body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0b0f1a;
  color: #ffffff;
}

header {
  text-align: center;
  padding: 40px;
  background: linear-gradient(135deg, #1e3a8a, #0ea5e9);
}

nav {
  display: flex;
  justify-content: center;
  background: #111827;
  padding: 10px;
}

nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
}

section {
  padding: 40px;
  max-width: 900px;
  margin: auto;
}

#hero {
  text-align: center;
}

.card {
  background: #1f2937;
  padding: 20px;
  margin: 20px 0;
  border-radius: 8px;
}

footer {
  text-align: center;
  padding: 20px;
  background: #111827;
}