body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b1220;
  color: white;
}

.header {
  text-align: center;
  padding: 40px;
  background: #0f1b33;
}

.nav {
  display: flex;
  justify-content: center;
  background: #111c33;
}

.nav a {
  color: white;
  padding: 15px 20px;
  text-decoration: none;
}

.nav a:hover {
  background: #1d2f55;
}

.hero {
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(to right, #0f1b33, #122a4d);
}

.products-preview {
  padding: 40px;
  text-align: center;
}

footer {
  text-align: center;
  padding: 20px;
  background: #0f1b33;
  margin-top: 50px;
}