/* ============================================================
   SoundForge Studio — Design System & Styles
   ============================================================ */

/* ---- CSS Custom Properties (Dark Theme Default) ---- */
:root,
[data-theme="dark"] {
  --bg-base: #0b0e14;
  --bg-surface: #131720;
  --bg-elevated: #1a1f2e;
  --bg-panel: rgba(22, 28, 45, 0.75);
  --bg-input: #0f1320;
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 224, 196, 0.25);
  --text-primary: #e8ecf4;
  --text-secondary: #8892a6;
  --text-muted: #4f5868;
  --accent: #00e0c4;
  --accent-hover: #00ffd5;
  --accent-glow: rgba(0, 224, 196, 0.35);
  --accent-alt: #a855f7;
  --accent-alt-glow: rgba(168, 85, 247, 0.3);
  --warn: #f59e0b;
  --danger: #ef4444;
  --success: #22c55e;
  --slider-track: #1e2535;
  --slider-fill: var(--accent);
  --slider-thumb: #ffffff;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;
  --glass-bg: rgba(22, 28, 45, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 18px;
  --disc-bg: linear-gradient(135deg, #1a1a2e, #16213e);
  --disc-groove: rgba(255, 255, 255, 0.03);
  --disc-label-bg: var(--accent);
  --disc-label-text: #0b0e14;
  --canvas-line: var(--accent);
  --canvas-fill: rgba(0, 224, 196, 0.12);
  --canvas-bar: var(--accent);
  --canvas-bar-alt: var(--accent-alt);
  --vu-green: #22c55e;
  --vu-yellow: #f59e0b;
  --vu-red: #ef4444;
  --header-bg: rgba(11, 14, 20, 0.85);
}

[data-theme="light"] {
  --bg-base: #f0f2f7;
  --bg-surface: #ffffff;
  --bg-elevated: #f7f8fc;
  --bg-panel: rgba(255, 255, 255, 0.8);
  --bg-input: #edf0f7;
  --border: rgba(0, 0, 0, 0.08);
  --border-accent: rgba(99, 102, 241, 0.25);
  --text-primary: #1a1d2e;
  --text-secondary: #5a6178;
  --text-muted: #9ca3b4;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --accent-alt: #d946ef;
  --accent-alt-glow: rgba(217, 70, 239, 0.2);
  --warn: #d97706;
  --danger: #dc2626;
  --success: #16a34a;
  --slider-track: #dde1ec;
  --slider-fill: var(--accent);
  --slider-thumb: #ffffff;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(0, 0, 0, 0.06);
  --glass-blur: 18px;
  --disc-bg: linear-gradient(135deg, #e0e3ee, #c7cde0);
  --disc-groove: rgba(0, 0, 0, 0.04);
  --disc-label-bg: var(--accent);
  --disc-label-text: #ffffff;
  --canvas-line: var(--accent);
  --canvas-fill: rgba(99, 102, 241, 0.1);
  --canvas-bar: var(--accent);
  --canvas-bar-alt: var(--accent-alt);
  --vu-green: #16a34a;
  --vu-yellow: #d97706;
  --vu-red: #dc2626;
  --header-bg: rgba(240, 242, 247, 0.88);
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ---- Utility ---- */
.hidden {
  display: none !important;
}

/* ---- Glass Panel ---- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: background 0.4s, border-color 0.4s, box-shadow 0.4s;
}

/* ============================================================
   HEADER
   ============================================================ */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s, border-color 0.4s;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
}

.logo-icon {
  color: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}

.logo h1 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-accent {
  color: var(--accent);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--accent);
  color: #0b0e14;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-panel);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-icon {
  background: transparent;
  color: var(--text-secondary);
  padding: 0.5rem;
  border-radius: var(--radius-full);
}

.btn-icon:hover {
  background: var(--bg-elevated);
  color: var(--accent);
}

/* Theme toggle icon visibility */
[data-theme="dark"] .icon-moon {
  display: none;
}

