/* ==========================================================================
   FocusFlow — ADHD Bionic Speed Reader Stylesheet
   ========================================================================== */

:root {
  --font-lexend: 'Lexend', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-atkinson: 'Atkinson Hyperlegible', sans-serif;
  --font-inter: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Merriweather', Georgia, serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Sizing and Dynamic Vars */
  --reader-font-size: 19px;
  --reader-line-height: 1.8;
  --reader-max-width: 70ch;
  --tail-opacity: 0.9;
  --bold-weight: 750;

  /* Default Light Paper Palette */
  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --text-main: #1e293b;
  --text-bold: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  --accent-color: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-text: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --ruler-bg: rgba(59, 130, 246, 0.12);
  --ruler-border: rgba(59, 130, 246, 0.35);
  --orp-color: #ef4444;
}

/* Warm Sepia Palette */
body.theme-sepia {
  --bg-app: #f4ecd8;
  --bg-card: #fdfaf2;
  --bg-card-subtle: #ede2c8;
  --text-main: #382e23;
  --text-bold: #1d160f;
  --text-muted: #786650;
  --border-color: #dfd1b3;
  --border-focus: #b45309;
  --accent-color: #b45309;
  --accent-hover: #92400e;
  --accent-light: #fef3c7;
  --accent-text: #ffffff;
  --ruler-bg: rgba(180, 83, 9, 0.12);
  --ruler-border: rgba(180, 83, 9, 0.35);
  --orp-color: #dc2626;
}

/* Calming Sage Matcha Palette */
body.theme-matcha {
  --bg-app: #eef3eb;
  --bg-card: #f9fbf8;
  --bg-card-subtle: #e2ebd9;
  --text-main: #273620;
  --text-bold: #162211;
  --text-muted: #5e7054;
  --border-color: #d1dfc7;
  --border-focus: #4d7c0f;
  --accent-color: #4d7c0f;
  --accent-hover: #3f6212;
  --accent-light: #ecfccb;
  --accent-text: #ffffff;
  --ruler-bg: rgba(77, 124, 15, 0.12);
  --ruler-border: rgba(77, 124, 15, 0.35);
  --orp-color: #b91c1c;
}

/* Midnight Dark Slate Palette */
body.theme-dark {
  --bg-app: #0b1120;
  --bg-card: #131c31;
  --bg-card-subtle: #1e293b;
  --text-main: #cbd5e1;
  --text-bold: #ffffff;
  --text-muted: #94a3b8;
  --border-color: #27354f;
  --border-focus: #60a5fa;
  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-light: #1e3a8a;
  --accent-text: #ffffff;
  --ruler-bg: rgba(96, 165, 250, 0.15);
  --ruler-border: rgba(96, 165, 250, 0.4);
  --orp-color: #f87171;
}

/* High Contrast Cyber OLED Palette */
body.theme-cyber {
  --bg-app: #050505;
  --bg-card: #101014;
  --bg-card-subtle: #1a1a22;
  --text-main: #d1d5db;
  --text-bold: #f59e0b; /* Amber bold fixation points */
  --text-muted: #8b949e;
  --border-color: #2a2a35;
  --border-focus: #06b6d4;
  --accent-color: #f59e0b;
  --accent-hover: #d97706;
  --accent-light: #451a03;
  --accent-text: #050505;
  --ruler-bg: rgba(245, 158, 11, 0.16);
  --ruler-border: rgba(245, 158, 11, 0.5);
  --orp-color: #fbbf24;
}

/* Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  min-height: 100vh;
  background-color: var(--bg-app);
  color: var(--text-main);
  transition: background-color 0.25s ease, color 0.25s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.font-lexend { font-family: var(--font-lexend); }
body.font-atkinson { font-family: var(--font-atkinson); }
body.font-inter { font-family: var(--font-inter); }
body.font-serif { font-family: var(--font-serif); }
body.font-mono { font-family: var(--font-mono); }

/* App Layout */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1700px;
  margin: 0 auto;
  padding: 16px 24px;
  gap: 16px;
}

/* Header */
.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

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

.brand-logo {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-bold);
  display: flex;
  align-items: center;
}

.logo-bold {
  color: var(--accent-color);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.logo-accent {
  color: var(--accent-color);
}

.tagline {
  font-size: 0.84rem;
  color: var(--text-muted);
}

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

/* Badges & Pills */
.badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 6px;
}

.badge-accent {
  background: var(--accent-light);
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
}

/* Segmented Control (View Modes) */
.segmented-control {
  display: inline-flex;
  background: var(--bg-card-subtle);
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}

