body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}
header, footer {
  background: #111;
  color: #fff;
  padding: 1rem;
  text-align: center;
}
main {
  padding: 2rem;
}
h1 {
  margin: 0;
}
a {
  color: #007acc;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
article {
  margin-bottom: 2rem;
}