/* ==========================================================================
   MaiTalk Design Tokens & Variables
   ========================================================================== */
:root {
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: 'Outfit', sans-serif;

  /* Color Palette - Premium Modern Dark Theme */
  --bg-app: #080B11;
  --bg-sidebar: rgba(10, 15, 26, 0.6);
  --bg-card: rgba(22, 30, 49, 0.4);
  --bg-card-back: rgba(13, 20, 35, 0.85);
  
  --border-glass: rgba(255, 255, 255, 0.07);
  --border-glass-focus: rgba(255, 255, 255, 0.15);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Saturated Soft Accents */
  --accent-blue: #00bcff;
  --accent-green: #10b981;
  --accent-orange: #f97316;
  --accent-danger: #ef4444;
  
  --accent-blue-glow: rgba(0, 188, 255, 0.2);
  --accent-green-glow: rgba(16, 185, 129, 0.2);
  --accent-orange-glow: rgba(249, 115, 22, 0.2);
  
  /* Shadow Systems */
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --shadow-inset: inset 0 1px 1px rgba(255, 255, 255, 0.1);
  --shadow-glow: 0 0 20px rgba(255, 255, 255, 0.03);
}

/* ==========================================================================
   Core Layout & Backdrop Setup
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Animated Aurora Background Layer */
.aurora-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.aurora-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.25;
  mix-blend-mode: screen;
  animation: aurora-drift 25s infinite alternate ease-in-out;
}

.orb-1 {
  background: var(--accent-blue);
  width: 500px;
  height: 500px;
  top: -100px;
  left: 10%;
  animation-duration: 20s;
}

.orb-2 {
  background: var(--accent-green);
  width: 600px;
  height: 600px;
  bottom: -150px;
  right: 15%;
  animation-duration: 28s;
  opacity: 0.18;
}

.orb-3 {
  background: var(--accent-orange);
  width: 450px;
  height: 450px;
  top: 40%;
  left: 55%;
  animation-duration: 24s;
  opacity: 0.12;
}

@keyframes aurora-drift {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(80px, -50px) scale(1.15);
  }
  100% {
    transform: translate(-40px, 60px) scale(0.9);
  }
}

/* App Core Architecture */
.app-window {
  display: flex;
  width: 100%;
  height: 100vh;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Sidebar Workspace Navigator
   ========================================================================== */
.sidebar {
  width: 80px;
  height: 100%;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-glass);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 0;
  justify-content: space-between;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-container .logo {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-blue), #4f46e5);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(0, 188, 255, 0.35);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  color: #fff;
  letter-spacing: -1px;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.nav-item {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  position: relative;
}

.nav-item:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-glass);
}

.nav-item.active {
  color: var(--accent-blue);
  background: rgba(0, 188, 255, 0.08);
  border-color: rgba(0, 188, 255, 0.2);
  box-shadow: 0 0 15px rgba(0, 188, 255, 0.1);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  left: -12px;
  top: 15px;
  width: 4px;
  height: 16px;
  border-radius: 0 4px 4px 0;
  background: var(--accent-blue);
}

/* ==========================================================================
   Main Workspace Frame & Header
   ========================================================================== */
.workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  padding: 0 32px 32px 32px;
}

.app-header {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: 24px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.traffic-lights {
  display: flex;
  gap: 8px;
}

.light {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  opacity: 0.75;
  transition: opacity 0.2s;
}

.light.close { background: #ff5f56; }
.light.minimize { background: #ffbd2e; }
.light.expand { background: #27c93f; }

.app-header:hover .light {
  opacity: 1;
}

.app-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.5px;
}

.badge-live {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
  padding: 2px 6px;
  border-radius: 20px;
  animation: pulse-border 2s infinite ease-in-out;
}

@keyframes pulse-border {
  0%, 100% { border-color: rgba(239, 68, 68, 0.3); }
  50% { border-color: rgba(239, 68, 68, 0.8); }
}

.header-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.workspace-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  padding: 6px 12px;
  border-radius: 30px;
  border: 1px solid var(--border-glass);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-indicator.online {
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
}

/* Redesigned Button Bases */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: #fff;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), #3b82f6);
  box-shadow: 0 4px 15px rgba(0, 188, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 188, 255, 0.4);
}

.btn-pill {
  padding: 6px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 11px;
}

.btn-pill.active {
  background: var(--accent-color, var(--accent-blue));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #f87171;
}

.btn-danger:hover {
  background: #ef4444;
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ==========================================================================
   Multi-Column Responsive Grid Board
   ========================================================================== */
.columns-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
  overflow: hidden;
}

