Alan @ 02/05/19 9:00 PM
this is why suddenly?
Um, well, I'm certainly not a web designer, but I remember the basic things - css itself is called cascading, which cascading overlaps - first, the built-in styles, then you can override them with a css file. If for example the css file is empty at all, they remain embedded. And do not suddenly change to some other.
Browsers work like this, AFAIK.