Thank you waylaid. That works perfect from 870 onwards now. However, anything narrower than 870 the bar gets pushed under the logo and disappears on a mobile (getting my head around media queries has been a battle for me!).
@JohnMac4 Thank you so much for reply.
Yes I had a feeling my structure is all messy. I was trying to overwrite an existing style sheet in child theme without going into the html/php structure ‘cos that scares me (relative newbie!). But I guess I have to give it a shot.
If you had the code handy there without too much trouble that’d be really great.