@layer components {
  /* ========================================
   * Outline / Chapter List (Right Drawer)
   * ======================================== */

  .outline {
    --outline-hairline: 2px;

    display: flex;
    flex-direction: column;
    gap: var(--block-space-quarter);
  }

  .outline__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .outline__count {
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
    font-variant-numeric: tabular-nums;
  }

  /* -- Chapter List -- */

  .outline__list {
    border-block-start: var(--border);
    display: flex;
    flex-direction: column;
  }

  /* -- Chapter Card: a row between hairlines; the open chapter takes an
     accent rule at its start. -- */

  .outline__card {
    display: flex;
    align-items: flex-start;
    gap: var(--inline-space-half);
    padding-block: var(--block-space-half);
    border-block-end: var(--border);
    color: var(--color-ink);
    position: relative;
    transition: background-color var(--transition-fast);
  }

  @media (hover: hover) {
    .outline__card:hover {
      background: var(--color-surface);
    }
  }

  .outline__card:has(> .outline__card-link[aria-current="page"])::before {
    background: var(--color-accent);
    content: "";
    inline-size: var(--outline-hairline);
    inset-block: var(--block-space-half);
    inset-inline-start: 0;
    position: absolute;
  }

  /* Card link (navigates to chapter editor) */

  .outline__card-link {
    flex: 1;
    min-inline-size: 0;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
  }

  /* Move-up / Move-down buttons */

  .outline__card-actions {
    display: flex;
    flex-direction: column;
    gap: var(--outline-hairline);
    flex-shrink: 0;
    align-self: center;
  }

  /* button_to generates <form> wrappers -- reset their layout */
  .outline__card-actions form {
    display: contents;
  }

  /* Desktop with a mouse: hidden until card is hovered or focused-within.
     A touch screen never hovers, so there they stay visible. */
  @media (min-width: 800px) and (hover: hover) {
    .outline__card-actions {
      opacity: 0;
      transition: opacity var(--transition-fast);
    }

    .outline__card:hover .outline__card-actions,
    .outline__card:focus-within .outline__card-actions {
      opacity: 1;
    }
  }

  .outline__move-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-block-size: var(--touch-target-min);
    min-inline-size: var(--touch-target-min);
    padding: 0;
    border: none;
    border-radius: var(--radius);
    background: transparent;
    color: oklch(var(--lch-ink-medium));
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
  }

  .outline__move-btn:hover {
    background: var(--color-surface);
    color: var(--color-ink);
  }

  /* Every card renders both. The first card's Move up and the last card's
     Move down keep their place but are hidden, so the rule follows the list
     through a drag. */
  .outline__card:first-child .outline__move-btn--up,
  .outline__card:last-child .outline__move-btn--down {
    visibility: hidden;
  }

  /* Drag handle */

  .outline__card-drag {
    display: flex;
    align-items: center;
    justify-content: center;
    min-block-size: var(--touch-target-min);
    min-inline-size: var(--touch-target-min);
    color: oklch(var(--lch-ink-medium));
    cursor: grab;
    touch-action: none;
    flex-shrink: 0;
  }

  .outline__card-drag:active {
    cursor: grabbing;
  }

  /* Phones and touch screens: 44px minimum tap targets */
  @media (max-width: 799px), (pointer: coarse) {
    .outline__move-btn,
    .outline__card-drag {
      min-block-size: 44px;
      min-inline-size: 44px;
    }
  }

  .outline__card-title {
    display: block;
    font-family: var(--font-prose);
    font-weight: 500;
    font-size: var(--text-small);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .outline__card-meta {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: var(--block-space-quarter) var(--inline-space);
    font-size: var(--text-xs);
    font-variant-numeric: tabular-nums;
    color: var(--color-ink-muted);
    margin-block-start: var(--block-space-quarter);
  }

  /* -- SortableJS ghost/drag states -- */

  .outline__card.sortable-ghost {
    opacity: 0.4;
    background: oklch(var(--lch-ink-lighter));
  }

  .outline__card.sortable-chosen {
    background: oklch(var(--lch-ink-lighter));
  }

  /* -- Outline notes (inline in drawer) -- */

  .outline__notes {
    padding: var(--block-space-half) var(--inline-space-half);
    border-block-start: var(--border);
    margin-block-start: var(--block-space-half);
  }

  .outline__notes-label {
    font-size: var(--text-small);
    font-weight: 600;
    color: oklch(var(--lch-ink-dark));
    margin-block-end: var(--block-space-half);
  }

  .outline__notes-content {
    font-size: var(--text-small);
    color: oklch(var(--lch-ink-dark));
    line-height: 1.5;
    white-space: pre-wrap;
  }
}