body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9fb;
  color: #333;
  line-height: 1.6;
}

header {
  background: #222;
  color: #fff;
  padding: 2rem 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

nav {
  margin-top: 1rem;
}

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

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

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

section {
  margin-bottom: 3rem;
}

h2 {
  color: #444;
  border-bottom: 2px solid #ddd;
  padding-bottom: 0.5rem;
}

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