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

    # Clean URLs - serve .html files without extension
    location / {
        try_files $uri $uri.html $uri/ /404.html;
    }

    # Cache static assets
    location ~* \.(jpg|jpeg|png|gif|ico|svg|css|js|woff2)$ {
        expires 30d;
        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 Referrer-Policy "strict-origin-when-cross-origin" always;

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