:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  /* C64 Classic Blue Background */
  background: #3e31a2;
  color: #a8a8ff;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.app {
  /* C64 Dark Blue Container */
  background: #352879;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  padding: 20px 24px 24px;
  max-width: 1150px;
  width: 100%;
  /* C64 Light Blue Border */
  border: 2px solid #7b71d6;
}

h1 {
  font-size: 1.4rem;
  margin: 0 0 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  /* C64 Light Blue Text */
  color: #a8a8ff;
}

.subtitle {
  font-size: 0.85rem;
  /* C64 Medium Blue */
  color: #7b71d6;
  margin-bottom: 16px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-group label {
  color: #a8a8ff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
}

select,
input[type="range"] {
  /* C64 Dark Blue Input */
  background: #2a1f6f;
  color: #a8a8ff;
  border-radius: 4px;
  border: 1px solid #7b71d6;
  padding: 4px 10px;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

select {
  min-width: 160px;
}

select:hover {
  border-color: #a8a8ff;
}

input[type="range"] {
  padding: 0;
}

button {
  border: none;
  border-radius: 4px;
  padding: 8px 18px;
  font-size: 0.9rem;
  cursor: pointer;
  /* C64 Light Blue Button */
  background: #7b71d6;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
}

button.secondary {
  background: transparent;
  color: #a8a8ff;
  box-shadow: none;
  border: 1px solid #7b71d6;
}

button:active {
  transform: translateY(1px);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.7);
}

.bpm-value {
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.loop-duration {
  color: #888899;
  font-size: 0.8rem;
  margin-left: 4px;
  font-variant-numeric: tabular-nums;
}

.voices-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 16px;
}

.voice,
.drum-machine {
  border-radius: 6px;
  border: 2px solid #7b71d6;
  background: #2a1f6f;
  overflow: hidden;
}

.voice-header,
.drum-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: #1f1659;
  border-bottom: 2px solid #7b71d6;
  gap: 10px;
}

.voice-title,
.drum-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #a8a8ff;
  opacity: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}

.voice-preview-btn {
  padding: 3px 8px;
  font-size: 0.7rem;
  min-width: auto;
  background: #7b71d6;
  border: 1px solid #a8a8ff;
  color: #fff;
  margin-left: 4px;
}

.voice-preview-btn:hover {
  background: #a8a8ff;
  border-color: #fff;
}

.voice-index-tag,
.drum-index-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid #7b71d6;
  background: #1f1659;
  color: #a8a8ff;
}

.voice-header-right,
.drum-header-right {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.voice-controls,
.drum-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
}

.voice-controls label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #d4d4e0;
}

.voice-controls select {
  font-size: 0.8rem;
  padding: 3px 10px;
}

.adsr-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 4px 8px;
  background: #1f1659;
  border-radius: 4px;
  border: 1px solid #7b71d6;
}

.adsr-param {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.adsr-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #a8a8ff;
  font-weight: bold;
}

.adsr-slider {
  width: 50px;
  height: 4px;
}

.adsr-value {
  font-size: 0.65rem;
  color: #a8a8ff;
  font-family: 'Courier New', monospace;
}

.pwm-control {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  background: #1f1659;
  border-radius: 3px;
  border: 1px solid #7b71d6;
}

.pwm-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #a8a8ff;
  font-weight: bold;
}

.pwm-slider {
  width: 60px;
  height: 4px;
}

.pwm-value {
  font-size: 0.7rem;
  color: #a8a8ff;
  font-family: 'Courier New', monospace;
  min-width: 30px;
}

.arp-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: #1f1659;
  border-radius: 3px;
  border: 1px solid #7b71d6;
}

.arp-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #a8a8ff;
  font-weight: bold;
  cursor: pointer;
}

.arp-speed,
.arp-type {
  font-size: 0.7rem;
  padding: 2px 4px;
  background: #2a1f6f;
  border: 1px solid #7b71d6;
  color: #a8a8ff;
  border-radius: 2px;
}

.vib-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: #1f1659;
  border-radius: 3px;
  border: 1px solid #7b71d6;
}

.vib-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #a8a8ff;
  font-weight: bold;
  cursor: pointer;
}

.vib-slider {
  width: 40px;
  height: 3px;
}

.fenv-controls,
.venv-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: #1f1659;
  border-radius: 3px;
  border: 1px solid #7b71d6;
}

.fenv-label,
.venv-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #a8a8ff;
  font-weight: bold;
  cursor: pointer;
}

.fenv-slider,
.venv-slider {
  width: 40px;
  height: 3px;
}

.voice-filter-knobs {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
}

.knob-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.knob-label {
  text-transform: uppercase;
  letter-spacing: 0.09em;
  opacity: 1;
  color: #a8a8ff;
}

.knob {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.knob input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  padding: 0;
  border: 2px solid #7b71d6;
  background: #2a1f6f;
  cursor: pointer;
  transform: rotate(-90deg);
}

.knob input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #a8a8ff;
  box-shadow: 0 0 8px rgba(168, 168, 255, 0.9);
}

.knob input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #a8a8ff;
  box-shadow: 0 0 8px rgba(168, 168, 255, 0.9);
  border: none;
}

