@layer components {
  .slideshow {
    --slideshow-border-color: var(--color-border);
    --slideshow-ring: none;

    border: 2px solid var(--slideshow-border-color);
    border-radius: 8px;
    box-shadow: var(--slideshow-ring);
    margin-block-start: 1rem;
    outline: none;
    overflow: hidden;

    &:focus-visible {
      --slideshow-border-color: var(--color-primary);
      --slideshow-ring: 0 0 0 2px var(--color-primary);
    }
  }

  .slideshow-viewport {
    align-items: center;
    background: var(--color-surface-sunken);
    display: grid;
    min-block-size: 200px;
    position: relative;
  }

  /* Print stacks every slide rather than showing only the active one. */
  .slideshow-slide {
    --slideshow-slide-opacity: 0;
    --slideshow-slide-visibility: hidden;
    --slideshow-slide-visibility-delay: 200ms;

    align-items: center;
    display: flex;
    grid-area: 1 / 1;
    justify-content: center;
    opacity: var(--slideshow-slide-opacity);
    padding: 1rem;
    transition: opacity 200ms ease, visibility 0s var(--slideshow-slide-visibility-delay);
    visibility: var(--slideshow-slide-visibility);

    &.slideshow-slide--active {
      --slideshow-slide-opacity: 1;
      --slideshow-slide-visibility: visible;
      --slideshow-slide-visibility-delay: 0s;
    }

    @media print {
      --slideshow-slide-opacity: 1;
      --slideshow-slide-visibility: visible;

      display: block;
      grid-area: auto;
      transition: none;
    }
  }

  .slideshow-image {
    block-size: auto;
    border-radius: 4px;
    inline-size: auto;
    max-block-size: 450px;
    max-inline-size: 100%;
    object-fit: contain;

    @media print {
      break-inside: avoid;
      margin-block-end: 1rem;
      max-block-size: none;
    }
  }

  .slideshow-arrow {
    --slideshow-arrow-background: oklch(var(--oklch-canvas) / 0.85);
    --slideshow-arrow-color: var(--color-primary);

    align-items: center;
    background: var(--slideshow-arrow-background);
    block-size: 36px;
    border: none;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
    color: var(--slideshow-arrow-color);
    cursor: pointer;
    display: flex;
    inline-size: 36px;
    inset-block-start: 50%;
    justify-content: center;
    position: absolute;
    transform: translateY(-50%);
    transition: background 150ms ease, color 150ms ease;
    z-index: 2;

    &:hover {
      --slideshow-arrow-background: var(--color-primary);
      --slideshow-arrow-color: var(--color-text-on-primary);
    }

    @media print { display: none; }
  }
  .slideshow-arrow--prev { inset-inline-start: 8px; }
  .slideshow-arrow--next { inset-inline-end: 8px; }

  .slideshow-dots {
    background: var(--color-surface);
    display: flex;
    gap: 2px;
    justify-content: center;
    padding: 0.4rem 0;

    @media print { display: none; }
  }

  /* A 12px hit target drawing a 20px dot. States only set --slideshow-dot-color. */
  .slideshow-dot {
    --slideshow-dot-color: var(--color-border);

    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    block-size: 12px;
    border: none;
    border-radius: 0;
    cursor: pointer;
    inline-size: 12px;
    padding: 0;
    position: relative;

    &::after {
      background: var(--slideshow-dot-color);
      block-size: 20px;
      border-radius: 50%;
      content: '';
      inline-size: 20px;
      inset-block-start: 50%;
      inset-inline-start: 50%;
      position: absolute;
      transform: translate(-50%, -50%);
      transition: background 150ms ease;
    }
    &.slideshow-dot--active { --slideshow-dot-color: var(--color-primary); }
    &:hover { --slideshow-dot-color: oklch(var(--oklch-primary-light)); }
  }

  /* Authoring UI */
  .slideshow-author-section {
    border-block-start: 1px solid var(--color-border);
    margin-block-start: 1.5rem;
    padding-block-start: 1rem;
  }
  .slideshow-author-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    list-style: none;
    margin: 0.75rem 0;
    padding: 0;
  }
  .slideshow-author-item {
    align-items: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    display: flex;
    gap: 0.75rem;
    padding: 0.5rem;
  }
  .slideshow-author-thumb img {
    block-size: 54px;
    border-radius: 4px;
    inline-size: 80px;
    object-fit: cover;
  }
  .slideshow-author-info {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 0.15rem;
  }
  .slideshow-author-pos {
    font-size: 0.85rem;
    font-weight: 600;
  }
  .slideshow-author-alt {
    color: var(--color-text-muted);
    font-size: 0.8rem;
  }
  .slideshow-author-actions {
    align-items: center;
    display: flex;
    gap: 0.25rem;
  }

  /* Per-slide display width control in the authoring list (#1163). */
  .slideshow-author-size {
    flex: 0 0 auto;

    form { margin: 0; }
  }

  .slideshow-add-form {
    align-items: flex-end;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-block-start: 0.75rem;

    .form-group { margin-block-end: 0; }
  }
}