How to make your Divi 4.0 header fixed or sticky - Quora
fritzthecat-blog: CSS Width 100% and Position Absolute or Fixed
Position - Programmer Sought
Position fixed, menù fisso nella pagina, fixed position
How to use position fixed in CSS | SkillForge
Creating Fixed Headers with CSS - CSS Reset
Visual formatting model
relative to which origin the position value is positioned - Programmer Sought
Reappear fixed position element - Stack Overflow
change css position to fixed on a created canvas with js - Stack Overflow
If the fixed positioning in CSS only gives the positioning mode position: fixed, the problem caused by the edge displacement is not given - Programmer Sought