.seg-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.seg-btn:hover {
  color: var(--text-bold);
}

.seg-btn.active {
  background: var(--bg-card);
  color: var(--accent-color);
  box-shadow: var(--shadow-sm);
}

/* Theme Dots */
.theme-picker {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 9px;
  background: var(--bg-card-subtle);
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.theme-dot {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.theme-dot:hover {
  transform: scale(1.15);
}

.theme-dot.active {
  border-color: var(--accent-color);
  transform: scale(1.15);
}

.theme-light-dot { background: #3b82f6; }
.theme-sepia-dot { background: #b45309; }
.theme-matcha-dot { background: #4d7c0f; }
.theme-dark-dot { background: #1e293b; }
.theme-cyber-dot { background: #f59e0b; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

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

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

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

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

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

.btn-ghost:hover {
  background: var(--bg-card-subtle);
  color: var(--text-bold);
}

.text-danger:hover {
  color: #ef4444 !important;
}

.icon-btn {
  padding: 8px;
}

/* Icons */
.icon {
  width: 18px;
  height: 18px;
}

.icon-sm {
  width: 16px;
  height: 16px;
}

.icon-xs {
  width: 14px;
  height: 14px;
}

/* Settings Drawer / Panel */
.settings-panel {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  transition: max-height 0.3s ease, opacity 0.3s ease;
}

.settings-panel.collapsed {
  display: none;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px 24px;
}

.setting-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.setting-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.setting-val {
  color: var(--accent-color);
  font-weight: 700;
}

/* Sliders & Forms */
.range-slider {
  width: 100%;
  accent-color: var(--accent-color);
  cursor: pointer;
  height: 6px;
  background: var(--bg-card-subtle);
  border-radius: 4px;
}

.slider-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.form-select, .select-micro {
  font-family: inherit;
  font-size: 0.84rem;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-main);
  outline: none;
  cursor: pointer;
  transition: border-color 0.15s ease;
}

.form-select:focus, .select-micro:focus {
  border-color: var(--border-focus);
}

.select-micro {
  padding: 4px 6px;
  font-size: 0.78rem;
}

/* Toggle Switch */
.toggle-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toggle-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
}

.toggle-switch input {
  display: none;
}

.switch-slider {
  width: 32px;
  height: 18px;
  background: var(--border-color);
  border-radius: 10px;
  position: relative;
  transition: background-color 0.2s ease;
}

.switch-slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 2px;
  top: 2px;
  background: #ffffff;
  border-radius: 50%;
  transition: transform 0.2s ease;
}

.toggle-switch input:checked + .switch-slider {
  background: var(--accent-color);
}

.toggle-switch input:checked + .switch-slider::before {
  transform: translateX(14px);
}

.switch-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-main);
}

/* Workspace */
.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  flex: 1;
  min-height: 580px;
}

/* Single focus mode layout */
.workspace.focus-mode {
  grid-template-columns: 1fr;
}

.workspace.focus-mode .input-pane {
  display: none;
}

.workspace.focus-mode .reader-pane {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.workspace.focus-mode .reader-scroll-area {
  display: flex;
  justify-content: center;
}

/* Panes */
.pane {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-bold);
}

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

.textarea-wrapper {
  flex: 1;
  display: flex;
  padding: 16px;
}

#rawInput {
  width: 100%;
  height: 100%;
  min-height: 440px;
  border: none;
  outline: none;
  resize: none;
  background: transparent;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.7;
  padding: 4px;
}

#rawInput::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.pane-footer {
  padding: 10px 18px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card-subtle);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.stats-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bullet {
  opacity: 0.5;
}

/* Reader Canvas */
.reader-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 24px 28px;
  position: relative;
}

.bionic-article {
  margin: 0 auto;
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
  color: var(--text-main);
  word-break: break-word;
  transition: font-size 0.15s ease, line-height 0.15s ease;
}

/* Width options */
.bionic-article.width-narrow { max-width: 55ch; }
.bionic-article.width-medium { max-width: 70ch; }
.bionic-article.width-wide { max-width: 85ch; }
.bionic-article.width-full { max-width: 100%; }

.bionic-article p {
  margin-bottom: 1.4em;
}

.bionic-article h1, .bionic-article h2, .bionic-article h3 {
  color: var(--text-bold);
  margin-top: 1.5em;
  margin-bottom: 0.8em;
  line-height: 1.3;
}

.bionic-article blockquote {
  border-left: 3px solid var(--accent-color);
  padding-left: 16px;
  margin: 1.4em 0;
  color: var(--text-muted);
  font-style: italic;
}

