body {
  display: flex;
  background-image: url(er.jpg);
  background-repeat: no-repeat;
  font-family: 'Rubik', sans-serif;
  background-position: center;
  background-attachment: fixed;
  background-size: cover;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}
.title{
    font-size: 28px;
}
pre {
  display: block;
  font-family: 'Rubik', sans-serif;
  white-space: pre;
  margin: 1em 0;
}