body {
  background-color: #f0f0f0;
  font-family: 'Open Sans', sans-serif;
  margin: 0;
}

header {
  background-color: #ffffff;
  padding: 20px;
  text-align: center;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

nav li {
  display: inline-block;
  margin: 10px;
}

nav li a {
  display: block;
  padding: 10px 20px;
  background-color: #336699;
  color: #ffffff;
  text-decoration: none;
  border-radius: 5px;
}

main {
  padding: 20px;
}

main h2 {
  color: #336699;
}

footer {
  background-color: #333; /* Example color */
  color: #fff;
  text-align: center;
  padding: 10px;
}