:root{
  --bg:#071320;
  --surface:#0d1b2a;
  --surface-2:#11243a;
  --surface-3:#0f2135;
  --text:#e8f0f8;
  --muted:#a3b7ca;
  --line:rgba(255,255,255,.08);
  --brand:#5fb4ff;
  --brand-2:#7de5d1;
  --shadow:0 24px 80px rgba(0,0,0,.28);
  --radius:24px;
  --radius-sm:16px;
  --max:1240px;
}
*{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(--text);
  background:
    radial-gradient(circle at top right, rgba(95,180,255,.12), transparent 24%),
    radial-gradient(circle at left 20%, rgba(125,229,209,.08), transparent 20%),
    linear-gradient(180deg,#071320 0%,#091624 100%);
  line-height:1.65;
}
a{color:var(--text);text-decoration:none}
.container{width:min(calc(100% - 40px),var(--max));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:40;
  backdrop-filter:blur(14px);
  background:rgba(7,19,32,.72);
  border-bottom:1px solid var(--line);
}
.nav-shell{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:16px 0}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#06111d;font-weight:800;letter-spacing:.04em;
  box-shadow:var(--shadow);
}
.brand-text{display:flex;flex-direction:column}
.brand-text strong{font-size:15px}
.brand-text small{font-size:12px;color:var(--muted)}
.main-nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a{
  padding:10px 14px;border:1px solid transparent;border-radius:999px;
  color:var(--muted);font-size:14px
}
.main-nav a:hover,.main-nav a.active{border-color:var(--line);background:rgba(255,255,255,.04);color:var(--text)}
.hero{padding:72px 0 36px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;align-items:start}
.breadcrumbs{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0 0 20px;color:var(--muted);font-size:13px}
.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:10px;color:rgba(255,255,255,.18)}
.breadcrumbs a{color:var(--muted)}
.eyebrow{display:inline-block;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.03);font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:#cfe7ff}
h1{font-size:clamp(2.25rem,4vw,4.3rem);line-height:1.04;letter-spacing:-.03em;margin:16px 0 18px;max-width:13ch}
.lead{font-size:1.12rem;color:#d7e6f3;max-width:68ch;margin:0 0 12px}
.sublead{font-size:1rem;color:var(--muted);max-width:66ch;margin:0}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.btn{padding:14px 18px;border-radius:16px;font-weight:700;border:1px solid var(--line)}
.btn-primary{background:linear-gradient(135deg,var(--brand),#7c9fff);color:#04111d}
.btn-secondary{background:rgba(255,255,255,.03)}
.hero-card,.content-card,.side-card{
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.025));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.hero-card{padding:24px}
.hero-card h2{margin:0 0 10px;font-size:1.1rem}
.hero-card p{margin:0 0 16px;color:var(--muted)}
.check-list,.insight-list,.mini-list{margin:0;padding-left:20px}
.check-list li,.insight-list li,.mini-list li{margin:0 0 12px;color:#d9e6f2}
.link-strip{padding:0 0 20px}
.link-strip .container{display:flex;gap:12px;flex-wrap:wrap}
.link-strip a{
  padding:10px 14px;border-radius:999px;border:1px solid var(--line);
  background:rgba(255,255,255,.03);font-size:14px;color:#dceaf6
}
.section{padding:22px 0 84px}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px}
.content{display:grid;gap:20px}
.content-card{padding:28px}
.content-card h2{margin:0 0 12px;font-size:1.5rem;letter-spacing:-.02em}
.content-card h3{margin:0 0 8px;font-size:1rem}
.content-card p:last-child{margin-bottom:0}
.content-card p{margin:0 0 14px;color:#d7e6f3}
.matrix{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.matrix-item{
  padding:18px;border-radius:18px;background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.06)
}
.matrix-item p{margin:0;color:var(--muted)}
.sidebar{display:grid;gap:20px;align-content:start}
.side-card{padding:22px}
.side-card h3{margin:0 0 12px}
.related-grid{display:grid;gap:10px}
.related-card{
  display:flex;flex-direction:column;gap:4px;padding:14px;border-radius:16px;
  border:1px solid rgba(255,255,255,.06);background:rgba(255,255,255,.03)
}
.related-card span{font-weight:700}
.related-card small{color:var(--muted)}
.faq-item{border-top:1px solid rgba(255,255,255,.08);padding:16px 0}
.faq-item:first-of-type{border-top:0;padding-top:0}
.faq-item summary{cursor:pointer;font-weight:700;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item div{padding-top:12px}
.site-footer{border-top:1px solid var(--line);padding:36px 0 60px;background:rgba(0,0,0,.12)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--muted)}
.footer-col a:hover{color:var(--text)}
.footer-brand p{color:var(--muted);max-width:46ch}
@media (max-width:1040px){
  .hero-grid,.article-grid,.footer-grid{grid-template-columns:1fr}
  .main-nav{display:none}
}
@media (max-width:720px){
  .container{width:min(calc(100% - 24px),var(--max))}
  .hero{padding-top:48px}
  h1{max-width:none}
  .matrix{grid-template-columns:1fr}
  .content-card,.hero-card,.side-card{padding:22px}
}