body {
  background-color: black;
  color: white;
  justify-content: center;
}

nav ul {
  list-style: none;
  justify-content: center;
  display: flex;
}

nav a {
  text-decoration: none;
  padding: 1rem;
  color: grey
}
nav a:hover {
  background-color: grey;
  border-radius: 3px;
  color: black;
}