.bionic-article ul, .bionic-article ol {
  padding-left: 24px;
  margin-bottom: 1.4em;
}

.bionic-article li {
  margin-bottom: 0.4em;
}

/* Bionic Formatting */
.bionic-bold {
  font-weight: var(--bold-weight);
  color: var(--text-bold);
  letter-spacing: -0.01em;
}

.bionic-tail {
  font-weight: 400;
  color: var(--text-main);
  opacity: var(--tail-opacity);
}

/* Subtle word dimming toggle */
body.subtle-dimming .bionic-tail {
  opacity: 0.65;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 70px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 14px;
}

.empty-state h3 {
  font-size: 1.25rem;
  color: var(--text-bold);
  margin-bottom: 8px;
}

.empty-state p {
  max-width: 440px;
  margin: 0 auto;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Reading Ruler Guide */
.reading-ruler {
  position: fixed;
  left: 0;
  width: 100vw;
  height: 38px;
  background: var(--ruler-bg);
  border-top: 1.5px solid var(--ruler-border);
  border-bottom: 1.5px solid var(--ruler-border);
  pointer-events: none;
  z-index: 999;
  transform: translateY(-50%);
  transition: opacity 0.2s ease, top 0.05s ease;
  box-shadow: 0 0 16px rgba(0,0,0,0.06);
}

/* Audio Controls */
.audio-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 4px;
}

/* TTS Spoken Highlighting */
.tts-active-sentence {
  background: rgba(59, 130, 246, 0.15);
  border-radius: 4px;
  padding: 2px 4px;
  transition: background 0.15s ease;
}

.tts-active-word {
  background: var(--accent-color);
  color: var(--accent-text) !important;
  border-radius: 3px;
  padding: 0 2px;
}

/* RSVP Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}

.rsvp-card {
  width: 100%;
  max-width: 600px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px 30px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.rsvp-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-close {
  background: transparent;
  border: none;
  font-size: 1.7rem;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}

.btn-close:hover {
  color: var(--text-bold);
}

/* RSVP Display Box (ORP Fixation Target) */
.rsvp-display-box {
  position: relative;
  height: 140px;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.rsvp-crosshair-top, .rsvp-crosshair-bottom {
  position: absolute;
  left: 45%;
  width: 2px;
  height: 18px;
  background: var(--orp-color);
  transform: translateX(-50%);
}

.rsvp-crosshair-top { top: 0; }
.rsvp-crosshair-bottom { bottom: 0; }

.rsvp-word-container {
  font-size: 2.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  position: relative;
  user-select: none;
}

.rsvp-prefix {
  color: var(--text-muted);
  text-align: right;
  min-width: 140px;
}

.rsvp-center {
  color: var(--orp-color);
  font-weight: 800;
  padding: 0 1px;
}

.rsvp-suffix {
  color: var(--text-bold);
  text-align: left;
  min-width: 140px;
}

.rsvp-progress-wrapper {
  width: 100%;
  height: 6px;
  background: var(--bg-card-subtle);
  border-radius: 4px;
  overflow: hidden;
}

.rsvp-progress-bar {
  height: 100%;
  background: var(--accent-color);
  transition: width 0.1s linear;
}

.rsvp-stats-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.rsvp-controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.rsvp-btn-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.rsvp-play-btn {
  padding: 10px 24px;
  font-size: 1rem;
}

.rsvp-speed-control {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.speed-label {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.rsvp-keyboard-hint {
  text-align: center;
  font-size: 0.74rem;
  color: var(--text-muted);
}

kbd {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 2px 5px;
  font-family: inherit;
  font-size: 0.75rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--text-bold);
  color: var(--bg-card);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  animation: slideIn 0.25s ease forwards;
}

@keyframes slideIn {
  from { transform: translateY(16px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.hidden {
  display: none !important;
}

/* Responsive Behavior */
@media (max-width: 960px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  #rawInput {
    min-height: 240px;
  }
}

/* Print Stylesheet */
@media print {
  .app-header, .settings-panel, .input-pane, .pane-header, .pane-footer, .reading-ruler, .modal-backdrop, .toast {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .app-container, .workspace, .reader-pane, .reader-scroll-area {
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    box-shadow: none !important;
  }

  .bionic-article {
    max-width: 100% !important;
    font-size: 14pt !important;
    line-height: 1.7 !important;
  }

  .bionic-bold {
    font-weight: 800 !important;
    color: #000000 !important;
  }

  .bionic-tail {
    color: #333333 !important;
  }
}