/* Synth Studio - Dark IDE Aesthetic */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-panel: #1a1f26;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.3);
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --purple: #a371f7;
  --cyan: #79c0ff;
  --orange: #ffa657;
  --pink: #ff7b72;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Mono', 'Fira Code', Consolas, monospace;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow);
}

.header-controls {
  display: flex;
  gap: 0.5rem;
}

.btn {
  padding: 0.5rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s;
}

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

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

.btn-primary:hover {
  background: #79b8ff;
  border-color: #79b8ff;
}

select {
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.875rem;
}

/* Main Content Grid */
.main-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.top-row, .middle-row {
  display: grid;
  gap: 1rem;
}

.top-row {
  grid-template-columns: 1fr 1fr 1.5fr;
}

.middle-row {
  grid-template-columns: 1fr 1.5fr 1fr 0.75fr;
}

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.panel h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

/* Control Groups */
.control-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.control-group label {
  width: 60px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.control-group input[type="range"] {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  background: var(--bg-tertiary);
  border-radius: 3px;
  cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-glow);
}

.control-group .value {
  width: 60px;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: right;
  font-family: 'SF Mono', monospace;
}

/* Waveform Selector */
.waveform-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.wave-btn {
  flex: 1;
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all 0.2s;
}

.wave-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.wave-btn.active {
  background: var(--accent);
  color: var(--bg-primary);
  border-color: var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
}

/* Visualization */
.viz-container {
  position: relative;
  margin-bottom: 0.5rem;
}

.viz-container canvas {
  width: 100%;
  height: 80px;
  background: var(--bg-primary);
  border-radius: 4px;
  display: block;
}

#spectrum-canvas {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 0.3s;
}

.viz-toggle {
  display: flex;
  gap: 0.25rem;
}

.viz-btn {
  flex: 1;
  padding: 0.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  transition: all 0.2s;
}

.viz-btn.active {
  background: var(--border-color);
  color: var(--text-primary);
}

/* ADSR Envelope */
.adsr-visual {
  margin-bottom: 0.75rem;
}

.adsr-visual canvas {
  width: 100%;
  height: 60px;
  background: var(--bg-primary);
  border-radius: 4px;
}

.adsr-controls {
  display: flex;
  justify-content: space-around;
}

.adsr-knob {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.adsr-knob input[type="range"] {
  writing-mode: vertical-lr;
  direction: rtl;
  width: 6px;
  height: 60px;
  -webkit-appearance: none;
  background: var(--bg-tertiary);
  border-radius: 3px;
}

.adsr-knob input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--cyan);
  border-radius: 50%;
  cursor: pointer;
}

.adsr-knob label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--cyan);
}

.adsr-knob .value {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: 'SF Mono', monospace;
}

/* Effects Panel */
.effect-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.effect-row:last-child {
  border-bottom: none;
}

.effect-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 80px;
}

.effect-toggle input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

.effect-toggle label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.effect-controls {
  display: flex;
  gap: 1rem;
  flex: 1;
}

.mini-control {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mini-control input[type="range"] {
  width: 60px;
  height: 4px;
  -webkit-appearance: none;
  background: var(--bg-tertiary);
  border-radius: 2px;
}

.mini-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  background: var(--purple);
  border-radius: 50%;
  cursor: pointer;
}

.mini-control span {
  font-size: 0.6rem;
  color: var(--text-muted);
  text-align: center;
}

/* LFO */
.lfo-target {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.5rem;
}

.lfo-target-btn {
  flex: 1;
  padding: 0.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  transition: all 0.2s;
}

.lfo-target-btn.active {
  background: var(--orange);
  color: var(--bg-primary);
  border-color: var(--orange);
}

/* Master */
.level-meter {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.meter-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--success), var(--warning), var(--danger));
  transition: width 0.05s;
}

/* Keyboard Section */
.keyboard-section {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.keyboard-section h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.keyboard-hint {
  font-weight: normal;
  color: var(--text-muted);
  font-size: 0.65rem;
}

