html, body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

header {
  background-color: #222;
  text-align: center;
  padding: 1rem;
}

header h1 {
  color: white;
  margin: 0;
}

article {
  margin: 2rem;
}

article img {
  width: 100%;
  max-width: 800px;
  height: auto;
  display: block;
  margin: 1rem auto;
}

article h2 {
  color: #444;
  font-size: 1.8rem;
  margin: 1rem 0;
}

article p {
  line-height: 1.6;
  font-size: 1.1rem;
  color: #555;
}

footer {
  background-color: #222;
  text-align: center;
  padding: 1rem;
}

footer p {
  color: white;
  margin: 0;
}