/* CourseOS · Reading Cards (Phase 10B)
   Card-based reading view with 4 consumption modes.
   Overlays on top of the app, like reading.css but for
   structured page-level content. */

/* ── Full-screen overlay ─────────────────────────────── */
.rc-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--bg-secondary);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.25s ease-out;
}

/* ── Top bar ─────────────────────────────────────────── */
.rc-top-bar {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  background: var(--bg-primary);
  border-bottom: var(--border-width) solid var(--border-color);
  flex-shrink: 0;
  gap: 10px;
  min-height: 48px;
}

.rc-back-btn {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  color: var(--text-primary);
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.rc-top-info {
  flex: 1;
  min-width: 0;
}

.rc-top-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rc-top-meta {
  font-size: 11px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rc-top-progress {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--color-teal);
  background: rgba(35, 199, 175, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* ── Mode selector bar ───────────────────────────────── */
.rc-mode-bar {
  display: flex;
  padding: 8px 14px;
  gap: 6px;
  background: var(--bg-primary);
  border-bottom: var(--border-width) solid var(--border-color);
  flex-shrink: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.rc-mode-btn {
  flex: 1;
  min-width: 0;
  padding: 7px 4px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.rc-mode-btn.active {
  border-color: var(--color-teal);
  background: var(--color-teal);
  color: #fff;
}

.rc-mode-icon {
  display: block;
  font-size: 16px;
  margin-bottom: 2px;
}

/* ── Page indicator ──────────────────────────────────── */
.rc-page-indicator {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--bg-primary);
  padding: 6px 14px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: var(--border-width) solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rc-page-num {
  background: var(--gray-100);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 10px;
  color: var(--text-secondary);
}

/* ── Content area ────────────────────────────────────── */
.rc-content {
  flex: 1;
  overflow-y: auto;
  padding: 0 0 120px;
  -webkit-overflow-scrolling: touch;
}

.rc-page-block {
  padding: 16px;
  border-bottom: 1px dashed var(--gray-200);
}

.rc-paragraph {
  margin-bottom: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border-left: 3px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease;
  position: relative;
  cursor: default;
}

.rc-paragraph.rc-current {
  background: rgba(35, 199, 175, 0.08);
  border-left-color: var(--color-teal);
}

.rc-paragraph.rc-speaking {
  background: rgba(65, 180, 211, 0.08);
  border-left-color: var(--color-blue);
}

.rc-paragraph.rc-dimmed {
  opacity: 0.25;
  transition: opacity 0.4s ease;
}

.rc-paragraph-text {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-primary);
}

/* ── Course-specific typography overrides ─────────────── */
.rc-course-cisc1100 .rc-paragraph-text,
.rc-course-cisc2350 .rc-paragraph-text {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

.rc-course-theo1000 .rc-paragraph-text {
  line-height: 1.9;
}

/* ── Key Points mode (skim) ──────────────────────────── */
.rc-skim-text {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
}

.rc-skim-expand {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-teal);
  background: rgba(35, 199, 175, 0.1);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
}

.rc-skim-full {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--gray-200);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  display: none;
}

.rc-skim-full.expanded {
  display: block;
}

/* ── Chunk mode (5-min timer) ────────────────────────── */
.rc-chunk-timer {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--color-navy);
  color: #fff;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
}

.rc-chunk-time {
  font-size: 20px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.rc-chunk-progress-bar {
  height: 3px;
  background: rgba(255,255,255,0.2);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 6px;
}

.rc-chunk-progress-fill {
  height: 100%;
  background: var(--color-teal);
  border-radius: 2px;
  transition: width 1s linear;
}

.rc-chunk-break {
  text-align: center;
  padding: 24px 16px;
  background: rgba(35, 199, 175, 0.06);
  border-radius: var(--radius-md);
  margin: 16px;
}

.rc-chunk-break-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-teal);
  margin-bottom: 4px;
}

.rc-chunk-break-detail {
  font-size: 13px;
  color: var(--text-secondary);
}

.rc-chunk-continue-btn {
  margin-top: 12px;
  padding: 10px 24px;
  background: var(--color-teal);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

/* ── Bottom playback bar ─────────────────────────────── */
.rc-bottom-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--bg-primary);
  border-top: var(--border-width) solid var(--border-color);
  box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
  z-index: 1002;
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.rc-play-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--color-teal);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.rc-play-btn:active {
  transform: scale(0.95);
}

.rc-bar-info {
  flex: 1;
  min-width: 0;
}

.rc-bar-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rc-bar-progress {
  font-size: 11px;
  color: var(--text-secondary);
}

.rc-speed-btns {
  display: flex;
  gap: 3px;
}

.rc-speed-btn {
  padding: 4px 7px;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
}

.rc-speed-btn.active {
  background: var(--color-teal);
  color: #fff;
  border-color: var(--color-teal);
}

/* ── Loading / empty states ──────────────────────────── */
.rc-loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.rc-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.rc-empty-icon {
  font-size: 40px;
  margin-bottom: 8px;
}

/* ── Selection toolbar ───────────────────────────────── */
.rc-select-toolbar {
  position: absolute;
  background: var(--color-navy);
  border-radius: var(--radius-sm);
  padding: 4px;
  gap: 4px;
  display: none;
  z-index: 1003;
  box-shadow: var(--shadow-lg);
}

