/* EduResource ZA - Enhanced Study Reader Styles (3-Pane Workspace, Exam Timer & Dock) */
.reader-page main {
  max-width: none !important;
  padding: 20px 24px !important;
}

.reader-heading {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.reader-heading h1 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 4px 0 6px;
  color: var(--edu-text);
}

.reader-heading p {
  font-size: 13px;
  margin: 0;
  color: var(--edu-muted);
}

.reader-header-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

/* Layout Switcher */
.reader-layout-selector {
  display: inline-flex;
  background: var(--edu-card);
  border: 1px solid var(--edu-line);
  border-radius: 9px;
  padding: 3px;
  gap: 2px;
}

.layout-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  background: transparent;
  border: 0;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--edu-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.layout-btn:hover {
  color: var(--edu-text);
  background: rgba(0, 0, 0, 0.04);
}

.dark .layout-btn:hover {
  background: rgba(255, 255, 255, 0.06);
}

.layout-btn.is-active {
  background: var(--edu-primary, #d6073b);
  color: #fff !important;
  box-shadow: 0 2px 5px rgba(214, 7, 59, 0.25);
}

/* Exam Timer Widget */
.reader-timer-bar {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--edu-card);
  border: 1px solid var(--edu-line);
  border-radius: 9px;
  padding: 4px 10px;
}

.timer-display {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--edu-text);
}

.timer-controls {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.timer-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  border: 1px solid var(--edu-line);
  background: var(--edu-bg, #f8fafc);
  color: var(--edu-text);
  cursor: pointer;
  padding: 0;
  transition: background 0.15s ease;
}

.timer-action-btn:hover {
  background: var(--edu-line);
  color: var(--edu-primary);
}

.reader-timer-bar select {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 6px;
  border-radius: 6px;
  border: 1px solid var(--edu-line);
  background: var(--edu-bg);
  color: var(--edu-text);
  cursor: pointer;
}

.reader-find-paper-btn {
  font-size: 12px;
  padding: 7px 12px;
}

.reader-timer-bar.is-running {
  border-color: #10b981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.reader-timer-bar.is-running .timer-display {
  color: #059669;
}

.dark .reader-timer-bar.is-running .timer-display {
  color: #34d399;
}

.reader-timer-bar.is-warning {
  border-color: #ef4444;
  box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.25);
  animation: timer-pulse 1.2s infinite ease-in-out;
}

.reader-timer-bar.is-warning .timer-display {
  color: #dc2626;
}

@keyframes timer-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(0.99); }
}

/* Exam Finish Dialog */
.exam-finish-dialog {
  border: 1px solid var(--edu-line, #cbd5e1);
  border-radius: 24px;
  padding: 0;
  max-width: 520px;
  width: calc(100vw - 32px);
  background: var(--edu-card, #ffffff);
  box-shadow: 0 25px 80px -15px rgba(0, 0, 0, 0.35);
  color: var(--edu-text, #0f172a);
}

.exam-finish-dialog::backdrop {
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
}

.exam-finish-card {
  position: relative;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.exam-finish-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: transparent;
  border: none;
  font-size: 24px;
  line-height: 1;
  color: var(--edu-muted, #64748b);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
}

.exam-finish-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #be123c;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.dark .exam-finish-badge {
  background: rgba(225, 29, 72, 0.15);
  border-color: rgba(225, 29, 72, 0.3);
  color: #fb7185;
}

.exam-finish-buddy {
  margin-bottom: 12px;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.12));
}

.exam-finish-card h2 {
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 6px;
  color: inherit;
}

.exam-finish-desc {
  font-size: 14px;
  font-weight: 700;
  color: #d6073b;
  margin: 0 0 8px;
}

.dark .exam-finish-desc {
  color: #fda4af;
}

.exam-finish-sub {
  font-size: 13px;
  line-height: 1.5;
  color: var(--edu-muted, #64748b);
  margin: 0 0 20px;
}

.exam-score-box {
  width: 100%;
  background: var(--edu-bg, #f8fafc);
  border: 1px solid var(--edu-line, #cbd5e1);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 20px;
}

.dark .exam-score-box {
  background: #1e293b;
  border-color: #334155;
}

.exam-score-inputs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 10px;
}

.exam-score-inputs label {
  display: flex;
  flex-direction: column;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--edu-muted, #64748b);
  gap: 4px;
  text-align: left;
}

.exam-score-inputs input {
  width: 90px;
  height: 42px;
  font-size: 18px;
  font-weight: 800;
  text-align: center;
  border: 1px solid var(--edu-line, #cbd5e1);
  border-radius: 10px;
  background: var(--edu-card, #ffffff);
  color: var(--edu-text, #0f172a);
}

.dark .exam-score-inputs input {
  background: #0f172a;
  border-color: #475569;
  color: #f8fafc;
}

.exam-score-slash {
  font-size: 24px;
  font-weight: 700;
  color: var(--edu-muted, #64748b);
  margin-top: 18px;
}

.exam-score-preview {
  font-size: 13px;
  font-weight: 600;
  color: var(--edu-muted, #64748b);
  min-height: 24px;
}

.exam-finish-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.exam-save-btn {
  width: 100%;
  min-height: 46px;
  padding: 12px 20px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, #d6073b, #be123c);
  color: #ffffff;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(214, 7, 59, 0.3);
  transition: all 0.2s ease;
}

.exam-save-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, #be123c, #9f1239);
  transform: translateY(-1px);
}

.exam-save-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.exam-review-btn {
  width: 100%;
  min-height: 42px;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid var(--edu-line, #cbd5e1);
  background: transparent;
  color: var(--edu-text, #0f172a);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease;
}

.dark .exam-review-btn {
  border-color: #334155;
  color: #f1f5f9;
}

.exam-review-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.dark .exam-review-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.exam-finish-status {
  font-size: 12.5px;
  font-weight: 600;
  margin: 12px 0 0;
  min-height: 20px;
}

