Tab-Strip Anchor Navigation(TSAN) — A New Technique for HTML Tab UI in PDF (No JavaScript, No Layers)

You know that moment when you're building something and hit a wall that every reasonable part of your brain says should already be solved by now? That was me, three weeks ago, staring at an HTML component with tabs. Not some exotic, over-engineered UI. Just tabs. The kind every front-end dev builds on their lunch break. A nav strip at the top, panels below, click a tab and the content switches. Dead simple. Except I wasn't trying to render it in a browser. I wanted to render it in a PDF. A lit...