/* UnderlineNav */

.UnderlineNav {
  display: flex;
  min-height: var(--base-size-48);
  overflow-x: auto;
  overflow-y: hidden;
  /* stylelint-disable-next-line primer/box-shadow */
  box-shadow: inset 0 -1px 0 var(--borderColor-muted);
  -webkit-overflow-scrolling: auto;
  justify-content: space-between;

  & .Counter {
    /* stylelint-disable-next-line primer/spacing */
    margin-left: var(--control-medium-gap);
    color: var(--fgColor-default);
    background-color: var(--bgColor-neutral-muted, var(--color-neutral-muted));
  }

  & .Counter--primary {
    color: var(--fgColor-onEmphasis);
    background-color: var(--bgColor-neutral-emphasis);
  }
}

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

.UnderlineNav-item {
  position: relative;
  display: flex;
  /* stylelint-disable-next-line primer/spacing */
  padding: 0 var(--control-medium-paddingInline-condensed);
  font-size: var(--text-body-size-medium);
  /* stylelint-disable-next-line primer/typography */
  line-height: 30px;
  color: var(--fgColor-default);
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  background-color: transparent;
  border: 0;
  border-radius: var(--borderRadius-medium);
  align-items: center;

  &:hover,
  &:focus,
  &:focus-visible {
    color: var(--fgColor-default);
    text-decoration: none;
    border-bottom-color: var(--borderColor-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);
    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(--fgColor-default);
      text-decoration: none;
      background: var(--control-transparent-bgColor-hover);
      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);
    color: var(--fgColor-default);
    border-bottom-color: var(--underlineNav-borderColor-active);

    /* current/selected underline */
    &::after {
      position: absolute;
      right: 50%;
      bottom: calc(50% - var(--base-size-24)); /* 48px total height / 2 (24px) + 1px */
      z-index: 1; /* raise above full-width flash banner */
      width: 100%;
      height: 2px;
      content: '';
      /* stylelint-disable-next-line primer/colors */
      background: var(--underlineNav-borderColor-active);
      border-radius: var(--borderRadius-medium);
      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);
  }
}

.UnderlineNav-octicon {
  display: inline !important;
  /* stylelint-disable-next-line primer/spacing */
  margin-right: var(--control-medium-gap);
  color: var(--fgColor-muted);
  fill: var(--fgColor-muted);
}

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