pre {
  color: inherit;
  background: #EEE;
  font-size: 1.1em;
  line-height: 1.1em;
  border: dashed #666 1px;
  padding: 15px 20px 15px 20px;
  overflow: auto;
}
.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.small {
  font-size: x-small;
  font-family: serif, sans-serif;
}
.big {
  font-size: 300%;
  font-family: serif, sans-serif;
}
.view {
  vertical-align: middle;
  margin: 0px 10px;
}