:root{
  --paper:#f7f6f2; --card:#ffffff; --ink:#14171a; --muted:#616a72; --line:#e2ded4;
  --blue:#2563eb; --blue-soft:#eaf1ff; --danger:#c2410c; --radius:16px; --ease:cubic-bezier(.2,.8,.2,1);
  --shadow:0 1px 2px rgba(20,23,26,.04),0 12px 30px rgba(20,23,26,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);line-height:1.68;
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:inherit}
.skip{position:absolute;left:-9999px}
.skip:focus{left:1rem;top:1rem;z-index:40;background:var(--ink);color:#fff;padding:.6rem 1rem;border-radius:10px}
.shell{width:min(1080px,calc(100% - 2.6rem));margin:auto}
.nav{position:sticky;top:0;z-index:20;background:rgba(247,246,242,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:68px}
.brand{display:flex;align-items:center;gap:.65rem;text-decoration:none;font-weight:800;letter-spacing:-.025em;font-size:1.14rem}
.mark{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;background:var(--blue);color:#fff;font:800 .74rem/1 ui-monospace,monospace}
.links{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}
.links a{text-decoration:none;font-size:.89rem;font-weight:600;color:var(--muted);transition:color .18s var(--ease)}
.links a:hover,.links a[aria-current=page]{color:var(--ink)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;background:var(--blue);color:#fff!important;
  padding:.6rem 1rem;border-radius:999px;text-decoration:none;font-weight:700;font-size:.88rem;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(37,99,235,.28)}
.ghost{display:inline-flex;align-items:center;padding:.58rem 1rem;border-radius:999px;border:1px solid var(--line);background:#fff;text-decoration:none;font-weight:700;font-size:.88rem;transition:border-color .2s var(--ease),transform .2s var(--ease)}
.ghost:hover{border-color:var(--blue);transform:translateY(-2px)}
.page-hero{padding:4.1rem 0 1.8rem}
.crumbs{font:600 .72rem/1.4 ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--blue)}
.eyebrow{font:700 .72rem/1.4 ui-monospace,monospace;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);margin-top:1rem}
h1{font-size:clamp(2.2rem,5vw,3.7rem);line-height:1.05;letter-spacing:-.04em;margin:.5rem 0 1rem;max-width:22ch;font-weight:800}
h2{font-size:clamp(1.4rem,2.4vw,1.95rem);letter-spacing:-.028em;margin:2.4rem 0 .7rem;font-weight:800}
h3{font-size:1.12rem;letter-spacing:-.015em;margin:.15rem 0 .45rem;font-weight:700}
.lede{max-width:63ch;color:var(--muted);font-size:1.13rem}
.hero-cta{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.5rem}
.section{padding:2rem 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.3rem}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.3rem;box-shadow:var(--shadow);
  transition:transform .22s var(--ease),border-color .22s var(--ease)}
.card:hover{transform:translateY(-4px);border-color:#c9d7f5}
.card p{color:var(--muted);margin:.3rem 0 0}
.tag{display:inline-block;font:700 .67rem/1 ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--blue);background:var(--blue-soft);border-radius:999px;padding:.32rem .6rem}
.kpi{font:800 2.2rem/1 ui-monospace,monospace;color:var(--blue);letter-spacing:-.03em}
.steps{counter-reset:s;display:grid;gap:.85rem;margin-top:1.2rem}
.step{display:grid;grid-template-columns:50px 1fr;gap:1rem;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.1rem;box-shadow:var(--shadow)}
.step::before{counter-increment:s;content:counter(s,decimal-leading-zero);font:800 1rem/1 ui-monospace,monospace;color:var(--blue)}
.step p{color:var(--muted);margin:.22rem 0 0}
.prose{max-width:73ch}
.prose p,.prose li{color:var(--muted)}
.prose strong{color:var(--ink)}
.prose ul{padding-left:1.25rem}
.prose li{margin:.38rem 0}
.callout{border-radius:13px;padding:1.05rem 1.2rem;margin:1.3rem 0;background:var(--blue-soft);border-left:4px solid var(--blue)}
.warn{background:#fff2ea;border-left-color:var(--danger)}
.warn strong{color:var(--danger)}
.two-col{display:grid;grid-template-columns:1.45fr .68fr;gap:2rem;align-items:start;margin-top:1rem}
.toc{position:sticky;top:92px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.05rem;box-shadow:var(--shadow)}
.toc a{display:block;padding:.38rem 0;color:var(--muted);text-decoration:none;font-size:.89rem}
.toc a:hover{color:var(--blue)}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:.9rem 1.1rem;margin:.65rem 0;box-shadow:var(--shadow)}
.faq summary{cursor:pointer;font-weight:700}
.faq p{color:var(--muted);margin:.55rem 0 0}
.aff{color:var(--blue);font-weight:700}
.footer{margin-top:3.2rem;border-top:1px solid var(--line);background:#fff;padding:2.4rem 0 1.3rem}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:1.8rem}
.foot-grid a{display:block;margin:.4rem 0;color:var(--muted);text-decoration:none;font-size:.89rem}
.foot-grid a:hover{color:var(--blue)}
.foot-grid p{color:var(--muted);max-width:44ch}
.fine{border-top:1px solid var(--line);margin-top:1.8rem;padding-top:1rem;font-size:.81rem;color:var(--muted)}
@media (max-width:820px){
  .links a:not(.btn){display:none}
  .grid,.grid.two,.two-col,.foot-grid{grid-template-columns:1fr}
  .two-col{gap:1.3rem}
  .toc{position:static}
  .page-hero{padding:2.8rem 0 1.3rem}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;scroll-behavior:auto}
  .card:hover,.btn:hover,.ghost:hover{transform:none}
}