:root{
  --bg:#0b1020;
  --card:#121936;
  --muted:#97a2b3;
  --text:#e8ecf3;
  --brand:#16a34a; /* green */
  --brand-2:#22c55e;
  --link:#60a5fa;
  --maxw:1120px;
  --radius:18px;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:20px}
.header{position:sticky;top:0;z-index:50;background:rgba(11,16,32,.75);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}
.header .inner{display:flex;gap:16px;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;gap:10px;align-items:center}
.brand .logo{width:28px;height:28px}
.brand .title{font-weight:800;letter-spacing:.3px}
.nav{display:flex;gap:14px;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:999px;background:#0f1630;border:1px solid rgba(255,255,255,.08)}
.nav a:hover{background:#141c3f}
.hero{padding:32px 0 10px}
h1{font-size:clamp(28px,3.4vw,42px);line-height:1.15;margin:0 0 10px}
.lead{font-size:clamp(16px,2vw,18px);color:var(--muted);margin:0 0 16px}
.meta{color:var(--muted);font-size:14px}
.card{background:var(--card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin:16px 0}
.card h2{margin:0 0 8px;font-size:clamp(20px,2.6vw,28px)}
.card h3{margin:24px 0 8px;font-size:clamp(18px,2.2vw,22px)}
.grid{display:grid;gap:16px}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:900px){.grid.cols-2{grid-template-columns:1fr}}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 0}
.toc a{font-size:14px;padding:6px 10px;border:1px dashed rgba(255,255,255,.15);border-radius:999px}
.cta{display:block;width:100%;text-align:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:white;font-weight:800;padding:14px 18px;border:none;border-radius:12px;box-shadow:0 8px 24px rgba(22,163,74,.3);margin:14px 0 4px}
.cta:hover{filter:brightness(1.05)}
.footer{color:var(--muted);padding:26px 0 40px}
.badge{font-size:12px;color:var(--muted);border:1px solid rgba(255,255,255,.15);padding:2px 8px;border-radius:999px}
kbd{background:#0d1430;border:1px solid rgba(255,255,255,.14);padding:1px 6px;border-radius:6px;font-size:12px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid rgba(255,255,255,.08);padding:10px 8px;text-align:left}
.note{font-size:14px;color:var(--muted)}
.alert{background:#1a243d;border-left:4px solid var(--brand);padding:14px;border-radius:12px}
.breadcrumbs{font-size:14px;color:var(--muted);margin:8px 0 0}
.small{font-size:13px;color:var(--muted)}

/* === Nav tidy (mobile) === */
.header .inner{flex-wrap:wrap}
.nav{gap:10px;overflow-x:auto;white-space:nowrap;scrollbar-width:none;-ms-overflow-style:none}
.nav::-webkit-scrollbar{display:none}
.nav a{font-size:14px;padding:6px 10px}
@media (max-width:640px){
  .brand .title{font-size:16px}
  .nav{margin-top:6px}
}