Edited: Good points (0 pixel, 95vh vs 99vh).
At closer look I realize now that the container is contained.
I got a background color by adding an ID to SVG and set width 97%, and gave parent container a background color.
RbnJrg's cover code is certainly a unique 5-star solution.
His detailed description of how the cover functions (plus how to add background colors) in his next post is superb!