/* 3D Perspective Card Layout */
.column-card {
  perspective: 1500px;
  height: 100%;
  min-height: 520px;
  position: relative;
  border-radius: 24px;
}

/* Locale-Specific Typefaces for "natural" reading and optimal legibility */
#col-ja, [data-lang="Japanese"] {
  font-family: 'M PLUS 1p', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
}
#col-ja *, [data-lang="Japanese"] * {
  font-family: 'M PLUS 1p', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
}

#col-zh, [data-lang="Chinese (Taiwan)"] {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
}
#col-zh *, [data-lang="Chinese (Taiwan)"] * {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
}

#col-en, [data-lang="English"] {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
}
#col-en *, [data-lang="English"] * {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
}


.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Toggle 3D Flip State */
.column-card.flipped .card-inner {
  transform: rotateY(180deg);
}

/* Common Card Panel Styling */
.card-front,
.card-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 24px;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.card-front:hover {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), var(--shadow-glow);
}

/* Card Header Structure */
.card-header {
  height: 68px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.02);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.lang-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.flag-avatar {
  font-size: 18px;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--border-glass-focus);
  box-shadow: none;
}

.lang-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.8px;
  color: var(--text-primary);
}

/* Accent Indicators */
#col-ja { --accent-color: var(--accent-blue); --accent-glow: var(--accent-blue-glow); }
#col-en { --accent-color: var(--accent-green); --accent-glow: var(--accent-green-glow); }
#col-zh { --accent-color: var(--accent-orange); --accent-glow: var(--accent-orange-glow); }

.column-card {
  border-top: 4px solid var(--accent-color);
}

/* ==========================================================================
   Header Micro-actions (Mute, Flip, Done)
   ========================================================================== */
.action-buttons {
  display: flex;
  gap: 8px;
}

.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--border-glass);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: var(--border-glass-focus);
}

#focus-mode-toggle {
  border: 1.5px solid rgba(255, 255, 255, 0.25) !important;
  color: var(--text-secondary) !important;
  background: rgba(255, 255, 255, 0.03) !important;
}

#focus-mode-toggle:hover {
  border-color: rgba(255, 255, 255, 0.75) !important;
  color: var(--text-primary) !important;
  background: rgba(255, 255, 255, 0.08) !important;
}

/* Bright Theme overrides for focus mode toggle */
body.theme-bright #focus-mode-toggle {
  border: 1.5px solid rgba(15, 23, 42, 0.25) !important;
  color: var(--text-secondary) !important;
  background: rgba(15, 23, 42, 0.03) !important;
}

body.theme-bright #focus-mode-toggle:hover {
  border-color: rgba(15, 23, 42, 0.75) !important;
  color: var(--text-primary) !important;
  background: rgba(15, 23, 42, 0.08) !important;
}


/* Mic Active States styling */
.col-mic-toggle.active {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.col-mic-toggle.active:hover {
  background: rgba(239, 68, 68, 0.25);
}

/* SVG state switches */
.col-mic-toggle .mic-on { display: none; }
.col-mic-toggle .mic-off { display: block; }

.col-mic-toggle.active .mic-on { display: block; }
.col-mic-toggle.active .mic-off { display: none; }

.active-flip {
  background: var(--accent-color);
  color: #fff;
  border-color: transparent;
}

.active-flip:hover {
  background: var(--accent-color);
  opacity: 0.9;
}

/* ==========================================================================
   Transcription Stream Container
   ========================================================================== */
.transcription-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Sleek Scrollbar Controls */
.transcription-body::-webkit-scrollbar,
.settings-body::-webkit-scrollbar {
  width: 6px;
}

.transcription-body::-webkit-scrollbar-track,
.settings-body::-webkit-scrollbar-track {
  background: transparent;
}

.transcription-body::-webkit-scrollbar-thumb,
.settings-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
}

.transcription-body::-webkit-scrollbar-thumb:hover,
.settings-body::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.18);
}

/* Speech Block UI Elements */
.speech-block {
  padding: 14px 16px;
  border-radius: 16px;
  position: relative;
  transition: all 0.3s;
  animation: message-slide-in 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes message-slide-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.speech-block.source {
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--accent-color);
}

.speech-block.translated {
  background: rgba(0, 0, 0, 0.12);
  border-left: 3px dashed var(--text-muted);
}

.block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.block-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent-color);
}