/* Collection Picker */
.reader-picker {
  display: grid;
  grid-template-columns: auto minmax(110px, 1fr) auto minmax(160px, 2.5fr);
  gap: 10px;
  align-items: center;
  background: var(--edu-card);
  border: 1px solid var(--edu-line);
  padding: 14px 16px;
  border-radius: 12px;
  margin-bottom: 16px;
}

.reader-picker label {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--edu-text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.reader-picker input,
.reader-picker select {
  min-width: 0;
  font-size: 12px;
  padding: 8px 10px;
  border: 1px solid var(--edu-line);
  border-radius: 8px;
  background: var(--edu-bg);
  color: var(--edu-text);
}

.reader-picker p {
  grid-column: 1/-1;
  margin: 2px 0 0;
  font-size: 11px;
}

.reader-picker .reader-auto-label {
  grid-column: 1/-1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  text-transform: none;
  cursor: pointer;
}

.reader-auto-label input {
  width: 16px;
  height: 16px;
  accent-color: #d6073b;
}

/* Mobile Tabs */
.reader-search-results { margin: -5px 0 16px; padding: 15px; border: 1px solid var(--edu-line); border-radius: 14px; background: var(--edu-card); }
.reader-search-results[hidden] { display: none !important; }
.reader-search-results-head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; margin-bottom: 10px; font-size: 12px; }
.reader-search-results-head strong { font-size: 14px; color: var(--edu-text); }
.reader-search-results-head span { color: var(--edu-muted); }
.reader-search-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 8px; max-height: 260px; overflow: auto; }
.reader-search-card { text-align: left; padding: 10px 12px; border: 1px solid var(--edu-line); border-radius: 9px; background: var(--edu-bg); color: var(--edu-text); cursor: pointer; }
.reader-search-card:hover,.reader-search-card:focus-visible,.reader-search-card.is-selected { border-color: #be123c; background: #fff5f7; outline: none; }
.reader-search-card strong { display: block; font-size: 11px; line-height: 1.35; overflow-wrap: anywhere; }
.reader-search-card span { display: block; margin-top: 5px; font-size: 10px; color: var(--edu-muted); }
.reader-preview-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  margin: 0 0 14px;
  border: 1px solid #f4becb;
  border-radius: 13px;
  background: linear-gradient(110deg, #fff5f7, #fff);
}
.reader-preview-bar[hidden] { display: none !important; }
.reader-preview-copy { min-width: 0; display: grid; gap: 3px; }
.reader-preview-copy strong { color: #9f1239; font-size: 13px; }
.reader-preview-copy span { color: var(--edu-muted); font-size: 11px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.reader-preview-actions { display: flex; gap: 8px; flex-shrink: 0; }
.reader-preview-actions button { padding: 8px 12px; border-radius: 8px; border: 1px solid #be123c; background: #be123c; color: #fff; font-size: 11px; font-weight: 700; cursor: pointer; }
.reader-preview-actions button + button { background: #fff; color: #9f1239; }
.reader-preview-actions button[hidden] { display: none !important; }
.reader-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  background: var(--edu-card);
  border: 1px solid var(--edu-line);
  border-radius: 12px;
  padding: 6px;
  flex-wrap: wrap;
}

.reader-tabs [role="tab"] {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--edu-muted);
  cursor: pointer;
  transition: all 0.15s ease;
}

.reader-tabs [role="tab"]:hover {
  color: var(--edu-text);
  background: rgba(0, 0, 0, 0.04);
}

.dark .reader-tabs [role="tab"]:hover {
  background: rgba(255, 255, 255, 0.06);
}

.reader-tabs [role="tab"][aria-selected="true"] {
  background: var(--edu-primary, #d6073b);
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(214, 7, 59, 0.28);
}

.reader-tabs #tab-ai {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 8px;
  border: 1px solid #f4becb;
  background: linear-gradient(135deg, #be123c, #9f1239);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(190, 18, 60, 0.25);
  transition: all 0.15s ease;
}

.reader-tabs #tab-ai:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(190, 18, 60, 0.35);
}

/* Match the workspace selector's specificity so both themes retain readable text. */
.reader-page .reader-tabs #tab-ai {
  background: #be123c;
  color: #fff;
  border-color: #be123c;
}

/* Workspace Grid */
.reader-workspace {
  display: grid;
  gap: 14px;
  align-items: start;
  transition: grid-template-columns 0.2s ease;
}

/* 3-Pane Layout */
.reader-workspace[data-layout="3-pane"] {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.15fr) 360px;
}

/* Split Layout */
.reader-workspace[data-layout="split"] {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}
.reader-workspace[data-layout="split"] .reader-ai {
  display: none !important;
}

/* Focus Paper Layout */
.reader-workspace[data-layout="focus-paper"] {
  grid-template-columns: 1fr;
}
.reader-workspace[data-layout="focus-paper"] #pane-memo,
.reader-workspace[data-layout="focus-paper"] #pane-ai {
  display: none !important;
}

/* Focus Memo Layout */
.reader-workspace[data-layout="focus-memo"] {
  grid-template-columns: 1fr;
}
.reader-workspace[data-layout="focus-memo"] #pane-paper,
.reader-workspace[data-layout="focus-memo"] #pane-ai {
  display: none !important;
}

.reader-workspace.ai-hidden {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}
.reader-workspace.ai-hidden .reader-ai {
  display: none !important;
}

.reader-pane {
  display: flex !important;
  flex-direction: column !important;
  min-width: 0;
  border: 1px solid var(--edu-line);
  background: var(--edu-card);
  border-radius: 13px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.reader-ai {
  min-width: 0;
  border: 1px solid var(--edu-line);
  background: var(--edu-card);
  border-radius: 13px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

/* Pane Column Headers matching reference UI */
.pane-column-header {
  flex-shrink: 0 !important;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: #f8fafc;
  border-bottom: 1px solid var(--edu-line, #e2e8f0);
}

.dark .pane-column-header {
  background: #0f172a;
  border-bottom-color: #334155;
}

.pane-column-header h2 {
  margin: 0;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #1e293b;
}

