/**
 * Phase 1 Web UI - Responsive Stylesheet
 */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #2c3e50;
  --accent-color: #3498db;
  --success-color: #27ae60;
  --warning-color: #e74c3c;
  --light-bg: #ecf0f1;
  --light-text: #95a5a6;
  --border-color: #bdc3c7;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  /* theme-able surfaces */
  --body-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --surface-bg: #ffffff;
  --input-bg: #f5f5f5;
  --error-bg: #fadbd8;
  --error-text: #c0392b;
  --success-text: #1f7a3e;
  --warning-text: #a65f00;
  --muted-color: #cccccc;
  --pdf-render-bg: #525252;
  --page-surface: #ffffff;
  --page-text: #000000;
}

[data-theme="dark"] {
  --primary-color: #e2e8f0;
  --accent-color: #60a5fa;
  --success-color: #34d399;
  --warning-color: #f87171;
  --light-bg: #2d3748;
  --light-text: #718096;
  --border-color: #4a5568;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  --body-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --surface-bg: #1e2430;
  --input-bg: #242b38;
  --error-bg: #4a1a1a;
  --error-text: #f87171;
  --success-text: #34d399;
  --warning-text: #d4a24e;
  --muted-color: #4a5568;
  --pdf-render-bg: #111111;
  --page-surface: #1a1f2e;
  --page-text: #e8edf5;
  color-scheme: dark;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  background: var(--body-bg);
  min-height: 100vh;
  color: var(--primary-color);
}

input,
textarea,
select {
  background: var(--surface-bg);
  color: var(--primary-color);
  border-color: var(--border-color);
}

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

.container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1400px;
  margin: 0 auto;
}

/* ============================================================================
   HEADER
   ============================================================================ */

.header {
  background: var(--surface-bg);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
  position: relative;
}

.header h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.header .subtitle {
  font-size: 1.1rem;
  color: var(--light-text);
}

.build-version {
  margin-top: 0.35rem;
  color: var(--light-text);
  font-size: 0.78rem;
}

.build-version code {
  color: var(--text-color);
}

.dark-mode-toggle {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--light-bg);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 1rem;
  cursor: pointer;
  color: var(--primary-color);
  line-height: 1;
  transition: background 0.2s, border-color 0.2s;
}

.dark-mode-toggle:hover {
  background: var(--border-color);
}

/* ============================================================================
   MAIN CONTENT
   ============================================================================ */

.main {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 2rem;
  flex: 1;
  padding: 0 2rem;
  margin-bottom: 2rem;
}

.panel {
  background: var(--surface-bg);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  overflow-y: auto;
}

.panel h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 0.5rem;
}

/* ============================================================================
   SONG SELECTOR PANEL
   ============================================================================ */

.song-selector-panel {
  display: flex;
  flex-direction: column;
  max-height: none;
  min-height: 0;
  overflow: visible;
}

.song-selector-panel.request-first:not(.catalog-visible) > h2,
.song-selector-panel.request-first:not(.catalog-visible) .search-box,
.song-selector-panel.request-first:not(.catalog-visible) .language-filters,
.song-selector-panel.request-first:not(.catalog-visible) .render-toggle,
.song-selector-panel.request-first:not(.catalog-visible) .song-list-container {
  display: none;
}
.song-selector-panel.request-first .selected-songs {
  order: -1;
  border-top: none;
  padding-top: 0;
  margin-bottom: 0.75rem;
}
.song-selector-panel.request-first.catalog-visible > h2 {
  display: block;
}

.song-selector-panel.request-first.catalog-visible .search-box,
.song-selector-panel.request-first.catalog-visible .song-list-container {
  display: block;
}

.song-selector-panel.request-first.catalog-visible .language-filters {
  display: block;
}

.song-selector-panel.request-first.catalog-visible .render-toggle {
  display: flex;
}


.search-box {
  position: relative;
  margin-bottom: 1.5rem;
}

.search-box input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--light-text);
  opacity: 0;
  transition: opacity 0.2s;
}

.search-box input:not(:placeholder-shown) ~ .btn-clear {
  opacity: 1;
}

.btn-clear:hover {
  color: var(--primary-color);
}

.language-filters {
  border: none;
  margin: -0.75rem 0 0.75rem 0;
  padding: 0;
}

.language-filters legend {
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--secondary-color);
}

