@media (prefers-color-scheme: dark) {
  body {
    background-color: #202020;
    color: white;
  }
  ul {
    background-color: #333333;
  }
  ul li a {
    color: white;
  }
}
@media (prefers-color-scheme: light) {
  ul {
    background-color: #cccccc;
  }
  ul li a {
    color: black;
  }
}

body {
  margin: 0;
  padding: 0;
}

h1, h2, p, img {
  margin: 10px;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: flex-end;
}

ul li a {
  display: block;
  padding: 14px 16px;
  text-decoration: none;
}

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