Untitled

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link rel="stylesheet" href="./css/style1.css">
  <title>Flexbox Links</title>

  <style>
    a {
      border: 2px red solid;
      display: flex;
      flex-direction: row;
      height: 100px;
      width: 250px;
      justify-content: center;
      align-items: center;
      margin:10px;
    }

    a span {
      display: flex;
      flex-direction: row;
      justify-content: center;
      align-items: center;

    }

    a span:nth-child(1) {
      font-size: 20px;
      color: red;
    }

    a span:nth-child(2) {
      font-size: 10px;
    }
  </style>
</head>

<body>

  <a href="#">Hello World!</a>
  <a href="#">Hello World! Lorem ipsum dolor sit amet consectetur adipisicing elit.</a>
  <a href="#">Hello World! Lorem ipsum</br> dolor sit amet</br> consectetur adipisicing elit.</a>
  <a href="#"><span>Hello World!</span><span>Good Bye!</span></a>
  <a href="#"><span>Hello World! Lorem ipsum dolor</span><span>sit amet consectetur adipisicing elit.</span></a>

</body>

</html>