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

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript application/rss+xml application/atom+xml image/svg+xml;

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

    # HTML — no cache (always fresh)
    location ~* \.html$ {
        add_header Cache-Control "no-store, no-cache, must-revalidate";
    }

    # Static assets — 1 year immutable
    location ~* \.(css|js|webp|jpg|jpeg|png|gif|ico|svg|woff|woff2|ttf|eot|otf)$ {
        expires 1y;
        add_header Cache-Control "public, max-age=31536000, immutable";
        access_log off;
    }

    # RSS/Atom feed MIME type
    location ~* \.(rss|atom)$ {
        types { application/rss+xml rss; application/atom+xml atom; }
    }

    # Clean URLs
    location / {
        try_files $uri $uri/ $uri.html =404;
    }

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

    # Block hidden files
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }
}