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I did some tweaks to improve site overall accessibility -
Working sr-only class from bootstrap
Outline on focused elements
oblique to help identify links
Visible label in for search form
higher color contrast
improve: sidebar accessibility
Jump to sidebar instead of content (content is before the sidebar in the tab order)
Move aside outside of main landmark
Added labels to identify sidebar elements
try to apply correct tag and roles to sidebar elements
Other fixes -
improve: css fonts loading performance
fix: continue reading contain html elements so should not be escaped