#cform {
  padding: 2rem;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0,0,0,.1);
  max-width: 400px;
  background: #fff;
}
#cinput {
  display: block;
  height: 50px;
  margin-right: 0.5rem;
  text-align: center;
  font-size: 1.25rem;
  min-width: 0;
  &:last-child {
    margin-right: 0;
  }
}