:root {
  --sf-primary: #6366f1;
  --sf-primary-light: #818cf8;
  --sf-surface: #f8f9fc;
  --sf-border: #e5e7eb;
  --sf-text: #111827;
  --sf-muted: #6b7280;
  --sf-highlight: rgba(59, 130, 246, 0.32);
  --sf-highlight-muted: rgba(59, 130, 246, 0.14);
  --sf-highlight-active: rgba(59, 130, 246, 0.55);
  --sf-card-bg: #f3f4f6;
  /* User drag-selection: 35% green on white */
  --sf-selection: rgba(34, 197, 94, 0.35);
}

* {
  box-sizing: border-box;
}

body ::selection,
body ::-moz-selection {
  background: var(--sf-selection);
}

html,
body {
  margin: 0;
  height: 100%;
  font-family: Roboto, system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--sf-surface);
  color: var(--sf-text);
}

.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 20px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

.sf-app-shell {
  display: flex;
  height: 100vh;
  min-height: 0;
  overflow: hidden;
}

.sf-sidebar {
  width: 260px;
  flex-shrink: 0;
  background: #151b28;
  color: #d1d5db;
  display: flex;
  flex-direction: column;
  border-right: 1px solid #1f2937;
}

.sf-sidebar__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px 12px;
}

.sf-sidebar__logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(99, 102, 241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #818cf8;
}

.sf-sidebar__brand {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sf-sidebar__tagline {
  color: #9ca3af;
  font-size: 12px;
}

.sf-sidebar__nav {
  flex: 1;
  padding: 8px 12px;
  overflow: auto;
}

.sf-sidebar__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  margin-bottom: 4px;
  border-radius: 12px;
  color: #d1d5db;
  text-decoration: none;
  font-size: 14px;
  transition: background 0.15s ease;
}

.sf-sidebar__item:hover {
  background: #1f2937;
}

.sf-sidebar__item--active {
  background: rgba(99, 102, 241, 0.18);
  border: 1px solid rgba(99, 102, 241, 0.35);
  color: #fff;
  font-weight: 600;
}

.sf-sidebar__item--active .material-symbols-outlined {
  color: #818cf8;
}

.sf-sidebar__item .material-symbols-outlined {
  color: #9ca3af;
  font-size: 20px;
}

.sf-sidebar__footer {
  padding: 0 12px 16px;
}

.sf-sidebar__premium {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  margin-bottom: 12px;
  border-radius: 14px;
  background: #1f2937;
  border: 1px solid #374151;
}

.sf-sidebar__premium .material-symbols-outlined {
  color: #fbbf24;
}

.sf-sidebar__premium strong {
  display: block;
  color: #fff;
  font-size: 14px;
}

.sf-sidebar__premium span {
  color: #9ca3af;
  font-size: 12px;
}

.sf-sidebar__user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 4px;
}

.sf-sidebar__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.25);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.sf-sidebar__user strong {
  display: block;
  color: #fff;
  font-size: 13px;
}

.sf-sidebar__user span {
  color: #9ca3af;
  font-size: 11px;
}

.sf-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--sf-surface);
}

.sf-workspace {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.sf-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: #fff;
  border-bottom: 1px solid var(--sf-border);
  flex-shrink: 0;
}

.sf-topbar__left {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
}

.sf-topbar__meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sf-topbar__meta strong {
  font-size: 15px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sf-muted {
  color: var(--sf-muted);
  font-size: 13px;
}

.sf-badge {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.12);
  color: var(--sf-primary);
  font-size: 12px;
  font-weight: 600;
}

.sf-ws-version {
  font-size: 11px;
  font-weight: 700;
  color: var(--sf-muted);
  padding: 2px 8px;
  border: 1px solid var(--sf-border);
  border-radius: 6px;
  margin-right: 8px;
}

.sf-ws-diag {
  font-size: 11px;
  color: #059669;
  margin-right: 10px;
  max-width: 220px;
  text-align: right;
}