[data-theme="dark"] .icon-sun {
  display: block;
}

[data-theme="light"] .icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: block;
}

/* ============================================================
   PLAYER SECTION
   ============================================================ */
.player-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.5rem 1rem;
  gap: 1.25rem;
}

/* ---- Vinyl Disc ---- */
.disc-container {
  position: relative;
  width: 180px;
  height: 180px;
}

.disc-glow {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}

.disc-container.playing .disc-glow {
  opacity: 1;
}

.vinyl-disc {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--disc-bg);
  position: relative;
  box-shadow:
    inset 0 0 30px rgba(0, 0, 0, 0.3),
    0 4px 30px rgba(0, 0, 0, 0.3);
  animation: spin 3s linear infinite;
  animation-play-state: paused;
  overflow: hidden;
}

.disc-container.playing .vinyl-disc {
  animation-play-state: running;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.disc-outer-ring {
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  border: 1px solid var(--disc-groove);
}

.disc-grooves {
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: repeating-radial-gradient(circle at center,
      transparent 0px,
      transparent 3px,
      var(--disc-groove) 3px,
      var(--disc-groove) 4px);
}

.disc-inner-ring {
  position: absolute;
  inset: 50px;
  border-radius: 50%;
  border: 1px solid var(--disc-groove);
}

.disc-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--disc-label-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 15px var(--accent-glow);
}

.disc-label-text {
  font-size: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--disc-label-text);
  text-align: center;
  line-height: 1.2;
  max-width: 48px;
  overflow: hidden;
  text-overflow: ellipsis;
  /* Counter-rotate so text doesn't spin */
  animation: counter-spin 3s linear infinite;
  animation-play-state: paused;
}

.disc-container.playing .disc-label-text {
  animation-play-state: running;
}

@keyframes counter-spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(-360deg);
  }
}

.disc-center-hole {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-base);
  box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.5);
}

/* ---- Playback Controls ---- */
.playback-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-control {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
}

.btn-control:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--bg-panel);
}

.btn-play {
  background: var(--accent);
  color: #0b0e14;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px var(--accent-glow);
  border: none;
}

.btn-play:hover:not(:disabled) {
  transform: scale(1.08);
  box-shadow: 0 6px 30px var(--accent-glow);
}

.btn-play .pause-icon {
  display: none;
}

.btn-play.is-playing .play-icon {
  display: none;
}

.btn-play.is-playing .pause-icon {
  display: block;
}

/* ---- Timeline ---- */
.timeline-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  max-width: 600px;
  padding: 0 0.5rem;
}

.time-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  min-width: 3.5rem;
  text-align: center;
}

.timeline-wrapper {
  flex: 1;
  position: relative;
  height: 24px;
  display: flex;
  align-items: center;
}

.timeline-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: var(--slider-track);
  outline: none;
  cursor: pointer;
  position: relative;
  z-index: 2;
}

.timeline-slider:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.timeline-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  cursor: pointer;
  transition: transform 0.15s;
}

.timeline-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

.timeline-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  cursor: pointer;
  border: none;
}

.timeline-progress {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 5px;
  border-radius: 3px;
  background: var(--accent);
  pointer-events: none;
  z-index: 1;
  width: 0%;
  transition: width 0.05s linear;
}

/* ---- Status Bar ---- */
.status-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background 0.3s;
}

.status-dot.ready {
  background: var(--text-muted);
}

.status-dot.loaded {
  background: var(--accent);
}

.status-dot.playing {
  background: var(--success);
  box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
  animation: pulse-dot 1.5s ease infinite;
}

.status-dot.paused {
  background: var(--warn);
}

.status-dot.stopped {
  background: var(--danger);
}

.status-dot.exporting {
  background: var(--accent-alt);
  animation: pulse-dot 1s ease infinite;
}

@keyframes pulse-dot {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.4;
  }
}

