@import "../../variable.less";
@import "../../mixins/index.less";
@import "./var.less";

.@{--css-prefix}-tab {
  width: 100%;
  height: 100%;
  overflow: hidden;

  /* elements */
  &__item {
    flex: 1;
    padding: var(--spacing-v-lg) var(--spacing-h-lg) 0;
    color: var(--tab-color);
    font-size: var(--tab-font-size);
    text-overflow: ellipsis;
    overflow: hidden;

    &-content {
      display: inline-block;
    } 

    &-text {
      line-height: var(--line-height-base);
      font-size: var(--tab-font-size);
    }

    &-underline {
      margin-top: var(--tab-item-underline-space);
      width: 100%;
      height: var(--tab-line-height);
      background-color: var(--tab-color-active);
      transform: scaleX(0);
      transition: all 0.15s;
      border-radius: 3px;
    }
    &--active {
      color: var(--tab-color-active);
      font-weight: bold;

      .@{--css-prefix}-tab__item-underline {
        height: calc(var(--tab-line-height) * 2);
        transform: scaleX(1);
      }
    }
  }

  &__header {
    position: relative;
    display: flex;
    width: 100%;
    text-align: center;
    white-space: nowrap;
    // background-color: var(--tab-bg-color;
    box-sizing: border-box;
    overflow: -moz-scrollbars-none;

    &::-webkit-scrollbar {
      display: none;
      width: 0 !important;
      height: 0 !important;
      background: transparent;
    }
  }

  &__body {
    display: block;
    width: 100%;
    white-space: nowrap;
    transition: all 0.3s;
    will-change: transform, left, top;
    overflow: visible;
  }

  
  &__underline {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: auto;
    right: auto;
    width: 600%;
    height: var(--tab-line-height);
    background-color: var(--tab-underline-color);
  }

  /* modifiers */
  &--scroll {
    .@{--css-prefix}-tab__header {
      overflow-x: scroll;
      -webkit-overflow-scrolling: touch;
      white-space: nowrap;
    }

    .@{--css-prefix}-tab__item {
      display: inline-block;
      overflow: visible;
    }
  }

  &--vertical {
    display: flex;
    flex: 1;
    overflow: hidden;

    .@{--css-prefix}-tab__body {
      display: inline-block;
      flex: 1;
      height: var(--tab-pane-min-height);
      width: auto;
    }

    .@{--css-prefix}-tab__underline {
      top: 0;
      left: 0;
      bottom: auto;
      width: var(--tab-line-height);
      height: 100%;
    }

    .@{--css-prefix}-tab__header {
      display: inline-block;
      width: auto;
    }

    .@{--css-prefix}-tab__item {
      display: flex;
      justify-content: center;
      width: auto;
      align-items: center;

      &-underline {
        display: block;
        top: 0;
        right: 0;
        bottom: auto;
        left: auto;
        width: var(--tab-line-height);
        height: 100%;
        transform: scaleY(0);
        border-radius: 3px;
      }

      &--active {
        .@{--css-prefix}__item-underline {
          transform: scaleY(1);
        }
      }
    }
  }
}

/* hack SWAN */

.@{--css-prefix}-tab--scroll .@{--css-prefix}-tab--horizontal .@{--css-prefix}-tab--SWAN {
  .@{--css-prefix}-tab__item-underline {
    bottom: var(--tab-line-height);
  }
}

/* hack SWAN */

.@{--css-prefix}-tab-pane {
  display: inline-block;
  width: 100%;
  box-sizing: border-box;
  white-space: initial;
  vertical-align: top;

  /* modifiers */
  &--active {
    height: auto;
  }

  &--inactive {
    height: 0;
    overflow: hidden;
  }

  &--vertical {
    display: block;
    height: 100%;
    overflow: scroll;
  }
}