.sf-ws-diag--warn {
  color: #d97706;
}

.sf-split {
  display: flex;
  flex: 1;
  min-height: 0;
  gap: 16px;
  padding: 16px 24px 20px;
  overflow: hidden;
  max-width: 1520px;
  margin: 0 auto;
  width: 100%;
  align-items: stretch;
}

.sf-panel {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--sf-border);
  border-radius: 16px;
  overflow: hidden;
  min-height: 0;
}

.sf-panel--source {
  flex: 1 1 0;
  min-width: 0;
}

.sf-panel--cards {
  flex: 0 0 580px;
  max-width: 580px;
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
}

.sf-panel--cards .sf-panel__header {
  background: #fff;
  border: 1px solid var(--sf-border);
  border-radius: 16px;
  margin-bottom: 0;
}

.sf-panel--cards .sf-panel__body {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.sf-panel--source .sf-panel__header {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  min-height: 48px;
}

.sf-panel--source .sf-tabs {
  flex: 0 0 auto;
}

.sf-ai-deck-status {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--sf-primary);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  z-index: 2;
}

.sf-ai-deck-status__spinner {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  border: 2px solid rgba(99, 102, 241, 0.25);
  border-top-color: var(--sf-primary);
  border-radius: 50%;
  animation: sf-ai-spin 0.75s linear infinite;
}

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

.sf-panel--source .sf-toolbar {
  flex: 1 1 100%;
  flex-wrap: wrap;
  padding-top: 6px;
}

.sf-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--sf-border);
  flex-shrink: 0;
}

.sf-panel__header h2 {
  margin: 0;
  font-size: 16px;
}

.sf-panel__header-title {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.sf-panel__header-title .sf-muted {
  white-space: nowrap;
}

.sf-panel__body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.sf-tabs {
  display: flex;
  gap: 4px;
}

.sf-tab {
  border: 1px solid var(--sf-border);
  background: #fff;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}

.sf-tab--active {
  background: rgba(99, 102, 241, 0.1);
  border-color: var(--sf-primary-light);
  color: var(--sf-primary);
  font-weight: 600;
}

.sf-toolbar {
  display: flex;
  gap: 8px;
}

.sf-tool {
  border: 1px solid var(--sf-border);
  background: #fff;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.sf-tool__key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.2);
  font-weight: 700;
  font-size: 11px;
}

.sf-pdf-view,
.sf-text-view {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.sf-pdf-root {
  flex: 1;
  overflow: auto;
  padding: 12px 16px;
  cursor: default;
  background: #eef0f4;
}

.sf-pdf-root:has(.sf-ws-native-text-layer) {
  user-select: text;
  -webkit-user-select: text;
}

.sf-pdf-root.sf-ws-view-only {
  user-select: none;
  -webkit-user-select: none;
  cursor: default;
}

.sf-scan-banner {
  margin: 10px 16px 0;
  padding: 10px 14px;
  border-radius: 10px;
  background: #fef3c7;
  border: 1px solid #fcd34d;
  color: #92400e;
  font-size: 13px;
  line-height: 1.45;
}

.sf-scan-banner__link {
  border: none;
  background: none;
  padding: 0;
  color: #6366f1;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}

.sf-pdf-root [data-sf-pdf-page] {
  max-width: 100%;
}

.sf-text-root {
  flex: 1;
  overflow: auto;
  padding: 16px 20px;
  line-height: 1.55;
  font-size: 15px;
  user-select: text;
  white-space: pre-wrap;
  cursor: pointer;
}

.sf-hint {
  margin: 0;
  padding: 10px 16px 0;
  font-size: 12px;
  color: var(--sf-muted);
}

.sf-text-root mark.sf-active {
  background: var(--sf-highlight-active);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.5);
}

.sf-text-root:has(mark.sf-active) mark:not(.sf-active) {
  background: var(--sf-highlight-muted);
}

.sf-text-root mark {
  background: var(--sf-highlight);
  border-radius: 2px;
  cursor: pointer;
}

