body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f9fb;
  color: #333;
}

header {
  background: #2c3e50;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav a {
  color: white;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background: #ecf0f1;
  font-size: 0.9rem;
  color: #555;
}