:root{
  --ink:#17213a;--muted:#5e6a7d;--line:#e4e8f0;--paper:#fff;--soft:#f6f8fc;
  --brand:#5d49e8;--brand2:#2f80ed;--accent:#f39c4a;--good:#13795b;
  --shadow:0 12px 32px rgba(25,34,60,.10);--radius:18px;--max:1180px
}
*{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:1.67}
a{color:#3e3ab8;text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:#22207c}
img{max-width:100%}.wrap{width:min(var(--max),calc(100% - 36px));margin:auto}
.skip{position:absolute;left:-9999px;top:8px;background:#fff;padding:10px;z-index:999}.skip:focus{left:8px}
.topline{background:#111827;color:#fff;font-size:.9rem;text-align:center;padding:7px 10px}
.topline a{color:#fff}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.navbar{height:72px;display:flex;align-items:center;gap:22px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:850;text-decoration:none;font-size:1.15rem;white-space:nowrap}
.logo-mark{width:35px;height:35px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:#fff;font-weight:900}
.navlinks{display:flex;align-items:center;gap:18px;margin-left:auto}.navlinks a{color:var(--ink);text-decoration:none;font-weight:650;font-size:.95rem}.navlinks a:hover{text-decoration:underline}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:11px 16px;background:linear-gradient(135deg,var(--brand),#745df3);color:#fff!important;text-decoration:none!important;font-weight:800;border:0;box-shadow:0 7px 18px rgba(93,73,232,.23)}
.btn:hover{transform:translateY(-1px);box-shadow:0 9px 22px rgba(93,73,232,.28)}
.btn.secondary{background:#fff;color:var(--brand)!important;border:1px solid #cfc9ff;box-shadow:none}
.mobile-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px;font-size:1.1rem}
.hero{padding:72px 0 58px;background:radial-gradient(circle at 80% 10%,#ece9ff 0,transparent 35%),linear-gradient(180deg,#fbfbff,#fff)}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:850;color:var(--brand)}
h1{font-size:clamp(2.15rem,4.5vw,4.4rem);line-height:1.05;letter-spacing:-.04em;margin:.3em 0 .28em}h2{font-size:clamp(1.45rem,2.4vw,2.1rem);line-height:1.18;letter-spacing:-.02em;margin:1.7em 0 .55em}h3{line-height:1.25}
.lead{font-size:1.18rem;color:var(--muted);max-width:760px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:#fff}.card:hover{box-shadow:var(--shadow)}
.card h3{margin:.3em 0}.card p{color:var(--muted);margin:.5em 0}.card a.stretch{font-weight:800}
.section{padding:56px 0}.soft{background:var(--soft)}
.article-head{padding:42px 0 28px;border-bottom:1px solid var(--line)}.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:18px}.crumbs a{color:var(--muted)}
.article-head h1{font-size:clamp(2rem,4vw,3.6rem);max-width:930px}.meta{color:var(--muted);font-size:.92rem}
.article-shell{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:48px;padding:42px 0 74px}.article p,.article li{font-size:1.03rem}.article .lede{font-size:1.18rem;color:#42506a}
.callout{border:1px solid #ddd9ff;border-radius:var(--radius);padding:22px;background:linear-gradient(135deg,#f7f5ff,#fff);margin:28px 0}.callout h3{margin-top:0}.callout p{color:#44506a}
.sidebar{position:relative}.sidebox{position:sticky;top:100px;border:1px solid var(--line);border-radius:18px;padding:22px;background:#fff;box-shadow:var(--shadow)}.sidebox h3{margin-top:0}.sidebox .btn{width:100%}.sidebox small{display:block;color:var(--muted);margin-top:10px}
.note{border-left:4px solid var(--accent);background:#fff8ef;padding:14px 16px;border-radius:0 12px 12px 0}
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:24px}.related a{display:block;border:1px solid var(--line);padding:14px;border-radius:12px;text-decoration:none;font-weight:700;background:#fff}
.sourcebox{font-size:.9rem;color:var(--muted);border-top:1px solid var(--line);margin-top:35px;padding-top:18px}.sourcebox li{font-size:.9rem}
.hubhero{padding:54px 0 30px}.tag{display:inline-block;border:1px solid #d8dce7;border-radius:999px;padding:4px 9px;font-size:.78rem;color:#556176;background:#fff}
footer{background:#111827;color:#cbd5e1;padding:46px 0 92px}footer a{color:#e5e7eb}.footergrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px}.footergrid h3{color:#fff}.fine{font-size:.86rem;color:#9ca3af;border-top:1px solid #303846;margin-top:32px;padding-top:18px}
.sticky-mobile{display:none}.list-clean{padding-left:18px}.list-clean li{margin:.4em 0}
@media(max-width:900px){
  .navlinks{display:none;position:absolute;left:18px;right:18px;top:72px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
  .navlinks.open{display:flex}.mobile-toggle{display:block}.navlinks .btn{width:100%}
  .article-shell{grid-template-columns:1fr}.sidebar{display:none}.grid{grid-template-columns:1fr 1fr}
  .sticky-mobile{display:block;position:fixed;left:12px;right:12px;bottom:12px;z-index:60}.sticky-mobile .btn{width:100%;padding:14px 18px}
}
@media(max-width:620px){.grid,.related,.footergrid{grid-template-columns:1fr}.hero{padding-top:48px}.wrap{width:min(var(--max),calc(100% - 26px))}body{padding-bottom:68px}}