@layer components {
  /* ── Card ──────────────────────────────────────────────────── */
  .card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition:
      box-shadow var(--transition-base),
      border-color var(--transition-base);
  }

  .card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-text-tertiary);
  }

  /* ── Demo Card ─────────────────────────────────────────────── */
  .demo-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    cursor: pointer;
    transition:
      box-shadow var(--transition-base),
      border-color var(--transition-base),
      transform var(--transition-base);
  }

  .demo-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
    transform: translateY(-1px);
  }

  .demo-card__thumbnail {
    aspect-ratio: 16 / 9;
    background-color: var(--color-bg-tertiary);
    overflow: hidden;
    position: relative;
  }

  .demo-card__thumbnail iframe {
    width: 100%;
    height: 100%;
    border: none;
    pointer-events: none;
  }

  .demo-card__body {
    padding: 0.75rem 1rem;
  }

  .demo-card__title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.25rem;
  }

  .demo-card__meta {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-bottom: 0.5rem;
  }

  .demo-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  /* ── Buttons ───────────────────────────────────────────────── */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition:
      background-color var(--transition-base),
      color var(--transition-base),
      border-color var(--transition-base),
      box-shadow var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
  }

  .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }

  .btn-primary {
    background-color: var(--color-accent);
    color: var(--color-accent-text);
    border-color: var(--color-accent);
  }

  .btn-primary:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
  }

  .btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border-color: var(--color-border);
  }

  .btn-secondary:hover:not(:disabled) {
    background-color: var(--color-bg-hover);
    border-color: var(--color-text-tertiary);
  }

  .btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
  }

  .btn-ghost:hover:not(:disabled) {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
  }

  .btn-danger {
    background-color: var(--color-danger);
    color: #ffffff;
    border-color: var(--color-danger);
  }

  .btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-hover);
    border-color: var(--color-danger-hover);
  }

  .btn-sm {
    padding: 0.25rem 0.625rem;
    font-size: 0.8125rem;
  }

  .btn-icon {
    padding: 0.5rem;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: var(--radius-md);
    flex-shrink: 0;
  }

  /* ── Tag / Pill ────────────────────────────────────────────── */
  .tag {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    font-size: 0.6875rem;
    font-weight: 500;
    border-radius: 9999px;
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
    white-space: nowrap;
    line-height: 1.4;
  }

  .tag--removable {
    gap: 0.25rem;
    padding-right: 0.25rem;
  }

  .tag__remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
    border-radius: 9999px;
    border: none;
    background: transparent;
    color: inherit;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition-base);
    padding: 0;
    line-height: 1;
  }

  .tag__remove:hover {
    opacity: 1;
  }

  /* ── Form Elements ─────────────────────────────────────────── */
  .input,
  .textarea,
  .select {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition:
      border-color var(--transition-base),
      box-shadow var(--transition-base);
    outline: none;
  }

  .input::placeholder,
  .textarea::placeholder {
    color: var(--color-text-tertiary);
  }

  .input:focus,
  .textarea:focus,
  .select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.15);
  }

  .textarea {
    resize: vertical;
    min-height: 5rem;
  }

  .select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.625rem center;
    padding-right: 2.25rem;
    cursor: pointer;
  }

  /* ── Preview Container ─────────────────────────────────────── */
  .preview-container {
    position: relative;
    overflow: hidden;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
  }

  /* ── Preview iframe ────────────────────────────────────────── */
  .preview-iframe {
    position: absolute;
    top: 0;
    left: 0;
    border: none;
    transform-origin: top left;
    background-color: #ffffff;
  }

  /* ── Resize Handles ────────────────────────────────────────── */
  .resize-handle {
    position: absolute;
    z-index: 10;
    opacity: 0;
    transition: opacity var(--transition-base);
  }

  .preview-container:hover .resize-handle,
  .resize-handle:active {
    opacity: 1;
  }

