delete `$width-column-n` variables
devide "Flat UL" more strictly
remove "Flat UL" bullets
inclease "Searchbox" width
layout based on content
add `pre` border & bg
remove background from "Paging"
update "Code Highlight" colorscheme

Blue based colorscheme is hardly distinguishable from link.
add breakpoint width info.
remote obsolete partial
version 6.43.0