body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header, footer {
  background-color: #333;
  color: white;
  text-align: center;
  padding: 1em 0;
}

nav ul {
  list-style-type: none;
  padding: 0;
  background-color: #444;
}

nav ul li {
  display: inline;
  margin-right: 10px;
}

nav ul li a {
  color: white;
  text-decoration: none;
}

main {
  padding: 1em;
}

h1, h2 {
  color: #333;
}

a {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 20px;
  background-color: #333;
  color: white;
  text-decoration: none;
}

a:hover {
  background-color: #555;
}

button {
  padding: 10px 20px;
  background-color: #333;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #555;
}