/* ============================================================
   MAIN GRID
   ============================================================ */
.main-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 1.25rem;
  padding: 0 1.5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* Left column wrapper */
.left-panels {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: sticky;
  top: 70px;
  align-self: start;
}

/* ============================================================
   EFFECTS PANEL
   ============================================================ */
.effects-panel {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.25rem;
}

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

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-header label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.control-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--bg-input);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

/* ---- Styled Slider ---- */
.styled-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--slider-track);
  outline: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.styled-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--slider-thumb);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 0 3px var(--accent-glow);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.styled-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4), 0 0 0 5px var(--accent-glow);
}

.styled-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--slider-thumb);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 0 3px var(--accent-glow);
  cursor: pointer;
  border: none;
}

/* Slider color variants */
.slider-warn::-webkit-slider-thumb {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 0 3px rgba(245, 158, 11, 0.3);
}

.slider-accent::-webkit-slider-thumb {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 0 3px var(--accent-glow);
}

.slider-echo::-webkit-slider-thumb {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 0 3px var(--accent-alt-glow);
}

.slider-comp::-webkit-slider-thumb {
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 0 3px rgba(34, 197, 94, 0.3);
}

/* ---- Toggle Button Group ---- */
.btn-group {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.btn-toggle {
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-toggle:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.btn-toggle.active,
input[type="radio"]:checked+.btn-toggle,
.eq-preset-label:has(input[type="radio"]:checked) {
  background: var(--accent);
  color: #0b0e14;
  border-color: var(--accent);
  font-weight: 600;
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* ============================================================
   EQUALIZER PANEL
   ============================================================ */
.eq-panel {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ---- Preset Chips ---- */
.eq-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.eq-preset-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s ease;
  user-select: none;
}

.eq-preset-chip svg {
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.25s;
}

.eq-preset-chip:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.eq-preset-chip:hover svg {
  opacity: 1;
}

.eq-preset-chip:has(input[type="radio"]:checked) {
  background: linear-gradient(135deg, var(--accent), var(--accent-alt));
  color: #0b0e14;
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.eq-preset-chip:has(input[type="radio"]:checked) svg {
  opacity: 1;
}

/* ---- EQ Rack ---- */
.eq-rack {
  display: flex;
  gap: 0;
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 0.75rem 0.5rem;
  position: relative;
  overflow: hidden;
}

/* Horizontal grid lines — offset up to align with slider area */
.eq-rack::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 20px;
  /* offset for freq labels below sliders */
  /* 5 horizontal lines evenly spaced */
  background: repeating-linear-gradient(to bottom,
      transparent,
      transparent calc(20% - 0.5px),
      rgba(255, 255, 255, 0.06) calc(20% - 0.5px),
      rgba(255, 255, 255, 0.06) calc(20% + 0.5px),
      transparent calc(20% + 0.5px));
  pointer-events: none;
  z-index: 0;
}

/* Stronger 0dB center line — aligned with slider midpoint */
.eq-rack::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: calc(50% - 10px);
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
  pointer-events: none;
  z-index: 0;
}

/* EQ curve line connecting all thumbs */
.eq-curve {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 3;
  overflow: visible;
}

.eq-curve path {
  fill: none;
  stroke: rgba(111, 168, 220, 0.5);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* dB scale on the left */
.eq-scale {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  padding: 0.25rem 0.5rem 1.5rem 0.25rem;
  min-width: 32px;
  z-index: 1;
}

.eq-scale span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: rgba(255, 255, 255, 0.35);
  line-height: 1;
}

.eq-scale-zero {
  color: rgba(255, 255, 255, 0.55) !important;
  font-weight: 600;
}

/* Band container */
.eq-bands {
  display: flex;
  flex: 1;
  justify-content: space-around;
  gap: 0;
  z-index: 1;
}

.eq-band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
}

/* dB readout above each slider - hidden for clean look, kept for screen readers */
.eq-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0;
  width: 0;
  height: 0;
  overflow: hidden;
  position: absolute;
}

