:root{
  --bg:#0b1526;
  --fg:#e5e7eb;
  --muted:#9ca3af;
  --link:#60a5fa;
  --card:#0f203b;
  --accent:#2563eb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--fg);
  line-height:1.6;
}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.wrapper{max-width:980px;margin:0 auto;padding:24px}
.nav{
  display:flex;gap:16px;align-items:center;justify-content:space-between;margin:0 0 16px 0
}
.brand{font-weight:800;letter-spacing:.3px}
.menu a{margin:0 8px;color:#cbd5e1}
.menu a.active{color:#fff;font-weight:700}
.card{background:var(--card);border-radius:16px;padding:24px;box-shadow:0 8px 24px rgba(0,0,0,.25);}
h1{font-size:28px;margin:6px 0 12px 0}
h2{font-size:20px;margin:24px 0 10px 0}
h3{font-size:16px;margin:20px 0 8px 0}
footer{margin-top:40px;color:var(--muted);font-size:14px}
.btn{
  display:inline-block;background:var(--accent);color:#fff;
  padding:12px 16px;border-radius:10px;font-weight:700
}
.badge{display:inline-block;background:#102848;border:1px solid #264a8f;color:#c7d2fe;padding:4px 8px;border-radius:999px;font-size:12px}
.kv{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:700px){.kv{grid-template-columns:1fr}}
.code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#0b1a33;padding:2px 6px;border-radius:6px}