server {
    listen 80;
    server_name localhost;

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

    # Handle SPA routing (fallback to index.html)
    location / {
        try_files $uri $uri/ /index.html;
    }

    # PHP handling (if PHP files exist)
    location ~ \.php$ {
        # Uncomment below if using PHP-FPM
        # fastcgi_pass php:9000;
        # fastcgi_index index.php;
        # fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        # include fastcgi_params;

        # For static sites without PHP, return 404
        return 404;
    }

    # Cache static assets
    location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg|woff|woff2|ttf|eot|pdf)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # 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;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied expired no-cache no-store private auth;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
}