.speech-block.translated .block-tag {
  color: var(--text-secondary);
}

.timestamp {
  font-size: 10px;
  color: var(--text-muted);
}

.transcript-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-primary);
  transition: font-size 0.4s cubic-bezier(0.4, 0, 0.2, 1), line-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.transcript-text.text-secondary {
  color: var(--text-secondary);
}

/* Custom Plain mode styling triggers */
.column-card.plain-mode .speech-block {
  background: transparent !important;
  border-left: none !important;
  padding: 8px 0;
}
.column-card.plain-mode .card-front {
  background: #0f172a !important;
  border: 1px solid #1e293b !important;
}

/* Custom Text Hide layout triggers */
.column-card.hide-text .transcription-body {
  opacity: 0;
  visibility: hidden;
}

/* Custom Flip Column layout triggers */
.column-card.flip-layout .transcription-body {
  flex-direction: column-reverse;
}

/* ==========================================================================
   Microphone Waveform Pulse Visualizer (Bottom)
   ========================================================================== */
.mic-visualizer {
  height: 64px;
  border-top: 1px solid var(--border-glass);
  background: rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 14px;
  transition: all 0.3s;
}

.mic-visualizer:not(.active) {
  opacity: 0.6;
}

/* Responsive Bar wave visualization */
.wave-visual {
  display: flex;
  align-items: center;
  gap: 3px;
  height: 20px;
  width: 50px;
}

.wave-bar {
  display: block;
  width: 3px;
  height: 6px;
  border-radius: 4px;
  background: var(--text-muted);
  transition: all 0.3s;
}

/* Wave pulsating states when active */
.mic-visualizer.active .wave-bar {
  background: var(--accent-color);
  animation: audio-bounce 1s infinite alternate ease-in-out;
  box-shadow: 0 0 8px var(--accent-glow);
}

.mic-visualizer.active .wave-bar:nth-child(2) { animation-delay: 0.15s; }
.mic-visualizer.active .wave-bar:nth-child(3) { animation-delay: 0.3s; }
.mic-visualizer.active .wave-bar:nth-child(4) { animation-delay: 0.45s; }
.mic-visualizer.active .wave-bar:nth-child(5) { animation-delay: 0.1s; }
.mic-visualizer.active .wave-bar:nth-child(6) { animation-delay: 0.25s; }
.mic-visualizer.active .wave-bar:nth-child(7) { animation-delay: 0.35s; }
.mic-visualizer.active .wave-bar:nth-child(8) { animation-delay: 0.05s; }

@keyframes audio-bounce {
  0% { height: 4px; }
  100% { height: 18px; }
}

.mic-status-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.mic-visualizer.active .mic-status-label {
  color: var(--text-primary);
  font-weight: 600;
}

/* ==========================================================================
   Advanced Settings Panel (Card Back)
   ========================================================================== */
.card-back {
  transform: rotateY(180deg);
  background: var(--bg-card-back);
}

.back-header {
  border-bottom-color: rgba(255,255,255,0.04);
}

.back-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
  color: var(--text-primary);
}

.settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.settings-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.settings-section:last-of-type {
  border-bottom: none;
}

.section-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Beautiful customized form layouts */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Glassmorphic Dropdowns select styling */
.custom-select {
  font-family: var(--font-sans);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 13px;
  outline: none;
  cursor: pointer;
  transition: all 0.3s;
}

.custom-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* High Fidelity Interactive Range Sliders */
.slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
}

.slider-value {
  font-weight: 700;
  color: var(--accent-color);
  background: var(--accent-glow);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 11px;
}

.custom-range {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  outline: none;
  margin: 6px 0;
}

/* Range Thumb custom style webkit */
.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-glow);
  transition: transform 0.15s, background-color 0.15s;
}

.custom-range::-webkit-slider-thumb:hover {
  transform: scale(1.25);
  background: #fff;
}

/* Neumorphic Rounded Toggle Switches */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toggle-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toggle-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
}

.toggle-desc {
  font-size: 11px;
  color: var(--text-muted);
}

/* Switch markup controls */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider-switch {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  transition: .3s;
  border-radius: 34px;
}

.slider-switch:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: #fff;
  transition: .3s;
  border-radius: 50%;
}

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

input:checked + .slider-switch:before {
  transform: translateX(20px);
}

/* Danger zone box */
.danger-zone {
  margin-top: 10px;
  background: rgba(239, 68, 68, 0.04);
  border: 1px solid rgba(239, 68, 68, 0.15) !important;
  border-radius: 16px;
  padding: 16px;
}

