lens/src/renderer/components/tabs/tabs.scss

.Tabs {
  display: flex;
  user-select: none;
  -webkit-user-select: none; /* safari */
  -moz-user-select: none; /* firefox */

  &.withBorder {
    border-bottom: 1px solid $borderFaintColor;
  }

  &.wrap {
    flex-wrap: wrap;
  }

  &.center {
    > :first-child {
      margin-left: auto;
    }

    > :last-child {
      margin-right: auto;
    }
  }

  &.scrollable {
    @include hidden-scrollbar;
  }
}

.Tab {
  --color-active: #{$layoutTabsActiveColor};
  --line-color-active: #{$primary};
  --line-color-focus: currentColor;

  position: relative;
  padding: $padding $padding * 2;
  white-space: nowrap;

  &.disabled {
    pointer-events: none;
    opacity: .5;
  }

  &:not(.disabled) {
    cursor: pointer;

    &:after {
      content: "";
      position: absolute;
      right: 0;
      bottom: 0;
      width: 0;
      height: $unit /2;
      transition: width 250ms;
      background: currentColor;
      color: $halfGray
    }

    &:focus {
      &:after {
        color: var(--line-color-focus);
      }
    }

    &:hover,
    &.active {
      color: var(--color-active);

      &:after {
        width: 100%;
        left: 0;
        right: auto;
        color: var(--line-color-active);
      }
    }
  }
}