Vertical stack | Templating

[charles-moody]

A request of confirmation if this really can't be done, suits better here than HA forums as you're the dev - quick and short:

Wiki:

NOTE: card-mod only works on cards that contain a ha-card element. This includes almost every card which can be seen, but not e.g. conditional, entity_filter, vertical-stack, horizontal-stack, grid.

I have the ha-card, but within a vertical stack:

I'm using the minimalist-desktop-theme which already uses the card-mod and added:
# theme-css-mods card-mod-theme: "minimalist-desktop" card-mod-view-yaml: | "*:first-child$": | #columns .column > * { padding-left: 5px; padding-right: 5px; padding-bottom: 5px; } **# theme-css-usermods** card-mod-root-yaml: | .type-custom-simple-thermostat header .heating .header__title { color: red !important; }

Does not work; I have it working the standard way/on the card but it's not maintainable with 30-40 card per view.

Do I implement it wrong or is it simply not working with vertical-stack? (Therefor asking at the source)