body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
  background-color: #f4f4f4;
}
header {
  background: #004c99;
  color: white;
  padding: 2rem;
}
.cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
}
.card {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  text-decoration: none;
  color: #004c99;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  font-size: 1.2rem;
}