.dark .pane-column-header h2 {
  color: #f1f5f9;
}

.pane-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-reveal-memo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: #0284c7;
  color: #ffffff !important;
  border: 1px solid #0284c7;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(2, 132, 199, 0.25);
  transition: all 0.15s ease;
}

.btn-reveal-memo:hover {
  background: #0369a1;
  border-color: #0369a1;
  transform: translateY(-1px);
}

/* Hide Reveal Memo button when already in split view */
.reader-workspace[data-layout="split"] .btn-reveal-memo {
  display: none !important;
}

/* Pane Toolbars */
.pane-toolbar {
  padding: 10px 14px;
  border-bottom: 1px solid var(--edu-line);
  background: var(--edu-bg);
}

.pane-toolbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.pane-toolbar label {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--edu-text);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.pane-nav-tools {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pane-page-jump {
  width: 48px;
  font-size: 11px;
  padding: 3px 6px;
  border-radius: 5px;
  border: 1px solid var(--edu-line);
  background: var(--edu-card);
  color: var(--edu-text);
  text-align: center;
}

.button-sm {
  font-size: 10px !important;
  padding: 4px 8px !important;
  border-radius: 5px !important;
  line-height: 1.2 !important;
}

.pane-toolbar select {
  width: 100%;
  font-size: 12px;
  padding: 8px 10px;
  border-radius: 7px;
  border: 1px solid var(--edu-line);
  background: var(--edu-card);
  color: var(--edu-text);
}

/* PDF Host Frame & DearFlip Container */
.pdf-host {
  height: clamp(520px, calc(100vh - 90px), 1200px);
  height: clamp(520px, calc(100dvh - 90px), 1200px);
  min-height: 520px;
  background: #52525b;
  position: relative;
  overflow: hidden;
}

.dark .pdf-host {
  background: #27272a;
}

.pdf-host .df-container,
.pdf-host .df-inline-book {
  width: 100% !important;
  height: 100% !important;
  min-height: 100% !important;
}

.pdf-host iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.reader-empty {
  padding: 60px 20px;
  text-align: center;
  color: #cbd5e1;
}

.reader-empty > span {
  display: grid;
  place-items: center;
  background: var(--edu-card);
  border: 1px solid var(--edu-line);
  border-radius: 12px;
  width: 52px;
  height: 60px;
  margin: 0 auto 20px;
  font-size: 22px;
  font-weight: 800;
  color: var(--edu-primary, #d6073b);
  box-shadow: 0 4px 10px rgba(0,0,0,0.04);
}

.reader-empty h2 {
  font-size: 16px;
  margin: 0 0 6px;
  color: var(--edu-text);
}

.reader-empty p {
  font-size: 12px;
  margin: 0;
  max-width: 280px;
  margin: 0 auto;
}

/* Dock Tabs */
.dock-tabs {
  display: flex;
  background: var(--edu-bg);
  border-bottom: 1px solid var(--edu-line);
  padding: 4px 6px;
  gap: 4px;
}

.dock-tab {
  flex: 1;
  padding: 7px 6px;
  background: transparent;
  border: 0;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--edu-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.dock-tab:hover {
  color: var(--edu-text);
}

.dock-tab.is-active {
  background: var(--edu-card);
  color: var(--edu-primary, #d6073b);
  font-weight: 700;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

/* Dock Content */
.reader-ai {
  height: calc(74vh + 60px);
  max-height: 850px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.dock-content {
  padding: 16px;
  flex: 1;
}

.reader-ai-title {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.reader-ai-title img {
  border-radius: 10px;
}

.reader-ai-title h2 {
  font-size: 14px;
  font-weight: 700;
  margin: 0;
  color: var(--edu-text);
}

.reader-ai-title p {
  font-size: 11px;
  color: var(--edu-muted);
  margin: 0;
}

#reader-context {
  font-size: 11px;
  margin: 0 0 14px;
  background: rgba(0, 0, 0, 0.03);
  padding: 6px 10px;
  border-radius: 6px;
  overflow-wrap: anywhere;
}

.dark #reader-context {
  background: rgba(255, 255, 255, 0.04);
}

.explanation-depth-picker {
  margin-bottom: 12px;
}

.explanation-depth-picker label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--edu-text);
}

.explanation-depth-picker select {
  width: 100%;
  font-size: 11px;
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--edu-line);
  background: var(--edu-bg);
  color: var(--edu-text);
}

#reader-ai-form label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--edu-text);
}

#reader-ai-form textarea {
  width: 100%;
  min-height: 80px;
  font-size: 12px;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--edu-line);
  background: var(--edu-bg);
  color: var(--edu-text);
  margin-bottom: 12px;
  box-sizing: border-box;
  font-family: inherit;
  resize: vertical;
}

.reader-note {
  font-size: 10px;
  color: var(--edu-muted);
  margin: 0 0 12px;
  line-height: 1.4;
}

#reader-ask {
  width: 100%;
  padding: 9px;
  font-size: 12px;
  font-weight: 700;
}

.button-ghost-sm {
  display: inline-block;
  font-size: 11px;
  padding: 6px 10px;
  text-align: center;
  background: transparent;
  border: 1px solid var(--edu-line);
  border-radius: 6px;
  color: var(--edu-muted);
  text-decoration: none;
  margin-top: 10px;
}

.button-ghost-sm:hover {
  color: var(--edu-text);
  border-color: var(--edu-primary);
}

.reader-ai .answer {
  font-size: 12px;
  line-height: 1.55;
  padding: 14px;
  background: rgba(214, 7, 59, 0.04);
  border: 1px solid rgba(214, 7, 59, 0.15);
  border-radius: 8px;
  margin-top: 14px;
  white-space: pre-wrap;
  color: var(--edu-text);
}

#reader-note-save {
  margin-top: 10px;
}

/* Scratchpad View */
.scratchpad-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.scratchpad-header h3 {
  font-size: 13px;
  font-weight: 700;
  margin: 0;
  color: var(--edu-text);
}

