CSS for Blossom Posts Category Slider

Hi there!

I’m trying to set the css for Blossom Posts Category Slider but i’m unable to, because after refreshing the page the item changes, can someone help?

I mainly want to remove the background and lower the top and bottom margin, because the default has some weird background color and the padding is very large…

Here is an example os the default Blossom Posts Category Slider:
https://imgur.com/a/N5Ua9IO

I found this:

sync1-70 {
.item {
    background: #0c83e7;
    padding: 80px 0;
    margin: 5px;
    color: #FFF;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
    text-align: center;
}
}

I’m just changing these settings:
background: transparent;
padding: 10px 0;

That works, however when i refresh the page, sync1-70 changes to a random sync1-x and i loose the settings…

Thanks!

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