Add color-coded left borders to post cards on all blog listing and
category pages, and make sidebar widgets collapsible with localStorage
persistence on both listing and single-post sidebars.
- Make all headings responsive (text-2xl sm:text-3xl pattern)
- Make all section headings responsive (text-xl sm:text-2xl)
- Add responsive margins (mb-6 sm:mb-8 pattern)
- Fix flex layouts to stack on mobile (flex-col sm:flex-row)
- Make images responsive (w-20 sm:w-24 pattern)
- Add responsive padding (p-4 sm:p-6)
- Improve grid gaps for mobile (gap-3 sm:gap-4)
- Add CSS utilities for table overflow and touch scrolling
- Restyle 404 page with proper responsive design
Files updated: 22 template and CSS files across all pages
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