.scratchpad-status {
  font-size: 10px;
  color: #16a34a;
  font-weight: 600;
}

.scratchpad-desc {
  font-size: 11px;
  color: var(--edu-muted);
  margin: 0 0 12px;
}

.scratchpad-input {
  width: 100%;
  height: 280px;
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  padding: 10px;
  border: 1px solid var(--edu-line);
  border-radius: 8px;
  background: var(--edu-bg);
  color: var(--edu-text);
  box-sizing: border-box;
  resize: vertical;
  line-height: 1.5;
}

.scratchpad-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

/* Pacing View */
.pacing-header h3 {
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--edu-text);
}

.pacing-header p {
  font-size: 11px;
  margin: 0 0 12px;
}

.pacing-inputs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

.pacing-inputs label {
  display: grid;
  gap: 4px;
  color: var(--edu-muted);
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.pacing-inputs input {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: 7px 8px;
  border: 1px solid var(--edu-line);
  border-radius: 7px;
  background: var(--edu-bg);
  color: var(--edu-text);
  font: 700 12px/1.2 ui-monospace, monospace;
}

.pacing-inputs input:focus {
  border-color: #be123c;
  outline: 2px solid rgba(190, 18, 60, .12);
}

.pacing-result {
  display: grid;
  gap: 2px;
  margin-bottom: 12px;
  padding: 10px 12px;
  border: 1px solid rgba(190, 18, 60, .22);
  border-radius: 9px;
  background: rgba(190, 18, 60, .05);
}

.pacing-result span,.pacing-result small { color: var(--edu-muted); font-size: 10px; }
.pacing-result strong { color: var(--edu-primary, #be123c); font-size: 17px; }

.pacing-table-wrap {
  overflow-x: auto;
  margin-bottom: 12px;
}

.pacing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.pacing-table th,
.pacing-table td {
  padding: 7px 8px;
  text-align: left;
  border-bottom: 1px solid var(--edu-line);
}

.pacing-table th {
  font-weight: 700;
  color: var(--edu-muted);
  font-size: 10px;
  text-transform: uppercase;
}

.pacing-table td:last-child {
  font-family: ui-monospace, monospace;
  font-weight: 600;
  color: var(--edu-primary);
}

.pacing-advice {
  font-size: 11px;
  line-height: 1.5;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 8px;
  padding: 10px;
  color: var(--edu-text);
}

.reader-footer {
  font-size: 11px;
  color: var(--edu-muted);
  margin-top: 18px;
}

/* Responsive Rules */
@media (max-width: 1250px) {
  .reader-workspace[data-layout="3-pane"] {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .reader-workspace[data-layout="3-pane"] .reader-ai {
    grid-column: 1 / -1;
    max-height: none;
    height: auto;
  }
}

@media (max-width: 768px) {
  .reader-preview-bar { align-items: stretch; flex-direction: column; }
  .reader-preview-actions button { flex: 1; }
  .reader-page main {
    padding: 16px 12px !important;
  }
  
  .reader-heading h1 {
    font-size: 22px;
  }
  
  .reader-layout-selector {
    display: none;
  }
  
  .reader-tabs {
    display: flex;
    padding: 4px;
    gap: 4px;
  }
  
  .reader-tabs [role="tab"] {
    flex: 1 1 calc(33.3% - 4px);
    padding: 8px 6px;
    font-size: 11px;
    font-weight: 700;
    background: var(--edu-card);
    border: 1px solid var(--edu-line);
    border-radius: 7px;
    color: var(--edu-text);
    cursor: pointer;
    justify-content: center;
  }
  
  .reader-tabs [aria-selected="true"] {
    background: var(--edu-primary, #d6073b);
    color: #fff;
    border-color: var(--edu-primary, #d6073b);
  }
  
  .reader-tabs #tab-ai {
    width: 100%;
    margin-left: 0;
    justify-content: center;
    padding: 8px;
    font-size: 12px;
  }
  
  .reader-workspace,
  .reader-workspace[data-layout="3-pane"],
  .reader-workspace[data-layout="split"],
  .reader-workspace.ai-hidden {
    display: block;
  }
  
  .reader-workspace .reader-pane,
  .reader-workspace .reader-ai {
    display: none;
  }
  
  .reader-workspace[data-active="paper"] #pane-paper,
  .reader-workspace[data-active="memo"] #pane-memo,
  .reader-workspace[data-active="ai"] #pane-ai {
    display: block !important;
  }

  .reader-workspace[data-active="split"] #pane-paper,
  .reader-workspace[data-active="split"] #pane-memo {
    display: block !important;
    margin-bottom: 14px;
  }
  
