LoveIt/assets/css/_partial/_single/_toc.scss

#toc-auto {
  display: block;
  position: absolute;
  width: 100%;
  max-width: 1000px;
  margin-left: 1000px;
  padding: 0 .8rem;
  border-left: 1px solid $global-border-color;
  overflow-wrap: break-word;
  box-sizing: border-box;
  top: if($header-normal-mode-desktop, 5rem, 10rem);

  .dark-theme & {
    border-left: 1px solid $global-border-color-dark;
  }

  .toc-title {
    font-weight: 400;
    margin: .8rem 0;
    text-transform: uppercase;
  }

  .toc-content {
    &.always-active ul {
      display: block;
    }

    >nav>ul {
      margin: .625rem 0;
    }

    ul {
      text-indent: -0.85rem;
      padding-left: .625rem;
      list-style: none;

      a::before {
        content: "|";
        font-weight: bolder;
        margin-right: .5rem;
        color: $single-link-color;

        .dark-theme & {
          color: $single-link-color-dark;
        }
      }

      ul {
        padding-left: 1.25rem;
        display: none;
      }

      .has-active > ul {
        display: block;
      }
    }

    a.active {
      font-weight: bold;
      color: $single-link-color;

      .dark-theme & {
        color: $single-link-color-dark;
      }

      &::before {
        color: $single-link-hover-color;

        .dark-theme & {
          color: $single-link-hover-color-dark;
        }
      }
    }
  }
}

#toc-static {
  display: none;
  padding-top: .8rem;

  details {
    summary {
      .toc-title {
        display: block;
        display: flex;
        justify-content: space-between;
        font-weight: bold;
        line-height: 2em;
        padding: 0 .625rem;
        background: $code-background-color;

        i.details {
          line-height: 2em;
        }

        .dark-theme & {
          background: $code-background-color-dark;
        }
      }

      &::-webkit-details-marker {
        display: none;
      }
    }
  }

  details[open] {
    i.details {
      transform: rotate(180deg);
    }
  }

  .toc-content {
    border: 2px solid $code-background-color;

    >nav>ul {
      margin: .625rem 0;
    }

    ul {
      padding-left: .625rem;
      list-style: none;

      ul {
        padding-left: 1.25rem;
      }
    }

    .dark-theme & {
      border: 2px solid $code-background-color-dark;
    }
  }
}

.toc {
  .toc-title {
    font-size: $toc-title-font-size;
  }

  .toc-content {
    font-size: $toc-content-font-size;
  }

  ruby {
    background: $code-background-color;

    rt {
      color: $global-font-secondary-color;
    }

    .dark-theme & {
      background: $code-background-color-dark;

      rt {
        color: $global-font-secondary-color-dark;
      }
    }
  }
}