body {
  font-family: sans-serif;
  margin: 0;
  background-color: #ffffff;
  color: #003366;
}
header {
  background-color: #007bff;
  color: white;
  padding: 1rem;
}
nav ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  background-color: #0056b3;
}
nav ul li {
  margin: 0.5rem;
}
nav ul li a {
  color: white;
  text-decoration: none;
  padding: 0.5rem;
}
.hero {
  background-color: #d4f5e6;
  padding: 2rem;
  text-align: center;
}
.tiles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  padding: 2rem;
}
.tile {
  background-color: #e0f7fa;
  border: 1px solid #b2ebf2;
  padding: 1rem;
  text-align: center;
  width: 150px;
}
footer {
  background-color: #007bff;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}