img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

ul li a {
  text-decoration: none;
  color: black;
}

footer {
}