body {
     background: linear-gradient(135deg, #FFFFFF 0%, #F0F0F0 100%);
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
}

nav ul li {
  flex: 1;
  text-align: center;
}

nav ul li a {
  display: block;
  padding: 10px 20px;
  text-decoration: none;
  color: black;
  border: 1px solid black;
}

footer {
	text-align: center;
}

header > h1 {
   font-size: 40px;
}