.sf-ws-text-layer span.sf-ws-source-text-highlight,
.sf-ws-native-text-layer span.sf-ws-source-text-highlight {
  background-color: var(--sf-highlight-active) !important;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.sf-ws-source-highlight-layer {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
}

.sf-ws-source-highlight-box {
  position: absolute;
  border-radius: 2px;
  background: var(--sf-highlight);
  pointer-events: none;
}

.sf-ws-source-highlight-box[data-active='true'] {
  background: var(--sf-highlight-active);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.5);
}

.sf-pdf-root.sf-ws-highlight-focus .sf-ws-source-highlight-box:not([data-active='true']) {
  background: var(--sf-highlight-muted);
}

.sf-ws-source-highlight-layer:has(.sf-ws-source-highlight-box[data-active='true'])
  .sf-ws-source-highlight-box:not([data-active='true']) {
  background: var(--sf-highlight-muted);
}

.sf-pdf-root.sf-ws-user-selecting .sf-ws-source-highlight-layer {
  opacity: 1;
}

.sf-pdf-root.sf-ws-user-selecting .sf-ws-source-highlight-box {
  box-shadow: none;
}

.sf-ws-deck-meta--busy {
  color: var(--sf-primary);
  font-weight: 600;
}

@media (max-width: 900px) {
  .sf-ai-deck-status {
    position: static;
    transform: none;
    margin-top: 8px;
    font-size: 12px;
    padding: 5px 10px;
  }

  .sf-panel--source .sf-panel__header {
    flex-wrap: wrap;
  }
}

.sf-cards-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: stretch;
  padding: 16px 0;
  overflow: hidden;
  min-height: 0;
}

.sf-cards-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 580px;
  min-height: 0;
  background: #f3f4f6;
  border: 1px solid var(--sf-border);
  border-radius: 16px;
  padding: 10px;
}

.sf-cards-inner .sf-empty {
  padding: 48px 24px;
  text-align: center;
  background: #fff;
  border-radius: 14px;
}

.sf-card-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
}

.sf-flashcard {
  flex: 1;
  min-height: 0;
  background: #fff;
  border: 1px solid #e8eaed;
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(17, 24, 39, 0.04);
  overflow: hidden;
}

.sf-flashcard label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--sf-muted);
}

.sf-flashcard textarea {
  width: 100%;
  border: 1px solid var(--sf-border);
  border-radius: 8px;
  padding: 10px;
  font: inherit;
  resize: none;
  overflow-y: auto;
  background: #fff;
  line-height: 1.45;
}

#card-front {
  flex: 0 0 96px;
  height: 96px;
  min-height: 96px;
  max-height: 96px;
}

#card-back {
  flex: 1 1 auto;
  min-height: 0;
}

.sf-excerpt {
  flex: 0 0 auto;
  margin: 0;
  max-height: 56px;
  overflow-y: auto;
  font-size: 12px;
  color: var(--sf-muted);
  font-style: italic;
}

.sf-card-nav {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
}

.sf-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  max-width: 200px;
  justify-content: center;
}

.sf-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: none;
  background: #d1d5db;
  cursor: pointer;
  padding: 0;
}

.sf-dot--active {
  background: var(--sf-primary);
}

.sf-card-actions {
  flex-shrink: 0;
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  min-height: 40px;
  align-items: center;
}

.sf-btn {
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--sf-border);
  background: #fff;
}

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

.sf-btn--ghost {
  background: transparent;
}

.sf-btn--danger {
  color: #dc2626;
  border-color: #fecaca;
  background: #fef2f2;
}

.sf-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.sf-empty {
  text-align: center;
  color: var(--sf-muted);
  padding: 48px 16px;
}

.sf-hidden {
  display: none !important;
}

.sf-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 14px;
  z-index: 99999;
}

