resize issue

Style.css

body
{
background-color: blue;
}
#info
{
background-color: white;
margin: 25px 100px 100px 100px;
border-style: inset;
border-width: 10px;
padding: 10px;
}
#logo
{
margin-left: 5px;
margin-right: 815px;
margin-top: 5px;
margin-bottom: 115px;
}


INDEX.HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="keywords" content="" />
<meta name="description" content="" />
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>Daniel Hopkins Personal Website</title>

<link href="style.css" rel="stylesheet" type="text/css" media="screen" />
</head>

<body>
<div id = "info">

<div id = "logo">
<img src="logo.png" alt="some_text" width=600 height=450>
</div>

</div>
</body>

</html>