server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # TLS terminates at Dokploy's Traefik; keep redirects relative so they stay on https.
    absolute_redirect off;

    # The client address arrives in X-Forwarded-For from Traefik on the private network.
    set_real_ip_from 10.0.0.0/8;
    set_real_ip_from 172.16.0.0/12;
    set_real_ip_from 192.168.0.0/16;
    real_ip_header X-Forwarded-For;
    real_ip_recursive on;
    server_tokens off;

    gzip on;
    gzip_comp_level 6;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml application/xml application/javascript application/json image/svg+xml;

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

    location = /healthz {
        access_log off;
        default_type text/plain;
        return 200 "ok\n";
    }

    # The contact form is the one dynamic path: server/contact.mjs, sending by SMTP.
    location = /contact {
        limit_except POST { deny all; }
        client_max_body_size 64k;
        proxy_pass http://127.0.0.1:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_read_timeout 30s;
        proxy_intercept_errors on;
        error_page 502 503 504 = @contact_down;
    }
    # Handler not running: send the visitor to the error page in their language.
    location @contact_down {
        if ($http_referer ~ "/de(/|$|#)") { return 303 /de/contact/error; }
        return 303 /contact/error;
    }

    # trailingSlash: 'never' — /team is served from /team/index.html; /team/ redirects to /team.
    location ~ ^(.+)/$ {
        return 301 $1$is_args$args;
    }

    location / {
        try_files $uri $uri.html $uri/index.html =404;
    }

    # Astro's hashed build assets never change.
    location ^~ /_astro/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        add_header X-Content-Type-Options "nosniff" always;
        try_files $uri =404;
    }

    location ~* \.(?:woff2|mp4|webm|avif|webp|jpg|jpeg|png|svg)$ {
        add_header Cache-Control "public, max-age=2592000" always;
        add_header X-Content-Type-Options "nosniff" always;
        try_files $uri =404;
    }

    error_page 404 /404.html;
    location = /404.html {
        internal;
    }
}