/* Minimal PDF.js text layer — skip workspace OCR + native layers (rules below) */
.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer) {
  position: absolute;
  inset: 0;
  overflow: visible;
  line-height: 1;
  transform-origin: 0 0;
  z-index: 2;
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  opacity: 1 !important;
}

.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer) > span,
.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer) > br {
  position: absolute;
  white-space: pre;
  cursor: pointer;
  transform-origin: 0 0;
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
}

/* Native PDF — PDF.js TextLayer (alignment via pdf_viewer.css + textLayer class) */
.sf-pdf-root .textLayer.sf-ws-native-text-layer {
  overflow: visible !important;
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  z-index: 2 !important;
}

.sf-pdf-root .textLayer.sf-ws-native-text-layer span,
.sf-pdf-root .textLayer.sf-ws-native-text-layer br {
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  cursor: pointer;
  color: rgba(0, 0, 0, 0.01) !important;
}

/* Native PDF — v48 fallback ::selection; Chrome uses CSS Highlight API (see JS) */
.sf-pdf-root .textLayer.sf-ws-native-text-layer span::selection,
.sf-pdf-root .textLayer.sf-ws-native-text-layer span::-moz-selection {
  background: var(--sf-selection) !important;
  color: transparent !important;
}

body[data-sf-native-selecting='true'] .sf-pdf-root .textLayer.sf-ws-native-text-layer::selection,
body[data-sf-native-selecting='true'] .sf-pdf-root .textLayer.sf-ws-native-text-layer ::selection,
body[data-sf-native-selecting='true'] .sf-pdf-root .textLayer.sf-ws-native-text-layer *::selection,
body[data-sf-native-selecting='true'] .sf-pdf-root .textLayer.sf-ws-native-text-layer *::-moz-selection {
  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  color: rgba(0, 0, 0, 0.01) !important;
  -webkit-text-fill-color: rgba(0, 0, 0, 0.01) !important;
}

::highlight(sf-native-selection) {
  background-color: var(--sf-selection);
  color: transparent;
}

.sf-pdf-root .textLayer.sf-ws-native-text-layer .endOfContent {
  display: none !important;
  user-select: none !important;
  pointer-events: none !important;
}

.sf-ws-page {
  max-width: 100%;
  user-select: none;
  -webkit-user-select: none;
}

/* OCR scan layer — custom boxes (scans only, v33 logic) */
.sf-pdf-root .sf-ws-ocr-text-layer,
.sf-pdf-root .textLayer.sf-ws-ocr-text-layer {
  pointer-events: none !important;
  user-select: none !important;
  -webkit-user-select: none !important;
  z-index: 2 !important;
}

.sf-pdf-root .sf-ws-ocr-text-layer span:not(.sf-ocr-hit),
.sf-pdf-root .textLayer.sf-ws-ocr-text-layer span:not(.sf-ocr-hit) {
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  cursor: pointer;
  color: rgba(0, 0, 0, 0.01) !important;
}

.sf-pdf-root .sf-ws-ocr-text-layer .sf-ocr-hit {
  pointer-events: auto !important;
  user-select: none !important;
  -webkit-user-select: none !important;
  cursor: pointer !important;
  background: transparent;
  z-index: 3;
}

.sf-pdf-root .sf-ws-ocr-text-layer[data-sf-ocr='true'] span:not(.sf-ocr-hit) {
  position: absolute;
  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  box-sizing: border-box !important;
  margin: 0 !important;
  padding: 0 !important;
  letter-spacing: normal;
  line-height: 1 !important;
  transform: none !important;
  cursor: pointer !important;
  z-index: 2;
}

.sf-pdf-root .sf-ws-native-text-layer.selecting,
.sf-pdf-root .sf-ws-ocr-text-layer.selecting {
  user-select: text !important;
  -webkit-user-select: text !important;
}

