Put the slogan above the slider

Hi everybody,I wanted to put the slogan of my blog above the slideshow(Prestige Slider) in the Prestige Light theme.
this is the link of the site https://pontanotest.com/zooveritastest/
So,in the file “homepage.php”,I just moved the renderSlogan() function before the renderSlider() and it actually works.The problem is tha the slider now has a sort of background that I can’t undestand from where it came from and it’s not alligned with the image so it looks very bad.Even if I hide the slider,i can se this grey square under the content of the page.