/* HWR Diagnostic Tool – layout and styling */

:root {
  --bg: #f5f5f5;
  --panel-bg: #fff;
  --border: #e0e0e0;
  --primary: #1a73e8;
  --primary-hover: #1557b0;
  --prediction: #e8710a;
  --text: #202124;
  --text-muted: #5f6368;
  --error: #c5221f;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

/* Login */
#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f0fe 0%, #fef7e0 100%);
}

.login-card {
  background: var(--panel-bg);
  padding: 2rem 2.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  text-align: center;
  max-width: 400px;
}

.login-card h1 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  color: var(--text);
}

.login-card p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

.login-form {
  text-align: left;
  margin-bottom: 1rem;
}

.login-form label {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 14px;
  color: var(--text);
}

.login-form input[type="text"],
.login-form input[type="password"] {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  box-sizing: border-box;
}

.login-form .btn {
  margin-top: 0.5rem;
}

.login-error {
  color: var(--error);
  margin-top: 1rem;
  min-height: 1.2em;
}

.login-origin-hint {
  margin-top: 1rem;
  font-size: 12px;
  color: var(--text-muted);
  word-break: break-all;
  display: none;
}

.login-origin-hint.origin-hint-visible {
  display: block;
}

.google-button-wrap {
  display: flex;
  justify-content: center;
  margin: 1rem 0;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.header-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.header-lang-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 13px;
  color: var(--text-muted);
}

.header-lang-text {
  white-space: nowrap;
}

.language-select {
  min-width: 7.5rem;
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  font: inherit;
  background: var(--panel-bg);
}

.header-annotator {
  color: var(--text-muted);
  font-size: 13px;
}

.header-nav {
  display: flex;
  gap: 0.5rem;
}

.app-workspace {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* Language gate (before first page load) */
.language-gate {
  padding: 2rem 1rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex: 1;
}

.language-gate-card {
  max-width: 420px;
  width: 100%;
  background: var(--panel-bg);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.language-gate-title {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.language-gate-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 0 1rem;
  line-height: 1.45;
}

.language-gate-label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
  font-size: 14px;
}

.language-gate-error {
  color: var(--error);
  min-height: 1.2em;
  margin: 0.75rem 0 0;
  font-size: 13px;
}

/* Buttons */
.btn {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 13px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

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

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

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

.btn-block {
  width: 100%;
  margin-top: 1rem;
}

.btn.loading {
  cursor: not-allowed;
  opacity: 0.85;
}

.btn-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 6px;
  vertical-align: middle;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: btn-spin 0.7s linear infinite;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* Loading indicators */
.loading-inline {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  color: var(--text-muted);
  font-size: 13px;
}

.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.85);
  color: var(--text-muted);
  font-size: 14px;
  z-index: 10;
}

.canvas-wrap {
  position: relative;
}

.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: btn-spin 0.7s linear infinite;
}

.spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

/* Main app: fixed viewport so long page list does not stretch the row */
#main-screen {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 220px 1fr 300px;
  gap: 0;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.panel {
  background: var(--panel-bg);
  border-right: 1px solid var(--border);
  padding: 1rem;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel:last-child {
  border-right: none;
  border-left: 1px solid var(--border);
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

/* Left column: one scroll area for mode actions + browse filters + page list */
.panel-pages-scroll {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
  scrollbar-gutter: stable;
}

.page-mode-toggle {
  display: flex;
  gap: 0;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

.page-mode-toggle .mode-tab {
  flex: 1;
  padding: 0.45rem 0.5rem;
  font-size: 12px;
  font-weight: 600;
  border: none;
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  font-family: inherit;
}

.page-mode-toggle .mode-tab:hover {
  background: #e8eaed;
}

.page-mode-toggle .mode-tab.active {
  background: var(--primary);
  color: #fff;
}

.annotate-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-shrink: 0;
}

.review-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-shrink: 0;
}

.review-actions .review-hint {
  margin: 0 0 0.25rem;
}

.browse-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-shrink: 0;
}

.browse-actions .browse-hint {
  margin: 0 0 0.25rem;
  font-size: 11px;
}

.browse-field-label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 12px;
  color: var(--text);
}

