html {
  font-size: 62.5%;
  font-family: serif; }

body {
  font-size: 1.8rem;
  line-height: 1.618;
  max-width: 38em;
  margin: auto;
  color: #d9d8dc;
  
  background: url(https://files.catbox.moe/pda2lq.png) no-repeat center fixed;
  background-size: cover;
}