* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
body {
  font-size: 26px;
}
textarea {
  width: 100%;
  font-size: 14px;
}
.source, .target {
  float: left;
  width: 100%;
  padding: 5px;
  font-size: 12px;
  font-family: 'Mono', sans-serif;
}