webapp/src/components/Feed/Sidebar.module.scss

.sidebar {
  max-height: calc(100vh - 120px);
  overflow: hidden;
  position: sticky;
  top: 120px;

  &:hover {
    overflow: scroll;
    padding-right: 1rem;
  }
}

.counter {
  @include font-size(1.2rem);

  align-items: center;
  align-self: flex-start;
  background: #f6f6f6;
  border-radius: 0.8rem;
  display: flex;
  font-weight: 500;
  padding: 0.2em 0.5em;
}

.unread {
  position: relative;

  &::after {
    background: #2638d9;
    border-radius: 100%;
    content: '';
    display: inline-block;
    height: 0.5em;
    left: 100%;
    margin-left: 0.3em;
    position: absolute;
    top: 0.5em;
    width: 0.5em;
  }
}

.settings {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2em;
}

a {
  img {
    transition: filter 0.3s;
  }

  &:hover {
    img {
      filter: invert(1);
    }
  }
}

.icon {
  display: inline-block;
  line-height: 1;
  height: 2rem;
  margin-right: 0.5em;
  vertical-align: middle;
  width: 2.2rem;

  img {
    height: 100%;
    object-fit: contain;
    object-position: center;
    width: 100%;
  }
}