Add display: none; to the existing properties for .stickyHeaderSpacer in site-theme.css

To make a row span the full height of the browser window use the vh (viewport height) value. Note: this will not account for other rows above the fold i.e. header & nav rows.

[SELECTOR] {
height: 100vh;
min-height: 500px;
}

min-height should be set to ensure the row cannot shrink to less than the height of it's children.

To make a row span the full height of the browser window minus the height of other rows, combine the calc() value with vh.

[SELECTOR] {
height: calc(100vh - 100px);
min-height: 500px;
}

The pixel value being taken away from the height should equal the height of all other rows to be considered i.e. header & nav rows.