.keyboard {
  display: flex;
  position: relative;
  height: 140px;
  user-select: none;
}

.white-key {
  flex: 1;
  background: linear-gradient(180deg, #f0f0f0 0%, #d0d0d0 100%);
  border: 1px solid #999;
  border-radius: 0 0 6px 6px;
  cursor: pointer;
  position: relative;
  z-index: 1;
  transition: all 0.05s;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 8px;
}

.white-key:hover {
  background: linear-gradient(180deg, #fff 0%, #e0e0e0 100%);
}

.white-key.active {
  background: linear-gradient(180deg, var(--accent) 0%, #4a90d9 100%);
  transform: translateY(2px);
}

.white-key .note-label {
  font-size: 0.6rem;
  color: #666;
  font-weight: 500;
}

.white-key .key-hint {
  font-size: 0.55rem;
  color: #999;
  margin-top: 2px;
}

.black-key {
  width: 40px;
  height: 90px;
  background: linear-gradient(180deg, #333 0%, #111 100%);
  border: 1px solid #000;
  border-radius: 0 0 4px 4px;
  cursor: pointer;
  position: absolute;
  z-index: 2;
  transition: all 0.05s;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 6px;
}

.black-key:hover {
  background: linear-gradient(180deg, #444 0%, #222 100%);
}

.black-key.active {
  background: linear-gradient(180deg, var(--purple) 0%, #7c3aed 100%);
  transform: translateY(2px);
}

.black-key .key-hint {
  font-size: 0.5rem;
  color: #666;
}

/* Sequencer Section */
.sequencer-section {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
}

.sequencer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.sequencer-header h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-secondary);
}

.sequencer-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.bpm-control, .swing-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.bpm-control label, .swing-control label {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.bpm-control input {
  width: 60px;
  padding: 0.25rem 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 0.875rem;
  text-align: center;
}

.swing-control input {
  width: 60px;
  height: 4px;
  -webkit-appearance: none;
  background: var(--bg-tertiary);
  border-radius: 2px;
}

.swing-control input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.transport {
  display: flex;
  gap: 0.25rem;
}

.transport-btn {
  width: 36px;
  height: 36px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

#play-btn.playing {
  background: var(--success);
  color: var(--bg-primary);
  border-color: var(--success);
}

#record-btn.recording {
  background: var(--danger);
  color: white;
  border-color: var(--danger);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Sequencer Grid */
.sequencer-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.seq-track {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.track-label {
  width: 100px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.track-label span {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.track-label select {
  padding: 2px 4px;
  font-size: 0.65rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  color: var(--text-primary);
}

.track-steps {
  display: flex;
  gap: 2px;
  flex: 1;
}

.step {
  flex: 1;
  height: 28px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.1s;
}

.step:hover {
  border-color: var(--text-muted);
}

.step.active {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.step.current {
  border-color: var(--success);
  box-shadow: 0 0 5px rgba(63, 185, 80, 0.5);
}

/* Beat markers (every 4 steps) */
.step:nth-child(4n+1) {
  border-left: 2px solid var(--text-muted);
}

.drum-track .step.active {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 8px rgba(255, 166, 87, 0.4);
}

.step-indicator {
  display: flex;
  gap: 2px;
  margin-top: 4px;
  margin-left: 108px;
}

.step-indicator .dot {
  flex: 1;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
}

.step-indicator .dot.active {
  background: var(--success);
}

/* Footer */
.footer {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 1rem;
}

#recording-indicator {
  color: var(--danger);
  font-weight: 600;
  animation: pulse 1s infinite;
}

.hidden {
  display: none;
}

/* Responsive */
@media (max-width: 1200px) {
  .top-row {
    grid-template-columns: 1fr 1fr;
  }
  
  .visualization-panel {
    grid-column: span 2;
  }
  
  .middle-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .top-row, .middle-row {
    grid-template-columns: 1fr;
  }
  
  .visualization-panel {
    grid-column: span 1;
  }
  
  .keyboard {
    height: 100px;
  }
  
  .black-key {
    height: 60px;
    width: 30px;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}