Кнопка Back CSS
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>a{text-decoration: none; display: inline-block; padding: 8px 16px;}a:hover{background-color: #ddd; color: black;}.previous{background-color: #f1f1f1; color: black;}.next{background-color: #04AA6D; color: white;}</style>
</head>
<body><a href="#" class="previous">« Previous</a><a href="#" class="next">Next »</a> </body>
</html>
Undefined