html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  background: #ffffff;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

main {
  padding: 2rem;
  max-width: 90vw;
}

img {
  display: block;
  width: 100%;
  max-width: 720px;
  height: auto;
}