/* ==========================================================================
   FlashRead RSVP Speed Reader - Stylesheet
   ========================================================================== */

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', 'SF Mono', Consolas, Menlo, monospace;
  --font-serif: 'Merriweather', Georgia, serif;

  --active-font: var(--font-sans);
  --word-font-size: 68px;
  --orp-color: #ff4757;
  --reticle-x: 42%;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-med: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==================== THEMES ==================== */
/* Theme: Dark Slate (Default) */
body.theme-dark {
  --bg-app: #0f141c;
  --bg-card: #171f2d;
  --bg-input: #121824;
  --bg-elevated: #1f293d;
  --border-color: #27344d;
  --border-subtle: #1c273a;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-primary: #3b82f6;
  --accent-primary-hover: #2563eb;
  --accent-text: #ffffff;
  
  --reticle-color: rgba(255, 255, 255, 0.25);
  --reticle-line: rgba(255, 255, 255, 0.08);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --timeline-bg: #27344d;
}

/* Theme: OLED Black */
body.theme-oled {
  --bg-app: #000000;
  --bg-card: #0a0a0a;
  --bg-input: #050505;
  --bg-elevated: #141414;
  --border-color: #222222;
  --border-subtle: #161616;
  
  --text-main: #ffffff;
  --text-muted: #a1a1aa;
  --text-dim: #52525b;
  
  --accent-primary: #e11d48;
  --accent-primary-hover: #be123c;
  --accent-text: #ffffff;
  
  --reticle-color: rgba(255, 255, 255, 0.3);
  --reticle-line: rgba(255, 255, 255, 0.08);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.9);
  --timeline-bg: #222222;
}

/* Theme: Warm Sepia */
body.theme-sepia {
  --bg-app: #f4ecd8;
  --bg-card: #eadeca;
  --bg-input: #fbf7ee;
  --bg-elevated: #ded0b9;
  --border-color: #d1c1a7;
  --border-subtle: #dfd1b9;
  
  --text-main: #382c1e;
  --text-muted: #6e5e4a;
  --text-dim: #998772;
  
  --accent-primary: #b45309;
  --accent-primary-hover: #92400e;
  --accent-text: #ffffff;
  
  --reticle-color: rgba(56, 44, 30, 0.35);
  --reticle-line: rgba(56, 44, 30, 0.12);
  --shadow-lg: 0 15px 35px rgba(90, 70, 50, 0.12);
  --timeline-bg: #d1c1a7;
}

/* Theme: Clean Paper (Light) */
body.theme-light {
  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --bg-elevated: #e2e8f0;
  --border-color: #cbd5e1;
  --border-subtle: #e2e8f0;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  
  --accent-primary: #2563eb;
  --accent-primary-hover: #1d4ed8;
  --accent-text: #ffffff;
  
  --reticle-color: rgba(15, 23, 42, 0.35);
  --reticle-line: rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.08);
  --timeline-bg: #cbd5e1;
}

/* Theme: Cyberpunk */
body.theme-cyber {
  --bg-app: #0b0717;
  --bg-card: #150f29;
  --bg-input: #0e0a1f;
  --bg-elevated: #241a45;
  --border-color: #3b2b6d;
  --border-subtle: #2b1f50;
  
  --text-main: #00ffcc;
  --text-muted: #bd93f9;
  --text-dim: #6272a4;
  
  --accent-primary: #ff007f;
  --accent-primary-hover: #e00070;
  --accent-text: #ffffff;
  
  --reticle-color: #00ffcc;
  --reticle-line: rgba(0, 255, 204, 0.2);
  --shadow-lg: 0 20px 50px rgba(255, 0, 127, 0.2);
  --timeline-bg: #3b2b6d;
}

/* Font Families */
body.font-sans { --active-font: var(--font-sans); }
body.font-mono { --active-font: var(--font-mono); }
body.font-serif { --active-font: var(--font-serif); }

/* ==================== GLOBAL RESET & LAYOUT ==================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  overflow: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition-med), color var(--transition-med);
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  position: relative;
}

/* ==================== HEADER ==================== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 10;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
  padding: 4px 8px;
  margin: -4px -8px;
  border-radius: 10px;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.logo-group:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.logo-group:active {
  transform: translateY(0);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-primary), #ec4899);
  color: #fff;
  border-radius: 9px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.logo-text {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.logo-badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 9999px;
  background-color: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ==================== BUTTONS & INTERACTIVE ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--accent-primary);
  color: var(--accent-text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

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

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text-main);
  background-color: var(--bg-elevated);
}

