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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: #0a0a1a;
  color: #e0e0e0;
  overflow: hidden;
  height: 100vh;
  user-select: none;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Top bar */
.top-bar {
  display: flex;
  align-items: center;
  padding: 6px 16px;
  background: #141428;
  border-bottom: 1px solid #2a2a4a;
  gap: 10px;
  flex-shrink: 0;
  z-index: 10;
  flex-wrap: wrap;
}

.top-bar h1 {
  font-size: 17px;
  font-weight: 700;
  color: #7c9cff;
  margin-right: 8px;
  white-space: nowrap;
}

.top-logo {
  margin-right: 4px;
  border-radius: 4px;
}

.btn {
  padding: 5px 12px;
  border: 1px solid #3a3a5a;
  background: #1e1e3a;
  color: #c0c0e0;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn:hover {
  background: #2a2a4e;
  border-color: #5a5a8a;
}

.btn.active {
  background: #2a3a6a;
  border-color: #7c9cff;
  color: #fff;
}

.btn.primary {
  background: #2a4a8a;
  border-color: #4a7aff;
  color: #fff;
}

.btn.primary:hover {
  background: #3a5a9a;
}

.btn.success {
  background: #1a5a3a;
  border-color: #2a8a5a;
  color: #aaffcc;
}

.btn.danger {
  background: #5a1a1a;
  border-color: #aa3a3a;
  color: #ffaaaa;
}

#btn-sound.active {
  background: #1a5a3a;
  border-color: #2a8a5a;
  color: #aaffcc;
}

.btn:disabled {
  opacity: 0.4;
  cursor: default;
}

select {
  padding: 5px 8px;
  border: 1px solid #3a3a5a;
  background: #1e1e3a;
  color: #c0c0e0;
  border-radius: 5px;
  font-size: 12px;
  cursor: pointer;
}

select:focus {
  outline: 1px solid #7c9cff;
}

/* Controls row */
.controls-row {
  display: flex;
  align-items: center;
  padding: 5px 16px;
  background: #101024;
  border-bottom: 1px solid #222244;
  gap: 12px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.control-group label {
  font-size: 11px;
  color: #777;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.separator {
  width: 1px;
  height: 22px;
  background: #2a2a4a;
  flex-shrink: 0;
}

/* Main area */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  min-height: 0;
}

.canvas-container {
  flex: 1;
  position: relative;
  min-height: 0;
}

.canvas-container canvas {
  position: absolute;
  top: 0;
  left: 0;
}

/* Resizer */
.resizer {
  height: 12px;
  background: #1a1a3a;
  border-top: 1px solid #3a3a5a;
  border-bottom: 1px solid #3a3a5a;
  cursor: row-resize;
  flex-shrink: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 5;
  transition: background 0.15s;
}

.resizer:hover {
  background: #2a2a5a;
}

.resizer::before {
  content: '';
  width: 48px;
  height: 4px;
  background: #6a6aaa;
  border-radius: 2px;
}

.resizer.visible {
  display: flex;
}

/* Sheet music panel */
.sheet-panel {
  height: 260px;
  min-height: 120px;
  max-height: 60vh;
  background: #fefefe;
  position: relative;
  flex-shrink: 0;
  display: none;
  overflow: hidden;
}

.sheet-panel.visible {
  display: block;
}

.sheet-panel #sheet-canvas {
  width: 100%;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.sheet-scroll-hint {
  position: absolute;
  bottom: 4px;
  right: 8px;
  font-size: 10px;
  color: #bbb;
  pointer-events: none;
  opacity: 0.7;
}

/* Score overlay */
.score-overlay {
  position: absolute;
  top: 8px;
  right: 12px;
  background: rgba(10, 10, 26, 0.88);
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid #2a2a4a;
  z-index: 5;
  pointer-events: none;
  display: none;
}

.score-overlay.visible {
  display: block;
}

.score-value {
  font-size: 26px;
  font-weight: 700;
  color: #7c9cff;
}

.score-details {
  font-size: 11px;
  color: #888;
  margin-top: 2px;
}

.score-details span {
  margin-right: 8px;
}

.correct-count { color: #66BB6A; }
.missed-count { color: #FF7043; }
.wrong-count { color: #EF5350; }