  .pdf-host {
    height: 62vh;
    min-height: 360px;
  }
  
  .reader-picker {
    grid-template-columns: 1fr;
  }
}

/* Reader assistant: a compact, expandable overlay that leaves both PDFs usable. */
body.reader-page .edu-buddy { display: none !important; }
body.reader-page .reader-workspace[data-layout="3-pane"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
body.reader-page .reader-workspace[data-layout="focus-paper"] #pane-ai,
body.reader-page .reader-workspace[data-layout="focus-memo"] #pane-ai,
body.reader-page .reader-workspace[data-layout="split"] #pane-ai { display: none; }
.reader-assistant-launcher { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 250; display: flex; align-items: center; gap: 8px; max-width: calc(100vw - 32px); padding: 6px 11px 6px 5px; border: 1px solid #f2bcc9; border-radius: 999px; background: #fff; color: #9f1239; box-shadow: 0 10px 32px #0f172a30; font: 800 12px/1.2 'Plus Jakarta Sans',system-ui,sans-serif; cursor: pointer; }
.reader-assistant-launcher img { object-fit: contain; }
.reader-assistant-launcher b { color: #d6073b; }
.reader-assistant-launcher[aria-expanded="true"] { display: none; }
body.reader-page #pane-ai[data-state="closed"] { display: none !important; }
body.reader-page #pane-ai[data-state="compact"],body.reader-page #pane-ai[data-state="maximized"] { position: fixed; right: 16px; bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 251; display: flex !important; flex-direction: column; width: min(390px, calc(100vw - 32px)); height: min(610px, calc(100dvh - 32px)); max-height: none; overflow: hidden; border: 1px solid #f0c5d1; border-radius: 18px; background: var(--edu-card); box-shadow: 0 18px 60px #0f172a4d; }
body.reader-page #pane-ai[data-state="maximized"] { width: min(720px, calc(100vw - 32px)); height: calc(100dvh - 32px); }
.reader-assistant-chrome { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; background: linear-gradient(115deg,#52102a,#af123e); color: #fff; }
.reader-assistant-chrome > div:first-child { display: grid; grid-template-columns: auto 1fr; column-gap: 8px; align-items: center; }
.reader-assistant-chrome strong { font-size: 13px; }
.reader-assistant-chrome small { grid-column: 2; color: #ffe0e7; font-size: 10px; }
.reader-assistant-presence { width: 9px; height: 9px; border-radius: 50%; background: #68e9ae; box-shadow: 0 0 0 3px #ffffff35; }
.reader-assistant-controls { display: flex; gap: 5px; }
.reader-assistant-controls button { width: 30px; height: 30px; border: 1px solid #ffffff70; border-radius: 8px; background: #ffffff20; color: #fff; font-size: 18px; cursor: pointer; }
.reader-assistant-controls button:hover,.reader-assistant-controls button:focus-visible { background: #ffffff40; outline: 2px solid #fff; }
body.reader-page #pane-ai .dock-tabs { padding: 7px; flex: none; }
body.reader-page #pane-ai .dock-content { min-height: 0; }
body.reader-page #dock-view-ai:not([hidden]) { display: flex; flex-direction: column; gap: 9px; overflow: hidden; padding: 10px 12px 12px; }
body.reader-page #dock-view-ai[hidden] { display: none !important; }
.reader-ai-context { display: flex; gap: 8px; align-items: center; padding: 7px 9px; border: 1px solid var(--edu-line); border-radius: 9px; background: var(--edu-bg); }
.reader-ai-context-dot { flex: none; width: 7px; height: 7px; border-radius: 50%; background: #d6073b; }
body.reader-page #reader-context { margin: 0; padding: 0; background: none; font-size: 10px; line-height: 1.35; }
.reader-chat { min-height: 80px; flex: 1; display: flex; flex-direction: column; gap: 11px; overflow-y: auto; padding: 4px 2px 8px; overscroll-behavior: contain; }
.reader-chat-message { max-width: 94%; padding: 9px 11px; border-radius: 12px; background: var(--edu-bg); border: 1px solid var(--edu-line); color: var(--edu-text); overflow-wrap: anywhere; }
.reader-chat-message.is-user { align-self: flex-end; background: #fff1f4; border-color: #f2bcc9; }
.reader-chat-message strong { display: block; margin-bottom: 3px; font-size: 10px; color: #a7103a; }
.reader-chat-message p { margin: 0; font-size: 11px; line-height: 1.55; white-space: pre-wrap; }
body.reader-page #reader-ai-form { flex: none; }
body.reader-page #reader-ai-form .reader-attach-toggle { display: flex; align-items: center; gap: 6px; margin: 0; font-size: 10px; font-weight: 700; }
.reader-attach-toggle input { accent-color: #be123c; }
.reader-attach-status { margin: 2px 0 7px; font-size: 9px; line-height: 1.3; color: var(--edu-muted); }
.reader-chat-options { margin: 0 0 7px; padding: 6px 8px; border: 1px solid var(--edu-line); border-radius: 8px; font-size: 10px; }
.reader-chat-options summary { cursor: pointer; font-weight: 700; color: var(--edu-text); }
.reader-chat-options label { margin-top: 7px; }
.reader-chat-options select { width: 100%; padding: 6px; border: 1px solid var(--edu-line); border-radius: 6px; background: var(--edu-bg); color: var(--edu-text); }
body.reader-page #reader-ai-form .reader-chat-options textarea { min-height: 62px; margin-bottom: 0; }
.reader-chat-composer { display: flex; gap: 6px; align-items: flex-end; padding: 5px; border: 1px solid #e3a7b8; border-radius: 11px; background: var(--edu-card); }
body.reader-page #reader-ai-form .reader-chat-composer textarea { flex: 1; min-height: 44px; max-height: 95px; margin: 0; padding: 8px; border: 0; background: transparent; resize: vertical; font-size: 12px; }
body.reader-page #reader-ai-form .reader-chat-composer textarea:focus { outline: none; }
body.reader-page #reader-ask { flex: none; width: 34px; height: 34px; padding: 0; border: 0; border-radius: 8px; background: #be123c; color: #fff; font-size: 15px; }
.reader-assistant-full-link { align-self: flex-start; color: #9f1239; font-size: 10px; font-weight: 700; text-decoration: none; }
body.reader-page #reader-note-save:not([hidden]) { align-self: flex-start; margin: 0; font-size: 10px; }
@media (max-width: 768px) {
  body.reader-page #pane-ai[data-state="compact"],body.reader-page #pane-ai[data-state="maximized"] { right: 8px; bottom: calc(8px + env(safe-area-inset-bottom)); width: calc(100vw - 16px); height: min(620px, calc(100dvh - 16px)); }
  body.reader-page #pane-ai[data-state="maximized"] { height: calc(100dvh - 16px); }
  body.reader-page .reader-workspace[data-layout="3-pane"] { display: block; }
  .reader-assistant-launcher { right: 10px; bottom: calc(80px + env(safe-area-inset-bottom)) !important; }
}

/* ─── PRODUCTION FIXES v20260919 ─────────────────────────────────────────── */

/* Fix: Timer sits at bottom-right — A+ launcher goes ABOVE it on mobile */
.reader-assistant-launcher {
  bottom: calc(80px + env(safe-area-inset-bottom)) !important;
}

/* Fix: Also push study-tools.js timer widget out of the way on reader page */
body.reader-page .edu-timer-widget {
  display: none !important;
}