/* Frequency label below each slider */
.eq-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.01em;
  padding-top: 0.2rem;
}

.eq-label small {
  font-weight: 400;
  color: rgba(255, 255, 255, 0.25);
  font-size: 0.5rem;
  margin-left: 0;
}

/* Track wrapper (holds slider) */
.eq-track-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 160px;
  width: 36px;
  overflow: visible;
}

/* Zero-line indicator - hidden, using rack grid lines instead */
.eq-zero-line {
  display: none;
}

/* Vertical slider — the input element IS the visible track */
.eq-slider {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  writing-mode: vertical-lr;
  direction: rtl;
  width: 4px;
  height: 150px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  outline: none;
  position: relative;
  z-index: 2;
}

/* Hide the default track — the input bg IS the track */
.eq-slider::-webkit-slider-runnable-track {
  background: transparent;
  border: none;
  width: 100%;
  height: 100%;
}

.eq-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #6fa8dc;
  box-shadow: 0 1px 6px rgba(111, 168, 220, 0.4);
  margin-left: -5px;
  cursor: grab;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.eq-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: #87b9e5;
  box-shadow: 0 3px 14px rgba(111, 168, 220, 0.55);
}

.eq-slider:active::-webkit-slider-thumb {
  cursor: grabbing;
  transform: scale(1.0);
  background: #5a96cc;
}

.eq-slider::-moz-range-track {
  width: 4px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 2px;
  border: none;
}

.eq-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #6fa8dc;
  box-shadow: 0 2px 8px rgba(111, 168, 220, 0.4);
  border: none;
  cursor: grab;
}

/* ---- Light theme overrides ---- */
[data-theme="light"] .eq-rack {
  background: #edf2f7;
}

[data-theme="light"] .eq-rack::before {
  background: repeating-linear-gradient(to bottom,
      transparent,
      transparent calc(20% - 0.5px),
      rgba(0, 0, 0, 0.06) calc(20% - 0.5px),
      rgba(0, 0, 0, 0.06) calc(20% + 0.5px),
      transparent calc(20% + 0.5px));
}

[data-theme="light"] .eq-rack::after {
  background: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .eq-scale span {
  color: rgba(0, 0, 0, 0.35);
}

[data-theme="light"] .eq-scale-zero {
  color: rgba(0, 0, 0, 0.55) !important;
}

[data-theme="light"] .eq-label {
  color: rgba(0, 0, 0, 0.45);
}

[data-theme="light"] .eq-label small {
  color: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .eq-slider::-webkit-slider-runnable-track {
  background: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .eq-slider::-webkit-slider-thumb {
  background: #5b9bd5;
}

[data-theme="light"] .eq-slider::-moz-range-track {
  background: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .eq-slider::-moz-range-thumb {
  background: #5b9bd5;
}

/* ============================================================
   VISUALIZATIONS
   ============================================================ */
.viz-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.viz-panel {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.viz-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

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

.viz-canvas {
  width: 100%;
  height: 150px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
}

.viz-canvas-vu {
  height: 100px;
}

/* ============================================================
   OVERLAY / EXPORT MODAL
   ============================================================ */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.overlay-card {
  padding: 2.5rem 3rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.overlay-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ============================================================
   MISC TRANSITIONS
   ============================================================ */
.glass-panel,
.btn,
.btn-toggle,
.control-value,
.viz-canvas,
.time-display,
.status-text,
.logo,
.panel-title,
.control-header label {
  transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */

/* --- Large Tablets / Small Laptops (≤1024px) --- */
@media (max-width: 1024px) {
  .main-grid {
    grid-template-columns: 300px 1fr;
    gap: 1rem;
    padding: 0 1rem 1.5rem;
  }

