:root {
  --bg-stage: #0a0a0c;
  --bg-panel: #111114;
  --accent-red: #e63946;
  --accent-red-dim: #7a1f26;
  --text-primary: #f1f1f1;
  --text-secondary: #88888a;
  --grid-line: #1a1a1e;
  --grid-active: #e63946;
  --mono: 'Courier New', Courier, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

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

html, body {
  width: 100%;
  height: 100%;
  background: var(--bg-stage);
  color: var(--text-primary);
  font-family: var(--sans);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* Header */
#header {
  background: var(--bg-panel);
  border-bottom: 1px solid var(--grid-line);
  padding: 12px 20px;
  flex-shrink: 0;
}

#title {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  user-select: none;
}

#controls {
  display: flex;
  gap: 24px;
  align-items: center;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 120px;
}

.control-group label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  user-select: none;
}

.control-group input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--grid-line);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-red);
  border: 2px solid var(--bg-stage);
  cursor: pointer;
  transition: box-shadow 0.1s;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 8px var(--accent-red);
}

.control-group input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-red);
  border: 2px solid var(--bg-stage);
  cursor: pointer;
}

.control-group span {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent-red);
  text-align: right;
  user-select: none;
}

/* Stage */
#stage {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#grid-canvas {
  flex: 3;
  width: 100%;
  display: block;
  cursor: crosshair;
}

#waveform-canvas {
  flex: 1;
  width: 100%;
  display: block;
  border-top: 1px solid var(--grid-line);
}

#status {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 28px;
  background: rgba(10, 10, 12, 0.85);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-secondary);
  border-top: 1px solid var(--grid-line);
}

.indicator {
  padding: 2px 6px;
  border-radius: 2px;
  background: var(--grid-line);
  transition: background 0.08s, color 0.08s;
}

.indicator.active {
  background: var(--accent-red);
  color: var(--bg-stage);
}

/* Patch Info */
#patch-info {
  background: var(--bg-panel);
  border-top: 1px solid var(--grid-line);
  padding: 8px 20px;
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 1px;
}

#patch-name {
  color: var(--accent-red);
}

#patch-desc {
  color: var(--text-secondary);
}