<!DOCTYPE html>
<html>
<body>
<section class="main" role="main">
    <style type="text/css">
        .btn[data-add-favorite]:not(:hover) {
            -webkit-transition: background-color 0.5s;
            -moz-transition: background-color 0.5s;
            -o-transition: background-color 0.5s;
            -ms-transition: background-color 0.5s;
            transition: background-color 0.5s;
        }

        .btn-favorite,
        .btn-favorite:active,
        .btn-favorite:focus,
        .btn-favorite:hov