Start slider at top of page slides under menu

Here’s the site I am working on: https://www.ikgroupfitness.com/

I am looking to get the image of the slider to start at the top of the page. I’ve done it unsuccessfully a few times but when I scroll all the way to the top the logo/menu disappeared. I am using CSS hero to edit CSS because I am VERY new to learning how to make websites. Any help with this would be much appreciated!!

Thank you!