:root {
  color-scheme: dark;

  --bg-base: #0a0a0c;
  --bg-surface: #121316;
  --bg-elevated: #181a1f;
  --border-color: #23262e;

  --text-primary: #f2f4f8;
  --text-secondary: #98a0ae;
  --text-muted: #646b78;

  --accent: #3b9eff;
  --danger: #ff453a;

  /* 8-Band Curve & Node Palette */
  --band-0: #ff453a;
  --band-1: #ff9f0a;
  --band-2: #ffd60a;
  --band-3: #32d74b;
  --band-4: #64d2ff;
  --band-5: #0a84ff;
  --band-6: #bf5af2;
  --band-7: #ff375f;

  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Display", "Segoe UI", Roboto, sans-serif;

  accent-color: var(--accent);
}

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

[hidden] {
  display: none !important;
}

html,
body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.4;
  accent-color: var(--accent);
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  max-width: 1720px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Zone 1: Minimal Top Bar */
.transport-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 18px;
}

.app-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.transport-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.control-group {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.control-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

/* Form Controls & Hit Targets (38px-44px minimum) */
select {
  min-height: 40px;
  background-color: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
}

select:disabled,
input[type="range"]:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

select:focus-visible,
button:focus-visible,
input:focus-visible,
canvas:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 6px;
  padding: 0 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background-color: var(--bg-elevated);
  color: var(--text-primary);
  user-select: none;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.btn:hover:not(:disabled) {
  border-color: var(--text-secondary);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--accent);
  color: #0a0a0c;
  border-color: var(--accent);
}

.btn-primary:hover:not(:disabled) {
  background-color: #5bb0ff;
  border-color: #5bb0ff;
}

.btn-primary.playing {
  background-color: var(--text-primary);
  color: #0a0a0c;
  border-color: var(--text-primary);
}

.btn-secondary {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
}

.btn-full {
  width: 100%;
}

.power-btn {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.power-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.power-btn .power-led {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--text-muted);
}

.power-btn.active {
  color: var(--text-primary);
  border-color: var(--accent);
}

.power-btn.active .power-led {
  background-color: var(--accent);
}

/* Studio Workspace: 2 Columns (Left Channel Strip + Right Hero Stage) */
.studio-workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

/* Zone 2: Clean Left Channel Strip */
.channel-strip {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.strip-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

.strip-title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.strip-preset-box {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.strip-field-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

.strip-preset-box select {
  width: 100%;
}

.strip-preset-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.strip-inserts-section {
  flex: 1;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.fx-slots-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fx-slot-card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.12s ease, opacity 0.12s ease;
}

.fx-slot-card:hover {
  border-color: var(--text-secondary);
}

.fx-slot-card.active-slot {
  border-color: var(--accent);
}

.fx-slot-card.bypassed-slot {
  opacity: 0.55;
}

.fx-slot-card.drag-over {
  border-color: var(--accent);
}

.slot-top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.slot-left-cluster {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}

.slot-bypass-btn {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}

.slot-bypass-btn .slot-power-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--text-muted);
}

.slot-bypass-btn.on {
  border-color: var(--accent);
}

.slot-bypass-btn.on .slot-power-dot {
  background-color: var(--accent);
}

.slot-label-input {
  min-height: 36px;
  background-color: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  padding: 0 8px;
  width: 100%;
  min-width: 0;
  text-overflow: ellipsis;
}

.slot-label-input:hover,
.slot-label-input:focus {
  background-color: var(--bg-base);
  border-color: var(--border-color);
}

/* Clip Indicator: Hidden unless clipping occurs */
.clip-pill {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 8px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 700;
  background-color: var(--danger);
  color: #0a0a0c;
  border: none;
  cursor: pointer;
}

.clip-pill.clip-active {
  display: inline-flex;
}

/* Mini EQ Curve Thumbnail inside Channel Strip Slot */
.slot-thumb-wrap {
  position: relative;
  height: 48px;
  width: 100%;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.slot-mini-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.slot-actions-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}

.slot-icon-btn {
  min-width: 36px;
  min-height: 36px;
  background-color: var(--bg-base);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.slot-icon-btn:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.slot-icon-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.slot-icon-btn.danger:hover:not(:disabled) {
  color: var(--danger);
  border-color: var(--danger);
}

.strip-empty-state {
  padding: 20px 14px;
  text-align: center;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* Channel Strip Master Output Gain & Meter */
.strip-output-section {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: stretch;
}

.output-gain-col {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.output-gain-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.gain-readout {
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.output-gain-slider {
  width: 100%;
  height: 36px;
  accent-color: var(--accent);
  cursor: ew-resize;
}