/* Mic indicator */
.mic-indicator {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.mic-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #333;
  transition: background 0.2s;
}

.mic-dot.active {
  background: #4CAF50;
  box-shadow: 0 0 4px #4CAF50;
}

.mic-dot.error {
  background: #f44336;
}

/* Volume meter */
.volume-meter {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  height: 10px;
}

.volume-bar {
  width: 3px;
  height: 100%;
  background: #2a2a4a;
  border-radius: 1px;
  transition: background 0.1s;
}

.volume-bar.active {
  background: #4CAF50;
}

.volume-bar.high {
  background: #FF9800;
}

/* File input hidden */
#midi-file-input {
  display: none;
}

/* Range inputs */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: #2a2a4a;
  border-radius: 2px;
  outline: none;
  width: 80px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #7c9cff;
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #7c9cff;
  cursor: pointer;
  border: none;
}

/* Progress bar */
.progress-container {
  flex: 1;
  max-width: 250px;
  height: 5px;
  background: #1a1a2e;
  border-radius: 3px;
  cursor: pointer;
  position: relative;
  min-width: 80px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #5a7aff, #7c9cff);
  border-radius: 3px;
  transition: width 0.05s linear;
  pointer-events: none;
}

.speed-label {
  font-size: 11px;
  color: #888;
  min-width: 36px;
  text-align: right;
}

/* Welcome overlay */
.welcome-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 26, 0.92);
  z-index: 20;
  backdrop-filter: blur(4px);
}

.welcome-content {
  text-align: center;
  max-width: 480px;
  padding: 24px;
}

.welcome-content h2 {
  font-size: 28px;
  color: #7c9cff;
  margin-bottom: 12px;
  font-weight: 700;
}

.welcome-content p {
  color: #999;
  margin-bottom: 20px;
  line-height: 1.5;
  font-size: 14px;
}

.welcome-content .btn {
  font-size: 15px;
  padding: 10px 28px;
  margin: 0 6px;
}

.welcome-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 20px 0;
  text-align: left;
}

.welcome-feature {
  padding: 10px;
  background: rgba(30, 30, 60, 0.6);
  border-radius: 6px;
  border: 1px solid #2a2a4a;
}

.welcome-feature h4 {
  font-size: 13px;
  color: #9ab;
  margin-bottom: 4px;
}

.welcome-feature p {
  font-size: 11px;
  color: #667;
  margin-bottom: 0;
}

/* Song info */
.song-info {
  font-size: 12px;
  color: #aaa;
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Time display */
.time-display {
  font-size: 12px;
  color: #888;
  font-variant-numeric: tabular-nums;
  min-width: 90px;
  text-align: center;
}

/* Results overlay */
.results-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 26, 0.92);
  z-index: 20;
  backdrop-filter: blur(4px);
}

.results-overlay.visible {
  display: flex;
}

.results-content {
  text-align: center;
  max-width: 400px;
  padding: 32px;
  background: #141428;
  border-radius: 12px;
  border: 1px solid #2a2a4a;
}

.results-content h2 {
  font-size: 24px;
  color: #7c9cff;
  margin-bottom: 20px;
}

.results-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.result-stat {
  text-align: center;
}

.result-stat .value {
  font-size: 28px;
  font-weight: 700;
}

.result-stat .label {
  font-size: 11px;
  color: #666;
  text-transform: uppercase;
  margin-top: 4px;
}

.grade {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 8px;
}

.grade-s { color: #FFD700; }
.grade-a { color: #66BB6A; }
.grade-b { color: #42A5F5; }
.grade-c { color: #FF9800; }
.grade-d { color: #FF5722; }
.grade-f { color: #f44336; }

/* Responsive */
@media (max-width: 768px) {
  .top-bar {
    padding: 4px 8px;
    gap: 6px;
  }

  .controls-row {
    padding: 4px 8px;
    gap: 8px;
  }

.btn.active {
  background: #2a3a6a;
    padding: 4px 8px;
    font-size: 11px;
  }