/* Fix: Edu-buddy float hidden on reader */
body.reader-page .edu-buddy,
body.reader-page .edu-buddy-launch {
  display: none !important;
}

/* Enhancement: Smooth entry animation for A+ assistant panel */
@keyframes panelSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
body.reader-page #pane-ai[data-state="compact"],
body.reader-page #pane-ai[data-state="maximized"] {
  animation: panelSlideUp 0.22s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Enhancement: Copilot-pill launcher glow on hover */
.reader-assistant-launcher {
  transition: box-shadow 0.2s ease, transform 0.15s ease !important;
  position: fixed;
}
.reader-assistant-launcher:hover {
  box-shadow: 0 14px 40px rgba(214, 7, 59, 0.35) !important;
  transform: translateY(-2px) !important;
}
.reader-assistant-launcher:active {
  transform: translateY(0) !important;
}

/* Enhancement: launcher live/active pulse dot */
.reader-assistant-launcher::before {
  content: '';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 2px #fff;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}
.reader-assistant-launcher[aria-expanded="true"]::before { display: none; }

/* Enhancement: dark mode chat messages */
.dark .reader-chat-message { background: var(--edu-bg); border-color: var(--edu-line); }
.dark .reader-chat-message.is-user { background: #2d1a24; border-color: #5c2f42; }
.dark .reader-chat-message.is-user strong { color: #fda4af; }
.dark .reader-ai-context { background: var(--edu-bg); }
.dark .reader-preview-bar { background: #1a1228; border-color: #5c2f42; }
.dark .reader-preview-copy strong { color: #fda4af; }

/* Enhancement: search results look premium */
.reader-search-card {
  transition: all 0.15s ease;
}
.reader-search-card:hover {
  background: #fff0f4 !important;
  border-color: #be123c !important;
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(214,7,59,0.08);
}
.dark .reader-search-card:hover {
  background: #2d1a24 !important;
  border-color: #9f1239 !important;
}

/* Enhancement: Preview bar actions feel premium */
.reader-preview-actions button {
  transition: all 0.15s ease;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.reader-preview-actions button:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(190, 18, 60, 0.3);
}

/* Enhancement: picker focus states */
.reader-picker input:focus,
.reader-picker select:focus {
  border-color: #be123c;
  outline: none;
  box-shadow: 0 0 0 3px rgba(214, 7, 59, 0.12);
}

/* Enhancement: assistant chrome gradient */
.reader-assistant-chrome {
  background: linear-gradient(115deg, #4a0d24 0%, #9f1239 50%, #c2185b 100%) !important;
}

/* Enhancement: scrollbar styling in chat */
.reader-chat::-webkit-scrollbar { width: 3px; }
.reader-chat::-webkit-scrollbar-thumb { background: #f2bcc9; border-radius: 3px; }
.dark .reader-chat::-webkit-scrollbar-thumb { background: #5c2f42; }

/* Enhancement: assistant full link */
.reader-assistant-full-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border: 1px solid #f2bcc9;
  border-radius: 7px;
  font-size: 10px;
  font-weight: 700;
  color: #9f1239;
  text-decoration: none;
  transition: all 0.15s ease;
  background: #fff5f7;
  margin-top: 6px;
}
.reader-assistant-full-link:hover { background: #ffe4ea; border-color: #be123c; }
.dark .reader-assistant-full-link { background: #2d1a24; border-color: #5c2f42; color: #fda4af; }

/* Fix: mobile picker */
@media (max-width: 600px) {
  .reader-picker { grid-template-columns: 1fr !important; gap: 8px; }
  .reader-header-actions { gap: 8px; flex-wrap: wrap; }
  .reader-timer-bar { flex-wrap: wrap; gap: 6px; }
}

/* Enhancement: scratchpad focus */
.scratchpad-input:focus {
  border-color: #be123c;
  outline: none;
  box-shadow: 0 0 0 3px rgba(214,7,59,0.08);
}

/* Keep the floating assistant inside the layout viewport. On desktop the
   scrollbar makes 100vw wider than the visible fixed-position area. */
body.reader-page #pane-ai[data-state="compact"] {
  left: auto;
  right: 16px;
  width: 390px;
  max-width: calc(100% - 32px);
}
body.reader-page #pane-ai[data-state="maximized"] {
  left: auto;
  right: 16px;
  width: 720px;
  max-width: calc(100% - 32px);
}
body.reader-page #reader-note-save[hidden] { display: none !important; }
@media (max-width: 768px) {
  body.reader-page #pane-ai[data-state="compact"] {
    right: 8px;
    max-width: calc(100% - 16px);
  }
  body.reader-page #pane-ai[data-state="maximized"] {
    left: 8px;
    right: 8px;
    width: auto;
    max-width: none;
  }
}

/* ─── COPILOT / GEMINI AI COMPANION & SEARCH UPGRADES ───────────────────── */

/* Board Quick Filter Pills */
.reader-board-pills-row {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}
.reader-board-pills-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--edu-muted, #64748b);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.reader-board-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.reader-board-pill {
  appearance: none;
  border: 1px solid var(--edu-line, #e2e8f0);
  background: var(--edu-card, #ffffff);
  color: var(--edu-text, #1e293b);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.reader-board-pill:hover {
  border-color: #d6073b;
  color: #d6073b;
  background: rgba(214, 7, 59, 0.04);
}
.reader-board-pill.is-active {
  background: #d6073b;
  color: #ffffff;
  border-color: #d6073b;
  box-shadow: 0 2px 8px rgba(214, 7, 59, 0.25);
}
.dark .reader-board-pill {
  background: #1e293b;
  border-color: #334155;
  color: #e2e8f0;
}
.dark .reader-board-pill.is-active {
  background: #be123c;
  border-color: #be123c;
  color: #ffffff;
}

