/* Display components (shadcn/ui table, tabs, alert, avatar, separator, skeleton, kbd, progress,
/* breadcrumb, empty, item).
/*
/*   <div class="ui-table-container"><table class="ui-table">…</table></div>
/*
/*   Tabs: links (one page per tab, aria-current="page") or ReActionView state
/*   (aria-selected) — no JavaScript of their own:
/*   <nav class="ui-tabs">
/*     <a class="ui-tabs__trigger" aria-current="page" href="…">Account</a>
/*     <a class="ui-tabs__trigger" href="…">Password</a>
/*   </nav>
/*   ui-tabs--line draws them as underlined tabs instead of a segmented control.
/*
/*   <div class="ui-alert ui-alert--destructive" role="alert">
/*     <span class="icon icon--alert"></span>
/*     <p class="ui-alert__title">Unable to save</p>
/*     <div class="ui-alert__description">…</div>
/*   </div> */
@layer ui {
  /* Table */

  .ui-table-container {
    inline-size: 100%;
    overflow-x: auto;
    position: relative;
  }

  .ui-table {
    border-collapse: collapse;
    caption-side: bottom;
    font-size: var(--text-normal);
    inline-size: 100%;
    text-align: start;

    caption {
      color: var(--muted-foreground);
      margin-block-start: 1rem;
    }

    tr {
      border-block-end: 1px solid var(--border);
      transition: background-color 150ms;
    }

    tbody tr:last-child {
      border-block-end: 0;
    }

    tbody tr:hover,
    tr[aria-selected="true"] {
      background-color: color-mix(in oklch, var(--muted) 50%, transparent);
    }

    tr[aria-selected="true"] {
      background-color: var(--muted);
    }

    tfoot {
      background-color: color-mix(in oklch, var(--muted) 50%, transparent);
      border-block-start: 1px solid var(--border);
      font-weight: 500;
    }

    th {
      block-size: 2.5rem;
      color: var(--foreground);
      font-weight: 500;
      padding-inline: 0.5rem;
      text-align: start;
      vertical-align: middle;
      white-space: nowrap;
    }

    td {
      padding: 0.5rem;
      vertical-align: middle;
    }

    :is(th, td):has(.ui-checkbox) {
      inline-size: 1px;
      padding-inline-end: 0;
    }

    .ui-table__numeric {
      font-variant-numeric: tabular-nums;
      text-align: end;
    }

    /* The row's main link fills the row, so the whole row is a target. */
    .ui-table__row-link {
      color: inherit;
      font-weight: 500;
      text-decoration: none;

      &::after {
        content: "";
        inset: 0;
        position: absolute;
      }
    }

    tr:has(.ui-table__row-link) {
      position: relative;

      :is(a, button, input, select, label):not(.ui-table__row-link) {
        position: relative;
        z-index: 1;
      }
    }
  }

  /* Tabs */

  .ui-tabs {
    align-items: center;
    background-color: var(--muted);
    block-size: 2.25rem;
    border-radius: var(--radius-lg);
    color: var(--muted-foreground);
    display: inline-flex;
    inline-size: fit-content;
    max-inline-size: 100%;
    overflow-x: auto;
    padding: 3px;
    scrollbar-width: none;
  }

  .ui-tabs__trigger {
    align-items: center;
    background: none;
    block-size: 100%;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--foreground);
    cursor: pointer;
    display: inline-flex;
    flex: 1;
    font: inherit;
    font-size: var(--text-normal);
    font-weight: 500;
    gap: 0.375rem;
    justify-content: center;
    outline: none;
    padding: 0.25rem 0.5rem;
    text-decoration: none;
    transition: color 150ms, box-shadow 150ms, background-color 150ms;
    white-space: nowrap;

    &:focus-visible,
    &:has(input:focus-visible) {
      border-color: var(--ring);
      box-shadow: var(--ring-focus);
    }

