Nav looks different in designer and preview + Slider resize on mobile

  1. Nav menu looks different in designer and preview (or published site). This issue makes it difficult to design in designer. Screenshots and link attached.

  1. Slider on second section doesn’t seem to size down any further past 320ish px, it’s overflowing from the container. I don’t remember setting a min-width so I don’t know why it behaves that way. It looks fine on >320 px so it’s not really a substantial problem but I’m just very curious.

Thank you in advance

Here is my site Read-Only: LINK
(how to share your site Read-Only link)