#pcc-form {
  max-width: 400px;
  padding: 1em;
  background: #f7f7f7;
  border: 1px solid #ddd;
  font-family: sans-serif;
}
#pcc-form label { display: block; margin-bottom: 0.5em; }
#pcc-form input, #pcc-form select, #pcc-form button {
  width: 100%; padding: 0.5em; margin-bottom: 1em;
  box-sizing: border-box;
}
#pcc-result { font-size: 1.2em; }