.nut-pickerview {
  position: relative;
  display: flex;
  width: 100%;
  height: $picker-list-height;
  $pickerview-top: calc(($picker-list-height - $picker-item-height) / 2);
  overflow: hidden;

  &-mask,
  &-indicator {
    position: absolute;
    left: 0;
    right: 0;
    z-index: 3;
    pointer-events: none;
  }

  &-mask {
    top: 0;
    bottom: 0;
    background-image: $picker-mask-background;
    background-position: top, bottom;
    background-size: 100% $pickerview-top;
    background-repeat: no-repeat;
    transform: translateZ(0);
  }

  &-indicator {
    top: $pickerview-top;
    height: $picker-item-height;
    border: $picker-item-active-line-border;
    border-left: 0;
    border-right: 0;
    box-sizing: border-box;
  }

  &-list {
    position: relative;
    flex: 1;
    height: $picker-list-height;
    overflow: hidden;
    touch-action: none;
  }

  &-roller {
    position: absolute;
    top: $pickerview-top;
    width: 100%;
    height: $picker-item-height;
    z-index: 1;
    transform-style: preserve-3d;
    &-placeholder {
      height: $picker-item-height;
    }
  }

  &-roller-item {
    position: absolute;
    top: 0;
    backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    &-hidden {
      visibility: hidden;
      opacity: 0;
    }
  }

  &-roller-item,
  &-roller-item-tiled {
    width: 100%;
    height: $picker-item-height;
    line-height: $picker-item-height;
    color: $picker-item-text-color;
    font-size: $picker-item-text-font-size;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}