body, html {
  margin: 2;
  padding: 2;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#ad-link {
  display: block;
  width: 100%;
  height: 100%;
}

#ad-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}