.browse-text-input {
  width: 100%;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
}

.browse-filter-details {
  font-size: 12px;
  color: var(--text);
}

.browse-filter-details summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.2rem 0;
}

.browse-filter-checkboxes {
  margin-top: 0.35rem;
  padding: 0.25rem 0;
}

.browse-filter-checkboxes label {
  display: block;
  font-weight: 400;
  margin-bottom: 0.2rem;
  font-size: 11px;
}

label.browse-other-cb {
  display: block;
  margin-top: 0.35rem;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.browse-readonly-banner {
  margin: 0 0 0.75rem;
  padding: 0.5rem 0.65rem;
  font-size: 12px;
  line-height: 1.35;
  color: #5f4b00;
  background: #fff8e1;
  border: 1px solid #f0d77a;
  border-radius: 6px;
}

.app-workspace.browse-readonly-feedback #feedback-accordion input,
.app-workspace.browse-readonly-feedback #feedback-accordion button:not(.feedback-acc-header),
.app-workspace.browse-readonly-feedback #feedback-accordion textarea,
.app-workspace.browse-readonly-feedback #feedback-accordion select {
  opacity: 0.65;
  pointer-events: none;
}

.app-workspace.browse-readonly-feedback #feedback-accordion .feedback-acc-header {
  pointer-events: auto;
  opacity: 1;
}

.review-date-label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 12px;
  color: var(--text);
}

.review-date-select {
  width: 100%;
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
}

.panel-pages .page-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 0 0 auto;
  min-height: 0;
}

.panel-pages .page-list li {
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 2px;
  font-size: 13px;
}

/* Page list: not yet reviewed = red (normal weight); reviewed / done = green (bold) */
.panel-pages .page-list li.page-list-not-yet {
  color: #c5221f;
  font-weight: 400;
}

.panel-pages .page-list li.page-list-done {
  color: #1b5e20;
  font-weight: 700;
}

.panel-pages .page-list li:hover {
  background: var(--bg);
}

.panel-pages .page-list li.active {
  background: #e8f0fe;
}

.panel-pages .page-list li.active.page-list-not-yet {
  color: #a50e0a;
  font-weight: 400;
}

.panel-pages .page-list li.active.page-list-done {
  color: #145523;
  font-weight: 700;
}

.panel-pages .page-list li.page-list-empty {
  cursor: default;
  color: var(--text-muted);
  font-style: italic;
}

.panel-pages .page-list li.page-list-empty:hover {
  background: transparent;
}

.panel-pages .annotate-actions #btn-save-reload {
  margin-top: 0;
  flex-shrink: 0;
}

/* Canvas */
.panel-canvas {
  min-width: 0;
  overflow: hidden;
}

.panel-canvas > h2,
.panel-canvas > .view-tabs,
.panel-canvas > .canvas-controls,
.panel-canvas > .legend {
  flex-shrink: 0;
}

.view-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.view-tab {
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel-bg);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}

.view-tab:hover {
  background: var(--bg);
}

.view-tab.active {
  font-weight: 600;
}

.view-tab#view-gt.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.view-tab#view-pred.active {
  background: var(--prediction);
  color: #fff;
  border-color: var(--prediction);
}

.view-tab#view-compare.active {
  background: #333;
  color: #fff;
  border-color: #333;
}

.canvas-wrap {
  flex: 1;
  min-height: 0;
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  overflow: hidden;
}

.canvas-viewport {
  flex: 1;
  min-height: 0;
  overflow: auto;
  overflow-x: auto;
  overflow-y: auto;
  scrollbar-gutter: stable;
  background: #e8eaed;
}

.canvas-zoom-slot {
  position: relative;
  flex-shrink: 0;
}

#canvas-container {
  position: relative;
  display: block;
  background: #fff;
  flex-shrink: 0;
  transform-origin: 0 0;
}

