:root {
  --night: #050814;
  --sea: #071525;
  --mist: #9fd9ff;
  --cyan: #45e0ff;
  --rose: #ff6ea8;
  --gold: #f0c56a;
  --fog: rgba(160, 210, 255, 0.12);
  --ink: rgba(236, 246, 255, 0.92);
  --mute: rgba(190, 214, 240, 0.55);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--night);
  color: var(--ink);
  font-family: "Cormorant Garamond", Georgia, serif;
  overflow: hidden;
}

#stage {
  position: relative;
  width: 100%;
  height: 100%;
  isolation: isolate;
}

#viz {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.brand {
  position: absolute;
  top: clamp(1.25rem, 4vh, 2.5rem);
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  z-index: 4;
  pointer-events: none;
  text-shadow: 0 0 28px rgba(69, 224, 255, 0.35);
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease,
    text-shadow 0.6s ease,
    filter 0.6s ease;
}

/* System-audio live polish (no personal chrome) */
#stage.us-mode .brand {
  text-shadow:
    0 0 22px rgba(69, 224, 255, 0.45),
    0 0 42px rgba(255, 110, 168, 0.35),
    0 0 64px rgba(240, 197, 106, 0.2);
}

#stage.us-mode .brand h1 {
  background: linear-gradient(180deg, #f7fbff 8%, var(--cyan) 42%, #ffe09a 72%, var(--rose) 120%);
  -webkit-background-clip: text;
  background-clip: text;
}

#stage.us-mode .subtitle {
  color: rgba(255, 200, 220, 0.9);
}

#stage.us-mode .meter .dot {
  box-shadow:
    0 0 0 3px rgba(255, 255, 255, 0.08),
    0 0 14px currentColor;
}

#stage.us-mode .status {
  color: rgba(255, 210, 230, 0.75);
  letter-spacing: 0.2em;
}

.eyebrow {
  margin: 0 0 0.35rem;
  font-family: Orbitron, sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--mute);
}

.brand h1 {
  margin: 0;
  font-family: Orbitron, sans-serif;
  font-weight: 700;
  font-size: clamp(2.8rem, 9vw, 5.5rem);
  letter-spacing: 0.28em;
  padding-left: 0.28em;
  line-height: 1;
  background: linear-gradient(180deg, #f7fbff 10%, var(--cyan) 55%, var(--rose) 120%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0.55rem 0 0;
  font-size: clamp(1.15rem, 2.6vw, 1.55rem);
  font-style: italic;
  letter-spacing: 0.08em;
  color: rgba(240, 197, 106, 0.85);
}

.gate {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(69, 224, 255, 0.12), transparent 55%),
    rgba(5, 8, 20, 0.42);
  transition: opacity 0.7s ease, visibility 0.7s ease;
}

.gate.gone {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.gate-card {
  text-align: center;
  max-width: 22rem;
  padding: 1.5rem;
}

.gate-kicker {
  margin: 0;
  font-family: Orbitron, sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.38em;
  text-transform: uppercase;
  color: var(--mute);
}

.gate-line {
  margin: 0.85rem 0 1.1rem;
  font-size: 1.45rem;
  font-style: italic;
  color: var(--ink);
}

.presets {
  display: flex;
  justify-content: center;
  gap: 0.55rem;
  margin: 0 0 1.25rem;
  pointer-events: auto;
}

.preset {
  font-family: Orbitron, sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(159, 217, 255, 0.22);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.preset:hover {
  color: var(--ink);
  border-color: rgba(69, 224, 255, 0.45);
}

.preset.active {
  color: var(--night);
  background: linear-gradient(135deg, var(--cyan), #8af0ff 45%, var(--rose));
  border-color: transparent;
  box-shadow: 0 0 22px rgba(69, 224, 255, 0.28);
}

.chrome-presets {
  margin: 0;
  pointer-events: auto;
}

.chrome-presets .preset {
  padding: 0.55rem 0.8rem;
}

.chrome-presets[hidden] {
  display: none;
}

.pick-label {
  display: block;
  margin-top: 1.1rem;
  font-family: Orbitron, sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--mute);
  cursor: pointer;
  pointer-events: auto;
  transition: color 0.2s ease;
}

.pick-label:hover {
  color: var(--cyan);
}

.pick-chrome {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  pointer-events: auto;
}

