Sticky widgets

Hi team,

how to make particular widgets sticky but not the whole sidebars.

@media (min-width: 769px) {
    .site-content {
        display: flex;
    }
    .inside-right-sidebar {
        height: 100%;
    }
    .inside-right-sidebar aside:last-child {
        position: -webkit-sticky;
        position: sticky;
        top: 50px;
    }
}

That is the code that i added to my website but it just works on the right sidebar. I want the search bar (on the left sidebar to be sticky as well)

website link in the private information section :)

Please help.