.sf-pdf-root .sf-ws-ocr-text-layer span:not(.sf-ocr-hit)::selection {
  background: transparent !important;
  background-color: transparent !important;
  color: rgba(0, 0, 0, 0.01) !important;
  -webkit-text-fill-color: rgba(0, 0, 0, 0.01) !important;
}

body[data-sf-ocr-selecting='true'] .sf-pdf-root .textLayer.sf-ws-ocr-text-layer::selection,
body[data-sf-ocr-selecting='true'] .sf-pdf-root .textLayer.sf-ws-ocr-text-layer ::selection,
body[data-sf-ocr-selecting='true'] .sf-pdf-root .textLayer.sf-ws-ocr-text-layer *::selection,
body[data-sf-ocr-selecting='true'] .sf-pdf-root .textLayer.sf-ws-ocr-text-layer *::-moz-selection {
  background: transparent !important;
  background-color: transparent !important;
  background-image: none !important;
  color: rgba(0, 0, 0, 0.01) !important;
  -webkit-text-fill-color: rgba(0, 0, 0, 0.01) !important;
}

::highlight(sf-ocr-selection) {
  background-color: var(--sf-selection);
  color: transparent;
}

.sf-ws-page > .sf-ocr-selection-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  overflow: hidden;
}

.sf-ocr-selection-overlay .sf-ocr-selection-box {
  position: absolute;
  background: var(--sf-selection);
  border-radius: 2px;
}

.sf-pdf-root .sf-ws-native-text-layer span,
.sf-pdf-root .sf-ws-ocr-text-layer span:not(.sf-ocr-hit) {
  user-select: text !important;
  -webkit-user-select: text !important;
}

.sf-ws-loading {
  padding: 32px;
  text-align: center;
  color: #6b7280;
}

.sf-ws-loading--error {
  color: #dc2626;
}

body.sf-textmarker-off .sf-ws-native-text-layer,
body.sf-textmarker-off .sf-ws-native-text-layer span,
body.sf-textmarker-off .sf-ws-ocr-text-layer,
body.sf-textmarker-off .sf-ws-ocr-text-layer span {
  pointer-events: none !important;
  user-select: none !important;
}

.sf-pdf-root [data-sf-pdf-page] canvas,
.sf-pdf-root .sf-ws-page canvas {
  pointer-events: none !important;
}

.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer),
.sf-pdf-root .sf-pdf-text-layer {
  z-index: 10 !important;
  pointer-events: auto !important;
  overflow: visible !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  opacity: 1 !important;
}

.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer) span,
.sf-pdf-root .sf-pdf-text-layer span {
  pointer-events: auto !important;
  user-select: text !important;
  -webkit-user-select: text !important;
  color: rgba(0, 0, 0, 0.01) !important;
}

.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer) span::selection,
.sf-pdf-root .textLayer:not(.sf-ws-text-layer):not(.sf-ws-native-text-layer) span::-moz-selection,
.sf-pdf-root .sf-pdf-text-layer span::selection,
.sf-pdf-root .sf-pdf-text-layer span::-moz-selection {
  background: var(--sf-selection) !important;
  color: transparent !important;
}

.sf-pdf-root [data-sf-pdf-page] canvas {
  pointer-events: none !important;
}

.sf-pdf-root .sf-pdf-highlight-layer {
  pointer-events: none !important;
}

body.sf-textmarker-off .sf-pdf-root {
  user-select: none;
  cursor: default;
}

body.sf-textmarker-off .sf-pdf-root .textLayer,
body.sf-textmarker-off .sf-pdf-root .sf-pdf-text-layer,
body.sf-textmarker-off .sf-pdf-root .textLayer span {
  pointer-events: none !important;
  user-select: none !important;
}

@media (max-width: 900px) {
  .sf-split {
    flex-direction: column;
    max-width: none;
  }

  .sf-panel--cards {
    flex: 1 1 auto;
    max-width: none;
    min-height: 360px;
  }
}

/* —— Highlight-Diagnose —— */
.sf-diag-panel {
  position: fixed;
  inset: 0;
  z-index: 100000;
  background: rgba(15, 23, 42, 0.45);
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
}