.knob-value {
  font-variant-numeric: tabular-nums;
  font-size: 0.7rem;
  opacity: 1;
  color: #a8a8ff;
}

.sequencer {
  margin-top: 0;
}

.seq-header,
.seq-row {
  display: grid;
  grid-template-columns: 80px repeat(16, 1fr);
}

.seq-header {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: #1f1659;
  color: #a8a8ff;
}

.seq-header div {
  padding: 4px 6px;
  border-bottom: 2px solid #7b71d6;
  display: flex;
  align-items: center;
  justify-content: center;
}

.seq-row-label {
  padding: 4px 6px;
  font-size: 0.78rem;
  border-bottom: 1px solid #7b71d6;
  border-right: 2px solid #7b71d6;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  color: #a8a8ff;
  background: #2a1f6f;
}

.seq-grid-cell {
  border-left: 1px solid #7b71d6;
  border-bottom: 1px solid #7b71d6;
  height: 26px;
  cursor: pointer;
  position: relative;
  transition: background 0.12s, box-shadow 0.12s, transform 0.04s;
  background: #1f1659;
}

.seq-grid-cell:nth-child(4n + 0) {
  box-shadow: inset 1px 0 0 rgba(123, 113, 214, 0.3);
}

.seq-grid-cell.active {
  background: #a8a8ff;
  box-shadow: inset 0 0 0 1px #7b71d6, 0 0 8px rgba(168, 168, 255, 0.8);
}

.seq-grid-cell.active.accent {
  background: #fff;
  box-shadow: inset 0 0 0 2px #a8a8ff, 0 0 12px rgba(255, 255, 255, 0.9);
}

.seq-grid-cell.active.slide::before {
  content: "→";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7rem;
  color: #3e31a2;
  font-weight: bold;
}

.seq-grid-cell.step-current {
  outline: 2px solid #a8a8ff;
  outline-offset: -2px;
}

.seq-grid-cell::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 3px;
  border: 1px solid transparent;
}

.seq-grid-cell.active::after {
  border-color: rgba(62, 49, 162, 0.45);
}

.seq-grid-cell[style*="grid-column"] {
  z-index: 10;
  border-radius: 3px;
}

.footer {
  margin-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: #7b71d6;
  flex-wrap: wrap;
  gap: 8px;
}

.status-led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #7b71d6;
  display: inline-block;
  margin-right: 6px;
  box-shadow: 0 0 0 1px rgba(168, 168, 255, 0.3);
}

.status-led.on {
  background: #a8a8ff;
  box-shadow: 0 0 8px #a8a8ff;
}

/* Song Arranger Styles */
#songContainer {
  margin-top: 20px;
}

.song-arranger {
  background: #2a1f6f;
  border-radius: 6px;
  border: 2px solid #7b71d6;
  padding: 12px;
  margin-bottom: 16px;
}

.song-arranger-header h2 {
  font-size: 0.95rem;
  margin: 0 0 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #a8a8ff;
}

.song-instructions {
  font-size: 0.75rem;
  color: #7b71d6;
  margin: 0 0 10px;
}

.pattern-length-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.pattern-length-selector label {
  font-size: 0.75rem;
  color: #a8a8ff;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pattern-length-selector select {
  font-size: 0.75rem;
  min-width: 100px;
}

.song-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 12px;
}

.pattern-library-section h3,
.song-slots-section h3 {
  font-size: 0.75rem;
  margin: 0 0 6px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a8a8ff;
}

.pattern-controls {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.pattern-controls button {
  flex: 1;
  font-size: 0.75rem;
  padding: 6px 10px;
}

button.small {
  padding: 6px 10px;
  font-size: 0.75rem;
}

.pattern-library {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 300px;
  overflow-y: auto;
  padding: 6px;
  background: #1f1659;
  border-radius: 4px;
  border: 1px solid #7b71d6;
}

.pattern-library-item {
  padding: 6px 8px;
  background: #2a1f6f;
  border: 1px solid #7b71d6;
  border-radius: 4px;
  cursor: grab;
  font-size: 0.75rem;
  transition: all 0.15s;
  color: #a8a8ff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pattern-library-item:hover {
  background: #3e31a2;
  border-color: #a8a8ff;
  transform: translateX(3px);
}

.pattern-library-item:active {
  cursor: grabbing;
}

.pattern-library-item.selected {
  background: #a8a8ff;
  border-color: #fff;
  color: #1f1659;
  box-shadow: 0 0 8px rgba(168, 168, 255, 0.5);
}

.pattern-rename-btn,
.pattern-preview-btn {
  padding: 2px 6px;
  font-size: 0.7rem;
  min-width: auto;
  background: #7b71d6;
  border: 1px solid #a8a8ff;
  color: #fff;
  flex-shrink: 0;
  transition: opacity 0.15s;
}

.pattern-preview-btn {
  opacity: 1;
}

.pattern-rename-btn {
  opacity: 0;
}

.pattern-library-item:hover .pattern-rename-btn {
  opacity: 1;
}

.pattern-rename-btn:hover,
.pattern-preview-btn:hover {
  background: #a8a8ff;
  border-color: #fff;
}

