:root{color-scheme:dark;--bg-0:#070b16;--bg-1:#0b1124;--text:#e8eef9;--muted:#97a3bb;--faint:#5f6b85;
  --line:rgba(255,255,255,.09);--accent:#5b9dff;--grad:linear-gradient(135deg,#6366f1,#38bdf8 55%,#22d3ee)}
*{box-sizing:border-box}
body{margin:0;color:var(--text);font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  font-size:16px;line-height:1.7;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;min-height:100vh;
  background:radial-gradient(1000px 500px at 85% -10%,rgba(56,189,248,.08),transparent 60%),
    radial-gradient(800px 400px at -10% 110%,rgba(99,102,241,.1),transparent 60%),
    linear-gradient(180deg,var(--bg-0),var(--bg-1))}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.bar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  padding:.85rem 1.25rem;border-bottom:1px solid var(--line);background:rgba(7,11,22,.72);backdrop-filter:blur(16px)}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:800;font-size:1.15rem;letter-spacing:-.03em;color:var(--text)}
.brand .logo{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--grad);
  color:#04111f;font-weight:800;font-size:.78rem;letter-spacing:-.04em}
.bar nav{display:flex;gap:1.1rem;font-size:.9rem;font-weight:600}
.bar nav a{color:var(--muted)}.bar nav a:hover{color:var(--text);text-decoration:none}
main{max-width:740px;margin:0 auto;padding:2.5rem 1.25rem 4rem}
.crumb{font-size:.8rem;color:var(--faint);margin-bottom:1rem}.crumb a{color:var(--muted)}
h1{font-size:2.1rem;font-weight:800;letter-spacing:-.03em;margin:.2rem 0 .6rem;line-height:1.2}
.lede{font-size:1.12rem;color:var(--muted);margin:0 0 1.6rem}
h2{font-size:1.35rem;font-weight:700;margin:2.2rem 0 .6rem;letter-spacing:-.02em}
h3{font-size:1.05rem;font-weight:700;margin:1.4rem 0 .35rem}
p{margin:.7rem 0}ul,ol{padding-left:1.25rem}li{margin:.4rem 0}strong{color:#fff}
.cta{display:inline-flex;align-items:center;gap:.5rem;margin:1.6rem 0;padding:.85rem 1.5rem;border-radius:12px;
  background:var(--grad);color:#04121f;font-weight:700;box-shadow:0 12px 28px -12px rgba(56,189,248,.7)}
.cta:hover{text-decoration:none;filter:brightness(1.05)}
.card{background:rgba(255,255,255,.045);border:1px solid var(--line);border-radius:14px;padding:1rem 1.25rem;margin:1.3rem 0;color:var(--muted)}
.card strong{color:var(--text)}
details{border-bottom:1px solid var(--line)}
details summary{cursor:pointer;list-style:none;padding:.8rem 0;font-weight:600;display:flex;justify-content:space-between;align-items:center}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--faint);font-weight:400;font-size:1.1rem}
details[open] summary::after{content:"\2212"}
details p{margin:0 0 .9rem;color:var(--muted)}
.related{margin-top:2.6rem;border-top:1px solid var(--line);padding-top:1.2rem}
.related a{display:block;padding:.5rem 0;font-weight:600}
.foot{color:var(--faint);font-size:.8rem;margin-top:2.6rem;border-top:1px solid var(--line);padding-top:1.2rem}
@media(max-width:560px){h1{font-size:1.7rem}main{padding:1.6rem 1rem 3rem}.bar nav{gap:.7rem}}