ul {
  list-style-type: none;
  margin: auto;
  padding: 0;
  overflow: hidden;
  background-color: #333333;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  
}

li {
  list-style: none;
  display: inline-block;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 16px;
  text-decoration: none;
}

li a:hover {
  background-color: #111111;
}

h1, p {
  text-align:center;
}