Can’t find a way to change font size or background colour

[ic-dev21]

Describe the bug I tried to use compact mode but everything is off center and no settings seem to work.

I’d like the card background to turn orange when heating.

To Reproduce Copy the compact example

Expected behavior I’d like smaller fonts and things to be lined up correctly

# The least ammount of code possible to reproduce my error

type: custom:simple-thermostat
style: |
  ha-card {
    --st-font-size-xl: 20px;
    --st-font-size-m: 16px;
    --st-font-size-title: 16px;
    --st-font-size-sensors: 26px;
    --st-spacing: 0px;
    --st-mode-active-background: 
  }
entity: climate.thermostat_cuisine
layout:
  step: row 0
  mode:
    headings: false
    names: false
    icons: false
    labels: false
header: true
control: false

Screenshots Always include a screenshot

Browser

• OS: iOs
• Browser: app
• Simple Thermostat version from browser console: latest
• Home Assistant version: latest