standardnotes-app-web/app/assets/stylesheets/_navigation.scss

@import './scrollbar';

#navigation .scrollable {
  @include minimal_scrollbar();
  height: 100%;
}

$content-horizontal-padding: 16px;

#navigation {
  user-select: none;
  -moz-user-select: none;
  -khtml-user-select: none;
  -webkit-user-select: none;

  &,
  #navigation-content {
    display: flex;
    flex-direction: column;
    background-color: var(--sn-stylekit-secondary-background-color);
  }

  .section-title-bar {
    color: var(--sn-stylekit-secondary-foreground-color);
    padding-top: 0.8125rem;
    padding-bottom: 8px;
    padding-left: $content-horizontal-padding;
    padding-right: $content-horizontal-padding;
    font-size: 12px;
  }

  .no-tags-placeholder {
    padding: 0px $content-horizontal-padding;
    font-size: 12px;
    opacity: 0.4;
    margin-top: -5px;
  }

  .root-drop {
    width: '100%';
    padding: 12px;
    opacity: 0;
    transition: opacity 0.3s ease-in;

    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;

    .sn-icon {
      margin-right: 0.5rem;
    }

    &.active {
      opacity: 1;

      &.is-over {
        background-color: var(--sn-stylekit-white);
        color: var(--sn-stylekit-secondary-contrast-foreground-color);
      }
    }
  }

  .tag {
    border: 0;
    background-color: transparent;

    &:focus {
      background-color: var(--sn-stylekit-secondary-contrast-background-color);
    }
  }

  .tag,
  .root-drop {
    font-size: 14px;
    line-height: 18px;

    min-height: 29px;
    padding: 5px 14px;
    cursor: pointer;
    transition: height 0.1s ease-in-out;
    position: relative;

    > .tag-info {
      display: flex;
      flex-direction: row;
      align-items: center;
      justify-content: space-between;

      .sn-icon {
        display: block;
        margin: 0 auto;
      }

      .tag-fold {
        min-width: 22px;
        display: flex;
        align-items: center;
        height: 100%;

        @extend .border-0;
        @extend .bg-transparent;
        @extend .p-0;
      }

      > .tag-icon {
        display: flex;
        align-items: center;
        height: 100%;

        &.draggable {
          cursor: move;
        }

        &.propose-folders {
          cursor: help;
        }
      }

      > .title {
        @extend .focus\:outline-none;
        @extend .focus\:shadow-none;
        font-size: 14px;
        line-height: 18px;

        width: 80%;
        background-color: transparent;
        font-weight: 600;
        color: var(--sn-stylekit-secondary-foreground-color);
        border: none;
        cursor: pointer;
        text-overflow: ellipsis;
        width: 75%;
        flex-grow: 1;

        // Required for Safari to avoid highlighting when dragging panel resizers
        // Make sure to undo if it's selected (for editing)
        user-select: none;
        -moz-user-select: none;
        -khtml-user-select: none;
        -webkit-user-select: none;

        pointer-events: none;

        &.editing {
          pointer-events: auto;
          user-select: text;
          -moz-user-select: text;
          -khtml-user-select: text;
          -webkit-user-select: text;
        }

        &:focus {
          outline: 0;
          box-shadow: 0;
        }
      }

      .count {
        padding-right: 4px;
        padding-top: 1px;
        font-weight: bold;
        color: var(--sn-stylekit-neutral-color);
        min-width: 15px;
        text-align: right;
      }
    }

    .meta {
      padding-left: 3px;

      &.with-folders {
        padding-left: 25px;
      }

      > .menu {
        font-size: 11px;

        > .item {
          margin-right: 4px;
        }

        opacity: 0.5;
        font-weight: bold;
        clear: both;
        margin-top: 2px;
        margin-bottom: 2px;

        &:hover {
          opacity: 1;
        }
      }
    }

    &.selected {
      > .tag-info {
        .title {
          cursor: text;
        }
      }
    }

    &:hover:not(.selected),
    &.selected,
    &.is-drag-over {
      background-color: var(--sn-stylekit-secondary-contrast-background-color);
      color: var(--sn-stylekit-secondary-contrast-foreground-color);

      > .title {
        color: var(--sn-stylekit-secondary-contrast-foreground-color);
      }
    }
  }
}