.phase-btn.active {
  border-color: var(--accent);
  color: var(--accent);
}

.meter-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.meter-bars {
  display: flex;
  gap: 6px;
  height: 96px;
}

.meter-track {
  position: relative;
  width: 14px;
  height: 100%;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.meter-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  background-color: var(--accent);
  transition: height 0.04s linear;
}

.meter-peak-cap {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  bottom: 0%;
  background-color: var(--text-primary);
}

.meter-readouts {
  display: flex;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

/* Zone 3: Hero EQ Stage */
.plugin-window {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* Compact Stage Header */
.plugin-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
}

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

.toolbar-select-group {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
}

.plugin-toolbar select {
  padding: 0 6px;
}

.plugin-toolbar .btn,
.plugin-toolbar .power-btn {
  padding: 0 10px;
}

.toolbar-toggle-pill {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

.toolbar-toggle-pill:has(input:disabled) {
  opacity: 0.4;
  cursor: not-allowed;
}

.toolbar-toggle-pill input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--accent);
}

/* Massive Interactive Canvas Hero (70vh+) */
.plugin-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 70vh;
  border-bottom: 1px solid var(--border-color);
}

.graph-container {
  position: relative;
  flex: 1;
  min-height: 70vh;
  background-color: var(--bg-base);
  overflow: hidden;
}

#eq-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

.graph-tooltip {
  position: absolute;
  pointer-events: none;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  white-space: nowrap;
  z-index: 10;
}

/* Single Focused Selected Band Bar */
.selected-band-bar {
  padding: 16px 20px;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.band-selector-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.band-ribbon {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.ribbon-pill {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.12s ease, color 0.12s ease, background-color 0.12s ease;
}

.ribbon-pill:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.ribbon-pill .band-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--band-color);
  opacity: 0.35;
}

.ribbon-pill.enabled {
  color: var(--text-primary);
}

.ribbon-pill.enabled .band-dot {
  opacity: 1;
}

.ribbon-pill.selected {
  color: var(--text-primary);
  border-color: var(--accent);
  background-color: var(--bg-base);
}

/* 3 Huge Hero Readouts / Controls Grid */
.hero-params-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.hero-param-card {
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
}

.hero-param-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.hero-param-label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.hero-sub-readout {
  font-size: 13px;
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  margin-left: 6px;
}

.hero-readout {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.hero-slider {
  width: 100%;
  height: 40px;
  margin: 0;
  accent-color: var(--accent);
  cursor: ew-resize;
}

.hero-select {
  width: 100%;
  min-height: 42px;
  font-size: 16px;
  font-weight: 700;
}

.quick-add-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.stage-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

#limiter-canvas,
#alm-canvas,
#breath-canvas,
#pitch-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: ns-resize;
  touch-action: none;
}

.pitch-note-btn {
  min-width: 38px;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 8px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  transition: border-color 0.12s ease, color 0.12s ease, background-color 0.12s ease;
}

.pitch-note-btn:hover:not(:disabled) {
  border-color: var(--text-secondary);
}

.pitch-note-btn.active {
  color: var(--text-primary);
  border-color: var(--accent);
  background-color: var(--bg-base);
}

.pitch-note-btn.locked-target {
  background-color: var(--accent);
  color: #0a0a0c;
  border-color: var(--accent);
}

.pitch-note-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.hero-param-card.muted-card {
  opacity: 0.45;
}

.toolbar-range {
  width: 96px;
  height: 36px;
  margin: 0;
  accent-color: var(--accent);
  cursor: ew-resize;
}

.toolbar-readout {
  min-width: 52px;
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

.band-pill {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.band-pill.enabled {
  color: var(--text-primary);
}

.band-pill.selected {
  color: var(--text-primary);
  border-color: var(--accent);
  background-color: var(--bg-base);
}

.limiter-gr-pill {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0 14px;
}

.limiter-gr-value {
  font-size: 20px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

/* Progressive Enhancement Fallback for older browsers without accent-color */
@supports not (accent-color: #3b9eff) {
  input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
  }

  input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
  }

  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    margin-top: -6px;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1180px) {
  .studio-workspace {
    grid-template-columns: 1fr;
  }

  .fx-slots-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

@media (max-width: 820px) {
  .app-shell {
    padding: 10px 12px;
    gap: 12px;
  }

  .plugin-stage,
  .graph-container {
    min-height: 52vh;
  }

  .selected-band-bar {
    padding: 14px;
    gap: 12px;
  }

  .hero-params-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}