ant-design/style/components/select.less

@selectPrefixCls: rc-select;

//mixin
.selection__clear(){
  cursor: pointer;
  float: right;
  font-weight: bold;
}

.@{selectPrefixCls} {
  box-sizing: border-box;
  display: inline-block;
  margin: 0;
  position: relative;
  vertical-align: middle;
  color: #666;
  font-size: @font-size-base;

  ul, li {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  > ul > li > a {
    padding: 0;
    background-color: #fff;
  }

  // arrow
  &-arrow {
    height: 26px;
    position: absolute;
    top: 1px;
    right: 1px;
    width: 20px;
    b {
      border-color: #999999 transparent transparent transparent;
      border-style: solid;
      border-width: 5px 4px 0 4px;
      height: 0;
      left: 50%;
      margin-left: -4px;
      margin-top: -2px;
      position: absolute;
      top: 50%;
      width: 0;
    }
  }

  &-selection {
    outline: none;
    user-select: none;
    -webkit-user-select: none;

    box-sizing: border-box;
    display: block;

    background-color: #fff;
    border-radius: 6px;
    border: 1px solid #d9d9d9;
    &:hover {
      border-color: #23c0fa;
    }
    &:active {
      border-color: #2db7f5;
    }
  }

  &-selection--single {
    height: 28px;
    cursor: pointer;

    .@{selectPrefixCls}-selection__rendered {
      display: block;
      overflow: hidden;
      text-overflow: ellipsis;
      padding-left: 10px;
      padding-right: 20px;
      line-height: 28px;
    }

    .@{selectPrefixCls}-selection__clear {
      .selection__clear();
    }
  }

  &-selection--multiple {
    min-height: 32px;
    cursor: text;

    .@{selectPrefixCls}-selection__rendered {
      display: inline-block;
      overflow: hidden;
      text-overflow: ellipsis;
      padding-left: 8px;
    }

    .@{selectPrefixCls}-selection__clear {
      .selection__clear();
      margin-top: 5px;
      margin-right: 10px;
    }

    .@{selectPrefixCls}-selection__choice {
      background-color: #f3f3f3;
      border-radius: 4px;
      cursor: default;
      float: left;
      margin-right: 4px;
      margin-top: 4px;
      padding: 4px 8px;
    }

    .@{selectPrefixCls}-selection__choice__remove {
      color: #919191;
      cursor: pointer;
      display: inline-block;
      font-weight: bold;
      padding: 0 0 0 8px;
      &:hover {
        color: #333;
      }
    }
  }

  &-search--inline {
    float: left;

    .@{selectPrefixCls}-search__field {
      border: none;
      font-size: 100%;
      margin-top: 5px;
      background: transparent;
      outline: 0;
    }
    > i {
      float: right;
    }
  }


  &-dropdown {
    display: none;
    background-color: white;
    border: 1px solid #d9d9d9;
    box-shadow: 0 0px 4px #d9d9d9;
    border-radius: 4px;
    box-sizing: border-box;
    width: 100%;
    z-index: 100;
    //border-top: none;
    //border-top-left-radius: 0;
    //border-top-right-radius: 0;
    position: absolute;
    top: 100%;
    margin-top: 4px;
    outline: none;
    .@{selectPrefixCls}-menu-item[aria-selected=true] {
      background-color: #ddd;
    }
  }

  &-search--dropdown {
    display: block;
    padding: 4px;
    .@{selectPrefixCls}-search__field {
      padding: 4px;
      width: 100%;
      box-sizing: border-box;
      border: 1px solid #d9d9d9;
      border-radius: 4px;
      outline: none;
    }
    &.@{selectPrefixCls}-search--hide {
      display: none;
    }
  }

  &-open {
    .@{selectPrefixCls}-arrow b {
      border-color: transparent transparent #888 transparent;
      border-width: 0 4px 5px 4px;
    }
    .@{selectPrefixCls}-dropdown {
      display: block;
    }

    .@{selectPrefixCls}-selection {
      //border-bottom-left-radius: 0;
      //border-bottom-right-radius: 0;
    }
  }

  &-menu {
    outline: none;
    margin-bottom: 0;
    padding-left: 0; // Override default ul/ol
    list-style: none;
    z-index: 9999;
    max-height: 250px;
    overflow: auto;

    > li {
      margin: 0;
      padding: 0;
    }

    & > &-item {
      position: relative;
      display: block;
      padding: 7px 10px;
      font-weight: normal;
      color: #666666;
      white-space: nowrap;

      &:hover, &-active, &-selected {
        background-color: rgba(142, 200, 249, 0.1) !important;
      }

      &-disabled {
        color: #ccc;
        cursor: not-allowed;
        pointer-events: none;

        &:hover {
          color: #ccc;
          background-color: #fff;
          cursor: not-allowed;
        }
      }

      &-divider {
        height: 1px;
        margin: 1px 0;
        overflow: hidden;
        background-color: #e5e5e5;
        line-height: 0;
      }
    }
  }
}