Reduce font size in general on lovelace

I know there has been a lot of Questions here jet, but I am stuck.

I want to reduce the Font size of all Text in lovelace e.g. to 70%.

Some text does not fit into the buttons I use, esp. on mobile.

Furthermore Sensor and Switch Status have differen font sizes (see “sonne” in attached pic).

Where do I have do insert something like “font_size: 70%” ?

Code:

cards:
  - show_name: true
    show_icon: true
    entity: switch.taster_rollo_ez_fenster_senken
    hold_action:
      action: more-info
    icon: mdi:arrow-down-bold
    name: EZ
    type: entity-button
  - show_name: true
    show_icon: true
    entity: switch.taster_rollo_ez_fenster_heben
    hold_action:
      action: more-info
    icon: mdi:arrow-up-bold
    name: Fenster
    type: entity-button
  - type: button
    tap_action:
      action: more-info
    entity: switch.automatik_esszimmerfenster
    show_name: false
    hold_action:
      action: toggle
  - entity: sensor.zustand_ez_fenster
    name: Status
    type: entity-button
    show_name: false
    show_state: true
  - show_name: true
    show_icon: true
    type: button
    tap_action:
      action: toggle
    entity: switch.sonneneingang_eg_ez_fenster
    name: Sonne
  - show_name: true
    show_icon: true
    type: button
    tap_action:
      action: toggle
    entity: switch.behang_eg_ez_fenster_senken
    name: down
  - show_name: true
    show_icon: true
    type: button
    tap_action:
      action: toggle
    entity: switch.behang_eg_ez_fenster_heben
    name: up
type: horizontal-stack