500 Internal Server error after edit functions.php

Hy people, i edited my functions.php because i wanted to use my blog logo on wp-admin instead the wordpress logo.

I add this code on the functions.php

// Custom WordPress Login Logo
function my_login_logo() { ?>
body.login div#login h1 a {
background-image: url(/img/site-login-logo.png);
padding-bottom: 30px;
}

<?php }
add_action( 'login_enqueue_scripts', 'my_login_logo' );

When i sended the edited functions.php the site crashed. 500 Internal Server. After this error I sended again the original functions.php (i did a backup), to remove the error, BUT, the 500 internal still running.

I tried a lot of thing but the error still on.
Could anyone help me?

Thanks a lot

ps: i’m brazilian, sorry about my english