body {
  font-family: sans-serif;
  max-width: 800px;
  margin: auto;
  padding: 1em;
  line-height: 1.6;
}
nav ul {
  list-style-type: none;
  padding: 0;
  display: flex;
  gap: 15px;
  margin-bottom: 1.5em;
}
nav a {
  text-decoration: none;
  color: #0055aa;
}
nav a:hover {
  text-decoration: underline;
}
footer {
  margin-top: 40px;
  font-size: 0.9em;
  color: #555;
  border-top: 1px solid #ccc;
  padding-top: 10px;
  text-align: center;
}