/* Copilot Brand Tag */
.copilot-tag {
  display: inline-block;
  padding: 1px 7px;
  margin-left: 5px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ec4899, #8b5cf6);
  color: #ffffff;
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  vertical-align: middle;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Live Document Indicator */
.reader-live-doc-indicator {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 11px;
  line-height: 1.4;
  border: 1px solid var(--edu-line, #e2e8f0);
  background: var(--edu-bg, #f8fafc);
  transition: all 0.2s ease;
}
.doc-indicator-status {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.doc-indicator-status span:last-child {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.indicator-dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #94a3b8;
  box-shadow: 0 0 0 2px rgba(148, 163, 184, 0.2);
}
.reader-live-doc-indicator.is-ready {
  background: rgba(34, 197, 94, 0.08);
  border-color: rgba(34, 197, 94, 0.3);
  color: #15803d;
}
.reader-live-doc-indicator.is-ready .indicator-dot {
  background: #22c55e;
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.3);
  animation: pulse-dot 2s infinite;
}
.reader-live-doc-indicator.is-partial {
  background: rgba(234, 179, 8, 0.08);
  border-color: rgba(234, 179, 8, 0.3);
  color: #b45309;
}
.reader-live-doc-indicator.is-partial .indicator-dot {
  background: #eab308;
  box-shadow: 0 0 0 2px rgba(234, 179, 8, 0.3);
}
.reader-live-doc-indicator.is-empty {
  background: var(--edu-bg, #f8fafc);
  border-color: var(--edu-line, #e2e8f0);
  color: var(--edu-muted, #64748b);
}
.doc-shortcut-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 10px;
  border-radius: 4px;
  background: var(--edu-card, #ffffff);
  border: 1px solid var(--edu-line, #cbd5e1);
  color: var(--edu-muted, #64748b);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.dark .doc-shortcut-hint kbd {
  background: #1e293b;
  border-color: #475569;
  color: #cbd5e1;
}

/* Quick Prompts (Copilot / Gemini style chips) */
.reader-prompt-chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 0 6px;
  scrollbar-width: thin;
}
.prompt-chip {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  appearance: none;
  border: 1px solid rgba(214, 7, 59, 0.2);
  background: rgba(214, 7, 59, 0.04);
  color: #be123c;
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.prompt-chip:hover {
  background: #be123c;
  color: #ffffff;
  border-color: #be123c;
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(190, 18, 60, 0.25);
}
.dark .prompt-chip {
  background: rgba(244, 63, 94, 0.1);
  border-color: rgba(244, 63, 94, 0.25);
  color: #fda4af;
}
.dark .prompt-chip:hover {
  background: #be123c;
  color: #ffffff;
}

/* Enhanced Search Result Cards & Meta */
.reader-search-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 4px;
  font-size: 11px;
}
.reader-search-tags {
  color: var(--edu-muted, #64748b);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reader-badge-paired {
  flex-shrink: 0;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 10px;
  font-weight: 700;
  background: rgba(34, 197, 94, 0.12);
  color: #15803d;
  border: 1px solid rgba(34, 197, 94, 0.3);
}
.reader-badge-single {
  flex-shrink: 0;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 10px;
  font-weight: 600;
  background: rgba(2, 132, 199, 0.1);
  color: #0284c7;
  border: 1px solid rgba(2, 132, 199, 0.2);
}
.dark .reader-badge-paired {
  background: rgba(34, 197, 94, 0.2);
  color: #86efac;
  border-color: rgba(34, 197, 94, 0.4);
}
.dark .reader-badge-single {
  background: rgba(56, 189, 248, 0.15);
  color: #7dd3fc;
  border-color: rgba(56, 189, 248, 0.3);
}

/* Copilot Sidepanel Chrome Enhancement */
.reader-assistant-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.reader-assistant-brand strong {
  font-size: 13px;
  display: flex;
  align-items: center;
}

/* Supporting Documents Button & Dialog */
.btn-supporting-docs {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--edu-surface, #ffffff);
  color: var(--edu-text, #0f172a) !important;
  border: 1px solid var(--edu-line, #cbd5e1);
  border-radius: 7px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-supporting-docs:hover {
  background: var(--edu-muted-surface, #f8fafc);
  border-color: #0284c7;
  color: #0284c7 !important;
  transform: translateY(-1px);
}

.dark .btn-supporting-docs {
  background: #1e293b;
  color: #f1f5f9 !important;
  border-color: #334155;
}

.dark .btn-supporting-docs:hover {
  background: #334155;
  border-color: #38bdf8;
  color: #38bdf8 !important;
}

.supporting-docs-dialog {
  border: 1px solid var(--edu-line, #cbd5e1);
  border-radius: 16px;
  padding: 0;
  width: 90%;
  max-width: 600px;
  background: var(--edu-card, #ffffff);
  color: var(--edu-ink, #0f172a);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.dark .supporting-docs-dialog {
  background: #0f172a;
  border-color: #334155;
  color: #f8fafc;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.supporting-docs-dialog::backdrop {
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
}

.supporting-docs-modal-content {
  padding: 24px;
}

.supporting-docs-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.supporting-docs-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #0284c7;
}

.dark .supporting-docs-heading {
  color: #38bdf8;
}

.supporting-docs-heading h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  color: var(--edu-ink, #0f172a);
}

.dark .supporting-docs-heading h2 {
  color: #f8fafc;
}

.btn-close-dialog {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--edu-line, #cbd5e1);
  background: transparent;
  color: var(--edu-muted, #64748b);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-close-dialog:hover {
  background: #fee2e2;
  border-color: #ef4444;
  color: #ef4444;
}

.dark .btn-close-dialog {
  border-color: #334155;
  color: #94a3b8;
}

.dark .btn-close-dialog:hover {
  background: #3f1d24;
  border-color: #f43f5e;
  color: #f43f5e;
}

.supporting-docs-subtitle {
  font-size: 13px;
  color: var(--edu-muted, #64748b);
  margin: 0 0 18px 0;
}

.dark .supporting-docs-subtitle {
  color: #94a3b8;
}

.supporting-docs-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 360px;
  overflow-y: auto;
}

