/* Design Tokens & Variables (Voluma Nordic Glacier Mint Theme) */
:root {
  --bg-deep: #080c14;
  --bg-panel: rgba(13, 20, 36, 0.72);
  --bg-panel-solid: #0d1527;
  --bg-card: rgba(22, 33, 56, 0.45);
  --border-light: rgba(255, 255, 255, 0.05);
  --border-gold: rgba(16, 185, 129, 0.12); /* Subtle mint border */
  --border-glow: rgba(16, 185, 129, 0.25);
  
  /* Glacier Mint & Ice Blue Accents */
  --accent-gold: #10b981;       /* Bright Glacier Mint */
  --accent-gold-glow: rgba(16, 185, 129, 0.45);
  --accent-bronze: #059669;     /* Deep Emerald Teal */
  --accent-purple: #06b6d4;     /* Ice Blue/Cyan */
  --accent-purple-glow: rgba(6, 182, 212, 0.35);
  --accent-rose: #ef4444;       /* Coral Red (for deletes/warnings) */
  --accent-rose-glow: rgba(239, 68, 68, 0.4);
  --accent-green: #10b981;
  
  /* Neutral scale */
  --text-primary: #f1f5f9;
  --text-muted: #94a3b8;         /* Slate muted text */
  --text-dark: #334155;          /* Dark slate gray */
  
  /* Layout units */
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Orbitron', monospace;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Global */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-sans);
  overflow-x: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: rgba(13, 20, 36, 0.5);
}
::-webkit-scrollbar-thumb {
  background: var(--text-dark);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-gold);
}

/* Ambient Radial Glow BG */
.glow-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.glow-sphere {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.2;
}

.glow-sphere.mint {
  width: 55vw;
  height: 55vh;
  top: -10vh;
  left: -10vh;
  background: radial-gradient(circle, var(--accent-gold) 0%, transparent 70%);
}

.glow-sphere.ice {
  width: 65vw;
  height: 65vh;
  bottom: -15vh;
  right: -10vh;
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
}

/* Main Layout Grid */
.app-container {
  position: relative;
  z-index: 1;
  width: 100vw;
  height: 100vh;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Header */
.app-header {
  height: 64px;
  min-height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-panel);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 0 24px;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  color: var(--accent-gold);
  filter: drop-shadow(0 0 8px var(--accent-gold-glow));
}

.logo-area h1 {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 2.5px;
  color: var(--text-primary);
  text-shadow: 0 0 10px var(--accent-gold-glow);
}

.file-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.file-bubble {
  display: flex;
  flex-direction: column;
  background: rgba(13, 20, 36, 0.85);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  max-width: 320px;
  font-size: 12px;
  transition: opacity var(--transition-normal);
}

.file-bubble.hidden {
  opacity: 0;
  pointer-events: none;
}

.file-name {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-details {
  color: var(--text-muted);
  font-size: 11px;
}

/* Panels Common */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-primary);
}

.panel-title svg {
  color: var(--accent-gold);
}

/* App Workspace Grid */
.app-workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 16px;
  overflow: hidden;
}

.main-panel {
  flex: 1;
  position: relative;
  overflow-y: auto;
}

.side-panel {
  width: 340px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: transparent;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
}

.side-module {
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.visualizer-module {
  height: 230px;
}

.splitter-module {
  flex: 1;
  overflow: hidden;
}

/* Button & UI Atoms */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  color: var(--text-primary);
  background: rgba(22, 33, 56, 0.6);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

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

.btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-bronze) 100%);
  border-color: transparent;
  color: #080c14;
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #34d399 0%, var(--accent-gold) 100%);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: #c7d2fe;
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(6, 182, 212, 0.25);
  border-color: var(--accent-purple);
  color: #fff;
}

.btn-glow {
  box-shadow: 0 0 16px 0 var(--accent-gold-glow);
}

.btn-glow-indigo {
  background: linear-gradient(135deg, var(--accent-purple) 0%, #0891b2 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 16px 0 var(--accent-purple-glow);
}

.btn-glow-indigo:hover:not(:disabled) {
  background: linear-gradient(135deg, #38bdf8 0%, var(--accent-purple) 100%);
  transform: translateY(-1px);
}

.btn-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-large {
  width: 54px;
  height: 54px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 11px;
  border-radius: 4px;
}

