Grid Card Title

Hello Experts - How can I change the Lovelace Grid Card title font size?

Use card-mod.

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Looks like card-mod does not work with the grid card.

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

Anybody got any success with altering the title font size in a grid card ?

It will work on the cards you put in the grid though.

Bumping this up. Curious if there is any way to style a h1.card-header that is in a grid? I know about card mod, but since that doesn’t work on grids & it’s not on the cards in the grid if there is anyway to do it? Thanks!

Card-mod can be used to style grid itself (incl. header). Place grid into mod-card.
There are examples in the main card-mod thread.