.sf-diag-panel.sf-hidden {
  display: none;
}

.sf-diag-panel__inner {
  width: min(520px, 100vw);
  background: #fff;
  box-shadow: -8px 0 32px rgba(15, 23, 42, 0.12);
  display: flex;
  flex-direction: column;
  max-height: 100vh;
}

.sf-diag-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--sf-border);
}

.sf-diag-panel__header h2 {
  margin: 0;
  font-size: 18px;
}

.sf-diag-close {
  font-size: 22px;
  line-height: 1;
  padding: 4px 10px;
}

.sf-diag-summary {
  padding: 16px 20px;
  border-bottom: 1px solid var(--sf-border);
  font-size: 13px;
}

.sf-diag-layer-counts,
.sf-diag-type-list {
  margin: 8px 0 0;
  padding-left: 18px;
}

.sf-diag-hint {
  margin: 12px 0 0;
  color: var(--sf-muted);
  font-size: 12px;
}

.sf-diag-failures {
  flex: 1;
  overflow: auto;
  padding: 12px 16px 24px;
}

.sf-diag-failure {
  border: 1px solid var(--sf-border);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 12px;
  background: #fafafa;
}

.sf-diag-failure header {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 10px;
}

.sf-diag-dl {
  margin: 0;
  font-size: 12px;
}

.sf-diag-dl dt {
  font-weight: 700;
  color: var(--sf-muted);
  margin-top: 8px;
}

.sf-diag-dl dd {
  margin: 4px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.sf-diag-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
  font-size: 11px;
  color: var(--sf-muted);
}

.sf-diag-verdict {
  margin: 10px 0 0;
  font-size: 12px;
}

.sf-diag-failure details pre {
  font-size: 10px;
  overflow: auto;
  max-height: 200px;
  background: #f3f4f6;
  padding: 8px;
  border-radius: 6px;
}

#btn-diag-run {
  margin-right: 8px;
  font-size: 12px;
}

.sf-why-source-panel {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid #c7d2fe;
  border-radius: 12px;
  background: #f5f7ff;
  font-size: 12px;
  max-height: 340px;
  overflow: auto;
}

.sf-why-source-panel.sf-hidden {
  display: none;
}

.sf-why-source__header h3 {
  margin: 0 0 10px;
  font-size: 14px;
  color: #4338ca;
}

.sf-why-source__dl {
  margin: 0 0 12px;
}

.sf-why-source__dl dt {
  font-weight: 700;
  color: #6b7280;
  margin-top: 8px;
}

.sf-why-source__dl dd {
  margin: 4px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.sf-why-chosen {
  background: #eef2ff;
  border-radius: 8px;
  padding: 8px;
}

.sf-why-badge {
  display: inline-block;
  margin-top: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
}

.sf-why-badge--chosen {
  background: #4338ca;
  color: #fff;
}

.sf-why-badge--missing {
  background: #fee2e2;
  color: #991b1b;
}

.sf-why-source-panel h4 {
  margin: 0 0 8px;
  font-size: 12px;
  color: #374151;
}

.sf-why-alternatives {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sf-why-alt {
  display: flex;
  gap: 8px;
  padding: 8px 0;
  border-top: 1px solid #e5e7eb;
}

.sf-why-alt__num {
  font-weight: 700;
  color: #6366f1;
  min-width: 18px;
}

.sf-why-alt__body {
  flex: 1;
}

.sf-why-warning {
  margin: 10px 0 0;
  padding: 8px;
  border-radius: 8px;
  background: #fef3c7;
  color: #92400e;
  font-size: 11px;
}

.sf-why-ok {
  margin: 10px 0 0;
  padding: 8px;
  border-radius: 8px;
  background: #ecfdf5;
  color: #065f46;
  font-size: 11px;
}

.sf-why-verdict {
  margin: 8px 0 0;
  color: #4b5563;
  font-size: 11px;
}

.sf-chunk-context {
  margin: 0 0 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sf-chunk-row {
  padding: 8px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fff;
  font-size: 11px;
}