.btn-icon {
  padding: 6px;
  border-radius: 4px;
}

.btn-icon-only {
  width: 32px;
  height: 32px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-toggle {
  background: rgba(22, 33, 56, 0.5);
  border-color: var(--border-light);
}

.btn-toggle.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
  box-shadow: 0 0 12px 0 var(--accent-gold-glow);
}

/* Pulse animation for playing indicator */
.btn-pulse {
  position: relative;
}

.btn-pulse.playing::after {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  border: 2px solid var(--accent-gold);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.3); opacity: 0; }
}

/* Drag and drop overlay */
.drop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(8, 12, 20, 0.92);
  border: 3px dashed var(--accent-gold);
  border-radius: var(--radius-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(8px);
  transition: all var(--transition-normal);
}

.drop-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.drop-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  color: var(--accent-gold);
  text-shadow: 0 0 10px var(--accent-gold-glow);
}

.drop-message p {
  color: var(--text-muted);
  text-shadow: none;
  font-size: 14px;
}

/* Waveform Workspace Section */
.waveform-zoom-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.waveform-zoom-controls.floating {
  position: absolute;
  top: 30px; /* Offset to clear the time-ruler height */
  right: 15px;
  z-index: 20;
  background: rgba(13, 20, 36, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-sm);
  padding: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 6px 20px 0 rgba(0, 0, 0, 0.5);
}

.zoom-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: rgba(13, 20, 36, 0.7);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-light);
  min-width: 48px;
  text-align: center;
}

.waveform-container {
  flex: 1;
  position: relative;
  margin: 16px 20px;
  background: rgba(9, 13, 23, 0.95);
  border: 1px solid rgba(16, 185, 129, 0.08);
  border-radius: var(--radius-md);
  box-shadow: inset 0 2px 12px 0 rgba(0, 0, 0, 0.6);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.ruler-ticks {
  height: 20px;
  background: rgba(8, 12, 20, 0.9);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  overflow: hidden;
  pointer-events: none;
}

.ruler-tick {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.05);
}

.ruler-tick.major {
  background: rgba(16, 185, 129, 0.2);
}

.ruler-tick span {
  position: absolute;
  left: 4px;
  bottom: 2px;
  white-space: nowrap;
}

.waveform-scroller {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  position: relative;
}

#waveform-canvas {
  display: block;
  height: 100%;
  cursor: text;
}

/* Playhead Marker */
.playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--accent-gold);
  z-index: 10;
  box-shadow: 0 0 10px var(--accent-gold-glow);
  pointer-events: none;
}

.playhead::after {
  content: '';
  position: absolute;
  top: 0;
  left: -4px;
  width: 10px;
  height: 10px;
  background: var(--accent-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 8px var(--accent-gold);
}

/* Selection Box overlay */
.selection-box {
  position: absolute;
  top: 20px; /* offset ruler */
  bottom: 0;
  background-color: var(--accent-purple-glow);
  border-left: 1.5px solid var(--accent-purple);
  border-right: 1.5px solid var(--accent-purple);
  pointer-events: none;
  z-index: 5;
}

/* HUD Panel Readout */
.hud-readout-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 0 20px 16px 20px;
}

.hud-item {
  background: rgba(13, 20, 36, 0.55);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hud-item.highlight-indigo {
  border-color: rgba(6, 182, 212, 0.35);
}

.hud-item.highlight-indigo .hud-value {
  color: #93c5fd;
}

.hud-item.highlight-gold {
  border-color: rgba(16, 185, 129, 0.3);
}

.hud-item.highlight-gold .hud-value {
  color: var(--accent-gold);
}

.hud-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.hud-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.font-digital {
  font-family: var(--font-mono);
}

/* Workstation Decks and controls */
.workstation-decks {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 20px 20px 20px;
  border-top: 1px solid var(--border-light);
  background: rgba(13, 20, 36, 0.2);
  padding-top: 16px;
}

.deck h3 {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.deck-row {
  display: flex;
  align-items: center;
  gap: 24px;
}

.flex-wrap {
  flex-wrap: wrap;
}

.btn-group {
  display: flex;
  gap: 8px;
}

/* Sliders Control */
.slider-control {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(13, 20, 36, 0.6);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  height: 38px;
}

.input-slider {
  -webkit-appearance: none;
  appearance: none;
  background: rgba(255, 255, 255, 0.08);
  height: 4px;
  border-radius: 2px;
  outline: none;
  width: 180px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.input-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-primary);
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.8);
  transition: all var(--transition-fast);
}

