We should avoid using Bootstrap utility classes (or even raw CSS) to hard-code styling of elements inside of layouts. Instead define an appropriate td- prefixed class, and add the styling to the class. Otherwise, it becomes difficult for clients to customize element styles.

• Show breadcrumbs on mobile too #784
• Blog layout: streamline and fix styling RSS button #1193
• Search styling refactoring, and fix for offline search #1279
• [BSv5] Navbar: add inner container + cleanup #1422
• Fix link text and hover color contrast for all bgs #1525
• [BSv5] Fix blog posts list flex layout #1566
• Factor sidebar-toc styles, and 0.13.0 + 0.14.0 blog post improvements #2527 for .td-sidebar-toc
• More changes are coming!

• This is in support of: Docsy/User-guide "skin" styles should be factored out and/or dropped in some cases #1655
• Related to: Support easy disabling of Docsy styles for HTML elements #1431