body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #fff;
  color: #111;
}
header {
  background: #0f172a;
  color: white;
  padding: 2rem;
  text-align: center;
}
.cta {
  background: #10b981;
  color: white;
  padding: 1rem 2rem;
  font-size: 1rem;
  border: none;
  cursor: pointer;
}
section {
  padding: 2rem;
  border-bottom: 1px solid #ddd;
}
.terminal {
  background: black;
  color: #0f0;
  padding: 1rem;
  font-family: monospace;
}
footer {
  text-align: center;
  padding: 1rem;
  background: #eee;
  font-size: 0.9rem;
}