:root{
  --bg:#0b0f16;
  --card:#111827;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --line:#243042;
  --accent:#4cc9f0;
}

*{box-sizing:border-box}

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 20% 10%, rgba(76,201,240,.12), transparent 60%),
    radial-gradient(900px 500px at 80% 0%, rgba(99,102,241,.12), transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.55;
}

a{
  color:inherit;
  text-decoration:none;
}
a:hover{
  color:var(--accent);
}

.container{
  max-width:1060px;
  margin:0 auto;
  padding:0 18px;
}

/* ---------- Header / Navigation ---------- */

header{
  position:sticky;
  top:0;
  z-index:10;
  background: rgba(11,15,22,.78);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--line);
}

.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 0;
}

.brand{
  display:flex;
  gap:10px;
  align-items:center