ant-design/style/components/menu.less

@menu-prefix-cls: ~"@{css-prefix}menu";

// default theme
.@{menu-prefix-cls} {
  outline: none;
  margin-bottom: 0;
  padding-left: 0; // Override default ul/ol
  list-style: none;
  z-index: 999;
  box-shadow: @overlay-shadow;
  color: @text-color;
  background: #fff;
  line-height: 46px;

  &-hidden {
    display: none;
  }

  &-item-group-list {
    margin: 0;
    padding: 0;
  }

  &-item-group-title {
    color: #999;
    line-height: 1.5;
    padding: 8px 10px;
    border-bottom: 1px solid #e9e9e9;
  }

  &-item,
  &-submenu,
  &-submenu-title {
    cursor: pointer;
    transition: all 0.3s ease;
  }


  &-item-active,
  &-submenu-title:hover {
    background-color: tint(@primary-color, 90%);
  }

  &-horizontal &-item,
  &-horizontal &-submenu {
    margin-top: -1px;
  }

  &-horizontal > &-item-active,
  &-horizontal > &-submenu &-submenu-title:hover {
    background-color: transparent;
  }

  &-item-selected {
    color: @primary-color;
  }

  &-inline,
  &-vertical {
    border-right: 1px solid #e9e9e9;
    .@{menu-prefix-cls}-item {
      border-right: 2px solid transparent;
      margin-left: -1px;
      left: 1px;
      position: relative;
      z-index: 1;
    }
  }

  &-inline {
    .@{menu-prefix-cls}-selected,
    .@{menu-prefix-cls}-item-selected {
      border-right: 2px solid @primary-color;
    }
  }

  &-submenu-horizontal > & {
    top: 100%;
    left: 0;
    position: absolute;
    min-width: 100%;
    margin-top: 7px;
  }

  &-submenu-vertical > & {
    top: 0;
    left: 100%;
    position: absolute;
    min-width: 160px;
    margin-left: 4px;
  }

  &-item,
  &-submenu-title {
    margin: 0;
    position: relative;
    display: block;
    white-space: nowrap;

    // Disabled state sets text to gray and nukes hover/tab effects
    &.@{menu-prefix-cls}-item-disabled, &.@{menu-prefix-cls}-submenu-disabled {
      color: #999 !important;
    }
  }
  & > &-item-divider {
    height: 1px;
    margin: 1px 0;
    overflow: hidden;
    padding: 0;
    line-height: 0;
    background-color: #e5e5e5;
  }

  &-submenu {
    position: relative;

    > .@{menu-prefix-cls} {
      background-color: #fff;
      border-radius: 4px;
    }

    &-vertical > .@{menu-prefix-cls}-submenu-title:after {
      font-family: "anticon" !important;
      font-style: normal;
      vertical-align: baseline;
      text-align: center;
      text-transform: none;
      text-rendering: auto;
      position: absolute;
      transition: transform .3s ease;
      content: "\e603";
      right: 16px;
      .ie-rotate(3);
      transform: rotate(270deg) scale(0.75);
    }

    &-inline > .@{menu-prefix-cls}-submenu-title:after {
      font-family: "anticon" !important;
      font-style: normal;
      vertical-align: baseline;
      text-align: center;
      text-transform: none;
      text-rendering: auto;
      position: absolute;
      transition: transform .3s ease;
      content: "\e603";
      right: 16px;
      top: 0;
      .iconfont-size-under-12px(8px);
    }

    &-open {
      &.@{menu-prefix-cls}-submenu-inline > .@{menu-prefix-cls}-submenu-title:after {
        .ie-rotate(1);
        transform: rotate(180deg) scale(0.75);
      }
    }
  }

  &-item,
  &-submenu-title {
    .anticon {
      width: 14px;
      margin-right: 8px;
    }
  }

  &-horizontal {
    border: none;
    border-bottom: 1px solid #e9e9e9;
    box-shadow: none;
    z-index: 0;

    > .@{menu-prefix-cls}-item,
    > .@{menu-prefix-cls}-submenu {
      padding: 0 20px;
      position: relative;
      top: 1px;
      float: left;
      border-bottom: 2px solid transparent;

      &-active,
      &-selected {
        border-bottom: 2px solid @primary-color;
        color: @primary-color;
      }

      > a {
        display: block;
        color: @text-color;
        &:hover {
          color: @primary-color;
        }
        &:before, &:after {
          position: absolute;
          background-color: transparent;
          width: 20px;
          height: 100%;
          content: '';
        }
        &:before {
          left: 0;
        }
      }
    }

    &:after {
      content: "\20";
      display: block;
      height: 0;
      clear: both;
    }
  }

  &-vertical, &-inline {
    & > .@{menu-prefix-cls}-item, & > .@{menu-prefix-cls}-submenu > .@{menu-prefix-cls}-submenu-title {
      padding: 0px 16px 0 28px;
      font-size: 12px;
      line-height: 42px;
      height: 42px;
    }
  }

  &-vertical&-sub {
    padding: 0;
    transform-origin: 0 0;
    & > .@{menu-prefix-cls}-item, & > .@{menu-prefix-cls}-submenu {
      transform-origin: 0 0;
    }
  }

  &-root&-vertical,
  &-root&-inline {
    box-shadow: none;
  }

  &-sub&-inline {
    padding: 0;
    border: none;
    box-shadow: none;
    border-radius: 0;
    & > .@{menu-prefix-cls}-item, & > .@{menu-prefix-cls}-submenu > .@{menu-prefix-cls}-submenu-title {
      line-height: 42px;
      height: 42px;
      list-style-type: disc;
      list-style-position: inside;
    }
  }
}


// dark theme
.@{menu-prefix-cls} {
  &-dark,
  &-dark &-sub {
    color: #999;
    background: #404040;
  }

  &-dark &-inline&-sub {
    background: #333;
  }

  &-dark&-horizontal {
    border-bottom-color: #404040;
  }

  &-dark&-horizontal > &-item,
  &-dark&-horizontal > &-submenu {
    border-bottom: 0;
    top: 0;
  }

  &-dark&-horizontal > &-item-active,
  &-dark&-horizontal > &-item-selected,
  &-dark&-horizontal > &-submenu:hover,
  &-dark&-horizontal > &-submenu &-submenu-title:hover {
    color: #fff;
  }

  &-dark &-item > a {
    color: #999;
    &:hover {
      color: #fff;
    }
  }

  &-dark&-inline,
  &-dark&-vertical {
    border-right: 0;
  }

  &-dark&-inline &-item,
  &-dark&-vertical &-item {
    border-right: 0;
    margin-left: 0;
    left: 0;
  }

  &-dark&-inline &-item-selected {
    border-right: 0;
    background-color: @primary-color;
    color: #fff;
  }

  &-dark &-item-active,
  &-dark &-submenu-title:hover {
    background-color: transparent;
    color: @primary-color;
  }
}