Filtered Cards Animation

<link href="https://fonts.googleapis.com/css?family=Montserrat:400,500,700" rel="stylesheet">

<section class="hero-section">
  <div class="card-grid">
    <a class="card" href="#">
      <div class="card__background" style="background-image: url(https://images.unsplash.com/photo-1557177324-56c542165309?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80)"></div>
      <div class="card__content">
        <p class="card__category">Category</p>
        <h3 class="card__heading">Example Card Heading</h3>
      </div>
    </a>
    <a class="card" href="#">
      <div class="card__background" style="background-image: url(https://images.unsplash.com/photo-1557187666-4fd70cf76254?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=60)"></div>
      <div class="card__content">
        <p class="card__category">Category</p>
        <h3 class="card__heading">Example Card Heading</h3>
      </div>
    </a>
    <a class="card" href="#">
      <div class="card__background" style="background-image: url(https://images.unsplash.com/photo-1556680262-9990363a3e6d?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=60)"></div>
      <div class="card__content">
        <p class="card__category">Category</p>
        <h3 class="card__heading">Example Card Heading</h3>
      </div>
    </li>
    <a class="card" href="#">
      <div class="card__background" style="background-image: url(https://images.unsplash.com/photo-1557004396-66e4174d7bf6?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=60)"></div>
      <div class="card__content">
        <p class="card__category">Category</p>
        <h3 class="card__heading">Example Card Heading</h3>
      </div>
    </a>
  <div>
</section>