.zoom-controls {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
}

.btn-zoom {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel-bg);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
}

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

.btn-zoom-reset {
  width: auto;
  padding: 0 0.5rem;
  font-size: 12px;
}

.zoom-label {
  min-width: 3.25rem;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

.panel-feedback {
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
}

.panel-feedback > h2 {
  flex-shrink: 0;
  margin-top: 0;
}

.panel-feedback #btn-save-feedback {
  flex-shrink: 0;
  margin-top: 0.65rem;
}

.feedback-line-hint {
  margin: 0 0 0.5rem;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.35;
}

#canvas-container.selection-mode {
  cursor: crosshair;
}

.page-image {
  display: block;
  max-width: 100%;
  height: auto;
  background: #fff;
}


.bbox-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.bbox-layer #bbox-group {
  pointer-events: auto;
}

.bbox-layer #bbox-group polygon.bbox-clickable,
.bbox-layer #bbox-group-left polygon.bbox-clickable,
.bbox-layer #bbox-group-right polygon.bbox-clickable {
  pointer-events: visiblePainted;
  cursor: pointer;
}

.bbox-layer #bbox-group polygon.bbox-clickable:hover,
.bbox-layer #bbox-group-left polygon.bbox-clickable:hover,
.bbox-layer #bbox-group-right polygon.bbox-clickable:hover {
  filter: brightness(1.1);
}

.bbox-layer #bbox-group polygon.bbox-clickable.selected,
.bbox-layer #bbox-group-left polygon.bbox-clickable.selected,
.bbox-layer #bbox-group-right polygon.bbox-clickable.selected {
  stroke-width: 6 !important;
  stroke: #052e63 !important;
  filter: drop-shadow(0 0 2px #fff) drop-shadow(0 0 4px rgba(5, 46, 99, 0.85));
}

.bbox-layer #bbox-group polygon.bbox-clickable.diff-highlight,
.bbox-layer #bbox-group-left polygon.bbox-clickable.diff-highlight,
.bbox-layer #bbox-group-right polygon.bbox-clickable.diff-highlight {
  stroke: #c5221f;
  stroke-width: 2.5;
}

.bbox-layer.selection-mode {
  pointer-events: auto;
}

/* Stroke layer (below bboxes) – ink strokes in black */
#stroke-layer path,
#stroke-layer-left path,
#stroke-layer-right path {
  fill: none;
  stroke: #000;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Ghost / bbox labels: top-left above box (see renderGhostInGroup) */
#ghost-layer text.bbox-label,
#ghost-layer-left text.bbox-label,
#ghost-layer-right text.bbox-label {
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  fill: rgba(15, 15, 15, 0.92);
  pointer-events: none;
  paint-order: stroke fill;
  stroke: rgba(255, 255, 255, 0.95);
  stroke-width: 3px;
  stroke-linejoin: round;
}

.canvas-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.75rem;
  align-items: center;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 13px;
  cursor: pointer;
}

.control-row input[type="range"] {
  width: 120px;
}

#playback-label {
  min-width: 6em;
  font-size: 12px;
  color: var(--text-muted);
}

/* Comparison: side-by-side */
.compare-canvases {
  display: flex;
  gap: 1rem;
  overflow: hidden;
  flex: 1;
  min-height: 0;
}

.compare-panel {
  flex: 1;
  min-width: 300px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #fafafa;
}

.compare-label {
  padding: 0.35rem 0.5rem;
  font-size: 12px;
  font-weight: 600;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.compare-inner {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  overflow-x: auto;
  overflow-y: auto;
  scrollbar-gutter: stable;
}

.compare-zoom-slot {
  position: relative;
  flex-shrink: 0;
}

.compare-canvas-inner {
  position: relative;
  display: block;
  transform-origin: 0 0;
}

.compare-canvas-inner .page-image {
  display: block;
}

.compare-canvas-inner .bbox-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.compare-canvas-inner .bbox-layer #bbox-group-left,
.compare-canvas-inner .bbox-layer #bbox-group-right {
  pointer-events: auto;
}

