<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
body {
background: #c2c2c2;
font-size: 90%;
}
main {
background: #fff;
margin: 20px 0;
padding: 50px;
}
main a {
background: #83d483;
color: #fff;
padding: 40px 30px;
text-decoration: none;
}
</style>
</head>
<body>
<main>
<a href="#0">1</a>
<a href="#0">2</a>
<a href="#0">3</a>
</main>
</body>
</html>