Here is my header.php links.when i enter bloginfo('stylesheet_url') for style.css after running page showing blank sceen.
<link href="http://fonts.googleapis.com/css?family=Lato:300,400,400italic,600,700|Raleway:300,400,500,600,700|Crete+Round:400italic" rel="stylesheet" type="text/css" />
<link rel="stylesheet" type="text/css" media="all" href="<?php bloginfo('stylesheet_url');?>" />
<link rel="stylesheet" href="css/bootstrap.css" type="text/css" />
<!--<link rel="stylesheet" href="style.css" type="text/css" />-->
<link rel="stylesheet" href="css/dark.css" type="text/css" />
<link rel="stylesheet" href="css/font-icons.css" type="text/css" />
<link rel="stylesheet" href="css/animate.css" type="text/css" />
<link rel="stylesheet" href="css/magnific-popup.css" type="text/css" />
<link rel="stylesheet" href="css/responsive.css" type="text/css" />
<meta name="viewport" content="width=device-width, initial-scale=1" />