@sidebar-nav-prefix: ~'.sidebar-nav';
@sidebar-nav-arrow-width: 10px;

@{sidebar-nav-prefix} {
  display: block;
  margin: 0;
  padding: 0;
  font-size: @lxlib-default-aside-nav-fs;

  &__item {
    position: relative;
    display: flex;
    flex-direction: column;
    border-left: 3px solid transparent;
    transition: border-left-color 0.4s ease;

    &-link {
      position: relative;
      display: block;
      padding: @lxlib-default-aside-nav-padding-top-bottom @lxlib-default-aside-nav-padding-left-right * 2
        @lxlib-default-aside-nav-padding-top-bottom @lxlib-default-aside-nav-padding-left-right;
      overflow: hidden;
      color: @lxlib-default-aside-nav-text-color;
      white-space: nowrap;
      text-decoration: none !important;
      text-overflow: ellipsis;
      user-select: none;

      &:hover {
        color: @lxlib-default-aside-nav-text-hover-color;
      }
    }

    &-icon {
      display: inline-block;
      min-width: @lxlib-default-aside-nav-icon-width;
      margin-right: @layout-gutter;
      transition: font-size 0.15s @ease-out, margin 0.3s @ease-in-out;
    }

    &-img {
      width: @lxlib-default-aside-nav-img-wh;
      height: @lxlib-default-aside-nav-img-wh;
    }

    &-text {
      opacity: 1;
      transition: opacity 0.3s @ease-in-out, width 0.3s @ease-in-out;
    }

    &-disabled {
      cursor: default;
      opacity: 0.6;

      &:hover {
        color: @lxlib-default-aside-nav-text-color;
      }
    }
  }

  // Selected
  &__selected {
    background-color: @lxlib-default-aside-nav-selected-bg;
    border-left-color: @lxlib-default-aside-nav-selected-text-color;

    > @{sidebar-nav-prefix}__item-link {
      color: @lxlib-default-aside-nav-selected-text-color;
    }
  }

  // Open Submenu
  &__open {
    > @{sidebar-nav-prefix}__sub {
      display: block;
      animation: fadeIn 0.5s;
    }

    > @{sidebar-nav-prefix}__item-link {
      @{sidebar-nav-prefix}__sub-arrow {
        transform: translateY(-2px);

        &::before {
          transform: rotate(45deg) translateX(2px);
        }

        &::after {
          transform: rotate(-45deg) translateX(-2px);
        }
      }
    }
  }

  &__group-title {
    padding: @lxlib-default-aside-nav-padding-top-bottom @layout-gutter * 2;
    color: @lxlib-default-aside-nav-group-text-color;
  }

  &__sub {
    display: none;
    overflow: hidden;

    @{sidebar-nav-prefix}__item {
      border-left: 0 !important;
    }

    &-arrow {
      position: absolute;
      top: 50%;
      right: @lxlib-default-aside-nav-padding-left-right;
      width: @sidebar-nav-arrow-width;
      transition: transform 0.3s @ease-in-out;

      &::before,
      &::after {
        position: absolute;
        width: 6px;
        height: 1.5px;
        background: #fff;
        background-image: linear-gradient(to right, @menu-item-color, @menu-item-color);
        border-radius: 2px;
        transition: background 0.3s @ease-in-out, transform 0.3s @ease-in-out, top 0.3s @ease-in-out;
        content: '';
      }

      &::before {
        transform: rotate(-45deg) translateX(2px);
      }

      &::after {
        transform: rotate(45deg) translateX(-2px);
      }
    }
  }

  // Badge
  .badge {
    position: absolute;
    right: @layout-gutter * 2;
    @badge-height: @layout-gutter * 2;

    &:not(.badge-dot) {
      top: (@lxlib-default-aside-nav-item-height - @badge-height) / 2;
      height: @badge-height;
      padding: 0 4px;
      overflow: hidden;
      line-height: @badge-height;
    }

    &-dot {
      top: (@lxlib-default-aside-nav-item-height - @layout-gutter) / 2;
    }
  }

  // Dept
  &__depth1 {
    @{sidebar-nav-prefix}__item-link {
      padding-left: @lxlib-default-aside-nav-depth1-padding-left + @lxlib-default-aside-nav-icon-width;
    }
  }

  &__depth2 {
    @{sidebar-nav-prefix}__item-link {
      padding-left: @lxlib-default-aside-nav-depth2-padding-left + @lxlib-default-aside-nav-icon-width;
    }
  }

  &__depth3 {
    @{sidebar-nav-prefix}__item-link {
      padding-left: @lxlib-default-aside-nav-depth3-padding-left + @lxlib-default-aside-nav-icon-width;
    }
  }

  &__depth4 {
    @{sidebar-nav-prefix}__item-link {
      padding-left: @lxlib-default-aside-nav-depth4-padding-left + @lxlib-default-aside-nav-icon-width;
    }
  }

  // Floating
  &__floating {
    position: absolute;
    z-index: @zindex + 7;
    display: none;
    min-width: 160px;
    background-color: @lxlib-default-aside-bg;
    border: 1px solid @lxlib-default-content-heading-border;
    border-radius: 4px;

    @{sidebar-nav-prefix}__item {
      &-link {
        padding-left: @layout-gutter * 2;
      }
    }

    &-show {
      display: block;
    }

    @{sidebar-nav-prefix}__sub {
      display: block;

      &-arrow {
        display: none;
      }
    }

    // Dept
    @{sidebar-nav-prefix}__depth2 {
      @{sidebar-nav-prefix}__item-link {
        padding-left: @layout-gutter * 3;
      }
    }

    @{sidebar-nav-prefix}__depth3 {
      @{sidebar-nav-prefix}__item-link {
        padding-left: @layout-gutter * 4;
      }
    }

    @{sidebar-nav-prefix}__depth4 {
      @{sidebar-nav-prefix}__item-link {
        padding-left: @layout-gutter * 5;
      }
    }
  }
}

@media (min-width: @mobile-min) {
  @{lxlib-default-prefix}__collapsed {
    @{sidebar-nav-prefix}:not(@{sidebar-nav-prefix}__sub) {
      @{sidebar-nav-prefix}__item {
        border: none;

        &-link {
          display: flex;
          justify-content: center;
          padding: (@layout-gutter * 3) 0;

          @{sidebar-nav-prefix}__item-icon {
            margin-right: 0;
            font-size: @lxlib-default-aside-collapsed-nav-fs;
          }

          @{sidebar-nav-prefix}__item-img {
            width: @lxlib-default-aside-collapsed-nav-img-wh;
            height: @lxlib-default-aside-collapsed-nav-img-wh;
          }

          @{sidebar-nav-prefix}__item-text {
            display: none;
            opacity: 0;
          }
        }
      }

      @{sidebar-nav-prefix}__group-title {
        display: none;
      }
    }

    @{sidebar-nav-prefix} {
      &__sub {
        display: none !important;

        &-arrow {
          display: none;
        }
      }
    }
  }
}