Hello Ciaran,
I found some old threads of how to make the header image smaller on mobile and tried them but without luck.
On my clients testsite I want the header image be max 300px height.
I tried this in the responsive option with this code:
#container-header {
max-height: 300px !important;
}
This doesn't work so maybe you have the right code?
Thanks!
Greetings, Ton