0;background:var(--soft);border-radius:0 12px 12px 0}
.toc{padding:18px 20px;margin:20px 0 28px;box-shadow:none}
.toc strong{display:block;margin-bottom:7px}
.sidebar{position:sticky;top:94px}
.cta-card{padding:22px;background:linear-gradient(145deg,#241866,#6c4cff);color:#fff;border:0}
.cta-card p{color:#eee9ff}
.cta-card .btn{background:#fff;color:#3d25b8!important;box-shadow:none;width:100%}
.small{font-size:.82rem}
.related{margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.related ul{padding-left:1.1em}
.disclosure{padding:14px 16px;box-shadow:none;background:#fffaf0;border-color:#f3d89e;font-size:.88rem;margin:18px 0}
.callout{border-radius:16px;padding:20px 22px;background:#f3f6ff;border:1px solid #dce4ff;margin:26px 0}
.good{border-left:4px solid var(--success)}
.warn{border-left:4px solid var(--accent)}
.site-footer{background:#15182a;color:#ced2df;padding:48px 0 85px}
.site-footer a{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:35px}
.footer-grid h3{color:#fff}
.footer-links{display:grid;gap:8px}
.mobile-cta{display:none}
.kicker{font-size:.9rem;color:var(--muted);font-weight:700}
.category-intro{max-width:780px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 0}
.compare .card{box-shadow:none}
@media(max-width:900px){
  nav{display:none;position:absolute;left:16px;right:16px;top:64px;flex-direction:column;align-items:stretch;background:#fff;padding:16px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
  nav.open{display:flex}
  nav .btn{text-align:center}
  .desktop-cta{display:none}
  .mobile-toggle{display:block}
  .hero-grid,.layout,.footer-grid{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
  .sidebar{position:static}
  .sidebar .cta-card{display:none}
  .mobile-cta{display:block;position:fixed;left:14px;right:14px;bottom:12px;z-index:30}
  .mobile-cta .btn{width:100%;box-shadow:0 10px 30px rgba(37,30,78,.28)}
  .site-footer{padding-bottom:105px}
}
@media(max-width:620px){
  .grid,.compare{grid-template-columns:1fr}
  .hero{padding-top:48px}
  .container{width:min(calc(100% - 24px),var(--max))}
}

.mobile-nav-cta{display:none}
@media(max-width:900px){.mobile-nav-cta{display:inline-flex}}