.supporting-doc-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid var(--edu-line, #e2e8f0);
  border-radius: 10px;
  background: var(--edu-surface, #f8fafc);
  transition: border-color 0.15s ease;
}

.dark .supporting-doc-item {
  background: #1e293b;
  border-color: #334155;
}

.supporting-doc-item:hover {
  border-color: #0284c7;
}

.supporting-doc-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.supporting-doc-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--edu-ink, #0f172a);
}

.dark .supporting-doc-title {
  color: #f8fafc;
}

.supporting-doc-badge {
  font-size: 11px;
  color: #0284c7;
  font-weight: 500;
}

.dark .supporting-doc-badge {
  color: #38bdf8;
}

.supporting-doc-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.supporting-docs-empty {
  text-align: center;
  padding: 32px 16px;
  color: var(--edu-muted, #64748b);
}

.supporting-docs-empty p {
  margin: 0 0 12px 0;
  font-size: 14px;
}

.supporting-docs-fallback-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

/* Portable PDF rendering: visible controls, independent page and zoom per pane. */
.pane-document-controls{padding:10px 12px;background:var(--edu-card,#fff);border-bottom:1px solid var(--edu-line,#cbd5e1)}
.pane-document-controls select{width:100%;min-width:0;min-height:40px;font-size:12px;color:var(--edu-ink,#172033);background:var(--edu-card,#fff);border:1px solid var(--edu-line,#cbd5e1);border-radius:7px;padding:6px}
.reader-pdf-view{display:flex;flex-direction:column;height:100%;min-height:0;color:var(--edu-ink,#172033);background:var(--edu-card,#fff)}
.reader-pdf-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;flex:none;padding:10px;border-bottom:1px solid var(--edu-line,#cbd5e1)}
.reader-pdf-controls button,.reader-pdf-controls input{min-height:36px;border:1px solid var(--edu-line,#cbd5e1);border-radius:7px;background:var(--edu-bg,#f8fafc);color:var(--edu-ink,#172033)}
.reader-pdf-controls button{min-width:36px;padding:4px 9px;font-size:20px;line-height:1;cursor:pointer}
.reader-pdf-controls button:disabled{opacity:.5;cursor:default}
.reader-pdf-controls label{display:flex;gap:4px;align-items:center;margin:0;font-size:12px;white-space:nowrap}
.reader-pdf-controls input{width:56px;padding:4px;text-align:center}
.reader-pdf-controls a{font-size:12px;font-weight:700;text-decoration:underline;color:var(--edu-ink,#172033)}
.reader-pdf-status{margin:0;padding:6px 12px;font-size:12px;line-height:1.5;flex:none;color:var(--edu-muted,#526176)}
.reader-pdf-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:12px;background:#52525b}
.reader-pdf-scroll canvas{display:block;max-width:none!important;margin:0 auto;background:#fff}
.reader-pdf-scroll canvas[hidden]{display:none}
.reader-pdf-view[data-state="error"] .reader-pdf-scroll{display:none}
.reader-page .pdf-host:has(.reader-pdf-view[data-state="error"]){height:auto!important;min-height:0!important}
.reader-pdf-view[data-state="error"] .reader-pdf-status{padding:24px;font-size:15px;line-height:1.7;max-width:70ch}
.reader-workspace .pane-column-header{flex-wrap:wrap;gap:12px}
.reader-workspace .pane-header-actions{flex-wrap:wrap;gap:8px}
.reader-workspace .pane-header-actions .button,.reader-workspace .pane-header-actions button{min-height:36px;white-space:normal}
@media(max-width:768px){body.reader-page .reader-workspace[data-layout="split"]{display:grid!important;grid-template-columns:minmax(0,1fr)!important;gap:20px}body.reader-page .pdf-host{height:min(74vh,760px);height:min(74dvh,760px);min-height:420px}}

/* PDF canvas toolbar: compact, clear fit modes and native full-screen reading. */
.reader-pdf-controls{gap:6px;align-items:center;background:var(--edu-card,#fff)}
.reader-pdf-controls .reader-pdf-button{min-width:38px;min-height:38px;padding:5px 9px;font-size:16px;font-weight:700}
.reader-pdf-controls .reader-pdf-button[data-fit]{min-width:54px;font-size:12px}
.reader-pdf-controls .reader-pdf-button[aria-pressed="true"]{border-color:#2563eb;background:#eff6ff;color:#1d4ed8;box-shadow:inset 0 0 0 1px #2563eb}
.dark .reader-pdf-controls .reader-pdf-button[aria-pressed="true"]{border-color:#60a5fa;background:#172554;color:#bfdbfe;box-shadow:inset 0 0 0 1px #60a5fa}
.reader-pdf-zoom-value{min-width:46px;text-align:center;font-size:12px;font-variant-numeric:tabular-nums;font-weight:700;color:var(--edu-ink,#172033)}
.reader-pdf-controls .reader-pdf-original{margin-left:auto;padding:8px 10px;border:1px solid var(--edu-line,#cbd5e1);border-radius:7px;background:var(--edu-bg,#f8fafc);text-decoration:none}
.reader-pdf-view:fullscreen{width:100vw;height:100vh;height:100dvh;min-height:0;background:var(--edu-card,#fff)}
.reader-pdf-view:fullscreen .reader-pdf-scroll{padding:20px;background:#353942}
.reader-pdf-view:fullscreen .reader-pdf-scroll canvas{box-shadow:0 8px 32px #0008}
.reader-pdf-view::backdrop{background:#111827}
@media(max-width:520px){.reader-pdf-controls{gap:4px;padding:7px}.reader-pdf-controls .reader-pdf-button{min-width:34px;min-height:36px;padding:4px 7px}.reader-pdf-controls label{font-size:11px}.reader-pdf-controls input{width:46px}.reader-pdf-controls .reader-pdf-original{margin-left:0;padding:7px 8px}}
@media(max-width:520px) and (max-height:600px){body.reader-page .pdf-host{height:min(70vh,420px);height:min(70dvh,420px);min-height:280px}}