body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f8f9fa;
}
.header {
  background: #004b6b;
  color: white;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
}
.hero-img {
  width: 100%;
  height: auto;
}
section {
  padding: 20px;
  text-align: center;
}
.footer {
  background: #003548;
  color: white;
  text-align: center;
  padding: 15px 0;
}