If you've worked with designers, you know the routine. They hand you PDF templates: invoices, reports, certificates. Specific fonts, aligned columns, logos. You look at it and think: "I could build this in HTML and CSS in 20 minutes." So you do. Puppeteer. page.pdf(). Perfect output. Then reality hits. A client clicks "Download All" on 5,000 invoices and your server melts. I optimized everything I