animated slide up

index.html

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>Animated Slide Up</title>
  <meta name="robots" content="noindex, nofollow">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="styles.css">
</head>

<body>
  <header>
    <h1>Animated Slide Up</h1>
  </header>
  <div class="wrapper">
    <div class="container">
      <h2>Heading</h2>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Cum quibusdam ea atque cumque neque distinctio officia, similique saepe consequuntur, dignissimos officiis aspernatur totam non itaque! Natus voluptatem quasi nostrum doloribus.
      </p>
      <div class="gallery">
        <a href="#"><img src="images/bienale-1.jpg" alt="art"></a>
        <a href="#"><img src="images/bienale-2.jpg" alt="art"></a>
        <a href="#"><img src="images/bienale-3.jpg" alt="art"></a>
      </div>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dolorum, commodi voluptatibus eligendi. Quam velit repellat minus, sit necessitatibus ad laborum aperiam eaque exercitationem quae vel architecto ex laboriosam nihil modi.</p>
    </div>
    <!-- .container-->
  </div>
  <!-- .wrapper-->
  <footer>
    <small><a href="https://opensource.org/licenses/MIT">MIT</a></small>
  </footer>
</body>

</html>

styles.css

body {
  background: #eeeeee;
  font-size: 16px;
  font-family: "Trebuchet MS", Helvetica, sans-serif;
  margin: 0;
}

a {
  color: crimson;
  text-decoration: none;
}

a:hover {
  color: red;
}


/* Layout
------------------------------------------*/

header,
.container,
footer {
  margin: 0 auto;
  width: 88%;
  max-width: 1080px;
}

.wrapper {
  padding: 1em 0;
  background: #ffffff;
}



/* Animated slide up
------------------------------------------*/

.gallery {
  display: flex;
  justify-content: space-between;
}

@keyframes slide-up {
  from {
    transform: translateY(300px);
    margin-bottom: 500px;
  }
  to {
    transform: translateY(0);
    margin-bottom: 0;
  }
}

.gallery {
  animation: slide-up 3s forwards;
}