/* Monochrome color overrides for this application */
:root {
  --mono-black: #000000;
  --mono-darkest: #111111;
  --mono-darker: #222222;
  --mono-dark: #333333;
  --mono-medium-dark: #444444;
  --mono-medium: #666666;
  --mono-medium-light: #888888;
  --mono-light: #aaaaaa;
  --mono-lighter: #cccccc;
  --mono-lightest: #eeeeee;
  --mono-white: #ffffff;
  
  /* Override semantic colors with monochrome */
  --color-background: var(--mono-darkest);
  --color-surface: var(--mono-darker);
  --color-text: var(--mono-lightest);
  --color-text-secondary: var(--mono-light);
  --color-primary: var(--mono-white);
  --color-primary-hover: var(--mono-lightest);
  --color-border: var(--mono-dark);
  --color-card-border: var(--mono-medium-dark);
  
  /* Custom properties for this app */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-elevated: 0 4px 16px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--mono-darkest);
  color: var(--mono-lightest);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
}

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

/* Header */
.app-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
  border-bottom: 1px solid var(--mono-dark);
}

.app-header h1 {
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  color: var(--mono-white);
}

.subtitle {
  font-size: 1rem;
  color: var(--mono-medium-light);
  font-weight: 400;
}

/* Main content */
.main-content {
  flex: 1;
  padding: 2rem 1rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Waveform Monitor */
.waveform-monitor {
  background: linear-gradient(135deg, var(--mono-darker) 0%, var(--mono-darkest) 100%);
  border: 1px solid var(--mono-dark);
  border-radius: 16px;
  padding: 1.5rem;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  box-sizing: border-box;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.waveform-monitor::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.02) 0%, transparent 70%);
  pointer-events: none;
}

.waveform-monitor.visible {
  opacity: 1;
  visibility: visible;
}

#waveformCanvas {
  width: 100%;
  height: 120px;
  border-radius: 8px;
  background: transparent;
  display: block;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.1));
}

/* Control Bar */
.control-bar {
  background: var(--mono-darker);
  border: 1px solid var(--mono-dark);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.control-buttons {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.visual-controls {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin: 0 2rem;
}

.visual-control-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.visual-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--mono-white);
  letter-spacing: 0.5px;
  min-width: 80px;
}

.visual-toggle {
  background: var(--mono-medium-dark);
  border: 1px solid var(--mono-medium);
  color: var(--mono-white);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.visual-toggle:hover {
  background: var(--mono-medium);
  transform: translateY(-1px);
}

.visual-toggle.active {
  background: var(--mono-light);
  color: var(--mono-dark);
  box-shadow: 0 2px 8px rgba(255, 255, 255, 0.2);
}

.visual-toggle .button-text {
  font-size: 0.75rem;
  font-weight: 500;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
}

.toggle-input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-label {
  display: block;
  width: 50px;
  height: 24px;
  background: var(--mono-medium-dark);
  border: 1px solid var(--mono-medium);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
}

.toggle-label::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--mono-white);
  border-radius: 50%;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-input:checked + .toggle-label {
  background: var(--mono-light);
  border-color: var(--mono-white);
}

.toggle-input:checked + .toggle-label::before {
  transform: translateX(26px);
  background: var(--mono-dark);
}

/* Preset Controls */
.preset-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 2rem;
}

.preset-select {
  background: var(--mono-medium-dark);
  border: 1px solid var(--mono-medium);
  color: var(--mono-white);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  min-width: 120px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.preset-select:focus {
  outline: none;
  border-color: var(--mono-light);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.preset-select option {
  background: var(--mono-darker);
  color: var(--mono-white);
  font-weight: 600;
}

.control-sliders {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex: 1;
  justify-content: flex-end;
}

/* Frequency grid */
.frequency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

.frequency-card {
  background: var(--mono-darker);
  border: 1px solid var(--mono-dark);
  border-radius: 12px;
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  width: 100%;
  box-sizing: border-box;
}

.frequency-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
  pointer-events: none;
}

.frequency-card:hover::before {
  transform: translateX(100%);
}

.frequency-card:hover {
  border-color: var(--mono-medium);
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
}

.frequency-card.active {
  background: var(--mono-dark);
  box-shadow: var(--shadow-elevated);
}

/* Card header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  min-height: 60px;
}

.frequency-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--mono-white);
}

/* Frequency visual effects */
.frequency-visual {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  position: relative;
  z-index: 10;
  pointer-events: none;
}

.frequency-visual-inactive {
  opacity: 0.8;
  filter: grayscale(30%);
}

.frequency-visual-active {
  opacity: var(--visual-opacity, 1);
  transform: scale(var(--visual-scale, 1));
  animation: rotate var(--visual-rotation-speed, 6s) linear infinite;
  filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.3));
  z-index: 20;
}

.frequency-svg {
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}

@keyframes rotate {
  from { transform: rotate(0deg) scale(var(--visual-scale, 1)); }
  to { transform: rotate(360deg) scale(var(--visual-scale, 1)); }
}

.frequency-description {
  font-size: 0.875rem;
  color: var(--mono-light);
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

/* Card controls */
.card-controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.toggle-section, .volume-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toggle-section {
  align-items: center;
}