  .disc-container {
    width: 150px;
    height: 150px;
  }

  .disc-inner-ring {
    inset: 40px;
  }

  .disc-label {
    width: 50px;
    height: 50px;
  }

  .disc-label-text {
    font-size: 0.42rem;
    max-width: 38px;
  }

  .eq-track-wrap {
    height: 130px;
  }

  .eq-slider {
    height: 120px;
  }
}

/* --- Tablets / Single column (≤900px) --- */
@media (max-width: 900px) {
  .main-grid {
    grid-template-columns: 1fr;
  }

  .left-panels {
    position: static;
  }
}

/* --- Tablet Portrait (≤768px) --- */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .app-header {
    padding: 0.6rem 1rem;
  }

  .header-right {
    gap: 0.4rem;
  }

  .header-right .btn {
    padding: 0.4rem 0.6rem;
    font-size: 0.75rem;
  }

  .header-right .btn svg {
    width: 16px;
    height: 16px;
  }

  .logo h1 {
    font-size: 1.05rem;
  }

  .player-section {
    padding: 1.5rem 1rem 0.75rem;
    gap: 1rem;
  }

  .disc-container {
    width: 140px;
    height: 140px;
  }

  .disc-inner-ring {
    inset: 38px;
  }

  .disc-label {
    width: 46px;
    height: 46px;
  }

  .disc-label-text {
    font-size: 0.4rem;
    max-width: 36px;
  }

  .timeline-container {
    max-width: 100%;
  }

  .btn-play {
    width: 50px;
    height: 50px;
  }

  .btn-play svg {
    width: 24px;
    height: 24px;
  }

  .btn-control {
    width: 40px;
    height: 40px;
  }

  .main-grid {
    padding: 0 0.75rem 1.5rem;
    gap: 0.75rem;
  }

  .effects-panel,
  .eq-panel {
    padding: 1rem;
  }

  .viz-canvas {
    height: 120px;
  }

  .viz-canvas-vu {
    height: 80px;
  }

  .overlay-card {
    padding: 2rem;
    margin: 1rem;
  }
}

/* --- Small Tablets / Large Phones (≤600px) --- */
@media (max-width: 600px) {
  .logo-icon {
    width: 22px;
    height: 22px;
  }

  .logo h1 {
    font-size: 0.95rem;
  }

  .disc-container {
    width: 120px;
    height: 120px;
  }

  .disc-grooves {
    inset: 8px;
  }

  .disc-inner-ring {
    inset: 32px;
  }

  .disc-label {
    width: 40px;
    height: 40px;
  }

  .disc-label-text {
    font-size: 0.38rem;
    max-width: 32px;
  }

  .disc-center-hole {
    width: 8px;
    height: 8px;
  }

  /* Effects panel: place filter and quality buttons in a grid */
  .btn-group {
    gap: 0.25rem;
  }

  .btn-toggle {
    padding: 0.3rem 0.55rem;
    font-size: 0.7rem;
  }

  /* EQ sliders shorter on smaller screens */
  .eq-track-wrap {
    height: 110px;
    width: 30px;
  }

  .eq-slider {
    height: 100px;
  }

  .eq-scale {
    min-width: 26px;
    padding: 0.25rem 0.35rem 1.2rem 0.15rem;
  }

  .eq-scale span {
    font-size: 0.5rem;
  }

  .eq-label {
    font-size: 0.55rem;
  }

  .eq-label small {
    font-size: 0.42rem;
  }

  .eq-preset-chip {
    padding: 0.3rem 0.55rem;
    font-size: 0.65rem;
  }

  .eq-preset-chip svg {
    width: 12px;
    height: 12px;
  }

  .viz-canvas {
    height: 100px;
  }

  .viz-canvas-vu {
    height: 70px;
  }

  .viz-panel {
    padding: 0.75rem;
  }
}

/* --- Mobile Phones (≤480px) --- */
@media (max-width: 480px) {
  html {
    font-size: 13px;
  }