/* ==========================================================================
   Multi-Theme Styling Adjustments (Bright & Black Modes)
   ========================================================================== */

/* 1. BRIGHT (LIGHT) THEME */
body.theme-bright {
  --bg-app: #f8fafc;
  --bg-sidebar: rgba(241, 245, 249, 0.85);
  --bg-card: rgba(255, 255, 255, 0.65);
  --bg-card-back: rgba(255, 255, 255, 0.95);
  
  --border-glass: rgba(15, 23, 42, 0.08);
  --border-glass-focus: rgba(15, 23, 42, 0.16);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --shadow-lg: 0 20px 40px -15px rgba(15, 23, 42, 0.08);
}

body.theme-bright .aurora-orb {
  opacity: 0.18;
}

body.theme-bright .nav-item:hover {
  background: rgba(15, 23, 42, 0.04);
}

body.theme-bright .nav-item.active {
  background: rgba(0, 188, 255, 0.06);
}

body.theme-bright .icon-btn {
  background: rgba(15, 23, 42, 0.03);
}

body.theme-bright .icon-btn:hover {
  background: rgba(15, 23, 42, 0.06);
}

body.theme-bright .speech-block.source {
  background: rgba(15, 23, 42, 0.03);
}

body.theme-bright .speech-block.translated {
  background: rgba(15, 23, 42, 0.06);
}

body.theme-bright .mic-visualizer {
  background: rgba(15, 23, 42, 0.03);
}

body.theme-bright .custom-select,
body.theme-bright .custom-range,
body.theme-bright .slider-switch {
  background: rgba(15, 23, 42, 0.04);
}

body.theme-bright .custom-select option {
  background: #ffffff;
  color: #0f172a;
}

body.theme-bright .custom-range::-webkit-slider-thumb:hover {
  background: #0f172a;
}

body.theme-bright .card-back {
  background: #ffffff;
}

/* 2. BLACK (PROJECTOR / LOW EMISSION) THEME */
body.theme-black {
  --bg-app: #000000;
  --bg-sidebar: #000000;
  --bg-card: #000000;
  --bg-card-back: #000000;
  
  --border-glass: #ffffff;
  --border-glass-focus: #ffffff;
  
  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;
  
  --shadow-lg: none;
  --shadow-inset: none;
  --shadow-glow: none;
}

/* Hide all background glowing visual auroras to prevent projector light leakage */
body.theme-black .aurora-container {
  display: none !important;
}

/* Disable all backdrop-blurs, drop-shadows, and glowing filters */
body.theme-black * {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  box-shadow: none !important;
  text-shadow: none !important;
}

body.theme-black .logo-container .logo {
  background: #000000;
  border: 2px solid #ffffff;
  box-shadow: none;
}

body.theme-black .badge-live {
  background: transparent;
  border-color: #ffffff;
  color: #ffffff;
  animation: none;
}

body.theme-black .workspace-status {
  background: #000000;
  border: 1px solid #ffffff;
}

body.theme-black .status-indicator.online {
  background: #ffffff;
  box-shadow: none;
}

body.theme-black .nav-item.active {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}

body.theme-black .nav-item.active::after {
  background: #ffffff;
}

body.theme-black .btn-primary {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
  font-weight: 700;
}

body.theme-black .btn-primary:hover {
  background: #cccccc;
  transform: none;
}

body.theme-black .column-card {
  border-top: 2px solid var(--accent-color) !important;
}

body.theme-black .card-front,
body.theme-black .card-back {
  background: #000000;
  border: 1.5px solid var(--accent-color) !important;
}

body.theme-black .card-front:hover {
  border-color: var(--accent-color) !important;
}

body.theme-black .card-header {
  border-bottom: 1.5px solid var(--accent-color) !important;
  background: #000000;
}

body.theme-black .flag-avatar {
  border-color: var(--accent-color) !important;
}

body.theme-black .icon-btn {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
  color: var(--accent-color) !important;
}

body.theme-black .icon-btn:hover {
  background: var(--accent-color) !important;
  color: #000000 !important;
}

body.theme-black #focus-mode-toggle {
  border: 1.5px solid rgba(255, 255, 255, 0.4) !important;
  color: rgba(255, 255, 255, 0.8) !important;
  background: #000000 !important;
}

body.theme-black #focus-mode-toggle:hover {
  border-color: #ffffff !important;
  color: #ffffff !important;
  background: rgba(255, 255, 255, 0.15) !important;
}

