Custom CSS reverts back to default setting when page finishes loading

Describe the issue or problem
Please tell us what happens and what you expected to happen.

Dear all, I’ve looked around the forums but haven’t been able to find this, so hopefully I haven’t overlooked a simple solution. We have created a child theme from the default manuscript parent theme, and we are trying to stylise the css. We’ve created our own css document that is accessed in the head of the document (which might be the problem).

The css seems to be correct because it shows as exactly how we want it for about a second before it reverts back to the original as soon as the page finishes loading. Does anyone have any ideas about this? I’m far from an expert in OJS, and this is our first attempt at creating a child theme. We are using OJS

We’ve resolved this ourselves now. There haven’t been any replies, but I thought I’d better show this here to avoid any future responses.