body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f4f6f9;
}

.header {
  background: #111;
  color: white;
  padding: 20px;
  text-align: center;
}

.header nav a {
  color: #ddd;
  margin: 0 10px;
  text-decoration: none;
}

.hero {
  padding: 60px;
  text-align: center;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  color: white;
}

.card {
  background: white;
  margin: 20px auto;
  padding: 20px;
  max-width: 600px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

footer {
  text-align: center;
  padding: 20px;
  background: #111;
  color: white;
}