  .welcome-features {
    grid-template-columns: 1fr;
  }

  .top-bar h1 {
    font-size: 14px;
  }
}

/* Calibration overlay */
.cal-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 26, 0.88);
  z-index: 25;
  backdrop-filter: blur(3px);
}
.cal-overlay.visible { display: flex; }
.cal-panel {
  text-align: center;
  padding: 28px 36px;
  background: #141428;
  border-radius: 12px;
  border: 1px solid #2a2a4a;
  min-width: 280px;
}
.cal-panel h3 { font-size: 18px; color: #7c9cff; margin-bottom: 4px; }
.cal-desc { font-size: 12px; color: #888; margin-bottom: 16px; }
.cal-note-display {
  font-size: 56px;
  font-weight: 800;
  color: #FFD700;
  margin: 12px 0;
  text-shadow: 0 0 20px rgba(255,215,0,0.3);
}
.cal-progress-track {
  width: 200px; height: 6px;
  background: #2a2a4a;
  border-radius: 3px;
  margin: 16px auto;
  overflow: hidden;
}
.cal-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #7c9cff, #FFD700);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}
.cal-status-msg { font-size: 14px; color: #aaa; min-height: 20px; margin-bottom: 12px; }
.cal-status-msg.success { color: #4CAF50; font-weight: 600; }
.cal-status-msg.done { color: #FFD700; font-weight: 700; font-size: 16px; }
.cal-panel .btn { font-size: 13px; padding: 6px 20px; }

/* Bottom bar */
.bottom-bar {
  display: flex;
  align-items: center;
  padding: 4px 10px;
  background: #141428;
  border-top: 1px solid #2a2a4a;
  flex-shrink: 0;
  z-index: 10;
  gap: 6px;
  min-height: 44px;
}

.bottom-left {
  display: flex;
  align-items: center;
  gap: 3px;
  flex: 0 0 200px;
}

.bar-label {
  font-size: 9px;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.bar-val {
  font-size: 10px;
  color: #999;
  min-width: 22px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.bottom-left input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: #3a3a5a;
  border-radius: 2px;
  outline: none;
  width: 44px;
  margin: 0;
}

.bottom-left input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #7c9cff;
  cursor: pointer;
}

.transport-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
}

.transport-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid #3a3a5a;
  background: #1e1e3a;
  color: #c0c0e0;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.15s;
  padding: 0;
}

.transport-btn:hover {
  background: #2a2a4e;
  border-color: #5a5a8a;
  color: #fff;
}

.transport-btn svg { fill: currentColor; }

.transport-btn.play-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #2a4a8a;
  border-color: #4a7aff;
  color: #fff;
}

.transport-btn.play-btn:hover { background: #3a5a9a; border-color: #6a9aff; }
.transport-btn.play-btn.active { background: #f44336; border-color: #ff6a6a; }

.bottom-right {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 1 auto;
  overflow: hidden;
  min-width: 0;
  max-width: 350px;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid #3a3a5a;
  background: #1e1e3a;
  color: #888;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  padding: 0;
  flex-shrink: 0;
}

.icon-btn:hover { background: #2a2a4e; border-color: #5a5a8a; color: #ccc; }
.icon-btn.active { background: #2a3a6a; border-color: #7c9cff; color: #fff; }

#status-text {
  font-size: 10px;
  color: #555;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

#detected-notes {
  font-size: 10px;
  color: #666;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.status-group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
}

.rec-status {
  font-size: 10px;
  color: #FF1744;
  font-weight: 600;
  min-width: 0;
}

.rec-playback {
  position: fixed;
  bottom: 54px;
  right: 12px;
  background: #1a1a3a;
  border: 1px solid #3a3a5a;
  border-radius: 8px;
  padding: 8px 12px;
  z-index: 50;
  min-width: 200px;
}

.rec-compare {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 8px;
}

.rec-compare-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.rec-compare-row label {
  font-size: 11px;
  color: #aaa;
  min-width: 60px;
  font-weight: 600;
}

.rec-compare-row audio {
  height: 40px;
  flex: 1;
  min-width: 200px;
  border-radius: 4px;
}

.rec-playback .btn { font-size: 11px; padding: 3px 10px; }