body {
  margin: 2em 5em;
  font-size: large;
  font-family: Tahoma;
}

spacer-15 {
  display: block;
  height: 15px;
}

indent-block {
  display: block;
  margin: 0px 25px;
}

.app {
  display: table-cell;
  font-family: Tahoma;
  background-color: #666;
  color: white;
  padding: 5px 25px;
}
.hello {
  font-family: 'Comic Sans MS';
  color: maroon;
}

.goodbye {
  font-family: 'Comic Sans MS';
  color: maroon;
}