.btn-icon {
  padding: 8px;
  border-radius: 8px;
  color: var(--text-muted);
}

.btn-icon:hover {
  color: var(--text-main);
}

.btn-icon-text {
  padding: 7px 14px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: 6px;
}

.btn-xs {
  padding: 3px 8px;
  font-size: 0.75rem;
  border-radius: 4px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.btn-xs:hover {
  color: var(--text-main);
  border-color: var(--accent-primary);
}

.btn-lg {
  padding: 12px 28px;
  font-size: 1.05rem;
  border-radius: 10px;
}

.btn-control {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  position: relative;
}

.btn-control:hover {
  background-color: var(--border-color);
  border-color: var(--text-muted);
}

.btn-play {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  padding: 0;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
}

.btn-micro-badge {
  position: absolute;
  bottom: 3px;
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text-muted);
}

/* ==================== MAIN WORKSPACE ==================== */
.main-content {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
}

.view-panel {
  display: none;
  flex: 1;
  height: 100%;
  width: 100%;
}

.view-panel.active {
  display: flex;
  flex-direction: column;
}

/* ==================== VIEW 1: PASTE SECTION ==================== */
#pasteSection {
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}

.paste-card {
  width: 100%;
  max-width: 900px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.paste-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.card-title {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.card-subtitle {
  color: var(--text-muted);
  font-size: 0.88rem;
  max-width: 580px;
  line-height: 1.4;
}

.paste-quick-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Link / URL Extractor Bar */
.url-extractor-bar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.url-input-container {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 4px 6px 4px 12px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.url-input-container:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.url-input-prefix {
  display: flex;
  align-items: center;
  color: var(--text-dim);
  margin-right: 10px;
}

.url-input-field {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-main);
}

.url-input-field::placeholder {
  color: var(--text-dim);
}

.btn-clear-url {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  margin-right: 6px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.btn-clear-url:hover {
  color: var(--text-main);
}

.url-fetch-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.url-status-message {
  font-size: 0.82rem;
  padding: 8px 12px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  line-height: 1.4;
}

.url-status-text {
  flex: 1;
}

.url-status-dismiss {
  background: transparent;
  border: none;
  color: inherit;
  opacity: 0.75;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.url-status-dismiss:hover {
  opacity: 1;
}

.url-status-message.loading {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--accent-primary);
}

.url-status-message.success {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.url-status-message.error {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.mini-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* Auto-Detect URL Banner */
.url-detect-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background-color: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-main);
  animation: fadeIn 0.2s ease;
}

.detect-banner-content {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.detect-banner-content strong {
  color: var(--text-main);
  max-width: 380px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: bottom;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.textarea-container {
  position: relative;
  width: 100%;
  height: 260px;
}

.textarea-container textarea {
  width: 100%;
  height: 100%;
  padding: 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  user-select: text;
  transition: border-color var(--transition-fast);
}

.textarea-container textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.textarea-container textarea::placeholder {
  color: var(--text-dim);
}

.drag-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background-color: rgba(23, 31, 45, 0.92);
  border: 2px dashed var(--accent-primary);
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.drag-overlay.active {
  display: flex;
}

.drag-overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--accent-primary);
  font-weight: 600;
}

/* Sanitizer / Stats Bar */
.cleaning-status-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.stat-item strong {
  color: var(--text-main);
  font-weight: 700;
}

.stat-divider {
  width: 1px;
  height: 14px;
  background-color: var(--border-color);
}

.badge-filter {
  color: #10b981;
  background-color: rgba(16, 185, 129, 0.12);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

/* Cleaning Options Toggle Panel */
.cleaning-options-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px 16px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
}

.options-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-muted);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent-primary);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.checkbox-label:hover {
  color: var(--text-main);
}

.paste-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
}

.wpm-quick-setup {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.input-with-unit {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 4px 10px;
}

.input-with-unit input {
  width: 60px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
}

.input-with-unit span {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 600;
}

/* ==================== VIEW 2: RSVP SPEED READER ==================== */
#readerSection {
  align-items: center;
  justify-content: center;
  padding: 30px;
  height: 100%;
}

.reader-viewport {
  width: 100%;
  max-width: 960px;
  height: 100%;
  max-height: 720px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* HUD Top Header */
.reader-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.hud-progress-text {
  color: var(--text-main);
  font-weight: 600;
}

.hud-percentage {
  color: var(--text-dim);
  margin-left: 6px;
  font-size: 0.85rem;
}

.speed-badge {
  display: flex;
  align-items: baseline;
  gap: 4px;
  background-color: var(--bg-card);
  padding: 4px 12px;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
}

