ant-design/style/components/tabs.less

@tab-prefix-cls: ant-tabs;

.@{tab-prefix-cls} {
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
  .clearfix;
  color: @text-color;

  &-bar {
    outline: none;
  }

  &-ink-bar {
    z-index: 1;
    position: absolute;
    left: 0;
    bottom: 1px;
    box-sizing: border-box;
    height: 2px;
    background-color: @primary-color;
    transform: scaleX(1);
    transform-origin: 0 0;
    &-transition-forward {
      transition: right 0.3s @ease-in-out,
      left 0.3s @ease-in-out 0.3s * 0.3;
      transform: translateZ(0);
    }
    &-transition-backward {
      transition: right 0.3s @ease-in-out 0.3s * 0.3,
      left 0.3s @ease-in-out;
      transform: translateZ(0);
    }
  }

  &-bar {
    border-bottom: 1px solid @border-color-base;
    margin-bottom: 16px;
  }

  &-nav-container {
    overflow: hidden;
    font-size: 14px;
    line-height: @line-height-base;
    box-sizing: border-box;
    position: relative;
    white-space: nowrap;
    margin-bottom: -1px;
    .clearfix;
  }

  &-nav-container-scrolling {
    padding-left: 32px;
    padding-right: 32px;
  }

  &-tab-prev,
  &-tab-next {
    user-select: none;
    z-index: 2;
    margin-right: -2px;
    margin-top: 3px;
    width: 32px;
    height: 100%;
    line-height: 32px;
    cursor: pointer;
    border: 0;
    background-color: transparent;
    position: absolute;
    text-align: center;
    color: #999;
    transition: color 0.3s ease;

    &:hover {
      color: #666;
    }

    &-icon {
      position: relative;
      display: inline-block;
      font-style: normal;
      font-weight: bold;
      font-variant: normal;
      line-height: inherit;
      vertical-align: baseline;
      text-align: center;
      text-transform: none;
      font-family: sans-serif;
      .iconfont-size-under-12px(10px);

      &:before {
        display: block;
        font-family: "anticon" !important;
      }
    }
  }

  &-tab-btn-disabled {
    cursor: not-allowed;
    &,
    &:hover {
      color: #ccc;
    }
  }

  &-tab-next {
    right: 2px;

    &-icon:before {
      content: "\e600";
    }
  }

  &-tab-prev {
    left: 0;
    &-icon:before {
      content: "\e601";
    }
    :root & {
      filter: none;
    }
  }

  &-nav-wrap {
    overflow: hidden;
    margin-bottom: -1px;
  }

  &-nav-scroll {
    width: 99999px;
    overflow: hidden;
  }

  &-nav {
    box-sizing: border-box;
    padding-left: 0;
    transition: left 0.5s @ease-in-out;
    position: relative;
    margin: 0;
    list-style: none;
    float: left;

    &:before,
    &:after {
      display: table;
      content: " ";
    }

    &:after {
      clear: both;
    }

    .@{tab-prefix-cls}-tab-disabled {
      pointer-events: none;
      cursor: default;

      .@{tab-prefix-cls}-tab-inner {
        color: #ccc;
      }
    }

    .@{tab-prefix-cls}-tab {
      float: left;
      height: 100%;
      margin-right: 24px;
      box-sizing: border-box;
      position: relative;

      &-inner {
        padding: 8px 20px;
        transition: color 0.3s @ease-in-out;
        display: block;
        cursor: pointer;
        text-decoration: none;

        &:hover {
          color: tint(@primary-color, 20%);
        }

        &:active {
          color: shade(@primary-color, 5%);
          transform: translateZ(0);
        }

        .anticon {
          width: 14px;
          height: 14px;
          margin-right: 8px;
        }
      }
    }

    .@{tab-prefix-cls}-tab-active .@{tab-prefix-cls}-tab-inner {
      color: @primary-color;
      transform: translateZ(0);
    }
  }

  &-mini &-nav-container {
    font-size: 12px;
  }

  &-mini &-tab {
    margin-right: 0;
    .@{tab-prefix-cls}-tab-inner {
      padding: 8px 16px;
    }
  }

  &-tabpane-hidden {
    display: none;
  }

  &-content {
    position: relative;
    width: 100%;
  }

  &-slide-horizontal-backward-enter {
    .motion-common();
    animation-play-state: paused;
    animation-timing-function: @ease-in-out-quint;
    opacity: 0;
    animation-duration: 0.4s;
  }

  &-slide-horizontal-backward-enter&-slide-horizontal-backward-enter-active {
    animation-name: antMoveLeftIn;
    transform: translateZ(0);
    animation-play-state: running;
  }

  &-slide-horizontal-backward-leave {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    .motion-common();
    animation-play-state: paused;
    animation-timing-function: @ease-in-out-quint;
    animation-duration: 0.4s;
  }

  &-slide-horizontal-backward-leave&-slide-horizontal-backward-leave-active {
    animation-name: antMoveRightOut;
    transform: translateZ(0);
    animation-play-state: running;
  }

  &-slide-horizontal-forward-enter {
    .motion-common();
    animation-play-state: paused;
    animation-timing-function: @ease-in-out-quint;
    opacity: 0;
    animation-duration: 0.4s;
  }

