:root {
  --bg-a: #1b1f24;
  --bg-b: #0e1115;
  --fg: #f5f5f5;
  --muted: rgba(245, 245, 245, 0.65);
  --accent: #7fd1ff;
  --accent-warm: #ffcc66;
  --panel: rgba(20, 24, 30, 0.78);
  --panel-border: rgba(255, 255, 255, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: linear-gradient(160deg, var(--bg-a), var(--bg-b));
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--panel-border);
  z-index: 10;
  flex-wrap: wrap;
}

.topbar .group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.topbar label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.topbar select,
.topbar button {
  font: inherit;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.topbar select:hover,
.topbar button:hover {
  background: rgba(255, 255, 255, 0.1);
}

.topbar button.primary {
  background: var(--accent);
  color: #062234;
  border-color: transparent;
  font-weight: 600;
}

.topbar button.primary:hover {
  background: #a4dfff;
}

.topbar button.primary.playing {
  background: var(--accent-warm);
}

.topbar button.off {
  background: rgba(255,255,255,0.02);
  color: var(--muted);
}

.slider-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  padding: 4px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
}

.slider-label input[type="range"] {
  width: 110px;
  accent-color: var(--accent);
}

.slider-label #bounce-val {
  min-width: 36px;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.step {
  width: 28px;
  padding: 4px 0 !important;
  text-align: center;
}

#oct-val {
  display: inline-block;
  min-width: 16px;
  text-align: center;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.palette-wrap {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--panel-border);
  z-index: 10;
  padding-bottom: env(safe-area-inset-bottom);
}

.palette-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 6px 14px 0;
}

.palette-row {
  display: flex;
  align-items: stretch;
  gap: 10px;
  padding: 6px 14px 12px;
}

.octave-ctrl {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  flex: 0 0 auto;
}

.octave-ctrl .step {
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 18px;
  line-height: 1;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--fg);
  cursor: pointer;
}

.octave-ctrl .step:hover { background: rgba(255, 255, 255, 0.12); }

.oct-label {
  font-size: 12px;
  color: var(--muted);
  min-width: 38px;
  text-align: center;
}

.oct-label #oct-val {
  color: var(--fg);
  font-weight: 600;
}

.palette {
  display: flex;
  gap: 8px;
  flex: 1 1 auto;
  overflow-x: auto;
  scrollbar-width: thin;
}

.chip {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--panel-border);
  color: var(--fg);
  font-size: 14px;
  font-weight: 600;
  cursor: grab;
  touch-action: none;
}

.chip:active { cursor: grabbing; }
.chip .deg { font-size: 10px; font-weight: 400; color: var(--muted); margin-top: 2px; }

.chip.dragging {
  opacity: 0.4;
}

.hint {
  position: fixed;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--muted);
  pointer-events: none;
  z-index: 5;
  transition: opacity 0.4s ease;
}

.hint.fade { opacity: 0; }