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<!DOCTYPE HTML>
<html><head>
<meta charset="utf-8">
<style type="text/css">
html,body {
color:black; background-color:white; font-size:16px; padding:0; margin:20px;
}
div {
position: absolute;
left: 0;
right: 0;
box-shadow: 0 0 0 10px rgba(0, 255, 0, 0.5);
margin-top: 10px;
height: 40px;
}
span {
position: relative;
display: block;
overflow: hidden;
height: 100px;
}
</style>
</head>
<body><span><div></div><span></body></html>