body {
  font-family: sans-serif;
  font-size: 16px;
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
}

form {
  display: flex;
  flex-direction: column;
}

label {
  margin-top: 12px;
  margin-bottom: 4px;
}

input,
select,
textarea {
  font-size: 14px;
  padding: 6px;
}

textarea {
  min-height: 80px;
}

button[type="submit"] {
  margin-top: 16px;
  padding: 8px 12px;
  font-size: 14px;
}

#form-result {
  margin-top: 16px;
  border: 1px solid;
  padding: 8px;
  min-height: 1em;
}

#form-result:empty {
  border: none;
  padding: 0;
}