KNACSS/sass/components/_tabs.scss

/* ----------------------------- */
/* ==Tabs                        */
/* ----------------------------- */
/* see example on https://knacss.com/styleguide.html#tabs */
/* NOTE : tabs need JavaScript to be activated */

$tabs-border            : $gray-200 !default;
$tabs-active-border     : $gray-800 !default;
$tabs-color             : $color-base !default;
$tabs-active-color      : $gray-800 !default;
$tabs-background        : transparent !default;
$tabs-active-background : transparent !default;
$tabs-border-radius     : 0 !default;

.tabs-menu {
  border-bottom: 2px solid $tabs-border;

  &-link {
    display: block;
    margin-bottom: -2px;
    padding: $spacer-tiny $spacer-medium-plus;
    border-bottom: 4px solid transparent;
    color: $tabs-color;
    background: $tabs-background;
    text-decoration: none;
    border-radius: $tabs-border-radius $tabs-border-radius 0 0;
    transition: .25s;
    transition-property: color, border, background-color;

    &.is-active {
      border-bottom-color: $tabs-active-border;
      color: $tabs-active-color;
      background: $tabs-active-background;
      outline: 0;
    }

    &:focus {
      border-bottom-color: $tabs-active-border;
      color: $tabs-active-color;
      outline: 0;
    }

    @media (min-width: $small) {
      display: inline-block;
    }
  }
}

.tabs-content-item {
  padding-top: $spacer-small;

  &[aria-hidden="true"] {
    visibility: hidden;
    @extend .visually-hidden;
  }

  &[aria-hidden="false"] {
    visibility: visible;
  }
}