css helper center - SERP Analysis

https://www.w3schools.com/css/css_align.asp

https://stackoverflow.com/questions/25496617/css-calc-with-center-offset

https://css-tricks.com/quick-css-trick-how-to-center-an-object-exactly-in-the-center/

http://howtocenterincss.com/

https://www.joshwcomeau.com/css/center-a-div/

https://csshope.org/

https://developer.mozilla.org/en-US/docs/Web/CSS/How_to/Layout_cookbook/Center_an_element

https://docs.conterra.de/en/mapapps/4.9/developersguide/layout/css-helper-classes.html

https://community.pega.com/sites/pdn.pega.com/files/help_v731/ui/ui-CSS-helper-classes/ui-helper-classes-con.htm

https://community.glideapps.com/t/how-to-center-chips-with-css/53321