/* -- Combobox component ---------------------------------------- */

@layer components {
  .combobox {
    position: relative;
  }

  .combobox-trigger {
    width: 100%;
    justify-content: space-between;
  }

  .combobox-value {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    text-align: left;
    font-weight: 400;
  }

  .combobox-value[data-placeholder] {
    color: var(--muted-foreground);
  }

  .combobox-chevron {
    flex-shrink: 0;
    color: var(--muted-foreground);
    opacity: 0.5;
  }

  /* Clear button (injected by combobox.js after the trigger). Anchor-positioned
     over the trigger's chevron slot; anchored via the same per-instance anchor
     name the popover uses. `data-placeholder` presence is the single
     selection marker — the :has() rules below flip chevron and clear in sync,
     so no JS toggles visibility. */
  .combobox-clear {
    position: fixed;
    inset: auto;
    margin: 0;
    top: anchor(top);
    bottom: anchor(bottom);
    right: anchor(right);
    /* center the 20px box exactly over the 16px chevron (1rem trigger padding) */
    margin-inline-end: 0.875rem;
    width: 1.25rem;
    display: none;
    place-items: center;
    padding: 0;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--muted-foreground);
    cursor: pointer;

    &:hover { color: var(--foreground); }
    &:focus-visible { outline: 2px solid var(--ring); outline-offset: 1px; }
  }

  .combobox:has(.combobox-value:not([data-placeholder])) {
    & .combobox-clear { display: grid; }
    & .combobox-chevron { display: none; }
  }

  .combobox-content {
    position: fixed;
    inset: auto;
    margin: 0;
    padding: 0;
    background-color: var(--popover);
    color: var(--popover-foreground);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;

    /* -- Anchor positioning -- */
    top: anchor(bottom);
    left: anchor(left);
    width: anchor-size(width);
    margin-top: 4px;
    position-try-fallbacks: flip-block;

    /* -- Animation --------------------------------------------- */
    opacity: 0;
    transform: scale(0.96) translateY(-0.25rem);
    transition: opacity 150ms ease, transform 150ms ease,
                display 150ms allow-discrete;

    &:popover-open {
      opacity: 1;
      transform: scale(1) translateY(0);
    }
  }

  @starting-style {
    .combobox-content:popover-open {
      opacity: 0;
      transform: scale(0.96) translateY(-0.25rem);
    }
  }

  .combobox-search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
  }

  .combobox-search-icon {
    flex-shrink: 0;
    color: var(--muted-foreground);
  }

  .combobox-search-input {
    width: 100%;
    border: none;
    background: transparent;
    font-size: 0.875rem;
    font-family: var(--font-sans);
    color: var(--foreground);
    outline: none;

    &::placeholder { color: var(--muted-foreground); }
  }

  .combobox-listbox {
    max-height: 16rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 0.25rem;
  }

  .combobox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    border-radius: calc(var(--radius) * 0.6);
    font-size: 0.875rem;
    cursor: pointer;
    outline: none;
    transition: background 100ms;
    /* room for the selection check; the ::before is absolute (like
       .dropdown-check) so unselected rows never shift horizontally */
    padding-inline-start: 1.5rem;
    position: relative;

    &:hover, &[data-highlighted] {
      background-color: var(--accent);
      color: var(--accent-foreground);
    }

    /* Mask (not background-image): a data: URI SVG resolves currentColor to
       BLACK when used as an image, making the check invisible in dark mode.
       Masking paints it with background-color: currentColor — the real text
       color, hover/foreground included. */
    &[aria-selected="true"]::before {
      content: '';
      position: absolute;
      inset-inline-start: 0.375rem;
      top: 50%;
      transform: translateY(-50%);
      width: 1rem;
      height: 1rem;
      background-color: currentColor;
      mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
      mask-size: contain;
      mask-repeat: no-repeat;
      flex-shrink: 0;
    }

    &[aria-disabled="true"] {
      pointer-events: none;
      opacity: 0.5;
    }

    /* Author `display: flex` overrides the UA's [hidden] { display: none }
       (author origin always wins), so filter()'s item.hidden = true left
       non-matching options rendered — and clickable — in the list. */
    &[hidden] {
      display: none;
    }
  }

  .combobox-empty {
    padding: 1.5rem 0.5rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--muted-foreground);
  }

  .combobox-group-label {
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--muted-foreground);
  }

  .combobox-separator {
    height: 1px;
    background: var(--border);
    margin: 0.25rem -0.25rem;
  }

  /* -- Accessibility ------------------------------------------ */

  @media (prefers-reduced-motion: reduce) {
    .combobox-content {
      transition: none;
    }
    .combobox-item {
      transition: none;
    }
  }

  @media (forced-colors: active) {
    .combobox-content {
      border-color: ButtonText;
    }
    .combobox-item {
      &:hover, &[data-highlighted] {
        forced-color-adjust: none;
        background: Highlight;
        color: HighlightText;
      }
    }
  }
}