- Fix horizontal scrollbar on mobile by using max() in calc() for sidebar positioning
- Prevent negative positioning of fixed sidebars on narrow viewports
- Fix tab bar overflow on viewports under 420px by reducing padding and font sizes
- Add responsive breakpoints for header and tab padding at 420px and 320px
- Fix URLs not showing when they appear at the end of posts with media
- Only hide t.co URLs when they actually point to media, not external sites
- Convert all remaining t.co URLs to clickable links regardless of media presence
- Fix Safari mobile video fullscreen issue by adding playsinline attribute
- Add webkit-playsinline CSS property for video elements
- Improve responsive breakpoints for sidebars positioning