index.less

.rc-input {
  &-out-of-range {
    color: red;
  }

  &-affix-wrapper {
    padding: 2px 8px;
    overflow: hidden;
    border: 1px solid lightgray;
    border-radius: 2px;

    &:hover,
    &:focus-within {
      border-color: #000;
    }

    input {
      padding: 0;
      border: none;
      outline: none;
    }
  }

  &-clear-icon {
    padding: 0;
    font-size: 12px;
    background: none;
    border: none;

    &-hidden {
      display: none;
    }
  }
}