    &:is([aria-current="page"], [aria-selected="true"], [aria-pressed="true"], :has(input:checked)) {
      background-color: var(--background);
      box-shadow: var(--shadow-sm);
    }

    &:has(input:is([type="radio"], [type="checkbox"])) {
      position: relative;

      input {
        appearance: none;
        cursor: pointer;
        inset: 0;
        margin: 0;
        position: absolute;
      }
    }

    .ui-badge--count {
      --ui-badge-bg: transparent;

      padding: 0;
    }
  }

  html[data-theme="dark"] .ui-tabs__trigger {
    color: var(--muted-foreground);

    &:is([aria-current="page"], [aria-selected="true"], [aria-pressed="true"], :has(input:checked)) {
      background-color: color-mix(in oklch, var(--input) 30%, transparent);
      border-color: var(--input);
      color: var(--foreground);
    }
  }

  @media (prefers-color-scheme: dark) {
    html:not([data-theme]) .ui-tabs__trigger {
      color: var(--muted-foreground);

      &:is([aria-current="page"], [aria-selected="true"], [aria-pressed="true"], :has(input:checked)) {
        background-color: color-mix(in oklch, var(--input) 30%, transparent);
        border-color: var(--input);
        color: var(--foreground);
      }
    }
  }

  /* Underlined tabs across a card or page. */
  /* disabled:pointer-events-none disabled:opacity-50 */
  .ui-tabs__trigger:is(:disabled, [aria-disabled="true"]) {
    opacity: 0.5;
    pointer-events: none;
  }

  .ui-tabs--line {
    background: none;
    block-size: auto;
    border-block-end: 1px solid var(--border);
    border-radius: 0;
    gap: 1rem;
    inline-size: 100%;
    justify-content: flex-start;
    padding: 0;

    .ui-tabs__trigger {
      border: 0;
      border-block-end: 2px solid transparent;
      border-radius: 0;
      color: var(--muted-foreground);
      flex: none;
      margin-block-end: -1px;
      padding: 0.5rem 0.125rem;

      &:hover {
        color: var(--foreground);
      }

      &:is([aria-current="page"], [aria-selected="true"], [aria-pressed="true"], :has(input:checked)) {
        background: none;
        border-block-end-color: var(--foreground);
        border-color: transparent transparent var(--foreground);
        box-shadow: none;
        color: var(--foreground);
      }
    }
  }

  /* Icon-only tabs (an index's Cards / Table / Board). */
  .ui-tabs--icons .ui-tabs__trigger {
    --icon-size: 1rem;

    aspect-ratio: 1;
    padding: 0;
  }

  /* Dark: the segmented trigger's fill and border are for the track, not for line tabs. */
  html[data-theme="dark"] .ui-tabs--line .ui-tabs__trigger:is([aria-current="page"], [aria-selected="true"], [aria-pressed="true"], :has(input:checked)) {
    background: none;
    border-color: transparent transparent var(--foreground);
  }

  @media (prefers-color-scheme: dark) {
    html:not([data-theme]) .ui-tabs--line .ui-tabs__trigger:is([aria-current="page"], [aria-selected="true"], [aria-pressed="true"], :has(input:checked)) {
      background: none;
      border-color: transparent transparent var(--foreground);
    }
  }

  .ui-tabs__content {
    flex: 1;
    outline: none;
  }

  /* Alert */

  .ui-alert {
    align-items: start;
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    color: var(--card-foreground);
    column-gap: 0.75rem;
    display: grid;
    font-size: var(--text-normal);
    grid-template-columns: 1fr;
    padding: 0.75rem 1rem;
    position: relative;
    row-gap: 0.125rem;
    text-align: start;
    inline-size: 100%;

    &:has(.ui-alert__icon) {
      grid-template-columns: 1rem 1fr;

      .ui-alert__title,
      .ui-alert__description {
        grid-column: 2;
      }
    }

