body {
  font-family: Arial, sans-serif;
  background-color: #fdfdfd;
  margin: 0;
  padding: 0;
  color: #333;
}
header {
  background-color: #003366;
  color: white;
  padding: 1.5em 1em;
  text-align: center;
}
nav {
  background-color: #e6e6e6;
  padding: 1em;
  text-align: center;
}
nav a {
  margin: 0 1em;
  text-decoration: none;
  color: #003366;
  font-weight: bold;
}
main {
  max-width: 800px;
  margin: 2em auto;
  padding: 1em;
}
footer {
  text-align: center;
  padding: 1em;
  background-color: #f2f2f2;
  color: #777;
  font-size: 0.9em;
}
.centered {
  text-align: center;
  padding-top: 50px;
}
a {
  color: #003366;
}