ant-design/components/menu/style/index.less

@import "../../style/themes/default";
@import "../../style/mixins/index";

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

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

  &-hidden {
    display: none;
  }

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

  &-item-group-title {
    color: @text-color-secondary;
    font-size: @font-size-base;
    line-height: 1.5;
    padding: 8px 16px;
  }

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

  &-submenu &-sub {
    cursor: initial;
  }

  &-item > a {
    display: block;
    color: @text-color;
    &:hover {
      color: @text-color;
    }
    &:before {
      position: absolute;
      background-color: transparent;
      width: 100%;
      height: 100%;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      content: '';
    }
  }

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

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

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

  &-item-selected {
    color: @primary-color;
    // fix chrome render bug
    transform: translateZ(0);
    > a,
    > a:hover {
      color: @primary-color;
    }
  }

  &-horizontal,
  &-inline,
  &-vertical {
    z-index: auto;
  }

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

  &-vertical &-sub {
    border-right: 0;
    .@{menu-prefix-cls}-item {
      border-right: 0;
    }
  }

  &-inline {
    .@{menu-prefix-cls}-selected,
    .@{menu-prefix-cls}-item-selected {
      border-right: 2px solid @primary-color;
      transform: translateZ(0);
    }
  }

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

  &-submenu-vertical {
    z-index: 1;
  }

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

  &-item,
  &-submenu-title {
    margin: 0;
    padding: 0 20px;
    position: relative;
    display: block;