body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  background-color: #666666;
  color: #333;
}

header {
  background: #004466;
  color: #ccc;
  padding: 20px 0;
  text-align: center;
}

nav {
  background: #0077aa;
  padding: 10px;
  text-align: center;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav ul li {
  display: inline;
  margin: 0 10px;
}

nav a {
  color: #ddd;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 20px;
  max-width: 900px;
  margin: auto;
  background: #cccccc;
}

h2 {
  color: #004466;
  border-bottom: 1px solid #ccc;
  padding-bottom: 5px;
}

footer {
  text-align: center;
  padding: 10px;
  background: #ddd;
  background-color: #666666;
}