    .ui-alert__icon {
      --icon-size: 1rem;

      block-size: 1rem;
      color: currentColor;
      grid-column: 1;
      grid-row: 1 / span 2;
      inline-size: 1rem;
      translate: 0 0.125rem;
    }
  }

  .ui-alert__title {
    font-weight: 500;
    letter-spacing: -0.01em;
    margin: 0;
    min-block-size: 1rem;
  }

  .ui-alert__description {
    color: var(--muted-foreground);
    display: grid;
    font-size: var(--text-normal);
    gap: 0.25rem;
    justify-items: start;

    p {
      margin: 0;
    }
  }

  .ui-alert--destructive {
    color: var(--destructive);

    .ui-alert__description {
      color: color-mix(in oklch, var(--destructive) 90%, transparent);
    }
  }

  .ui-alert--warning {
    background-color: color-mix(in oklch, var(--warning) 8%, var(--card));
    border-color: color-mix(in oklch, var(--warning) 35%, var(--border));
  }

  .ui-alert--success {
    background-color: color-mix(in oklch, var(--success) 8%, var(--card));
    border-color: color-mix(in oklch, var(--success) 35%, var(--border));
  }

  /* Avatar */

  .ui-avatar {
    align-items: center;
    background-color: var(--muted);
    block-size: var(--ui-avatar-size, 2rem);
    border-radius: 50%;
    color: var(--muted-foreground);
    display: inline-flex;
    flex-shrink: 0;
    font-size: calc(var(--ui-avatar-size, 2rem) * 0.4);
    font-weight: 500;
    inline-size: var(--ui-avatar-size, 2rem);
    justify-content: center;
    overflow: hidden;
    position: relative;
    user-select: none;

    img {
      aspect-ratio: 1;
      block-size: 100%;
      inline-size: 100%;
      object-fit: cover;
    }
  }

  .ui-avatar--sm { --ui-avatar-size: 1.5rem; }
  .ui-avatar--lg { --ui-avatar-size: 2.5rem; }

  .ui-avatar-group {
    display: flex;

    .ui-avatar {
      box-shadow: 0 0 0 2px var(--background);
      margin-inline-start: -0.5rem;
    }

    .ui-avatar:first-of-type {
      margin-inline-start: 0;
    }
  }

  /* Separator */

  .ui-separator {
    background-color: var(--border);
    block-size: 1px;
    border: 0;
    flex-shrink: 0;
    inline-size: 100%;
    margin: 0;
  }

  .ui-separator--vertical {
    align-self: stretch;
    block-size: auto;
    inline-size: 1px;
  }

  /* A separator with a label in the middle ("or continue with"). */
  .ui-separator--label {
    align-items: center;
    background: none;
    block-size: auto;
    color: var(--muted-foreground);
    display: flex;
    font-size: var(--text-normal);
    gap: 0.5rem;

    &::before,
    &::after {
      background-color: var(--border);
      block-size: 1px;
      content: "";
      flex: 1;
    }
  }

  /* Skeleton */

  .ui-skeleton {
    animation: ui-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    background-color: var(--accent);
    border-radius: var(--radius-md);
  }

  @keyframes ui-pulse {
    50% { opacity: 0.5; }
  }

  /* Kbd */

  .ui-kbd {
    align-items: center;
    background-color: var(--muted);
    block-size: 1.25rem;
    border-radius: var(--radius-sm);
    color: var(--muted-foreground);
    display: inline-flex;
    font-family: var(--font-sans);
    font-size: var(--text-x-small);
    font-weight: 500;
    gap: 0.25rem;
    justify-content: center;
    min-inline-size: 1.25rem;
    padding-inline: 0.25rem;
    pointer-events: none;
    user-select: none;
  }

  .ui-kbd-group {
    align-items: center;
    display: inline-flex;
    gap: 0.25rem;
  }

