body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0 1em;
  background: #f5f5f5;
  color: #333;
}

header {
  background: #007acc;
  color: white;
  padding: 1em 1em;
}

header h1 {
  margin: 0 0 0.5em 0;
}

nav a {
  color: white;
  margin-right: 1em;
  text-decoration: none;
  font-weight: bold;
}

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

main {
  background: white;
  padding: 1em;
  margin: 1em 0;
  border-radius: 5px;
}

footer {
  text-align: center;
  font-size: 0.8em;
  color: #666;
  margin: 2em 0;
}