.@{menu-prefix-cls} {
  // dark theme
  &_dark,
  &_dark &_sub {
    color: @menu-dark-color;
    background: @menu-dark-bg;
    .@{menu-prefix-cls}-submenu__title .@{menu-prefix-cls}-submenu__arrow {
      opacity: .45;
      transition: all .3s;
      &:after,
      &:before {
        background: @menu-dark-arrow-color;
      }
    }
  }

  &_dark&-submenu-popup {
    background: transparent;
  }

  &_dark &_inline&_sub {
    background: @menu-dark-submenu-bg;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .45) inset;
  }

  &_dark&_horizontal {
    border-bottom-color: @menu-dark-bg;
  }

  &_dark&_horizontal > &__item,
  &_dark&_horizontal > &-submenu {
    border-color: @menu-dark-bg;
    border-bottom: 0;
  }

  &_dark &__item,
  &_dark &-item-group__title,
  &_dark &__item > a {
    color: @menu-dark-color;
  }

  &_dark&_inline,
  &_dark&_vertical,
  &_dark&_vertical-left,
  &_dark&_vertical-right {
    border-right: 0;
  }

  &_dark&_inline &__item,
  &_dark&_vertical &__item,
  &_dark&_vertical-left &__item,
  &_dark&_vertical-right &__item {
    border-right: 0;
    margin-left: 0;
    left: 0;
    &:after {
      border-right: 0;
    }
  }

  &_dark&_inline &__item,
  &_dark&_inline &-submenu__title {
    width: 100%;
  }

  &_dark &__item:hover,
  &_dark &__item_active,
  &_dark &-submenu_active,
  &_dark &-submenu_open,
  &_dark &-submenu_selected,
  &_dark &-submenu__title:hover {
    background-color: transparent;
    color: @menu-dark-highlight-color;
    > a {
      color: @menu-dark-highlight-color;
    }
    > .@{menu-prefix-cls}-submenu__title,
    > .@{menu-prefix-cls}-submenu__title:hover {
      > .@{menu-prefix-cls}-submenu__arrow {
        opacity: 1;
        &:after,
        &:before {
          background: @menu-dark-highlight-color;
        }
      }
    }
  }

  &_dark &__item_selected {
    border-right: 0;
    color: @menu-dark-highlight-color;
    &:after {
      border-right: 0;
    }
    > a,
    > a:hover {
      color: @menu-dark-highlight-color;
    }
  }

  &&_dark &__item_selected,
  &-submenu-popup&_dark &__item_selected {
    background-color: @menu-dark-item-selected-bg;
  }

  // Disabled state sets text to dark gray and nukes hover/tab effects
  &_dark &__item_disabled,
  &_dark &-submenu_disabled {
    &,
    > a {
      opacity: 0.8;
      color: @disabled-color-dark !important;
    }
    > .@{menu-prefix-cls}-submenu__title {
      color: @disabled-color-dark !important;
    }
  }
}