body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f8f9fa;
  color: #333;
}

header, footer {
  background: #004080;
  color: white;
  padding: 1rem;
  text-align: center;
}
nav a {
  color: #fff;
  margin: 0 10px;
  text-decoration: none;
}
main {
  padding: 2rem;
}
.gallery img {
  margin: 10px;
  border-radius: 10px;
}