Single Featured on front page

Hi, I would like to have one Featured listing to appear on my homepage in a small box.
I used this shortcode:

[acadp_listings listings_per_page=1 filterby=featured orderby=date header=0 category_id= pagination=0]

which works but the listing is condensed into a 33% space.
I altered the css to:

.acadp .col-md-4 {
width: 100% !important;
}

but this messes up the All Business Listings page layout, shows 1 listing the width of the screen. I want to keep the layout to a grid format on this page.

Can you help please?
Thanks

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