Search icon, search font color, search result issues

We used demo 2 and here is the problem: When click on search icon on the header menu, the search bar show up: 1. When typing, we couldn't see the text because the text is white color on white background. 2. The search results only show the tiles with no images, could it show the images, tiles of the courses as the search bar on home page can do? I tried css from other topics but they didn't work. Could you help us please? Thank you.