PHP&CSS gomb

PHP kód: (index.php)

<html>
 <head>
 <title>Gomb</title>
  <link href="style.css" rel="stylesheet">
 </head>

<body>
  <center>
  <a href="http://google.hu" class="link">Google</a>
  </center>
</body>
</html>

CSS kód: (style.css)

.link {
background-color: #7b90b2;
color: #323335;
border: 3px solid black;
font-size: 25px;
text-decoration: none;
}

.link:hover {
background-color: #7b90b2;
color: #323335;
border: 5px solid black;
font-size: 30px;
text-decoration: none;
}