Edit in JSFiddle

.name-container:focus-within {
  background: yellow;
}
input { 
  margin: 4px; 
}

<div class="name-container">
  <label for="given_name">
    Given Name:
    <input id="given_name" type="text">
  </label>
  <label for="family_name">
    Family Name:
    <input id="family_name" type="text">
  </label>
</div>