body {
  font-family: 'Arial', sans-serif;
  background-color: #f9f9f9;
  color: #333;
  text-align: center;
  margin: 0;
}

header {
  background-color: #333;
  padding: 1em;
}

.menu {
  list-style: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 1em;
}

.menu li {
  display: inline;
}

.menu a {
  text-decoration: none;
  color: white;
  padding: 0.5em 1em;
  background-color: #0078d4;
  border-radius: 8px;
}

.menu a:hover {
  background-color: #005fa3;
}

main {
  padding: 2em;
}