.language-toggle,
.render-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.5rem 0;
  font-size: 0.9rem;
  color: var(--secondary-color);
}

.render-toggle {
  margin-bottom: 0.75rem;
}

.language-toggle input[type='checkbox'],
.render-toggle input[type='checkbox'] {
  cursor: pointer;
}

.language-toggle span,
.render-toggle span {
  user-select: none;
}


/* Song List */

.song-list-container {
  flex: 1 1 auto;
  min-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--light-bg);
  border-radius: 4px;
  margin-bottom: 1.5rem;
  max-height: 400px;
}

.song-item {
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--light-bg);
  cursor: pointer;
  transition: background-color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.song-item:hover {
  background-color: var(--light-bg);
}

.song-item input[type='checkbox'] {
  cursor: pointer;
}

.song-item-content {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.song-item-number {
  display: inline-block;
  background: var(--accent-color);
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-size: 0.85rem;
  font-weight: bold;
  margin-right: 0.5rem;
}

.song-item-title {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}


.loading {
  text-align: center;
  padding: 2rem;
  color: var(--light-text);
}

/* Selected Songs */

.selected-songs {
  border-top: 2px solid var(--light-bg);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.selected-songs h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
}

.song-request {
  margin-bottom: 0.75rem;
}

.song-request label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 0.35rem;
}

.song-request-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.song-request-form input {
  flex: 1;
  min-width: 0;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.9rem;
}

.song-request-form button {
  padding: 0.45rem 0.8rem;
}

.song-request-status {
  min-height: 1.1rem;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--light-text);
}

.song-request-status.is-error {
  color: var(--warning-color);
}

.song-request-status.is-success {
  color: var(--success-text);
}

.paste-songs-container {
  margin-top: 0.5rem;
}

.paste-songs-container textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: inherit;
  resize: vertical;
}

.paste-songs-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.catalog-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.6rem 0;
  font-size: 0.86rem;
  color: var(--secondary-color);
}

.catalog-toggle input[type='checkbox'] {
  cursor: pointer;
}

.selected-songs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.selected-songs-header h3 {
  margin: 0;
}

.selected-songs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.selected-list {
  list-style: none;
  margin-bottom: 1rem;
  max-height: none;
  overflow-y: visible;
  padding-right: 0.25rem;
}

.selected-item {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  padding: 0.45rem 0.5rem;
  background: var(--light-bg);
  border-radius: 4px;
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
}

.selected-item-main {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.selected-item.is-dragging {
  opacity: 0.55;
  border: 1px dashed var(--accent-color);
}

.selected-item.drag-over {
  outline: 2px solid rgba(52, 152, 219, 0.35);
  outline-offset: 1px;
}

.selected-item-handle {
  color: var(--light-text);
  cursor: grab;
  font-size: 0.9rem;
  user-select: none;
  line-height: 1;
  touch-action: none;
  -webkit-user-drag: none;
}

.selected-item-handle:active {
  cursor: grabbing;
}

.selected-item-info {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.selected-item-remove {
  background: transparent;
  color: var(--warning-color);
  border: 1px solid var(--warning-color);
  border-radius: 999px;
  width: 1.4rem;
  height: 1.4rem;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.selected-item-remove:hover {
  background: var(--warning-color);
  color: white;
}

.selected-item-assignee {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.selected-item-assignee-label {
  color: var(--light-text);
  font-size: 0.78rem;
  font-weight: 600;
  min-width: 2.4rem;
}

.selected-item-assignee-input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.35rem 0.45rem;
  font-size: 0.82rem;
  background: var(--surface-bg);
  color: var(--secondary-color);
}

.selected-item-assignee-input:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.16);
}

.selected-break-row {
  display: flex;
  justify-content: center;
  margin: 0.1rem 0 0.5rem;
}

.page-break-btn {
  border: 1px dashed var(--border-color);
  background: transparent;
  color: var(--light-text);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font-size: 0.74rem;
  cursor: pointer;
}

.page-break-btn.is-active,
.selected-break-row.is-active .page-break-btn {
  border-style: solid;
  border-color: var(--accent-color);
  color: var(--accent-color);
  background: rgba(52, 152, 219, 0.08);
}

/* ============================================================================
   PREVIEW PANEL
   ============================================================================ */

.preview-panel {
  display: flex;
  flex-direction: column;
  min-height: 600px;
  max-height: none;
}

