/* UnderlineNav */

.UnderlineNav {
  display: flex;
  min-height: var(--base-size-48, 48px);
  overflow-x: auto;
  overflow-y: hidden;
  box-shadow: inset 0 -1px 0 var(--color-border-muted);
  -webkit-overflow-scrolling: auto;
  justify-content: space-between;

  & .Counter {
    margin-left: var(--yattho-control-medium-gap, 8px);
    color: var(--color-fg-default);
    background-color: var(--color-neutral-muted);
  }

  & .Counter--primary {
    color: var(--color-fg-on-emphasis);
    background-color: var(--color-neutral-emphasis);
  }
}

.UnderlineNav-body {
  display: flex;
  align-items: center;
  gap: var(--yattho-control-medium-gap, 8px);
  list-style: none;
}

.UnderlineNav-item {
  position: relative;
  display: flex;
  padding: 0 var(--yattho-control-medium-paddingInline-condensed, 8px);
  font-size: var(--yattho-text-body-size-medium, 14px);
  line-height: 30px;
  color: var(--color-fg-default);
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  background-color: transparent;
  border: 0;
  border-radius: var(--yattho-borderRadius-medium, 6px);
  align-items: center;

  &:hover,
  &:focus,
  &:focus-visible {
    color: var(--color-fg-default);
    text-decoration: none;
    border-bottom-color: var(--color-neutral-muted);
    outline-offset: -2px;
    transition: border-bottom-color 0.12s ease-out;
  }

  /* renders a visibly hidden "copy" of the label in bold, reserving box space for when label becomes bold on selected */
  & [data-content]::before {
    display: block;
    height: 0;
    font-weight: var(--base-text-weight-semibold, 600);
    visibility: hidden;
    content: attr(data-content);
  }

  /* increase touch target area */
  &::before {
    @mixin minTouchTarget 48px;
  }

  /* hover state was "sticking" on mobile after click */
  @media (pointer: fine) {
    &:hover {
      color: var(--color-fg-default);
      text-decoration: none;
      background: var(--color-action-list-item-default-hover-bg);
      transition: background 0.12s ease-out;
    }
  }

  &.selected,
  &[role='tab'][aria-selected='true'],
  &[aria-current]:not([aria-current='false']) {
    font-weight: var(--base-text-weight-semibold, 600);
    color: var(--color-fg-default);
    border-bottom-color: var(--color-yattho-border-active);

    /* current/selected underline */
    &::after {
      position: absolute;
      right: 50%;
      bottom: calc(50% - 25px); /* 48px total height / 2 (24px) + 1px */
      width: 100%;
      height: 2px;
      content: '';
      background: var(--color-yattho-border-active);
      border-radius: var(--yattho-borderRadius-medium, 6px);
      transform: translate(50%, -50%);
    }
  }
}

.UnderlineNav--right {
  justify-content: flex-end;

  & .UnderlineNav-actions {
    flex: 1 1 auto;
  }
}

.UnderlineNav-actions {
  align-self: center;
}

.UnderlineNav--full {
  display: block;

  /* required for underline to align with additional wrapper element */
  & .UnderlineNav-body {
    min-height: var(--base-size-48, 48px);
  }
}

.UnderlineNav-octicon {
  display: inline !important;
  margin-right: var(--yattho-control-medium-gap, 8px);
  color: var(--color-fg-muted);
  fill: var(--color-fg-muted);
}

.UnderlineNav-container {
  display: flex;
  justify-content: space-between;
}