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

:root {
  --accent: #ff4af8;
  --bg: #0a0a0a;
  --panel-bg: rgba(10, 10, 10, 0.82);
  --text: #f0f0f0;
  --text-dim: #888;
  --radius: 8px;
  --font: system-ui, -apple-system, sans-serif;

  --color-peak:      #ffb700;
  --color-predicted: #39ff14;
  --color-chord:     #ff3b3b;
  --color-downbeat:  #ff4af8;
  --color-loudness:  #00ffff;
  --color-key:       #ffffff;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

/* Event grid */
#grid {
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 4px;
  background: #000;
}

.quad {
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

#quad-peak      { --quad-color: var(--color-peak);      background: color-mix(in srgb, var(--color-peak) 6%, black); }
#quad-predicted { --quad-color: var(--color-predicted); background: color-mix(in srgb, var(--color-predicted) 6%, black); }
#quad-chord     { --quad-color: var(--color-chord);     background: color-mix(in srgb, var(--color-chord) 6%, black); }
#quad-downbeat  { --quad-color: var(--color-downbeat);  background: color-mix(in srgb, var(--color-downbeat) 6%, black); }
#quad-loudness  { --quad-color: var(--color-loudness);  background: color-mix(in srgb, var(--color-loudness) 6%, black); }
#quad-key       { --quad-color: var(--color-key);       background: color-mix(in srgb, var(--color-key) 4%, black); }

.quad-label {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.35);
}

#status-bar {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  font-size: 0.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  background: var(--panel-bg);
  padding: 4px 12px;
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  letter-spacing: 0.02em;
}

#record-indicator {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  right: 12px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: #ff3b3b;
  background: var(--panel-bg);
  padding: 4px 12px;
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

#record-indicator::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff3b3b;
  animation: record-blink 1s steps(2, start) infinite;
}

@keyframes record-blink {
  50% { opacity: 0.15; }
}

#record-indicator.hidden {
  display: none;
}

.record-btn-active {
  background: #ff3b3b !important;
  color: #fff !important;
  outline: 2px solid #fff;
}

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  cursor: pointer;
}

.scope-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.overlay-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  max-width: 90vw;
}

.overlay-content h1 {
  font-size: clamp(2rem, 9vw, 6rem);
  color: #fff;
  line-height: 1;
}

.title-beat {
  font-family: 'Raleway', sans-serif;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.title-finder {
  font-family: 'Raleway', sans-serif;
  font-weight: 100;
}

.overlay-hint {
  color: var(--text-dim);
  font-size: 1rem;
}

.overlay.hidden {
  display: none;
}

/* Buttons */
.btn {
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
}

.btn-fab {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 32px;
  border-radius: 32px 32px 0 0;
  background: var(--panel-bg);
  color: var(--text);
  font-size: 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom: none;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.btn-fab:active {
  transform: translateX(-50%) scale(0.95);
}

/* Control Panel */
.controls {
  position: fixed;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 40px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  width: min(92vw, 420px);
  max-height: 75vh;
  overflow-y: auto;
  transition: opacity 0.25s, transform 0.25s;
  background: #0000a8;
  color: #fff;
  font-family: "Lucida Console", monospace;
  font-size: 14px;
}

.controls .play-track-name,
.controls .time-display {
  color: inherit;
  font-family: inherit;
}

.controls.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(12px);
}

.controls .tui-fieldset {
  width: 100%;
  box-sizing: border-box;
}

.controls .tui-button:active {
  transform: translate(2px, 2px) !important;
  box-shadow: none !important;
}

.controls input[type="range"] {
  height: 10px;
  background: #000055;
  border: 1px solid #aaaaff;
  border-radius: 0;
}
.controls input[type="range"]::-webkit-slider-thumb {
  width: 12px;
  height: 18px;
  border-radius: 0;
  background: #ffffff;
  border: none;
  cursor: pointer;
}
.controls input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 18px;
  border-radius: 0;
  background: #ffffff;
  border: none;
  cursor: pointer;
}

.controls-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

input[type="range"] {
  flex: 1;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
}

.mode-btn {
  -webkit-tap-highlight-color: transparent;
}

.mode-btn-active {
  outline: 2px solid #fff;
}

/* File player */
.file-player {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 14px;
}

.file-player.hidden {
  display: none;
}

.play-track-name {
  font-size: 0.78rem;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.seek-wrap {
  width: 100%;
}

.time-display {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.player-controls {
  justify-content: center;
  flex-wrap: nowrap;
}

/* Tuning panel */
.tuning-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.tuning-panel.hidden {
  display: none;
}

.tuning-group-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #aaaaff;
  margin-bottom: 6px;
}

.tuning-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 8px;
}

.tuning-row-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: #fff;
}

.tuning-row-value {
  font-variant-numeric: tabular-nums;
  color: #aaaaff;
}

.tuning-row select {
  background: #000055;
  border: 1px solid #aaaaff;
  color: #fff;
  font-family: inherit;
  font-size: 0.75rem;
  padding: 4px;
}

/* Save-recording fallback panel */
.save-recording-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.save-recording-panel.hidden {
  display: none;
}

.save-recording-label {
  font-size: 0.78rem;
  color: #aaaaff;
}

/* Error message */
.error-msg {
  color: #ff6060;
  font-size: 0.85rem;
}

.hidden {
  display: none !important;
}

/* Responsive tweaks */
@media (max-width: 400px) {
  .controls {
    padding: 12px 14px;
    gap: 10px;
  }

  .quad-label {
    font-size: 0.65rem;
  }

  .quad {
    padding: 8px;
  }
}