:root{
  --bg:#070809;
  --surface:#101116;
  --surface-2:#151720;
  --text:#f4f4f6;
  --muted:#a8a8b3;
  --quiet:#777985;
  --line:#292b35;
  --violet:#9f94ff;
  --violet-strong:#7b6cf6;
  --cyan:#9ce7df;
  --yellow:#eadb75;
  --max:1180px;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Geist,Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
img{max-width:100%;height:auto}
.skip-link{position:absolute;left:-9999px;top:8px;z-index:20;background:#fff;color:#000;padding:10px 14px;border-radius:8px}
.skip-link:focus{left:8px}
.site-header{border-bottom:1px solid var(--line);background:rgba(7,8,9,.96);position:sticky;top:0;z-index:10}
.nav{max-width:var(--max);margin:auto;min-height:70px;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;font-weight:690;letter-spacing:-.02em;white-space:nowrap}
.brand img{width:34px;height:34px;border-radius:9px}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:24px;font-size:.9rem;color:var(--muted)}
.nav-links a{text-decoration:none}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--text)}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:999px;text-decoration:none;font-weight:660;font-size:.92rem}
.button-primary{background:var(--text);color:#090a0c}
.button-primary:hover{background:var(--cyan)}
.button-secondary{border:1px solid var(--line);color:var(--text)}
.button-secondary:hover{border-color:var(--violet);color:var(--violet)}
.page-hero{max-width:var(--max);margin:auto;padding:96px 24px 76px;display:grid;grid-template-columns:minmax(0,1.3fr) minmax(260px,.7fr);gap:72px;align-items:end}
.kicker{margin:0 0 18px;color:var(--violet);font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
h1,h2,h3{line-height:1.12;text-wrap:balance}
h1{font-size:clamp(2.8rem,7vw,5.2rem);letter-spacing:-.038em;margin:0;max-width:900px}
.hero-copy{margin:25px 0 0;max-width:720px;color:#c5c5ce;font-size:clamp(1.05rem,2vw,1.28rem);line-height:1.62;text-wrap:pretty}
.hero-note{padding:24px 0 2px;border-top:1px solid var(--line);color:var(--muted);font-size:.92rem}
.hero-note strong{display:block;color:var(--text);font-size:1rem;margin-bottom:8px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.proof-strip{border-block:1px solid var(--line);background:var(--surface)}
.proof-strip-inner{max-width:var(--max);margin:auto;padding:20px 24px;display:flex;flex-wrap:wrap;gap:14px 32px;color:var(--muted);font-size:.88rem}
.proof-strip strong{color:var(--text)}
.content-wrap{max-width:var(--max);margin:auto;padding:74px 24px 100px}
.article-grid{display:grid;grid-template-columns:230px minmax(0,760px);gap:76px;justify-content:center}
.toc{position:sticky;top:100px;align-self:start}
.toc strong{display:block;margin-bottom:12px;font-size:.84rem}
.toc a{display:block;padding:6px 0;color:var(--muted);font-size:.86rem;text-decoration:none}
.toc a:hover,.toc a:focus-visible{color:var(--violet)}
.prose{min-width:0}
.prose h2{font-size:clamp(1.8rem,4vw,2.6rem);letter-spacing:-.025em;margin:70px 0 18px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.25rem;margin:36px 0 12px}
.prose p,.prose li{color:#c4c5ce;text-wrap:pretty}
.prose ul,.prose ol{padding-left:1.2rem}
.prose li{margin:.55rem 0}
.prose strong{color:var(--text)}
.definition{margin:32px 0;padding:22px 24px;background:var(--surface);border:1px solid var(--line);border-radius:12px;color:#d4d4db}
.definition strong{display:block;margin-bottom:6px;color:var(--cyan)}
.principles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin:34px 0;border-top:1px solid var(--line)}
.principle{padding:24px 26px 24px 0;border-bottom:1px solid var(--line)}
.principle:nth-child(even){padding-left:26px;border-left:1px solid var(--line)}
.principle h3{margin:0 0 8px;font-size:1.06rem}
.principle p{margin:0;font-size:.93rem}
.related{margin-top:76px;padding-top:30px;border-top:1px solid var(--line)}
.related h2{margin:0 0 22px;font-size:1.45rem}
.link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.link-list a{display:block;padding:17px 18px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:#d7d7de}
.link-list a:hover{border-color:var(--violet);color:var(--text)}
.hub-intro{max-width:760px;margin-bottom:52px}
.hub-list{border-top:1px solid var(--line)}
.hub-item{display:grid;grid-template-columns:180px 1fr auto;gap:28px;align-items:start;padding:30px 0;border-bottom:1px solid var(--line);text-decoration:none}
.hub-item span{font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;color:var(--violet)}
.hub-item h2{margin:0 0 8px;font-size:1.45rem;letter-spacing:-.02em}
.hub-item p{margin:0;color:var(--muted);max-width:650px}
.hub-item b{color:var(--text);font-weight:500}
.hub-item:hover h2{color:var(--cyan)}
.cta{max-width:var(--max);margin:0 auto 100px;padding:52px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.cta h2{margin:0;font-size:clamp(2rem,5vw,3.4rem);letter-spacing:-.035em}
.cta p{max-width:680px;color:var(--muted);margin:16px 0 26px}
.site-footer{border-top:1px solid var(--line)}
.footer-inner{max-width:var(--max);margin:auto;padding:42px 24px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;color:var(--muted);font-size:.86rem}
.footer-inner strong{color:var(--text)}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{text-decoration:none}
.footer-links a:hover{color:var(--text)}
.legal-note{max-width:var(--max);margin:auto;padding:0 24px 36px;color:var(--quiet);font-size:.76rem}
@media (max-width:840px){
  .nav{align-items:flex-start}
  .nav-links{gap:14px;flex-wrap:wrap}
  .nav-links .nav-optional{display:none}
  .page-hero{grid-template-columns:1fr;gap:36px;padding-top:70px}
  .article-grid{grid-template-columns:1fr}
  .toc{position:static;padding-bottom:24px;border-bottom:1px solid var(--line)}
  .hub-item{grid-template-columns:1fr;gap:8px}
  .hub-item b{display:none}
}
@media (max-width:620px){
  body{font-size:16px}
  .nav{padding-inline:18px;min-height:64px}
  .nav-links a:not(.button){display:none}
  .page-hero,.content-wrap{padding-inline:20px}
  .page-hero{padding-top:56px;padding-bottom:54px}
  h1{font-size:clamp(2.45rem,13vw,3.5rem)}
  .principles,.link-list{grid-template-columns:1fr}
  .principle:nth-child(even){padding-left:0;border-left:0}
  .cta{margin:0 20px 70px;padding:34px 24px}
  .footer-inner{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}