amis/packages/amis-ui/scss/components/_picker-columns.scss

.#{$ns}PickerColumns {
  position: relative;
  background-color: var(--PickerColumns-bg);
  user-select: none;
  flex: 1;
  overflow: hidden;
  font-size: var(--PickerColumns-option-fontSize);

  li:focus {
    outline: none;
  }

  &-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--PickerColumns-toolbar-height);
  }

  &-cancel,
  &-confirm {
    height: 100%;
    padding: var(--PickerColumns-action-padding);
    font-size: var(--PickerColumns-action-fontSize);
    background-color: transparent !important;
    border: none;
    cursor: pointer;

    &:active {
      background-color: none !important;
    }
    &:hover {
      background-color: none !important;
    }
  }

  &-confirm {
    color: var(--PickerColumns-confirmAction-color);
  }

  &-cancel {
    color: var(--PickerColumns-cancelAction-color);
  }

  &-title {
    max-width: 50%;
    font-weight: 500;
    font-size: var(--PickerColumns-title-fontSize);
    line-height: var(--PickerColumns-title-lineHeight);
    text-align: center;
    color: var(--PickerColumns-title-color);
  }

  &-columns {
    touch-action: none;
    position: relative;
    display: flex;
    cursor: grab;
  }

  &-loading {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--PickerColumns-loadingIcon-color);
    background-color: var(--PickerColumns-loadingMask-color);
  }

  &-frame {
    position: absolute;
    top: 50%;
    right: var(--gap-md);
    left: var(--gap-md);
    z-index: 2;
    transform: translateY(-50%);
    pointer-events: none;

    &::after {
      position: absolute;
      content: '';
      border-bottom: 1px solid var(--borderColor);
      border-top: 1px solid var(--borderColor);
      top: -50%;
      right: -50%;
      left: -50%;
      bottom: -50%;
      transform: scale(0.5);
    }
  }

  &-mask {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(
        180deg,
        hsla(0, 0%, 100%, 0.9),
        hsla(0, 0%, 100%, 0.4)
      ),
      linear-gradient(0deg, hsla(0, 0%, 100%, 0.9), hsla(0, 0%, 100%, 0.4));
    background-repeat: no-repeat;
    background-position: top, bottom;
    transform: translateZ(0);
    pointer-events: none;
  }

  &-columnWrapper {
    margin: 0;
    padding: 0;
    list-style: none;
    transition-timing-function: cubic-bezier(0.23, 1, 0.68, 1);
  }

  &-columnItem {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--PickerColumns-optionText-color);
  }
  &-columnItem.is-disabled {
    cursor: not-allowed;
    opacity: var(--PickerColumns-optionDisabled-opacity);
  }

  &-columnItemis-selected {
    font-size: 18px;
    color: --PickerColumns-title-color;
  }
}