.preview-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.preview-header-row > h2 {
  margin-bottom: 0;
}

.service-generator-controls {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.service-layout-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--light-bg);
  padding: 0.2rem;
}

.service-layout-label {
  font-size: 0.82rem;
  color: var(--light-text);
  font-weight: 600;
  padding: 0 0.25rem 0 0.35rem;
}

.service-layout-switch .switch-option {
  border: none;
  border-radius: 3px;
  padding: 0.35rem 0.55rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-color);
  background: transparent;
  cursor: pointer;
  line-height: 1;
}

.service-layout-switch .switch-option.active {
  color: white;
  background: var(--accent-color);
}

.service-generator-btn {
  width: auto;
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  white-space: nowrap;
}


.preview-container {
  flex: 1;
  overflow: auto;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--input-bg);
  margin-bottom: 1rem;
  flex-direction: row;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  align-content: flex-start;
  padding: 1rem;
  gap: 1rem;
}

.preview-container .blank-preview-page {
  column-count: 1;
}

.preview-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--light-text);
  font-size: 1.1rem;
  text-align: center;
  padding: 2rem;
}

/* Embedded Preview Styles */

.preview-container .page {
  width: 8.5in;
  height: 11in;
  margin: 0;
  padding: 0.28in 0.5in;
  background: var(--page-surface);
  color: var(--page-text);
  border: 1px solid var(--border-color);
  column-count: 3;
  column-gap: 0.25in;
  page-break-after: always;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.preview-container .song {
  break-inside: avoid;
  margin-bottom: 7pt;
  font-size: 9pt;
}

.preview-container .song h2 {
  font-size: 10pt;
  font-weight: bold;
  border: none;
  padding: 0;
  margin: 0 0 4pt 0;
  line-height: 1.28;
}

.preview-container .song p {
  font-style: normal;
  line-height: 1.22;
  margin: 0;
  text-rendering: auto;
}

.preview-container .song p.verse-end {
  line-height: 1.4;
  margin-bottom: 4pt;
}

 .layout-status {
  min-height: 1.1rem;
  margin: 0 0 0.85rem;
  color: var(--light-text);
  font-size: 0.85rem;
}

 .layout-status.is-fallback {
  color: var(--warning-text);
}

/* ============================================================================
   ACTIONS & BUTTONS
   ============================================================================ */

.actions {
  display: flex;
  gap: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
  flex: 1;
}

.btn-primary:hover {
  background: #2980b9;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn-primary:disabled {
  background: var(--light-text);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--light-bg);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--surface-bg);
}

/* ============================================================================
   ERROR DISPLAY
   ============================================================================ */

.error-display {
  background: var(--error-bg);
  border-left: 4px solid var(--warning-color);
  border-radius: 4px;
  padding: 1rem;
  margin: 1rem 0;
}

.error-display h4 {
  color: var(--warning-color);
  margin-bottom: 0.5rem;
}

.error-display p {
  color: var(--error-text);
  font-size: 0.9rem;
  margin: 0;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.footer {
  background: var(--surface-bg);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--light-text);
}

.footer p {
  margin: 0.5rem 0;
}

.footer-links a {
  color: var(--accent-color);
  text-decoration: none;
  margin: 0 0.25rem;
}

.footer-links a:hover {
  text-decoration: underline;
}

/* ============================================================================
   MODAL
   ============================================================================ */

.modal {
  border: none;
  border-radius: 8px;
  padding: 0;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.modal::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.modal-content {
  padding: 2rem;
}

.modal-content h2 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.modal-content p {
  margin: 0.5rem 0;
  font-size: 0.95rem;
}

.modal-content ul {
  margin-left: 1.5rem;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

.modal-content li {
  margin: 0.25rem 0;
  font-size: 0.9rem;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 1024px) {
  .main {
    grid-template-columns: 300px 1fr;
    gap: 1.5rem;
    padding: 0 1rem;
  }

  .header h1 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .main {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0 1rem;
  }

  .song-selector-panel {
    max-height: 500px;
  }

  .panel {
    padding: 1rem;
  }

  .panel h2 {
    font-size: 1.25rem;
  }

  .header {
    padding: 1.5rem;
    margin-bottom: 1rem;
  }

  .header h1 {
    font-size: 1.75rem;
  }

  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .preview-header-row {
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .service-generator-controls {
    width: 100%;
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .service-generator-btn {
    width: auto;
  }

