Styles (indicator, jiggle animation) and nav aria-selected behavior were inline Python strings in sx/app.py. Now they live in sx/sx/init.sx as proper SX source — styles via collect! "cssx", nav via dom-listen. The shell's inline_css is empty; CSSX handles style injection on boot. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>