html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: #151922;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

main {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  box-sizing: border-box;
}

img {
  display: block;
  width: min(38vw, 300px);
  max-width: 80vw;
  height: auto;
}