<IfModule mod_rewrite.c>
    Options +FollowSymlinks
    RewriteEngine On
</IfModule>

<IfModule mod_rewrite.c>
    # deal with admin first
    RewriteCond %{REQUEST_URI} ^/(admin)
    RewriteRule ^admin/assets/(.*)$ backend/web/assets/$1 [L]
    RewriteRule ^admin/css/(.*)$ backend/web/css/$1 [L]

    RewriteCond %{REQUEST_URI} !^/backend/web/(assets|css)/
    RewriteCond %{REQUEST_URI} ^/(admin)
    RewriteRule ^admin/.*$ backend/web/index.php?r=$1 [L]

    RewriteCond %{REQUEST_URI} ^/(assets|css)
    RewriteRule ^assets/(.*)$ frontend/web/assets/$1 [L]
    RewriteRule ^css/(.*)$ frontend/web/css/$1 [L]

    RewriteCond %{REQUEST_URI} !^/(frontend|backend)/web/(assets|css)/
    RewriteCond %{REQUEST_URI} !index.php
    RewriteCond %{REQUEST_URI} !^/(admin)
    RewriteCond %{REQUEST_FILENAME} !-f [OR]
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^?*$ frontend/web/index.php?r=$1 [L]
</IfModule>