.sf-chunk-type {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 999px;
  background: #ede9fe;
  color: #5b21b6;
  font-size: 10px;
  font-weight: 700;
}

.sf-chunk-text {
  margin-top: 6px;
  white-space: pre-wrap;
  word-break: break-word;
  color: #374151;
}

.sf-chunk-sim {
  margin-top: 4px;
  color: #6b7280;
  font-weight: 600;
}

.sf-why-list-hint {
  margin: 8px 0 0;
  padding: 8px;
  border-radius: 8px;
  background: #eff6ff;
  color: #1e40af;
  font-size: 11px;
}

#library-modal {
  align-items: flex-start;
  padding-top: 32px;
  padding-bottom: 32px;
}

#library-modal .sf-modal__panel {
  width: min(520px, calc(100vw - 48px));
  max-height: none;
  overflow: visible;
  transition: width 0.22s ease;
}

#library-modal .sf-modal__panel.sf-library-modal--expanded {
  width: min(560px, calc(100vw - 32px));
}

#library-modal .sf-library-topic-list {
  max-height: min(200px, 30vh);
  overflow: auto;
}

#library-modal .sf-modal__panel.sf-library-modal--expanded .sf-library-topic-list {
  max-height: min(140px, 22vh);
}

.sf-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.sf-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
}

.sf-modal__panel {
  position: relative;
  width: min(460px, 100%);
  max-height: min(80vh, 640px);
  overflow: auto;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--sf-border);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.18);
  padding: 24px;
}

.sf-modal__panel h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

.sf-modal__hint {
  margin: 0 0 16px;
  color: var(--sf-muted);
  font-size: 14px;
}

.sf-modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

.sf-library-topic-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 240px;
  overflow: auto;
  margin-bottom: 12px;
}

.sf-library-topic-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--sf-border);
  border-radius: 10px;
  background: #fff;
  text-align: left;
  cursor: pointer;
}

.sf-library-topic-option:hover {
  border-color: #c7d2fe;
}

.sf-library-topic-option--selected {
  border-color: var(--sf-primary);
  background: rgba(79, 70, 229, 0.06);
}

.sf-library-topic-option__title {
  font-weight: 600;
  color: var(--sf-text);
}

.sf-library-topic-option__meta {
  font-size: 12px;
  color: var(--sf-muted);
  margin-top: 2px;
}

.sf-library-create-form__heading {
  font-size: 13px;
  font-weight: 700;
  color: var(--sf-text);
  margin-bottom: 2px;
}

.sf-library-create-toggle {
  width: 100%;
  justify-content: center;
  margin-bottom: 8px;
}

.sf-library-create-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  padding: 12px;
  border: 1px solid var(--sf-border);
  border-radius: 10px;
  background: #fff;
}

.sf-library-add-topic {
  width: 100%;
  justify-content: center;
  margin-bottom: 16px;
  border: 1px dashed var(--sf-border);
  border-radius: 10px;
  padding: 10px;
}

.sf-library-document-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
  padding: 12px;
  border: 1px solid var(--sf-border);
  border-radius: 10px;
  background: #f8fafc;
}

.sf-library-document-form label,
.sf-library-create-form label {
  font-size: 12px;
  font-weight: 600;
  color: var(--sf-muted);
}

.sf-library-create-form input,
.sf-library-create-form textarea,
.sf-library-document-form input,
.sf-library-document-form textarea {
  width: 100%;
  border: 1px solid var(--sf-border);
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
  resize: vertical;
}

.sf-library-color-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sf-library-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.18);
  cursor: pointer;
  padding: 0;
}

.sf-library-color-swatch--selected {
  outline: 2px solid #111827;
  outline-offset: 1px;
}

.sf-library-topic-color {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.sf-library-empty {
  padding: 12px;
  color: var(--sf-muted);
  font-size: 14px;
  text-align: center;
  border: 1px dashed var(--sf-border);
  border-radius: 10px;
}