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

:root {
  --bg: #0d0d0d;
  --bg-secondary: #161616;
  --bg-tertiary: #1c1c1c;
  --border: #2a2a2a;
  --text: #e5e5e5;
  --text-muted: #737373;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --error: #ef4444;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px;
}

header {
  margin-bottom: 48px;
}

h1 {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 14px;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.help-icon {
  display: inline-block;
  width: 16px;
  height: 16px;
  line-height: 16px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 50%;
  cursor: help;
  margin-left: 4px;
  vertical-align: middle;
  transition: all 0.15s ease;
}

.help-icon:hover {
  color: var(--text);
  background: var(--border);
  border-color: #3a3a3a;
  transform: scale(1.1);
}

.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn:hover {
  background: var(--border);
  border-color: #3a3a3a;
}

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

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

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

.btn-record {
  background: var(--bg-tertiary);
}

.btn-record.recording {
  background: var(--error);
  border-color: var(--error);
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

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

.stat {
  background: var(--bg-tertiary);
  border-radius: 6px;
  padding: 12px;
}

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 18px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

canvas {
  width: 100%;
  height: 160px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.canvas-legend {
  display: flex;
  gap: 16px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

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

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-dot.original {
  background: var(--accent);
}

.legend-dot.decoded {
  background: var(--success);
}

.log {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 12px;
  line-height: 1.6;
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  color: var(--text-muted);
}

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

.log .success {
  color: var(--success);
}

.log .error {
  color: var(--error);
}

.hidden {
  display: none !important;
}

.metadata-content {
  font-size: 13px;
}

.metadata-content .meta-row {
  display: flex;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.metadata-content .meta-row:last-child {
  border-bottom: none;
}

.metadata-content .meta-label {
  color: var(--text-muted);
  width: 120px;
  flex-shrink: 0;
}

.metadata-content .meta-value {
  color: var(--text);
}

.metadata-content .cover-art {
  max-width: 120px;
  max-height: 120px;
  border-radius: 4px;
  margin-top: 8px;
}

.metadata-content .sections-list,
.metadata-content .lyrics-preview {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg);
  border-radius: 4px;
  padding: 8px;
  margin-top: 4px;
  max-height: 100px;
  overflow-y: auto;
}

.file-input {
  display: none;
}

.metadata-editor {
  margin-top: 0;
}

.metadata-editor.hidden {
  display: none;
}

.input-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (max-width: 500px) {
  .input-grid {
    grid-template-columns: 1fr;
  }
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.input-group label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.input-group input,
.input-group textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 10px;
  font-size: 13px;
  color: var(--text);
  font-family: inherit;
  transition: border-color 0.15s;
}

.input-group input:focus,
.input-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.input-group input::placeholder,
.input-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.input-group textarea {
  resize: vertical;
  min-height: 60px;
}

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 6px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.05);
}

.drop-zone p {
  color: var(--text-muted);
  font-size: 14px;
}

.drop-zone span {
  color: var(--accent);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

footer a {
  color: var(--text);
  text-decoration: none;
}

footer a:hover {
  color: var(--accent);
}

.icon {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.encoding-mode {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.mode-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.mode-btn:hover {
  border-color: #3a3a3a;
}

.mode-btn.active {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
}

.mode-btn .mode-name {
  font-size: 14px;
  font-weight: 500;
}

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

.quality-slider {
  margin-top: 12px;
}

.quality-slider label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.quality-slider input[type="range"] {
  width: 100%;
  height: 6px;
  background: var(--bg);
  border-radius: 3px;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.quality-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.quality-labels {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
}

.quality-value {
  text-align: center;
  font-size: 13px;
  color: var(--text);
  margin-top: 8px;
}

/* Streaming Demo */
.streaming-info {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.streaming-status {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 12px;
  font-weight: 500;
}

.status-idle {
  background: var(--bg-tertiary);
  color: var(--text-muted);
}

.status-connecting {
  background: rgba(59, 130, 246, 0.2);
  color: var(--accent);
}

.status-receiving {
  background: rgba(234, 179, 8, 0.2);
  color: #eab308;
}

.status-ready {
  background: rgba(34, 197, 94, 0.2);
  color: var(--success);
}

.status-playing {
  background: rgba(59, 130, 246, 0.3);
  color: var(--accent);
  animation: pulse 1.5s ease-in-out infinite;
}

.status-buffering {
  background: rgba(234, 179, 8, 0.2);
  color: #eab308;
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

.status-error {
  background: rgba(239, 68, 68, 0.2);
  color: var(--error);
}

.streaming-progress {
  font-size: 12px;
  color: var(--text-muted);
}

.badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  margin-left: 8px;
  vertical-align: middle;
}

/* Encoding Info */
.encoding-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.encoding-info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border-radius: 6px;
}

.encoding-info-item .meta-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.encoding-info-item .meta-value {
  font-size: 13px;
  color: var(--text);
  word-break: break-word;
}

.analysis-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.analysis-main {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.loudness-meter-container {
  width: 100%;
}

.loudness-meter-container canvas {
  width: 100%;
  height: 50px;
  border-radius: 4px;
}

.analysis-values {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

@media (max-width: 500px) {
  .analysis-values {
    grid-template-columns: repeat(2, 1fr);
  }
}

.analysis-value {
  background: var(--bg-tertiary);
  padding: 10px 12px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.analysis-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.analysis-number {
  font-size: 16px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.analysis-category {
  font-weight: 600;
}

.analysis-spectrum {
  background: var(--bg-tertiary);
  border-radius: 6px;
  padding: 12px;
}

.spectrum-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.analysis-spectrum canvas {
  width: 100%;
  height: 80px;
  border-radius: 4px;
}

/* Loudness level colors */
.loudness-very-loud {
  color: #ef4444;
}
.loudness-loud {
  color: #f97316;
}
.loudness-normal {
  color: #22c55e;
}
.loudness-quiet {
  color: #3b82f6;
}
.loudness-very-quiet {
  color: #6366f1;
}

/* ====== Player Styles ====== */

.live-visualizer-container {
  margin-bottom: 12px;
}

.live-visualizer-container canvas {
  width: 100%;
  height: 80px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
}

.seekbar-container {
  margin-bottom: 8px;
  cursor: pointer;
}

.seekbar-container canvas {
  width: 100%;
  height: 40px;
  border-radius: 4px;
  background: var(--bg-tertiary);
}

.seekbar-container:hover canvas {
  opacity: 0.9;
}

.time-display {
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  margin-bottom: 16px;
}

.player-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-large {
  padding: 12px 24px;
  font-size: 15px;
}

.btn-spacer {
  flex: 1;
  min-width: 8px;
}

@media (max-width: 500px) {
  .player-controls {
    justify-content: center;
  }

  .btn-spacer {
    display: none;
  }
}