body {
 margin: 0;
 overflow: hidden;
 background: black;
}


canvas {
  /* position canvas behind UI so #controls (z-index:10) is visible */
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100vw;
  height: 100vh; /* use full viewport so layout is predictable */
}


label,
p {
  /* don't force white globally — inherit from container so controls can set readable color */
  color: inherit;
}

#controls {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  height: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 8px;
  border-radius: 6px;
  font-family: sans-serif;
  pointer-events: auto;
  border: 1px solid rgba(255,255,255,0.12);
}

hr {
  transform: rotate(90deg);
  width: 1vh;
  border: 1px solid white;
}

#advanced-controls {
  position: absolute;
  bottom: 12px;
  right: 12px;
  z-index: 11;
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 8px;
  border-radius: 6px;
  font-family: sans-serif;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 200px;
  pointer-events: auto;
  border: 1px solid rgba(255,255,255,0.12);
}

#advanced-controls .control-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

#advanced-controls label {
  width: 80px;
  flex: 0 0 80px;
}

/* small value readouts */
#advanced-controls span {
  min-width: 36px;
  text-align: right;
  color: #ddd;
}