RewriteEngine On

# 🚫 Disable directory listing everywhere
Options -Indexes

# 🚫 Block CI core folders
RewriteRule ^(application|system) - [F,L]

# 🚫 Block hidden files
RewriteRule (^|/)\. - [F,L]

# CI front controller
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php/$0 [PT,L]

<IfModule mod_headers.c>
    Header set X-Content-Type-Options nosniff
    Header set X-Frame-Options DENY
    Header set X-XSS-Protection "1; mode=block"
</IfModule>