  &-slide-horizontal-forward-enter&-slide-horizontal-forward-enter-active {
    animation-name: antMoveRightIn;
    animation-play-state: running;
    transform: translateZ(0);
  }

  &-slide-horizontal-forward-leave {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    .motion-common();
    animation-duration: 0.4s;
    animation-play-state: paused;
    animation-timing-function: @ease-in-out-quint;
  }

  &-slide-horizontal-forward-leave&-slide-horizontal-forward-leave-active {
    transform: translateZ(0);
    animation-name: antMoveLeftOut;
    animation-play-state: running;
  }

  &-vertical {
    > .@{tab-prefix-cls}-bar {
      border-bottom: 0;

      .@{tab-prefix-cls}-tab {
        float: none;
        margin-right: 0;
        margin-bottom: 16px;
        &:last-child {
          margin-bottom: 0;
        }
        .@{tab-prefix-cls}-tab-inner {
          padding: 8px 24px;
        }
      }

      .@{tab-prefix-cls}-nav-scroll {
        width: auto;
      }

      .@{tab-prefix-cls}-nav-container {
        margin-bottom: 0;
      }

      .@{tab-prefix-cls}-nav-wrap {
        margin-bottom: 0;
      }

      .@{tab-prefix-cls}-ink-bar {
        width: 2px;
        left: auto;
        height: auto;
        &-transition-forward {
          transition: bottom 0.3s @ease-in-out,
          top 0.3s @ease-in-out 0.3s * 0.3;
        }
        &-transition-backward {
          transition: bottom 0.3s @ease-in-out 0.3s * 0.3,
          top 0.3s @ease-in-out;
        }
      }
    }

    > .@{tab-prefix-cls}-content {
      overflow: hidden;
      width: auto;
    }
  }

  &-vertical&-left {
    > .@{tab-prefix-cls}-bar {
      float: left;
      border-right: 1px solid @border-color-split;
      margin-right: -1px;
      margin-bottom: 0;
      .@{tab-prefix-cls}-tab {
        .@{tab-prefix-cls}-tab-inner {
          text-align: right;
        }
      }
      .@{tab-prefix-cls}-nav-container {
        margin-right: -1px;
      }
      .@{tab-prefix-cls}-nav-wrap {
        margin-right: -1px;
      }
      .@{tab-prefix-cls}-ink-bar {
        right: 1px;
      }
    }
    > .@{tab-prefix-cls}-content {
      padding-left: 24px;
      border-left: 1px solid @border-color-split;
    }
  }

  &-vertical&-right {
    > .@{tab-prefix-cls}-bar {
      float: right;
      border-left: 1px solid @border-color-split;
      margin-left: -1px;
      margin-bottom: 0;
      .@{tab-prefix-cls}-nav-container {
        margin-left: -1px;
      }
      .@{tab-prefix-cls}-nav-wrap {
        margin-left: -1px;
      }
      .@{tab-prefix-cls}-ink-bar {
        left: 1px;
      }
    }
    > .@{tab-prefix-cls}-content {
      padding-right: 24px;
      border-right: 1px solid @border-color-split;
    }
  }

  &-bottom > &-bar {
    margin-bottom: 0;
    margin-top: 16px;
  }

  // card style
  &&-card &-nav-container {
    height: 36px;
  }
  &&-card &-ink-bar {
    visibility: hidden;
  }
  &&-card &-tab {
    margin: 0;
    border: 1px solid transparent;
    border-bottom: 0;
    border-radius: 6px 6px 0 0;
    transition: all 0.3s @ease-in-out;
    background: #f9f9f9;
    margin-right: 2px;
  }
  &&-card &-tab-inner {
    padding: 7px 16px 6px;
    transition: all 0.3s @ease-in-out;
  }
  &&-card &-tab-active {
    background: #fff;
    transform: translateZ(0);
    border-color: @border-color-base;
    color: @primary-color;
  }
  &&-card &-tab-active &-tab-inner {
    padding-bottom: 7px;
    transform: translateZ(0);
  }
  &&-card &-nav-wrap {
    margin-bottom: 0;
  }
  &&-card &-tab-inner .anticon-cross {
    margin-right: 0;
    color: #999;
    transition: all 0.3s @ease-in-out;
    .iconfont-size-under-12px(9px);
    transform-origin: 100% 50%;
    width: 0;
    text-align: right;
    vertical-align: middle;
    overflow: hidden;
    &:hover {
      color: #404040;
      font-weight: bold;
    }
  }

  &&-editable-card &-tab:not(&-tab-active):hover &-tab-inner {
    padding-left: 8px;
    padding-right: 8px;
  }

  &&-card &-tab-active .anticon-cross,
  &&-card &-tab:hover .anticon-cross {
    width: 16px;
    transform: translateZ(0);
  }

  &-extra-content {
    float: right;
    line-height: 32px;

    .@{tab-prefix-cls}-new-tab {
      width: 20px;
      height: 20px;
      line-height: 20px;
      text-align: center;
      cursor: pointer;
      border-radius: 3px;
      border: 1px solid @border-color-base;
      font-size: 12px;
      .iconfont-size-under-12px(10px);
      color: #999;
      transition: color 0.3s ease;
      &:hover {
        color: #404040;
      }
    }
  }
}