.sidebar {
  padding: 1.5rem 1.5rem 1.5rem 0; // no left padding on big screen
}

.sidebar-item {
  &:not(:last-child) {
    margin-bottom: 1rem; // space between sidebar items
  }

  h3 {
    margin-bottom: 0.25rem; // space between head3 & lists
  }

  ul {
    list-style-type: none;
    margin: 0 0.1rem; // little space
  }

  &>div,
  &>nav {
    margin: 0 0.1rem; // little space
  }

  &>img {
    margin: 0.5rem 0.25rem 0 0.25rem;
    width: 100%;
    border-radius: 2px;
  }
}

@media screen and (max-width: $width-md) {
  .sidebar {
    display: none !important;
  }
}

@media screen and (max-width: $width-md) {
  .sidebar-mobile {
    width: 70%;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0%;
    background-color: var(--color-codebg);
    padding: 1.5rem 4.5rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: space-around;
    z-index: 50;

    .sidebar-item {
      width: 90%; // max 1 module per line
      text-align: right;

      // space only at first 2 modules
      .sidebar-pages,
      .sidebar-tags {
        margin-bottom: 1rem;
      }

      .sidebar-links,
      .sidebar-bgm {
        margin-bottom: 0;
      }

      &>img {
        margin: 0.5rem 0.25rem 0 0.25rem;
        width: 75%;
        border-radius: 0.25rem;
      }
    }
  }
}

// single page part
.sidebar-toc {
  ul ul {
    font-size: 0.875rem;
    padding-left: 0.5rem;
    margin-bottom: 0.25rem;
  }

  position: sticky;
  top: 1rem;

  #TableOfContents {
    max-height: 32rem;
    overflow: auto;
    scrollbar-width: thin;
  }
}