body {
  background-color: #f4f4f4;
  font-family: sans-serif;
}

.description {
  float: left;
  width: 450px;
  font-family: monospace;
}

.app {
  float: left;
  left: 50%;
  top: 50%;
  height: 200px;
  width: 220px;
  padding: 10px;
  margin: 50px 50px 50px 50px;
}

.footer {
  clear: both;
  padding: 10px;
}

fieldset {
  border-style: none;
}

input {
  display: block;
  margin-bottom: 10px;
  padding: 5px;
}

output {
  font-family: monospace;
  font-size: x-large;
}