body,
html {
  margin: 0;
  padding: 0;
  overflow: hidden;
}
canvas {
  display: block;
}
#controls {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 100%;
  max-width: calc(100dvw - 20px);
  display: block; /* changed from grid to block */
  background: rgba(255, 255, 255, 0.8);
  padding: 10px;
  border-radius: 8px;
  font-family: sans-serif;
  font-size: 14px;
}

#controls label {
  display: grid;
  grid-template-columns: max-content 1fr max-content; /* align text, slider, and value */
  align-items: center;
  gap: 10px;
  margin-bottom: 3px;
}

#controls input[type="range"] {
  width: 100%;
}

#controls button {
  margin-top: 10px;
  margin-right: 5px;
  padding: 5px 10px;
}
#fpsCounter {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 5px 10px;
  border-radius: 5px;
  font-family: sans-serif;
  font-size: 14px;
}
#toggleControls { /* new toggle button style */
  position: absolute;
  bottom: 10px;
  left: 10px;
  padding: 5px 10px;
}