vant/src/picker/index.less

@import '../style/var';

.van-picker {
  position: relative;
  background-color: @picker-background-color;
  user-select: none;
  -webkit-text-size-adjust: 100%; /* avoid iOS text size adjust */

  &__toolbar {
    display: flex;
    justify-content: space-between;
    height: @picker-toolbar-height;
    line-height: @picker-toolbar-height;
  }

  &__cancel,
  &__confirm {
    padding: @picker-action-padding;
    color: @picker-action-text-color;
    font-size: @picker-action-font-size;

    &:active {
      background-color: @picker-action-active-color;
    }
  }

  &__title {
    max-width: 50%;
    font-weight: 500;
    font-size: @picker-title-font-size;
    text-align: center;
  }

  &__columns {
    position: relative;
    display: flex;
  }

  &__loading {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, .9);
  }

  &__loading .van-loading,
  &__frame {
    position: absolute;
    top: 50%;
    left: 0;
    z-index: 3;
    width: 100%;
    transform: translateY(-50%);
    pointer-events: none;
  }

  &__mask {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(180deg, hsla(0, 0%, 100%, .9), hsla(0, 0%, 100%, .4)),
      linear-gradient(0deg, hsla(0, 0%, 100%, .9), hsla(0, 0%, 100%, .4));
    background-repeat: no-repeat;
    background-position: top, bottom;
    backface-visibility: hidden;
    pointer-events: none;
  }

  &-column {
    flex: 1;
    overflow: hidden;
    font-size: @picker-option-font-size;
    text-align: center;

    &__wrapper {
      transition-timing-function: cubic-bezier(0.23, 1, 0.68, 1);
    }

    &__item {
      padding: 0 5px;
      color: @picker-option-text-color;

      &--disabled {
        opacity: @picker-option-disabled-opacity;
      }
    }
  }
}