.volume-section {
  align-items: stretch;
}

.frequency-toggle {
  display: flex;
  justify-content: center;
  align-items: center;
}

.toggle-button {
  width: 40px;
  height: 20px;
  background: var(--mono-medium-dark);
  border-radius: 10px;
  position: relative;
  transition: var(--transition-smooth);
}

.frequency-card.active .toggle-button {
  background: var(--card-color, var(--mono-white));
}

.toggle-button::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--mono-white);
  border-radius: 50%;
  transition: var(--transition-smooth);
}

.frequency-card.active .toggle-button::after {
  transform: translateX(20px);
}

.toggle-label, .volume-label {
  font-size: 0.75rem;
  color: var(--mono-medium-light);
  text-align: center;
  font-weight: 500;
}

/* Volume slider */
.volume-slider-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.5rem;
  border-radius: 6px;
}

.frequency-volume-slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--mono-dark);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.frequency-volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--mono-white);
  cursor: pointer;
  border: 2px solid var(--mono-darker);
  transition: var(--transition-smooth);
}

.frequency-volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.frequency-volume-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--mono-white);
  cursor: pointer;
  border: 2px solid var(--mono-darker);
  transition: var(--transition-smooth);
}

.volume-display {
  font-size: 0.875rem;
  color: var(--mono-white);
  font-weight: 600;
  min-width: 35px;
  text-align: center;
}

/* Mix Info */
.mix-info {
  background: var(--mono-darker);
  border: 1px solid var(--mono-dark);
  border-radius: 12px;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition-smooth);
}

.mix-info.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.pause-button, .stop-button {
  background: var(--mono-medium-dark);
  border: 1px solid var(--mono-medium);
  color: var(--mono-white);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-smooth);
}

.pause-button:hover, .stop-button:hover {
  background: var(--mono-medium);
  transform: translateY(-1px);
}

.pause-button.paused {
  background: var(--mono-medium);
  border-color: var(--mono-light);
}

.pause-button.paused .button-text::after {
  content: " (停止中)";
  font-size: 0.75rem;
  opacity: 0.7;
}

.volume-control, .reverb-control {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1;
  min-width: 200px;
}

.volume-control label, .reverb-control label {
  font-size: 0.875rem;
  color: var(--mono-light);
  min-width: 60px;
}

.volume-slider {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--mono-dark);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--mono-white);
  cursor: pointer;
  border: 2px solid var(--mono-darker);
  transition: var(--transition-smooth);
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.volume-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--mono-white);
  cursor: pointer;
  border: 2px solid var(--mono-darker);
  transition: var(--transition-smooth);
}

.volume-value {
  font-size: 0.875rem;
  color: var(--mono-light);
  min-width: 40px;
  text-align: right;
}

/* Mix info */
.mix-info {
  border-top: 1px solid var(--mono-dark);
  padding-top: 1.5rem;
}

.mix-info h3 {
  font-size: 1.125rem;
  color: var(--mono-white);
  margin-bottom: 1rem;
}

.mix-stats p {
  font-size: 0.875rem;
  color: var(--mono-light);
  margin-bottom: 0.5rem;
}

.no-active {
  color: var(--mono-medium-light);
  font-style: italic;
}

.active-frequencies {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.active-frequency-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  background: var(--mono-dark);
  border-radius: 6px;
  border-left: 3px solid var(--item-color, var(--mono-white));
}

.frequency-name {
  font-weight: 600;
  color: var(--item-color, var(--mono-white));
  font-size: 0.875rem;
}

.frequency-desc {
  font-size: 0.75rem;
  color: var(--mono-light);
  flex: 1;
  margin: 0 1rem;
}

.volume-indicator {
  font-size: 0.75rem;
  color: var(--mono-white);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

/* Loading indicator */
.loading-indicator {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(17, 17, 17, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-smooth);
}


.loading-indicator.visible {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--mono-dark);
  border-top: 3px solid var(--mono-white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-indicator p {
  color: var(--mono-light);
  font-size: 0.875rem;
}




/* Responsive design */
@media (max-width: 768px) {
  .app-header h1 {
    font-size: 2rem;
  }
  
  .main-content {
    padding: 1rem 0.5rem;
    gap: 1.5rem;
  }
  
  .control-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    padding: 1rem;
  }
  
  .control-buttons {
    justify-content: center;
  }
  
  .visual-controls {
    justify-content: center;
    margin: 0;
    flex-wrap: wrap;
  }
  
  .visual-toggle {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }
  
  .control-sliders {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }
  
  .volume-control, .reverb-control {
    width: 100%;
  }
  
  .frequency-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .frequency-card {
    padding: 1.25rem;
    margin: 0;
  }
  
  .card-controls {
    gap: 0.75rem;
  }
  
  .waveform-monitor {
    padding: 0.5rem;
    max-width: 100%;
  }
  
  #waveformCanvas {
    height: 80px;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 1rem 0.5rem;
  }
  
  .app-header {
    padding: 1.5rem 0.5rem 1rem;
  }
  
  .mix-info {
    padding: 1rem;
  }
  
  .frequency-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding: 0;
  }
  
  .frequency-card {
    padding: 1rem;
  }
}