body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #ffffff;
  color: #333;
}

header {
  background: #0f62fe;
  color: white;
  padding: 1em;
  text-align: center;
}

nav a {
  margin: 0 1em;
  color: white;
  text-decoration: none;
}

main {
  padding: 2em;
}

footer {
  background: #f1f1f1;
  text-align: center;
  padding: 1em;
  margin-top: 2em;
}