form field and search-course-button overlap

Hi,

As you can see, the search field is overlapped by the search button on: https://www.business-wise.nl/cursussen/

When I open the inspector on this page and change ‘absolute’ (see below) in ‘relative’ it works … while in the inspector. But I cannot fix it when I use the new CSS in my theme….

form[name=”search-course”] .search-course-button {
position: absolute;
top: 1px;
right: 1px;
bottom: 1px;
padding: 15px;
height: auto;
line-height: 1px;
}

So, how to proceed from here?

Thanks in advance!
Eric

The page I need help with: [log in to see the link]