header nav {
  float: left;
  margin-top: 10px;
  font-size: 140%;
}

a {
  text-decoration-line: none;
  color: azure;
}

ul {
  list-style:none
}

body {
  padding: 0;
  margin: 0;
  background-color: black;
  color:dimgray
}

h1 {
  text-align: center;
}