CSS h3 large-text issue

Hey all. Been using Blocs for a few years, but this is the first thing that’s properly stumped me…

Sure it was working fine before, but I’m having an issue with font weight styling being overridden by I assume some clever bootstrap business.

My styled headings use H3 and have a weight of 800 but they’re now looking very light and small. When I inspect in the browser the size and weight rules of H3 are being over-ridden by this h3, .large-text which is set as a font weight 400 and size 2.4. The css location points to https://static-exp1.licdn.com/sc/h/bvct6szbjq1lhkmq97l688bk8.

I can’t work out how to override it so my styling is applied to H3. I could go through and try giving them all a new custom style, but I want to avoid it - it’s was working fine previously.

Any help greatly appreciated