body {
  font-family: Courier New, Courier, Lucida Sans Typewriter, Lucida Typewriter, monospace;
  background-color: antiquewhite;
}
main {
  max-width: 800px;
  margin: auto;

  display: flex;
  flex-direction: column;
}

.calltoaction {
  width: 100%; 
  text-align: center;
}
.calltoaction a {
  font-size:xx-large;
}