main {
  padding: 30px 0;
  background: rgb(255 255 255 / .75);
  text-align: center;
}

#msg {
  width: 80%;
  margin: 0 auto;
  line-height: 1.4em;
  font-size: 1em;
  text-align: center;
}

@media screen and (min-width: 900px), print {

#msg {
  width: 900px;
}
}