# Disable directory browsing
Options -Indexes

# Require authentication for sensitive app files
<RequireAll>
    Require valid-user
</RequireAll>

# Security headers
<IfModule mod_headers.c>
    Header always set X-Content-Type-Options nosniff
    Header always set X-Frame-Options SAMEORIGIN
    Header always set X-XSS-Protection "1; mode=block"
    Header always set Referrer-Policy "strict-origin-when-cross-origin"
</IfModule>