  .app-header {
    padding: 0.5rem 0.75rem;
  }

  .header-left,
  .header-right {
    gap: 0.4rem;
  }

  .logo h1 {
    font-size: 0.85rem;
  }

  .logo-icon {
    width: 20px;
    height: 20px;
  }

  .player-section {
    padding: 1rem 0.75rem 0.5rem;
    gap: 0.75rem;
  }

  .disc-container {
    width: 100px;
    height: 100px;
  }

  .disc-grooves {
    inset: 6px;
  }

  .disc-inner-ring {
    inset: 26px;
  }

  .disc-label {
    width: 34px;
    height: 34px;
  }

  .disc-label-text {
    font-size: 0.35rem;
    max-width: 28px;
  }

  .disc-center-hole {
    width: 6px;
    height: 6px;
  }

  .disc-glow {
    inset: -12px;
  }

  .btn-play {
    width: 46px;
    height: 46px;
  }

  .btn-play svg {
    width: 22px;
    height: 22px;
  }

  .btn-control {
    width: 36px;
    height: 36px;
  }

  .btn-control svg {
    width: 18px;
    height: 18px;
  }

  .playback-controls {
    gap: 0.75rem;
  }

  .timeline-container {
    gap: 0.5rem;
  }

  .time-display {
    font-size: 0.7rem;
    min-width: 2.8rem;
  }

  .main-grid {
    padding: 0 0.5rem 1rem;
    gap: 0.5rem;
  }

  .effects-panel,
  .eq-panel {
    padding: 0.75rem;
    gap: 0.75rem;
  }

  .panel-title {
    font-size: 0.85rem;
    gap: 0.4rem;
    padding-bottom: 0.4rem;
  }

  .panel-title svg {
    width: 16px;
    height: 16px;
  }

  .control-header label {
    font-size: 0.72rem;
  }

  .control-value {
    font-size: 0.68rem;
    padding: 0.1rem 0.4rem;
  }

  .eq-track-wrap {
    height: 100px;
    width: 28px;
  }

  .eq-slider {
    height: 90px;
  }

  .eq-rack {
    padding: 0.5rem 0.25rem;
  }

  .viz-canvas {
    height: 90px;
  }

  .viz-canvas-vu {
    height: 60px;
  }

  .viz-title {
    font-size: 0.75rem;
  }

  .viz-title svg {
    width: 14px;
    height: 14px;
  }

  .status-bar {
    font-size: 0.7rem;
  }

  .overlay-card {
    padding: 1.5rem 1rem;
    margin: 0.75rem;
    border-radius: var(--radius-md);
  }

  .overlay-card p {
    font-size: 0.85rem;
  }

  /* Slider thumbs larger for touch targets */
  .styled-slider {
    height: 8px;
  }

  .styled-slider::-webkit-slider-thumb {
    width: 20px;
    height: 20px;
  }

  .styled-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
  }

  .timeline-slider {
    height: 6px;
  }

  .timeline-slider::-webkit-slider-thumb {
    width: 18px;
    height: 18px;
  }

  .timeline-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
  }

  .timeline-progress {
    height: 6px;
  }
}

/* --- Very Small Phones (≤360px) --- */
@media (max-width: 360px) {
  html {
    font-size: 12px;
  }

  .app-header {
    padding: 0.4rem 0.5rem;
  }

  .logo h1 {
    font-size: 0.8rem;
  }

  .header-right .btn {
    padding: 0.4rem;
  }

  .header-right .btn svg {
    width: 16px;
    height: 16px;
  }

  .disc-container {
    width: 85px;
    height: 85px;
  }

  .disc-inner-ring {
    inset: 22px;
  }

  .disc-label {
    width: 28px;
    height: 28px;
  }

  .disc-label-text {
    font-size: 0.3rem;
    max-width: 22px;
  }

  .eq-track-wrap {
    height: 90px;
    width: 24px;
  }

  .eq-slider {
    height: 80px;
  }

  .eq-scale {
    min-width: 22px;
    padding: 0.2rem 0.25rem 1rem 0.1rem;
  }
}