Looks like you’ll want to use .sticky .inside-article
instead of just .sticky
(or use !important
😬 ). This is because you have the following rule further down in your stack setting the background on the .inside-article
to white overriding that of the outer .sticky
container.
separate-containers .inside-article, .separate-containers .comments-area, .separate-containers .page-header, .one-container .container, .separate-containers .paging-navigation, .inside-page-header {
background-color: #fff;
}