CSS Hover Animation Selector Before After

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS Hover Animation Selector Before After</title>
    <style>


.portrait {
  box-sizing: border-box;
  width: 350px;
  height: 450px;
  border: 2px solid red;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(128, 128, 128, 0.2);
}

.face {
  border-top: 30px solid red;
  box-sizing: border-box;
  width: 200px;
  border-radius: 50%;
  height: 300px;
  padding: 80px 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: black;
}

.face:before {
  box-sizing: border-box;
  content: "";
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: white;
  display: inline-block;
  transform: translate(5px, -20px);
  border-top: 15px solid red;
}

.portrait:hover .face:before {
  border-top: 60px solid red;
  transition: all 0.1s linear;
}

.portrait:hover .left_eye {
  z-index: -1;
}

.face:after {
  box-sizing: border-box;
  content: "";
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: white;
  display: inline-block;
  transform: translate(70px, -20px);
  border-top: 15px solid red;
}

.mouth {
  box-sizing: border-box;
  width: 90px;
  height: 80px;
  border-radius: 50%;
  background-color: transparent;
  display: inline-block;
  position: absolute;
  top: 150px;
  left: 55px;
  border-bottom: 15px solid white;
}

.left_eye {
  box-sizing: border-box;
  border: 15px solid;
  border-radius: 50%;
  display: inline-block;
  position: absolute;
  top: 80px;
  left: 25px;
}

.right_eye {
  box-sizing: border-box;
  border: 15px solid;
  border-radius: 50%;
  display: inline-block;
  position: absolute;
  top: 80px;
  left: 145px;
  z-index: 1;
}

    .tube {
      position: absolute;
      top: 10px;
      left: 10px;
      text-decoration: none;
      background-color: red;
      width: 150px;
      text-align: center;
      color: snow;
      font-family: arial black;
      padding: 5px 20px;
    }


</style>
</head>
<body>

<div class='portrait'>
  <span class='face'>
    <span class='mouth'></span>
    <span class='left_eye'></span>
    <span class='right_eye'></span>
  </span>
</div>

<a class='tube'  href='https://youtu.be/2vMDuLJIT7U'>See it on YouTube</a>

  <script></script>
</body>
</html>