Set an offset for an onpage anchor, for example if a website has a fixed header and the first part of a paragraph gets hiden. Just add a class of "anchor" to the element in question. Credits: https://stackoverflow.com/questions/4086107/html-positionfixed-page-header-and-in-page-anchors

anchor-offset

*.anchor:before { 
  display: block; 
  content: " "; 
  margin-top: -75px; // Set the Appropriate Height
  height: 75px; // Set the Appropriate Height
  visibility: hidden; 
}

/* or */

*[id]:before { 
  display: block; 
  content: " "; 
  margin-top: -75px; // Set the Appropriate Height
  height: 75px; // Set the Appropriate Height
  visibility: hidden; 
}