server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Serve text responses as UTF-8. Without this nginx omits the charset and
    # browsers fall back to a locale guess (Windows-1252 on DE systems), which
    # turns valid UTF-8 in llms.txt / robots.txt into mojibake (â€", für).
    charset utf-8;
    charset_types text/plain text/css text/xml application/javascript application/json image/svg+xml;

    # AI-discovery files (llms.txt, robots.txt): always served as UTF-8 plain
    # text, never swallowed by the clean-URL fallback, and readable cross-origin
    # so any AI crawler or tool can fetch them.
    location ~* \.txt$ {
        try_files $uri =404;
        default_type text/plain;
        add_header Access-Control-Allow-Origin "*" always;
        add_header Cache-Control "public, max-age=3600" always;
    }

    # Serve clean URLs by trying $uri, then $uri.html
    location / {
        try_files $uri $uri.html $uri/ /index.html;
    }

    # Cache static assets
    location ~* \.(png|jpg|jpeg|gif|ico|svg|woff|woff2)$ {
        expires 30d;
        add_header Cache-Control "public, immutable";
    }

    # Gzip
    gzip on;
    gzip_types text/html text/css text/plain application/javascript application/json image/svg+xml;
}