.rc-select-toolbar.visible {
  display: flex;
}

.rc-select-btn {
  padding: 6px 10px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.rc-select-btn:active {
  background: rgba(255,255,255,0.15);
}

/* ═══════════════════════════════════════════════════════
   PHASE 10C · Course-Specific Toolkits
   ═══════════════════════════════════════════════════════ */

/* ── Toolkit bar ─────────────────────────────────────── */
.rc-toolkit-bar {
  display: flex;
  padding: 6px 14px;
  gap: 4px;
  background: var(--bg-primary);
  border-bottom: var(--border-width) solid var(--border-color);
  flex-shrink: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.rc-tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 10px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  min-width: 52px;
  white-space: nowrap;
}

.rc-tool-btn.active {
  border-color: var(--color-purple);
  background: rgba(139, 92, 246, 0.08);
  color: var(--color-purple);
}

.rc-tool-icon {
  font-size: 16px;
  margin-bottom: 2px;
}

.rc-tool-label {
  font-size: 10px;
}

/* ── Toolkit panels ──────────────────────────────────── */
.rc-panel-open {
  max-height: 280px;
  overflow-y: auto;
  background: var(--bg-primary);
  border-bottom: var(--border-width) solid var(--border-color);
  animation: rcSlideDown 0.2s ease-out;
}

@keyframes rcSlideDown {
  from { max-height: 0; opacity: 0; }
  to { max-height: 280px; opacity: 1; }
}

.rc-panel-content {
  padding: 12px 14px;
}

.rc-panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.rc-panel-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-style: italic;
}

.rc-panel-empty {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 16px 0;
}

.rc-panel-group-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: capitalize;
  margin: 10px 0 6px;
}

.rc-panel-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 10px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
}

.rc-panel-item-text {
  flex: 1;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-primary);
}

.rc-panel-copy-btn {
  padding: 4px 8px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Symbol palette (CISC 1100) ──────────────────────── */
.rc-symbol-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.rc-symbol-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.rc-symbol-btn:active {
  background: var(--color-purple);
  color: #fff;
  border-color: var(--color-purple);
}

/* ── Formula reference (CISC 1100) ───────────────────── */
.rc-formula-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid var(--gray-100);
}

.rc-formula-text {
  flex: 1;
  font-size: 13px;
  font-family: 'Consolas', 'Courier New', monospace;
  color: var(--text-primary);
}

/* ── Code snippets (CISC 2350) ───────────────────────── */
.rc-snippet-item {
  flex-direction: column;
}

.rc-snippet-code {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 11px;
  background: #1E1E1E;
  color: #D4D4D4;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 0 0 6px;
  white-space: pre-wrap;
  line-height: 1.5;
}

/* ── Reaction picker (THEO 1000) ─────────────────────── */
.rc-reaction-picker {
  text-align: center;
}

.rc-reaction-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  margin-bottom: 6px;
  transition: var(--transition-fast);
}

.rc-reaction-btn:active {
  border-color: var(--color-teal);
  background: rgba(35, 199, 175, 0.08);
}

.rc-reaction-emoji {
  font-size: 20px;
}

/* ── Character counter (PHI 1000) ────────────────────── */
.rc-char-counter {
  position: fixed;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  z-index: 1003;
  box-shadow: var(--shadow-md);
  font-variant-numeric: tabular-nums;
  transition: background 0.3s ease;
}

.rc-cc-green { background: #16a34a; }
.rc-cc-orange { background: #d97706; }
.rc-cc-red { background: #dc2626; }

/* ── Toast notification ──────────────────────────────── */
.rc-toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  padding: 8px 18px;
  background: var(--color-navy);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  z-index: 9999;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
}

.rc-toast-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ═══════════════════════════════════════════════════════
   PHASE 10F · Assistive Layer
   ═══════════════════════════════════════════════════════ */

/* ── Settings gear button in top bar ────────────────── */
.rc-settings-btn {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.rc-settings-btn:active {
  background: var(--gray-200);
}

/* ── Assistive settings panel ───────────────────────── */
.rc-assist-panel {
  position: fixed;
  top: 48px;
  right: 0;
  width: 280px;
  max-width: 90vw;
  background: var(--bg-primary);
  border-left: var(--border-width) solid var(--border-color);
  border-bottom: var(--border-width) solid var(--border-color);
  border-radius: 0 0 0 var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1005;
  padding: 14px;
  animation: rcSlideRight 0.2s ease-out;
}

@keyframes rcSlideRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.rc-assist-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: var(--border-width) solid var(--border-color);
}

.rc-assist-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  gap: 8px;
}

.rc-assist-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.rc-assist-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.rc-assist-btn {
  padding: 6px 10px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  min-width: 32px;
  text-align: center;
}

.rc-assist-btn:active {
  background: var(--gray-100);
}

.rc-assist-btn.active {
  border-color: var(--color-teal);
  background: var(--color-teal);
  color: #fff;
}

.rc-assist-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 36px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Color swatches in assist panel */
.rc-color-swatch {
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.rc-color-swatch.active {
  box-shadow: 0 0 0 2px var(--color-teal);
}