  .resize-handle::after {
    content: '';
    display: block;
    background-color: var(--color-accent);
    border-radius: 9999px;
    opacity: 0.6;
    transition: opacity var(--transition-base);
  }

  .resize-handle:hover::after,
  .resize-handle:active::after {
    opacity: 1;
  }

  .resize-handle-right {
    top: 50%;
    right: -4px;
    transform: translateY(-50%);
    width: 8px;
    height: 48px;
    cursor: ew-resize;
  }

  .resize-handle-right::after {
    width: 4px;
    height: 100%;
    margin: 0 auto;
    border-radius: 2px;
  }

  .resize-handle-bottom {
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 8px;
    cursor: ns-resize;
  }

  .resize-handle-bottom::after {
    width: 100%;
    height: 4px;
    margin: auto 0;
    border-radius: 2px;
  }

  .resize-handle-corner {
    bottom: -4px;
    right: -4px;
    width: 16px;
    height: 16px;
    cursor: nwse-resize;
  }

  .resize-handle-corner::after {
    width: 10px;
    height: 10px;
    margin: auto;
    border-radius: 2px;
  }

  /* ── Dragging state ────────────────────────────────────────── */
  .is-dragging {
    pointer-events: none;
  }

  /* ── Skeleton / Shimmer ────────────────────────────────────── */
  @keyframes shimmer {
    0% {
      background-position: -200% 0;
    }
    100% {
      background-position: 200% 0;
    }
  }

  .skeleton {
    background: linear-gradient(
      90deg,
      var(--color-bg-tertiary) 25%,
      var(--color-bg-hover) 50%,
      var(--color-bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
  }

  /* ── Badge ─────────────────────────────────────────────────── */
  .badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.25rem;
    height: 1.25rem;
    padding: 0 0.3125rem;
    font-size: 0.6875rem;
    font-weight: 600;
    line-height: 1;
    border-radius: 9999px;
    background-color: var(--color-accent);
    color: var(--color-accent-text);
  }

  .badge--secondary {
    background-color: var(--color-bg-hover);
    color: var(--color-text-secondary);
  }

  /* ── Divider ───────────────────────────────────────────────── */
  .divider {
    height: 1px;
    background-color: var(--color-border);
    border: none;
    margin: 0;
  }

  .divider--vertical {
    width: 1px;
    height: auto;
    align-self: stretch;
  }

  /* ── Empty State ───────────────────────────────────────────── */
  .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--color-text-tertiary);
  }

  .empty-state__icon {
    width: 3rem;
    height: 3rem;
    opacity: 0.4;
  }

  .empty-state__title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-secondary);
  }

  .empty-state__description {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    max-width: 24rem;
    line-height: 1.6;
  }

  /* ── Sidebar Nav Item ─────────────────────────────────────── */
  .sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition:
      background-color var(--transition-base),
      color var(--transition-base);
  }

  .sidebar-nav-item:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text-primary);
  }

  .sidebar-nav-item.active {
    background-color: var(--color-accent-subtle);
    color: var(--color-accent);
    font-weight: 500;
  }

  /* ── Modal Dialog ─────────────────────────────────────────── */
  /* Tailwind preflight resets dialog margins, breaking browser's UA centering.
     Restore centering explicitly for dialogs with this class. */
  .modal-dialog {
    position: fixed;
    inset: 0;
    margin: auto;
    max-height: calc(100vh - 2rem);
    overflow-y: auto;
  }

  /* ── Storage Bar ───────────────────────────────────────────── */
  .storage-bar {
    height: 4px;
    border-radius: 9999px;
    background-color: var(--color-bg-hover);
    overflow: hidden;
  }

  .storage-bar__fill {
    height: 100%;
    border-radius: 9999px;
    background-color: var(--color-accent);
    transition: width var(--transition-slow);
  }

  .storage-bar__fill--warning {
    background-color: var(--color-warning);
  }

  .storage-bar__fill--danger {
    background-color: var(--color-danger);
  }
}