.pick-chrome[hidden] {
  display: none;
}

#stage.dragover::after {
  content: "drop it — I'll listen";
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  font-family: Orbitron, sans-serif;
  font-size: clamp(0.85rem, 2.5vw, 1.1rem);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink);
  background: rgba(5, 12, 28, 0.72);
  border: 1px dashed rgba(69, 224, 255, 0.45);
  pointer-events: none;
}

.play-btn,
.toggle {
  font-family: Orbitron, sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--night);
  background: linear-gradient(135deg, var(--cyan), #8af0ff 40%, var(--rose));
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.6rem;
  cursor: pointer;
  box-shadow: 0 0 30px rgba(69, 224, 255, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.system-btn {
  display: block;
  margin: 0.75rem auto 0;
  background: linear-gradient(135deg, var(--gold), #ffe09a 40%, var(--cyan));
  box-shadow: 0 0 30px rgba(240, 197, 106, 0.35);
}

.system-hint {
  margin: 0.7rem 0 0;
  font-family: Orbitron, sans-serif;
  font-size: 0.5rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  line-height: 1.5;
}

.play-btn:hover,
.toggle:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 0 40px rgba(255, 110, 168, 0.4);
}

.chrome {
  position: absolute;
  left: 0;
  right: 0;
  bottom: clamp(1rem, 3vh, 1.75rem);
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  pointer-events: none;
}

.meter {
  display: flex;
  gap: 0.55rem;
  align-items: center;
}

.dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  opacity: 0.35;
  transform: scale(0.85);
  transition: opacity 0.08s linear, transform 0.08s linear, box-shadow 0.08s linear;
  background: var(--mist);
}

.dot.bass {
  background: var(--gold);
}
.dot.mid {
  background: var(--cyan);
}
.dot.air {
  background: var(--rose);
}

.status {
  margin: 0;
  font-family: Orbitron, sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mute);
}

.toggle {
  pointer-events: auto;
  padding: 0.65rem 1.1rem;
  font-size: 0.62rem;
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  box-shadow: none;
  border: 1px solid rgba(159, 217, 255, 0.25);
}

.toggle[hidden] {
  display: none;
}

#stage.ui-hidden .brand,
#stage.ui-hidden .chrome,
#stage.ui-hidden .build-stamp {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease;
}

.brand,
.chrome {
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease,
    text-shadow 0.6s ease,
    filter 0.6s ease;
}

/* Glass synthwave FX panel — independent of main Hide UI */
.fx-panel {
  position: absolute;
  left: 1rem;
  bottom: clamp(4.5rem, 12vh, 6.5rem);
  z-index: 5;
  width: min(16rem, calc(100vw - 2rem));
  padding: 0.7rem 0.75rem 0.85rem;
  border-radius: 14px;
  border: 1px solid rgba(159, 217, 255, 0.32);
  background:
    linear-gradient(145deg, rgba(255, 110, 168, 0.14), rgba(69, 224, 255, 0.08) 45%, rgba(8, 12, 28, 0.48)),
    rgba(6, 10, 24, 0.52);
  backdrop-filter: blur(18px) saturate(1.35);
  -webkit-backdrop-filter: blur(18px) saturate(1.35);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05) inset,
    0 12px 40px rgba(0, 0, 0, 0.4),
    0 0 28px rgba(69, 224, 255, 0.14);
  pointer-events: auto;
  color: var(--ink);
  font-family: Orbitron, sans-serif;
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease;
}

.fx-panel.fx-panel-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.fx-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin: -0.7rem -0.75rem 0.55rem;
  padding: 0.7rem 0.75rem 0.55rem;
  border-bottom: 1px solid rgba(159, 217, 255, 0.14);
  cursor: grab;
  user-select: none;
  touch-action: none;
}

.fx-panel-head:active,
.fx-panel.dragging .fx-panel-head {
  cursor: grabbing;
}

.fx-panel-title {
  font-family: Orbitron, sans-serif;
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(69, 224, 255, 0.45);
  pointer-events: none;
}

.fx-panel-actions {
  display: flex;
  gap: 0.3rem;
  flex-shrink: 0;
}

.fx-panel-icon {
  width: 1.55rem;
  height: 1.55rem;
  padding: 0;
  border-radius: 8px;
  border: 1px solid rgba(159, 217, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
  color: var(--mute);
  font-family: Orbitron, sans-serif;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
}

.fx-panel-icon:hover {
  color: var(--rose);
  border-color: rgba(255, 110, 168, 0.45);
}

.fx-panel-body {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  max-height: min(42vh, 22rem);
  overflow: auto;
  padding-right: 0.15rem;
}