  /* Progress: a native <progress class="ui-progress">. */
  .ui-progress {
    -webkit-appearance: none;
    appearance: none;
    background-color: color-mix(in oklch, var(--primary) 20%, transparent);
    block-size: 0.5rem;
    border: 0;
    border-radius: 99rem;
    inline-size: 100%;
    overflow: hidden;

    &::-webkit-progress-bar {
      background: transparent;
    }

    &::-webkit-progress-value {
      background-color: var(--primary);
      transition: inline-size 200ms;
    }

    &::-moz-progress-bar {
      background-color: var(--primary);
    }
  }

  /* Breadcrumb */

  .ui-breadcrumb {
    align-items: center;
    color: var(--muted-foreground);
    display: flex;
    flex-wrap: wrap;
    font-size: var(--text-normal);
    gap: 0.375rem;
    list-style: none;
    margin: 0;
    padding: 0;
    word-break: break-word;

    @media (min-width: 640px) {
      gap: 0.625rem;
    }

    li {
      align-items: center;
      display: inline-flex;
      gap: 0.375rem;
    }

    li + li::before {
      content: "›";
      color: var(--muted-foreground);
      font-size: 1.1em;
      margin-inline-end: 0.25rem;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 150ms;

      &:hover {
        color: var(--foreground);
      }
    }

    [aria-current="page"] {
      color: var(--foreground);
      font-weight: 400;
    }
  }

  /* Empty: nothing here yet. */
  .ui-empty {
    align-items: center;
    border: 1px dashed var(--border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    justify-content: center;
    padding: 3rem 1.5rem;
    text-align: center;
  }

  .ui-empty__media {
    align-items: center;
    background-color: var(--muted);
    block-size: 2.5rem;
    border-radius: var(--radius-lg);
    color: var(--foreground);
    display: flex;
    inline-size: 2.5rem;
    justify-content: center;

    .icon {
      --icon-size: 1.5rem;
    }
  }

  .ui-empty__title {
    font-size: var(--text-medium);
    font-weight: 500;
    letter-spacing: -0.01em;
    margin: 0;
  }

  .ui-empty__description {
    color: var(--muted-foreground);
    font-size: var(--text-normal);
    margin: 0;
    max-inline-size: 24rem;
  }

  /* Item: a row with media, a title and description, and actions (shadcn's Item). Lists of
  /* records, settings rows, notifications. */
  .ui-item-group {
    display: flex;
    flex-direction: column;
    list-style: none;
    margin: 0;
    padding: 0;

    .ui-item + .ui-item,
    > li + li {
      border-block-start: 1px solid var(--border);
    }
  }

  .ui-item {
    align-items: center;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: inherit;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    text-align: start;
    text-decoration: none;
    transition: background-color 100ms;

    &:is(a):hover {
      background-color: color-mix(in oklch, var(--accent) 50%, transparent);
    }

    .ui-item-group & {
      border-radius: 0;
    }
  }

  /* The item open beside its list (shadcn's "mail" example): the muted wash. */
  .ui-item:is([aria-current="true"], [aria-current="page"], [aria-selected="true"]) {
    background-color: var(--muted);
  }

  .ui-item--outline {
    border-color: var(--border);
  }

  .ui-item--sm {
    gap: 0.625rem;
    padding: 0.75rem 1rem;
  }

  .ui-item__media {
    align-items: center;
    display: flex;
    flex-shrink: 0;
    gap: 0.5rem;
    justify-content: center;
  }

  .ui-item__content {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 0.25rem;
    min-inline-size: 0;
  }

  .ui-item__title {
    align-items: center;
    display: flex;
    font-size: var(--text-normal);
    font-weight: 500;
    gap: 0.5rem;
    line-height: 1.25;
    margin: 0;
  }

  .ui-item__description {
    color: var(--muted-foreground);
    font-size: var(--text-normal);
    line-height: 1.4;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .ui-item__actions {
    align-items: center;
    display: flex;
    gap: 0.5rem;
  }
}