.speed-value {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.speed-unit {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
}

.hud-time-text {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
}

/* ==================== RSVP STAGE (CENTER PIECE) ==================== */
.rsvp-stage-wrapper {
  position: relative;
  width: 100%;
  height: 240px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
}

/* Reticle / Fixation Notch Marks */
.rsvp-reticle-guides {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

/* Top and bottom guide notches aligned at --reticle-x */
.reticle-notch {
  position: absolute;
  left: var(--reticle-x, 42%);
  width: 3px;
  height: 20px;
  background-color: var(--reticle-color);
  border-radius: 2px;
  transform: translateX(-50%);
}

.reticle-top {
  top: 18px;
}

.reticle-bottom {
  bottom: 18px;
}

/* Subtle top and bottom horizontal rails to frame the reading field cleanly */
.reticle-rail-top {
  position: absolute;
  top: 38px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--reticle-line) 15%, var(--reticle-line) 85%, transparent);
}

.reticle-rail-bottom {
  position: absolute;
  bottom: 38px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--reticle-line) 15%, var(--reticle-line) 85%, transparent);
}

.rsvp-stage-wrapper.hide-reticle .rsvp-reticle-guides {
  display: none;
}

/* Word Stage Anchor: Left edge locked directly to the reticle line */
.rsvp-stage {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--reticle-x, 42%);
  display: flex;
  align-items: center;
  z-index: 2;
  pointer-events: none;
}

.rsvp-word-anchor {
  display: inline-flex;
  align-items: baseline;
  white-space: nowrap;
  font-family: var(--active-font);
  font-size: var(--word-font-size);
  font-weight: 700;
  line-height: 1;
  letter-spacing: normal;
  user-select: none;
  will-change: transform;
  transform-origin: 0 50%;
}

.rsvp-part {
  display: inline;
  margin: 0;
  padding: 0;
}

.rsvp-left {
  color: var(--text-main);
  white-space: pre;
}

.rsvp-orp {
  color: var(--orp-color);
  font-weight: 800;
  text-shadow: 0 0 24px rgba(255, 71, 87, 0.4);
  white-space: pre;
}

.rsvp-right {
  color: var(--text-main);
  white-space: pre;
}

.pause-indicator {
  position: absolute;
  bottom: 14px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-primary);
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}

.pause-indicator.visible {
  opacity: 1;
}

/* ==================== SCRUBBER / TIMELINE ==================== */
.scrubber-bar-container {
  padding: 12px 0;
  cursor: pointer;
}

.timeline-bar {
  position: relative;
  height: 8px;
  background-color: var(--timeline-bg);
  border-radius: 9999px;
  transition: height var(--transition-fast);
}

.scrubber-bar-container:hover .timeline-bar {
  height: 12px;
}

.timeline-fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  background: linear-gradient(90deg, var(--accent-primary), #6366f1);
  border-radius: 9999px;
  pointer-events: none;
}

.timeline-handle {
  position: absolute;
  top: 50%;
  width: 18px;
  height: 18px;
  background-color: #ffffff;
  border: 3px solid var(--accent-primary);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  transition: transform var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.scrubber-bar-container:hover .timeline-handle {
  transform: translate(-50%, -50%) scale(1);
}

/* ==================== READER CONTROLS ==================== */
.reader-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 18px 24px;
  box-shadow: var(--shadow-lg);
}

.playback-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.speed-control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.speed-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.88rem;
}

.speed-label {
  color: var(--text-muted);
  font-weight: 600;
}

.speed-input-container {
  display: flex;
  align-items: center;
  gap: 4px;
}

.wpm-number-input {
  width: 75px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px 8px;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  outline: none;
}

.wpm-number-input:focus {
  border-color: var(--accent-primary);
}

.wpm-suffix {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
}

.speed-steppers {
  display: flex;
  gap: 6px;
}

.slider-wrapper {
  position: relative;
  padding: 4px 0;
}

.custom-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background-color: var(--bg-elevated);
  outline: none;
  cursor: pointer;
}

.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  border: 2px solid #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.custom-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.slider-ticks {
  position: relative;
  width: 100%;
  height: 24px;
  margin-top: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
}

.tick-label {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: color var(--transition-fast);
}

.tick-pip {
  width: 1px;
  height: 4px;
  background-color: var(--border-color);
  border-radius: 1px;
  transition: background-color var(--transition-fast), height var(--transition-fast);
}

.tick-label:first-child {
  transform: translateX(0);
}

.tick-label:first-child .tick-pip {
  align-self: flex-start;
  margin-left: 10px;
}

