server {
    listen 80 default_server;
    listen [::]:80 default_server;

    server_name _;

    root /var/www/atheos;
    index index.php index.html;

    # --- logging ---------------------------------------------------------
    access_log /var/log/nginx/atheos.access.log;
    error_log  /var/log/nginx/atheos.error.log;

    # --- PHP: the socket path here MUST byte-match the pool's `listen =`
    #     in /etc/php83/php-fpm.d/www.conf  (interface I-1 -> else bare 502)
    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/run/php-fpm83/php-fpm.sock;
        fastcgi_index index.php;
        include fastcgi.conf;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }

    location / {
        try_files $uri $uri/ =404;
    }

    # --- hardening (free, no downside) -----------------------------------
    # never serve the VCS directory, the app's private data, or dotfiles
    location ~ /\.git       { deny all; }
    location ~ /\.ssh       { deny all; }
    location ~ /\.           { deny all; }
    location ~ ^/data/      { deny all; }
    location ~ ^/(config\.php|common\.php|controller\.php|traits/) { deny all; }
    location ~* \.(md|py|sh|log|conf|ini|sql|bak|orig)$ { deny all; }

    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    client_max_body_size 64m;

    # Atheos serves theme/main.min.css and the generated *.min.js/css bundles from STABLE URLs
    # with no cache headers. Without this, a CSS/JS change stays invisible behind a cached copy
    # until the user hard-refreshes. "no-cache" permits caching but forces revalidation, so a
    # 304 keeps normal loads fast while guaranteeing updates are picked up on the next load.
    location ~* \.(css|js)$ {
        add_header Cache-Control "no-cache, must-revalidate";
        try_files $uri =404;
    }
}