Fill remaining width

by myrluk3

HTML

<div id="container">
  <div>
    <label>Simple label
      <input>
    </label>
  </div>
  <div>
    <label>Other label
      <input>
    </label>
  </div>
  <div>
    <label>Variable label
      <input>
    </label>
  </div>
</div>

CSS

#container div {
  margin: 10px 0;
  width: 300px;
}

input {
  flex-grow: 1;
}

label {
  display: flex;
}