wordpress - custom login style

functions.php

<?php
// Modify Logo URL
add_filter( 'login_headerurl', 'login_page_url');
function login_page_url(){
  return home_url();
}

// Modify Login Title
add_filter( 'login_headertitle', 'login_page_title');
function login_page_title(){
  return get_bloginfo('title', 'display' );
}

// Stylesheet override
add_action('login_head', 'login_page_logo');
function login_page_logo()
{
  echo '<link rel="stylesheet" href="' . get_bloginfo('template_directory') . '/login.css" />';
}

// Custom Login Message on Redirect
add_filter('login_message', 'login_page_text');
function login_page_text()
{
  if(isset($_GET['reauth']))
  {
    return '<p class="message">You need to login to view this content</p>';
  }
}
?>

login.css

.login h1 a {
background: url(../img/logo-login.png) no-repeat top center;
width: 165px;
height: 165px;
text-indent: -9999px;
overflow: hidden;
padding-bottom: 15px;
display: block;
margin: 0 auto;
}
input.button-primary:hover, input.button-primary:active {
border-color: green;
background: green;
}