.input-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: var(--accent-gold);
  box-shadow: 0 0 10px var(--accent-gold-glow);
}

.input-slider.gold-slider::-webkit-slider-thumb {
  background: var(--accent-gold);
}

.input-slider.gold-slider::-webkit-slider-thumb:hover {
  background: #34d399;
  box-shadow: 0 0 10px var(--accent-gold-glow);
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 11px;
  min-width: 36px;
  text-align: right;
  color: var(--text-muted);
}

.highlight-gold {
  color: var(--accent-gold) !important;
}

/* Gain / Processors details */
.processor-module {
  display: flex;
  align-items: center;
  gap: 10px;
}

.module-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.fx-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.highlight-border-magenta:hover:not(:disabled) {
  border-color: var(--accent-rose);
  color: #fff;
  background: rgba(239, 68, 68, 0.15);
}

.history-actions {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

/* Side Panel: Visualizations */
.visualizer-card {
  flex: 1;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: rgba(8, 12, 20, 0.5);
  box-shadow: inset 0 2px 10px 0 rgba(0, 0, 0, 0.4);
}

.visualizer-display {
  flex: 1;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: rgba(13, 20, 36, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.02);
}

#frequency-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* LED VU Meters */
.vu-meters-container {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 6px;
}

.vu-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-muted);
  font-weight: 700;
}

.vu-channel {
  height: 6px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.vu-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--accent-gold) 60%, #eab308 82%, var(--accent-rose) 95%);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.35);
  transition: width 0.08s ease-out;
}

/* Splitter & Regions Sidebar */
.splitter-content {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.regions-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.regions-list-header span {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.badge {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.28);
  color: var(--accent-gold);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
}

.regions-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 4px;
}

.regions-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 12px;
  color: var(--text-dark);
  padding: 24px 0;
  height: 100%;
}

.regions-empty-state svg {
  color: var(--text-dark);
}

.regions-empty-state p {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

.help-text {
  font-size: 10px;
  color: var(--text-dark);
  line-height: 1.4;
  max-width: 220px;
}

/* Saved Region Item styling */
.region-item {
  background: rgba(22, 33, 56, 0.35);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition-fast);
}

.region-item:hover {
  background: rgba(22, 33, 56, 0.55);
  border-color: rgba(16, 185, 129, 0.22);
  transform: translateY(-1px);
}

.region-item.active {
  border-color: var(--accent-gold);
  background: rgba(16, 185, 129, 0.06);
  box-shadow: 0 0 12px 0 rgba(16, 185, 129, 0.1);
}

.region-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.region-title-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 0;
  outline: none;
  width: 140px;
  transition: border var(--transition-fast);
}

.region-title-input:focus {
  border-color: var(--accent-gold);
}

.region-duration {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
}

.region-times {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dark);
}

.region-times span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.region-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.03);
  padding-top: 6px;
}

.region-mini-btn-group {
  display: flex;
  gap: 6px;
}

.btn-mini {
  padding: 4px;
  background: rgba(13, 20, 36, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.btn-mini:hover {
  background: var(--text-dark);
  color: #fff;
}

.btn-mini.play-mini:hover {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-gold);
  color: var(--accent-gold);
}

.btn-mini.delete-mini:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: var(--accent-rose);
  color: var(--accent-rose);
}

.btn-mini.export-mini {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-gold);
}

.btn-mini.export-mini:hover {
  background: var(--accent-gold);
  color: #080c14;
  border-color: transparent;
}

/* Utilities */
.mb-3 { margin-bottom: 12px; }
.mt-3 { margin-top: 12px; }
.mr-2 { margin-right: 8px; }
.btn-full { width: 100%; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* Footer status bar */
.app-footer {
  height: 32px;
  min-height: 32px;
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  font-size: 11px;
  color: var(--text-muted);
  backdrop-filter: blur(12px);
}

.status-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.green {
  background: var(--accent-gold);
  box-shadow: 0 0 8px var(--accent-gold);
}

.status-dot.pulsing {
  animation: status-pulse 1s infinite alternate;
}

@keyframes status-pulse {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.2); opacity: 1; }
}

.status-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.separator {
  color: var(--text-dark);
}

/* Animation utilities */
.pulse-color {
  animation: pulse-color-anim 2s infinite alternate;
}

@keyframes pulse-color-anim {
  0% { color: var(--accent-gold); }
  100% { color: var(--accent-purple); }
}