.fx-panel.collapsed .fx-panel-body {
  display: none;
}

.fx-panel-group {
  margin: 0.5rem 0 0.15rem;
  font-family: Orbitron, sans-serif;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(240, 197, 106, 0.85);
}

.fx-panel-group:first-child {
  margin-top: 0;
}

.fx-toggle {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0.32rem 0.35rem;
  border-radius: 8px;
  font-family: Orbitron, sans-serif;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: rgba(236, 244, 255, 0.9);
  cursor: pointer;
  user-select: none;
}

.fx-toggle:hover {
  background: rgba(69, 224, 255, 0.1);
}

.fx-toggle.fx-toggle-disabled {
  opacity: 0.38;
  cursor: not-allowed;
  filter: grayscale(0.35);
}

.fx-toggle.fx-toggle-disabled:hover {
  background: transparent;
}

.fx-toggle.fx-toggle-disabled input {
  cursor: not-allowed;
  opacity: 0.7;
}

.fx-toggle input {
  appearance: none;
  width: 0.85rem;
  height: 0.85rem;
  margin: 0;
  border-radius: 4px;
  border: 1px solid rgba(159, 217, 255, 0.45);
  background: rgba(0, 0, 0, 0.4);
  box-shadow: 0 0 8px rgba(69, 224, 255, 0.15) inset;
  cursor: pointer;
  flex-shrink: 0;
}

.fx-toggle input:checked {
  background: linear-gradient(135deg, rgba(255, 110, 168, 0.85), rgba(69, 224, 255, 0.75));
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 0 12px rgba(255, 110, 168, 0.35);
}

.fx-slider {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0.2rem 0 0;
  padding: 0.4rem 0.35rem 0.45rem;
  border-radius: 8px;
  font-family: Orbitron, sans-serif;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: rgba(236, 244, 255, 0.9);
  user-select: none;
}

.fx-slider:hover {
  background: rgba(69, 224, 255, 0.1);
}

.fx-slider-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}

.fx-slider-label span {
  font-variant-numeric: tabular-nums;
  color: rgba(240, 197, 106, 0.95);
  letter-spacing: 0.08em;
}

.fx-slider input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: #45e0ff;
  cursor: pointer;
}

.fx-peek {
  position: absolute;
  left: 0.85rem;
  bottom: 0.85rem;
  z-index: 6;
  min-width: 2.4rem;
  height: 2rem;
  padding: 0 0.45rem;
  border-radius: 999px;
  border: 1px solid rgba(159, 217, 255, 0.28);
  background: rgba(5, 8, 20, 0.5);
  color: var(--mute);
  font-family: Orbitron, sans-serif;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  pointer-events: auto;
}

.fx-peek:hover {
  opacity: 0.95;
  color: var(--cyan);
  border-color: rgba(69, 224, 255, 0.55);
}

.fx-peek[hidden] {
  display: none;
}

@media (max-width: 640px) {
  .fx-panel {
    left: 0.65rem;
    bottom: 5.5rem;
    width: min(14rem, calc(100vw - 1.3rem));
  }
}

.ui-peek {
  position: absolute;
  right: 0.85rem;
  bottom: 0.85rem;
  z-index: 6;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border-radius: 999px;
  border: 1px solid rgba(159, 217, 255, 0.28);
  background: rgba(5, 8, 20, 0.45);
  color: var(--mute);
  font-family: Orbitron, sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  opacity: 0.45;
  transition: opacity 0.25s ease, color 0.25s ease, border-color 0.25s ease;
  pointer-events: auto;
}

.ui-peek:hover {
  opacity: 0.95;
  color: var(--cyan);
  border-color: rgba(69, 224, 255, 0.55);
}

.ui-peek[hidden] {
  display: none;
}

.build-stamp {
  position: absolute;
  top: clamp(1.25rem, 4vh, 2.5rem);
  right: 0.85rem;
  z-index: 4;
  margin: 0;
  font-family: Orbitron, sans-serif;
  font-size: 0.48rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(159, 217, 255, 0.42);
  pointer-events: none;
  user-select: none;
  transition:
    opacity 0.35s ease,
    visibility 0.35s ease,
    color 0.35s ease;
}

.build-stamp[hidden] {
  display: none;
}

@media (max-width: 640px) {
  .brand h1 {
    letter-spacing: 0.18em;
    padding-left: 0.18em;
  }

  .chrome {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
}