#slideshow {
  width: 500px;
  height: 600px;
  position: relative;
  overflow: hidden;
}

#preview {
  position: absolute;
}

ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

main a {
  display: block;
  width: 400px;
  line-height: 48px;
  font-size: 24px;
  text-decoration: none;
  border: 4px solid pink;
  border-radius: 12px;
  background: lightcyan;
  color: pink;
  text-align: center;
}