.compare-canvas-inner .bbox-layer #bbox-group-left polygon.bbox-clickable,
.compare-canvas-inner .bbox-layer #bbox-group-right polygon.bbox-clickable {
  pointer-events: visiblePainted;
  cursor: pointer;
}

/* Quick tagging (P0) */
.tag-tier {
  margin: 0.5rem 0 0.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.tag-btn {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel-bg);
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}

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

.tag-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.tag-btn.tag-newpattern.active {
  background: #9c27b0;
  border-color: #9c27b0;
}

.hint-inline {
  font-weight: normal;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.legend {
  margin: 0.5rem 0 0;
  font-size: 12px;
  color: var(--text-muted);
}

/* Feedback */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Feedback accordion (Page / Line / Manual selection) */
.feedback-accordion {
  margin-bottom: 0.25rem;
  flex-shrink: 0;
}

.feedback-accordion .feedback-acc-item {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  overflow: hidden;
}

.feedback-accordion .feedback-acc-header.section-header,
.feedback-accordion .feedback-acc-header {
  width: 100%;
  background: var(--bg);
  border: none;
  padding: 0.65rem 0.85rem;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-family: inherit;
  box-sizing: border-box;
}

.feedback-accordion .feedback-acc-header:hover {
  background: #e8eaed;
}

.feedback-accordion .feedback-acc-header:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.feedback-accordion .feedback-acc-title {
  flex: 1;
  min-width: 0;
}

.feedback-accordion .arrow {
  flex-shrink: 0;
  font-size: 10px;
  line-height: 1;
  color: var(--text-muted);
  transition: transform 0.25s ease;
}

.feedback-accordion .feedback-acc-item.active .arrow {
  transform: rotate(180deg);
}

.feedback-accordion .feedback-acc-body.section-content,
.feedback-accordion .feedback-acc-body {
  display: none;
  padding: 0.85rem;
  border-top: 1px solid var(--border);
  background: var(--panel-bg);
}

.feedback-accordion .feedback-acc-item.active .feedback-acc-body {
  display: block;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 13px;
}

.other-label {
  display: block;
  margin-top: 0.5rem;
  font-size: 13px;
}

.other-label input {
  width: 100%;
  padding: 0.4rem 0.5rem;
  margin-top: 0.25rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 13px;
}

.selection-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.selection-toolbar .btn {
  flex-shrink: 0;
}

.toggle-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.line-list-wrap {
  border: 1px dashed var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  min-height: 60px;
}

/* Scrollable line list & manual selection list */
.line-list-wrap.line-list-scroll,
.line-list-wrap.selection-list-scroll {
  max-height: 11rem;
  min-height: 60px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
}

.line-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.line-list li {
  padding: 0.25rem 0;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
}

.line-list li:last-child {
  border-bottom: none;
}

.line-list li.selected {
  background: #e8f0fe;
  margin: 0 -0.5rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.line-list li.line-has-feedback {
  color: #137333;
  font-weight: 500;
}

.line-list li.line-has-feedback.selected {
  color: #0d5c26;
}

.line-list li.line-list-subheading {
  cursor: default;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  padding-top: 0.5rem;
  border-bottom: none;
}

.line-list li.line-list-subheading:first-child {
  padding-top: 0;
}

.hint {
  margin: 0 0 0.5rem;
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 180px 1fr 260px;
  }
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
    min-height: 0;
  }

  .layout > .panel {
    min-height: 0;
  }

  .panel-pages { order: 1; }
  .panel-canvas { order: 0; }
  .panel-feedback { order: 2; }
}

/* Success dialog */
.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.dialog-overlay.hidden {
  display: none !important;
}

.dialog-box {
  background: var(--panel-bg);
  padding: 1.5rem 2rem;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  max-width: 360px;
  text-align: center;
}

.dialog-title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: var(--text);
}

.dialog-message {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 14px;
}

.dialog-box .btn {
  min-width: 80px;
}