Mobile menu and logo styles not picked up after child theme install

Hi,

I've just switched from using code snippets aand simple css to a GP child theme, as I needed some page templates.

Most of the CSS seems fine, but the logo is not showing on mobile (1280 and below).

I've checked your forums and can see this is because it's got a height set to 20px. I do have CSS for the height, but it's not being picked up. I had it in general styles, but have moved it to a media query - neither works, but were working fine before.

The mobile menu styles, also set in the stylesheet, are also not being picked up.

Smart Slider is also suddenly adding a left-hand space to the first slide, although slider settings are as before - not sure if this is related to the above though.

Thanks for your help.

All best,

Giselle