  .preview-container .page {
    width: 95%;
    margin: 0.5rem auto;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0;
  }

  .main {
    padding: 0;
  }

  .panel {
    border-radius: 0;
    padding: 1rem;
    max-height: none;
  }

  .header {
    padding: 1rem;
    margin-bottom: 0;
    border-radius: 0;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .header .subtitle {
    font-size: 0.95rem;
  }

  .song-item {
    padding: 0.5rem;
  }

  .search-box input {
    padding: 0.6rem;
    font-size: 16px; /* Prevent zoom on iOS */
  }

  .song-list-container {
    max-height: 300px;
  }

  .selected-item-assignee {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .selected-item-assignee-label {
    min-width: 0;
  }


  .btn {
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
  }
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.loading-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--light-bg);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
  /* Hide all UI chrome — only render zone content prints */
  body {
    background: var(--surface-bg);
    margin: 0;
    padding: 0;
  }

  .header,
  .song-selector-panel,
  .footer,
  .preview-header-row,
  .layout-status,
  .error-display,
  .pdf-controls,
  .paste-container {
    display: none !important;
  }

  .main {
    display: block;
    padding: 0;
    margin: 0;
  }

  .preview-panel {
    padding: 0;
    margin: 0;
    box-shadow: none;
    border: none;
    overflow: visible;
  }

  /* HTML fallback preview */
  .preview-container {
    border: none;
    margin: 0;
    padding: 0;
    overflow: visible;
  }

  .preview-container .page {
    margin: 0;
    padding: 0;
    border: none;
    box-shadow: none;
    page-break-after: always;
    overflow: visible;
    background: white !important;
    color: black !important;
  }

  [data-theme="dark"] .pdf-canvas,
  [data-theme="dark"] .pdf-page {
    filter: none !important;
  }

  /* PDF viewer: hide chrome, show only rendered pages */
  .pdf-viewer {
    border: none;
    overflow: visible;
  }

  .pdf-render {
    padding: 0;
    background: white;
    overflow: visible;
  }

  .pdf-render canvas {
    page-break-after: always;
    display: block;
    margin: 0;
    max-width: 100%;
  }
}


/* ===== PDF VIEWER STYLES ===== */

.pdf-viewer {
  display: flex;
  flex-direction: column;
  flex: 1;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--input-bg);
  overflow: hidden;
}

.pdf-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: var(--surface-bg);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}

.pdf-controls .btn-sm {
  padding: 6px 10px;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  background: var(--surface-bg);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.pdf-controls .btn-sm:hover {
  background: var(--light-bg);
  border-color: var(--primary-color);
}

.control-divider {
  color: var(--muted-color);
  margin: 0 5px;
}

.scale-label {
  font-size: 0.9rem;
  color: var(--light-text);
  white-space: nowrap;
}

.scale-slider {
  width: 80px;
  cursor: pointer;
  accent-color: var(--primary-color);
  vertical-align: middle;
}

.scale-value {
  font-size: 0.85rem;
  color: var(--light-text);
  min-width: 32px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.zoom-select {
  padding: 6px 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
  background: var(--surface-bg);
  color: var(--primary-color);
  transition: all 0.2s;
}

.zoom-select:hover {
  border-color: var(--primary-color);
}

.page-info {
  font-size: 0.9rem;
  color: var(--light-text);
  white-space: nowrap;
  min-width: 80px;
  text-align: center;
}

.pdf-render {
  flex: 1;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  gap: 16px;
  background: var(--pdf-render-bg);
  min-height: 72vh;
}

.pdf-page-spread {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  width: 100%;
  height: 100%;
}

.pdf-canvas {
  background: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  max-width: 100%;
  max-height: 100%;
  height: auto;
}

.pdf-page {
  background: white;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  margin: 0;
}

[data-theme="dark"] .pdf-canvas,
[data-theme="dark"] .pdf-page {
  filter: invert(1);
}

@media (max-width: 1024px) {
  .pdf-render {
    overflow: auto;
    min-height: 55vh;
  }
}

@media (max-width: 600px) {
  .pdf-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .pdf-controls .btn-sm,
  .zoom-select {
    width: 100%;
  }

  .scale-label {
    margin-top: 8px;
  }

  .control-divider {
    display: none;
  }
}

/* Print styles for PDF viewer merged into main @media print block above */