:root{
  --bg:#060d1a;
  --bg2:#0a1526;
  --panel:rgba(100,180,255,.06);
  --panel2:rgba(255,255,255,.035);
  --line:rgba(141,212,255,.16);
  --line2:rgba(141,212,255,.28);
  --text:#e8f4ff;
  --muted:#8bb3d5;
  --accent:#4da6ff;
  --accent2:#38e8c8;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(circle at 18% 8%,rgba(77,166,255,.12),transparent 32%),
    radial-gradient(circle at 82% 28%,rgba(56,232,200,.08),transparent 28%),
    linear-gradient(180deg,var(--bg),#081426 58%,var(--bg));
  color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  line-height:1.65;
}
a{color:inherit;text-decoration:none}
.shell{width:min(var(--max),calc(100% - 40px));margin:0 auto}
.nav{
  position:sticky;top:0;z-index:20;
  background:rgba(6,13,26,.88);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(18px);
}
.nav-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{font-family:"Space Grotesk",sans-serif;font-weight:800;font-size:1.2rem;display:flex;align-items:center;gap:10px}
.brand-mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;border:1px solid var(--line2);background:linear-gradient(135deg,rgba(77,166,255,.14),rgba(56,232,200,.12))}
.nav-links{display:flex;align-items:center;gap:18px;color:var(--muted);font-weight:700;font-size:.9rem}
.nav-links a:hover{color:var(--text)}
.nav-cta{border-radius:999px;padding:.58rem 1rem;background:linear-gradient(135deg,var(--accent),var(--accent2));color:white}
.hero{padding:86px 0 54px;border-bottom:1px solid var(--line)}
.eyebrow{display:inline-flex;gap:8px;align-items:center;color:#9deee2;border:1px solid rgba(56,232,200,.26);background:rgba(56,232,200,.08);border-radius:999px;padding:7px 12px;font-size:.74rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
h1,h2,h3{font-family:"Space Grotesk",sans-serif;letter-spacing:-.025em;line-height:1.1}
h1{font-size:clamp(2.5rem,5vw,4.7rem);max-width:850px;margin:18px 0 16px}
.lead{max-width:720px;color:var(--muted);font-size:1.08rem;margin:0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;font-weight:800;border:1px solid var(--line2)}
.btn.primary{border-color:transparent;background:linear-gradient(135deg,var(--accent),var(--accent2));color:white;box-shadow:0 18px 42px rgba(77,166,255,.22)}
.section{padding:64px 0}
.section-head{max-width:760px;margin-bottom:26px}
.section-head h2{font-size:clamp(1.8rem,3vw,2.7rem);margin:0 0 10px}
.section-head p{margin:0;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.card{border:1px solid var(--line);background:linear-gradient(180deg,var(--panel),var(--panel2));border-radius:18px;padding:22px;min-height:230px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 18px 48px rgba(0,0,0,.18)}
.card:hover{border-color:var(--line2);transform:translateY(-2px);transition:160ms ease}
.meta{display:flex;gap:8px;flex-wrap:wrap;color:#9deee2;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.05em}
.card h2{font-size:1.55rem;margin:14px 0 10px}
.card p{color:var(--muted);margin:0}
.read{margin-top:20px;color:#dffbff;font-weight:850}
.article{display:grid;grid-template-columns:minmax(0,760px) 280px;gap:42px;align-items:start}
.content{border:1px solid var(--line);background:rgba(255,255,255,.035);border-radius:22px;padding:34px}
.content h2{font-size:1.8rem;margin:34px 0 12px}
.content h2:first-child{margin-top:0}
.content h3{font-size:1.25rem;margin:24px 0 8px}
.content p,.content li{color:#c5daef}
.content p{margin:0 0 16px}
.content ul,.content ol{padding-left:22px}
.content strong{color:var(--text)}
.toc{position:sticky;top:92px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.035);padding:18px}
.toc strong{display:block;margin-bottom:10px}
.toc a{display:block;color:var(--muted);padding:7px 0;border-top:1px solid rgba(141,212,255,.08);font-size:.92rem}
.note{border-left:3px solid var(--accent2);background:rgba(56,232,200,.08);padding:14px 16px;border-radius:12px;margin:22px 0;color:#dffbff}
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.mini{border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.035);padding:16px;color:var(--muted);font-weight:750}
.mini strong{display:block;color:var(--text);margin-bottom:6px}
footer{border-top:1px solid var(--line);padding:32px 0 54px;color:var(--muted)}
@media(max-width:860px){
  .nav-links{gap:10px;font-size:.82rem;flex-wrap:wrap;justify-content:flex-end}
  .grid,.article,.related{grid-template-columns:1fr}
  .toc{position:static}
  .content{padding:24px}
}
@media(max-width:560px){
  .shell{width:min(100% - 24px,var(--max))}
  .nav-inner{align-items:flex-start;padding:14px 0;min-height:auto}
  .nav-links{display:none}
  .hero{padding:54px 0 38px}
}