/**
 * DiffModal — side-by-side document version comparison modal.
 *
 * Override handles:
 *   .byline-diff-modal-header     — modal header padding
 *   .byline-diff-modal-title-stack — heading + subtitle stack
 *   .byline-diff-modal-title      — heading
 *   .byline-diff-modal-subtitle   — subtitle line
 *   .byline-diff-modal-version    — inline pill identifying the historical version
 *   .byline-diff-modal-content    — scrollable content
 *   .byline-diff-modal-state      — loading / error placeholder
 *   .byline-diff-modal-error      — error placeholder colour modifier
 *   .byline-diff-modal-viewer     — diff viewer wrapper
 */

.header,
:global(.byline-diff-modal-header) {
  padding-top: var(--spacing-16);
  margin-bottom: var(--spacing-8);
  flex-shrink: 0;
}

.title-stack,
:global(.byline-diff-modal-title-stack) {
  display: flex;
  flex-direction: column;
}

.title,
:global(.byline-diff-modal-title) {
  margin: 0;
  font-size: var(--font-size-xl);
}

.subtitle,
:global(.byline-diff-modal-subtitle) {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--gray-400);
}

.version,
:global(.byline-diff-modal-version) {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  background-color: var(--canvas-700);
  padding: 0 var(--spacing-4);
  border-radius: var(--border-radius-sm);
}

.content,
:global(.byline-diff-modal-content) {
  flex: 1 1 0;
  overflow: auto;
  padding: 0;
  min-height: 0;
}

.state,
:global(.byline-diff-modal-state) {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: var(--spacing-12);
  color: var(--gray-400);
}

.error,
:global(.byline-diff-modal-error) {
  color: var(--red-400);
  gap: 0;
}

.viewer,
:global(.byline-diff-modal-viewer) {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
}