<!DOCTYPE html>
<html>
<head>
<style>
body {
    margin: 0;
    padding: 0;
}

#square {
    background-color: red;
    width: 100px;
    height: 100px;
}
</style>
<link rel="stylesheet" href="resources/echo-data-encoding-with-gzip.php?type=text/css&q=%23square+%7B+background-color%3A+green+%21important%3B+%7D">
</head>
<body>
<div id="square"></div>
</body>
</html>