Slider adjustment, background colour and Nav bar


I need some help to adjust a slider.

I have two main problems. 1: is that a grey area appears on the sides or below (mobile version) my image. How can I remove that ? 2: I would like the nav bar (dots) to sit below the image. What is the best way to do that?

Here is my site Read-Only: Webflow - Jonas Dahlberg

Here is my site: