Is there a way to remove white block and make the bottombar transparent?

Hi everyone,

I’m creating my very first website with WordPress and I really would love to make the bottombar transparent, that is, I want my background image to show up instead of the “white block”.

I’ve been able to make it a bit translucent by adding e.g. opacity: 0.7;
but nothing else seem to work.

For example I’ve tried adding this in the style.css
#bottombar {
margin-top: 20px;
padding: 10px 0;
border-top: 2px solid #ddd;
background-image:url(‘https://ce-computereducation.esy.es/wp-content/uploads/2014/11/result_ultimat.jpg’);
background-color:transparent !important; //Added by me
background-repeat:repeat-x; //By me
clear:both; //By me
}

I’m relatively new to CSS so I’m not sure whether I’m trying to modify the wrong element?

The website adress is: https://ce-computereducation.esy.es

I would love to get some valuable tips,

Regards,
Carolina