:root {
  --bg-primary: #080c14;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-input: #0d1527;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.25);
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  
  --gradient-lightning: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
  --gradient-card: linear-gradient(180deg, rgba(30, 41, 59, 0.4) 0%, rgba(15, 23, 42, 0.6) 100%);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(139, 92, 246, 0.08) 0%, transparent 45%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--bg-card-border);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo-badge {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--gradient-lightning);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  box-shadow: 0 0 24px var(--accent-cyan-glow);
  animation: pulse-glow 3s infinite alternate;
}

@keyframes pulse-glow {
  0% { transform: scale(1); filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.4)); }
  100% { transform: scale(1.02); filter: drop-shadow(0 0 16px rgba(139, 92, 246, 0.6)); }
}

.brand-text h1 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-text .tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  padding: 3px 8px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

.brand-text p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

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

.status-chip, .spec-chip {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--bg-card-border);
}

.status-chip {
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.spec-chip {
  color: var(--text-muted);
}

/* Main Grid */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 1024px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}

/* Card Common */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

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

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

.card-title .icon {
  font-size: 1.25rem;
}

.card-title h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.char-count {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

/* Presets */
.quick-presets {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.presets-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.preset-btn {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn:hover {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.4);
}

/* Textarea */
.textarea-wrapper textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--text-main);
  font-size: 0.98rem;
  font-family: inherit;
  line-height: 1.6;
  resize: vertical;
  min-height: 140px;
  outline: none;
  transition: var(--transition);
}

.textarea-wrapper textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px var(--accent-cyan-glow);
}

/* Controls Grid */
.controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px;
  background: rgba(13, 21, 39, 0.6);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

@media (max-width: 600px) {
  .controls-grid {
    grid-template-columns: 1fr;
  }
}

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

.control-group.full-width {
  grid-column: 1 / -1;
  padding-top: 6px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}

.voice-presets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 4px 0 8px 0;
}

.voice-preset-btn {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid var(--bg-card-border);
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 6px 11px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.voice-preset-btn:hover {
  background: rgba(139, 92, 246, 0.2);
  color: var(--text-main);
  border-color: rgba(139, 92, 246, 0.4);
}

.voice-preset-btn.active {
  background: var(--gradient-lightning);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 12px var(--accent-purple-glow);
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.control-val {
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--accent-cyan);
}

.control-group input[type="range"] {
  accent-color: var(--accent-cyan);
  cursor: pointer;
  height: 6px;
  background: #1e293b;
  border-radius: 999px;
}

.control-group input[type="number"],
.control-group select {
  background: var(--bg-input);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text-main);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.control-group input[type="number"]:focus,
.control-group select:focus {
  border-color: var(--accent-purple);
}

.subtle-btn {
  background: transparent;
  border: none;
  color: var(--accent-purple);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: var(--transition);
}

.subtle-btn:hover {
  background: rgba(139, 92, 246, 0.15);
}

/* Primary Action Button */
.action-row {
  display: flex;
}

.primary-btn {
  width: 100%;
  background: var(--gradient-lightning);
  border: none;
  border-radius: var(--radius-md);
  padding: 14px 24px;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  box-shadow: 0 4px 20px var(--accent-cyan-glow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(6, 182, 212, 0.4);
}

.primary-btn:active {
  transform: translateY(0);
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-shortcut {
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(0, 0, 0, 0.25);
  padding: 3px 8px;
  border-radius: 6px;
  margin-left: auto;
}

.btn-spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Right Column */
.results-column {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

@media (max-width: 600px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  backdrop-filter: blur(10px);
}

.metric-card.highlight {
  border-color: rgba(6, 182, 212, 0.3);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(15, 23, 42, 0.8));
}

.metric-icon {
  font-size: 1.4rem;
}

.metric-content {
  display: flex;
  flex-direction: column;
}

.metric-title {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.metric-val {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: 'JetBrains Mono', monospace;
}

.metric-card.highlight .metric-val {
  color: var(--accent-cyan);
}

/* Player Card */
.player-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(13, 21, 39, 0.95) 100%);
}

.download-btn {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 14px;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  text-decoration: none;
  transition: var(--transition);
}

.download-btn:not(.disabled):hover {
  background: var(--accent-cyan);
  color: #000;
}

.download-btn.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.player-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.custom-player {
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  border: 1px solid var(--bg-card-border);
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.play-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-lightning);
  border: none;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
}

.play-btn:hover:not(:disabled) {
  transform: scale(1.06);
}

.play-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.progress-container {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--gradient-lightning);
  border-radius: 999px;
  transition: width 0.05s linear;
}

.time-display {
  font-size: 0.82rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
  min-width: 95px;
  text-align: right;
}

/* Karaoke Word Section */
.karaoke-section {
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 14px;
  border: 1px solid var(--bg-card-border);
}

.section-label {
  font-size: 0.76rem;
  color: var(--text-dim);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.karaoke-words {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 48px;
  align-items: center;
}

.karaoke-word {
  font-size: 0.95rem;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.karaoke-word:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

.karaoke-word.active {
  background: var(--accent-cyan);
  color: #020617;
  font-weight: 700;
  box-shadow: 0 0 14px var(--accent-cyan);
  transform: scale(1.08);
}

.placeholder-text {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
}

/* Normalization Diff Box */
.normalization-box {
  background: rgba(13, 21, 39, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.norm-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-purple);
}

.norm-seed {
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-dim);
}

.norm-diff {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.norm-line {
  display: flex;
  gap: 8px;
  font-size: 0.82rem;
}

.norm-tag {
  color: var(--text-dim);
  font-weight: 600;
  min-width: 105px;
}

.norm-content {
  color: var(--text-main);
  word-break: break-all;
}

.norm-content.mono {
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent-cyan);
}

/* Terminal Log Console */
.terminal-card {
  flex: 1;
  background: #060911;
  border-color: rgba(255, 255, 255, 0.06);
}

.terminal-actions {
  display: flex;
  gap: 8px;
}

.terminal-body {
  height: 180px;
  overflow-y: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.log-line {
  display: flex;
  gap: 8px;
  line-height: 1.4;
}

.log-time {
  color: var(--text-dim);
}

.log-phase {
  font-weight: 700;
  min-width: 90px;
}

.phase-INPUT { color: var(--accent-cyan); }
.phase-DEVICE { color: var(--accent-purple); }
.phase-NORMALIZER { color: var(--accent-amber); }
.phase-ALPHABET { color: #38bdf8; }
.phase-INFERENCE { color: #f472b6; }
.phase-DECODER { color: #4ade80; }
.phase-SAVE { color: #94a3b8; }
.phase-COMPLETE { color: #10b981; font-weight: 800; }

.log-msg {
  color: #cbd5e1;
}

/* History Card */
.history-card {
  margin-top: 4px;
}

.history-count {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.history-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}

.empty-history {
  color: var(--text-dim);
  font-size: 0.85rem;
  font-style: italic;
  padding: 8px 0;
}

.history-item {
  background: rgba(13, 21, 39, 0.7);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: var(--transition);
}

.history-item:hover {
  border-color: rgba(6, 182, 212, 0.3);
  transform: translateY(-2px);
}

.history-text {
  font-size: 0.85rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.76rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.history-btn {
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: var(--text-main);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}

.history-btn:hover {
  background: var(--accent-cyan);
  color: #000;
}

/* Footer */
.app-footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-top: 12px;
}

.app-footer strong {
  color: var(--text-muted);
}