body {
  background-color: green;
  color: white;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header {
  padding: 40px;
  text-align: center;
}

nav {
  background-color: darkgreen;
  padding: 30px;
  text-align: center;
}

nav a {
  color: white;
  margin: 0 30px;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding: 20px;
}

p {
 text-align: center;
}

h2 { text-align: : center;
}