body {
  font-family: Arial, sans-serif;
  background-color: #fff;
  color: #333;
  margin: 0;
  padding: 0;
}
header {
  background-color: #00A8E8;
  color: #FFD700;
  padding: 20px;
  text-align: center;
}
nav {
  background-color: #FFD700;
  padding: 10px;
  text-align: center;
}
nav a {
  color: #00A8E8;
  text-decoration: none;
  font-weight: bold;
  margin: 0 15px;
}
main {
  padding: 20px;
}
footer {
  background-color: #f2f2f2;
  color: #777;
  text-align: center;
  padding: 15px;
  font-size: 0.9em;
}