body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b0b1a;
  color: white;
}

.container {
  display: flex;
  justify-content: space-between;
  padding: 20px;
}

nav a {
  margin: 0 10px;
  color: #00ffff;
  text-decoration: none;
}

.hero {
  text-align: center;
  padding: 100px 20px;
}

.section {
  padding: 60px 20px;
  text-align: center;
}

.dark {
  background: #111133;
}

.grid {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.card {
  background: #1a1a40;
  padding: 20px;
  border-radius: 10px;
  width: 200px;
}

footer {
  text-align: center;
  padding: 20px;
}