.song-slots {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 4px;
  padding: 6px;
  background: #1f1659;
  border-radius: 4px;
  border: 1px solid #7b71d6;
  max-width: 100%;
  overflow: hidden;
}

.song-slot {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #2a1f6f;
  border: 1px solid #7b71d6;
  border-radius: 4px;
  font-size: 0.6rem;
  color: #7b71d6;
  cursor: pointer;
  transition: all 0.15s;
  padding: 4px;
  text-align: center;
  word-break: break-word;
  min-width: 0;
  overflow: hidden;
  line-height: 1.1;
}

.song-slot:hover {
  background: #3e31a2;
  border-color: #a8a8ff;
}

.song-slot.filled {
  background: #7b71d6;
  border-color: #a8a8ff;
  color: #fff;
  font-weight: 500;
}

.song-slot.current {
  outline: 2px solid #a8a8ff;
  outline-offset: 2px;
  box-shadow: 0 0 12px rgba(168, 168, 255, 0.6);
}

.song-slot.drag-over {
  background: #a8a8ff;
  border-color: #fff;
  transform: scale(1.05);
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: #a8a8ff;
}

/* Modal Styles */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: #2a1f6f;
  border-radius: 6px;
  border: 2px solid #7b71d6;
  padding: 24px;
  min-width: 300px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.95);
}

.modal-content h3 {
  margin: 0 0 16px;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #a8a8ff;
}

.modal-content input[type="text"] {
  width: 100%;
  box-sizing: border-box;
  background: #1f1659;
  color: #a8a8ff;
  border-radius: 4px;
  border: 1px solid #7b71d6;
  padding: 10px 12px;
  font-size: 0.9rem;
  outline: none;
  margin-bottom: 16px;
  font-family: inherit;
}

.modal-content input[type="text"]:focus {
  border-color: #a8a8ff;
  box-shadow: 0 0 0 2px rgba(168, 168, 255, 0.3);
}

.modal-buttons {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.modal-buttons button {
  min-width: 80px;
}

/* Mixer Panel Styles */
.mixer-panel {
  background: #2a1f6f;
  border-radius: 6px;
  border: 2px solid #7b71d6;
  padding: 20px;
  margin-bottom: 16px;
}

.mixer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid #7b71d6;
}

.mixer-header h2 {
  font-size: 1.1rem;
  margin: 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #a8a8ff;
}

.mixer-channels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.mixer-channel {
  background: #1f1659;
  border: 1px solid #7b71d6;
  border-radius: 6px;
  padding: 16px;
  transition: all 0.2s ease;
}

.mixer-channel:hover {
  border-color: #a8a8ff;
  box-shadow: 0 4px 12px rgba(168, 168, 255, 0.3);
}

.mixer-channel.disabled {
  opacity: 0.4;
}

.mixer-channel[data-voice="0"] .voice-badge {
  background: #7b71d6;
}

.mixer-channel[data-voice="1"] .voice-badge {
  background: #7b71d6;
}

.mixer-channel[data-voice="2"] .voice-badge {
  background: #7b71d6;
}

.mixer-channel-header {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #7b71d6;
}

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

.mixer-channel-header h4 {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a8a8ff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.voice-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.mixer-toggle-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 600;
  color: #a8a8ff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  user-select: none;
}

.mixer-toggle {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.mixer-slider {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
  padding: 8px;
  background: #2a1f6f;
  border-radius: 4px;
  border: 1px solid #7b71d6;
}

.mixer-slider label {
  font-size: 0.7rem;
  color: #a8a8ff;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.mixer-slider input[type="range"] {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #1f1659;
  outline: none;
  border: 1px solid #7b71d6;
}

.mixer-slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #a8a8ff;
  cursor: pointer;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.mixer-slider input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #a8a8ff;
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.mixer-value {
  font-size: 0.75rem;
  color: #a8a8ff;
  text-align: right;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.mixer-effect-section {
  background: #2a1f6f;
  border: 1px solid #7b71d6;
  border-radius: 4px;
  padding: 10px;
  margin-bottom: 10px;
  transition: all 0.2s ease;
}

.mixer-effect-section:hover {
  background: #3e31a2;
  border-color: #a8a8ff;
}

.mixer-effect-section.disabled {
  opacity: 0.4;
}

.mixer-effect-label {
  font-size: 0.75rem;
  color: #a8a8ff;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  user-select: none;
}

.mixer-effect-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

@media (max-width: 900px) {
  .app {
    margin: 10px;
    padding: 14px;
  }
  .seq-row-label {
    font-size: 0.7rem;
  }
  .seq-grid-cell {
    height: 22px;
  }
  .seq-header div {
    font-size: 0.65rem;
  }
  .controls {
    gap: 8px 14px;
  }
  .voice-header,
  .drum-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .voice-header-right,
  .drum-header-right {
    justify-content: flex-start;
  }
  .song-layout {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .pattern-library {
    max-height: 150px;
  }
  .song-slots {
    grid-template-columns: repeat(4, 1fr);
  }
}