Better WP Security prevents theme access to CSS file

Why the codes from Better WP Security in .htaccess file prevents the theme file access to css file in this folder /wp-admin/css/wp-admin.min.css?ver=3.6

I am using plugin Password Protected and it is using css file /wp-admin/css/wp-admin.min.css?ver=3.6 but Better WP Security cod ein .htaccess blocks accessing to this css file and so the theme from Password Protected not displaying correctly.

So int his code, how do I exclude the css file?

# BEGIN Better WP Security
Options -Indexes

<IfModule mod_rewrite.c>
RewriteEngine On

RewriteRule ^login/?$ /wp-login.php?vus65jti325i5wjg60nwg [R,L]

RewriteCond %{HTTP_COOKIE} !^.*wordpress_logged_in_.*$
RewriteRule ^admin/?$ /wp-login.php?vus65jti325i5wjg60nwg&redirect_to=/wp-admin/ [R,L]

RewriteRule ^admin/?$ /wp-admin/?vus65jti325i5wjg60nwg [R,L]

RewriteRule ^register/?$ /wp-login.php?vus65jti325i5wjg60nwg&action=register [R,L]

RewriteCond %{SCRIPT_FILENAME} !^(.*)admin-ajax\.php
RewriteCond %{HTTP_REFERER} !^(.*)mydomain.com/wp-admin
RewriteCond %{HTTP_REFERER} !^(.*)mydomain.com/wp-login\.php
RewriteCond %{HTTP_REFERER} !^(.*)mydomain.com/login
RewriteCond %{HTTP_REFERER} !^(.*)mydomain.com/admin
RewriteCond %{HTTP_REFERER} !^(.*)mydomain.com/register
RewriteCond %{QUERY_STRING} !^vus65jti325i5wjg60nwg
RewriteCond %{QUERY_STRING} !^action=logout
RewriteCond %{QUERY_STRING} !^action=rp
RewriteCond %{QUERY_STRING} !^action=register
RewriteCond %{QUERY_STRING} !^action=postpass
RewriteCond %{HTTP_COOKIE} !^.*wordpress_logged_in_.*$
RewriteRule ^.*wp-admin/?|^.*wp-login\.php /not_found [R,L]

RewriteCond %{QUERY_STRING} ^loggedout=true
RewriteRule ^.*$ /wp-login.php?vus65jti325i5wjg60nwg [R,L]
</IfModule>
# END Better WP Security

http://wordpress.org/plugins/better-wp-security/