body.theme-black .col-mic-toggle.active {
  background: var(--accent-color) !important;
  color: #000000 !important;
  border-color: var(--accent-color) !important;
}

body.theme-black .speech-block.source {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
}

body.theme-black .speech-block.translated {
  background: #000000;
  border: 1px dashed var(--accent-color) !important;
}

body.theme-black .mic-visualizer {
  background: #000000;
  border-top: 1.5px solid var(--accent-color) !important;
  opacity: 1 !important;
}

body.theme-black .wave-bar {
  background: var(--accent-color) !important;
  animation-duration: 0.6s !important;
  box-shadow: none !important;
}

body.theme-black .custom-select {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
  color: var(--accent-color) !important;
}

body.theme-black .custom-select:focus {
  border-color: var(--accent-color) !important;
  box-shadow: none;
}

body.theme-black .custom-select option {
  background: #000000;
  color: var(--accent-color) !important;
}

body.theme-black .btn-pill {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
  color: var(--accent-color) !important;
}

body.theme-black .btn-pill.active {
  background: var(--accent-color) !important;
  color: #000000 !important;
  border-color: transparent;
}

body.theme-black .custom-range {
  background: var(--accent-color) !important;
}

body.theme-black .custom-range::-webkit-slider-thumb {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
  box-shadow: none;
}

body.theme-black .slider-switch {
  background-color: #000000;
  border: 1px solid var(--accent-color) !important;
}

body.theme-black .slider-switch:before {
  background-color: var(--accent-color) !important;
}

body.theme-black input:checked + .slider-switch {
  background-color: var(--accent-color) !important;
}

body.theme-black input:checked + .slider-switch:before {
  background-color: #000000;
}

body.theme-black .danger-zone {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
}

body.theme-black .btn-danger {
  background: #000000;
  border: 1px solid var(--accent-color) !important;
  color: var(--accent-color) !important;
}

body.theme-black .btn-danger:hover {
  background: var(--accent-color) !important;
  color: #000000 !important;
  border-color: transparent;
}

/* ==========================================================================
   Presenter Focus Mode & Exit Button Styles
   ========================================================================== */

body.focus-mode .sidebar {
  width: 0 !important;
  min-width: 0 !important;
  opacity: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
  border-right: none !important;
}

body.focus-mode .app-header {
  height: 0 !important;
  min-height: 0 !important;
  opacity: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
  border-bottom: none !important;
}

body.focus-mode .card-header {
  height: 0 !important;
  min-height: 0 !important;
  opacity: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
  border-bottom: none !important;
}

body.focus-mode .mic-visualizer {
  height: 0 !important;
  min-height: 0 !important;
  opacity: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
  border-top: none !important;
}

body.focus-mode .workspace {
  padding: 16px !important;
}

body.focus-mode .columns-grid {
  height: calc(100vh - 32px) !important;
  gap: 0 !important;
}

body.focus-mode .transcript-text {
  font-size: 24px !important;
  line-height: 1.65 !important;
  font-weight: 700 !important; /* Increased English/global font weight by a notch to bold 700 */
}

/* Japanese M PLUS 1p Bold 700 configuration for natural, high-readability projected block letters */
body.focus-mode #col-ja .transcript-text,
body.focus-mode [data-lang="Japanese"] .transcript-text {
  font-weight: 700 !important;
}


body.focus-mode .block-header {
  display: none !important;
}

body.focus-mode .column-card {
  border-top: none !important;
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 20px !important;
}

body.focus-mode .column-card:not(:last-child) {
  border-right: 1px solid transparent !important;
  border-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.15), rgba(255, 255, 255, 0.02)) 1 !important;
  border-radius: 0 !important;
}

body.focus-mode .card-front,
body.focus-mode .card-back {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

body.focus-mode .transcription-body {
  padding: 16px 0 !important;
}

body.focus-mode .speech-block {
  border-radius: 12px !important;
  margin-bottom: 8px !important;
  width: 100% !important;
}

#exit-focus-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 30px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #ffffff;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

#exit-focus-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

#exit-focus-btn svg {
  stroke: currentColor;
}

body.focus-mode #exit-focus-btn {
  opacity: 1;
  pointer-events: auto;
}

/* Theme Black overrides for Floating Exit button */
body.theme-black #exit-focus-btn {
  background: #000000;
  border: 1.5px solid #ffffff;
  color: #ffffff;
  box-shadow: none;
}

body.theme-black #exit-focus-btn:hover {
  background: #ffffff;
  color: #000000;
  border-color: #ffffff;
}