.tick-label:last-child {
  transform: translateX(-100%);
}

.tick-label:last-child .tick-pip {
  align-self: flex-end;
  margin-right: 10px;
}

.tick-label:hover {
  color: var(--text-main);
}

.tick-label:hover .tick-pip {
  background-color: var(--accent-primary);
  height: 6px;
}

.tick-label.active {
  color: var(--accent-primary);
  font-weight: 700;
}

.tick-label.active .tick-pip {
  background-color: var(--accent-primary);
  height: 6px;
}

@media (max-width: 480px) {
  .tick-label[data-wpm="350"] {
    display: none;
  }
}

.speed-presets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-pill {
  flex: 1;
  min-width: 70px;
  padding: 6px 8px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.preset-pill small {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-dim);
}

.preset-pill:hover {
  border-color: var(--border-color);
  color: var(--text-main);
}

.preset-pill.active {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
}

.preset-pill.active small {
  color: rgba(255, 255, 255, 0.8);
}

.keyboard-hints {
  display: flex;
  justify-content: center;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

kbd {
  display: inline-block;
  padding: 2px 5px;
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  line-height: 1;
  color: var(--text-muted);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
}

/* ==================== CONTEXT PEEK DRAWER ==================== */
.context-drawer {
  position: absolute;
  top: 0;
  right: 0;
  width: 440px;
  max-width: 90vw;
  height: 100%;
  background-color: var(--bg-card);
  border-left: 1px solid var(--border-color);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
  transform: translateX(100%);
  transition: transform var(--transition-med);
  z-index: 50;
  display: flex;
  flex-direction: column;
}

.context-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.drawer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
}

.drawer-subtext {
  font-size: 0.78rem;
  color: var(--text-dim);
  padding: 10px 24px 0 24px;
}

.drawer-content {
  flex: 1;
  padding: 16px 24px 30px;
  overflow-y: auto;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
  user-select: text;
}

.drawer-word {
  cursor: pointer;
  border-radius: 3px;
  padding: 1px 2px;
  transition: background-color 0.1s ease;
}

.drawer-word:hover {
  background-color: var(--bg-elevated);
  color: var(--text-main);
}

.drawer-word.current {
  background-color: var(--accent-primary);
  color: #ffffff !important;
  font-weight: 700;
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

/* ==================== SETTINGS MODAL ==================== */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.setting-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
}

.setting-header-with-value {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.setting-desc {
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.4;
}

.setting-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.theme-options, .font-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 8px;
}

.theme-btn, .font-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-btn:hover, .font-btn:hover {
  border-color: var(--text-muted);
}

.theme-btn.active, .font-btn.active {
  border-color: var(--accent-primary);
  background-color: var(--bg-elevated);
}

.theme-swatch {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.2);
}

.swatch-dark { background-color: #0f141c; }
.swatch-oled { background-color: #000000; }
.swatch-sepia { background-color: #f4ecd8; }
.swatch-light { background-color: #ffffff; }
.swatch-cyber { background-color: #ff007f; }

.orp-color-options {
  display: flex;
  gap: 12px;
}

.color-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--c);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.color-btn:hover {
  transform: scale(1.15);
}

.color-btn.active {
  border-color: #ffffff;
  box-shadow: 0 0 10px var(--c);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* ==================== RESPONSIVE ADJUSTMENTS ==================== */
@media (max-width: 768px) {
  .app-header {
    padding: 12px 16px;
  }

  #readerSection {
    padding: 16px;
  }

  .rsvp-stage-wrapper {
    height: 180px;
  }

  .rsvp-word-anchor {
    font-size: 44px;
  }

  .reticle-notch {
    height: 12px;
  }

  .reader-controls {
    padding: 14px;
  }

  .speed-presets {
    display: none;
  }

  .context-drawer {
    width: 100%;
  }

  .dual-side-stage-wrapper {
    height: 180px;
  }

  .dual-cell-anchor {
    font-size: clamp(22px, 3.2vw, 34px);
  }

  .dual-speed-settings {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ==================== HEADER MODE NAVIGATION ==================== */
.header-mode-nav {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  gap: 3px;
}

.mode-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.mode-tab:hover {
  color: var(--text-main);
}

.mode-tab.active {
  background-color: var(--bg-elevated);
  color: var(--text-main);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.mode-new-pill {
  font-size: 0.62rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ec4899, #8b5cf6);
  color: #ffffff;
  padding: 1px 5px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* ==================== DUAL-LANGUAGE VIEW ==================== */
#dualLangSection {
  align-items: center;
  justify-content: center;
  padding: 24px;
  height: 100%;
}

