@hardikv , sure, I've marked your answer as a solution. Thanks again!
I'm confusing what I should change in CSS 😞
When I brows my portal and press F-12 I see the following code for the page:
The height of the block with the image in 420 px. But in my CSS there is no 420 (I tried to find it using search tool).
I guess I need to make changes into template, but I have 7 different templates for the search:
1) Faceted Search - Facets Template
2) Faceted Search - Main Template
3) Faceted Search - Paging Template
4) Faceted Search - Results Template
5) Faceted Search - Sort Template
6) Search
7) Search Results
Which one I should modify and how to have the height of the background picture as for an example 20 px?