When I do this, the page does not display, my win10
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Equal width from top to bottom</title>
<style type="text/css">
.container{
max-width: 960px;/*Set the maximum width to 960px*/
margin: 0 auto;/*Set the inner block element to be horizontally centered*/
}
.header{
height:50px;
background-color: #000000;
}
.main{
height: 600px;
background-color: #6531D0;
}
.footer{
height:50px;
background-color : #000000;
}
</style>
</head>