.dual-viewport {
  width: 100%;
  max-width: 960px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

.dual-top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.dual-pack-select-group, .dual-lang-target-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.custom-select {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 6px 10px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.custom-select:focus {
  border-color: var(--accent-primary);
}

.dual-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
}

.dual-hud-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dual-lang-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 700;
  transition: all 0.2s ease;
}

.dual-lang-badge.lang-en {
  background-color: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.dual-lang-badge.lang-target {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.dual-sentence-count {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.dual-audio-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
}

.dual-audio-toggle input[type="checkbox"] {
  accent-color: var(--accent-primary);
}

/* Dual Side-by-Side RSVP Stage */
.dual-side-stage-wrapper {
  position: relative;
  width: 100%;
  height: 220px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: stretch;
  overflow: hidden;
}

.dual-word-cell {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-card);
}

.dual-cell-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px 0;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 5;
}

.dual-cell-stage {
  flex: 1;
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Reticle guides in each cell */
.dual-cell-stage .reticle-notch {
  position: absolute;
  left: 42%;
  width: 2px;
  height: 16px;
  background-color: var(--reticle-color);
  border-radius: 1px;
  transform: translateX(-50%);
  pointer-events: none;
  z-index: 1;
}

.dual-cell-stage .reticle-top {
  top: 10px;
}

.dual-cell-stage .reticle-bottom {
  bottom: 10px;
}

.dual-cell-stage .reticle-rail-top {
  position: absolute;
  top: 26px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--reticle-line) 15%, var(--reticle-line) 85%, transparent);
}

.dual-cell-stage .reticle-rail-bottom {
  position: absolute;
  bottom: 26px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--reticle-line) 15%, var(--reticle-line) 85%, transparent);
}

.dual-cell-stage .rsvp-stage {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 42%;
  display: flex;
  align-items: center;
  z-index: 2;
  pointer-events: none;
}

.dual-cell-anchor {
  font-size: clamp(30px, 3.8vw, 48px);
}

.orp-blue {
  color: #38bdf8;
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
}

.orp-amber {
  color: #f59e0b;
  text-shadow: 0 0 20px rgba(245, 158, 11, 0.5);
}

/* Visual Synchronizer Divider */
.dual-stage-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  position: relative;
  z-index: 10;
}

.divider-line {
  flex: 1;
  width: 1px;
  background-color: var(--border-color);
}

.divider-badge {
  padding: 6px 4px;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent-primary);
  background-color: var(--bg-elevated);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

/* Dual Context Card */
.dual-context-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dual-sentence-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.dual-row-badge {
  font-size: 0.68rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  margin-top: 3px;
  flex-shrink: 0;
}

.dual-target-badge {
  background-color: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.dual-sentence-text {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.dual-sentence-divider {
  height: 1px;
  background-color: var(--border-subtle);
}

.dual-word-span {
  display: inline;
  padding: 1px 2px;
  border-radius: 4px;
  transition: all 0.12s ease;
  cursor: pointer;
}

.dual-word-span:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
}

.dual-word-span.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  font-weight: 700;
}

.dual-word-span.active-target {
  background-color: #f59e0b;
  color: #000000;
  font-weight: 700;
}

/* Dual Controls */
.dual-controls {
  padding: 14px 20px;
  gap: 12px;
}

.dual-speed-settings {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 8px 0;
  border-top: 1px solid var(--border-subtle);
}

.dual-speed-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dual-row-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  flex-shrink: 0;
  min-width: 90px;
}

.btn-row-play {
  padding: 3px 8px;
  font-size: 0.72rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all var(--transition-fast);
}

.btn-row-play.highlight-btn {
  background-color: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.4);
}

.btn-row-play.highlight-btn:hover {
  background-color: rgba(245, 158, 11, 0.25);
  border-color: #fbbf24;
}

/* Dual Mode Selector Pills */
.dual-mode-pills-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 4px;
}

.dual-mode-pills {
  display: flex;
  background-color: var(--bg-input);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  gap: 4px;
}

.dual-pill-btn {
  padding: 5px 12px;
  border: none;
  background: transparent;
  border-radius: 6px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dual-pill-btn:hover {
  color: var(--text-main);
}

.dual-pill-btn.active {
  background-color: var(--bg-elevated);
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.dual-pill-btn.active[data-mode="target"] {
  background-color: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
}

.dual-loop-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.dual-loop-toggle input[type="checkbox"] {
  accent-color: var(--accent-primary);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.dual-loop-toggle:hover {
  color: var(--text-main);
}