:root {
  --bg:#0f1318; --fg:#e6e6e6; --muted:#9aa0a6;
  --accent:#6fb3d2; --card:#141922;
}
* { box-sizing:border-box }
html, body { margin:0; padding:0 }
body {
  background:var(--bg);
  color:var(--fg);
  font-family:Arial,sans-serif;
  line-height:1.6;
  min-height:100vh;
}
header {
  padding:20px;
  border-bottom:1px solid #2a2f36;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
h1 span { color:var(--accent) }
nav a {
  margin-right:16px;
  color:var(--fg);
  text-decoration:none;
}
nav a:hover { color:var(--accent) }
main {
  padding:40px 20px;
  max-width:900px;
  margin:auto;
}
section { margin-bottom:40px }
.card {
  background:var(--card);
  padding:24px;
  border-radius:14px;
}
.cta {
  border:1px solid #2a2f36;
  padding:28px;
  border-radius:16px;
}
a.button {
  display:inline-block;
  margin-top:18px;
  padding:14px 28px;
  background:var(--accent);
  color:#111;
  text-decoration:none;
  border-radius:30px;
  font-weight:bold;
}
footer {
  text-align:center;
  padding:20px;
  font-size:.85rem;
  color:var(--muted);
}
@media(max-width:768px){
  header{flex-direction:column; gap:12px}
}