The area with the filter selection (gastro/retail/...) should be on top of the map, so that there's no grey space on the side (as it is on the current version on https://veganaut.net/map/). The filter area can also be on top of the map in the mobile view, no need to change the area of the map depending on the screen size.
The content in the bottom bar should be limited to the same width as the filter area (this should fix that the "Add" buttton disappears on too big screens).
The bar itself however can stay as wide as it is, to extend to the full width of the page. The bar is a slightly different shade of white on the left side, it should have the same colour everywhere.
The desktop view of the map needs to be improved: