unity/resources/sass/user/components/sticky-elements/_sticky-elements.scss

// Sticky Elements

.scroll-area {
  overflow-y: auto;
  position: relative;
  height: 400px;
}

.scrollable-block {
  margin-bottom: 50px;
  overflow: hidden;
  position: relative;
  .sticky {
    z-index: 2;
  }
}